Arrangement for the recognition of obstacles for motor vehicles

Details Arrangement for the recognition of obstacles for motor vehicles Arrangement for the recognition of obstacles for motor vehicles

1987-10-19

1989-04-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502221, 356 1, G01N 2186

Patent

active

048188875

ABSTRACT:
An arrangement for the recognition of obstacles for motor vehicles with a transmitter and a receiver for electromagnetic radiation which are directed to an examination area (close range) that commences in direct proximity of the motor vehicle; a second receiver is provided which together with the transmitter is directed to a second examination area (distance or long range) which commences at a considerably greater distance in front of the motor vehicle than the close range. As a result thereof, interfering reflections at water droplets (fog) can be far-reachingly excluded.

REFERENCES:
patent: 3493920 (1970-02-01), MacMunn
patent: 4325639 (1982-04-01), Richter
patent: 4582424 (1986-04-01), Kawabata
patent: 4659922 (1987-04-01), Duncan
patent: 4716298 (1987-12-01), Etoh

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