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《Journal of Data Acquisition & Processing》 2001-01
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Signal Process Method of Diameter Measurement System with Protection Method

Li Weimin Ren Lizhong Xing Xiaozheng Hu Hongzhuan Zhai Chao Li Jing Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China Hefei 230027,P.R.China  
A signal process method in diameter measurement system using projection and magnification method with linear CCD sensor. This paper proposes a CCD signal pre-treating method with HPF and LPF and analyzes the image edge-detecting algorithm based on differential method. The absolute value of the first-order differential value is obtained and its local center of gravity as the characteristic point of the edge is calculated by the algorithm. The experimental result shows that the repeated precision of the measurement system using center of gravity algorithm based on differential method is less than 1 μm. Finally, the linear and nonlinear ca-librate method of the measurement system is introduced.
【CateGory Index】: TP274
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