中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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The design of the data communication and display system based on GeoCOM technology (EI CONFERENCE) 会议论文  OAI收割
2012 5th International Symposium on Computational Intelligence and Design, ISCID 2012, October 28, 2012 - October 29, 2012, Hangzhou, China
Geng T.-W.; Wang Z.-Q.; Li D.-N.; Shen C.-W.
收藏  |  浏览/下载:20/0  |  提交时间:2013/03/25
The design of analog video data grabber system based on TMS320VC33 and SAA7111A (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China
作者:  
Liu S.-J.
收藏  |  浏览/下载:15/0  |  提交时间:2013/03/25
Miniature field bus data recorder (EI CONFERENCE) 会议论文  OAI收割
2010 WASE International Conference on Information Engineering, ICIE 2010, August 14, 2010 - August 15, 2010, Beidaihe, Hebei, China
Chen C.-Q.; Ji Y.
收藏  |  浏览/下载:28/0  |  提交时间:2013/03/25
The common bus on bus control is RS232. With the development of field bus technology  field bus technology is widely used in data recorder. How to real time record the data of field bus in the experiment and provide the test data for process reconstruction is a very important problem. This paper introduces a kind of data acquisition and storage based on field bus. Its core design is C8051F040 microprocessor and SJA1000  a widely used field bus controller. This paper presents the basic constitution of this field bus data recorder and set forth its hardware and software. This field bus data recorder field bus real-time gathers the information and storage data on the CF card. The result of the experiment shows the system is highly reliable for data acquisition and storage  which should have abroad application prospect for data record experiment. 2010 IEEE.  
Design of CAN bus interface for photoelectric encoder in the spaceflight camera (EI CONFERENCE) 会议论文  OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者:  
Wan Q.-H.;  She R.-H.;  Sun Y.;  Sun Y.
收藏  |  浏览/下载:20/0  |  提交时间:2013/03/25
In order to make photoelectric encoder usable in a spaceflight camera which adopts CAN bus as the communication method  CAN bus interface of the photoelectric encoder is designed in this paper. CAN bus interface hardware circuit of photoelectric encoder consists of CAN bus controller SJA 1000  CAN bus transceiver TJA1050 and singlechip. CAN bus interface controlling software program is completed in C language. A ten-meter shield twisted pair line is used as the transmission medium in the spaceflight camera  and speed rate is 600kbps.The experiments show that: the photoelectric encoder with CAN bus interface which has the advantages of more reliability  real-time  transfer rate and transfer distance overcomes communication line's shortcomings of classical photoelectric encoder system. The system works well in automatic measuring and controlling system. 2009 SPIE.  
A high-speed acquisition and processing system of the laser speckle signal on the magnetic fluid (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
作者:  
Sun Y.;  Sun Y.;  Wan Q.-H.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
In order to achieve the dynamical detection and real-time analysis of the movement status of the magnetic fluid  according to the difficulties of the detection of the magnetic fluid  established a high-speed acquisition and processing system of laser speckle signal on the magnetic fluid. First of all  the FPGA (EP2C8T144C8N) drived the linear array CCD(TCD1501D) to scan in the corresponding time sequence given by the computer  collected the laser speckle interferometric image in rapid change on the surface of the magnetic fluid  which followed the movement of the magnetic fluid  and the signal collected by CCD was converted into the digital data through the high-speed A/D convertor and stored into the internal buffer FIFO of the FPGA  whose width and depth were designed by the user as required. Then  the FPGA sent the digital signal of the laser speckle interferometric images into the computer through the USB2.0 highspeed differential bus  whose transmission rate can reach 480Mb/s in theory. Finally  the distribution of the laser speckle on the magnetic fluid was messy and random  which carried certain information about the surface of the magnetic fluid  based on the theories of the statistic correlation and the subdivision of images  analysing and processing the laser speckle interferometric images  indirectly got the movement status of the magnetic fluid under the electromagnetic field. The experimental results show that: the High Speed Acquisition and Processing System has the advantage of full-court  non-contact  non-invasive  high-precision and high reliability and so on. The detection resolution of high speed acquisition and processing system is superior to 1m and the sample rate is 3Msps  which basically meets the requirements of the magnetic fluid movement state detection. 2009 SPIE.  
基于CMX869的高速低功耗调制解调器的设计 期刊论文  OAI收割
电声技术, 2005, 期号: 07, 页码: 27-30
高长艳; 刘维亚; 郑喜凤; 丁铁夫
收藏  |  浏览/下载:15/0  |  提交时间:2013/03/11