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Satellite fire point distinguishing method for electric transmission line forest fire based on dynamic threshold

A transmission line and dynamic threshold technology, applied in character and pattern recognition, instruments, computer components, etc., can solve the problems of misjudgment of fire point, susceptibility to seasonal changes and surface temperature changes, etc., to reduce losses and improve recognition accuracy , The effect of eliminating the influence of fire point identification

Active Publication Date: 2015-03-18
STATE GRID CORP OF CHINA +2
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  • Summary
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  • Description
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Problems solved by technology

) series satellites are generally judged as a fire point when the 21st channel is greater than a certain absolute threshold. This method has the following defects: (1) easily affected by clouds, bare land and water surface, resulting in misjudgment of the fire point; (2) easy Affected by seasonal changes and surface temperature changes, it leads to misjudgment of fire points; (3) easily affected by the urban heat island effect, resulting in misjudgment of fire points

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Receive MODIS infrared satellite data: set MODIS infrared satellite receiving device, use the device to receive monitoring data of MODIS infrared satellite;

[0019] (2), generate three-channel composite picture: the 7th channel of the MODIS infrared satellite that step (1) receives, the 2nd channel is given green, the 1st channel is given blue, using conventional method, will be given red 7th channel and Give the second channel of green and the first channel of blue to generate a three-channel color composite picture;

[0020] (3) Qualitative identification of fire points of open flames: On the three-channel synthetic image generated in step (2), find all red pixels that represent the fire points of open flames that are burning. Use the conventional method to calculate the minimum value T of the 21st channel value of all red pixels 0 ;

[0021] (4), Quantitative identification of fire point by dynamic threshold method: use the dynamic minimum value T obtained in ...

Embodiment 2

[0026] Steps (1)~(3) are with embodiment 1;

[0027] (4), Quantitative identification of fire point by dynamic threshold method: use the dynamic minimum value T obtained in step (3) 0 As the dynamic threshold value discrimination step (3) of the 21st channel, the red bright spots displayed on the three-channel composite picture are not open flames. This is the end of the steps.

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Abstract

The invention discloses an electric transmission line forest fire satellite fire point distinguishing method based on a dynamic threshold. The method comprises the following steps of receiving MODIS infrared satellite data, generating a three-channel composite picture, determining and distinguishing open flame fire points, determining and distinguishing fire points through a dynamic threshold method, removing industrial and urban fire point information, removing fire point information beyond a 5km distance range of an electric transmission line, and obtaining forest fire point information of the electric transmission line. The method eliminates side effects on fire point recognition in different seasons and different moments, eliminates effects of different areas on the fire point recognition, improves the accuracy of the fire point recognition of the electric transmission line, can timely publish electric transmission line forest fire alarm information to enable people to take measures in advance and reduces the power grid loss caused by forest fire to the maximum limit.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and relates to a dynamic threshold-based method for identifying fire points of mountain fire satellites in transmission lines, which is suitable for automatic, fast and accurate identification of mountain fires near transmission lines. Background technique [0002] In recent years, with global warming, extreme weather has occurred frequently, and the central and southern regions of my country are more and more prone to continuous high temperature and sunny weather during spring plowing and Qingming period. At the same time, due to economic development, rural fuels are replaced by traditional hay and trees for gas, and with the implementation of the policy of returning farmland to forests, the vegetation in mountainous areas is becoming more and more intact. Therefore, the number of wildfires near transmission lines is increasing rapidly. The number of trips due to wildfires has als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/46
Inventor 陆佳政徐勋建张红先李波方针赵纯
Owner STATE GRID CORP OF CHINA
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