时栅角位移传感器误差修正及其测试系统  

Error Calibration and Test System for Time Grating Angular Displacement Sensor

作　　者：高忠华[1,2] 陈锡侯[1] 郑方燕[1] 

机构地区：[1]重庆理工大学机械检测技术与装备教育部工程研究中心,重庆400054 [2]合肥工业大学仪器科学与光电工程学院,安徽合肥230009

出　　处：《仪表技术与传感器》2012年第9期75-77,共3页Instrument Technique and Sensor

基　　金：国家自然科学基金(51005263);教育部科学技术研究重点项目(KJ100827);重庆市教育委员会科学技术研究项目(KJ110808)

摘　　要：研制了一种全自动时栅角位移传感器测试系统,用来实现对传感器系统误差的修正。该系统采用光栅作为基准仪器,在一个圆周内分别采集若干个时栅角位移数据和光栅角位移数据,通过串行口送计算机。同时,ARM处理器根据计算机给定的设定值控制电机转过相应的角位移,实现了系统误差数据的自动采集。该系统中使用了一种基于最小二乘法误差修正算法,计算机根据该算法,对传感器的系统误差进行自动修正,修正后的精度可达±1″。An automatic test system for time grating angular displacement sensor was developed to calibrate system errors of the sensor. Signals of optical grating（ used as the criterion instrument ） and time grating sampled respectively form a circle of sen- sots are sent to computer by serial port. Meanwhile, motor turns corresponding angular displacement controlled by ARM according to the setting value given by the computer. Data auto-acquisition of system errors was consequently realized. An error calibration algo- rithm was used based on the least square method （LMS） in this test system. System error calibration is automatically made for time grating by the computer according to this algorithm and the precise of time grating can reach to ± 2＂ after calibrating.

关 键 词：时栅 误差修正 自动测试 

分 类 号：TP206[自动化与计算机技术—检测技术与自动化装置]