Measuring system for testing the position of a vehicle and sensi

Details Measuring system for testing the position of a vehicle and sensi Measuring system for testing the position of a vehicle and sensi

1997-03-26

1998-04-28

Nelms, David C.

Optics: measuring and testing

By polarized light examination

With light attenuation

356141, G01B 1100

Patent

active

057452350

ABSTRACT:
A measuring system for testing the position of a vehicle (1) includes a number of optical beacons (6 and 7), a sensing device (10) which is mounted on the vehicle (1) and which generates a position signal when sensing light reflected from a beacon (65 or 7), and a computer processing unit (14) for calculating, starting from the information received from the sensing device (10), the deviation of the vehicle relative to the desired position and driving direction of the vehicle. The sensing device (10) includes two cameras which are mounted on the vehicle, namely, a first camera which is directed approximately along the driving direction, and a second camera which is directed along a direction vertically upward or downward relative to the plane including the path of travel of the vehicle. At least one of the beacons (6) is placed in such a way that, during the motion of the vehicle approximately along the desires path, the beacon can be seen by the sensing device (10) along the driving direction of the vehicle. At least another one of the beacons (7) is positioned along the desired path, but is observable in the direction above or below the aforementioned plane of the path, and is situated above or below the sensing device (10), depending whether the second camera is directed upwards or downwards relative to the plane of the path or travel, each camera may include its own light projector.

REFERENCES:
patent: 4328545 (1982-05-01), Halsall et al.

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