两相非等节距时栅传感器的谐波修正  

Harmonic Wave Correcting Method of Two-Phase Unequal-Pitch Time-Grating Displacement Sensor

作　　者：王先全[1] 吴敏[2] 朱革[1] 冯济琴[1] 

机构地区：[1]重庆理工大学电子学院,重庆400050 [2]重庆理工大学车辆学院,重庆400050

出　　处：《西南大学学报（自然科学版）》2010年第3期146-151,共6页Journal of Southwest University(Natural Science Edition)

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);重庆市教委资助项目(KJ090609)

摘　　要：采用误差修正是提高两相非等节距时栅位移传感器精度的有效方法.首先,详细研究了两相非等节距时栅传感器的原理和误差组成,分析了长周期误差、短周期误差等误差特性.其次,提出了一种新型的谐波误差修正方法,它可以同时消除长周期误差和短周期误差,且不要求等间距采样,采样点数少,数据处理简单.最后,通过实验表明,该方法能大大提高传感器的精度.Error correction is an effective way to improve the accuracy of two-phase unequal-pitch time- grating displacement sensors. This paper introduces the principle of the two-phase unequal-pitch time-grating displacement sensor and the composition of its errors and analyzes the features of long-period errors and short-period errors. Based on such analyses, a new harmonic error correcting method is proposed, which can simultaneously eliminate long-period errors and short-period errors and does not require equidistant sampling. Compared with the traditional harmonic error correcting methods, this method is characterized by few sample points and simple data processing. Applied in an experiment, this method was shown to be able to enhance the accuracy of the sensor greatly.

关 键 词：传感器 时栅 电磁感应 极对数 谐波修正 

分 类 号：TH701[机械工程—仪器科学与技术]