{"title":"Online measurement of cornea deformation during non-contact tonometry","authors":"T. Krijger, M. Kaneko","doi":"10.1109/ICSENS.2011.6127401","DOIUrl":"https://doi.org/10.1109/ICSENS.2011.6127401","url":null,"abstract":"A novel method to achieve online measurements of cornea deformation during non-contact tonometry by use of an online camera system is presented. Kaneko et al. have shown that non-contact tonometry as a method of identifying the intraocular pressure can produce biased results due to differences in structural eye stiffness between individuals. By including deformation measurements of the cornea, results can be greatly improved. An experimental set-up was created implementing an online camera system to allow for real time measurement of cornea deformation. Initial results using the improved setup decreased analysis time from the initial 30 minutes using the offline system to less than one minute using the online system.","PeriodicalId":201386,"journal":{"name":"2011 IEEE SENSORS Proceedings","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124774179","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}
D. Rabus, T. Baron, S. Alzuaga, G. Martin, S. Ballandras, J. Friedt
{"title":"Novel narrowband acoustic sensors for sub-GHz wireless measurements","authors":"D. Rabus, T. Baron, S. Alzuaga, G. Martin, S. Ballandras, J. Friedt","doi":"10.1109/ICSENS.2011.6127126","DOIUrl":"https://doi.org/10.1109/ICSENS.2011.6127126","url":null,"abstract":"High-overtone Bulk Acoustic Resonator is an acoustic transducer based on an excitation of a bulk acoustic wave by a thin piezoelectric film bonded to a thick low acoustic loss substrate. This combination of materials aims at providing on the one hand a high frequency transducer as defined by the thickness of the thin piezoelectric layer, and on the other hand the robustness of a thick substrate while keeping the acoustic properties of single crystal piezoelectric materials. More specifically, this architecture provides high quality factors using bulk acoustic wave at frequencies only accessible to surface acoustic wave (SAW) devices with interdigitated transducer generation. The multimode spectrum is well suited for an openloop, wireless interrogation strategy in which the frequency of the incoming electromagnetic wave defines the operating point. We here demonstrate the use of a frequency sweep RADAR-like network analyzer for probing through a wireless link HBARs with different temperature coefficients in order to perform temperature measurements insensitive to other correlated noise sources (capacitive frequency pulling, electrode aging, stress).","PeriodicalId":201386,"journal":{"name":"2011 IEEE SENSORS Proceedings","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124781708","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}
K. Mayekar, M. Gottwald, G. von der Emde, D. Damalla, H. Bousack
{"title":"Characterization of a bionic electrolocation sensor using finite element modeling","authors":"K. Mayekar, M. Gottwald, G. von der Emde, D. Damalla, H. Bousack","doi":"10.1109/ICSENS.2011.6127208","DOIUrl":"https://doi.org/10.1109/ICSENS.2011.6127208","url":null,"abstract":"In this paper, a novel bionic 17-electrode catheter sensor is introduced, which can be used for coronary diagnostics. The sensor was characterized by finite element modeling using the multiphysics software COMSOL. In addition, the sensor was used to measure a small spherical metal or plastic target protruding into a Plexiglas tubing representing an artery and a plaque, respectively. Both approaches showed that it is possible to detect and localize an object in the tube wall and discriminate between metal and plastic objects.","PeriodicalId":201386,"journal":{"name":"2011 IEEE SENSORS Proceedings","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130325207","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}
Ning Xue, Jeong‐Bong Lee, S. Foland, Sung-Pil Chang
{"title":"Biocompatible polymeric wireless pressure sensor for intraocular pressure sensing application","authors":"Ning Xue, Jeong‐Bong Lee, S. Foland, Sung-Pil Chang","doi":"10.1109/ICSENS.2011.6127005","DOIUrl":"https://doi.org/10.1109/ICSENS.2011.6127005","url":null,"abstract":"Telemetric sensing is a promising method to accomplish non-contact and continuous disease diagnoses. Implantable intraocular pressure (IOP) sensor using wireless telemetric technology is highly desirable. This paper presents a fully integrated SU-8-based passive wireless inductively-coupled pressure sensor, especially designed for IOP sensor. The sensor was microfabricated using biocompatible materials - gold and SU-8 - to form the LC parallel circuit and the pressure sensitive diaphragm. Multi-SU-8-layers were stacked to completely isolate the working circuit from the biological tissue medium. The characterization result of IOP sensor shows that it has relatively high responsivity (683 KHz/mmHg) in the pressure range of 0 – 60 mmHg and has pressure resolution much lower than 1 mmHg in both air and saline medium.","PeriodicalId":201386,"journal":{"name":"2011 IEEE SENSORS Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130530831","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}
{"title":"A step towards the prediction of a rock collapse: analysis of micro-acoustic bursts","authors":"C. Alippi, G. Boracchi, A. Marullo, M. Roveri","doi":"10.1109/ICSENS.2011.6127161","DOIUrl":"https://doi.org/10.1109/ICSENS.2011.6127161","url":null,"abstract":"Forecasting collapses in a rock face is still an unresolved issue due to the lack of clearly noticeable forerunners. However, technological advances carried out in our research group have made possible the acquisition of micro-acoustic emissions induced by the enlargement of cracks in the rock. At the same time, both the geological literature and evidence propose an evolutionary model for the burst spectrum, which is expected to shrink towards low frequencies once getting closer to the rock collapse. Bursts, acquired through accelerometers sampled at 2kHz, need to be suitably processed to remove outliers and false positives, before any forecast action can be envisaged. For the first time we are in possess of a dataset of micro-acoustic emissions acquired by our systems on the Alps. These signals have been analyzed through a computational intelligence approach, to interpret and classify them in bursts associated with proper fractures in the rock or false alarms (e.g., due to stone falls, and outliers).","PeriodicalId":201386,"journal":{"name":"2011 IEEE SENSORS Proceedings","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126707385","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}
{"title":"Biomimetic sonar, outer ears versus arrays","authors":"J. Steckel, F. Schillebeeckx, H. Peremans","doi":"10.1109/ICSENS.2011.6126961","DOIUrl":"https://doi.org/10.1109/ICSENS.2011.6126961","url":null,"abstract":"Biomimetic sonar systems, i.e. sonar systems making use of spectral cues for the localization of one or more reflectors, depend heavily on the spatial filters of the reception subsystem. These spatial filters can be implemented in two ways, e.g., by means of an artificial pinna or by means of an array of microphones in combination with a beamforming algorithm. In this paper we compare two such systems using an information theoretic model, which allows objective evaluation of each system from an echolocation point of view.","PeriodicalId":201386,"journal":{"name":"2011 IEEE SENSORS Proceedings","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123371712","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}
C. Barreiro, A. Bross, J. Schmalzel, P. M. Jansson
{"title":"Sensor array for PV shading measurements","authors":"C. Barreiro, A. Bross, J. Schmalzel, P. M. Jansson","doi":"10.1109/ICSENS.2011.6127368","DOIUrl":"https://doi.org/10.1109/ICSENS.2011.6127368","url":null,"abstract":"The number of photovoltaic (PV) system installations around the world is rapidly expanding, driven by a combination of factors including steadily falling costs, tax and rebate incentives, and interest in carbon reduction. Optimizing the total energy production of PV systems is dependent on minimizing losses and avoiding conditions which can adversely affect performance and lifetime. Module shading is one such critical element. Shading can arise from inter-row effects as well as from vegetation, buildings, and precipitation. In order to make objective measurements of shading, we have designed a system employing spot metering and sensor arrays. In order to bring array monitoring costs to affordable levels, we have employed low-cost photodiodes that are deployed in the mobile and computer market. Our shading sensor is organized in a linear array. This paper describes the development and characterization of the sensor array and provides examples of its use to evaluate the effects of inter-row shading that could be experienced by a typical PV module.","PeriodicalId":201386,"journal":{"name":"2011 IEEE SENSORS Proceedings","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121216893","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}
Christoph Walter, Erik Schulenburg, Maik Poggendorf, N. Elkmann
{"title":"A QoS enabled visual sensor-system applied to the problem of localizing mobile platforms in indoor environments","authors":"Christoph Walter, Erik Schulenburg, Maik Poggendorf, N. Elkmann","doi":"10.1109/ICSENS.2011.6127113","DOIUrl":"https://doi.org/10.1109/ICSENS.2011.6127113","url":null,"abstract":"Here we present a sensor-system that integrates two low cost CMOS cameras, LED illumination, 3-axis MEMS gyroscopes and accelerometers, and a data processing node in a compact shell. The sensor-system supports different modes of operation including incremental position tracking, visual self localization and mapping, inertial navigation, pose estimation using artificial landmarks, as well as combinations of the mentioned techniques depending on application scenario and environment conditions. In contrast to existing work we use the output of the inertial measurement unit not only to provide estimates on the systems pose but also to suppress camera output during unfavorable movement thus improving the performance of image processing while reducing utilization of overall system resources, resulting in a dynamically adapting quality of service.","PeriodicalId":201386,"journal":{"name":"2011 IEEE SENSORS Proceedings","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114624302","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}
{"title":"A mouse sensor and a 2-pixel motion sensor exposed to continuous illuminance changes","authors":"F. Expert, S. Viollet, F. Ruffier","doi":"10.1109/ICSENS.2011.6127002","DOIUrl":"https://doi.org/10.1109/ICSENS.2011.6127002","url":null,"abstract":"Considerable attention has been paid during the last decade to navigation systems based on the use of visual optic flow cues, especially for guiding autonomous robots designed to travel under specific lighting conditions. In the present study, the performances of two visual motion sensors used to measure a local 1-D angular speed, namely (i) a bio-inspired 2-pixel motion sensor and (ii) an off-the-shelf mouse sensor, were tested for the first time in a wide range of illuminance levels. The sensors' characteristics were determined here by recording their responses to a purely rotational optic flow generated by rotating the sensors mechanically and comparing their responses with an accurate rate gyro output signal. The refresh rate, a key parameter for future optic flow-based robotic applications, was also defined and tested in these two sensors. The bio-inspired 2-pixel motion sensor was found to be more accurate indoors whereas the mouse sensor was found to be more efficient outdoors.","PeriodicalId":201386,"journal":{"name":"2011 IEEE SENSORS Proceedings","volume":"56 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114002883","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}
{"title":"A self-powered high sensitive sensor for AC electric current","authors":"Wei He, Ping Li, Y. Wen, Caijiang Lu","doi":"10.1109/ICSENS.2011.6127288","DOIUrl":"https://doi.org/10.1109/ICSENS.2011.6127288","url":null,"abstract":"This paper presents a novel sensor for alternating current. The new current sensor is comprised of a ferromagnetic invariant elastic alloy (FCEA) cantilever and piezoelectric ceramic Pb(Zr,Ti)O3 (PZT8) bonded on the cantilever's root. When placed near a single electric cable carrying alternating current, the cantilever bends in the non-uniform magnetic field of the electric cable as a result of the magnetostriction of the FECA. The PZT8 produces a voltage proportional to the current in the electric cable. To produce optimal output, a tunable wolfram mass is mounted on the free end of the cantilever to make the sensor resonate with the frequency of the alternating current. This design requires no external power source and remains electrically isolated from the electric cable. Our experimental results show linear behavior with sensitivities about 211.8mV/A from 1Arms to 10Arms at a resonance frequency of 50Hz.","PeriodicalId":201386,"journal":{"name":"2011 IEEE SENSORS Proceedings","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126358655","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}