Speed detecting apparatus

Details Speed detecting apparatus Speed detecting apparatus

1995-02-09

1996-11-26

Sotomayor, John B.

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

Determining velocity

With plural beams

G01S 1360

Patent

active

055790127

ABSTRACT:
A speed detecting apparatus mounted on an object moving on the ground detects a Doppler frequency for computing a moving speed thereof by receiving reflection waves of a microwave signal or a millimeter wave transmitted to the ground. The apparatus comprises a plurality of transmitting/receiving systems each having an antenna and a transmitter/receiver, and a signal processing section for computing moving speed according to Doppler frequency detected by the transmitting/receiving systems. Directivity of an antenna provided in each of the plurality of transmitting/receiving systems is set at a different angle respectively.

REFERENCES:
patent: 4722222 (1988-02-01), Purdy et al.
patent: 4757714 (1988-07-01), Purdy et al.
patent: 4845506 (1989-07-01), Shibata et al.
patent: 4980633 (1990-12-01), Roskoni
patent: 5204682 (1993-04-01), Beasley

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