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A Detection Method of Canopy Fire and Ground Fire Based on Noise Spectrum Analysis

A noise spectrum and detection method technology, applied in the field of sound spectrum recognition, can solve the problems of difficult disaster relief process and low efficiency of forest fire disaster relief

Active Publication Date: 2021-01-12
NANJING FORESTRY UNIV
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Problems solved by technology

Due to the wide range of forest fires, there are certain difficulties in the disaster relief process, and only when the firefighters arrive at the fire scene, can they know the specific fire targets. Therefore, the existing fire fighting efficiency in dealing with forest fires is not high.

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  • A Detection Method of Canopy Fire and Ground Fire Based on Noise Spectrum Analysis
  • A Detection Method of Canopy Fire and Ground Fire Based on Noise Spectrum Analysis
  • A Detection Method of Canopy Fire and Ground Fire Based on Noise Spectrum Analysis

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] After analyzing the noise power spectrum of forest fires, the noise spectrum of surface fires can be modeled as red noise (the amplitude of the trend line gradually increases towards the low frequency direction), while the trend line of the noise spectrum of tree crown fires has an approximate bell shape (Gaussian). The noise frequency range of crown fires is relatively small, ranging from 250-450 Hz. The different trendlines of the forest fire noise power spectrum are parameters that can be used to determine the type of forest fire in wireless sensor networks.

[0035] Based on this difference, the present invention designs a crown fire and ground fire detection method based on noise spectrum analysis, analyzes the fire combustion noise collected in real time, and realizes the detection of tree crown fire and gro...

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Abstract

The invention relates to a method for detecting crown fire and ground fire based on noise spectrum analysis. Based on the difference between the frequency spectrums corresponding to different fire sounds, that is, the amplitude of the trend line of the noise spectrum of ground fire gradually increases towards the low frequency direction, while the amplitude of the crown fire The noise spectrum trend line has an approximate bell shape. Based on this, the fire combustion noise collected in real time is collected and the spectrum is analyzed. Through the trend of different spectrum trend lines, the detection of crown fire and ground fire can be accurately realized.

Description

technical field [0001] The invention relates to a tree crown fire and ground fire detection method based on noise spectrum analysis, and belongs to the technical field of sound spectrum identification. Background technique [0002] Forest fire refers to the behavior of forest fire that loses human control, spreads and expands freely in forest land, and brings certain harm and loss to forests, forest ecosystems and human beings. Forest fire is a natural disaster that is sudden, destructive, and difficult to deal with. Due to the wide range of forest fires, there are certain difficulties in the disaster relief process, and only when the firefighters arrive at the fire scene can they know the specific fire targets. Therefore, the existing fire fighting efficiency in dealing with forest fires is not high. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for detecting crown fire and ground fire based on noise...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H11/06G01K13/00G08B17/00
CPCG08B17/005G01H11/06G01K13/00
Inventor 高德民张朔
Owner NANJING FORESTRY UNIV