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Aircraft electrical fire early warning method

An electrical fire and aircraft technology, applied in the field of aircraft, can solve problems such as insufficient time, aviation accidents, and missed reports, and achieve the effect of preventing false alarms and reducing aviation accidents.

Active Publication Date: 2022-01-18
NORTHWESTERN POLYTECHNICAL UNIV
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AI Technical Summary

Problems solved by technology

When the fire produces smoke and the air temperature rises, the fire has already formed initially. The time for the emergency landing of the aircraft is insufficient, resulting in aviation accidents, and these fire detection systems have certain defects. It has the disadvantages of false positives and false negatives in the case of smog crisis

Method used

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specific Embodiment

[0045] Using pyrolysis gas chromatography-mass spectrometry (PY-GC-MS) to determine the volatile gas composition of the early pyrolysis of the aviation wire at different temperatures, the pyrolysis volatile gas composition analysis test flow chart is as follows figure 1 shown. Take a small amount of polytetrafluoroethylene wire insulation layer and put it into a cracker filled with nitrogen. At the set temperature, it will be rapidly pyrolyzed into cracked products characterized by high polymers. separation in the column. The separated components are detected by the detector, and then the obtained signal is amplified, and processed by the recorder and the microprocessor to draw the cleavage chromatogram, such as figure 2 It is the pyrolysis chromatogram at 300 degrees Celsius. It is compared with the known spectrum for identification and analysis. At this temperature, the pyrolysis gas contains 2% 1-fluorononane and other gases. Using the same method at different temperature...

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Abstract

The invention discloses an aircraft electrical fire early warning method, which comprises the following steps of: detecting early pyrolysis volatile gas components of an aviation conductor, analyzing and selecting index gas in the pyrolysis gas components, selecting an optimal sensor for detecting the index gas, and designing a reasonable fire early warning device. According to the novel fire early warning method provided by the invention, when the electrical fire of the aircraft is not formed, indicator gas is detected, fire hazards are found, early warning and early warning are carried out on the fire, operation time is provided for the aircraft to take forced landing measures, or preventive maintenance is carried out, and aircraft accidents are reduced.

Description

technical field [0001] The invention belongs to the technical field of aircraft, and in particular relates to an electrical fire early warning method. Background technique [0002] With the development of aircraft technology and the application of multi- and all-electric aircraft technology, the number of electronic equipment on aircraft is gradually increasing, and the number of cables is also increasing. , the length of the cable in the aircraft has reached 500km. The aircraft cable is the channel for transmitting electric energy and signals, providing guarantee for the control and information communication between various systems. The increase of cables will increase the probability of aircraft electrical fires. It will lead to the interruption of power supply and information transmission in the cabin, resulting in power failure of electrical equipment, affecting flight safety, and the heat and poisonous gas generated by the burning of cables will affect the life safety o...

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Application Information

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IPC IPC(8): G08B17/10G01N30/02G01N30/06G01N30/86
CPCG08B17/10G01N30/02G01N30/06G01N30/8675
Inventor 张晓斌张航姚文利高欢欢
Owner NORTHWESTERN POLYTECHNICAL UNIV
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