Title:
LEAK-DETECTING DEVICE, LEAK DETECTION METHOD, AND PROGRAM-CONTAINING RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2015/146082
Kind Code:
A1
Abstract:
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.
Inventors:
ONO YUMI (JP)
HOSHUYAMA OSAMU (JP)
HOSHUYAMA OSAMU (JP)
Application Number:
PCT/JP2015/001519
Publication Date:
October 01, 2015
Filing Date:
March 18, 2015
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01M3/24; F17D5/06
Foreign References:
| JPH10185744A | 1998-07-14 | |||
| JPH10281921A | 1998-10-23 | |||
| JP2000221098A | 2000-08-11 | |||
| JP2006003311A | 2006-01-05 | |||
| JPH1164152A | 1999-03-05 |
Attorney, Agent or Firm:
SHIMOSAKA, NAOKI (JP)
Naoki Shimosaka (JP)
Naoki Shimosaka (JP)
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