Flux-focusing eddy current sensor with magnetic saturation for detection of water pipe defects

Issue title: Proceedings from the 17th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2015)

Guest editors: Fumio Kojima, Futoshi Kobayashi and Hiroyuki Nakamoto

Article type: Research Article

Authors: Horai, Satoru^* | Hirata, Katsuhiro | Niguchi, Noboru

Affiliations: Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University, Osaka, Japan

Correspondence: [*] Corresponding author: Satoru Horai, Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University 2-1, Yamadaoka, Suita, Osaka, 565-0871, Japan. E-mail:[email protected]

Abstract: In Japan, deteriorated water pipes are increasing more and more now. Therefore, the setting of the priority to update these pipes effectively is required. As a solution of this problem, we proposed a new sensor using the principle of SLOFEC [1] and the structure of a focusing eddy current sensor [2]. In this paper, we verify the performances of the proposed sensor by 3D-FEM analysis. The effectiveness of the proposed sensor is also verified through measurements on a prototype.

Keywords: Water pipe, SLOFEC, eddy current sensor, finite element analysis

DOI: 10.3233/JAE-162099

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1231-1236, 2016