LEAK DETECTION METHOD, WATER LEAKAGE DETECTION METHOD, LEAK DETECTION DEVICE, AND WATER LEAKAGE DETECTION DEVICE

摘要

The present invention provides a leakage detection method, a water-leakage detection method, a leakage detection device, and a water-leakage detection device, for a pipe, with ease of placing sensors, high detection accuracy, and high reliability. The leakage detection method includes: an acoustic data acquisition step of performing time synchronization between acoustic sensors configuring the pair of acoustic sensors to acquire acoustic data by the acoustic sensors; a time difference calculation step of determining a difference between arrival times of sounds received by the respective acoustic sensors; a distance difference calculation step of calculating, from the difference between arrival times, a difference between distances from a source of the sounds to the respective acoustic sensors; a hyperbola acquisition step of determining a hyperbola which is a collection of points at each of which a difference in distance from each of the acoustic sensors is constant, with positions of the respective acoustic sensors as foci; and a position identification step of identifying a position of the leakage from an intersection between the pipe and the hyperbola.