| 摘要 |
<p>A navigation system for guiding an automatically guided vehicle having vehicle control means along a variable, pre-determined path defined by a plurality of fixed, spaced-apart points, A target positioned at each spaced-apart point defining the vehicle path, said target including a first light source for emitting a first light beam and a second light source horizontally spaced-apart from said first light source for emitting a second light beam; A light receiving camera and lens mounted on the vehicle for receiving said first and second horizontally spaced-apart light beams and focusing said beams on a detector, said detector having a vertically extending axis representing the path of the vehicle to the target, said beams being focused on said detector at two spaced-apart points on opposite sides of the vertically extending axis wherein a difference in distance from the vertical axis of the detector of said two spaced-apart points represents a deviation from the proper path of the vehicle to said target and an equality of distance of two said spaced-apart points to said vertically extending axis represents the proper path to the target, Said detector including means for converting said first and second light beams into a signal representing a bearing of the vehicle from the target and outputting said signal to the vehicle control means for controlling the vehicle position</p> |
