A navigation system for guiding an automatically guided vehicle along a variable, predetermined path defined by a plurality of fixed, spaced-apart points. A target is positioned at each spaced-apart point defining the target which includes first and light sources spaced horizontally apart. A light receiving...http://www.google.es/patents/US4858132?utm_source=gb-gplus-sharePatente US4858132 - Optical navigation system for an automatic guided vehicle, and method
Optical navigation system for an automatic guided vehicle, and method
