ULTRASONIC FLOWMETER - PANASONIC IP MAN CO LTD

Title:

ULTRASONIC FLOWMETER

Document Type and Number:

WIPO Patent Application WO/2020/044887

Kind Code:

A1

Abstract:

An ultrasonic flowmeter comprises a measurement flow path (1) and a pair of ultrasonic sensors (2a, 2b) disposed upstream and downstream on a first surface of the measurement flow path (1). The ultrasonic flowmeter also comprises a flow rate calculation unit for detecting the flow rate of a fluid under measurement on the basis of a propagation time until an ultrasonic signal transmitted from one ultrasonic sensor from among the pair of ultrasonic sensors (2a, 2b) is received by the other ultrasonic sensor from among the pair of ultrasonic sensors (2a, 2b) after propagating while reflecting one or more times from a second surface of the measurement flow path (1) opposing the first surface. Further, the inner wall surface of the measurement flow path (1) is provided with a die draft for integrated molding, and the pair of ultrasonic sensors (2a, 2b) are fixed to the measurement flow path (1) such that on a reflection surface (12) of the second surface that the ultrasonic signals of the ultrasonic sensors (2a, 2b) are reflected from, the angles of incidence of the ultrasonic signals are equal.

Inventors:

TAKAHASHI YUKIHIDE
NAKAI HIROSHI
YASUDA KENJI
KAYABA TAKASHI
ANAN YUKI

Application Number:

PCT/JP2019/029127

Publication Date:

March 05, 2020

Filing Date:

July 25, 2019

Export Citation:

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Assignee:

PANASONIC IP MAN CO LTD (JP)

International Classes:

G01F1/66

Foreign References:

JP2011112377A	2011-06-09
JP2011112378A	2011-06-09
JP2014215061A	2014-11-17
JP2004316685A	2004-11-11
JPH07311062A	1995-11-28
JP2014215060A	2014-11-17

Other References: