Patent ID: 6091327
Filing Date: 2000-07-18
Classification: G01S,G01W

Abstract:
System for surveillance of determined phenomena, that emit signals with a geographically limited and time-varying geographical distribution, in a geographical area in which these phenomena can be detected with the aid of the signals which the phenomena emit,at least one information centre arranged to control sub-units belonging to the system via information transfer,at least three cells for each information centre included in the system, where these cells are arranged to function as sub-units for an information centre and where certain of these cells are arranged so that, from this information centre via the information transfer, they can be activated and deactivated and, with the aid of sensors, detect the signals which the phenomena emit, at least two of said cells detecting signals emitted by the same phenomena, and where certain of these cells, from distinctive features of the detected signals, in dependence upon decision criteria stored in the cells and without cooperation of the information centre, can determine whether to activate at least one output signal.