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Patent Searching and Data


Title:
LEAKAGE INSPECTION DEVICE, LEAKAGE INSPECTION METHOD, AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2019/240231
Kind Code:
A1
Abstract:
The present invention more efficiently discriminates between the presence and absence of leakage. An oscillation measurement unit (32) measures an oscillatory waveform for a measurement time using a measurement time determination unit (31) and at least two sensors provided to piping, a cross-correlation function calculation unit (33) calculates a cross-correlation function of the measured oscillatory waveform, a peak detection unit (34) detects a peak of the cross-correlation function two or more times in the measurement time, and a leakage discrimination unit (35) discriminates that leakage is present when a peak is repeatedly detected for the measurement time.

Inventors:
SHINODA SHIGEKI (JP)
INOUE HIROFUMI (JP)
MATAGA JUNICHIRO (JP)
KUMURA TAKAHIRO (JP)
KIKUCHI KATSUMI (JP)
Application Number:
PCT/JP2019/023546
Publication Date:
December 19, 2019
Filing Date:
June 13, 2019
Export Citation:
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Assignee:
NEC CORP (JP)
International Classes:
G01M3/24; F17D5/06
Domestic Patent References:
WO2015146082A12015-10-01
WO2017094846A12017-06-08
WO2014050923A12014-04-03
Foreign References:
JP2016024023A2016-02-08
JP2018044799A2018-03-22
US20080314122A12008-12-25
KR20130064403A2013-06-18
JPH11201858A1999-07-30
JP2018114246A2018-07-26
Other References:
See also references of EP 3809107A4
Attorney, Agent or Firm:
SHIMOSAKA Naoki (JP)
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