多读数头位移传感器原理及误差谐波修正

2018-07-26

作者：赵婷婷，王先全，王恋，文成杨，方怡单位：重庆理工大学；时栅传感及先进检测技术重庆重点实验室

摘要：为提高传感器的精度，提出了一种构建多读数头位移传感器的方法，在不增加刻线槽的情况下，可大幅提高传感器的对极数，该传感器误差成分比传统传感器的谐波误差成分少，且谐波误差幅值小，有利于提高传感器的精度。详细研究了传感器误差组成和误差谐波修正法理论，提出了对极内单点采样的误差修正方法。与对极内多点采样修正方法相比，误差修正效果一致，但采样点数较少。通过试验证明，对极内单点采样误差修正方法可提高传感器的精度。

关键词：多读数头：对极数：谐波修正：对极内单点采样：对极内多点采样

中图分类号：TG87；TH741文献标志码：A

Principle of Multiple Reading Head Displacement Sensor and

Error Harmonic Wave Correcting

Zhao Tingting，Wang Xianquan，Wang Lian，Wen Chengyang，Fang Yi

Abstract:In order to improve the accuracy of the sensor，a method of constructing multireading head displacement sensor is put forward to greatly improve the pole number of the sensor without increasing the track groove.The error component of the multireading head is less than the harmonic error component of the tradition sensor.The harmonic error amplitude is small，which is helpful to improve the accuracy of the sensor.Detailed study of error composition and error harmonic correction theory.Proposed singlepoint sampling in polarity error correction method.Compared with the multipoint sampling in polarity error correction method，the error correction effect is the same，but the number of sampling points is less.Through experiments，singlepoint sampling in polarity error correction method can improve the accuracy of the sensor.

Keywords:multimeasuring head；number of polepairs；harmonic correction；singlepoint sampling；multipoint sampling