ULTRASONIC FLOWMETER, ULTRASONIC TRANSDUCER, ULTRASONIC TRANSMITTING/RECEIVING UNIT, AND FLOWRATE MEASURING METHOD USING ULTRASONIC FLOWMETER

WIPO Patent Application WO/2005/064289

A1

[PROBLEMS] Using an ultrasonic flowmeter, measurement accuracy is improved by enhancing the sensitivity of receiving a reflected wave. [MEANS FOR SOLVING PROBLEMS] An ultrasonic flowmeter for measuring the flowrate of a fluid to be measured comprises an ultrasonic transmitting means for emitting ultrasonic pulses at desired frequency along a measurement line from an ultrasonic transducer into a fluid to be measured in a fluid pipe, a flow-velocity distribution measuring means for receiving an ultrasonic echo reflected from the measurement region among the ultrasonic pulses emitted into the fluid and measuring the flow-velocity distribution of the fluid in the measurement region, a flowrate calculation means for calculating the flowrate of the fluid in the measurement region from the flow-velocity distribution of the fluid. The substantial area of the receiver of the ultrasonic transducer is greater than that of the emission. An emission portion can be switched to be a whole receiver.

JPS55162009	ULTRASONIC FLOWMETER
WO/2018/117008	ULTRASONIC MEASURING DEVICE
JP2002365100	FLOW MEASURING DEVICE

MORI MICHITSUGU (JP)
TEZUKA KENICHI (JP)
TEZUKA HIDEAKI (JP)

PCT/JP2004/019434

July 14, 2005

December 24, 2004

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TOKYO ELECTRIC POWER CO (JP)
MORI MICHITSUGU (JP)
TEZUKA KENICHI (JP)
TEZUKA HIDEAKI (JP)

G01F1/66; (IPC1-7): G01F1/66

JP2003130699A	2003-05-08
JP2002336248A	2002-11-26
JP2888191B2	1999-05-10

Mugishima, Takashi (3rd floor 1-5-4, Nihonbashi Kakigara-ch, Chuo-ku Tokyo 14, JP)

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