Displacement detection system with twist error correcting function

Abstract

The invention relates to a displacement detection system, in particular to a displacement detection system with a twist error correcting function. The problem that the measurement precision of a measuring instrument cannot be fully used because of the mechanical structure precision or the mounting precision of a machine tool while the traditional measurement technology is designed according to the measurement precision of the measuring instrument is solved. The system comprises a first standard raster, a second standard raster, a sampling control module, a first position signal probing system, a second position signal probing system and a position analyzing module, wherein the first position signal probing system and the second position signal probing system send sampling signals through the sampling control module together; and the position analyzing module weighs the two displacement signals and averagely calculates the displacement value of a moving body by analyzing and comparing the displacement signals from the first position signal probing system and the second position signal probing system. The displacement detection system is used for improving reading stability and self-detection ability of a measurement system, and eliminating or reducing a twist error to the greatest extent at the same time.

Description

technical field [0001] The invention relates to a displacement detection system, in particular to a displacement detection system with the function of correcting torsion errors. Measuring system for measuring lengths with high precision and stability. Background technique [0002] The grating line displacement measurement system is mainly used as the position feedback element in the closed-loop control in the numerical control. Its accuracy and reliability affect the machining accuracy. The advantage of the full-closed loop compared with the semi-closed loop is mainly that it can eliminate transmission errors. For machining tool position and workpiece Direct measurement of position. The accuracy of grating rulers at home and abroad has been able to meet higher measurement accuracy requirements, but the installation accuracy of domestic machine tools is not high enough, making it difficult for the high-precision advantages of high-precision measuring instruments to be fully ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing displacement measurement technology, the present invention is mainly designed for the measurement accuracy of the measuring instrument itself. Although it can achieve high measurement accuracy, due to the mechanical structure accuracy or installation accuracy of the machine tool itself, the measuring instrument itself cannot The measurement accuracy cannot be fully utilized. In order to improve the stability of the system displacement measurement on the basis of the accuracy of the existing machine tool design, minimize the deviation caused by the non-linearity of the orbital motion, and reduce the requirements for installation accuracy , providing a displacement detection system with the function of correcting torsion error

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