Method, device and system for the fusion of information originating from several sensors
AssigneeThales
InventorFrédéric PICHON
Life of this patent
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Abstract
The invention relates to a method, device and system for fusion of information originating from several sensors. The invention includes a mechanism for fusion of belief functions. To apply this mechanism, various information, knowledge and operations are modelled within the framework of the theory of belief functions: information provided by the sensors, knowledge regarding the propensity of the sensors to be in a given operating state, and merge operators for each operating state considered.
Claims11
A method for the fusion of information originating from several sensors (C1, C2) each producing a belief function (mC1, mC2) representing knowledge on a reasoning space (Ω), and comprising several states (E1, . . . , EN) each representing an operating state of the set of sensors, said method comprising:
- calculating a merged belief function (mF);
- and
- calculating conditional belief functions on the basis of the belief functions (mC1, mC2) produced by the sensors (C1, C2) and of a predefined base of operators (105) comprising associations between states of sensors and merge operators, wherein a conditional belief function represents knowledge of a sensor on the reasoning space (Ω) when the set of sensors is in a given operating state (E1, . . . , EN), and wherein a step of calculating the merged belief function (mF) uses the conditional belief functions calculated and knowledge (mE) arising from a knowledge base (104) regarding the operating state of the sensors.
A device for fusion of information originating from several sensors each producing a belief function representing knowledge on a reasoning space and comprising several operating states, the device comprising:
- means for the calculation of a merged belief function;
- means for the calculation of conditional belief functions, said means being linked to the sensors and to a predefined base of operators comprising associations between states of sensors and merge operators, a conditional belief function representing knowledge of a sensor on the reasoning space when said sensor is in a given operating state, and wherein the means for the calculation of the merged belief function uses the conditional belief functions calculated and knowledge regarding the operating state of the sensors originating from a knowledge base regarding the operating state of the sensors.
Dependencies are inferred from the claim text.