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Dual EMAT and PEC non-contact probe: applications to defect testing

Edwards, R.S. and Sophian, Ali and Dixon, S. and Tian, G.-Y. and Jian, X. (2006) Dual EMAT and PEC non-contact probe: applications to defect testing. NDT & E International , 39 (1). 45 - 52. ISSN 0963-8695

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Abstract

For many non-destructive testing (NDT) applications, more information and greater reliability can be gained by using different techniques for defect detection, especially when the methods are particularly sensitive to different types of defects. However, this will often lead to a much longer and more expensive test and is not always practical due to time and cost constraints. We have previously discussed initial experiments using a new dual-probe combining electromagnetic acoustic transducers (EMATs) generating and detecting ultrasonic surface waves, and a pulsed eddy current (PEC) sensor 1. This enables more reliable detection and sizing of surface and near-surface defects, with a reduced testing time compared to using two \{NDT\} techniques separately. In this paper, we present experiments using the dual-probe on samples which are more representative of real defects, for example testing for surface defects in rails. Several aluminium calibration samples containing closely spaced and angled slots have been measured, in addition to rail samples containing manufactured and real defects. The benefits of using the dual-probe are discussed.

Item Type: Article (Journal)
Additional Information: 7258/46714
Uncontrolled Keywords: Sensor fusion
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA165 Engineering instruments, meters, etc. Industrial instrumentation
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Mechatronics Engineering
Depositing User: Dr Ali Sophian
Date Deposited: 14 Jan 2016 15:59
Last Modified: 21 Jul 2016 07:53
URI: http://irep.iium.edu.my/id/eprint/46714

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