Non-Destructive Evaluation of Small Defects Using an Eddy Current Microcoil Sensor Array

Authors: Ravat, C.; Joubert, P.Y.; Le Bihan, Y.; Marchand, C.; Woytasik, M.; Dufour-Gergam, E.

Source: Sensor Letters, Volume 7, Number 3, June 2009 , pp. 400-405(6)

Publisher: American Scientific Publishers

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Abstract:

EC sensors are widely used for non-destructive defect detection and characterization. Microsensor arrays permit to increase the rapidity and the reliability of the detection as well as to get richer data, in order to facilitate the defect characterization. In this paper, a multicoil sensor array is used in a predefined transmission-reception scheme and the EC signals are parametrized in the complex plan. Then parameters are selected and processed in order to estimate the dimensions of each defect. The mean quadratic error is inferior to 70 μm in length and 30 μm in depth for surface breaking submillimetric defects.

Keywords: MULTICOIL; ARRAY SENSOR; EDDY CURRENT; NON DESTRUCTIVE EVALUATION; PARAMETRIZATION

Document Type: Research article

DOI: http://dx.doi.org/10.1166/sl.2009.1061

Publication date: 2009-06-01

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  • The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
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