SYMPOSIA PAPER Published: 01 January 1981
STP27600S

Design of a Pulsed Eddy-Current Test Equipment with Digital Signal Analysis

Source

Test equipment was designed for investigations on the application of the pulsed eddy-current method on the detection of subsurface defects in thicker components or layers. The evaluation of the signals delivered by the coil system is performed in four single channels with different sampling delays or by plotting the signal time shape. The measured values are digitized and stored within the memory of a minicomputer for data processing. The coil systems are dimensioned in such a manner that the desired sensitivity was obtained for a defect depth range of about 10 mm in austenitic materials. The determination of the time of the signal zero crossing gives information concerning the defect distance from the surface.

Author Information

Wittig, G
Bundesanstalt für Materialprüfung, Berlin, Germany
Thomas, H-M
Bundesanstalt für Materialprüfung, Berlin, Germany
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E07
Pages: 387–397
DOI: 10.1520/STP27600S
ISBN-EB: 978-0-8031-4792-8
ISBN-13: 978-0-8031-0752-6