Collision predicting operation system

Details Collision predicting operation system Collision predicting operation system

1974-01-14

1977-02-15

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 8, 343112CA, 343 9, G01S 944

Patent

active

040084736

ABSTRACT:
There is provided a collision predicting operation system comprising a radar circuit whereby a reflected wave which has been radiated from an oscillator and encountered and reflected from a target is received and caused to interfere with the radiated wave to generate a doppler signal, an oscillator circuit group for generating a periodic wave synchronized with the doppler signal when the amplitude of the doppler signal is higher than a predetermined value and its frequency is within a predetermined range, means for changing the oscillation frequency of the oscillator in synchronization with the periodic wave, and means for detecting the polarity and the amount of change of the phase of the doppler signal changed by the frequency modulating means.

REFERENCES:
patent: 3308458 (1967-03-01), Schulze
patent: 3407403 (1968-10-01), Charlot, Jr.
patent: 3438020 (1969-04-01), Lerner
patent: 3713151 (1973-01-01), Kofsky
patent: 3805263 (1974-04-01), Ueda
patent: 3921169 (1975-11-01), Lazarchik et al.

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