LEAK-DETECTING DEVICE, LEAK DETECTION METHOD, AND PROGRAM-CONTAINING RECORDING MEDIUM

摘要

In this invention, leaks in pipes can be detected with a high degree of precision, even in noisy environments. This leak-detecting device comprises the following: a leak-presence determination unit that uses signals representing detection results from a plurality of sensors to compute the value of a cross-correlation function for said signals, and if the computed value is greater than or equal to a first threshold and the change over time exhibited by a value computed from measurements at a different point in time is less than or equal to a second threshold, determines that a leak is present; and a leak-location computation unit that computes leak-sound propagation-time differences on the basis of areas for which the value of the aforementioned cross-correlation function is greater than or equal to the aforementioned first threshold and the change over time exhibited by the value of said cross-correlation function from measurements at a different point in time is less than or equal to the aforementioned second threshold and identifies the location of the leak on the basis of said propagation-time differences.