Use of detector arrays to detect cessation of motion
AssigneeInfrared Integrated Systems Limited
InventorsBryan Lorrain Humphreys Wilson, Stephen Hollock, Stephen George Porter
Life of this patent
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Abstract
A sensor comprising an array of detectors for e.g. infrared radiation of the type for use in security or surveillance application has means for identifying the entry of an object into a first selected area of a scene and means for generating a warning or alarm signal after a first predetermined period of time during which there is no movement of the body within the first selected area.
Claims8
A sensor comprising a two-dimensional array of detectors, optical collection means arranged so that the spatial information from the scene is focused onto the array, read-out means for monitoring signals from the detectors of the array, means responsive to said readout means for identifying the entry of an object into first selected area of the scene and means for generating a warning signal after a first predetermined period of time during which there is no movement of the object within or near to the first selected area.
Dependencies are inferred from the claim text.