Signal simulator for the calibration of eddy current probes

Author

Derun, E.N. ; Kolyshkin, A.A. ; Vaillancourt, Rémi

Author_Institution

Dept. of Autom. Control Syst., Riga Tech. Univ., Latvia

Volume

30

Issue

1

fYear

1994

fDate

1/1/1994 12:00:00 AM

Firstpage

92

Lastpage

97

Abstract

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

Keywords

calibration; eddy current testing; electric impedance; flaw detection; probes; quality control; signal processing equipment; welding; current frequency; eddy current probe calibration; electrically conducting plane; excitation coil; flaw detection; impedance change; mathematical model; numerical computation; signal emulation; signal simulator; spot weld quality testing; Calibration; Coils; Computational modeling; Eddy currents; Impedance; Mathematical model; Probes; Signal design; Spot welding; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.272520

Filename

272520