2009 IEEE SensorsPub Date : 2009-10-01DOI: 10.1109/ICSENS.2009.5398250
Shi-Wei Wang, Chih-Heng Lin, Yuh-Shyong Yang, M. S. Lu
{"title":"A CMOS capacitive dopamine sensor with Sub-nM detection resolution","authors":"Shi-Wei Wang, Chih-Heng Lin, Yuh-Shyong Yang, M. S. Lu","doi":"10.1109/ICSENS.2009.5398250","DOIUrl":"https://doi.org/10.1109/ICSENS.2009.5398250","url":null,"abstract":"Interdigitated microelectrodes integrated with CMOS sensing circuitry are presented in this work for detection of the neurotransmitter dopamine and as an immunosensor with sensitivity enhanced by gold nanoparticles. Microelectrodes covered by the silicon dioxide layer are fabricated through a maskless post-CMOS process. Charged biomolecules bind to the functionalized oxide surface after immobilization, producing a capacitive change for the underlying electrodes. Three electrode designs with gaps from 0.5 µm to 1 µm and capacitance values from 13 fF to 925 fF are tested. The capacitance increases with respect to the concentrations of nanoparticle and dopamine. The minimum detectable concentration of dopamine is 540 pM at a 1-Hz bandwidth.","PeriodicalId":262591,"journal":{"name":"2009 IEEE Sensors","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121035529","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}
2009 IEEE SensorsPub Date : 2009-10-01DOI: 10.1109/ICSENS.2009.5398292
Shinji Kuriyama, Ming Ding, Y. Kurita, T. Ogasawara, J. Ueda
{"title":"Flexible sensor for Mckibben pneumatic actuator","authors":"Shinji Kuriyama, Ming Ding, Y. Kurita, T. Ogasawara, J. Ueda","doi":"10.1109/ICSENS.2009.5398292","DOIUrl":"https://doi.org/10.1109/ICSENS.2009.5398292","url":null,"abstract":"A flexible electro-conductive rubber sensor for measuring the length of a McKibben pneumatic actuator has been developed. Mckibben actuators are flexible, lightweight, and widely used to actuate power assisting devices for which compliance is required for safety. The actuator's length needs to be measured to control the devices accurately. However, the flexibility and lightweight properties might be lost if rigid sensors such as linear potentionmeters or encoders are directly attached to the actuators. To keep the desirable properties of McKibben actuators, compact and flexible sensors are necessary. In this paper, a flexible sensor using electro-conductive flexible rubber is proposed to measure the length of McKibben actuators. Using this sensor, a higher accuracy can be obtained by measuring the circumference displacement than directly measuring the axial displacement. The estimation accuracy is evaluated and the usefulness of the proposed method is verified by adopting to a multiple-link robot arm driven by the McKibben actuators.","PeriodicalId":262591,"journal":{"name":"2009 IEEE Sensors","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116607325","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}
2009 IEEE SensorsPub Date : 2009-10-01DOI: 10.1109/ICSENS.2009.5398460
N. Miyamura
{"title":"Onboard wavefront estimation using spatial light modulator as a phase diversity generator","authors":"N. Miyamura","doi":"10.1109/ICSENS.2009.5398460","DOIUrl":"https://doi.org/10.1109/ICSENS.2009.5398460","url":null,"abstract":"We propose an adaptive optics system for a lightweight remote sensing sensor. The phase diversity (PD) technique, in which known wavefronts (Phase Diversity) are applied to the optics and the inherent aberrations are estimated using the acquired images without a priori information, is a key to realizing the system. For the reduction of computing cost and the enhancement of the estimation accuracy of aberration, a spatial light modulator (SLM) is adopted not only for wavefront compensator but also for PD generator. The SLM produces arbitrary “aberration modes” that are each represented by a Zernike polynomial. Therefore, optimal phase diversities are applied to the optical system and particular modes are effectively obtained, which makes it possible to overcome the conventional PD generated by defocusing that describes only quadratic form and lacks information of a particular mode. In order to solve the complex inverse problem of phase diversity with low computing cost, a general regression neural network (GRNN) is used. Moreover, principal component analysis compresses the input data for GRNN by extracting information from collected images in Fourier space, and reduces computation cost considerably. The performance is validated by numerical simulation, and the result of experiment using SLM is described.","PeriodicalId":262591,"journal":{"name":"2009 IEEE Sensors","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125302304","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}
2009 IEEE SensorsPub Date : 2009-10-01DOI: 10.1109/ICSENS.2009.5398497
S. Gunapala, S. Bandara, J. Liu, J. Mumolo, D. Ting, C. Hill, J. Nguyen
{"title":"First demonstration of megapixel dual-band QWIP focal plane array","authors":"S. Gunapala, S. Bandara, J. Liu, J. Mumolo, D. Ting, C. Hill, J. Nguyen","doi":"10.1109/ICSENS.2009.5398497","DOIUrl":"https://doi.org/10.1109/ICSENS.2009.5398497","url":null,"abstract":"Quantum well infrared photodetectors (QWIPs) are well known for their stability, high pixel-pixel uniformity and high pixel operability which are quintessential parameters for large area imaging arrays. In this paper we report the first demonstration of the megapixel-simultaneously-readable and pixel-co-registered dual-band QWIP focal plane array (FPA). The dual-band QWIP device was developed by stacking two multi-quantum-well stacks tuned to absorb two different infrared wavelengths. The full width at half maximum (FWHM) of the mid-wave infrared (MWIR) band extends from 4.4 – 5.1 µm and FWHM of the long-wave infrared (LWIR) band extends from 7.8 – 8.8 µm. Dual-band QWIP detector arrays were hybridized with direct injection 30 µm pixel pitch megapixel dual-band simultaneously readable CMOS read out integrated circuits using the indium bump hybridization technique. The initial dual-band megapixel QWIP FPAs were cooled to 68K operating temperature. The preliminary data taken from the first megapixel QWIP FPA has shown system NEΔT of 27 and 40 mK for MWIR and LWIR bands respectively.","PeriodicalId":262591,"journal":{"name":"2009 IEEE Sensors","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122419070","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}
2009 IEEE SensorsPub Date : 2009-10-01DOI: 10.1109/ICSENS.2009.5398132
S. Ueno
{"title":"Recent advances in biomagnetics and bioimaging for brain research and sensing technologies","authors":"S. Ueno","doi":"10.1109/ICSENS.2009.5398132","DOIUrl":"https://doi.org/10.1109/ICSENS.2009.5398132","url":null,"abstract":"Biomagnetics is an interdisciplinary field where magnetics, biology and medicine overlap. Recent advances in biomagnetics have enabled us not only to detect extremely weak magnetic fields from the human brain but also to control cell orientation and cell growth by using extremely high magnetic fields. Pulsed magnetic fields are also routinely used nowadays for for the magnetic stimulation of the human brain, and both high frequency magnetic fields and magnetic nano-particles have promising therapeutic and diagnostic applications. Here we will also show how highly sensitive superconducting magnetometers have shown great potential for high resolution magneto-encephalography. On the imaging front, magnetic resonance imaging (MRI) is now a powerful tool for basic and clinical medicine. New methods of MRI based on the imaging of impedance of the human body, called impedance MRI, and the imaging of neuronal current activities in the human brain, called current MRI, are also being developed.","PeriodicalId":262591,"journal":{"name":"2009 IEEE Sensors","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122456842","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}
2009 IEEE SensorsPub Date : 2009-10-01DOI: 10.1109/ICSENS.2009.5398232
Khin Moh Moh Aung, A. N. Naim, X. Su
{"title":"Studying nuclear hormone receptor-response element interactions using surface plasmon resonance imaging technique","authors":"Khin Moh Moh Aung, A. N. Naim, X. Su","doi":"10.1109/ICSENS.2009.5398232","DOIUrl":"https://doi.org/10.1109/ICSENS.2009.5398232","url":null,"abstract":"We have applied SPR imaging technique for efficient and precise measurement of the binding of estrogen receptors (ERα and ERβ) with their response elements (EREs) arrayed on chip. Four EREs - one containing a perfect core sequence (GGTCAnnnTGACC), and three containing imperfect cores (i.e., with one base substitution in one of the half-site, GGTCAnnnTGGCC; with one half-site mutant, GGTCAnnnCACGA and a scrambled DNA with both half-site mutant) were involved in this study. ERα and ERβ binding to these sequences at two buffer conditions (higher and lower ionic strength) was measured to determine the salt effects and sequence impact on ER-ERE binding. Distinct binding behaviour of ERα and ERβ has been compared. Conventional SPR experiments were run in parallel to cross check the results from SPR imager and to optimize the assay protocol of the SPR imager. A precise measurement of sequence dependent ER-ERE binding is of significance in determining the rules, by which ERs are recruited by DNA.","PeriodicalId":262591,"journal":{"name":"2009 IEEE Sensors","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133163644","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}
2009 IEEE SensorsPub Date : 2009-10-01DOI: 10.1109/ICSENS.2009.5398313
S. Guru, Daniel Smith, Y. Shu, P. D. de Souza
{"title":"Performance evaluation of the impact of mobile base station on clustered wireless sensor networks","authors":"S. Guru, Daniel Smith, Y. Shu, P. D. de Souza","doi":"10.1109/ICSENS.2009.5398313","DOIUrl":"https://doi.org/10.1109/ICSENS.2009.5398313","url":null,"abstract":"Base station mobility can be exploited to minimise the energy consumption in a wireless sensor network. This paper investigates the impact that base station movement has upon the performance of cluster-based wireless sensor networks. Three types of base station movement are considered: movement influenced by the position of cluster-heads, random movement and movement partially influenced by the position of cluster-heads. In spite of the overhead associated with finding the base station, the wireless sensor network was shown to gather at least 15% more data packets per Joule of energy with a mobile base station compared to a static base station.","PeriodicalId":262591,"journal":{"name":"2009 IEEE Sensors","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133198826","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}
2009 IEEE SensorsPub Date : 2009-10-01DOI: 10.1109/ICSENS.2009.5398243
K. Moran, B. DeMartini, K. Turner, K. Åstrom
{"title":"Frequency resolution of a multi degree of freedom resonator","authors":"K. Moran, B. DeMartini, K. Turner, K. Åstrom","doi":"10.1109/ICSENS.2009.5398243","DOIUrl":"https://doi.org/10.1109/ICSENS.2009.5398243","url":null,"abstract":"This paper outlines the process for estimating measurable parameters in a multi degree of freedom micro resonator. Thermal mechanical noise provides a baseline limit for frequency resolution of micro resonators. We develop the likelihood function for a linear regression model of 2 degree of freedom resonator. Using the Cramer-Rao inequality we determine the minimum possible covariance to estimate parameters, such as the natural frequency of the system.","PeriodicalId":262591,"journal":{"name":"2009 IEEE Sensors","volume":"248 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134243566","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}
2009 IEEE SensorsPub Date : 2009-10-01DOI: 10.1109/ICSENS.2009.5398343
V. Dau, T. X. Dinh, Q. Nguyen, R. Amarasinghe, Katsuhiko Tanaka, S. Sugiyama
{"title":"Microfluidic valveless pump actuated by electromagnetic force","authors":"V. Dau, T. X. Dinh, Q. Nguyen, R. Amarasinghe, Katsuhiko Tanaka, S. Sugiyama","doi":"10.1109/ICSENS.2009.5398343","DOIUrl":"https://doi.org/10.1109/ICSENS.2009.5398343","url":null,"abstract":"This paper presents the study on displacement valveless micropump which is actuated by electromagnetic force on a permanent magnet embedded in PDMS diaphragm. The network channel of the present pump includes two inlets and one outlet channels forming an intersection in front of a pump chamber. Two designs of the pump with different structure of the inlet channels are investigated. One structure of the inlet is curved around the pump chamber (type I) and the other is straight channels (type II). Both types of pump are in one layer structure. The numerical simulation results show that Type I produces larger flow rate than that of Type II. However, at small deflection of the diaphragm, the difference in flow rates between two pumps is not much. Type I shows a clear advance pump performance in comparison with Type II when deflection becomes large. Type I has been fabricated by MEMS technology for experiment study. The fundamental characteristics of the pump have been validated. The flow rate of up to 1.2 mL/min was obtained at driven frequency of 30Hz and applied current of 35 mA.","PeriodicalId":262591,"journal":{"name":"2009 IEEE Sensors","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133133260","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}
2009 IEEE SensorsPub Date : 2009-10-01DOI: 10.1109/ICSENS.2009.5398366
B. Denkena, H. Kayapinar, H. Gatzen, F. Pape
{"title":"Design, fabrication, and calibration of capacitive air gap sensors for the application in levitation based guides in microactuators","authors":"B. Denkena, H. Kayapinar, H. Gatzen, F. Pape","doi":"10.1109/ICSENS.2009.5398366","DOIUrl":"https://doi.org/10.1109/ICSENS.2009.5398366","url":null,"abstract":"The development of a capacitive sensor for controlling the gap of contactless guides in microactuators is presented in this paper. The counter electrode of the capacitive air gap sensor is kept free from electric leads and the dimension of the active region of the sensor is 445 µm × 950 µm. For the fabrication of the sensor, thin-film processes were applied. The capacitance at the upper measurement range of 15 µm represents 125 fF. An appropriate evaluating circuit provides enough resolution to operate at the pre-defined gap of 7 µm.","PeriodicalId":262591,"journal":{"name":"2009 IEEE Sensors","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114084979","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}