Pub Date : 2014-04-17DOI: 10.1109/SAS.2014.6798950
B. Andò, S. Baglio, A. Beninato, C. Jenkins, A. Bulsara, T. Emery, V. Palkar
Multiferroic materials represent a very attractive class of materials due to the coupling between their electric and magnetic orders. A recent paper has demonstrated that a thin film of BDFO shows a good magnetoelectric coupling. Based on such a peculiarity, multiferroic composites can be successfully used to realize sensors of both electric and magnetic fields. This work reports two different ways to realize an E-field and B-field sensor with a thin layer of BDFO. The first approach shows as a single multiferroic device can be used as sensor, while the second approach exploits a coupled system made by three multiferroic devices. The multiferroic device models are presented together with the electronic circuits used in the simulations.
{"title":"A coupled nonlinear circuit for E-field and B-field detection","authors":"B. Andò, S. Baglio, A. Beninato, C. Jenkins, A. Bulsara, T. Emery, V. Palkar","doi":"10.1109/SAS.2014.6798950","DOIUrl":"https://doi.org/10.1109/SAS.2014.6798950","url":null,"abstract":"Multiferroic materials represent a very attractive class of materials due to the coupling between their electric and magnetic orders. A recent paper has demonstrated that a thin film of BDFO shows a good magnetoelectric coupling. Based on such a peculiarity, multiferroic composites can be successfully used to realize sensors of both electric and magnetic fields. This work reports two different ways to realize an E-field and B-field sensor with a thin layer of BDFO. The first approach shows as a single multiferroic device can be used as sensor, while the second approach exploits a coupled system made by three multiferroic devices. The multiferroic device models are presented together with the electronic circuits used in the simulations.","PeriodicalId":125872,"journal":{"name":"2014 IEEE Sensors Applications Symposium (SAS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124146179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-04-17DOI: 10.1109/SAS.2014.6798912
S. Griffin, T. Wyatt
A solar panel based sensor for automatic recording of practical insolation data at North Latitude 35.122196° and West Longitude -89.934553° has been developed. To implement this, a detailed, application oriented, solar panel model has been tested. This modeling has been divided into categories based on both technological characteristics such as cell and panel construction and disciple orientation such as thermal, electrical, optical, and mechanical. Emphasis has been on performance at maximum collection efficiency. This document addresses efficiency from the electrical output side rather than the optical input side. Emphasis is on effective coupling to load, balanced against collection efficiencies, so that sensor calibration constant is nearly constant. Partial obscuration and cost impacts are addressed.
{"title":"Solar panel sensor modeling and fiscal modeling","authors":"S. Griffin, T. Wyatt","doi":"10.1109/SAS.2014.6798912","DOIUrl":"https://doi.org/10.1109/SAS.2014.6798912","url":null,"abstract":"A solar panel based sensor for automatic recording of practical insolation data at North Latitude 35.122196° and West Longitude -89.934553° has been developed. To implement this, a detailed, application oriented, solar panel model has been tested. This modeling has been divided into categories based on both technological characteristics such as cell and panel construction and disciple orientation such as thermal, electrical, optical, and mechanical. Emphasis has been on performance at maximum collection efficiency. This document addresses efficiency from the electrical output side rather than the optical input side. Emphasis is on effective coupling to load, balanced against collection efficiencies, so that sensor calibration constant is nearly constant. Partial obscuration and cost impacts are addressed.","PeriodicalId":125872,"journal":{"name":"2014 IEEE Sensors Applications Symposium (SAS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129829541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-04-17DOI: 10.1109/SAS.2014.6798920
Andre Schwarzmeier, J. Besser, R. Weigel, G. Fischer, D. Kissinger
This paper presents a compact and highly integrated back-plaster sensor node equipped with seamless localization (in-door and out-door) based on assisted GPS and Bluetooth localization, activity classification and fall detection as well as a GSM module providing a GPRS connection to a server infrastructure for supporting dementia and Alzheimer patients in their daily life. The innovative and durable design as a hermetically rubber-sealed, waterproof and sanitizable back-plaster ensures optimum wearing comfort for the patient as well as reliable fall detection. In addition, combined with an internet server infrastructure the described plaster sensor node allows informing relatives or professional care in case of an emergency and help to enhance the quality of life by increasing patient's feeling of security.
{"title":"A compact back-plaster sensor node for dementia and Alzheimer patient care","authors":"Andre Schwarzmeier, J. Besser, R. Weigel, G. Fischer, D. Kissinger","doi":"10.1109/SAS.2014.6798920","DOIUrl":"https://doi.org/10.1109/SAS.2014.6798920","url":null,"abstract":"This paper presents a compact and highly integrated back-plaster sensor node equipped with seamless localization (in-door and out-door) based on assisted GPS and Bluetooth localization, activity classification and fall detection as well as a GSM module providing a GPRS connection to a server infrastructure for supporting dementia and Alzheimer patients in their daily life. The innovative and durable design as a hermetically rubber-sealed, waterproof and sanitizable back-plaster ensures optimum wearing comfort for the patient as well as reliable fall detection. In addition, combined with an internet server infrastructure the described plaster sensor node allows informing relatives or professional care in case of an emergency and help to enhance the quality of life by increasing patient's feeling of security.","PeriodicalId":125872,"journal":{"name":"2014 IEEE Sensors Applications Symposium (SAS)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120918452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-04-17DOI: 10.1109/SAS.2014.6798941
Ran Chen, Wei-ting Liu, Xin Fu, P. Dario
This paper reports a hydrogen gas sensor based on palladium-decorated polyurethane nanofibers which can be easily fabricated through electrospinning, sputtering, gap generating and adjusting. Extremely narrow gaps between palladium nanostructures with width about 12nm are obtained through stretching aided hydrogen gas exposure and adjusted through further stretching which modulates measurement range and sensitivity of the sensor. This sensor performs a good and fast response (with response time less than 5s and recovery time less than 10s) to hydrogen gas of low concentrations with a good sensitivity and linearity in narrow range (with max sensitivity about 0.32% per ppm in relative resistance change and span less than 100ppm) and a fairly low limit-of-detection (which can be below 50ppm). Therefore, the sensor is suitable for hydrogen gas leak detection.
{"title":"An easy-fabricated hydrogen gas sensor based on palladium-decorated polyurethane nanofibers","authors":"Ran Chen, Wei-ting Liu, Xin Fu, P. Dario","doi":"10.1109/SAS.2014.6798941","DOIUrl":"https://doi.org/10.1109/SAS.2014.6798941","url":null,"abstract":"This paper reports a hydrogen gas sensor based on palladium-decorated polyurethane nanofibers which can be easily fabricated through electrospinning, sputtering, gap generating and adjusting. Extremely narrow gaps between palladium nanostructures with width about 12nm are obtained through stretching aided hydrogen gas exposure and adjusted through further stretching which modulates measurement range and sensitivity of the sensor. This sensor performs a good and fast response (with response time less than 5s and recovery time less than 10s) to hydrogen gas of low concentrations with a good sensitivity and linearity in narrow range (with max sensitivity about 0.32% per ppm in relative resistance change and span less than 100ppm) and a fairly low limit-of-detection (which can be below 50ppm). Therefore, the sensor is suitable for hydrogen gas leak detection.","PeriodicalId":125872,"journal":{"name":"2014 IEEE Sensors Applications Symposium (SAS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134025518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-04-17DOI: 10.1109/SAS.2014.6798954
N. Wagner, F. Daschner, A. Scheuermann, Moritz Schwing
The frequency dependence of dielectric material properties of water saturated and unsaturated porous materials such as soil is not only disturbing in applications with high frequency electromagnetic (HF-EM) techniques but also contains valuable information of the material due to strong contributions by interactions between the aqueous pore solution and mineral phases. Hence, broadband HF-EM sensor techniques enable the estimation of soil physico-chemical parameters such as water content, texture, mineralogy, cation exchange capacity and matric potential. In this context, a multivariate (MV) approach was applied to estimate the Soil Water Characteristic Curve (SWCC) from experimentally determined dielectric relaxation spectra of a silty clay soil. The results of the MV-approach were compared with results obtained from empirical equations and theoretical models as well as a novel hydraulic/electromagnetic coupling approach. The applied MV-approach gives evidence, (i) of a physical relationship between soil dielectric relaxation behavior and soil water characteristics as an important hydraulic material property and (ii) the applicability of appropriate sensor techniques for the estimation of physico-chemical parameters of porous media from broadband measured dielectric spectra.
{"title":"Estimation of the Soil Water Characteristics from dielectric relaxation spectra","authors":"N. Wagner, F. Daschner, A. Scheuermann, Moritz Schwing","doi":"10.1109/SAS.2014.6798954","DOIUrl":"https://doi.org/10.1109/SAS.2014.6798954","url":null,"abstract":"The frequency dependence of dielectric material properties of water saturated and unsaturated porous materials such as soil is not only disturbing in applications with high frequency electromagnetic (HF-EM) techniques but also contains valuable information of the material due to strong contributions by interactions between the aqueous pore solution and mineral phases. Hence, broadband HF-EM sensor techniques enable the estimation of soil physico-chemical parameters such as water content, texture, mineralogy, cation exchange capacity and matric potential. In this context, a multivariate (MV) approach was applied to estimate the Soil Water Characteristic Curve (SWCC) from experimentally determined dielectric relaxation spectra of a silty clay soil. The results of the MV-approach were compared with results obtained from empirical equations and theoretical models as well as a novel hydraulic/electromagnetic coupling approach. The applied MV-approach gives evidence, (i) of a physical relationship between soil dielectric relaxation behavior and soil water characteristics as an important hydraulic material property and (ii) the applicability of appropriate sensor techniques for the estimation of physico-chemical parameters of porous media from broadband measured dielectric spectra.","PeriodicalId":125872,"journal":{"name":"2014 IEEE Sensors Applications Symposium (SAS)","volume":"12 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131437869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-04-17DOI: 10.1109/SAS.2014.6798916
René Bergelt, M. Vodel, W. Hardt
The development of wireless sensor networks has reached a point where each individual node of a network may store and deliver a massive amount of (sensor-based) information at once or over time. In the future, massively connected, highly dynamic wireless sensor networks such as vehicle-2-vehicle communication scenarios may hold an even greater information potential. This is mostly due to the increase in node complexity. Consequently, data volumes will become a problem for traditional data aggregation strategies traffic-wise as well as with regard to energy efficiency. Therefore, in this paper we suggest to call such scenarios big data scenarios as they pose similar questions and problems as traditional big data scenarios. Although the latter focus mostly on business intelligence problems. We then propose an aggregation strategy tied to technological prerequisites which enables the efficient use of energy and the handling of large data volumes. Furthermore, we demonstrate the energy conservation potential based on experiments with actual sensor platforms.
{"title":"Energy efficient handling of big data in embedded, wireless sensor networks","authors":"René Bergelt, M. Vodel, W. Hardt","doi":"10.1109/SAS.2014.6798916","DOIUrl":"https://doi.org/10.1109/SAS.2014.6798916","url":null,"abstract":"The development of wireless sensor networks has reached a point where each individual node of a network may store and deliver a massive amount of (sensor-based) information at once or over time. In the future, massively connected, highly dynamic wireless sensor networks such as vehicle-2-vehicle communication scenarios may hold an even greater information potential. This is mostly due to the increase in node complexity. Consequently, data volumes will become a problem for traditional data aggregation strategies traffic-wise as well as with regard to energy efficiency. Therefore, in this paper we suggest to call such scenarios big data scenarios as they pose similar questions and problems as traditional big data scenarios. Although the latter focus mostly on business intelligence problems. We then propose an aggregation strategy tied to technological prerequisites which enables the efficient use of energy and the handling of large data volumes. Furthermore, we demonstrate the energy conservation potential based on experiments with actual sensor platforms.","PeriodicalId":125872,"journal":{"name":"2014 IEEE Sensors Applications Symposium (SAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131326840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-04-17DOI: 10.1109/SAS.2014.6798928
N. Khanh, T. Iizuka, Akihiko Sasaki, M. Yamada, O. Morita, K. Asada
This paper presents a high-resolution magnetic measurement for detecting vulnerable and suspicious areas on cryptography LSI chips. A CMOS 3-stage low-noise amplifier is integrated with a 500-μm×100-μm magnetic pick-up coil to amplify the induced voltage of the coil. Moreover, the Si-substrate area underneath the coil is removed by applying a Focused-Ion-Beam technique to enhance the coil's performance. High resolution magnetic scanning measurements in a shielded box are performed on both a micro-strip line and a cryptography LSI. By making a comparison with a commercial probe, this measurement holds the advantage that higher-resolution magnetic maps in multiple frequency bands and more revealed information can be achieved.
{"title":"High-resolution measurement of magnetic field generated from cryptographic LSIs","authors":"N. Khanh, T. Iizuka, Akihiko Sasaki, M. Yamada, O. Morita, K. Asada","doi":"10.1109/SAS.2014.6798928","DOIUrl":"https://doi.org/10.1109/SAS.2014.6798928","url":null,"abstract":"This paper presents a high-resolution magnetic measurement for detecting vulnerable and suspicious areas on cryptography LSI chips. A CMOS 3-stage low-noise amplifier is integrated with a 500-μm×100-μm magnetic pick-up coil to amplify the induced voltage of the coil. Moreover, the Si-substrate area underneath the coil is removed by applying a Focused-Ion-Beam technique to enhance the coil's performance. High resolution magnetic scanning measurements in a shielded box are performed on both a micro-strip line and a cryptography LSI. By making a comparison with a commercial probe, this measurement holds the advantage that higher-resolution magnetic maps in multiple frequency bands and more revealed information can be achieved.","PeriodicalId":125872,"journal":{"name":"2014 IEEE Sensors Applications Symposium (SAS)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123570025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-04-17DOI: 10.1109/SAS.2014.6798917
Stephan Blokzyl, M. Vodel, W. Hardt
Systems for aerial vehicles have to face tight constraints on weight, space, and energy consumption due to limited payload and energy resources of aircrafts. This leads to the use of optimised, application-specific components. In exploration and surveillance scenarios, electro-optical (EO) sensors in combination with embedded systems are very suitable to contribute to various perception tasks. EO sensors are lightweight, affordable and provide a high-quality representation of vehicle's environment. Embedded systems are energy-efficient, space-saving and provide powerful computing capabilities. But processing of high-resolution images is challenging, especially in the context of embedded computing and real-time data exploitation. Considering these conditions, the article introduces a novel FPGA-based approach for runway boundary recognition. The source image is scanned line-by-line to identify colour variations. Locations with strong colour discontinuity are grouped to lines which are used for runway pattern extraction in image. The classifier-less approach is independent from runway colour, brightness and contrast and doesn't require additional markers. The final detection is evaluated by a confidence value indicating its trustiness. The determinability of the worst case execution time and the robustness over a wide dynamic range demonstrate the certifiability of the implementation. It will be tested on an unmanned aerial vehicle for automated landing.
{"title":"FPGA-based approach for runway boundary detection in high-resolution colour images","authors":"Stephan Blokzyl, M. Vodel, W. Hardt","doi":"10.1109/SAS.2014.6798917","DOIUrl":"https://doi.org/10.1109/SAS.2014.6798917","url":null,"abstract":"Systems for aerial vehicles have to face tight constraints on weight, space, and energy consumption due to limited payload and energy resources of aircrafts. This leads to the use of optimised, application-specific components. In exploration and surveillance scenarios, electro-optical (EO) sensors in combination with embedded systems are very suitable to contribute to various perception tasks. EO sensors are lightweight, affordable and provide a high-quality representation of vehicle's environment. Embedded systems are energy-efficient, space-saving and provide powerful computing capabilities. But processing of high-resolution images is challenging, especially in the context of embedded computing and real-time data exploitation. Considering these conditions, the article introduces a novel FPGA-based approach for runway boundary recognition. The source image is scanned line-by-line to identify colour variations. Locations with strong colour discontinuity are grouped to lines which are used for runway pattern extraction in image. The classifier-less approach is independent from runway colour, brightness and contrast and doesn't require additional markers. The final detection is evaluated by a confidence value indicating its trustiness. The determinability of the worst case execution time and the robustness over a wide dynamic range demonstrate the certifiability of the implementation. It will be tested on an unmanned aerial vehicle for automated landing.","PeriodicalId":125872,"journal":{"name":"2014 IEEE Sensors Applications Symposium (SAS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124284859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-04-17DOI: 10.1109/SAS.2014.6798919
D. Basu, G. S. Gupta, G. Moretti, X. Gui
This paper proposes a modified communication protocol that uses the knowledge of channel states to transmit packets. It shuts off the energy expensive acknowledgement operation during good channel state while uses all its retransmission attempts in bad channel state to deliver the packets through the channel. The impact of this protocol has been directly studied on the coin cell batteries that are used to power wireless sensors by emulating the loads for the battery and radio channel conditions. The radio channel is modeled as two state Markov chain with FAVORABLE and NON-FAVORABLE states. Three different channel conditions - good, bad and uncertain - are considered based on how often they transit between the FAVORABLE and NON-FAVORABLE states. The results have been compared with a classical communication protocol where communication between nodes takes place on send-acknowledge basis with a fixed number of retransmission attempts when error occurs. Our proposed protocol shows promising improvement in battery lifetime when dealing with good channel and found to be more effective in the other two channel conditions when the receive operation time is high. Analytical results are also used to substantiate our observations.
{"title":"Investigation into the impact of protocol design on energy consumption of low power wireless sensors","authors":"D. Basu, G. S. Gupta, G. Moretti, X. Gui","doi":"10.1109/SAS.2014.6798919","DOIUrl":"https://doi.org/10.1109/SAS.2014.6798919","url":null,"abstract":"This paper proposes a modified communication protocol that uses the knowledge of channel states to transmit packets. It shuts off the energy expensive acknowledgement operation during good channel state while uses all its retransmission attempts in bad channel state to deliver the packets through the channel. The impact of this protocol has been directly studied on the coin cell batteries that are used to power wireless sensors by emulating the loads for the battery and radio channel conditions. The radio channel is modeled as two state Markov chain with FAVORABLE and NON-FAVORABLE states. Three different channel conditions - good, bad and uncertain - are considered based on how often they transit between the FAVORABLE and NON-FAVORABLE states. The results have been compared with a classical communication protocol where communication between nodes takes place on send-acknowledge basis with a fixed number of retransmission attempts when error occurs. Our proposed protocol shows promising improvement in battery lifetime when dealing with good channel and found to be more effective in the other two channel conditions when the receive operation time is high. Analytical results are also used to substantiate our observations.","PeriodicalId":125872,"journal":{"name":"2014 IEEE Sensors Applications Symposium (SAS)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127353799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-02-01DOI: 10.1109/SAS.2014.6798960
B. Chung, Yoon-Chang Park, Jin-Yeong Do
In a three-dimensional(3-D) measurement system based on a digital light processing (DLP) projector and a camera, a height estimating function is proposed based on geometric analysis. The proposed 3-D shape measurement method is a hybrid method that combines the geometric parameter measuring method and the least squares method. This method uses the phase-to-height relationship for one line by plane analysis, and the related parameters are estimated using the least squares method. Sinusoidal fringe patterns of the projector are projected on the object, and the phase of the measuring point is calculated from the camera image. Then, the relationship between the phase by fringe patterns and the height of the measuring point is described as a parameter of the horizontal coordinate on the image plane. Thus, the 3-D shape of the object can be obtained. Our experiments show that the modeling errors for the given x-z plane are within ±0.1 mm. The model for the entire working space can be represented by several plane models because all the x-z plane models along the y-axis are nearly the same. Therefore, the proposed method can dramatically reduce the number of mapping functions needed for 3-D measurement.
{"title":"Phase-height relationship by plane analysis in 3D shape measurement using fringe pattern projector","authors":"B. Chung, Yoon-Chang Park, Jin-Yeong Do","doi":"10.1109/SAS.2014.6798960","DOIUrl":"https://doi.org/10.1109/SAS.2014.6798960","url":null,"abstract":"In a three-dimensional(3-D) measurement system based on a digital light processing (DLP) projector and a camera, a height estimating function is proposed based on geometric analysis. The proposed 3-D shape measurement method is a hybrid method that combines the geometric parameter measuring method and the least squares method. This method uses the phase-to-height relationship for one line by plane analysis, and the related parameters are estimated using the least squares method. Sinusoidal fringe patterns of the projector are projected on the object, and the phase of the measuring point is calculated from the camera image. Then, the relationship between the phase by fringe patterns and the height of the measuring point is described as a parameter of the horizontal coordinate on the image plane. Thus, the 3-D shape of the object can be obtained. Our experiments show that the modeling errors for the given x-z plane are within ±0.1 mm. The model for the entire working space can be represented by several plane models because all the x-z plane models along the y-axis are nearly the same. Therefore, the proposed method can dramatically reduce the number of mapping functions needed for 3-D measurement.","PeriodicalId":125872,"journal":{"name":"2014 IEEE Sensors Applications Symposium (SAS)","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116546973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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