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Physical amount change history recording method, its program, flow rate measuring device, and fluid supply system

A flow measurement device and physical quantity technology, applied in the direction of measuring flow/mass flow, measuring device, liquid/fluid solid measurement, etc., to achieve the effects of reducing storage capacity, improving calculation speed and recognition accuracy, and simplifying calculations

Active Publication Date: 2010-06-30
PANASONIC CORP
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  • Description
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Problems solved by technology

[0003] In the above-mentioned gas meter 1, the change in the differential value between the instantaneous flow output from the flow measurement unit 3 is continuously calculated, and the change in the operating state of the gas appliance is recognized based on the change amount; registered data and measurement The gas flow changes (difference values) are compared with each other, and identification of the working gas appliances 13, 14, and 15 becomes possible

Method used

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  • Physical amount change history recording method, its program, flow rate measuring device, and fluid supply system
  • Physical amount change history recording method, its program, flow rate measuring device, and fluid supply system
  • Physical amount change history recording method, its program, flow rate measuring device, and fluid supply system

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Embodiment Construction

[0040] Embodiments of the present invention will be described with reference to the drawings.

[0041] figure 1 It is a block diagram of a gas meter as a flow measuring device (physical quantity measuring device) in an embodiment of the present invention.

[0042] figure 1 Among them, the gas meter 100 includes: a flow path 102, an ultrasonic flowmeter 104 as a flow measurement unit, a measured flow information storage unit 106, a calculation unit 108, a flow classification table storage unit 110, a differential value conversion unit 112, and a flow change history generation unit. 114 , an appliance identification unit 116 , and an appliance-specific flow history information storage unit 118 . The gas meter 110 further includes a flow path shutoff valve 122 on the flow path 102 for shutting off gas in an emergency or the like.

[0043] The ultrasonic flowmeter 104 emits ultrasonic waves at given time intervals (for example, two seconds, etc.) to gas as a fluid flowing in ...

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Abstract

When providing an instrument identification technique, it is possible to improve the calculation speed and the identification accuracy while reducing a necessary memory amount. A gas meter (100) includes an ultrasonic flowmeter (104) which measures a flow rate of a gas flowing in a flow channel (102) at a predetermined time interval and a calculation unit (108) which calculates a difference value between flow rates measured by the calculation unit (108) at a predetermined time interval. According to a flow rate division table (110a) containing a plurality of difference value divisions based on the difference values which are correlated to codes indicating the respective divisions, a difference value conversion unit (112) converts the calculated difference value into a code. Furthermore, according to a set of codes obtained at a predetermined time interval, a flow rate change history generation unit (114) generates a flow rate change history as a dummy expression of a gas flow rate change.

Description

technical field [0001] The present invention relates to a technique for correctly identifying phenomena by capturing changes in physical quantities such as fluid flow rates. Background technique [0002] For example, a gas meter has hitherto been available as a device for capturing changes in physical quantities and identifying phenomena. Patent Document 1 describes a gas meter for identifying work implements in a fluid piping system having a gas meter. The gas meter 1 in the document has: a flow measurement unit 3, which is placed in a flow path 6 connected to a domestic gas supply pipe, for measuring the gas flow at given time intervals; a calculation unit 4, which uses and a comparison and determination unit 7 for making a difference between the difference value calculated by the calculation unit 4 and the change determination value registered in the storage unit 5 Compare, and determine the change in the working status of each gas appliance, such as Figure 7 shown. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F3/22G01F15/06
CPCY04S20/32G01D4/002G01F1/66G01F15/002G01F15/068Y04S20/38Y02B90/241G01D2204/24Y04S20/30Y02B90/20
Inventor 岩本龙志
Owner PANASONIC CORP
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