A vehicle guidance and control system.

摘要

A vehicle guidance and control system has a number of trucks (10) whose movement is controlled by a base station. Each truck periodically fixes its own position in relation to marker boards (8) consisting of patterns of reflective coded stripes by scanning a narrow laser beam (14) in a predetermined direction across the stripes. Using at least two boards (8) its position can be determined by triangulation, and because the beam scans in a fixed direction, the positional accuracy can be determined by a particular stripe or edge of a stripe, and not by the size of a marker board as a whole.