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scanner system</title> <meta name="description" content="Search results for: laser scanner system"> <meta name="keywords" content="laser scanner system"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="laser scanner system"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 18293</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: laser scanner system</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18293</span> Development of 3D Laser Scanner for Robot Navigation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ali%20Emre%20%C3%96zt%C3%BCrk">Ali Emre Öztürk</a>, <a href="https://publications.waset.org/abstracts/search?q=Ergun%20Ercelebi"> Ergun Ercelebi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Autonomous robotic systems needs an equipment like a human eye for their movement. Robotic camera systems, distance sensors and 3D laser scanners have been used in the literature. In this study a 3D laser scanner has been produced for those autonomous robotic systems. In general 3D laser scanners are using 2 dimension laser range finders that are moving on one-axis (1D) to generate the model. In this study, the model has been obtained by a one-dimensional laser range finder that is moving in two –axis (2D) and because of this the laser scanner has been produced cheaper. Furthermore for the laser scanner a motor driver, an embedded system control board has been used and at the same time a user interface card has been used to make the communication between those cards and computer. Due to this laser scanner, the density of the objects, the distance between the objects and the necessary path ways for the robot can be calculated. The data collected by the laser scanner system is converted in to cartesian coordinates to be modeled in AutoCAD program. This study shows also the synchronization between the computer user interface, AutoCAD and the embedded systems. As a result it makes the solution cheaper for such systems. The scanning results are enough for an autonomous robot but the scan cycle time should be developed. This study makes also contribution for further studies between the hardware and software needs since it has a powerful performance and a low cost. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=3D%20laser%20scanner" title="3D laser scanner">3D laser scanner</a>, <a href="https://publications.waset.org/abstracts/search?q=embedded%20system" title=" embedded system"> embedded system</a>, <a href="https://publications.waset.org/abstracts/search?q=1D%20laser%20range%20finder" title=" 1D laser range finder"> 1D laser range finder</a>, <a href="https://publications.waset.org/abstracts/search?q=3D%20model" title=" 3D model"> 3D model</a> </p> <a href="https://publications.waset.org/abstracts/3355/development-of-3d-laser-scanner-for-robot-navigation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3355.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">274</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18292</span> Study and Conservation of Cultural and Natural Heritages with the Use of Laser Scanner and Processing System for 3D Modeling Spatial Data</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Julia%20Desiree%20Velastegui%20Caceres">Julia Desiree Velastegui Caceres</a>, <a href="https://publications.waset.org/abstracts/search?q=Luis%20Alejandro%20Velastegui%20Caceres"> Luis Alejandro Velastegui Caceres</a>, <a href="https://publications.waset.org/abstracts/search?q=Oswaldo%20Padilla"> Oswaldo Padilla</a>, <a href="https://publications.waset.org/abstracts/search?q=Eduardo%20Kirby"> Eduardo Kirby</a>, <a href="https://publications.waset.org/abstracts/search?q=Francisco%20Guerrero"> Francisco Guerrero</a>, <a href="https://publications.waset.org/abstracts/search?q=Theofilos%20%20Toulkeridis"> Theofilos Toulkeridis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> It is fundamental to conserve sites of natural and cultural heritage with any available technique or existing methodology of preservation in order to sustain them for the following generations. We propose a further skill to protect the actual view of such sites, in which with high technology instrumentation we are able to digitally preserve natural and cultural heritages applied in Ecuador. In this project the use of laser technology is presented for three-dimensional models, with high accuracy in a relatively short period of time. In Ecuador so far, there are not any records on the use and processing of data obtained by this new technological trend. The importance of the project is the description of the methodology of the laser scanner system using the Faro Laser Scanner Focus 3D 120, the method for 3D modeling of geospatial data and the development of virtual environments in the areas of Cultural and Natural Heritage. In order to inform users this trend in technology in which three-dimensional models are generated, the use of such tools has been developed to be able to be displayed in all kinds of digitally formats. The results of the obtained 3D models allows to demonstrate that this technology is extremely useful in these areas, but also indicating that each data campaign needs an individual slightly different proceeding starting with the data capture and processing to obtain finally the chosen virtual environments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laser%20scanner%20system" title="laser scanner system">laser scanner system</a>, <a href="https://publications.waset.org/abstracts/search?q=3D%20model" title=" 3D model"> 3D model</a>, <a href="https://publications.waset.org/abstracts/search?q=cultural%20heritage" title=" cultural heritage"> cultural heritage</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20heritage" title=" natural heritage"> natural heritage</a> </p> <a href="https://publications.waset.org/abstracts/58508/study-and-conservation-of-cultural-and-natural-heritages-with-the-use-of-laser-scanner-and-processing-system-for-3d-modeling-spatial-data" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/58508.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">306</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18291</span> 3D Point Cloud Model Color Adjustment by Combining Terrestrial Laser Scanner and Close Range Photogrammetry Datasets</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Pepe">M. Pepe</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Ackermann"> S. Ackermann</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Fregonese"> L. Fregonese</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Achille"> C. Achille</a> </p> <p class="card-text"><strong>Abstract:</strong></p> 3D models obtained with advanced survey techniques such as close-range photogrammetry and laser scanner are nowadays particularly appreciated in Cultural Heritage and Archaeology fields. In order to produce high quality models representing archaeological evidences and anthropological artifacts, the appearance of the model (i.e. color) beyond the geometric accuracy, is not a negligible aspect. The integration of the close-range photogrammetry survey techniques with the laser scanner is still a topic of study and research. By combining point cloud data sets of the same object generated with both technologies, or with the same technology but registered in different moment and/or natural light condition, could construct a final point cloud with accentuated color dissimilarities. In this paper, a methodology to uniform the different data sets, to improve the chromatic quality and to highlight further details by balancing the point color will be presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=color%20models" title="color models">color models</a>, <a href="https://publications.waset.org/abstracts/search?q=cultural%20heritage" title=" cultural heritage"> cultural heritage</a>, <a href="https://publications.waset.org/abstracts/search?q=laser%20scanner" title=" laser scanner"> laser scanner</a>, <a href="https://publications.waset.org/abstracts/search?q=photogrammetry" title=" photogrammetry"> photogrammetry</a> </p> <a href="https://publications.waset.org/abstracts/54399/3d-point-cloud-model-color-adjustment-by-combining-terrestrial-laser-scanner-and-close-range-photogrammetry-datasets" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54399.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">280</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18290</span> Assessment of Runway Micro Texture Using Surface Laser Scanners: An Explorative Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gerard%20Van%20Es">Gerard Van Es</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the use of a high resolution surface laser scanner to assess the micro texture of runway surfaces was investigated experimentally. Micro texture is one of the important surface components that helps to provide high braking friction between aircraft tires and a wet runway surface. Algorithms to derive different parameters that characterise micro texture was developed. Surface scans with a high resolution laser scanner were conducted on 40 different runway (like) surfaces. For each surface micro texture parameters were calculated from the laser scan data. These results were correlated with results obtained from a British pendulum tester that was used on the same surface. Results obtained with the British pendulum tester are generally considered to be indicative for the micro texture related friction characteristics. The results show that a meaningful correlation can be found between different parameters that characterise micro texture obtained with the laser scanner and the British pendulum tester results. Surface laser scanners are easier to operate and give more consistent results than a British pendulum tester. Therefore for airport operators surface laser scanners can be a useful tool to determine if their runway becomes slippery when wet due to a smooth micro texture. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=runway%20friction" title="runway friction">runway friction</a>, <a href="https://publications.waset.org/abstracts/search?q=micro%20texture" title=" micro texture"> micro texture</a>, <a href="https://publications.waset.org/abstracts/search?q=aircraft%20braking%20performance" title=" aircraft braking performance"> aircraft braking performance</a>, <a href="https://publications.waset.org/abstracts/search?q=slippery%20runways" title=" slippery runways"> slippery runways</a> </p> <a href="https://publications.waset.org/abstracts/151466/assessment-of-runway-micro-texture-using-surface-laser-scanners-an-explorative-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151466.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">121</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18289</span> Comparisons of Surveying with Terrestrial Laser Scanner and Total Station for Volume Determination of Overburden and Coal Excavations in Large Open-Pit Mine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20Keawaram">B. Keawaram</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Dumrongchai"> P. Dumrongchai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The volume of overburden and coal excavations in open-pit mine is generally determined by conventional survey such as total station. This study aimed to evaluate the accuracy of terrestrial laser scanner (TLS) used to measure overburden and coal excavations, and to compare TLS survey data sets with the data of the total station. Results revealed that, the reference points measured with the total station showed 0.2 mm precision for both horizontal and vertical coordinates. When using TLS on the same points, the standard deviations of 4.93 cm and 0.53 cm for horizontal and vertical coordinates, respectively, were achieved. For volume measurements covering the mining areas of 79,844 m<sup>2</sup>, TLS yielded the mean difference of about 1% and the surface error margin of 6 cm at the 95% confidence level when compared to the volume obtained by total station. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mine" title="mine">mine</a>, <a href="https://publications.waset.org/abstracts/search?q=survey" title=" survey"> survey</a>, <a href="https://publications.waset.org/abstracts/search?q=terrestrial%20laser%20scanner" title=" terrestrial laser scanner"> terrestrial laser scanner</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20station" title=" total station"> total station</a> </p> <a href="https://publications.waset.org/abstracts/68291/comparisons-of-surveying-with-terrestrial-laser-scanner-and-total-station-for-volume-determination-of-overburden-and-coal-excavations-in-large-open-pit-mine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/68291.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">385</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18288</span> Using T-Splines to Model Point Clouds from Terrestrial Laser Scanner</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20Kermarrec">G. Kermarrec</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Hartmann"> J. Hartmann</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Spline surfaces are a major representation of freeform surfaces in the computer-aided graphic industry and were recently introduced in the field of geodesy for processing point clouds from terrestrial laser scanner (TLS). The surface fitting consists of approximating a trustworthy mathematical surface to a large numbered 3D point cloud. The standard B-spline surfaces lack of local refinement due to the tensor-product construction. The consequences are oscillating geometry, particularly in the transition from low-to-high curvature parts for scattered point clouds with missing data. More economic alternatives in terms of parameters on how to handle point clouds with a huge amount of observations are the recently introduced T-splines. As long as the partition of unity is guaranteed, their computational complexity is low, and they are flexible. T-splines are implemented in a commercial package called Rhino, a 3D modeler which is widely used in computer aided design to create and animate NURBS objects. We have applied T-splines surface fitting to terrestrial laser scanner point clouds from a bridge under load and a sheet pile wall with noisy observations. We will highlight their potential for modelling details with high trustworthiness, paving the way for further applications in terms of deformation analysis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=deformation%20analysis" title="deformation analysis">deformation analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20modelling" title=" surface modelling"> surface modelling</a>, <a href="https://publications.waset.org/abstracts/search?q=terrestrial%20laser%20scanner" title=" terrestrial laser scanner"> terrestrial laser scanner</a>, <a href="https://publications.waset.org/abstracts/search?q=T-splines" title=" T-splines"> T-splines</a> </p> <a href="https://publications.waset.org/abstracts/130510/using-t-splines-to-model-point-clouds-from-terrestrial-laser-scanner" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/130510.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">140</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18287</span> Basic Study of Mammographic Image Magnification System with Eye-Detector and Simple EEG Scanner</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aika%20Umemuro">Aika Umemuro</a>, <a href="https://publications.waset.org/abstracts/search?q=Mitsuru%20Sato"> Mitsuru Sato</a>, <a href="https://publications.waset.org/abstracts/search?q=Mizuki%20Narita"> Mizuki Narita</a>, <a href="https://publications.waset.org/abstracts/search?q=Saya%20Hori"> Saya Hori</a>, <a href="https://publications.waset.org/abstracts/search?q=Saya%20Sakurai"> Saya Sakurai</a>, <a href="https://publications.waset.org/abstracts/search?q=Tomomi%20Nakayama"> Tomomi Nakayama</a>, <a href="https://publications.waset.org/abstracts/search?q=Ayano%20Nakazawa"> Ayano Nakazawa</a>, <a href="https://publications.waset.org/abstracts/search?q=Toshihiro%20Ogura"> Toshihiro Ogura</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mammography requires the detection of very small calcifications, and physicians search for microcalcifications by magnifying the images as they read them. The mouse is necessary to zoom in on the images, but this can be tiring and distracting when many images are read in a single day. Therefore, an image magnification system combining an eye-detector and a simple electroencephalograph (EEG) scanner was devised, and its operability was evaluated. Two experiments were conducted in this study: the measurement of eye-detection error using an eye-detector and the measurement of the time required for image magnification using a simple EEG scanner. Eye-detector validation showed that the mean distance of eye-detection error ranged from 0.64 cm to 2.17 cm, with an overall mean of 1.24 ± 0.81 cm for the observers. The results showed that the eye detection error was small enough for the magnified area of the mammographic image. The average time required for point magnification in the verification of the simple EEG scanner ranged from 5.85 to 16.73 seconds, and individual differences were observed. The reason for this may be that the size of the simple EEG scanner used was not adjustable, so it did not fit well for some subjects. The use of a simple EEG scanner with size adjustment would solve this problem. Therefore, the image magnification system using the eye-detector and the simple EEG scanner is useful. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=EEG%20scanner" title="EEG scanner">EEG scanner</a>, <a href="https://publications.waset.org/abstracts/search?q=eye-detector" title=" eye-detector"> eye-detector</a>, <a href="https://publications.waset.org/abstracts/search?q=mammography" title=" mammography"> mammography</a>, <a href="https://publications.waset.org/abstracts/search?q=observers" title=" observers"> observers</a> </p> <a href="https://publications.waset.org/abstracts/155822/basic-study-of-mammographic-image-magnification-system-with-eye-detector-and-simple-eeg-scanner" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/155822.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">215</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18286</span> Magnet Position Variation of the Electromagnetic Actuation System in a Torsional Scanner</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Loke%20Kean%20Koay">Loke Kean Koay</a>, <a href="https://publications.waset.org/abstracts/search?q=Mani%20Maran%20Ratnam"> Mani Maran Ratnam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A mechanically-resonant torsional spring scanner was developed in a recent study. Various methods were developed to improve the angular displacement of the scanner while maintaining the scanner frequency. However, the effects of rotor magnet radial position on scanner characteristics were not well investigated. In this study, the relationships between the magnet position and the scanner characteristics such as natural frequency, angular displacement and stress level were studied. A finite element model was created and an average deviation of 3.18% was found between the simulation and experimental results, qualifying the simulation results as a guide for further investigations. Three magnet positions on the transverse oscillating suspended plate were investigated by finite element analysis (FEA) and one of the positions were selected as the design position. The magnet position with the longest distance from the twist axis of the mirror was selected since it attains minimum stress level while exceeding the minimum critical flicker frequency and delivering the targeted angular displacement to the scanner. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=torsional%20scanner" title="torsional scanner">torsional scanner</a>, <a href="https://publications.waset.org/abstracts/search?q=design%20optimization" title=" design optimization"> design optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=computer-aided%20design" title=" computer-aided design"> computer-aided design</a>, <a href="https://publications.waset.org/abstracts/search?q=magnet%20position%20variation" title=" magnet position variation"> magnet position variation</a> </p> <a href="https://publications.waset.org/abstracts/10094/magnet-position-variation-of-the-electromagnetic-actuation-system-in-a-torsional-scanner" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10094.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">366</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18285</span> Laser Registration and Supervisory Control of neuroArm Robotic Surgical System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hamidreza%20Hoshyarmanesh">Hamidreza Hoshyarmanesh</a>, <a href="https://publications.waset.org/abstracts/search?q=Hosein%20Madieh"> Hosein Madieh</a>, <a href="https://publications.waset.org/abstracts/search?q=Sanju%20Lama"> Sanju Lama</a>, <a href="https://publications.waset.org/abstracts/search?q=Yaser%20Maddahi"> Yaser Maddahi</a>, <a href="https://publications.waset.org/abstracts/search?q=Garnette%20R.%20Sutherland"> Garnette R. Sutherland</a>, <a href="https://publications.waset.org/abstracts/search?q=Kourosh%20Zareinia"> Kourosh Zareinia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper illustrates the concept of an algorithm to register specified markers on the neuroArm surgical manipulators, an image-guided MR-compatible tele-operated robot for microsurgery and stereotaxy. Two range-finding algorithms, namely time-of-flight and phase-shift, are evaluated for registration and supervisory control. The time-of-flight approach is implemented in a semi-field experiment to determine the precise position of a tiny retro-reflective moving object. The moving object simulates a surgical tool tip. The tool is a target that would be connected to the neuroArm end-effector during surgery inside the magnet bore of the MR imaging system. In order to apply flight approach, a 905-nm pulsed laser diode and an avalanche photodiode are utilized as the transmitter and receiver, respectively. For the experiment, a high frequency time to digital converter was designed using a field-programmable gate arrays. In the phase-shift approach, a continuous green laser beam with a wavelength of 530 nm was used as the transmitter. Results showed that a positioning error of 0.1 mm occurred when the scanner-target point distance was set in the range of 2.5 to 3 meters. The effectiveness of this non-contact approach exhibited that the method could be employed as an alternative for conventional mechanical registration arm. Furthermore, the approach is not limited by physical contact and extension of joint angles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=3D%20laser%20scanner" title="3D laser scanner">3D laser scanner</a>, <a href="https://publications.waset.org/abstracts/search?q=intraoperative%20MR%20imaging" title=" intraoperative MR imaging"> intraoperative MR imaging</a>, <a href="https://publications.waset.org/abstracts/search?q=neuroArm" title=" neuroArm"> neuroArm</a>, <a href="https://publications.waset.org/abstracts/search?q=real%20time%20registration" title=" real time registration"> real time registration</a>, <a href="https://publications.waset.org/abstracts/search?q=robot-assisted%20surgery" title=" robot-assisted surgery"> robot-assisted surgery</a>, <a href="https://publications.waset.org/abstracts/search?q=supervisory%20control" title=" supervisory control"> supervisory control</a> </p> <a href="https://publications.waset.org/abstracts/70477/laser-registration-and-supervisory-control-of-neuroarm-robotic-surgical-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/70477.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">286</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18284</span> Combination of Unmanned Aerial Vehicle and Terrestrial Laser Scanner Data for Citrus Yield Estimation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20Hmimou">Mohammed Hmimou</a>, <a href="https://publications.waset.org/abstracts/search?q=Khalid%20Amediaz"> Khalid Amediaz</a>, <a href="https://publications.waset.org/abstracts/search?q=Imane%20Sebari"> Imane Sebari</a>, <a href="https://publications.waset.org/abstracts/search?q=Nabil%20Bounajma"> Nabil Bounajma</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Annual crop production is one of the most important macroeconomic indicators for the majority of countries around the world. This information is valuable, especially for exporting countries which need a yield estimation before harvest in order to correctly plan the supply chain. When it comes to estimating agricultural yield, especially for arboriculture, conventional methods are mostly applied. In the case of the citrus industry, the sale before harvest is largely practiced, which requires an estimation of the production when the fruit is on the tree. However, conventional method based on the sampling surveys of some trees within the field is always used to perform yield estimation, and the success of this process mainly depends on the expertise of the ‘estimator agent’. The present study aims to propose a methodology based on the combination of unmanned aerial vehicle (UAV) images and terrestrial laser scanner (TLS) point cloud to estimate citrus production. During data acquisition, a fixed wing and rotatory drones, as well as a terrestrial laser scanner, were tested. After that, a pre-processing step was performed in order to generate point cloud and digital surface model. At the processing stage, a machine vision workflow was implemented to extract points corresponding to fruits from the whole tree point cloud, cluster them into fruits, and model them geometrically in a 3D space. By linking the resulting geometric properties to the fruit weight, the yield can be estimated, and the statistical distribution of fruits size can be generated. This later property, which is information required by importing countries of citrus, cannot be estimated before harvest using the conventional method. Since terrestrial laser scanner is static, data gathering using this technology can be performed over only some trees. So, integration of drone data was thought in order to estimate the yield over a whole orchard. To achieve that, features derived from drone digital surface model were linked to yield estimation by laser scanner of some trees to build a regression model that predicts the yield of a tree given its features. Several missions were carried out to collect drone and laser scanner data within citrus orchards of different varieties by testing several data acquisition parameters (fly height, images overlap, fly mission plan). The accuracy of the obtained results by the proposed methodology in comparison to the yield estimation results by the conventional method varies from 65% to 94% depending mainly on the phenological stage of the studied citrus variety during the data acquisition mission. The proposed approach demonstrates its strong potential for early estimation of citrus production and the possibility of its extension to other fruit trees. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=citrus" title="citrus">citrus</a>, <a href="https://publications.waset.org/abstracts/search?q=digital%20surface%20model" title=" digital surface model"> digital surface model</a>, <a href="https://publications.waset.org/abstracts/search?q=point%20cloud" title=" point cloud"> point cloud</a>, <a href="https://publications.waset.org/abstracts/search?q=terrestrial%20laser%20scanner" title=" terrestrial laser scanner"> terrestrial laser scanner</a>, <a href="https://publications.waset.org/abstracts/search?q=UAV" title=" UAV"> UAV</a>, <a href="https://publications.waset.org/abstracts/search?q=yield%20estimation" title=" yield estimation"> yield estimation</a>, <a href="https://publications.waset.org/abstracts/search?q=3D%20modeling" title=" 3D modeling"> 3D modeling</a> </p> <a href="https://publications.waset.org/abstracts/104929/combination-of-unmanned-aerial-vehicle-and-terrestrial-laser-scanner-data-for-citrus-yield-estimation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/104929.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">142</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18283</span> Low-Cost Mechatronic Design of an Omnidirectional Mobile Robot </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Cobos-Guzman">S. Cobos-Guzman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents the results of a mechatronic design based on a 4-wheel omnidirectional mobile robot that can be used in indoor logistic applications. The low-level control has been selected using two open-source hardware (Raspberry Pi 3 Model B+ and Arduino Mega 2560) that control four industrial motors, four ultrasound sensors, four optical encoders, a vision system of two cameras, and a Hokuyo URG-04LX-UG01 laser scanner. Moreover, the system is powered with a lithium battery that can supply 24 V DC and a maximum current-hour of 20Ah.The Robot Operating System (ROS) has been implemented in the Raspberry Pi and the performance is evaluated with the selection of the sensors and hardware selected. The mechatronic system is evaluated and proposed safe modes of power distribution for controlling all the electronic devices based on different tests. Therefore, based on different performance results, some recommendations are indicated for using the Raspberry Pi and Arduino in terms of power, communication, and distribution of control for different devices. According to these recommendations, the selection of sensors is distributed in both real-time controllers (Arduino and Raspberry Pi). On the other hand, the drivers of the cameras have been implemented in Linux and a python program has been implemented to access the cameras. These cameras will be used for implementing a deep learning algorithm to recognize people and objects. In this way, the level of intelligence can be increased in combination with the maps that can be obtained from the laser scanner. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=autonomous" title="autonomous">autonomous</a>, <a href="https://publications.waset.org/abstracts/search?q=indoor%20robot" title=" indoor robot"> indoor robot</a>, <a href="https://publications.waset.org/abstracts/search?q=mechatronic" title=" mechatronic"> mechatronic</a>, <a href="https://publications.waset.org/abstracts/search?q=omnidirectional%20robot" title=" omnidirectional robot"> omnidirectional robot</a> </p> <a href="https://publications.waset.org/abstracts/123510/low-cost-mechatronic-design-of-an-omnidirectional-mobile-robot" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/123510.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">175</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18282</span> Wobbled Laser Beam Welding for Macro-to Micro-Fabrication Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Farzad%20Vakili-Farahani">Farzad Vakili-Farahani</a>, <a href="https://publications.waset.org/abstracts/search?q=Joern%20Lungershausen"> Joern Lungershausen</a>, <a href="https://publications.waset.org/abstracts/search?q=Kilian%20Wasmer"> Kilian Wasmer</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Wobbled laser beam welding, fast oscillations of a tiny laser beam within a designed path (weld geometry) during the laser pulse illumination, opens new possibilities to improve the marco-to micro-manufacturing process. The present work introduces the wobbled laser beam welding as a robust welding strategy for improving macro-to micro-fabrication process, e.g., the laser processing for gap-bridging and packaging industry. The typical requisites and relevant equipment for the development of a wobbled laser processing unit are addressed, including a suitable laser source, light delivery system, optics, proper beam deflection system and the design geometry. In addition, experiments have been carried out on titanium plate to compare the results of wobbled laser welding with conventional pulsed laser welding. As compared to the pulsed laser welding, the wobbled laser welding offers a much greater fusion area (i.e. additional molten material) while minimizing the HAZ and provides a better confinement of the material microstructural changes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=wobbled%20laser%20beam%20welding" title="wobbled laser beam welding">wobbled laser beam welding</a>, <a href="https://publications.waset.org/abstracts/search?q=wobbling%20function" title=" wobbling function"> wobbling function</a>, <a href="https://publications.waset.org/abstracts/search?q=beam%20oscillation" title=" beam oscillation"> beam oscillation</a>, <a href="https://publications.waset.org/abstracts/search?q=micro%20welding" title=" micro welding"> micro welding</a> </p> <a href="https://publications.waset.org/abstracts/56603/wobbled-laser-beam-welding-for-macro-to-micro-fabrication-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56603.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">328</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18281</span> Developing Laser Spot Position Determination and PRF Code Detection with Quadrant Detector</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Fathy%20Heweage">Mohamed Fathy Heweage</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiao%20Wen"> Xiao Wen</a>, <a href="https://publications.waset.org/abstracts/search?q=Ayman%20Mokhtar"> Ayman Mokhtar</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Eldamarawy"> Ahmed Eldamarawy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we are interested in modeling, simulation, and measurement of the laser spot position with a quadrant detector. We enhance detection and tracking of semi-laser weapon decoding system based on microcontroller. The system receives the reflected pulse through quadrant detector and processes the laser pulses through a processing circuit, a microcontroller decoding laser pulse reflected by the target. The seeker accuracy will be enhanced by the decoding system, the laser detection time based on the receiving pulses number is reduced, a gate is used to limit the laser pulse width. The model is implemented based on Pulse Repetition Frequency (PRF) technique with two microcontroller units (MCU). MCU1 generates laser pulses with different codes. MCU2 decodes the laser code and locks the system at the specific code. The codes EW selected based on the two selector switches. The system is implemented and tested in Proteus ISIS software. The implementation of the full position determination circuit with the detector is produced. General system for the spot position determination was performed with the laser PRF for incident radiation and the mechanical system for adjusting system at different angles. The system test results show that the system can detect the laser code with only three received pulses based on the narrow gate signal, and good agreement between simulation and measured system performance is obtained. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=four%20quadrant%20detector" title="four quadrant detector">four quadrant detector</a>, <a href="https://publications.waset.org/abstracts/search?q=pulse%20code%20detection" title=" pulse code detection"> pulse code detection</a>, <a href="https://publications.waset.org/abstracts/search?q=laser%20guided%20weapons" title=" laser guided weapons"> laser guided weapons</a>, <a href="https://publications.waset.org/abstracts/search?q=pulse%20repetition%20frequency%20%28PRF%29" title=" pulse repetition frequency (PRF)"> pulse repetition frequency (PRF)</a>, <a href="https://publications.waset.org/abstracts/search?q=Atmega%2032%20microcontrollers" title=" Atmega 32 microcontrollers"> Atmega 32 microcontrollers</a> </p> <a href="https://publications.waset.org/abstracts/66984/developing-laser-spot-position-determination-and-prf-code-detection-with-quadrant-detector" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66984.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">389</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18280</span> Bridge Members Segmentation Algorithm of Terrestrial Laser Scanner Point Clouds Using Fuzzy Clustering Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Donghwan%20Lee">Donghwan Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Gichun%20Cha"> Gichun Cha</a>, <a href="https://publications.waset.org/abstracts/search?q=Jooyoung%20Park"> Jooyoung Park</a>, <a href="https://publications.waset.org/abstracts/search?q=Junkyeong%20Kim"> Junkyeong Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Seunghee%20Park"> Seunghee Park</a> </p> <p class="card-text"><strong>Abstract:</strong></p> 3D shape models of the existing structure are required for many purposes such as safety and operation management. The traditional 3D modeling methods are based on manual or semi-automatic reconstruction from close-range images. It occasions great expense and time consuming. The Terrestrial Laser Scanner (TLS) is a common survey technique to measure quickly and accurately a 3D shape model. This TLS is used to a construction site and cultural heritage management. However there are many limits to process a TLS point cloud, because the raw point cloud is massive volume data. So the capability of carrying out useful analyses is also limited with unstructured 3-D point. Thus, segmentation becomes an essential step whenever grouping of points with common attributes is required. In this paper, members segmentation algorithm was presented to separate a raw point cloud which includes only 3D coordinates. This paper presents a clustering approach based on a fuzzy method for this objective. The Fuzzy C-Means (FCM) is reviewed and used in combination with a similarity-driven cluster merging method. It is applied to the point cloud acquired with Lecia Scan Station C10/C5 at the test bed. The test-bed was a bridge which connects between 1st and 2nd engineering building in Sungkyunkwan University in Korea. It is about 32m long and 2m wide. This bridge was used as pedestrian between two buildings. The 3D point cloud of the test-bed was constructed by a measurement of the TLS. This data was divided by segmentation algorithm for each member. Experimental analyses of the results from the proposed unsupervised segmentation process are shown to be promising. It can be processed to manage configuration each member, because of the segmentation process of point cloud. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fuzzy%20c-means%20%28FCM%29" title="fuzzy c-means (FCM)">fuzzy c-means (FCM)</a>, <a href="https://publications.waset.org/abstracts/search?q=point%20cloud" title=" point cloud"> point cloud</a>, <a href="https://publications.waset.org/abstracts/search?q=segmentation" title=" segmentation"> segmentation</a>, <a href="https://publications.waset.org/abstracts/search?q=terrestrial%20laser%20scanner%20%28TLS%29" title=" terrestrial laser scanner (TLS)"> terrestrial laser scanner (TLS)</a> </p> <a href="https://publications.waset.org/abstracts/40802/bridge-members-segmentation-algorithm-of-terrestrial-laser-scanner-point-clouds-using-fuzzy-clustering-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40802.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">234</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18279</span> Comparative Study of Bending Angle in Laser Forming Process Using Artificial Neural Network and Fuzzy Logic System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Hassani">M. Hassani</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Hassani"> Y. Hassani</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Ajudanioskooei"> N. Ajudanioskooei</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20N.%20Benvid"> N. N. Benvid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Laser Forming process as a non-contact thermal forming process is widely used to forming and bending of metallic and non-metallic sheets. In this process, according to laser irradiation along a specific path, sheet is bent. One of the most important output parameters in laser forming is bending angle that depends on process parameters such as physical and mechanical properties of materials, laser power, laser travel speed and the number of scan passes. In this paper, Artificial Neural Network and Fuzzy Logic System were used to predict of bending angle in laser forming process. Inputs to these models were laser travel speed and laser power. The comparison between artificial neural network and fuzzy logic models with experimental results has been shown both of these models have high ability to prediction of bending angles with minimum errors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=artificial%20neural%20network" title="artificial neural network">artificial neural network</a>, <a href="https://publications.waset.org/abstracts/search?q=bending%20angle" title=" bending angle"> bending angle</a>, <a href="https://publications.waset.org/abstracts/search?q=fuzzy%20logic" title=" fuzzy logic"> fuzzy logic</a>, <a href="https://publications.waset.org/abstracts/search?q=laser%20forming" title=" laser forming"> laser forming</a> </p> <a href="https://publications.waset.org/abstracts/34045/comparative-study-of-bending-angle-in-laser-forming-process-using-artificial-neural-network-and-fuzzy-logic-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34045.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">597</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18278</span> Flexible Integration of Airbag Weakening Lines in Interior Components: Airbag Weakening with Jenoptik Laser Technology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Markus%20Remm">Markus Remm</a>, <a href="https://publications.waset.org/abstracts/search?q=Sebastian%20Dienert"> Sebastian Dienert</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Vehicle interiors are not only changing in terms of design and functionality but also due to new driving situations in which, for example, autonomous operating modes are possible. Flexible seating positions are changing the requirements for passive safety system behavior and location in the interior of a vehicle. With fully autonomous driving, the driver can, for example, leave the position behind the steering wheel and take a seated position facing backward. Since autonomous and non-autonomous vehicles will share the same road network for the foreseeable future, accidents cannot be avoided, which makes the use of passive safety systems indispensable. With JENOPTIK-VOTAN® A technology, the trend towards flexible predetermined airbag weakening lines is enabled. With the help of laser beams, the predetermined weakening lines are introduced from the backside of the components so that they are absolutely invisible. This machining process is sensor-controlled and guarantees that a small residual wall thickness remains for the best quality and reliability for airbag weakening lines. Due to the wide processing range of the laser, the processing of almost all materials is possible. A CO₂ laser is used for many plastics, natural fiber materials, foams, foils and material composites. A femtosecond laser is used for natural materials and textiles that are very heat-sensitive. This laser type has extremely short laser pulses with very high energy densities. Supported by a high-precision and fast movement of the laser beam by a laser scanner system, the so-called cold ablation is enabled to predetermine weakening lines layer by layer until the desired residual wall thickness remains. In that way, for example, genuine leather can be processed in a material-friendly and process-reliable manner without design implications to the components A-Side. Passive safety in the vehicle is increased through the interaction of modern airbag technology and high-precision laser airbag weakening. The JENOPTIK-VOTAN® A product family has been representing this for more than 25 years and is pointing the way to the future with new and innovative technologies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=design%20freedom" title="design freedom">design freedom</a>, <a href="https://publications.waset.org/abstracts/search?q=interior%20material%20processing" title=" interior material processing"> interior material processing</a>, <a href="https://publications.waset.org/abstracts/search?q=laser%20technology" title=" laser technology"> laser technology</a>, <a href="https://publications.waset.org/abstracts/search?q=passive%20safety" title=" passive safety"> passive safety</a> </p> <a href="https://publications.waset.org/abstracts/157323/flexible-integration-of-airbag-weakening-lines-in-interior-components-airbag-weakening-with-jenoptik-laser-technology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157323.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">121</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18277</span> Terrestrial Laser Scans to Assess Aerial LiDAR Data</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20F.%20Reinoso-Gordo">J. F. Reinoso-Gordo</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20J.%20Ariza-L%C3%B3pez"> F. J. Ariza-López</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Mozas-Calvache"> A. Mozas-Calvache</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20L.%20Garc%C3%ADa-Balboa"> J. L. García-Balboa</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Eddargani"> S. Eddargani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The DEMs quality may depend on several factors such as data source, capture method, processing type used to derive them, or the cell size of the DEM. The two most important capture methods to produce regional-sized DEMs are photogrammetry and LiDAR; DEMs covering entire countries have been obtained with these methods. The quality of these DEMs has traditionally been evaluated by the national cartographic agencies through punctual sampling that focused on its vertical component. For this type of evaluation there are standards such as NMAS and ASPRS Positional Accuracy Standards for Digital Geospatial Data. However, it seems more appropriate to carry out this evaluation by means of a method that takes into account the superficial nature of the DEM and, therefore, its sampling is superficial and not punctual. This work is part of the Research Project "Functional Quality of Digital Elevation Models in Engineering" where it is necessary to control the quality of a DEM whose data source is an experimental LiDAR flight with a density of 14 points per square meter to which we call Point Cloud Product (PCpro). In the present work it is described the capture data on the ground and the postprocessing tasks until getting the point cloud that will be used as reference (PCref) to evaluate the PCpro quality. Each PCref consists of a patch 50x50 m size coming from a registration of 4 different scan stations. The area studied was the Spanish region of Navarra that covers an area of 10,391 km2; 30 patches homogeneously distributed were necessary to sample the entire surface. The patches have been captured using a Leica BLK360 terrestrial laser scanner mounted on a pole that reached heights of up to 7 meters; the position of the scanner was inverted so that the characteristic shadow circle does not exist when the scanner is in direct position. To ensure that the accuracy of the PCref is greater than that of the PCpro, the georeferencing of the PCref has been carried out with real-time GNSS, and its accuracy positioning was better than 4 cm; this accuracy is much better than the altimetric mean square error estimated for the PCpro (<15 cm); The kind of DEM of interest is the corresponding to the bare earth, so that it was necessary to apply a filter to eliminate vegetation and auxiliary elements such as poles, tripods, etc. After the postprocessing tasks the PCref is ready to be compared with the PCpro using different techniques: cloud to cloud or after a resampling process DEM to DEM. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=data%20quality" title="data quality">data quality</a>, <a href="https://publications.waset.org/abstracts/search?q=DEM" title=" DEM"> DEM</a>, <a href="https://publications.waset.org/abstracts/search?q=LiDAR" title=" LiDAR"> LiDAR</a>, <a href="https://publications.waset.org/abstracts/search?q=terrestrial%20laser%20scanner" title=" terrestrial laser scanner"> terrestrial laser scanner</a>, <a href="https://publications.waset.org/abstracts/search?q=accuracy" title=" accuracy"> accuracy</a> </p> <a href="https://publications.waset.org/abstracts/148417/terrestrial-laser-scans-to-assess-aerial-lidar-data" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/148417.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">100</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18276</span> The Laser Line Detection for Autonomous Mapping Based on Color Segmentation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pavel%20Chmelar">Pavel Chmelar</a>, <a href="https://publications.waset.org/abstracts/search?q=Martin%20Dobrovolny"> Martin Dobrovolny</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Laser projection or laser footprint detection is today widely used in many fields of robotics, measurement, or electronics. The system accuracy strictly depends on precise laser footprint detection on target objects. This article deals with the laser line detection based on the RGB segmentation and the component labeling. As a measurement device was used the developed optical rangefinder. The optical rangefinder is equipped with vertical sweeping of the laser beam and high quality camera. This system was developed mainly for automatic exploration and mapping of unknown spaces. In the first section is presented a new detection algorithm. In the second section are presented measurements results. The measurements were performed in variable light conditions in interiors. The last part of the article present achieved results and their differences between day and night measurements. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=color%20segmentation" title="color segmentation">color segmentation</a>, <a href="https://publications.waset.org/abstracts/search?q=component%20labelling" title=" component labelling"> component labelling</a>, <a href="https://publications.waset.org/abstracts/search?q=laser%20line%20detection" title=" laser line detection"> laser line detection</a>, <a href="https://publications.waset.org/abstracts/search?q=automatic%20mapping" title=" automatic mapping"> automatic mapping</a>, <a href="https://publications.waset.org/abstracts/search?q=distance%20measurement" title=" distance measurement"> distance measurement</a>, <a href="https://publications.waset.org/abstracts/search?q=vector%20map" title=" vector map"> vector map</a> </p> <a href="https://publications.waset.org/abstracts/1789/the-laser-line-detection-for-autonomous-mapping-based-on-color-segmentation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1789.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">432</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18275</span> A Study on Improvement of the Electromagnetic Vibration of a Polygon Mirror Scanner Motor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yongmin%20You">Yongmin You</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Electric machines for office automation device such as printer and scanner have been required the low noise and vibration performance. Many researches about the low noise and vibration of polygon mirror scanner motor have been also progressed. The noise and vibration of polygon mirror scanner motor can be classified by aerodynamic, structural and electromagnetic. Electromagnetic noise and vibration can be occurred by high cogging torque and nonsinusoidal back EMF. To improve the cogging torque and back EMF characteristic, we apply unequal air-gap. To analyze characteristic of a polygon mirror scanner motor, two dimensional finite element method is used. To minimize the cogging torque of a polygon mirror motor, Kriging based on latin hypercube sampling (LHS) is utilized. Compared to the initial model, the torque ripple of the optimized unequal air-gap model was reduced by 23.4 % while maintaining the back EMF and average torque. To verify the optimal design results, the experiment was performed. We measured the vibration in motors at 23,600 rpm which is the rated velocity. The radial and axial gravitational acceleration of the optimal model were declined more than seven times and three times, respectively. From these results, a shape optimized unequal polygon mirror scanner motor has shown the usefulness of an improvement in the torque ripple and electromagnetic vibration characteristic. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=polygon%20mirror%20scanner%20motor" title="polygon mirror scanner motor">polygon mirror scanner motor</a>, <a href="https://publications.waset.org/abstracts/search?q=optimal%20design" title=" optimal design"> optimal design</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20method" title=" finite element method"> finite element method</a>, <a href="https://publications.waset.org/abstracts/search?q=vibration" title=" vibration"> vibration</a> </p> <a href="https://publications.waset.org/abstracts/64401/a-study-on-improvement-of-the-electromagnetic-vibration-of-a-polygon-mirror-scanner-motor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/64401.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">342</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18274</span> Evaluation of Uniformity for Gafchromic Sheets for Film Dosimetry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fayzan%20Ahmed">Fayzan Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Saad%20Bin%20Saeed"> Saad Bin Saeed</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdul%20Qadir%20Jangda"> Abdul Qadir Jangda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Gafchromic™ sheet are extensively used for the QA of intensity modulated radiation therapy and other in-vivo dosimetry. Intra-sheet Non-uniformity of scanner as well as film causes undesirable fluctuations which are reflected in dosimetry The aim of this study is to define a systematic and robust method to investigate the intra-sheet uniformity of the unexposed Gafchromic Sheets and the region of interest (ROI) of the scanner. Sheets of lot No#: A05151201 were scanned before and after the expiry period with the EPSON™ XL10000 scanner in the transmission mode, landscape orientation and 72 dpi resolution. ROI of (8’x 10’ inches) equal to the sheet dimension in the center of the scanner is used to acquire images with full transmission, block transmission and with sheets in place. 500 virtual grids, created in MATALB® are imported as a macros in ImageJ (1.49m Wayne Rasband) to analyze the images. In order to remove the edge effects, the outer 86 grids are excluded from the analysis. The standard deviation of the block transmission and full transmission are 0.38% and 0.66% confirming a higher uniformity of the scanner. Expired and non-expired sheets have standard deviations of 2.18% and 1.29%, show that uniformity decreases after expiry. The results are promising and indicates a good potential of this method to be used as a uniformity check for scanner and unexposed Gafchromic sheets. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=IMRT" title="IMRT">IMRT</a>, <a href="https://publications.waset.org/abstracts/search?q=film%20dosimetry" title=" film dosimetry"> film dosimetry</a>, <a href="https://publications.waset.org/abstracts/search?q=virtual%20grids" title=" virtual grids"> virtual grids</a>, <a href="https://publications.waset.org/abstracts/search?q=uniformity" title=" uniformity"> uniformity</a> </p> <a href="https://publications.waset.org/abstracts/24242/evaluation-of-uniformity-for-gafchromic-sheets-for-film-dosimetry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24242.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">492</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18273</span> A Simple Method for Evaluation of Uniformity for Gafchromic Sheets for Film Dosimetry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fayzan%20Ahmed">Fayzan Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Saad%20Bin%20Saeed"> Saad Bin Saeed</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdul%20Qadir%20Jangda"> Abdul Qadir Jangda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Gafchromic™ sheet are extensively used for the QA of intensity modulated radiation therapy and other in-vivo dosimetry. Intra-sheet Non-uniformity of scanner as well as film causes undesirable fluctuations which are reflected in dosimetry The aim of this study is to define a systematic and robust method to investigate the intra-sheet uniformity of the unexposed Gafchromic Sheets and the region of interest (ROI) of the scanner. Sheets of lot No#: A05151201 were scanned before and after the expiry period with the EPSON™ XL10000 scanner in the transmission mode, landscape orientation, and 72 dpi resolution. ROI of (8’x 10’ inches) equal to the sheet dimension in the center of the scanner is used to acquire images with full transmission, block transmission and with sheets in place. 500 virtual grids, created in MATALB® are imported as a macros in ImageJ (1.49m Wayne Rasband) to analyze the images. In order to remove the edge effects, the outer 86 grids are excluded from the analysis. The standard deviation of the block transmission and full transmission are 0.38% and 0.66% confirming a higher uniformity of the scanner. Expired and non-expired sheets have standard deviations of 2.18% and 1.29%, show that uniformity decreases after expiry. The results are promising and indicate a good potential of this method to be used as a uniformity check for scanner and unexposed Gafchromic sheets. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=IMRT" title="IMRT">IMRT</a>, <a href="https://publications.waset.org/abstracts/search?q=film%20dosimetry" title=" film dosimetry"> film dosimetry</a>, <a href="https://publications.waset.org/abstracts/search?q=virtual%20grids" title=" virtual grids"> virtual grids</a>, <a href="https://publications.waset.org/abstracts/search?q=uniformity" title=" uniformity"> uniformity</a> </p> <a href="https://publications.waset.org/abstracts/24115/a-simple-method-for-evaluation-of-uniformity-for-gafchromic-sheets-for-film-dosimetry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24115.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">428</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18272</span> Novel Ferroelectric Properties as Studied by Boson Mean Field Laser Radiation Induced from a Beer Bottle</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tadeus%20Atraskevic">Tadeus Atraskevic</a>, <a href="https://publications.waset.org/abstracts/search?q=Asch%20Dalbajobas"> Asch Dalbajobas</a>, <a href="https://publications.waset.org/abstracts/search?q=Mazahistas%20Pukuotukas"> Mazahistas Pukuotukas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The novel ferroelectric properties appeared in the recent ten years. Many scientists consider them as non-statement science. Nevertheless, many papers are published. The Mean field theory takes an important place in the theory of ferroelectric materials which can be applied for Boson induced laser systems for ‘Star Track’ soldiers. The novel Laser, which was produced in The Vilnius Bambalio University is a ‘now-how’ among other laser systems. The laser can produce power of 30 kW during 15 seconds. Its size and compatibility distinguishes it among other devices and safety gadgets. Scientists of Bambalio University have already patented the device. The most interesting in this innovations is the process of operation. Merely it may be operated through a bottle a beer what makes the measurement so convenient, that an ordinary scientist can process all stuff without significant effort just by taking pleasure by drinking a bottle of beer. Here we would like to report on the laser system and present our unique developments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laser" title="laser">laser</a>, <a href="https://publications.waset.org/abstracts/search?q=boson" title=" boson"> boson</a>, <a href="https://publications.waset.org/abstracts/search?q=ferroelectrics" title=" ferroelectrics"> ferroelectrics</a>, <a href="https://publications.waset.org/abstracts/search?q=mean%20field%20theory" title=" mean field theory"> mean field theory</a> </p> <a href="https://publications.waset.org/abstracts/75540/novel-ferroelectric-properties-as-studied-by-boson-mean-field-laser-radiation-induced-from-a-beer-bottle" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75540.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">174</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18271</span> Co-Registered Identification and Treatment of Skin Tumor with Optical Coherence Tomography-Guided Laser Therapy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bo-Huei%20Huang">Bo-Huei Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chih-Hsun%20Yang"> Chih-Hsun Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Meng-Tsan%20Tsai"> Meng-Tsan Tsai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Optical coherence tomography (OCT) enables to provide advantages of noninvasive imaging, high resolution, and high imaging speed. In this study, we integrated OCT and a CW laser for tumor diagnosis and treatment. The axial and transverse resolutions of the developed OCT system are 3 μm and 1 μm, respectively. The frame rate of OCT system is 30 frames/s. In this study, the tumor cells were implanted into the mice skin and scanned by OCT to observe the morphological and angiographic changes. With OCT imaging, 3D microstructures and skin angiography of mice skin can be simultaneously acquired, which can be utilized for identification of the tumor distribution. Then, the CW laser beam can be accurately controlled to expose on the center of the tumor, according to the OCT results. Moreover, OCT was used to monitor the induced photothermolysis and to evaluate the treatment outcome. The results showed that OCT-guided laser therapy could efficiently improve the treatment outcome and the extra damage induced by CW can be greatly reduced. Such OCT-guided laser therapy system could be a potential tool for dermatological applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=optical%20coherence%20tomography" title="optical coherence tomography">optical coherence tomography</a>, <a href="https://publications.waset.org/abstracts/search?q=laser%20therapy" title=" laser therapy"> laser therapy</a>, <a href="https://publications.waset.org/abstracts/search?q=skin%20tumor" title=" skin tumor"> skin tumor</a>, <a href="https://publications.waset.org/abstracts/search?q=position%20guide" title=" position guide"> position guide</a> </p> <a href="https://publications.waset.org/abstracts/55100/co-registered-identification-and-treatment-of-skin-tumor-with-optical-coherence-tomography-guided-laser-therapy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55100.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">280</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18270</span> Time Efficient Color Coding for Structured-Light 3D Scanner</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Po-Hao%20Huang">Po-Hao Huang</a>, <a href="https://publications.waset.org/abstracts/search?q=Pei-Ju%20Chiang"> Pei-Ju Chiang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The structured light 3D scanner is commonly used for measuring the 3D shape of an object. Through projecting designed light patterns on the object, deformed patterns can be obtained and used for the geometric shape reconstruction. At present, Gray code is the most reliable and commonly used light pattern in the structured light 3D scanner. However, the trade-off between scanning efficiency and accuracy is a long-standing and challenging problem. The design of light patterns plays a significant role in the scanning efficiency and accuracy. Thereby, we proposed a novel encoding method integrating color information and Gray-code to improve the scanning efficiency. We will demonstrate that with the proposed method, the scanning time can be reduced to approximate half of the one needed by Gray-code without reduction of precision. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gray-code" title="gray-code">gray-code</a>, <a href="https://publications.waset.org/abstracts/search?q=structured%20light%20scanner" title=" structured light scanner"> structured light scanner</a>, <a href="https://publications.waset.org/abstracts/search?q=3D%20shape%20acquisition" title=" 3D shape acquisition"> 3D shape acquisition</a>, <a href="https://publications.waset.org/abstracts/search?q=3D%20reconstruction" title=" 3D reconstruction"> 3D reconstruction</a> </p> <a href="https://publications.waset.org/abstracts/33773/time-efficient-color-coding-for-structured-light-3d-scanner" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33773.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">457</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18269</span> Laser Beam Bending via Lenses</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Remzi%20Yildirim">Remzi Yildirim</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatih.%20V.%20%C3%87elebi"> Fatih. V. Çelebi</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Haldun%20G%C3%B6kta%C5%9F"> H. Haldun Göktaş</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Behzat%20%C5%9Eahin"> A. Behzat Şahin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study is about a single component cylindrical structured lens with gradient curve which we used for bending laser beams. It operates under atmospheric conditions and bends the laser beam independent of temperature, pressure, polarity, polarization, magnetic field, electric field, radioactivity, and gravity. A single piece cylindrical lens that can bend laser beams is invented. Lenses are made of transparent, tinted or colored glasses and used for undermining or absorbing the energy of the laser beams. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laser" title="laser">laser</a>, <a href="https://publications.waset.org/abstracts/search?q=bending" title=" bending"> bending</a>, <a href="https://publications.waset.org/abstracts/search?q=lens" title=" lens"> lens</a>, <a href="https://publications.waset.org/abstracts/search?q=light" title=" light"> light</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20optics" title=" nonlinear optics"> nonlinear optics</a> </p> <a href="https://publications.waset.org/abstracts/22254/laser-beam-bending-via-lenses" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22254.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">488</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18268</span> Laser Light Bending via Lenses</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Remzi%20Yildirim">Remzi Yildirim</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatih%20V.%20%C3%87elebi"> Fatih V. Çelebi</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Haldun%20G%C3%B6kta%C5%9F"> H. Haldun Göktaş</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Behzat%20%C5%9Eahin"> A. Behzat Şahin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study is about a single component cylindrical structured lens with gradient curve which we used for bending laser beams. It operates under atmospheric conditions and bends the laser beam independent of temperature, pressure, polarity, polarization, magnetic field, electric field, radioactivity, and gravity. A single piece cylindrical lens that can bend laser beams is invented. Lenses are made of transparent, tinted or colored glasses and used for undermining or absorbing the energy of the laser beams. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laser" title="laser">laser</a>, <a href="https://publications.waset.org/abstracts/search?q=bending" title=" bending"> bending</a>, <a href="https://publications.waset.org/abstracts/search?q=lens" title=" lens"> lens</a>, <a href="https://publications.waset.org/abstracts/search?q=light" title=" light"> light</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20optics" title=" nonlinear optics"> nonlinear optics</a> </p> <a href="https://publications.waset.org/abstracts/22251/laser-light-bending-via-lenses" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22251.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">702</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18267</span> Study on Concentration and Temperature Measurement with 760 nm Diode Laser in Combustion System Using Tunable Diode Laser Absorption Spectroscopy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Miyeon%20Yoo">Miyeon Yoo</a>, <a href="https://publications.waset.org/abstracts/search?q=Sewon%20Kim"> Sewon Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Changyeop%20Lee"> Changyeop Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> It is important to measure the internal temperature or temperature distribution precisely in combustion system to increase energy efficiency and reduce the pollutants. Especially in case of large combustion systems such as power plant boiler and reheating furnace of steel making process, it is very difficult to measure those physical properties in detail. Tunable diode laser absorption spectroscopy measurement and analysis can be attractive method to overcome the difficulty. In this paper, TDLAS methods are used to measure the oxygen concentration and temperature distribution in various experimental conditions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=tunable%20diode%20laser%20absorption%20Spectroscopy" title="tunable diode laser absorption Spectroscopy">tunable diode laser absorption Spectroscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature%20distribution" title=" temperature distribution"> temperature distribution</a>, <a href="https://publications.waset.org/abstracts/search?q=gas%20concentration" title=" gas concentration"> gas concentration</a> </p> <a href="https://publications.waset.org/abstracts/3424/study-on-concentration-and-temperature-measurement-with-760-nm-diode-laser-in-combustion-system-using-tunable-diode-laser-absorption-spectroscopy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3424.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">386</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18266</span> Interferometric Demodulation Scheme Using a Mode-Locker Fiber Laser</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Liang%20Zhang">Liang Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yuanfu%20Lu"> Yuanfu Lu</a>, <a href="https://publications.waset.org/abstracts/search?q=Yuming%20Dong"> Yuming Dong</a>, <a href="https://publications.waset.org/abstracts/search?q=Guohua%20Jiao"> Guohua Jiao</a>, <a href="https://publications.waset.org/abstracts/search?q=Wei%20Chen"> Wei Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Jiancheng%20Lv"> Jiancheng Lv</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We demonstrated an interferometric demodulation scheme using a mode-locked fiber laser. The mode-locked fiber laser is launched into a two-beam interferometer. When the ratio between the fiber path imbalance of interferometer and the laser cavity length is close to an integer, an interferometric fringe emerges as a result of vernier effect, and then the phase shift of the interferometer can be demodulated. The mode-locked fiber laser provides a large bandwidth and reduces the cost for wavelength division multiplexion (WDM). The proposed interferometric demodulation scheme can be further applied in multi-point sensing system such as fiber optics hydrophone array, seismic wave detection network with high sensitivity and low cost. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fiber%20sensing" title="fiber sensing">fiber sensing</a>, <a href="https://publications.waset.org/abstracts/search?q=interferometric%20demodulation" title=" interferometric demodulation"> interferometric demodulation</a>, <a href="https://publications.waset.org/abstracts/search?q=mode-locked%20fiber%20laser" title=" mode-locked fiber laser"> mode-locked fiber laser</a>, <a href="https://publications.waset.org/abstracts/search?q=vernier%20effect" title=" vernier effect"> vernier effect</a> </p> <a href="https://publications.waset.org/abstracts/48278/interferometric-demodulation-scheme-using-a-mode-locker-fiber-laser" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/48278.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">329</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18265</span> Synchronization of Semiconductor Laser Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=R.%20M.%20L%C3%B3pez-Guti%C3%A9rrez">R. M. López-Gutiérrez</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Cardoza-Avenda%C3%B1o"> L. Cardoza-Avendaño</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Cervantes-de%20%C3%81vila"> H. Cervantes-de Ávila</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20A.%20Michel-Macarty"> J. A. Michel-Macarty</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Cruz-Hern%C3%A1ndez"> C. Cruz-Hernández</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Arellano-Delgado"> A. Arellano-Delgado</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Carmona-Rodr%C3%ADguez"> R. Carmona-Rodríguez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, synchronization of multiple chaotic semiconductor lasers is achieved by appealing to complex system theory. In particular, we consider dynamical networks composed by semiconductor laser, as interconnected nodes, where the interaction in the networks are defined by coupling the first state of each node. An interesting case is synchronized with master-slave configuration in star topology. Nodes of these networks are modeled for the laser and simulated by Matlab. These results are applicable to private communication. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chaotic%20laser" title="chaotic laser">chaotic laser</a>, <a href="https://publications.waset.org/abstracts/search?q=network" title=" network"> network</a>, <a href="https://publications.waset.org/abstracts/search?q=star%20topology" title=" star topology"> star topology</a>, <a href="https://publications.waset.org/abstracts/search?q=synchronization" title=" synchronization"> synchronization</a> </p> <a href="https://publications.waset.org/abstracts/34528/synchronization-of-semiconductor-laser-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34528.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">566</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18264</span> Hole Characteristics of Percussion and Single Pulse Laser-Incised Radiata Pine and the Effects of Wood Anatomy on Laser-Incision</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Subhasisa%20Nath">Subhasisa Nath</a>, <a href="https://publications.waset.org/abstracts/search?q=David%20Waugh"> David Waugh</a>, <a href="https://publications.waset.org/abstracts/search?q=Graham%20Ormondroyd"> Graham Ormondroyd</a>, <a href="https://publications.waset.org/abstracts/search?q=Morwenna%20Spear"> Morwenna Spear</a>, <a href="https://publications.waset.org/abstracts/search?q=Andy%20Pitman"> Andy Pitman</a>, <a href="https://publications.waset.org/abstracts/search?q=Paul%20Mason"> Paul Mason</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Wood is one of the most sustainable and environmentally favourable materials and is chemically treated in timber industries to maximise durability. To increase the chemical preservative uptake and retention by the wood, current limiting incision technologies are commonly used. This work reports the effects of single pulse CO2 laser-incision and frequency tripled Nd:YAG percussion laser-incision on the characteristics of laser-incised holes in the Radiata Pine. The laser-incision studies were based on changing laser wavelengths, energies and focal planes to conclude on an optimised combination for the laser-incision of Radiata Pine. The laser pulse duration had a dominant effect over laser power in controlling hole aspect ratio in CO2 laser-incision. A maximum depth of ~ 30 mm was measured with a laser power output of 170 W and a pulse duration of 80 ms. However, increased laser power led to increased carbonisation of holes. The carbonisation effect was reduced during laser-incision in the ultra-violet (UV) regime. Deposition of a foamy phase on the laser-incised hole wall was evident irrespective of laser radiation wavelength and energy. A maximum hole depth of ~20 mm was measured in the percussion laser-incision in the UV regime (355 nm) with a pulse energy of 320 mJ. The radial and tangential faces had a significant effect on laser-incision efficiency for all laser wavelengths. The laser-incised hole shapes and circularities were affected by the wood anatomy (earlywoods and latewoods in the structure). Subsequently, the mechanism of laser-incision is proposed by analysing the internal structure of laser-incised holes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CO2%20Laser" title="CO2 Laser">CO2 Laser</a>, <a href="https://publications.waset.org/abstracts/search?q=Nd%3A%20YAG%20laser" title=" Nd: YAG laser"> Nd: YAG laser</a>, <a href="https://publications.waset.org/abstracts/search?q=incision" title=" incision"> incision</a>, <a href="https://publications.waset.org/abstracts/search?q=drilling" title=" drilling"> drilling</a>, <a href="https://publications.waset.org/abstracts/search?q=wood" title=" wood"> wood</a>, <a href="https://publications.waset.org/abstracts/search?q=hole%20characteristics" title=" hole characteristics"> hole characteristics</a> </p> <a href="https://publications.waset.org/abstracts/138450/hole-characteristics-of-percussion-and-single-pulse-laser-incised-radiata-pine-and-the-effects-of-wood-anatomy-on-laser-incision" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/138450.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">241</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=laser%20scanner%20system&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=laser%20scanner%20system&page=3">3</a></li> <li class="page-item"><a class="page-link" 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