Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
Patent
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
Commissariat a l''Energie Atomique
Farley Richard A.
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