Development of characteristic test system for GMR sensor

Author

Lu Jixi ; Huang Shanshan ; Pan Kaikai ; Qian Zheng ; Chen Niya

Author_Institution

Sch. of Instrum. Sci. & Opto-Electron. Eng., Beihang Univ., Beijing, China

fYear

2012

fDate

11-13 July 2012

Firstpage

20

Lastpage

23

Abstract

In order to test the characteristics of giant magneto-resistance (GMR) sensor comprehensively and accurately, a test system based on 3D Helmholtz coil is designed. The coil can generate sine magnetic field in the range of -10mT to 10mT, 0Hz to 500Hz in three vertical dimensions. The static and low-frequency characteristics of a GMR sensor are tested and analyzed. The dynamic test results reveal that GMR sensor should be applied in unipolar magnetic in its linear range in which case maximal error is still as large as 20% mainly caused by hysteresis. In order to increase the accuracy furthermore in measuring dynamic instantaneous magnetic induction, appropriate hysteresis compensation methods should be analyzed and applied in further research.

Keywords

electromagnetic induction; giant magnetoresistance; hysteresis; magnetic field measurement; magnetic sensors; 3D Helmholtz coil; GMR sensor; characteristic test system development; dynamic instantaneous magnetic induction measurement; frequency 0 Hz to 500 Hz; giant magneto-resistance sensor; hysteresis compensation methods; low-frequency characteristics; magnetic flux density -10 mT to 10 mT; sine magnetic field; static frequency characteristics; unipolar magnetic; Coils; Current measurement; Generators; Magnetic field measurement; Magnetic fields; Magnetic hysteresis; RLC circuits; 3D Helmholtz coil; GMR sensor; characteristic test;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Control Technology (ISICT), 2012 8th IEEE International Symposium on

Conference_Location

London

Print_ISBN

978-1-4673-2615-5

Type

conf

DOI

10.1109/ISICT.2012.6291643

Filename

6291643