1995 Volume 115 Issue 10 Pages 956-961
This paper proposes a three phase magnetic sensing system which makes it possible to detect the defect, bending and deflection of metallic plate. Operating principle of this system is based on the essential nature of three phase transformer circuit. When balanced three phase currents are fed into the primary coils which work as the sensing part, zero phase voltage is detected if the target, i. e. secondary circuits. has defects. Zero phase voltage is not detected if the target' has no defects. Experimental verification was carried out about the defect, bending and deflection of the metallic plates.
The transactions of the Institute of Electrical Engineers of Japan.A
The Journal of the Institute of Electrical Engineers of Japan