光电编码器误差检测转台的动态精度标定

由于光电编码器动态检测转台的分辨率、精度和转速都比较高,传统检测手段很难精确标定该类转台的动态精度,故本文开展了转台动态精度标定方法的研究。首先,分析动态转台工作原理,指出了影响转台动态精度的主要因素。然后,研究了动态误差的主要特性,提出了一种基于动态重复性的转台动态精度标定方法。最后,设计了FPGA+USB的数据采集电路,实现了对转台动态精度的标定。对自行研制的转台进行了动态精度标定。标定结果显示:提出的动态精度标定方法能够实现对转台的标定,验证了该转台能够实现对被检编码器的动态检测,解决了研制动态转台时缺少动态检测精度标定方法的难题。

Calibration of dynamic precision for measurement platform of photoelectric encoder

The dynamic measurement platforms for photoelectric encoders are characterized by higher resolution ,higher accuracy ,and higher rotation speeds ,and traditional measurement methods are difficult to calibrate its dynamic measurement accuracy .So ,this paper proposes a calibration method for the measurement platforms . The working principle of the platforms was analyzed , and some factors effecting the measuring accuracy of the platforms was pointed out .The main characteristics of dynamic errors were researched and analyzed and a dynamic calibration method for the platforms was introduced based on its dynamic repetition characteristics . Finally ,a FPGA + USB data collection circuit was designed to use in the calibration method .The method was successfully utilized to calibrate some self-developed dynamic platforms . The results show that the method proposed is capable of calibrating dynamic rotation platforms ,and verify that the measurement platform can implement the dynamic measurement of photoelectric encoders . The method solves the problem of dynamic calibration for dynamic rotation platforms .