학술논문
Analysis of magnetoresistive sensors for nondestructive evaluation
Document Type
Conference
Author
Source
2018 IEEE Sensors Applications Symposium (SAS) Sensors Applications Symposium (SAS), 2018 IEEE. :1-4 Mar, 2018
Subject
Language
Abstract
Magnetoresistive (MR) sensors are trending in the industry due to their ease of use and their capability of maintaining the signal under investigation without destruction. MR sensors usually offer a reliable measurement of the change in magnetic field. With an understanding of the relationship between variation in magnetic field and the parameter under investigation, many parameters can be measured such as eddy currents or stray fields. This requires post signal processing as well as understanding of how to relate the quantity measured with what is required. However, MR sensors can measure DC and AC signals of frequency up to hundreds of MHz. This paper characterizes different MR sensors commercially available and discusses how they can be employed for non-destructive applications in the industry. MR sensors are found to exhibit high sensitivity up to 1005 mV/V/mT with small hysteresis of about 3% for TMR sensors.