Title :
Nondestructive metal sheet testing using the phase angle of the electromagnetic fields
Author :
Girgis, G.A. ; Bastawros, Awad
Author_Institution :
Assiut University, Electrical Engineering Department, Assiut, Egypt
fDate :
5/1/1986 12:00:00 AM
Abstract :
An exciting cylindrical coil fed with AC current is placed in front of a metallic sheet under test. Variation of the coil impedance due to the presence of the sheet depends on the purity and thickness of the sheet. It is shown that the phase angle rather than the amplitude of the change of the coil impedance is a good measure for testing.
Keywords :
eddy current testing; electromagnetic fields; AC current; coil impedance; eddy current testing; electromagnetic fields; exciting cylindrical coil; metallic sheet; nondestructive testing; phase angle;
Journal_Title :
Physical Science, Measurement and Instrumentation, Management and Education - Reviews, IEE Proceedings A
DOI :
10.1049/ip-a-1.1986.0024
