Reconstruction of multiple cracks in an ECT round-robin test

Issue title: Special Volume: Proceedings of the eleventh International Symposium on Applied Electromagnetics and Mechanics ISEM-Versailles ISEM 03

Article type: Research Article

Authors: Rebican, Mihai^{a; *} | Yusa, Noritaka^a | Chen, Zhenmao^a | Miya, Kenzo^a | Uchimoto, Tetsuya^b | Takagi, Toshiyuki^b

Affiliations: [a] International Institute of Universality, SB Bldg. 8F, 1-4-6 Nezu, Bunkyo-ku, Tokyo 113-0031, Japan | [b] Institute of Fluid Science, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan

Correspondence: [*] Corresponding author. Tel.: +81 3 5814 5350; Fax: +81 3 3827 0682; E-mail: mihai-r@iiu.co.jp

Abstract: This paper proposes an algorithm for multiple cracks reconstruction from ECT signals by means of a simulated annealing parallelized on a supercomputer. The algorithm takes not only the profiles of cracks but also the number of cracks as unknown, which is a very important feature from the practical point of view. A fast forward code using a database is upgraded for the rapid computation of the ECT signals of a differential mutual induction probe due to multiple cracks. The algorithm is applied to the reconstruction of the multiple cracks of a JSAEM round-robin test geometry. The reconstruction result using a simulated signal proves the validity of the proposed approach.

Keywords: eddy current testing, reconstruction, simulated annealing, multiple cracks, parallel computing

DOI: 10.3233/JAE-2004-598

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 399-404, 2004