Microwave speed meter

Details Microwave speed meter Microwave speed meter

1979-06-04

1981-06-30

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 8, G01S 1358

Patent

active

042765480

ABSTRACT:
A meter for measuring the relative velocity of an object, including a diplexer for illuminating the object with a beam of microwave energy and for developing from energy reflected from the object a difference signal having a frequency which is proportional to the relative velocity of the object, a phase-locked loop for synchronizing the frequency of an internal oscillator with that of the difference signal and for developing a lock signal when synchronization is achieved, a lock detector and timer and a timer for developing a reset signal from the lock signal, a predetermined period after synchronization is achieved and for developing a latch signal a predetermined period thereafter, a circuit for counting the cycles of the internal oscillator which are developed after the occurrence of the reset signal until the occurrence of the latch signal to develop a sum signal indicative of the relative velocity of the object, and a circuit for displaying the sum signal.

REFERENCES:
patent: 3534285 (1970-10-01), Kobold et al.
patent: 3729736 (1973-04-01), Hurd
patent: 4020490 (1977-04-01), Millard
patent: 4052722 (1977-10-01), Millard
patent: 4072947 (1978-02-01), Johnson
patent: 4143376 (1979-03-01), Jezo

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