Fire detection method and device for realizing same

A technology of fire detection and real-time detection, which is applied in measuring devices, radiation pyrometry, and fire alarms relying on radiation effects, etc. It can solve problems such as inability to accurately detect fire sources, inability to accurately detect fire sources, and distance effects. Achieve the effects of improving detection sensitivity, reducing false alarms of fire sources, and improving accuracy

Active Publication Date: 2014-04-16
TIANJIN JINHANG INST OF TECH PHYSICS
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Problems solved by technology

This kind of detection device is mostly realized by near-infrared temperature measuring instrument, which is seriously affected by the distance and cannot accurately detect the fire source
Some also use infrared imagers to obtain infrared images, and detect fire sources based on infrared images. However, at this stage, this method only uses image analysis methods, and is not combined with infrared imager control. It also has complex backgrounds and cannot accurately detect fire sources. defect

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  • Fire detection method and device for realizing same
  • Fire detection method and device for realizing same
  • Fire detection method and device for realizing same

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Embodiment Construction

[0028] A fire detection method of the present invention and its implementation device are introduced below in conjunction with the accompanying drawings and embodiments:

[0029] Such as figure 1 Shown, a kind of fire detection method comprises the following steps:

[0030] Step 1: Infrared Detector Preset

[0031] Use the existing technology to collect images, and according to the collected images, preset the grayscale control parameters of the infrared detector until the average grayscale of the image is within the required range. The average grayscale is generally set between 60 and 100, such as 60, 80, 90, 100.

[0032] Step 2: Real-time detection

[0033] Collect infrared images in real time, judge the image point by point, and find out whether there are pixels exceeding the alarm gray threshold. The alarm gray threshold is generally set between 160 and 240. In this embodiment, the alarm gray threshold is 180-200. The real-time collection of infrared images refers to...

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Abstract

The invention belongs to the technical field of fire detection, and particularly relates to a fire detection method and a device for realizing the method. The invention aims to provide the fire detection method with high detection accuracy and large detection range and a device for realizing the method. The fire detection method comprises the steps of presetting an infrared detector, detecting in real time, and confirming warning. The device for realizing the fire detection method comprises a detection part, a control part and a transmission cable, and is characterized in that the detection part comprises an FLIR (forward looking infrared) imager, an optical lens and a cradle head. The method and the device provided by the invention have the following benefits: (1) the method utilizes the high-heat characteristic of fire source and directly presets the parameters of the infrared detector, and the detection accuracy is improved; (2) the effective fire detection distance is greatly prolonged; (3) infrared imaging and image analysis are adopted to improve the detection sensitivity; and (4) the stepwise detection method is adopted to improve the detection accuracy.

Description

technical field [0001] The invention belongs to the technical field of fire detection, and in particular relates to a fire detection method and a device for realizing it. Background technique [0002] Fire is one of the world's important disasters. Once it occurs, it will cause serious economic losses, directly affect industrial and agricultural production, and threaten the safety of life and property. Due to the characteristics of long-term latency, suddenness, randomness of disasters, and huge losses in a short period of time, fires have the characteristics of fire hazards. [0003] In order to realize the timely detection of fire, a large number of fire source detection devices have been applied, which can be divided into visible light image analysis detection and infrared analysis detection according to the detection method. Visible light image analysis uses the collected visible light images to analyze fire patterns. Since visible light images have little correlation w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B17/12G01J5/00
Inventor 刘国文张霞
Owner TIANJIN JINHANG INST OF TECH PHYSICS
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