Tokimec Inc.

Hiroshi Iwabuchi

Ryohei Motegi

Masao Kishimoto

Yukihiko Suzuki

The present invention provides a small, low power consumption ultrasonic flow velocity meter. The burst signal generation sectiongenerates two kinds of burst signals with a phase difference and sends these burst signals to a pair of transmission/reception ultrasonic transducersandlocated on the upstream side and downstream side of the conduit to be measuredUpon reception of the corresponding burst signals, the pair of the transmission/reception ultrasonic transducersandconvert the burst signals, send ultrasonic waves with a phase difference to the conduit to be measuredreceive the ultrasonic wave sent by the other transmission/reception ultrasonic transducer and propagated through the conduit to be measured and convert the ultrasonic waves to received signals. These received signals are binarized through the binarization circuitsand, exclusive-ORed by the exclusive-OR circuitand converted to a phase difference signal indicating a phase difference and the flow velocity of the conduit to be measuredis measured based on this phase difference signal.

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Tokyo, Japan

Hiroshi Iwabuchi