Encoder Grating Engraved-line Detection System Design Based on Machine Vision

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Wang, Zhihong^1 ; Zhang, Dandan^1

College of Instrumentation and Electrical Engineering, Jilin University, Changchun

130026, China^1

关键词: Design value;    Detection methods;    Encoder outputs;    Least Square;    Line detection;    Line fitting;    On-machines;    Real time performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/4/042108/pdf
DOI  :  10.1088/1755-1315/170/4/042108

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The detection of encoder grating engraved-line uniformity, is important in the encoder production debugging. Aiming at the shortcomings of the traditional method of signal processing using the encoder output, the real-time performance of the encoder is not strong, the operation is complex, the precision is not high, the debugging is inconvenient and so on, a black and white ratio detection method based on image processing is proposed. Using the CCD industrial camera to image acquisition and the edge image of the grating engraved-line is obtained by the image processing, and the edge of the grating line is obtained by the least squares straight line fitting. The actual black and white ratio is obtained by the ratio of the adjacent straight lines distance from the point to the two sides, Compared with the design value obtained by the black and white margin error to evaluate its uniformity. The experimental results show that the method can effectively to test the grating engraved-line uniformity.