Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Patent
1993-02-25
1999-05-18
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
342 71, 343785, G01S13/93
Patent
active
059054573
ABSTRACT:
A vehicle radar safety apparatus employs a radar for detecting an object in front and/or to the rear and sides of a vehicle and for producing an indication of the distance and closing speed between the vehicle and the detected object. A signal processing unit sums the vehicle speed and the closing speed between the vehicle and detected object and compares the summed output with a signal corresponding to the distance between the vehicle and the detected object to provide an output to a display indicating the vehicle's capability of stopping prior to colliding with the detected object. The output from the signal processing unit is optionally applied to an accelerator and/or brake control circuit to automatically slow down the vehicle. A brake pedal override switch is connected to the accelerator and brake controls to override the accelerator and/or brake controls when the vehicle operator depresses the vehicle brake pedal. The radar includes a horn antenna having a plano-convex dielectric lens mounted at an exterior end. The lens has an exterior convex surface shaped to reduce side lobe generation of the transmitted radar wave so as to transmit a radar wave of a minimal beam width at a specified operating frequency and effective radar antenna diameter.
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