用于涡流无损检测的高灵敏度各向异性磁阻磁力计。

Highly sensitive anisotropic magnetoresistance magnetometer for Eddy-current nondestructive evaluation.

作者信息

He D F, Tachiki M, Itozaki H

机构信息

Superconducting Materials Center, National Institute for Materials Science, 1-2-1 Sengen Tsukuba Ibaraki 305-0047, Japan.

出版信息

Rev Sci Instrum. 2009 Mar;80(3):036102. doi: 10.1063/1.3098946.

DOI:10.1063/1.3098946

PMID:19334957

Abstract

Using a commercially available anisotropic magnetoresistance (AMR) sensor of HMC1001, we developed a sensitive magnetometer. It could operate in amplifier mode or feedback mode. The magnetic field sensitivity of the AMR sensor was about 3.2 mV/V G. When the AMR sensor was biased by a voltage of 24 V, the magnetic field resolutions of the AMR magnetometer were about 12 pT/square root(Hz) at 1 kHz and 20 pT/square root(Hz) at 100 Hz. We used the AMR magnetometer for Eddy-current nondestructive evaluation in unshielded environment.

摘要

我们使用市售的HMC1001各向异性磁阻（AMR）传感器开发了一种灵敏的磁力计。它可以在放大器模式或反馈模式下运行。AMR传感器的磁场灵敏度约为3.2 mV/V G。当AMR传感器由24 V电压偏置时，AMR磁力计在1 kHz时的磁场分辨率约为12 pT/√Hz，在100 Hz时为20 pT/√Hz。我们将AMR磁力计用于非屏蔽环境中的涡流无损检测。