A novel signal detection method of giant magneto-impedance magnetic sensors

被引：2
|
作者：
Zhang, Lei [1 ]
Pan, Zhongming [1 ]
Nie, Xinhua [1 ]
机构：
[1] Natl Univ Def Technol, Coll Mechatron & Automat, Changsha 410073, Hunan, Peoples R China
来源：
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL | 2013年 / 35卷 / 05期
关键词：
Correlation analysis; GMI; magnetic sensor; wavelet transform; MAGNETOIMPEDANCE;
D O I：
10.1177/0142331212463026
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
It is difficult to detect the signal of giant magneto-impedance (GMI) magnetic sensors with the signal-to-noise ratio (SNR) less than 0dB by the conventional detection methods. In this paper, a novel detection circuit of a GMI sensor is presented, which directly samples the conditioned signals from the GMI sensor into a digital signal processing system and then a hybrid method combining wavelet transform with correlation analysis is proposed, which is proved effective for measuring the weak magnetic field even when the SNR of the GMI sensor signals is as weak as -15dB.
引用
收藏
页码：625 / 629
页数：5
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