Method and apparatus for measuring the distance between two stat

Details Method and apparatus for measuring the distance between two stat Method and apparatus for measuring the distance between two stat

1976-08-06

1978-02-07

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 65R, 343 13R, G01S 908, G01S 956

Patent

active

040729460

ABSTRACT:
A method and system for determining the distance between two stations interconnected through a carrier wave connection for data transmission by frequency modulation (FM) or phase modulation (PM) and, if necessary, transferring the data concerning the distance determined. At least one of the two stations is movable and each station comprises a transmitter, a receiver and a transceiver antenna for said FM or PM data transmission. During operation the antennas are interlocked. The carrier wave transmitted by the first station and being normally FM or PM modulated by data signals is interrupted a number of times in this station. Upon detection of each one of these interruptions, the second station introduces a similar, corresponding interruption into the carrier wave transmitted by this second station. The carrier wave is normally also FM or PM modulated by data signals. The period of time between the transmission and reception of the associated interruptions is measured in the first station as a measure of the distance between the stations.

REFERENCES:
patent: 2427523 (1947-09-01), Dolberg et al.
patent: 3117317 (1964-01-01), Kenyon
patent: 3270342 (1966-08-01), Stemmer
patent: 3298024 (1967-01-01), Bohm
patent: 3720468 (1973-03-01), Skagerlund
patent: 3730628 (1973-05-01), Wolcott et al.
patent: 3757324 (1973-09-01), Litchford
patent: 3772688 (1973-11-01), Smit et al.
patent: 3792471 (1974-02-01), Kingsbury
"Webster's Third New International Dictionary", 1965, p. 1182.

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