Leak inspection device, leak inspection method, and leak inspection program

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9970840
SERIAL NO

14430258

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Abstract

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Each functional configuring unit of a leak inspection device (2000) operates in the manner that follows. A vibration acquisition unit (2020) acquires a signal indicating tubing vibrations or vibrations propagated from tubing. A filtering unit (2040) extracts a signal of a predetermined frequency band from the signal acquired by the vibration acquisition unit (2020). A characteristic value extraction unit (2060) splits the signal extracted by the filtering unit (2040) into predetermined time intervals, calculates for each split signal the absolute value of each extreme value of the magnitude of the signal, performs for each split signal a statistical process with respect to the calculated plurality of absolute values, and considers values calculated by the statistical process to be characteristic values. A leak determination unit (2080) considers inspection results to indicate the presence of a leak when a determination index value stipulated using the characteristic values is greater than a predetermined threshold.

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Patent Owner(s)

Patent OwnerAddress
NEC CORPORATIONMINATO-KU TOKYO 108-8001

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mataga, Junichiro Tokyo, JP 12 15
Sasaki, Yasuhiro Tokyo, JP 122 955
Shinoda, Shigeki Tokyo, JP 22 26
Takahashi, Masatake Tokyo, JP 37 101
Takata, Soichiro Tokyo, JP 12 5

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