公开(公告)号：EP2249132A4

公开(公告)日：2012-01-04

申请号：EP09718159

申请日：2009-03-02

Applicant: PANASONIC CORP

Inventor： MIYATA HAJIME ,  KAMON KENICHI ,  ITOU YOUICHI ,  BESSYO DAISUKE ,  IWAMOTO RYUJI

IPC: G01F3/22 ,  F17D5/06 ,  F23K5/00 ,  F23N5/18 ,  F23N5/24 ,  G01F15/06

CPC classification number: F17D5/06 ,  F23N5/18 ,  F23N5/24 ,  F23N2025/04 ,  G01F7/005 ,  G01F15/068

Abstract: Detecting a leak, or the like, with high accuracy on the basis of pressure and a flow volume acquired during use of fluid is made possible. A volume of gas flowing through a flow path 102 is measured by a flow volume measurement unit 106, and pressure is measured by a pressure measurement unit 108. Measured flow data and measured pressure data are input to an analysis unit 112, to thus analyze following of a pressure change by a flow volume change. An amount of flow volume change responsive to an amount of pressure change of a predetermined level or more is classified into a plurality of ranges by means of a predetermined threshold value, and a following flow value change is determined on the basis of determination conditions of the respective ranges of amounts of flow volume changes.

公开(公告)号：EP2333415A4

公开(公告)日：2012-05-30

申请号：EP09818996

申请日：2009-10-08

Applicant: PANASONIC CORP

Inventor： UEKI KOUICHI ,  OOTANI TAKUHISA ,  IWAMOTO RYUJI ,  ASANO KAZUTAKA

IPC: F23N5/18 ,  F23N1/00 ,  F23N5/20 ,  F23N5/24 ,  G01F1/66 ,  G01F1/68 ,  G01F3/22 ,  G01F15/00

CPC classification number: F23N5/184 ,  F23N1/002 ,  F23N5/203 ,  F23N5/242 ,  F23N2031/18 ,  F23N2035/24 ,  F23N2037/02 ,  G01F1/66 ,  G01F1/68 ,  G01F3/22 ,  G01F15/002 ,  Y10T137/8158

公开(公告)号：EP2333414A4

公开(公告)日：2014-11-05

申请号：EP09818995

申请日：2009-10-08

Applicant: PANASONIC CORP

Inventor： OOTANI TAKUHISA ,  UEKI KOUICHI ,  IWAMOTO RYUJI ,  ASANO KAZUTAKA

IPC: F23K5/00 ,  F23N5/18 ,  F23N5/24 ,  G01F3/22

CPC classification number: F23N1/002 ,  F23N5/184 ,  F23N5/203 ,  F23N5/242 ,  F23N2031/18 ,  F23N2035/24 ,  G01F15/002 ,  Y10T137/7759

Abstract: An object of the invention is to avoid a gap between the total using amount of gas and the sum of a plurality of change amounts held in a gas cutoff device. The gas cutoff device includes a flow rate detection unit 11, a flow rate calculation unit 12, an increase and decrease calculation unit 13, an increase and decrease determination unit 14, a valve driving unit 15, a valve 16, an increase and decrease correction unit 17, and a constant increase and decrease correction unit 18. The increase and decrease determination unit 14 acquires a corrected change amount 'G' from the increase and decrease unit 17 or the constant increase and decrease correction unit 18 and adopts the amount as a new change amount 'C'. In this way, it is possible to prevent the using time of gas until the gas path is closed from being lengthened.

公开(公告)号：EP2405242A4

公开(公告)日：2013-07-31

申请号：EP10748485

申请日：2010-03-01

Applicant: PANASONIC CORP

Inventor： YOKOHATA MITSUO ,  IWAMOTO RYUJI ,  OOTANI TAKUHISA ,  UEKI KOUICHI ,  ASANO KAZUTAKA ,  MIYATA HAJIME ,  ITOU YOUICHI

IPC: G01F3/22 ,  G01F1/66

CPC classification number: G01F1/66 ,  F23N2025/06

Abstract: The present invention provides a flow rate measuring device capable of simplifying calculation, reducing the amount of a memory required for the calculation, absorbing variations due to manual operation and depending on the state of ignition, and improving the accuracy of appliance identification by using a configuration in which the features of appliances are extracted. The flow rate measuring device is formed of a difference value conversion unit 112 for converting the difference values of the flow rate measured at constant time intervals by an ultrasonic flowmeter 104; an appliance feature extraction unit 214 for creating an appliance feature code string indicating the feature of each appliance by making comparison and judgment using the third last code, the second last code, the last code and the current code of the codes obtained at constant time intervals and by performing code deletion, etc.; and an identification unit 116 for performing appliance identification by comparing the appliance feature code string with an appliance inherent feature code string indicating the feature code string inherent in each appliance.

公开(公告)号：EP2434219A4

公开(公告)日：2014-08-20

申请号：EP10777575

申请日：2010-05-19

Applicant: PANASONIC CORP

Inventor： OOTANI TAKUHISA ,  IWAMOTO RYUJI ,  YOKOHATA MITSUO ,  UEKI KOUICHI ,  ASANO KAZUTAKA ,  MIYATA HAJIME ,  ITOU YOUICHI

IPC: F23N5/24 ,  F23K5/00 ,  G01F3/22

CPC classification number: F23N5/242 ,  F23K5/005 ,  G01F1/00

公开(公告)号：EP2161550A4

公开(公告)日：2012-07-25

申请号：EP08764102

申请日：2008-06-12

Applicant: PANASONIC CORP

Inventor： IWAMOTO RYUJI

IPC: G01F15/06 ,  G01F1/66

CPC classification number: G01F15/005 ,  G01F15/063 ,  G01F15/0755

Abstract: On occasion of provision of a technique for identifying an appliance, an attempt can be made to enhance computing speed and the accuracy of identification of an appliance while the amount of memory required for an apparatus is reduced. In a gas meter 100, an ultrasonic flowmeter 104 measures the quantity of a gas flowing through a flow path 102 at a given time interval, and a computation section 108 computes a difference value of the measured flow at each given time. A difference value conversion section 112 converts a computed difference value into a code with reference to a flow rate class table 110a by which a plurality of difference value classes corresponding to a size of the difference value and codes representing the respective classes are associated with each other. A code sequence generation section 114 further generates a measurement code sequence from an aggregation of codes at each given time, and an appliance identification section 116 compares the measurement code sequence with an appliance characteristic code sequence showing a characteristic code sequence of each gas appliance, thereby identifying a gas appliance that uses a gas.