Image fire detector possessing optical integrity and method thereof

Abstract

An image fire detector possessing optical integrity and a method thereof belong to a fire detection technology field. The detector comprises: a shell, a detection light source I, a detection light source II, a light source driving circuit I, a light source driving circuit II, an infrared thermal image sensor, a CCD sensor, a protection lens I, a protection lens II, a temperature control circuit I, a temperature control circuit II, a image acquisition and signal processing circuit, a power conversion circuit and a signal output circuit. The infrared thermal image sensor is used to monitor a temperature abnormity signal before a fire hazard is generated. The temperature abnormity can be timely discovered. Combining an infrared thermal image, acquisition and analysis of a visible image, far-infrared light, near infrared light and the visible optical signal are detected so as to realize the optical integrity. Visible image data during the fire hazard is combined with the image data and temperature data in the fire infrared thermal image so as to process and determine the data. Fire alarm can be timely and accurately determined and an alarm signal can be given. A rate of false alarm can be substantially reduced and anti-interference performance of the detector can be increased.

Description

technical field [0001] The invention belongs to the technical field of fire detection, in particular to an image fire detector with optical integrity and a method thereof. Background technique [0002] At present, with the rapid development of economic construction, there are more and more large space places and industrial places, and the use of large electric equipment is also increasing. The image type fire detector has the characteristics of large protection range and fast response speed, and is suitable for large space The fire detection and protection of places and industrial places, so the number of its installation and use is also increasing. As fire safety has received more and more attention, more and higher requirements have been put forward for fire safety. [0003] In the prior art, visible light or near-infrared image-type fire detectors mainly use the visible light image features of fire smoke and flames to judge fires through algorithms, and feedback the actu...

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Problems solved by technology

[0004] Visible light or near-infrared image fire detectors are widely used at present. The advantages of these detectors are: they can respond quickly to open flames or thick smoke in the protected area, and can detect fires early; their disadvantages are: False alarms occur from time to time; the environment in the protection area is complex, light interference, strong electromagnetic interference and dusty, many detectors fail within a short period of time after they are put into operation, and reliable detection in the protection area cannot be achieved Safety management brings hidden dangers. This is because the visible and near-infrared image fire detectors belong to the passive detection principle. When a fire occurs, the visible and near-infrared images of the fire are incident on the sensor through the detector window, and the detector can realize detection, and when the window of the detector is polluted or there is an abnormal occlusion within the protection range, the detection performance will be seriously reduced, and the protection ability may even be lost

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