Title :
The Development of Magnetic Rotary Encoder System Based on High Resistivity MR Film Sensor for Automobile Speed-measuring
Author :
Zijian, Min ; Qingyong, Chen ; Wu, Zheng
Author_Institution :
Coll. oflnformation Eng., Capital Normal Univ., Beijing, China
Abstract :
To meet the need of automobile industry, a new kind of high resistivity MR (magneto resistance) film sensor with NiFeCr seed layer has been made. The magnetic rotary encoder system based on the sensor is designed. The system consists of the magnetic drum, magnetic head, amplification and shape circuit, quadruplicated frequency circuit, measure and display unit, etc. The characteristics of this system include simple structure, anti-adverse circumstance, fast response speed, low cost and high reliability. The system fits especially to automobile speed measuring.
Keywords :
amplifiers; automobile industry; automotive electronics; magnetic heads; magnetic sensors; magnetoresistance; pulse shaping circuits; reliability; velocity measurement; amplification circuit; anti-adverse circumstance; automobile industry; automobile speed measuring; automobile speed-measuring; fast response speed; high resistivity MR film sensor; magnetic drum; magnetic head; magnetic rotary encoder system; magneto resistance film sensor; measure and display unit; quadruplicated frequency circuit; reliability; seed layer; shape circuit; simple structure; Automobiles; Clocks; Magnetic circuits; Magnetic separation; Perpendicular magnetic anisotropy; Resistors; magneto resistance; quadruplicated frequency; rotary encoder; speed measuring;
Conference_Titel :
Measuring Technology and Mechatronics Automation (ICMTMA), 2011 Third International Conference on
Conference_Location :
Shangshai
Print_ISBN :
978-1-4244-9010-3
DOI :
10.1109/ICMTMA.2011.767
