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IEEE SENSORS

作者： Qi Wang Zhigang Feng Katsunori Shida Department of Automatic Measurement and Control Harbin Institute of Technology Harbin China Faculty of Science and Engineering Saga University Saga Japan

A new prototype of self-validating pressure sensor is described. The elastic body of the transducer is based on circular-flat diaphragm structure. Eight groups of strain gauges are distributed on the diaphragm. One group of metal strain gauge with little temperature drift is used as primary pressure sensor, the other seven groups of semiconductor strain gauges with high sensitivity are used as calibration references. Consistency checking is used to detect sensor fault. The outputs of self-validating pressure sensor including validated measurement value (VMV) of pressure, validated uncertainty (VU) of pressure and measurement value status (MVS) of pressure are calculated using the high consistency data. A new fault diagnosis method based on wavelet packet decomposition feature extraction and support vector machine multi-classification is used to identify six sensor fault status. A double DSPs system is implemented to acquire the output signal and complete self-validating methods. The experiment results show that the designed pressure sensor prototype implements the self-validating function. It can detect fault in real-time and identify sensor status with high accuracy.

关键词： Capacitive sensors Fault diagnosis Prototypes Temperature sensors Fault detection Pressure measurement Sensor phenomena and characterization Transducers Calibration Wavelet packets

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Multifunction spectrometer for optical inspection of red wine

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Sensing and Instrumentation for Food Quality and Safety 2008年第1期2卷 58-65页

作者： Niskanen, Ilpo Mutanen, Jarkko Lehtonen, Pekka Räty, Jukka Yamaguchi, Masahiro Peiponen, Kai-Erik Jaaskelainen, Timo Measurement and Sensor Laboratory Research and Development Centre of Kajaani University of Oulu Technology Park 127 Kajaani 87400 Finland Imaging Science and Engineering Laboratory Tokyo Institute of Technology 4259 Nagatsuta Midori-ku Yokohama 226 Japan Alko Incorporated Alcohol Control Laboratory P.O. Box 279 Vantaa 01301 Finland Department of Physics and Mathematics University of Joensuu P.O. Box 111 Joensuu 80101 Finland

The main goal of this study was to develop an apparatus that makes it possible to measure both, color, refractive index and light scattering (turbidity) of red wines using a single device only. Typically such measurement of red wine quality requires three different measurement devices. As an example of the efficiency of the present device we studied the change of the thermo-optical and time-dependent optical properties of red wine samples. Here we report on change of optical properties of two Merlot wine samples, which were obtained by opening authentic red wine bottles and preserving a set of samples both at room and refrigerator temperature for 26 days, respectively. The interesting feature with both red wine samples was that the light scattering, i.e. the turbidity of the samples, increased as a function of time due to oxidation process. It is suggested that the multifunction spectrophotometer can be applied for optical inspection of red and other wine products. © Springer Science+Business Media, LLC 2008.

关键词： Wine

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A Method for Spherical Localization Using Modified Hough Transform

A Method for Spherical Localization Using Modified Hough Tra...

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International Symposium on Intelligent Information technology Application, IITA

作者： He Guang-lin Huang Ke-wei Yuan Ben-sheng Department of Mechatronics Engineering School of Aerospace and Science Technology Beijing Institute of Technology Beijing China Department of Measurement and Control Technologies School of Information Engineering University of Science and Technology Beijing Beijing China

Two image sensors simulate directly the way of disposing images with the humanpsilas two eyes, so it has important value to apply to many domains, such as object identify, UAV detection, robot navigation, and so on. This paper focus on the object localization and distance detection based on two image sensors. It concentrates on how to apply two CCD image sensors to object localization of a sphere in complex environments. A space model of the two image sensors was set up, then an experiment platform was built in order to prove the correctness and feasibility of that localization algorithm, and the relationship between the coordinate localization accuracy and the sensor structural parameters was analyzed.

关键词： Image sensors Object detection Eyes Unmanned aerial vehicles Robot sensing systems Robot kinematics Orbital robotics Navigation Charge-coupled image sensors Structural engineering

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Multiple Bits Distributed Moving Horizon State Estimation for Wireless Sensor Networks

Multiple Bits Distributed Moving Horizon State Estimation fo...

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7th World Congress on Intelligent control and Automation (WCICA 2008), vol.7

作者： Ji'an Luo Li Chai Peng Jiang Institute of information & control Hangzhou Dianzi University Hangzhou China Engineering Research Center of Metallurgical Automation and Measurement Technology Wuhan University of Science and Technology Wuhan China

Wireless sensor networks distributed signal processing has to operate under stringent energy and bandwidth limitations. Usually, the observations need to be quantized before they are sent to fusion center (FC). This paper we introduce a multiple bits distributed moving Horizon state estimation approach based on a multiple state single output Gaussian-Markov model. Each sensor node has a thresholds book, then the sensors quantize their measurements to several bits by using the thresholds book which are sent to fusion center. After receiving these information, fusion center make final estimation for system states. Compared with single bit distributed moving horizon state estimation (DMHE), this method ensures that FC need not to send the estimate information back to sensor nodes and provides higher precision of state estimation.

关键词： Wireless sensor networks Distributed state estimation Moving horizon Multiple bits

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Distributed state estimation based on quantized observations in a bandwidth constrained sensor network

Distributed state estimation based on quantized observations...

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World Congress on Intelligent control and Automation (WCICA)

作者： Li Chai Bocheng Hu Peng Jiang Engineering Research Center of Metallurgical Automation and Measurement Technology Wuhan University of Science and Technology Wuhan China Institute of Information and Control Hangzhou Dianzi University Hangzhou China

A distributed state estimation scheme based on quantized observations in wireless sensor network (WSN) is proposed. Unlike the SOI-KF approach, we address the state estimation problem in two steps: firstly, local sensors and the fusion center apply the decentralized estimation scheme (DES) to design the quantized message function and the fusion function; secondly, the fusion center constructs a linear filter to obtain the state estimation by minimizing an upper bound of the error power norm. The optimal filter is computed by the linear matrix inequality (LMI) solver. An example is presented to demonstrate the efficiency of our method.

关键词： State estimation Noise Wireless sensor networks Maximum likelihood detection Nonlinear filters Artificial neural networks Filtering

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Secret Distribution for Secure Fingerprint Verification

Secret Distribution for Secure Fingerprint Verification

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International Conference on Hybrid Information technology, ICHIT

作者： Hanna Choi Sungju Lee Daesung Moon Yongwha Chung Sungbum Pan Department of Computer and Information Science Korea University South Korea Biometrics Technology Research Team Electronics and Telecommunications Research Institute Daejeon South Korea Division of Information and Control Measurement Engineering Chosun University South Korea

Recently, in the smart-card based authentication system, there is an increasing trend of using fingerprint for the card holder verification, instead of passwords. However, the security of the fingerprint data is particularly important as the possible compromise of the data will be permanent. In this paper, we propose an approach for secure fingerprint verification by distributing both the secret and the computation based on the fuzzy vault (a cryptographic construct which has been proposed for crypto-biometric systems). That is, a user fingerprint template which is applied to the fuzzy vault is divided into two parts, and each part is stored into a smart-card and a server, respectively. At distributing the fingerprint template, we consider both the security level and the verification accuracy. Then, the geometric hashing technique is applied to solve the fingerprint alignment problem, and this computation is also distributed over the combination of the smart-card and the server in the form of the challenge-response. Finally, the polynomial can be reconstructed from the accumulated real points from both the smart-card and the server. Based on the experimental results, we confirm that our proposed approach can perform the fuzzy vault-based fingerprint verification more securely on a combination of a smart-card and a server without significant degradation of the verification accuracy.

关键词： Fingerprint recognition Servers Security Polynomials Feature extraction Fingers Accuracy

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Stability Analysis of Distributed Parameter Systems on Temperature measurement of Large-scale Objects

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Journal of Thermal Science 2007年第3期16卷 248-253页

作者： Zhenliang DING Li ZHONG Feng YUAN Department of Electronic Engineering School of Automatic Measurement and Control Harbin Institute of Technology 150001 Harbin China

In this paper, the mechanical construction, thermal regulator design and temperature measurement system of a local area were set up for large-scale linear measurement. Numerical analysis based on temperature correlated characteristic is discussed to obtain optimal observation points for the measurements. The horizontal temperature distribution of the measured area is compared with the measurement of the variation of temperature at 15℃ and 20℃ over time, and characteristic of dynamic response is also discussed. In addition, the long-time stability of measured temperature is analyzed by means of using the standard deviation. It characterizes the temperature distribution performance of a large area and how it may impact the measurement of a large-scale object.

关键词： temperature control temperature measurement distribution parameter linear measurement.

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A shaped annular beam tri-heterodyne confocal microscope with good anti-environmental interference capability

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Chinese Physics B 2007年第6期16卷 1624-1631页

作者：赵维谦冯政德邱丽荣 School of Information Engineering Beijing Institute of Technology Beijing 10081 China Department of Automation Measurement and Control Engineering Harbin Institute of Technology Harbin 150001 China

annular beam tri-heterodyne confocal microscope has been proposed to improve the anti-environmental interference capability and the resolution of a eonfoeal microscope. It simultaneously detects far-, on-, and near-focus signals with given phase differences by dividing the measured light path of the eonfoeal microscope into three sub-paths （signals）. Pair-wise real-time heterodyne subtraction of the three signals is used to improve the anti-environmental interference capability, axial resolution, and linearity; and a shaped annular beam super-resolution technique is used to improve lateral resolution. Theoretical analyses and preliminary experiments indicate that an axial resolution of about 1 nm can be achieved with a shaped annular beam tri-heterodyne confoeal microscope and its lateral resolution can be better than 0.2 um for A = 632.8 nm, the numerical aperture of the lens of the microscope is NA = 0.85, and the normalized radius e = 0.5.

关键词： confocal microscopy super-resolution surface measurements

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A study of the method for intermittency test of Empirical mode decomposition

A study of the method for intermittency test of Empirical mo...

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4th International Conference on Information technology and Applications, ICITA 2007

作者： Song, Lixin Wang, Qi Wang, Yujing Yan, Jian Department of Electronic and Information Engineering Harbin University of Science and Technology Harbin 150080 China Department of Automation Measurement and Control Harbin Institute of Technology Harbin 150080 China Department of Automation Measurement and Control Harbin Institute of Technology Harbin 150001 China

ISBN: (纸本)0980326702

A new method is presented to solve the mode mixing problem, which caused by intermittency signal of sifting process of Empirical mode decomposition (EMD). For achieving exact location of intermittency signal, the time scale difference between intermittency signal and normal background signal, as well as instantaneous frequency characteristic of intrinsic mode function (IMF) are both used in this method. Depending on the located intermittency signal segment, by boundary extending, redo EMD to separate intermittency signal, accordingly removing the influence of intermittency signal in the following EMD. Compare the results of removing intermittency signal using this method with using wavelet method, results indicate that, using this method, the signal distortion is less than wavelet method. And intermittency signal can be decomposed into one FMF.

关键词： Information technology

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Moving targets detection and tracking based on nonlinear adaptive filtering

Moving targets detection and tracking based on nonlinear ada...

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2007 International Conference on Computational Intelligence and Security Workshops, CIS 2007

作者： Wang, Ying-Li Dai, Ling-Min Department of Automation Measurement and Control Engineering Harbin Institute of Technology P.O.Box 308 Harbin 150001 China

ISBN: (纸本)0769530737

To resolve the problem of the missile detection in the space early-warning process, an efficient method based on nonlinear adaptive filtering is proposed to detect the small IR target of low SNR under the complex background in this paper. The method can eliminate the influence of the unbalance background to the image segmentation, select the small moving target and the noise points and then eliminate wrong point targets to obtain the satisfactory detection result. The effectiveness of the method is proved by the experimental results for several infrared image sequences. © 2007 IEEE.

关键词： Image segmentation

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