A MEASUREMENT SYSTEM FOR INDUCTANCE TOMOGRAPHY ON CONDUCTIVE MATERIALS
Andrea Bernieri, Luigi Ferrigno, Marco Laracca, Antonello Tamburrino
Abstract:
The paper describes the realization of a measurement system for executing Eddy Current Non Destructive Testing (EC-NDT) to detect defects on conductive materials. The measurement method is based on the adoption of a useful parameter, the mutual impedance matrix, obtained using a suitable probe and analyzed by means of a novel low cost non-iterative inversion algorithm. In particular, the probe is constituted by a set of coils arranged in a two-dimensional array: during a measurement session, the mutual impedance matrix is obtained exciting one coil at time and capturing the voltage at the terminals of the other coils on the probe, at different excitation current frequencies. In the paper, the probe design, the inversion algorithm, the architecture of a useful measurement station, and the preliminary results obtained carrying out measurement sessions on a specimen with known defects, are reported.
Keywords:
non-destructive testing, eddy current testing, multi-sensor probe, digital signal processing, automatic measurement systems, inverse problems
Download:
PWC-2003-TC4-020.pdf
DOI:
-
Event details
Event name:
XVII IMEKO World Congress
Title:

Metrology in the 3rd Millennium

Place:
Dubrovnik, CROATIA
Time:
22 June 2003 - 28 June 2003
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