Application of GMR line sensor to detect the magnetic flux distribution for nondestructive testing

Issue title: Proceedings of the tenth International Symposium on Applied Electromagnetics and Mechanics ISEM-Tokyo

Article type: Research Article

Authors: Kataoka, Yasuhiro^a | Murayama, Shuhei^a | Wakiwaka, Hiroyuki^{a; *} | Shinoura, Osamu^b

Affiliations: [a] Shinshu University, 4-17-1 Wakasato, Nagano-shi, 380-8553 Nagano, Japan | [b] TDK Co. Ltd., 2-15-7 Higashi-Ohwada, Ichikawa-shi, 272-9178 Chiba, Japan

Correspondence: [*] Corresponding author: Fax: +81 26 269 5190; E-mail: [email protected]

Abstract: We have developed a GMR line sensor which can arrange many GMR elements in a line on a polyimide film. This GMR line sensor detects the magnetic field distribution in a plane by only a single scan. We use the multilayer GMR element. This element can detect a magnetic field impress from directions of an element length and an element width. And the GMR line sensor has omnidirectional magnetic sensitivity. We applied this sensor to a nondestructive magnetic leakage flux testing. The output of this sensor does not depend on the direction of leakage flux, therefore, this sensor can detect any direction of defect. Using the GMR line sensor, the shape of the defect will be identified by a single scan.

DOI: 10.3233/JAE-2002-427

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 15, no. 1-4, pp. 47-52, 2002