Research On Error Detection System Of Optical Encoder Code Line Uniformity

Photoelectric encoder is a digital precision measuring device.It has the advantages of high precision and low anti-interference ability.And widely used in the fields of industrial and national defense.Code disc is the core element of photoelectric encoder.The uniformity of the coder line affects the precision of the output signal of the encoder.Before the photoelectric encoder is assembled,it is of great practical significance to check the quality of the code disc.This paper studies the error detection methods of the existing photoelectric encoder code disc,and compares the advantages and disadvantages of those methods.Designed a photoelectric encoder code disc uniformity engraving-line error detection system by using CCD industrial camera acquire all of the encoder's peripheral scribed line image and according to the design of image processing algorithms for encoder engraving-line uniformity error detectionFirstly,the overall design scheme of the error detection system of the encoder disc engraving-line uniformity is proposed.The hardware structure of the error detection system is designed,including the rotation adjustment device and the lens position adjustment device and so on.Secondly,the image processing algorithm of encoder disc engraving-line uniformity is studied.We proposed that measure the homogeneity of encoder disc by the engraved-line error and designed an algorithm based on bidirectional black-to-white ratio.Using the calculation formula to analyze the accuracy of the algorithm and the feasibility of the algorithm is verified theoretically.Finally,through test,the paper evaluates the performance of the system.Through the work above,I completed research work on the error detection system for the code disc engraved-line uniformity of photoelectric encoder.This paper has important reference value for the research of the automatic detection system of the photoelectric encoder.