ULTRASONIC CURRENT METER

WIPO Patent Application WO/2002/103299

A1

An ultrasonic current meter having a small size and a small power consumption. A burst signal generation block (110) generates two burst signals having a phase difference, which are transmitted to a pair of ultrasonic probes (6, 7) for transmission&sol reception. The pair of ultrasonic probes (6, 7) for transmission&sol reception receives the burst signal, converts the burst signal, and transmits ultrasonic waves having a phase difference into a fluid (9) to be measured. One of the ultrasonic probes receives an ultrasonic wave which has been transmitted from the other ultrasonic probe and has propagated through the fluid and converts the ultrasonic wave into a reception signal. This reception signal is binarized by binarization circuits (16, 17) and subjected to exclusive−OR in an exclusive−OR circuit (30) so as to obtain a phase difference signal expressing a phase difference. The fluid velocity is measured in accordance with this phase difference signal.

JP2003511144	Description: A method and an apparatus for improving the accuracy of measuring the velocity of a fluid.
WO/2017/046571	WIND SENSOR HOUSING AND WIND SENSOR COMPRISING SUCH A HOUSING
JPH10267717	FLOWMETER

KISHIMOTO MASAO (JP)
MOTEGI RYOHEI (JP)
SUZUKI YUKIHIKO (JP)
IWABUCHI HIROSHI (JP)

PCT/JP2002/004706

December 27, 2002

May 15, 2002

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TOKIMEC INC (JP)
KISHIMOTO MASAO (JP)
MOTEGI RYOHEI (JP)
SUZUKI YUKIHIKO (JP)
IWABUCHI HIROSHI (JP)

G01F1/66; G01P5/24; (IPC1-7): G01F1/66; G01F1/10; G01P5/24

JPS5182658A	1976-07-20
JPS5379573A	1978-07-14
JPS5570760A	1980-05-28
JPH03180767A	1991-08-06
JPH06180324A	1994-06-28
JPH07500662A	1995-01-19
JPH10221140A	1998-08-21
JPH11514443A	1999-12-07

See also references of EP 1394515A4

Ishido, Hisako (Sanno Urban Life 1-8, Sanno 2-chom, Ota-ku Tokyo, JP)

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