Signal simulator for the calibration of eddy current probes

Journal Article · Sat Jan 01 04:00:00 EST 1994 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/20.272520· OSTI ID:7113769

Derun, E N; Kolyshkin, A A ^[1]; Vaillancourt, R ^[2]

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1. Riga Technical Univ., Riga (Latvia)
2. Univ. of Ottawa, Ontario (Canada). Dept. of Mathematics and Computer Science

This paper describes a signal simulator which is designed to calibrate eddy current probes. By using simultaneously an excitation coil and an electrically conducting plane, the simulator can emulate signals which correspond to spot welds with different flaws. The presence of a conducting plane allows a wide variation of the amplitude and phase of the excitation coil voltage during the calibration of a probe. A mathematical model for the simulator is derived and used to study the variation of the impedance change upon the parameters of the probe. Numerical computation shows that the impedance change depends in an important way on the frequency of the excitation coil current.

• OSTI ID: 7113769
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Vol. 30:1; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420500* -- Engineering-- Materials Testing
CALIBRATION
EDDY CURRENT TESTING
ELECTROMAGNETIC TESTING
EXCITATION SYSTEMS
JOINTS
MATERIALS TESTING
NONDESTRUCTIVE TESTING
PERFORMANCE
PROBES
TESTING
WELDED JOINTS