Speed measurement device
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United States of America Patent
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-
Nov 17, 1992
Grant Date -
N/A
app pub date -
Jun 9, 1989
filing date -
Jun 9, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fluid speed measurement device includes a pair of ultrasonic transducer T1,T2 spaced in a measuring chamber. A transmitter and receiver system is controlled by a microprocessor 100 which generates pulses which periodically invert and these are switched by switches 140,150 to allow alternate direction of transmission. Reception and detection of signals is effected by blocks 152-168. Time calculation is determined by counter 109 and results are used to calculate flow speed or volume using the microprocessor. A speed increase in the measurement region is effected using a venturi device.
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