A Rotary Magnetic Encoder Based on Time Grating
A novel design of a noncontact,low-cost magnetic rotational encoder is presented in this paper,which is a robust device,resistant to dust,oil and can be used in harsh environment.It includes three key parts: 1)Time grating,which is a base of the sensor;2)magnetic ring,which has 12 poles;3)TMR,which is magnet sensitive element.Base on Time grating,making use of TMR detect the variation of magnetic-flux and produce a signal that contains angular position information as the magnetic ring rotates together with the shaft.After processing,the measurement of angular position can be realized.At last,the performance of the sensor we designed is tested,the original error with the respect to theoretical angle is ± 0.04°,the resolution is 0.072°.It combines advantages both magnetic sensors and Time grating,realize higher accuracy of measurement and resolution just use general mechanical parts.
Angular position measurement Time grating Magnetic encoder TMR
Zhang XuYun Wu ZhiYi Peng DongLin Wang ShuXian Zhang TianHeng
Engineering Research Center of Mechanical Testing Technology and Equipment,Ministry of Education,Chongqing University of Technology,Chongqing 400054,China
国内会议
成都
英文
442-446
2016-10-14（万方平台首次上网日期，不代表论文的发表时间）