GAS BLOCK DEVICE

WIPO Patent Application WO/2010/079758

A1

An abnormal flow rate is determined accurately by calculating a correction flow rate from which the pulsation component is removed.  A gas block device includes a flow rate detection section (21), a flow rate calculation section (22), an abnormal flow rate determination section (23), a valve drive section (24), a valve (25), a pulsation correction section (26), a pulsation holding section (27), and an external input section (28), wherein the pulsation correction section (26) extracts a pulsation pattern (F) from the flow rate (B) of the flow rate calculation section (22), and calculates a correction flow rate (E) from which the pulsation component is cancelled by adding a value which has the phase opposite to that of the pulsation pattern (F) to the flow rate (B).  Consequently, a gas block device can make a comparison with an abnormality determination flow rate at the abnormal flow rate determination section (23).

OOTANI TAKUHISA
KOBA YASUO
NAKAMURA HIROZUMI
FUJII YUJI
IWAMOTO RYUJI
YOKOHATA MITSUO
SHIGEOKA TAKEHIKO
ASANO KAZUTAKA
UEKI KOUICHI
MIYATA HAJIME
ITOU YOUICHI

PCT/JP2010/000073

July 15, 2010

January 07, 2010

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PANASONIC CORP (JP)
OOTANI TAKUHISA
KOBA YASUO
NAKAMURA HIROZUMI
FUJII YUJI
IWAMOTO RYUJI
YOKOHATA MITSUO
SHIGEOKA TAKEHIKO
ASANO KAZUTAKA
UEKI KOUICHI
MIYATA HAJIME
ITOU YOUICHI

G01F3/22; G01F1/72

JP2001296162A	2001-10-26
JPH06229799A	1994-08-19
JP2000298042A	2000-10-24

OGURI, Shohei et al. (JP)
Shohei Oguri (JP)

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