端末ソケット部におけるワイヤロープの探傷法について

抄録

Wire ropes are commonly terminated by a socket with alloy filling, and the inspection of broken wire inside the socket is virtually impossible. This paper describes an electromagnetic inspection method of wire rope terminals on the premise that the socket is of non-magnetic metal. A pair of magnetogalvanic sensors travel along one of the measuring tracks which have been laid out on surface of the socket, while the terminal part of the rope is longitudinally magnetized. The output trace of the sensor normally meanders due to the interior distribution of disassembled component wires, but a broken wire induces a distinct local change of the leakage magnetic flux at the nearby sensor track, which is recognizable when the trace is compared with the precedent one obtained on the same track.