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Hydrogen flame detection method and device

A detection method and detection device technology, applied in the field of detection and analysis, can solve the problems of no interference source, anti-false alarm ability, insufficient precision, poor anti-interference ability, etc., to enhance the anti-false alarm ability, accurate quality assurance, and reduce fire errors the effect of

Inactive Publication Date: 2021-10-29
无锡格林通安全装备有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Traditional hydrogen flame detectors only use single-infrared or single-ultraviolet signals. Both signal feature extraction methods have their limitations, resulting in short detection distance and poor anti-interference ability.
However, in some flame detectors that combine ultraviolet and infrared, the combination of threshold method and red-ultraviolet fusion strategy cannot give full play to the advantages of red-ultraviolet flame detection.
In addition, the alarm sensitivity of similar detectors is low, the accuracy is not enough, and there is no ability to resist false alarms for various interference sources

Method used

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  • Hydrogen flame detection method and device

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Experimental program
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Effect test

Embodiment 1

[0035] Embodiment one refers to figure 1 , a hydrogen flame detection device, comprising an infrared sensor (1), an ultraviolet sensor (2), an amplifier circuit (3), an A / D sampling chip (4), a single-chip microcomputer (5); the single-chip microcomputer (5) includes a digital filter module ( 51), Fourier transform module (52), infrared normalization module (53), artificial neural network model (54), ultraviolet pulse number density calculation module (55), ultraviolet normalization module (56), infrared sensor (1) After the signal has realized signal amplification and analog-to-digital conversion through the amplifier circuit (3), the A / D sampling chip (4) successively, it passes through the digital filter module (51) and the Fourier transform module ( 52) feature extraction, infrared normalization module (53) normalization processing; the ultraviolet sensor (2) is normalized by the ultraviolet pulse number density calculation module (55) and the ultraviolet normalization mod...

Embodiment 2

[0036] Embodiment two refers to Figure 2-3 , a hydrogen flame detection method, using the hydrogen flame detection device in Embodiment 1, proceeds according to the following steps:

[0037] Step 1 is to obtain samples: the obtained offline samples are as complete as possible, including various types of interference samples modulated by frequency, to form a flame sample set; select the ultraviolet sensor (2) and the three-channel infrared sensor (1), and obtain the embodiment through the modbus bus The real-time data of the hydrogen flame detection device in No. 1 is saved; the central wavelength of the filter of the three-channel infrared sensor (1) is selected as 2.95um, 3.8um, and 5.0um; the flame sample set includes hydrogen flames at different distances and angles , interference samples include sunlight, artificial heat sources at different distances and modulation frequencies.

[0038] The second step is to expand the flame sample set: due to the principle of the pyroe...

Embodiment 3

[0044] The third embodiment is basically the same as the second embodiment, the difference is that the continuous alarm strategy design is added, see Figure 4 , that is, the model is considered to be on fire when it reports fire several times in a row. Here, a threshold of consecutive times needs to be set. Since the model is called once every second, assuming that a fire occurs in 0 seconds, when the threshold is 3, the 4th and 5th seconds of the present invention The hydrogen flame detection device reports a fire alarm, that is, the theoretical alarm delay of the hydrogen flame detection device within the effective range is about 4 seconds.

[0045] The actual use effect of the present invention refers to Figure 5-7 .

[0046] like Figure 5 For the simulation test effect table of the trained model, cross-validation is adopted, and the test set does not participate in the model training. It can be seen from the table that when the threshold of consecutive times reaches ...

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Abstract

The invention discloses a hydrogen flame detection method and device. The method comprises the steps of obtaining a sample, expanding a flame sample set, selecting an ultraviolet sensor and a three-channel infrared sensor for feature extraction and normalization, designing an algorithm model and testing. The device comprises an infrared sensor, an ultraviolet sensor, an amplifying circuit, an A / D sampling chip and a single-chip microcomputer, wherein the single-chip microcomputer realizes digital filtering, feature extraction and normalization. The problems that a traditional hydrogen flame detector is short in detection distance and low in anti-interference capacity are solved, and the advantages of the red and ultraviolet flame detection technology are well played. In addition, the detection device is high in alarm sensitivity and high in precision, and the false alarm resistance to various interference sources is enhanced.

Description

technical field [0001] The invention belongs to the field of detection and analysis, in particular to the field of fire detection, in particular to a hydrogen flame detection method and device. Background technique [0002] Hydrogen, as a highly clean and environmentally friendly renewable energy, has attracted worldwide attention. Among them, hydrogen fuel-related industries are developing rapidly. However, hydrogen is flammable and explosive, has a large diffusion coefficient and low ignition energy, and there are certain risks of leakage, fire and explosion during use. With the promotion of hydrogen energy, the demand for hydrogen energy fire detectors has become a research hotspot in this field. [0003] At the beginning of the fire, the flame combustion shows a unique feature, that is, the flame contains ultraviolet rays and infrared rays of different wavelengths that cannot be distinguished by the naked eye. Traditional hydrogen flame detectors only use single infra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/10G06N3/04G06N3/08
CPCG08B17/10G06N3/04G06N3/08
Inventor 章军杨伟伟郭晶周水淼曹志兵
Owner 无锡格林通安全装备有限公司
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