GAS SAFETY DEVICE - PANASONIC IP MAN CO LTD

Title:

GAS SAFETY DEVICE

Document Type and Number:

WIPO Patent Application WO/2019/188317

Kind Code:

A1

Abstract:

The present invention is provided with: a flow channel (2) through which a gas flows; an ultrasonic sensor (1) for measuring the flow rate of the gas flowing through the flow channel (2); a computation unit (15) that calculates flow rate measurement data from measured values of the ultrasonic sensor (1); and a leak detection unit (14) that detects very small gas leaks. The present invention is also provided with: a pulsation recognition unit (5) that, when a change in the flow rate measurement data calculated by the flow rate computation unit (15) is at or above a prescribed value, recognizes that a pulsation is being generated; and a during-pulsation flow rate correction unit (6) that corrects the flow rate measurement data by using a prescribed value when it is determined by the pulsation recognition unit (5) that pulsation is occurring. Furthermore, when it is determined by the pulsation recognition unit (5) that pulsation is occurring, the leak detection unit (14) determines the presence or absence of a leak by using the flow rate measurement data corrected by the during-pulsation flow rate correction unit (6).

Inventors:

FUJII YUJI
KAYABA TAKASHI
UEDA YOSHIHIRO
YASUDA KENJI
GYOUTOKU TAITI
KINOSHITA HIDEKI

Application Number:

PCT/JP2019/010444

Publication Date:

October 03, 2019

Filing Date:

March 14, 2019

Export Citation:

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Assignee:

PANASONIC IP MAN CO LTD (JP)

International Classes:

G01F3/22; G01F1/00

Foreign References:

JP2010160040A	2010-07-22
JP2004125609A	2004-04-22
JP2003222548A	2003-08-08
JP2011007513A	2011-01-13
US6199573B1	2001-03-13
JP2001241985A	2001-09-07
JP2003315132A	2003-11-06

Other References: