Position measuring apparatus of moving vehicle

Details Position measuring apparatus of moving vehicle Position measuring apparatus of moving vehicle

1986-03-20

1988-03-08

Rosenberger, R. A

Optics: measuring and testing

By polarized light examination

With light attenuation

180109, 364424, 356152, G01B 1114

Patent

active

047296607

ABSTRACT:
Light reflecting means 2R and 2L provided on both sides of a road 1 each reflect an incident light at the same angle as the angle of incidence with respect to the plane of incidence. Lights 8R and 8L emitted from a moving vehicle 3 are reflected from the light reflecting means 2R and 2L and returned again to the light emitting source and accordingly they are detected by light receivers 75R and 75L. The position of the moving vehicle 3 is calculated geometrically based on the moving distance of the moving vehicle 3 in a period obtained from the difference between the light receiving time of the light receiver 75R and that of the light receiver 75L or the light receiving angle as well as the moving direction of the moving vehicle 3 and the positions where the light reflecting means 2R and 2L are installed.

REFERENCES:
patent: 4049961 (1977-09-01), Marcy
patent: 4225226 (1980-09-01), Davidson et al.
patent: 4309758 (1982-01-01), Halsall et al.

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