M. Taniguchi et al., HOLOGRAPHIC PATTERN MEASUREMENT OF PRINTED-CIRCUIT BOARD (PCB) VIBRATION DUE TO MOUNTED ELECTROMAGNETIC RELAY OPERATION, IEICE transactions on fundamentals of electronics, communications and computer science, E76A(7), 1993, pp. 1170-1173
The authors developed new measuring system (Holographic Pattern Measur
ing System [HPMS]), which is composed of both techniques of holography
and graphic image processing, was used to measure the vibrations of a
printed circuit board (PCB) due to operation of a mounted electromagn
etic relay on it. The clear vibration patterns were obtained. By using
pattern analysis processor, quantitative vibration patterns of the PC
B surface were observed. Both the vibration patterns and displacements
were changed by edge fixing way of the PCB.