Device operating on the doppler principle to determine the dista

Details Device operating on the doppler principle to determine the dista Device operating on the doppler principle to determine the dista

1988-10-21

1990-04-24

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Return signal controls external device

Radar mounted on and controls land vehicle

342117, G01S 1360, G01S 1362

Patent

active

049203452

ABSTRACT:
Contactless measurement of the distance traveled by a vehicle during selected time intervals is provided by a device operating on the Doppler principle. The device has a "phase-locked loop" circuit which generates pulse signals having a frequency proportional to the vehicle velocity. Using the pulses as path length increases, the pulses are added in a counter and the counter output is supplied to an indicating unit to indicate the distance traveled by the vehicle.

REFERENCES:
patent: 3859660 (1975-01-01), Augustine et al.
patent: 4012736 (1977-03-01), Angwin
patent: 4065745 (1977-12-01), Robinson
patent: 4414548 (1983-11-01), Carpenter et al.
patent: 4635059 (1987-01-01), Ball

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