SYSTEM FOR TRACKING A MOBILE TARGET

摘要

A method and system for tracking a mobile target within a monitored space using at least three fixed directional detectors having respective responsitivities which vary with angular position around the detector and being positioned around a reference axis with their respective detection axes angularly spaced apart and inclined towards said monitored space such that the detectors have angularly overlapping response characteristics and a combined non-uniform resonsivity profile. A signal is emitted at a source on the mobile target so that the at least three detectors provide respective electrical output signals (R,G,B). Chromatic processing is effected to transform the output signals (R, G, B) into at least first and second chomatic parameters (Hs, Ls) whose values are dependent upon the position of the target in said monitored space and the position of the target is determined based on the values of the chromatic parameters (Hs, Ls).