G - Physics – 01 – S
Patent
G - Physics
01
S
349/31
G01S 11/00 (2006.01) B66F 9/075 (2006.01) G01S 11/14 (2006.01)
Patent
CA 1128190
BF&N 6810 ULTRASONIC DISTANCE MEASURING CIRCUIT ABSTRACT OF THE DISCLOSURE An output distance signal related to the distance between an ultrasonic transmitting transducer and an ultrasonic receiving transducer is provided by an apparatus including a reference oscillator and a burst generator responsive to the reference oscillator which periodically generates ultrasonic burst signals. The ultrasonic transmitting transducer is responsive to the generator for providing an ultrasonic acoustic energy burst in response to each of the ultrasonic burst signals. An ultrasonic receiving transducer receives the ultrasonic acoustic energy bursts and generates detection signals in response thereto. A range window circuit is responsive to detection of an acoustic energy burst by the receiving transducer, for providing a range window signal at a time period lagging the detection signal such that a range gate will be opened for passage of the next following detection signal. A converter is responsive to the range gate and to the burst signals for providing an output distance signal, related in potential to the distance between the transmitting and receiving transducers.
351453
Crown Controls Corporation
Gowling Lafleur Henderson Llp
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