Title :
Superposition of signal components during inspection of printed circuit boards by an eddy current testing probe with a solenoid pick-up coil
Author :
Kacprzak, D. ; Taniguchi, T. ; Nakamura, K. ; Yamada, S. ; Iwahara, M.
Author_Institution :
Fac. of Eng., Kanazawa Univ., Japan
fDate :
7/1/2001 12:00:00 AM
Abstract :
This paper presents a theory of the superposition of two signal components formed during the inspection of printed circuit board (PCB) by an eddy-current testing probe composed of a meander-exciting coil and a solenoid pick-up coil. Proportion of these two components effects the amplitude and the phase of the output signal. Characteristic changes of the phase characteristic, obtained from calculations and observed during the real inspection of PCB, are explained
Keywords :
eddy current testing; inspection; printed circuit testing; solenoids; eddy current testing probe; inspection; meander-exciting coil; printed circuit board; signal component superposition; solenoid pick-up coil; Circuit testing; Coils; Conductors; Eddy currents; Electrical capacitance tomography; Inspection; Printed circuits; Probes; Solenoids; Tellurium;
Journal_Title :
Magnetics, IEEE Transactions on
