Communications – electrical: acoustic wave systems and devices – Distance or direction finding – By combining or comparing signals
Patent
1994-02-08
1995-08-15
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
By combining or comparing signals
367902, 7386118, 7386127, G01S 1114, G01N 2900
Patent
active
054425921
ABSTRACT:
An ultrasonic distance meter cancels out the effects of temperature and humidity variations by including a measuring unit and a reference unit. In each of the units, a repetitive series of pulses is generated, each having a repetition rate directly related to the respective distance between an electroacoustic transmitter and an electroacoustic receiver. The pulse trains are provided to respective counters, and the ratio of the counter outputs is utilized to determine the distance being measured.
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Park Kyung T.
Toda Minoru
Lobo Ian J.
McCarthy Kevin D.
The Whitaker Corporation
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