Fault point direction distinction device

摘要

PURPOSE:To easily detect the direction of a leak in a transport tube by providing two sets of vibration detectors which detect and convert the vibration of a tube wall into electric signals, fixing a weight halfway between them, and comparing the wave numbers of the AC signals of the two sets of the vibration detectors with each other. CONSTITUTION:Part of the transport tube, e.g. a water pipe 10 is digged out and the vibration detectors 1 and 2 are fixed on the water pipe 10. The weight 6 is fixed between the vibration detectors 1 and 2 by a fixing jig 7. Counters 3 and 4 amplify the output signals of the vibration detectors 1 and 2 with the start/stop command from a synchronizing device 5 and cut noises to count the numbers of AC waves. For example, if there is a leak of water at a point A, vibration is propagated as shown by an arrow and detected by the vibration detector 2 and the number C2 of waves counted by the counter 4 is detected by the vibration detector 1 and becomes larger than the number of waves C1 counted by the counter 3. If there is a leak of water at a point B, C1C2. Consequently, the direction of the fault point is easily detected.