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

Volume

3

fYear

2011

fDate

6-7 Jan. 2011

Firstpage

778

Lastpage

780

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Measuring Technology and Mechatronics Automation (ICMTMA), 2011 Third International Conference on

Conference_Location

Shangshai

Print_ISBN

978-1-4244-9010-3

Type

conf

DOI

10.1109/ICMTMA.2011.767

Filename

5721604