基于DSP的时栅位移传感器误差在线处理与系统设计  

Error Processing and System Designing for Time Grating Displacement Sensor Based on DSP

作　　者：王先全[1,2] 雷毅谈 张虹光 朱桂林[1,2] 余尧[1,2] 

机构地区：[1]重庆理工大学电子信息与自动化学院,重庆400054 [2]重庆理工大学时栅传感及先进检测技术重庆市重点实验室,重庆400054

出　　处：《传感技术学报》2014年第8期1054-1059,共6页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(51275551);重庆市自然科学基金项目(cstc2012jjA40062);重庆市"科慧杯"研究生创新实践大赛项目(61214)

摘　　要：概要分析时栅传感器的幅值误差、正交误差、相移误差等误差因素以及其对检测精度的影响,给出了对上述各误差进行在线检测的方法,同时通过信号合成、数字滤波与延迟补偿等方法联合消除误差影响,提高了系统测量精度。为实现上述方法,进而提出一种以DSP为处理核心的新型一体化系统信号处理解决方案。该方案将信号产生、数据采样控制、误差检测、位移解算与误差修正等数据处理集成到一片DSP内,压缩了系统硬件空间,提高了系统综合性能。实验表明:经过误差处理后,72对极传感器系统的误差从±128.4″减少至±1.7″。This paper gives a general analysis of the deviation factors such as inequality in amplitude,non-orthogonality error,or phase shift error and their impacts on measurement precision of the Time Grating Displacement Sensor.A method of detecting the above errors online together with the signal synthesis,digital filter and delay compensation techniques to eliminate errors and improve the accuracy of measurement system is also given in the paper.In order to realize the above aim,a new-type all-in-one systematic signal processing program based on DSP technique is furtherly put forward.This program integrates the functions of signal generation,data sampling control,error detection,displacement solution and error compensation into a DSP chip,with system hardware space compressed and comprehensive performance of system enhanced.Experiments show that：the deviation of the 72 antipode measuring system is reduced from ±128.4″to ±1.7″after error processing.

关 键 词：传感器 角位移测量 误差处理 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]