A Sensors System for Indoor Localisation of a Moving Target Based on Infrared Pattern Recognition

Abstract

A novel method for the indoor localisation of a target was presented in this chapter. This method is based on measuring the number of the digital infrared patterns received by the target in a specific time interval (success rate). At least two transmitting devices are placed around the covered area that exceeds 15m2, while a pair of infrared receivers are mounted on the target. This area is supposed to be covered by a virtual grid and can be further extended if more transmitters are employed. The grid nodes are visited by the target during a calibration stage when it familiarises with the retrieved success rates. At real time operation the closer grid node is selected and a refinement step based on a 2D interpolation search follows leading to a more accurate position estimation. The absolute error that can be achieved is less than 10cm but may vary significantly if successive estimations are carried out at the same position.