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IMTC'05 - Proceedings of the IEEE Instrumentation and measurement technology Conference

作者： Shiping, Zhu Yang, Gao Department of Measurement Control and Information Technology School of Instrumentation Science and Optoelectronics Engineering BeiHang University HaiDian Dist. XueYuan Rd. No. 37 Beijing 100083 China Département de Génie Électrique et de Génie Informatique Faculté de Génie Université de Sherbrooke 2500 boulevard Université Sherbrooke Que. J1K 2R1 Canada

ISBN: (纸本)0780388798

3D coordinates measurement of feature points on the surface of large-scale workpiece is important and difficult, various relative measuring methods have been presented in recent years, and machine vision method has been paid more attentions by researchers. The application of machine vision method in the 3D coordinates measurement of feature points on the surface of large-scale workpiece is discussed in this paper, and an accurate, simple, new measuring method is proposed. The design of the measuring system mainly consider the following aspects: The principle and composition of the measuring system;The study on the monocular vision for the camera locating;The calibration method of CCD camera;Image processing of cross-cutting feature point and the calculation of its 2D image coordinates;The study of binocular stereo vision based on the large-scale CMM. The experimental results indicate the correctness and reliability of the new measuring method and show that it can be used in the non-contact 3D coordinates measurement of cross-cutting feature points on the surface of large-scale workpiece. © 2005 IEEE.

关键词： Three dimensional computer graphics

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Algorithm for circle subpixel location detecting based on point Hough transformation

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Guangxue Jishu/Optical Technique 2005年第SUPPL.期31卷 155-157页

作者： Chen, Shi-Zhe Pu, Zhao-Bang Liu, Guo-Dong Hu, Tao Qu, Yu-Fu Department of Automatic Measurement and Control Harbin Institute of Technology Harbin 150001 China School of Instrument Science and Photoelectric Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China

In order to improve location precision and speed of base circle in PCB (Printed Circuit Board) detecting, an algorithm for circle subpixel location detection was presented. At first, the edge points could be obtained from edge detecting the filtered image using canny operator, then the circle approximately position and its parameter could be gained through dealing with the edge points using point Hough transformation;secondly, the circle's edge points could be got through deleting big noise points according to the circle's parameter, then the circle's subpixel edge points could be obtained from subdividing the circle's edge points;finally the circle's precision location and its parameter could be obtained through fitting the circle's subpixel edge points using least square method. The experiments demonstrate that this algorithm can detect the base circle's subpixel location and its parameter. The center location precision is up to 0.5 pixel, and the radius detection precision is up to 0.3 pixel, and the speed is very high.

关键词： Circle detection Location PCB Point Hough transformation Subpixel

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Fully differential leapfrog-type current mode MOCC II-based filters

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Beijing Gongye Daxue Xuebao / Journal of Beijing University of technology 2005年第6期31卷 570-573页

作者： Wang, Chun-Hua Shen, Guang-Di School of Computer and Communication Hunan University Changsha 410082 China Beijing Optoelectronic Technology Laboratory College of Electronic Information and Control Engineering Beijing University of Technology Beijing 100022 China

In order to restrain odd-order harmonic distortion and common model disturbing signal effectively, a MOCC II-based filter circuit with high-order fully differential leapfrog-type current mode is presented and corresponding design scheme is proposed. The PSPICE simulation to 4th Butterworth filter with 1 MHz but frequency is made. Simulation results show that the circuit can restrain odd-order harmonic distortion and common model disturbing signal more effectively, with low sensitifity of passive LC ladder-type network.

关键词： Electric filters

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An Improved Algorithm for Image Edge Detection Based on Lifting Scheme

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Journal of Electronic Science and technology 2005年第2期000卷

作者： ZHANG Hong-ying WU Bin PENG Qi-cong School of Communication and Information Engineering University of Electronic Science and Technology of China Chengdu 610054 China School of Information and Control Engineering Southwest University of Science and Technology Mianyang Sichuan 621002 China School of Communication and Information Engineering University of Electronic Science and Technology of China Chengdu 610054 China

Wavelet transform is an ideal way for edge detection because of its multi-scale property, localization both in time and frequency domain, sensitivity to the abrupt change of signals, and so on. An improved algorithm for image edge detection based on Lifting Scheme is proposed in this paper. The simulation results show that our improved method can better reflect edge information of images.

关键词： Lifting Scheme edge detection image processing second generation wavelet

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Neural networks data fusion algorithm of electronic equipment fault diagnosis

Neural networks data fusion algorithm of electronic equipmen...

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World Congress on Intelligent control and Automation (WCICA)

作者： Diqi Zhu Shenglin Yu School of Communication and Control Engineering Southern Yangtze University Wuxi Jiangsu China Department of Testing and Measurement Engineering Nanjing University of Aeronautics and Astronautics Nanjing Jiangsu China

ISBN: (纸本)0780382730

In order to judge accurately the fault component of an analog circuit, a fuzzy neural networks fault classifier was designed based on BP neural networks and fuzzy logical theory, and it was used in the photovoltaic radar electronic equipment fault diagnosis. By measuring the temperature and voltage of the circuit component, the membership function of the two sensors to the circuit component was obtained, the data fusion was done by using a fuzzy BP neural networks classifier, the fusion fault membership function of all the fault-doubted circuit components was obtained, and the real fault component was found based on the fusion data. By comparing the diagnosis results based on a separate original data and fused date respectively, it was shown that the latter is more accurate than the former in circuit fault recognition.

关键词： Neural networks Electronic equipment Fault diagnosis Circuit faults Fuzzy neural networks Temperature sensors Analog circuits Fuzzy logic Photovoltaic systems Solar power generation

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Ship wakes detection in SAR images

Ship wakes detection in SAR images

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International Conference on Signal Processing Proceedings (ICSP)

作者： Zhu Weigang Wei Hua Jia Xin Zhou Yinqing Department of Measurement and Control Institute of Command and Technology of Equipment Beijing China School of Electronic Engineering Beijing Aeronautics and Astronautics University Beijing China

Detecting ship wakes from spaceborne SAR images is significant. But it is particularly difficult, especially detecting-thin line features. Because those features are not only affected by speckle but also affected by various other factors and the image resolution is often coarser than the wide of the corresponding objects. In this paper, an algorithm is developed based on line-support regions of similar gradient orientation and the Radon-transform. It was found that this approach works fairly well for the images where the ship wakes are by no means distinct.

关键词： Marine vehicles Image edge detection Speckle Radar detection Surface fitting Transforms Extraterrestrial measurements Space technology Object detection Computer vision

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Toward an actualization of social intelligence in human and robot collaborative systems

Toward an actualization of social intelligence in human and ...

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2004 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

作者： Nakajima, Hiroshi Brave, Scott Maldonado, Heidy Arao, Masaki Morishima, Yasunori Yamada, Ryota Nass, Clifford Kawaji, Shigeyasu Control Technology Laboratory OMRON Corporation Kyoto Japan Department of Communication Stanford University CA United States School of Education Stanford University CA United States Division of Languages International Christian University Tokyo Japan Department of Systems Engineering Kumamoto University Kumamoto Japan

ISBN: (纸本)0780384636

As robot technology is evolving and creating a social community between humans and robots, it is necessary to research and develop a new type of intelligence, which we refer to as "social intelligence". Social intelligence enables natural and socially appropriate interactions. Its importance is gaining a growing interest among not just the human-computer interaction researchers but also robot technology researchers and developers. This article discusses the definition, importance, and benefits of social intelligence in human and robot collaborative systems. The virtual social environment is employed to implement an experimental social intelligence system because of its low cost and high flexibility. Software robots (i.e. agents) with the social intelligence model have been implemented by featuring an emotion model and a personality model under the virtual environment. The social intelligence model that handles affective responses is based on the theories of personality, emotion, and human-media interaction such as cognitive appraisal theory and Media Equation. The experiment was conducted with the virtual learning collaborative system to examine the effect of the social intelligence model in the collaborative system. The data showed that the users had more positive impressions about the usefulness and the application and learning experience when the cooperative agent displayed some social responses with personality and emotions. It should be noted here that the cooperative agent did not provide any explicit assistance for the human user such as giving clues and showing answers, and yet the user's evaluation on the usefulness of the learning system was influenced by the social agent. The data also suggested that the cooperative agent contributed to the effectiveness of the learning system.

关键词： Robots

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MIS-Grid for Future Mobile communications

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Journal of Electronic Science and technology of China 2004年第4期2卷 12-15,36页

作者：马建国邢玲李在铭 School of Information and Control Engineering Southwest University of Science&TechnologySichuan Mianyang 621002China School of Communication and Information Engineering UESTCChengdu 610054China Dept.of Electronic Engineering and Information Science University of Science and Technology of ChinaHefei 230027China

The dilemma of modern mobile communications technology is analyzed. Aiming at some problems in the 3G systems, a new network architecture is proposed on the principle of mobile information sharing grid (MIS-Grid). The essence of MIS-Grid is to transfer the hot wide band information with cheap unidirectional broadcasting channels and the personalized services with relatively expensive interactive networks.

关键词： beyond 3G, MIS-Grid grid mobile communications information sharing

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An adaptive medium access control protocol for robot inter-communication in autonomous distributed systems

An adaptive medium access control protocol for robot inter-c...

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International Conference on Advanced Information Networking and Applications (AINA)

作者： J. Arai A. Koyama L. Barolli Graduate School of Science and Engineering Yamagata University Japan Department of Information and Control Engineering Yamagata College of Industry and Technology Japan Department of Informatics Yamagata University Japan Department of Information and Communication Engineering Fukuoka Institute of Technology Japan

In autonomous distributed robot systems many robots cooperate together to carry out many difficult tasks that single robots can not realize. But, in order to cooperate together the robots should communicate with each other. Therefore, the inter-communication among robots is very important problem to be solved. We propose an adaptive reservation-time division multiple access (AR-TDMA) medium access control protocol which can realize a real-time communication among robots in a heterogeneous environment by using a reservation mechanism. Also, by using an adaptive time slot allocation method, the protocol has a flexible behavior and can deal with the changes of number of robots. Furthermore, the proposed protocol can reduce the packet collision probability.

关键词： Programmable control Adaptive control Media Access Protocol Access protocols Service robots Medical robotics Multiaccess communication Mobile communication Time division multiple access control engineering

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A novel three-phase line-interactive UPS system with parallel-series active power-line conditioning capabilities using AC line reactor

A novel three-phase line-interactive UPS system with paralle...

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Annual Conference of Industrial Electronics Society

作者： Jun-Keun Ji Jang-Hwan Kim Seung-Ki Sui Hyo-sung Kim Division of Information & Technology Engineering Soonchunhyang University Asan Gyeongnam South Korea Division of Information & Technology Engineering Soonchunhyang University Asan-Si Chungnam Korea School of Electrical Engineering and Computer Science Seoul National University Seoul Korea Department of Control & Measurement Engineering Cheonan National Technical College Cheonan Chungnam Korea

ISBN: (纸本)0780387309

In this paper a novel three-phase line-interactive UPS system with parallel-series active power-line conditioning capability using AC line reactor and two four-leg voltage source converter (VSC) is proposed. The four-leg VSC can use the DC-link voltage effectively by the 3-D SVPWM method. Hence the DC battery voltage can be reduced by 15% in comparison to that of the conventional line-interactive UPS system. The parallel inverter operating as a shunt active filter is a controlled voltage source and controls the three-phase line voltage independently in order to control the source current. It eliminates the neutral line current and the active ripple power of the source side using the dqo transformation so that unity power factor and the sinusoidal source current can be achieved even though both the source and the load voltages have zero sequence components. The series inverter operating as dynamic voltage restorer (DVR) compensates the load voltage and allows it to be balanced and harmonic-free. Both of the series and shunt inverters always act as independently controllable voltage sources, so that the three-phase output voltage can show a seamless transition to the backup mode. The feasibility of the proposed UPS system has been investigated and verified through experimental results.

关键词： Uninterruptible power systems Inductors Voltage control Inverters Converters Power conversion Shunt (electrical) Space vector pulse width modulation Batteries Active filters

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