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IEEE Sensors Applications Symposium, SAS

作者： Tai-Ping Sun Jia-Hao Li Hsiu-Li Shieh Lai-Li Kang Yi-Chuan Lu Teng-Yi Wang Department of Electronics Engineering Nan Kai University of Technology Nantou County Taiwan R.O.C Department of Electrical Engineering National Chi Nan University Nantou County Taiwan R.O.C Graduate Program of Optoelectronic Technology National Chi Nan University

Considered that the dual band sensor system is the most popular design at present, this study discussed the design of a dual-band hybrid array readout circuit. The direct injection circuit structure was used in the unit pixel. The design, simulation, and layout were conducted in the 40um×40um unit pixel to complete middle and long waveband signal readouts, in order to achieve one sensor unit with two sensor modes. The readout circuit chip adopted TSMC 0.35um 2P4M CMOS 5V to design a 16×12 array readout circuit, with an input current range of the measured current at 1.9pA to 50 nA, an adjustable integration time, a maximum frame rate of 110Hz, the output swing of the chip signal of 2V, the maximum operating chip frequency of 3MHz, power dissipation of 18mW, system noise voltage Vrms of 0.68mV, and signal-noise ratio of 69dB. Finally, the tested chip was used to connect the detection system proxy board and digital signal board, and digital signal processing video through front-end filters and analog to digital converter, in order to complete signal conversion and digital signal processing. With the digital control signal provided by the signal board and signal capture, the back-end digital signal was processed and imaged on the screen. The readout circuit chip connected the signal proxy board for testing. The overall system resolution reached 10 bit.

关键词： Arrays Dual band Field programmable gate arrays Noise Infrared sensors Optical sensors

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Measurement of capacitance and electrical potential of plural points for estimation of permittivity distribution

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IEEJ Transactions on Fundamentals and Materials 2013年第4期133卷 173-179+5页

作者： Okada, Shota Ohchi, Masashi Furukawa, Tatsuya Itoh, Hideaki Fukumoto, Hisao Master's Program in Electrical Graduate School of Engineering Chiba Institute of Technology 2-17-1 Tudanuma Narashino 275-0016 Japan Department of Electrical Electronics and Computer Engineering Faculty of Engineering Chiba Institute of Technology 2-17-1 Tudanuma Narashino 275-0016 Japan Graduate School of Science and Engineering Saga University 1 Honjo-machi Saga 840-8502 Japan

Recently, a method for estimating permittivity distributions was reported. The method combined a numerical technique (Finite Element Method) with Genetic Algorithm (GA). However, methods for estimating the distribution of permittivity have not yet been established. The purpose of this study is to obtain experimental data in order to improve the estimation method. We measured capacitance and electrical potential of plural points when an acrylic rod is placed in various positions within a measurement system. © 2013 The Institute of electrical Engineers of Japan.

关键词： Capacitance

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Stimulating auditory nerve with MEMS harvesters for fully implantable and self-powered cochlear implants

Stimulating auditory nerve with MEMS harvesters for fully im...

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2013 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013

作者： Beker, Levent Zorlu, Ozge Goksu, Nebil Kulah, Haluk Ankara Turkey Micro and Nanotechnology Graduate Program METU Ankara Turkey Department of Otorhinolaryngology School of Medicine Gazi University Ankara Turkey Department of Electrical and Electronics Engineering METU Ankara Turkey

ISBN: (纸本)9781467359818

This paper presents a novel method for stimulating auditory nerve inside cochlea via a MEMS piezoelectric energy harvester (PEH) implanted on eardrum or ossicles1. In this method, the harvester composed of several cantilevers with varying resonance frequencies within the hearing band is utilized. The signals generated by each cantilever of the PEH are used to stimulate the corresponding section of the auditory nerve. The proposed method mimics the natural operation of cochlea, therefore eliminates the use of microphone, sound processor, battery, and transmitter that are currently used in conventional cochlear implants (CI's). In this framework, a single-cantilever MEMS PEH prototype is designed and fabricated. The prototype generates adequate signal to stimulate the auditory nerve at a typical eardrum vibration, proving the method's feasibility for the next generation fully implantable and self-powered CI's. © 2013 IEEE.

关键词： Cochlear implants

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A hardware approach for solving the robot localization problem using a sequential EKF

A hardware approach for solving the robot localization probl...

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2013 IEEE 37th Annual Computer Software and Applications Conference, COMPSAC 2013

作者： Cruz, Sergio Munoz, Daniel M. Conde, Milton E. Llanos, Carlos H. Borges, Geovany A. Department of Mechanical Engineering Braśýlia D.F. 70910-900 Brazil Electronics Engineering Graduate Program Faculty of Gama Braśýlia D.F. 70910-900 Brazil Department of Electrical Engineering University of Brasilia Braśýlia D.F. 70910-900 Brazil

ISBN: (纸本)9780769549798

This work describes a hardware architecture for implementing a sequential approach of the Extended Kalman Filter (EKF) that is suitable for mobile robotics tasks, such as self-localization, mapping and navigation problems. As such algorithm is computationally intensive, commonly it is implemented in PC-based platforms to be employed on larger robots. In order to allow the development of small robotic platforms, as those required in many current state of the art research (for instance micro robotics area), small size, low-power and high precision computation capabilities are required. This work proposes a hardware architecture for self-localization task, allowing the fusion of data coming from different sensors such as ultrasonic and laser rangefinder. The architecture is based on a single precision floating-point arithmetic, allowing the operations to be computed with large precision and dynamic range. The system has been adapted for achieving a reconfigurable platform, suitable for research tasks, and applied to a Pioneer 3AT mobile robot platform from Mobile Robots Inc. In order to compare the performance of the system, the same localization technique has been implemented in a high-end PC, as well as using an embedded microprocessor Nios II from Alter a Inc. In this paper several metrics have been used to evaluate system performance and suitability, measuring FPGA resources consumption and performance. Finally, the suitability of reconfigurable devices for such kind of applications has been verified and also discussed. © 2013 IEEE.

关键词： Extended Kalman filters

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A Hardware Approach for Solving the Robot Localization Problem Using a Sequential EKF

A Hardware Approach for Solving the Robot Localization Probl...

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IEEE International Symposium on Parallel and Distributed Processing Workshops and Phd Forum (IPDPSW)

作者： Sérgio Cruz Daniel M. Muñoz Milton E. Conde Carlos H. Llanos Geovany A. Borges Department of Mechanical Engineering Faculty of Gama Electronics Engineering Graduate Program Department of Electrical Engineering University of Brasilia Brasília D.F Brazil

关键词： Field programmable gate arrays Hardware Kalman filters Robot sensing systems Sensor fusion

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2-D thresholding of the connectivity map following the multiple sequence alignments of diverse datasets

2-D thresholding of the connectivity map following the multi...

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10th IASTED International Conference on Biomedical engineering, BioMed 2013

作者： Doǧan, Tunca Karaçali, Bilge Biotechnology and Bioengineering Graduate Program Izmir Institute of Technology Dokuz Eylül University Izmir Turkey Electrical and Electronics Engineering Department Izmir Institute of Technology Dokuz Eylül University Izmir Turkey Institute of Health Sciences Dokuz Eylül University Izmir Turkey

ISBN: (纸本)9780889869530

Multiple sequence alignment (MSA) is a widely used method to uncover the relationships between the biomolecular sequences. One essential prerequisite to apply this procedure is to have a considerable amount of similarity between the test sequences. It's usually not possible to obtain reliable results from the multiple alignments of large and diverse datasets. Here we propose a method to obtain sequence clusters of significant intragroup similarities and make sense out of the multiple alignments containing remote sequences. This is achieved by thresholding the pairwise connectivity map over 2 parameters. The first one is the inferred pairwise evolutionary distances and the second parameter is the number of gapless positions on the pairwise comparisons of the alignment. Threshold curves are generated regarding the statistical parameter values obtained from a shuffled dataset and probability distribution techniques are employed to select an optimum threshold curve that eliminate as much of the unreliable connectivities while keeping the reliable ones. We applied the method on a large and diverse dataset composed of nearly 18000 human proteins and measured the biological relevance of the recovered connectivities. Our precision measure (0.981) was nearly 20% higher than the one for the connectivities left after a classical thresholding procedure displaying a significant improvement. Finally we employed the method for the functional clustering of protein sequences in a gold standard dataset. We have also measured the performance, obtaining a higher F-measure (0.882) compared to a conventional clustering operation (0.827).

关键词： Probability distributions

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Band classification based on chromosome shapes

Band classification based on chromosome shapes

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Biomedical engineering International Conference (BMEiCON)

作者： Ravi Uttamatanin Peerapol Yuvapoositanon Apichart Intarapanich Saowaluck Kaewkamnerd Sissades Tongsima The Electrical Engineering Graduate Program Mahanakorn University of Technology Bangkok Thailand National Electronics and Computer Technology Center Pathum thani Thailand Electronic Engineering Department Mahanakorn University of Technology Bangkok Thailand National Center for Genetic Engineering and Biotechnology Pathum thani Thailand

For an automatic chromosome classification, band resolution information is required in order to perform diagnosis on numerical and structural abnormalities. Metaphases with low band resolution are normal used for numerical abnormality analysis while metaphases with high band resolution are used for structural abnormality analysis. In our work, we classify metaphases into low and high band resolution groups using chromosome shape. This band classification task can automatically perform without human intervention leading to faster the diagnosis process. The results showed that chromosome shape information is able to classify metaphases into low and high band resolution groups with the accuracy of 73.08% and 95.24%, respectively.

关键词： Biological cells Image resolution Probability density function Shape Accuracy Image segmentation Microscopy

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A room temperature, zero force, wafer-level attachment method for MEMS integration

A room temperature, zero force, wafer-level attachment metho...

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IEEE International Conference on Micro Electro Mechanical Systems

作者： Levent Beker Özge Zorlu Haluk Külah METU MEMS Center Micro and Nanotechnology Graduate Program Middle East Technical University Ankara Turkey METU MEMS Center Middle East Technical University Ankara Turkey METU MEMS Center Micro and Nanotechnology Graduate Program Department of Electrical and Electronics Engineering Middle East Technical University Ankara Turkey

This paper presents a wafer level attachment method for handling various shaped structures for MEMS processes, using parylene as an interlayer material. In this method, a handle wafer containing pillars and perforations is utilized, and structures are attached to the handle wafer through a parylene coating process realized at room temperature with no applied force. It is observed that pillars with 20 μm height, 2.5 mm side length, and 4.5 mm spacing can successfully be used to attach two 4" substrates to each other. The shear strength between the attached substrates is measured as 0.49 MPa, proving the feasibility of the method for integrating various materials into MEMS processes.

关键词： Substrates Bonding Force Micromechanical devices Coatings Silicon

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Frictional characteristics measurement of a ceramic aerostatic linear bearing 5

Frictional characteristics measurement of a ceramic aerostat...

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5th International Conference on Advanced Micro-Device engineering, AMDE 2013

作者： Kitabata, Kouki Iwashita, Hiroshi Takita, Akihiro Djamal, Mitra Pornsuwancharoen, Nithiroth Fujii, Yusaku Education Program of Electronics and Informatics Mathematics and Physics Graduate School of Science and Technology Gunma University 1-5-1 Tenjin-cho Kiryu Gunma376-8515 Japan Depatment of Electronics Graduate School of Engineering Gunma University 1-5-1 Tenjin-cho Kiryu Gunma376-8515 Japan Division of Mechanical Sience and Technology Graduate School of Tecnology Gunma University 1-5-1 Tenjin-cho Kiryu Gunma376-8515 Japan Theoretical High Energy Physics and Instrumentation Research Group Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Jl. Ganesa 10 Bandung40132 Indonesia Department of Electrical Engineering Faculty of Industry and Technology Rajamangala University of Technology Isan Sakonnakon47160 Thailand

ISBN: (纸本)9783038354659

The resultant force acting on the moving part of the ceramic aerostatic linear bearing is measured highly accurately as the inertial force of the moving part of the bearing by means of the levitation mass method (LMM). The measurement results of the ceramic aerostatic linear bearing and metal aerostatic linear bearing of different mass are compared. The regression equation of the ceramic aerostatic linear bearing and metal aerostatic linear bearing are calculated. The ceramic linear bearing and metal linear bearing have extremely small frictional force.. © (2015) Trans Tech Publications, Switzerland.

关键词： Aerodynamics

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On the development of a small hand-held multi-UAV platform for surveillance and monitoring

On the development of a small hand-held multi-UAV platform f...

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International Conference on Unmanned Aircraft Systems (ICUAS)

作者： Gustavo S. C. Avellar Gonçalo D. Thums Rogério R. Lima Paulo Iscold Leonardo A. B. Tôrres Guilherme A. S. Pereira Graduate Program in Electrical Engineering Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil Mechanical Engineering Department Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil Electronics Engineering Department Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil Electrical Engineering Department Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil

This paper addresses the ongoing process of development of a small hand-held multiple unmanned aerial vehicle platform for surveillance and monitoring. The project cover all phases of development, from aerodynamic design and mechanical assembly, through fine tuning low level control loops and design of an attitude and heading reference system, up to implementation of navigation algorithms and finally flight testing. Commercial hardware is used to speed up development, allowing the team responsible for implementing the navigation algorithms to execute and test while the team responsible for the aerodynamics and electronics can design and compare results.

关键词： Global Positioning System Aircraft Sensors Aerodynamics Algorithm design and analysis Hardware

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