Integrated automatic control for ultrasonic proximity switches

Details Integrated automatic control for ultrasonic proximity switches Integrated automatic control for ultrasonic proximity switches

1991-11-05

1992-09-01

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

G01S 1500

Patent

active

051445930

ABSTRACT:
The transmitting pulse required to operate an ultrasonic proximity switch is usually generated externally in separate evaluation electronics. This requires additional circuitry, either analog or digital circuits, or a microprocessor and associated software. In the case of ultrasonic proximity switches, which have an integrated circuit with transmitting oscillator, the generation of the transmitting pulse is performed by additional means provided on the integrated circuit for generating a transmitting clock pulse. By means of a control signal, it is possible to select between the operation with this transmitting clock pulse and a transmitting clock pulse supplied externally by the evaluation electronics.

REFERENCES:
patent: 3863196 (1975-01-01), Hilles
patent: 4347592 (1982-08-01), Langeraar

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