Fire identification algorithm based on fast Fourier transform

A technology of Fourier transform and recognition algorithm, which is applied in the field of fire recognition algorithm based on fast Fourier transform, can solve problems such as misjudgment, achieve high accuracy, improve feature recognition rate, and improve accuracy

Pending Publication Date: 2020-04-07
西安中核核仪器股份有限公司
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Problems solved by technology

However, in some occasions with fixed infrared energy radiation (such as large transformers and other occasions with infrared radiation energy), if only ...

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  • Fire identification algorithm based on fast Fourier transform
  • Fire identification algorithm based on fast Fourier transform
  • Fire identification algorithm based on fast Fourier transform

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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the following in conjunction with the attached figure 1 , attached figure 2 , attached image 3 , attached Figure 4 , attached Figure 5 And attached Image 6 And embodiment, the present invention is described in further detail. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] refer to figure 1 , the implementation process of a fire identification algorithm based on fast Fourier transform:

[0026] S1: Set the sensor to collect flame flicker frequency and infrared radiation, and obtain analog signals of flame flicker and infrared radiation;

[0027] S2: The collected flame analog signal is processed through the amplification gain circuit (2) to realize the amplification of the collected signal, obtain the continuous data value x(n) in the time domain of t...

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Abstract

The invention discloses a fire identification algorithm based on fast Fourier transform. The spectral distribution condition of the flame radiation light is different from the spectral distribution of sunlight and other external irradiation light sources. When a fire rages, an algorithm is combined with a signal acquisition principle of an existing infrared pyroelectric sensor. Deep analysis offrequency domain characteristics and time domain infrared radiation energy is carried out on spectrums of all wave bands through fast Fourier transform, the flame recognition rate and the fire detection precision can be greatly improved, and therefore the phenomena of missed alarm and false alarm are reduced. According to the flame identification algorithm, data analysis of frequency domain characteristics is carried out on flame through fast Fourier transform. The accumulative analysis and calculation are carried out for data value in the frequency domain of specific frequency to acquire frequency amplitude and phase of different sine wave signals.. The flame recognition accuracy in a normal environment can be improved, the invention has higher accuracy in a part of occasions with fixed infrared radiation, and flame is analyzed from flame time domain energy.

Description

technical field [0001] The invention relates to the technical field of flame identification and detection, in particular to a fire identification algorithm based on fast Fourier transform. Background technique [0002] At present, most domestic fire identification algorithms based on single-chip microcomputers use threshold analysis, correlation analysis, decision tree algorithm, fuzzy algorithm and so on. This type of algorithm performs data analysis in the time domain on the infrared radiation energy generated by the flame in space when a fire occurs. This analysis method is simple, convenient and easy to implement. However, in some occasions with fixed infrared energy radiation (such as large transformers and other occasions with infrared radiation energy), if only detecting infrared radiation energy in the time domain for data analysis, it is easy to occur in some occasions with high temperature and high heat Misjudgment. Therefore, there is a lack of a fire identifica...

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Application Information

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IPC IPC(8): G06K9/00G06F17/14
CPCG06F17/142G06F2218/00
Inventor 王奔成震
Owner 西安中核核仪器股份有限公司
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