Vehicle guidance means

Details Vehicle guidance means Vehicle guidance means

G - Physics

05

D

343/7, 341/84

G05D 1/02 (2006.01) G01S 17/66 (2006.01) G01S 17/88 (2006.01)

Patent

CA 1273425

- 18 - ABSTRACT A vehicle guidance system for a tractor has a horizontal scanning laser on the tractor and a target arranged to return the laser beam along its path. When returned laser light is detected, indicating alignment of the beam with the target, the angle of the beam relative to the tractor axis illustrates the steering correction required. The target has an array of beam reflecting elements patterned to define a target datum. Continuous low amplitude and relative high frequency scanning of the laser in a vertical direction provides a detector output which is indicative of the error between beam orientation and target datum.

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