An indoor navigation approach to aid the physically disabled people

Physical disability becomes a major obstacle in the lives of physically challenged people and they are deprived of performing even their day-to-day activities without anybody´s aid. One of the common problems they face is navigating their own home. So we proposed a system which aids such people to navigate their home or any indoor environment with all ease. Using this system not only can they reach any desired room in their home, they could also reach to the commonly used places inside a room such as sofa, television, refrigerator or any such commonly used places using voice commands. This can be done using the indoor positioning technique. The given area of the house is mapped into the system. The user´s location is triangulated by applying lateration techniques such as time difference of arrival and angle of arrival. The location of the target places should be already marked which is essentially done using the same indoor positioning approach. A virtual line is drawn from the current location to the targeted location and the wheelchair is made to travel along the path calculating the coordinates dynamically and comparing with the already known coordinates of the line from the system thus making the wheelchair navigate correctly. We also provide an obstacle avoidance technique suitable for this type of navigation which detects dynamic obstacles present in the real time environment. This proposed system can be of immense use to various physically disabled people and thus making their lives easy without any external aid.