Doppler flow velocity meter
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United States of America Patent
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-
Sep 10, 1991
Grant Date -
N/A
app pub date -
Sep 7, 1989
filing date -
Oct 3, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A Doppler measuring device for measuring the flow velocity of a fluid which carries particles which reflect ultrasonic waves is described. The device includes an ultrasonic transducer for insonating the fluid with ultrasonic wave pulses in response to corresponding transmit pulses supplied to the transducer at a predetermined pulse repetition rate. A transmitter connected to a transducer and adapted to produce transmission pulses which excite the transducer to deliver the ultrasonic wave pulses is present. The device also includes a receiver connected to the transducer to receive and process echo signals corresponding to at least two groups of echo waves reflected by particles in the fluid, and an evaluator connected to the output of the receiver to derive from the Doppler information obtained by the receiver an output signal corresponding to the flow velocity.
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