摘要
针对时栅位移传感器因频率响应慢影响测量速率的问题,提出了一种电阻链移相结合数据处理的方法。利用电阻链对时栅输出信号进行移相处理,采用多路模拟选择器和整形输出电路对移相后的信号分时输出,运用可编程片上系统(SOPC)技术进行数据处理和误差补偿。实验结果表明:采用该方法采样频率由原来的400 Hz提高到12.8 k Hz,大幅度提高了现阶段时栅位移传感器的频率响应,使传感器实现了高速实时测量。同时能够有效地降低了随机误差,对极内的误差峰—峰值由1.5″降低为0.8″,测量精度提高了近1倍。
Aiming at the problem that measuring rate of time-grating displacement sensor is affected due to slow frequency response,,a method combining data processing and phase-shifting of resistance chains is proposed. The output signal of time-grating is phase-shifting processed by resistance chains and timeshare output by multiplexers and shaping output circuit,and the SOPC technology is used for data processing and error compensation.Experimental results show that the original sampling frequency of 400 Hz can be improved up to 1. 28 k Hz,which can substantially increase the frequency response of the time-grating displacement sensor,and high-speed realtime measurement is achieved. Meanwhile the random error is effectively reduced,the peak-peak value of error is decreased from 1. 5″ to 0. 8″ within antipode,and the measurement precision is nearly double improved.
出处
《传感器与微系统》
CSCD
2015年第9期51-54,57,共5页
Transducer and Microsystem Technologies
基金
国家高科技研究发展计划("863"计划)资助项目(2012AA041202)
作者简介
索龙博（1988-），男，陕西宝鸡人，硕士研究生，主要研究方向为计算机辅助测试技术与仪器。
陈锡侯，通讯作者，E-mail：cxh0458@163．com。
