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Multiband infrared image-type fire detecting system and fire alarm system thereof

An infrared image and fire detection technology, which is applied to fire alarms and picture signal generators that rely on radiation effects, can solve problems such as loss of function

Inactive Publication Date: 2009-11-11
官洪运
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional detection methods are

Method used

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  • Multiband infrared image-type fire detecting system and fire alarm system thereof
  • Multiband infrared image-type fire detecting system and fire alarm system thereof
  • Multiband infrared image-type fire detecting system and fire alarm system thereof

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Experimental program
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Effect test

Embodiment 1

[0257] Embodiment 1: in combination with Figure 10 It can be seen that in the multi-band infrared image type fire detection system, the image acquisition unit is composed of a semi-transparent and semi-reflective beam splitter, an infrared filter, a USB camera 1 and a USB camera 2, and the camera 1 with a 0.8 μm wavelength filter and the additional The camera 2 with a 1.0 μm wavelength filter is fixed towards two vertical light paths, and monitors the monitored area simultaneously through a semi-transparent and semi-reflective beam splitter. The image acquisition unit transmits the collected images to the image processing and control unit, and after processing by the image processing and control unit, it judges whether the collected infrared images conform to the characteristics of the fire, and immediately reports to the alarm unit if it meets the preset value.

[0258] The USB camera 1 and the USB camera 2 are of HD-HV1302UM type; the USB camera used in the present inventio...

Embodiment 2

[0261] Embodiment 2: In Embodiment 1, the selection of the wavelength of the optical filter can be based on the needs of specific fire detection occasions, according to Wien's theorem to calculate the infrared wavelength of the required detection temperature and according to the responsivity of different image acquisition devices to the imaging wavelength Choose a different wavelength. If a camera (thermal imager) made of an infrared focal plane is used, it is only necessary to calculate the wavelength of the infrared filter for the required detection temperature according to Wien's theorem. For example, if the ignition point of wood is 250°C to 300°C, the wavelength of the infrared filter should be selected between 5.54 μm and 5.06 μm, and the ignition point of cotton is 210°C to 255°C, then the wavelength of the infrared filter should be selected from 6.0 μm to 5.49 μm If the surface temperature of the cigarette butt is 700℃~800℃, the wavelength of the infrared filter should...

Embodiment 3

[0262] Embodiment 3: in embodiment 2 or embodiment 1, image acquisition unit also comprises a color camera 3 that does not install additional filter, when the image that camera 1 and camera 2 monitors is found to meet preset value, does not install additional filter The color camera 3 of the light sheet starts to capture fire images.

[0263] The color camera 3 is model HD-HV1302UC.

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Abstract

The invention relates to the field of fire-fighting, in particular to an image identification-based fire detecting system and a fire alarm system thereof. The multiband infrared image-type fire detecting system comprises an image acquisition unit, an image processing unit and an alarming unit, wherein the image acquisition unit sends the collected images to the image processing unit; according to the processing algorithm of the image processing unit, the collected infrared images are judged whether to meet the characteristics of the fire; for the images which meet the fire default values, alarming to the alarming unit is conducted; and the image acquisition unit comprises a half transparent and half reflecting beam splitter, an infrared filter and a camera, wherein the monitored area is synchronously monitored by two cameras added with infrared filters with different wavelengths through the half transparent and half reflecting beam splitter. The invention has the advantages of being sacred from the limitation of environmental conditions such as spatial height, heat barrier, easy explosive, poisonousness and the like, being capable of conducting early stage fire detection in large space and outdoor open space, low cost and the like.

Description

technical field [0001] The invention relates to the field of fire protection, in particular to a fire detection system based on image recognition and a fire early warning method thereof. Background technique [0002] With the development of mankind to this day, fire is still a major disaster that threatens the safety of human life. Fire not only devours people's property, but also takes people's lives. Its huge harm is self-evident. People have been looking for new technologies and methods in order to detect and control fires and reduce the disasters caused by "fire" to the greatest extent. [0003] At present, the general fire detection method is to detect the smoke generated when a fire occurs, and send out a fire alarm signal after signal processing, comparison and judgment, but this kind of alarm system is mostly an alarm after the fire has formed. [0004] However, with the continuous development of society and the continuous reduction of urban land, urban buildings a...

Claims

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Application Information

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IPC IPC(8): G08B17/12H04N9/04
Inventor 官洪运官慧峰李江单一帆
Owner 官洪运
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