Method and device of identifying and locating PCCP broken wire signal

A device for identifying a prestressed concrete cylinder pipe broken wire signal, comprising:

• a distributed optical cable, which adheres to a pipe longitudinally;
• a high-frequency subsystem, which is connected to two cores of the distributed optical cable, the high-frequency subsystem is configured to collect a broken wire vibration high-frequency signal;
• a low-frequency subsystem, which is connected to a third core of the distributed optical cable, the low-frequency subsystem is configured to detect a broken wire vibration low-frequency signal;
• a control system which is connected to the high-frequency subsystem and the low-frequency subsystem, the control system is configured to analyze abnormal vibration on the broken wire vibration high-frequency signal and determine whether a broken wire event occurs,
• and, if the broken wire event is occurred, the control system is configured to determine a time period of an abnormal vibration signal occurrence corresponding to the broken wire event and then configured to determine the broken wire signal occurrence location based on a broken wire vibration low-frequency signal corresponding to the time period of the abnormal vibration signal occurrence;
• wherein the high-frequency subsystem and the low-frequency subsystem collect signal synchronously.