Electronic method for suppressing output instability of GMI sensors caused by the orientation

IEICE Electronics Express

Zhongming Pan¹  Zhang Zhuohang¹  Wenna Zhang¹  Dasha Zhang¹ 

[1] College of Mechantronics Engineering and Automation, National University of Defense Technology

关键词: giant magneto-impedance effect;    magnetic sensor;    bias magnetic field;    orientation;    feedback control;   

DOI  :  10.1587/elex.15.20171183

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

Magnetic sensors based on the giant magneto-impedance effect (GMI sensors) have a promising application prospect in the field of magnetic anomaly detection for their high resolution. However, they are highly sensitive to its orientation without any magnetic shielding. A method that automatically adjusts the bias magnetic field to make it always work on its initial value is proposed in order to suppress output instability of GMI sensors caused by the orientation. The analog circuit implementing the method is designed according to the principle of feedback control. The experimental results demonstrated the effectiveness of the proposed method.

【 授权许可】

CC BY