Laser optical path degradation detecting device

Details Laser optical path degradation detecting device Laser optical path degradation detecting device

1997-03-04

1998-12-22

Tong, Nina

Communications: electrical

External condition vehicle-mounted indicator or alarm

Transmitter in another vehicle

340435, 340436, 340901, 340904, 307 101, 180169, 342 70, 342 71, 342 72, 367909, 356 401, 356 402, 356 501, 356218, G08G 116

Patent

active

058524100

ABSTRACT:
An optical path degradation detecting device having a laser distance detector which uses a laser beam to detect the distance between two objects and which generates distance signals representative of the distance between the two objects. A first predetermined point signal is generated upon the distance signals being in a distance representative of a first predetermined distance or less, and a second predetermined point signal is generated upon the distance signals being in a distance representative of a second predetermined distance or less, wherein the second predetermined distance is less than the first predetermined distance. A fault signal is generated if the second predetermined point signal is generated within a predetermined time interval relative to the generation of the first predetermined point signal.

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patent: 5600561 (1997-02-01), Okamura

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