APPARATUS AND METHOD FOR DETERMINING THE POSITION OF A MOBILE PLATFORM

摘要

A mobile platform such as a shopping cart, flatbed cart or lift truck is provided with a plurality of radiation detectors which are screened or limited in scope of view and which cooperate with circuitry which can distinguish from the interaction of the sensors with emitters the position of the platform. Position consists of location and orientation. Each detector or sensor is screened to limit its view to a defined portion of a sphere.