Sizing of multiple cracks using magnetic flux leakage measurements

作     者：Ravan, M. Amineh, R. K. Koziel, S. Nikolova, N. K. Reilly, J. P. 

作者机构：McMaster Univ Dept Elect & Comp Engn Hamilton ON Canada Reykjavik Univ Sch Sci & Engn Reykjavik Iceland 

出 版 物：《IET SCIENCE MEASUREMENT & TECHNOLOGY》 (IET Sci. Meas. Technol.)

年 卷 期：2010年第4卷第1期

页      面：1-11页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

主　　题：magnetic leakage magnetic flux leakage measurements space mapping crack parameter estimation edge detection Canny edge detection algorithm multiple crack sizing multiple narrow-opening cracks parameter estimation Fracture mechanics and hardness (mechanical engineering) Fracture mechanics, fatigue, and cracks cracks Numerical analysis finite element method magnetic flux crack depths finite element analysis Numerical approximation and analysis 

摘      要：This study presents an approach to estimate the characteristics of multiple narrow-opening cracks from magnetic flux leakage (MFL) signals. The number, locations, orientations and lengths of the cracks are the objective of the inversion process. The proposed procedure provides a reliable estimation of crack parameters in two separate consecutive steps. In the first step, the Canny edge detection algorithm is used to estimate the number, locations, orientations and lengths of the cracks. Then, an inversion procedure based on space mapping is used in order to estimate the crack depths efficiently. The accuracy of the proposed algorithm is examined via simulations based on the finite element method as well as real experimental MFL data.