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Title:
FLOW RATE MEASUREMENT DEVICE
Document Type and Number:
Japanese Patent JP2013221853
Kind Code:
A
Abstract:

To provide a flow rate measurement device capable of discriminating a gas appliance whose flow rate increases to reach extinguishment.

In a flow rate measurement device 1 to which a plurality of appliances are connected, characteristics of instantaneous flow rate change of a flow rate are grasped to certainly discriminate a gas appliance whose flow rate increases to reach extinguishment by including: a flow rate measurement part 2; and a time measurement part 3, calculating flow rate difference (m=ΔQ/Δt) per unit time of the flow rate obtained by the flow rate measurement part 2 for timing of the time measurement part 3, a fact that sign inversion of the flow rate difference is confirmed, and discriminating whether or not a difference gradient (θ=Δm/Δt) at that time is within a predetermined range.


Inventors:
YOKOHATA MITSUO
NAWA MOTOYUKI
Application Number:
JP2012093625A
Publication Date:
October 28, 2013
Filing Date:
April 17, 2012
Export Citation:
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Assignee:
PANASONIC CORP
International Classes:
G01F3/22
Domestic Patent References:
JPH07151578A1995-06-16
JP2006200802A2006-08-03
JP2009109054A2009-05-21
JP2011191122A2011-09-29
JP2006313114A2006-11-16
JP2009244208A2009-10-22
JP2008196991A2008-08-28
JP2003194331A2003-07-09
Foreign References:
WO2010100886A12010-09-10
Attorney, Agent or Firm:
Hiroki Naito
Daisuke Nagano
Kentaro Fujii



 
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