Title:
WATER LEAKAGE DETECTION METHOD, WATER LEAKAGE DETECTION SYSTEM, AND SENSOR TERMINAL USED IN SAME
Document Type and Number:
WIPO Patent Application WO/2020/095538
Kind Code:
A1
Abstract:
The objective of this invention is to provide a water leakage detection method, water leakage detection system, and sensor terminal used in the same that make it possible to highly reliably determine whether there is water leakage using a single sensor terminal without limitation from the wireless communication environment. To achieve this objective, in this invention, a plurality of extracted peak position information sets, which each comprise a plurality of autocorrelation coefficient peaks, are acquired through the repetition of a process in which measurement data is acquired from a vibration sensor, an autocorrelation coefficient is calculated from the measurement data, and a peak position information set is extracted. Whether there is water leakage is determined on the basis of the relationship between the plurality of peak position information sets.
Inventors:
KAMADA YUUDAI (JP)
MINE TOSHIYUKI (JP)
MINE TOSHIYUKI (JP)
Application Number:
PCT/JP2019/036004
Publication Date:
May 14, 2020
Filing Date:
September 13, 2019
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G01M3/24
Domestic Patent References:
| WO2017199455A1 | 2017-11-23 |
Foreign References:
| JP2003172666A | 2003-06-20 | |||
| KR20180110543A | 2018-10-10 | |||
| JPH10176970A | 1998-06-30 |
Attorney, Agent or Firm:
SEIRYO I.P.C. (JP)
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