A method of determining the eddy current instrument response from models
The output of a model of an eddy current test is typically the impedance change of a coil or probe. An eddy current instrument takes this impedance change and, by means of the electronic circuits and instrument settings, modifies it to produce a screen display suitable for the operator. To predict the actual output of an eddy current test, it is important to know the effect the instrument has on the impedance change, as output by the model. By using the output of standard calibration situations, and using a mathematical transformation to estimate the instrument output equivalent to the impedance change produced in the models, the output of an instrument to a more general modelled situation can be estimated. This paper describes the method developed and presents some practical examples.
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Document Type: Research Article
Publication date: February 1, 2014
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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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