A wheelchair navigation system for a motorized wheelchair includes dual
cameras, proximity sensors, microphones, and rotation sensors for the
wheels. Small markers are placed on the walls of a location or room. The
navigation system uses the proximity sensors, rotation sensors and
cameras in conjunction with the specialized software to determine where
objects or impediments are located in the room and thereby redirect the
path of the wheelchair so as to avoid such objects. The wheelchair is
walked through the marked location thereby `teaching` various paths which
are recorded in the computer and recalled later when the wheelchair is in
use. The proximity sensor perform sensing operations during performance
of the teaching functions for thereby permitting avoidance of wheelchair
collision with obstacles during navigation of the wheelchair through a
taught trajectory and allowing for close approach of the wheelchair to
solid bodies present during performance of the teaching functions.