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《Journal of Optoelectronics.Laser》 2008-04
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Accurate measurement method for parameters of quartz pendulous reed based on the vision image

TONG Qing-bin 1,DING Zhen-liang1,WANG Yan2,YUAN Feng1(1.School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China;2.School of Mechtronic Engineering,Harbin Institute of Technology,Harbin 150001,China)  
In order to solve the problem that quartz pendulous reed(QPR)is easily scratched and improve the speed and accuracy of the detection,a novel non-contact measurement method based on the visual image to acquire the geometrical plane parameters of QPR is presented in this paper.The images of QPR are obtained by the system of vision,and Sobel operator is used to calculate the gray-level gradient image and locate one pixel accuracy;then the sub-pixel positioning algorithm of Zernike moments operator is used to calculate the accurate locations of object edges;finally,by least-squares fitting to the edge,the geometrical plane parameters of QPR can be obtained.The experimental results show that the locating accuracy of this method is superior to 0.1 pixel.
【Fund】: 中国运载火箭技术研究院230厂资助
【CateGory Index】: TP274
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