+ Extremely at manner of pipe arrangement damage detection and device null abbreviation regular interval

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for detecting piping damage capable of detecting the presence or absence of the piping damage by passing an insertion member through piping to be inspected and checking whether a light emitting diode lights up or not. ;SOLUTION: A piping damage detecting device is provided with a detection circuit comprising a flexible printed circuit board 1 on which circuits conducted generally at equal intervals with a positive pole and a control input pin side are printed alternately, a battery and a light emitting diode connected to the circuits of the printed circuit board 1, and a self-holding circuit which is connected to the battery and light emitting diode and conducts the circuits when the positive side and control input in pin side of the printed circuit board are temporarily short-circuited to each other and an inserting member 5 which is formed of an elastic material and of which top end part is formed in a conical shape and of which rear half part is formed in a cylindrical shape. the detection circuit is stuck on the flexible printed circuit board so that it covers at least the conical top end part of the inserting member 5, and installed to the cylindrical inserting part.;COPYRIGHT: (C)1999,JPO