Object detecting switch device

Details Object detecting switch device Object detecting switch device

1990-01-18

1991-04-16

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367 99, 367135, 367903, 367901, G01S 1508

Patent

active

050088629

ABSTRACT:
A switch device is disclosed for detecting an object which comprises a transducer for emitting and receiving ultrasonic signals to and from an object, a transmitter for driving the transducer, a receiver for receiving a signal from the transducer, a gate for detecting a short-distant object, a gate for detecting a long-distant object, and a circuit for setting the timings of the gates in accordance with the detecting ranges of the object.

REFERENCES:
patent: 4326273 (1982-04-01), Vancha
patent: 4332016 (1982-05-01), Berntsen
patent: 4489319 (1984-12-01), Hansen
patent: 4561064 (1985-12-01), Bruggen et al.
patent: 4606015 (1986-08-01), Yamaguchi
patent: 4679175 (1987-07-01), Eder et al.
patent: 4717916 (1988-01-01), Adams et al.
patent: 4785429 (1988-11-01), Folwell et al.

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