Security sensor arrangement
First Claim
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1. A sensor apparatus comprising:
- a signal processor;
a first sensor having a sectored predetermined field of view and a signal output representative of at least one characteristic of at least one sector of said field of view; and
a second sensor having a sectored predetermined field of view and a signal output representative of at least one characteristic of at least one sector of said field of view;
wherein said first sensor is a spatially higher resolution sensor than said second sensor, and said first sensor is sectored such that each of a plurality of sectors lie within or are spatially equal to a respective plurality of sectors of said second sensor, and said processor is adapted to process at least said first and second sensor signal outputs for each of said respective sectors of said first and second sensors to determine whether said signals are representative of common activity in those respective sectors and only if that is so provide an output signal representative of that common activity.
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Abstract
In one embodiment, the present invention provides an apparatus which includes at least two sensors whose overlapping fields of view are matched by sectorization. Sensor signal output processing of a high resolution sensor and a low resolution sensor provide a detection device which achieves a substantially higher performance over devices which only logically combine the outputs of two individual detectors. In a particular embodiment, the high resolution sensor senses a visible wavelength, such as by video camera, and the low resolution is an infrared thermal sensor.
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Citations
16 Claims
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1. A sensor apparatus comprising:
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a signal processor; a first sensor having a sectored predetermined field of view and a signal output representative of at least one characteristic of at least one sector of said field of view; and a second sensor having a sectored predetermined field of view and a signal output representative of at least one characteristic of at least one sector of said field of view; wherein said first sensor is a spatially higher resolution sensor than said second sensor, and said first sensor is sectored such that each of a plurality of sectors lie within or are spatially equal to a respective plurality of sectors of said second sensor, and said processor is adapted to process at least said first and second sensor signal outputs for each of said respective sectors of said first and second sensors to determine whether said signals are representative of common activity in those respective sectors and only if that is so provide an output signal representative of that common activity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification