Title:
ACTIVE DETECTION METHOD AND SYSTEM FOR SEALING PERFORMANCE OF DOOR AND LEAKAGE POINT POSITION THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/159997
Kind Code:
A1
Abstract:
Disclosed in the present invention are an active detection method and system for a leakage point position. The active detection method comprises: step S1, acquiring a reference sound pressure set threshold value; step S2, sending a pulse-type ultrasonic signal by means of a pulse ultrasonic generator placed on one side of a protective door, respectively collecting original signals of four channels at different detection distances using an array detector, extracting sound pressure feature values of the four channels after processing, and acquiring a video image and a test distance; step S3, setting different leakage level threshold values on the basis of the extracted sound pressure feature values of the four channels and the reference sound pressure set threshold value; and step S4, measuring a sound pressure value on the other side of the protective door using the array detector, when the measured sound pressure value exceeds a first-level leakage threshold value, performing envelope cross-correlation operation based on adaptive filtering on the original signals of the four channels, so as to obtain three delay differences between three channels and the other channel, and combining the test distance, a sound pressure amplitude ratio and the measured sound pressure values of the four channels, performing fusion calculation to obtain three-dimensional spatial coordinates of a leakage point.
Inventors:
LU YIDONG (CN)
PENG FEI (CN)
ZHANG RUILONG (CN)
WANG JIANKUN (CN)
XING SHANPENG (CN)
JIANG YI (CN)
WANG JIA (CN)
PAN LONGBANG (CN)
PENG FEI (CN)
ZHANG RUILONG (CN)
WANG JIANKUN (CN)
XING SHANPENG (CN)
JIANG YI (CN)
WANG JIA (CN)
PAN LONGBANG (CN)
Application Number:
PCT/CN2022/128874
Publication Date:
August 31, 2023
Filing Date:
November 01, 2022
Export Citation:
Assignee:
CHINA INSTITUTE OF BUILDING STANDARD DESIGN & RES (CN)
BEIJING GUOJIANBIAO ENGINEERING EQUIPMENT TECH CO LTD (CN)
BEIJING GUOJIANBIAO ENGINEERING EQUIPMENT TECH CO LTD (CN)
International Classes:
G01M3/24
Foreign References:
| CN114563141A | 2022-05-31 | |||
| CN216770938U | 2022-06-17 | |||
| CN108444653A | 2018-08-24 | |||
| CN107328528A | 2017-11-07 | |||
| US4901576A | 1990-02-20 |
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
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