Echo recognition system

Details Echo recognition system Echo recognition system

1981-05-26

1983-04-19

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

343 5VQ, G01S 766, G01S 1504

Patent

active

043808077

ABSTRACT:
An echo-type range finding system is rendered unresponsive to spurious signals and electronic noise, and has its object distance determining accuracy improved by rejecting signals that do not persist for a predetermined period of time.

REFERENCES:
patent: 3098210 (1963-07-01), Sparling et al.
patent: 3351896 (1967-11-01), Rowlands
patent: 3562703 (1971-02-01), Grada
patent: 4014018 (1977-03-01), Williams et al.
patent: 4145914 (1979-03-01), Newman
patent: 4199246 (1980-04-01), Muggli

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