PARTICLE DETECTOR, SYSTEM AND METHOD
First Claim
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1. A method of detecting particles comprising:
- emitting a first beam of radiation into a monitored region;
detecting a variation in images of the region with a first image capturing device such that the variation in images indicates the presence of the particles and wherein the variation in images corresponds to backscattered radiation;
determining a path loss measurement by recording the intensity of a target incident beam spot of the emitted first beam within the captured image; and
comparing the recorded intensity with a recorded intensity at a previous time.
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Abstract
The invention provides use of one or more emitted beams of radiation (16), for example, laser beam(s), in combination with an image capturing means (14), for example, one or more video cameras and/or optical elements to detect particles (30), for example, smoke particles, located in an open space (12).
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Citations
20 Claims
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1. A method of detecting particles comprising:
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emitting a first beam of radiation into a monitored region; detecting a variation in images of the region with a first image capturing device such that the variation in images indicates the presence of the particles and wherein the variation in images corresponds to backscattered radiation; determining a path loss measurement by recording the intensity of a target incident beam spot of the emitted first beam within the captured image; and comparing the recorded intensity with a recorded intensity at a previous time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A particle detection system comprising:
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a light source emitting a first beam of radiation into a monitored region; and a first image capturing device configured to detect a variation in images of the region such that the variation in images indicates the presence of the particles and wherein the light source and first image capturing device are arranged such that the variation in images corresponds to backscattered radiation; the particle detection system being further configured to; determine a path loss measurement by recording the intensity of a target incident beam spot of the emitted first beam within the captured images and; compare the recorded intensity with a recorded intensity at a previous time. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification