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The improvement of single baseline passive ranging systems using target IR intensity
Goran Dikić Branko Kovačević Zvonko Radosavljević
In this paper, passive range estimation using the ratio of infrared energy absorbed by the sensors placed at the end of a baseline is presented. This method is adopted in situations when the target directions are collinear or nearly collinear relative to the baseline and the principle of triangulation can not be applied for range estimation. As it can be seen from simulations, in these situations the number of appropriate relative errors can be 2-4 times smaller, depending on the target range and direction, if range estimations are based on the ratio of the target IR intensity. A method presented in this paper represents a complementary solution relative to the principle of triangulation. They both have to be used in a situation when only two passive IR sensors are used for target tracking. In this way the extended tracking area is obtained.
Key words: passive IR sensor, target tracking. |