Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control
Patent
1980-08-28
1983-03-15
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Echo systems
Returned signal used for control
343 7PL, 343 75, 367 97, 367101, G01S 1508, G01S 766
Patent
active
043769900
ABSTRACT:
A device for the transit time measurement of electric, electromagnetic or oustic signals, particularly supersonic signals, of at least one predetermined frequency range, having a signal transmitter for the sending of measurement signals to an object and a signal receiver for the receiving of the measurement signals reflected by the object which have a substantially predetermined frequency corresponding to the frequency of the other signals sent and having a time measuring device for determining the transit time of the measurement signals between the signal transmitter and/or receiver and an object, from which the distance of the object from the signal transmitter and/or the signal receiver can be derived. A signal generator is provided both at least to trigger the signal transmitter and to control the signal receiver, and a filter stage for the tuning of the signal receiver in accordance with the reception frequency and for filtering out external frequencies is connected with the signal generator.
REFERENCES:
patent: 2418538 (1947-04-01), Yetter
patent: 2994060 (1961-07-01), Ross
patent: 3178677 (1965-04-01), Hadley et al.
patent: 3295127 (1966-12-01), Kross
patent: 3730628 (1973-05-01), Wolcott et al.
patent: 4107684 (1978-08-01), Watson, Jr.
"Eumig" Elektrizitats- und Metallwaren-Industrie Gesellschaft m.
Farber Martin A.
Farley Richard A.
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