In this paper we present a system that is capable of estimating the position of a moving target on a grid plane covered by a pair of infrared transmitters. The area of this plane can be up to 15m{sup}2, further expandable if multiple transmitters are used. The position estimation method is based on comparing the number of infrared patterns received to the expected ones in a specific time interval (success rate). Using this method, no signal strength or time of flight has to be precisely measured, leading to an ultra low cost architecture. A proper topology of the infrared transmitters that optimally cover the desired area is discussed. The history of movements of the target is utilized in order to reject false estimations. The error achieved is below the half of the grid node distance.
展开▼
