Ultrasonic ranging system
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United States of America Patent
Stats
-
Oct 20, 1987
Grant Date -
N/A
app pub date -
May 16, 1986
filing date -
May 16, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ultrasonic ranging system includes transformer means with a transformer which is selectively energized to produce a transducer drive signal. An ultrasonic transducer transmits an ultrasonic pulse in response to the drive signal and develops an echo signal upon receipt of an echo pulse derived from the ultrasonic pulse; a shunt switch is connected across a winding of the transformer and is selectively closed to quickly damp the ringing following the transmission of an ultrasonic pulse to a level substantially below the level of the echo signal to permit close ranging.
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