Parameter optimisation of the pulsed eddy current probe for the detection of defects around the rivet in multi-layer structures
In this paper, a pulsed eddy current testing (PECT) probe is introduced for the detection of defects around the rivet in multi-layer structures. The principle of this probe is analysed and a numerical simulation model of the PECT probe based on the finite element method (FEM) is built. The detection of defects in metallic multi-layer structures using the probe is verified through simulations. The size and position of defects can be evaluated using the time for the peak value of the differential magnetic flux density, respectively. The sensitivity of the probe is analysed and the parameters of the probe are optimised on the basis of the orthogonal test method. Finally, a group of optimal parameters and the influence ranks of the parameters to the probe sensitivity are obtained, in which the influence ranks of the parameters to the probe sensitivity are such that ds > l1 > d1 > h1. The results of the optimisation are verified and show that the sensitivity has increased greatly.
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Document Type: Research Article
Publication date: September 1, 2018
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- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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