光学连续闭环光电编码器误差检测系统  

Error detection system of photoelectric encoder based on optical continuous closed-loop

作　　者：李锟 丁红昌[1,3] 曹国华 侯翰[1] Li Kun;Ding Hongchang;Cao Guohua;Hou Han(School of Mechanical and Electric Engineering,Changchun University of Science and Technology,Changchun 130022,China;Engineering Training Center,Changchun Institute of Technology,Changchun 130012,China;Chongqing Research Institute,Changchun University of Science and Technology,Chongqing 401135,China)

机构地区：[1]长春理工大学机电工程学院,吉林长春130022 [2]长春工程学院工程训练中心,吉林长春130012 [3]长春理工大学重庆研究院,重庆401135

出　　处：《红外与激光工程》2022年第7期312-319,共8页Infrared and Laser Engineering

基　　金：国家重点研发计划(2017 YFF0105304);吉林省科技发展计划(20200401117 GX);长春工程学院青年基金(320210006)。

摘　　要：为了解决光电编码器误差检测精度低、光机结构复杂、检测周期长等问题,利用自准直仪与多面棱体的光学小角度测量原理及转角互逆双轴转台的连续误差检测方法,建立了光学连续闭环光电编码器误差检测系统;采用多体系统理论与相对位姿矩阵变换方法,建立了双轴转台全误差模型,分析了固定误差和可变误差对系统的影响;利用标定自准直仪与23面棱体对检测系统进行了校准,并利用高精度光电编码器与系统进行了精度对比验证。结果表明:检测系统的双轴回转精度满足数值仿真计算要求,系统精度可达0.38″,测量不确定度为0.2″(k=2),系统检测精度与实际编码器出厂时标定的准确度基本一致,验证了光学连续闭环光电编码器误差检测系统实现高精度和全圆周连续误差检测的可行性。In order to solve the problems of low accuracy,complex optical machine structure,and long detection cycle in the error detection of the photoelectric encoder,the optical small-angle measurement principle of an autocollimator and a polyhedral prism,and the continuous error detection method of the reciprocal rotation angle of the dual-axis turntable were combined to establish an error detection system for photoelectric encoder based on optical continuous closed-loop.By using the multi-body system theory and the relative pose matrix transformation method,a full error model of the dual-axis turntable was established,and the influence of the fixed error and variable error of the full error model on the system was analyzed.The detection system was calibrated with a calibrated autocollimator and a 23-sided polyhedral prism,and a high-precision photoelectric encoder was used to compare the detection accuracy with the system.The test results show that the rotation accuracy of the dual-axis had met the requirements of the numerical simulation calculations,the system detection accuracy had reached0.38 ″,and the measurement uncertainty is 0.2 ″(k=2).And for the encoder actually produced,the detection accuracy of the system is basically the same as the accuracy of the factory calibration.Which had been verified the feasibility of the optical continuous closed-loop system to achieve high precision and circumference continuous error detection.

关 键 词：光电编码器 误差检测 光电自准直仪 误差建模 转台 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]