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Title:
FLOW RATE MEASUREMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/079568
Kind Code:
A1
Abstract:
Disclosed is a flow rate measurement device, comprising a time differential memory unit (17b), which stores a time differential of a propagation time of an ultrasonic signal in a forward and a reverse direction that is measured in a unit measurement process, while switching a transmission and reception direction in a forward and a reverse direction of two oscillation elements (2, 3) when carrying out each respective K iterations of the unit measurement process that measures the propagation time in the forward and the reverse direction thereof, a flow rate computation unit (15), which derives a pass-through flow rate of a liquid body, based on a sum of the propagation time in the forward and the reverse direction of the unit measurement process that is carried out not less than K iterations thereof, and an estimation unit (18), which estimates an instantaneous change in the flow rate of the liquid body based on the time differential for each of the K iterations of the unit measurement process that is stored upon the time differential memory unit (17b), thereby facilitating a detection of the instantaneous change of the flow rate while deriving an accurate pass-through flow rate.

Inventors:
TAKEMURA, Koichi (())
竹村晃一 (())
SHIBA, Fumikazu (())
Application Number:
JP2009/007231
Publication Date:
July 15, 2010
Filing Date:
December 25, 2009
Export Citation:
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Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真1006番地 Osaka, 〒5718501, JP)
TAKEMURA, Koichi (())
竹村晃一 (())
International Classes:
G01F1/66; G01F3/22
Attorney, Agent or Firm:
NAITO, Hiroki et al. (1006 Oaza Kadoma, Kadoma-sh, Osaka 01, 〒5718501, JP)
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