Ultrasonic device

Details Ultrasonic device Ultrasonic device

1983-08-22

1987-01-06

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

367 96, 367 99, 367103, G01S 1506

Patent

active

046352414

ABSTRACT:
The device comprises at least two ultrasonic transducers emitting focused radiation and a circuit making it possible to measure the difference between the sampled signals supplied by these two transducers. This difference is cancelled out when the probe faces the object.
Application to metrology and the position control of objects.

REFERENCES:
patent: 2743429 (1956-04-01), Erdman et al.
patent: 3149561 (1964-09-01), Lancaster
patent: 4206511 (1980-06-01), Ries et al.
patent: 4235112 (1980-11-01), Kaiser

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