A co-based 2 Aircraft fire detection device and method for gas concentration monitoring

Abstract

The invention provides an aircraft fire alarm detection device and method based on CO2 gas concentration monitoring. A dual-wavelength infrared monitoring principle and a diffusion type structure are adopted, based on the continuous monitoring of the concentration of CO2 gas of an aircraft in flight in a low-temperature low-pressure environment, the fire alarm detection of an aircraft is carried out; the detection device and method have the advantages of capability of being adaptive to a low-temperature low-pressure atmospheric environment, heating, preserving heat, monitoring continuously online in a constant-temperature state, rapid response, high reliability, excellent waterproof and dustproof performances, no need of using an air pump, and the like, and can be widely applied to aircraft fire alarm detection systems. A dual-channel infrared detector is adopted for eliminating interferences caused by factors of light source instability and the like; a light reflection lens is adopted for lengthening the absorption length of infrared light; a heating element and a heat preservation material are adopted for reinforcing the environment adaptability; a conical light concentrator is adopted for increasing the received light intensity and compensating and correcting the temperature and air pressure automatically, so that the aircraft fire alarm detection reliability is improved effectively. The device and the method guarantee the rapidness and accuracy of aircraft fire disaster alarming.

Description

technical field [0001] The invention belongs to the field of aircraft fire detection, and specifically relates to the use of dual-wavelength infrared monitoring principles to 2 The gas is the fire detection parameter, adopts diffusion structure, has heating and heat preservation measures, automatic temperature and air pressure compensation program, and is an aircraft fire detection device and method with digital signal output. Background technique [0002] As a special form of fire, aircraft fires are characterized by indistinct fire features, difficulty in fighting fires, violent fires, difficulties in evacuation, and a large number of fatalities at one time. Once a fire breaks out in an aircraft, especially when it is flying at high altitude, it is very likely to lead to serious consequences of aircraft crash, causing heavy economic losses and casualties, and may even cause social panic. Therefore, the application of high-reliability aircraft fire detection technology is ...

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Problems solved by technology

[0003] Among the traditional fire detectors, smoke detectors, heat detectors and flame detectors are difficult to identify early fires, and the false alarm rate is high

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