基于谐波修正的两相非等节距时栅传感器  

Two-Phase Unequal-pitch Time-grating Displacement Sensor Based on Harmonic Wave Correcting Method

作　　者：王先全[1] 吴敏[2] 朱革[1] 冯济琴[1] 

机构地区：[1]重庆理工大学电子信息与自动化学院,重庆400050 [2]重庆理工大学重庆汽车学院,重庆400050

出　　处：《重庆工学院学报（自然科学版）》2009年第4期79-85,共7页Journal of Chongqing Institute of Technology

基　　金：国家自然科学基金资助项目(50575235);重庆市自然科学基金资助项目(2008BB2336)

摘　　要：通过研究三相、两相时栅传感器的信号模型,设计了一种新型位移传感器——两相非等节距时栅位移传感器.该传感器在不增加加工难度的情况下,提高了传感器的极对数.通过分析传感器的误差组成,研究了误差谐波修正法理论,提出了一种新的非等间距采样误差修正方法.该方法消除误差的效果与等间距整周期采样误差修正相似,但采样点数要少得多.实验表明,采用新型位移传感器能提高传感器的精度.Through studying three-phase, two-phase signal model of time-grating sensor, this paper proposes a new type of displacement sensor-two-phase unequal-pitch time-grating displacement sensor, whose feature is that the number of pole-pairs is enhanced , but the difficulty of processing cases does not increase. By analyzing the composition of sensor error and studying error Harmonic wave Correcting theory in detail, a new error correcting method based on non-equidistant sampling is proposed, whose error-eliminating effect resembles the whole cycle of sampling error correcting method, but with much less sampling points. Experiments show that both methods can greatly enhance the accuracy of the sensor.

关 键 词：传感器 时栅 电磁感应 极对数 谐波修正 

分 类 号：TM966[电气工程—电力电子与电力传动]