Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1980-01-23
1982-05-11
Buczinski, S. C.
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
356 4, G01P 336
Patent
active
043290477
ABSTRACT:
An optical velocity measuring apparatus applicable to measurement of the velocity of a vehicle relative to the road. A pair of light sensors mounted on the bottom of the vehicle body spaced from each other in a direction of the movement of the vehicle respectively receive rays of light reflected from different spots on the road through an optical system and produce electric signals indicative of the surface conditions of the spots. A time lag from the detection of a particular spot by the forward light sensor until the backward light sensor detects the same spot is measured to determine the velocity of the vehicle. The optical system is comprised of first and second lenses each having a peripheral portion cut away by a plane parallel to the optical axis. The first and second lenses are aligned so that the cut away faces are in contact with each other and that the optical axes are in parallel to and spaced a predetermined distance from each other.
REFERENCES:
patent: 3508066 (1970-04-01), Agar
patent: 3799671 (1974-03-01), Schweizer
patent: 3804517 (1974-04-01), Meyr et al.
patent: 4091275 (1978-05-01), Wilwerding
patent: 4167330 (1979-09-01), Haville
Ishihara Yasumasa
Kikuchi Tetsuro
Sasaya Hideaki
Buczinski S. C.
Nippon Soken Inc.
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