Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1980-09-26
1982-06-22
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
367138, 367903, 370 32, G01S 1588
Patent
active
043366058
ABSTRACT:
A multiplexer for an ultrasonic ranging device for a vehicle having a resettable digital counter is disclosed herein. The digital counter receives a plurality of pulses from an oscillator and provides a counter output signal indicative of the stored count of the number of pulses. A plurality of logic gates are connected to the digital counter for control thereby. A plurality of ultrasonic transducers are connected to the logic gates, the logic gates sequentially energizing the transducers in response to the stored count in the digital counter.
REFERENCES:
patent: 3757285 (1973-09-01), Ferre
patent: 3876938 (1975-04-01), Ohta et al.
patent: 4045766 (1977-08-01), Iida et al.
patent: 4225951 (1980-09-01), Menin et al.
Clark George R.
Farley Richard A.
Fox Robert J.
Hurst Performance, Inc.
Rose Neil M.
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