Protective zone device for a vehicle

Details Protective zone device for a vehicle Protective zone device for a vehicle

1985-06-06

1987-05-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502221, 180169, G01V 904, B60T 716, B62D 124

Patent

active

046688595

ABSTRACT:
A protective zone apparatus on a vehicle capable of travelling along a path has a light transmitter (16) and a light receiver (18). The transmitted light beam (11) is obliquely directed onto the path of travel (12) at a first fixed angle (.alpha.) and executes a scanning movement about an axis (13) perpendicular to the path of travel (12). The received light beam extends at a second fixed angle (.beta.) from the point of impingement (15) of the transmitted light beam (11) on the path of travel (12) to the perpendicular axis (13) and executes a scanning movement synchronous with that of the transmitted light beam (11). An electronic processing circuit transmits a control signal which stops the vehicle if an obstacle arises in the protective zone (FIG. 1).

REFERENCES:
patent: 3749197 (1973-07-01), Deutsch
patent: 4558215 (1985-12-01), Kaneko et al.

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