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5 Conclusions
The ultra low cost system presented in this paper is capable of locating the position of
a target on a grid plane covering distances of more than one meter with adequate
accuracy (less than 10cm error). The coordinate estimation method is based on the
success rate that multiple pattern types are received at a specific position. The closer
node of the grid is located first and then a 2D interpolation search estimates the exact
target position. Using an appropriate topology of the pattern transmitting devices, the
grid squares that allow reliable position estimation were mapped. The factors
affecting the speed of the position estimation method were also discussed.
Future work will focus on studying proper topologies of more than 2 infrared
transmitting devices in order to extend optimally the area covered. Moreover, it will
be attempted to increase the degrees of freedom of the moving target. The history of
movements of the target will also be exploited in order to predict potential future
positions and increase the stability of the coordinate estimation.
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