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浏览/检索结果: 共8条,第1-8条 帮助

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The shape edge measure of automobile airbag based on image processing (EI CONFERENCE) 会议论文  OAI收割
2012 IEEE 5th International Conference on Advanced Computational Intelligence, ICACI 2012, October 18, 2012 - October 20, 2012, Nanjing, China
作者:  
Li Y.;  Wang Z.;  Wang Z.
收藏  |  浏览/下载:34/0  |  提交时间:2013/03/25
At present  micrometer is used for measure the shape edge of automobile airbag. There are some shortcomings in this method. The number of test points is limited. Test data is not comprehensive. Detection speed is slow and a fixture can only test a kind of airbag. The method of airbag shape edge detection based on image processing is researched in this paper. The image of airbag is collected by CCD  and then it is sent to the computer to be processed and segmented. The edge of image is extracted through Canny edge detection algorithm in order to acquire shape edge of airbag in this paper  and the image similarity degree are calculated to provide the information of matching in the template matching process. Finally the comprehensive test shape edge of airbag is realized. The experimental results show that the detection method is effective feasible  intuitive and clear. 2012 IEEE.  
Combustion characteristics of test and reserch on electronic control fuel injection system of cars GDI engine (EI CONFERENCE) 会议论文  OAI收割
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
Zhao X.; Xiong W.
收藏  |  浏览/下载:22/0  |  提交时间:2013/03/25
Earth elevation map production and high resolution sensing camera imaging analysis (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者:  
Dai L.
收藏  |  浏览/下载:145/0  |  提交时间:2013/03/25
The Earth's digital elevation which impacts space camera imaging has prepared and imaging has analysed. Based on matching error that TDI CCD integral series request of the speed of image motion  statistical experimental methods-Monte Carlo method is used to calculate the distribution histogram of Earth's elevation in image motion compensated model which includes satellite attitude changes  orbital angular rate changes  latitude  longitude and the orbital inclination changes. And then  elevation information of the earth's surface from SRTM is read. Earth elevation map which produced for aerospace electronic cameras is compressed and spliced. It can get elevation data from flash according to the shooting point of latitude and longitude. If elevation data between two data  the ways of searching data uses linear interpolation. Linear interpolation can better meet the rugged mountains and hills changing requests. At last  the deviant framework and camera controller are used to test the character of deviant angle errors  TDI CCD camera simulation system with the material point corresponding to imaging point model is used to analyze the imaging's MTF and mutual correlation similarity measure  simulation system use adding cumulation which TDI CCD imaging exceeded the corresponding pixel horizontal and vertical offset to simulate camera imaging when stability of satellite attitude changes. This process is practicality. It can effectively control the camera memory space  and meet a very good precision TDI CCD camera in the request matches the speed of image motion and imaging. 2010 SPIE.  
Angular rate of test table based on high-speed non-contact measurement (EI CONFERENCE) 会议论文  OAI收割
9th International Conference on Electronic Measurement and Instruments, ICEMI 2009, August 16, 2009 - August 19, 2009, Beijing, China
作者:  
Yang L.;  Zhao Y.;  Zhao Y.;  Zhao Y.;  Yang L.
收藏  |  浏览/下载:145/0  |  提交时间:2013/03/25
This article will introduces a high-speed non-contact method that can measures the angular rate of a test table though an objective perspective. This method adopts a collimator tube that can be measured as a target fixed to the test table  and the target corresponds to the angular position of the test table. In the process of the table rotating  the camera will to keep track of the objective at a high speed. Due to the high sampling frequency of the high-speed camera  instantaneous angular rate of test table can be measured. With pixel subdivision technology  its measuring accuracy can be up to 0.02 pixels. We use this methods measured a low-speed test table's angular rate and analyzed the data. The error analysis shows when the rate of the test table is 0.20/s  the accuracy of the method can achieve 0.0220%. 2009 IEEE.  
Design-for-testability features and test implementation of a giga hertz general purpose microprocessor 期刊论文  iSwitch采集
Journal of computer science and technology, 2008, 卷号: 23, 期号: 6, 页码: 1037-1046
作者:  
Wang, Da;  Hu, Yu;  Li, Hua-Wei;  Li, Xiao-Wei
收藏  |  浏览/下载:21/0  |  提交时间:2019/05/10
Design-for-Testability Features and Test Implementation of a Giga Hertz General Purpose Microprocessor 期刊论文  OAI收割
JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY, 2008, 卷号: 23, 期号: 6, 页码: 1037-1046
作者:  
Wang, Da;  Hu, Yu;  Li, Hua-Wei;  Li, Xiao-Wei
  |  收藏  |  浏览/下载:19/0  |  提交时间:2019/12/16
Design-for-Testability Features and Test Implementation of a Giga Hertz General Purpose Microprocessor 期刊论文  OAI收割
Journal of Computer Science and Technology, 2008, 卷号: 23, 期号: 6, 页码: 1037-1046
作者:  
Da Wang(王 达);  Yu Hu(胡 瑜);  Hua-Wei Li(李华伟);  Xiao-Wei Li(李晓维)
  |  收藏  |  浏览/下载:21/0  |  提交时间:2010/11/02
A loop-based apparatus for at-speed self-testing 期刊论文  OAI收割
JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY, 2001, 卷号: 16, 期号: 3, 页码: 278-285
作者:  
Li, XW;  Cheung, PYS
  |  收藏  |  浏览/下载:16/0  |  提交时间:2019/12/16