Composite detection technology based aspirated aircraft cargo space fire detection device

Abstract

The invention discloses a composite detection technology based aspirated aircraft cargo space fire detection device. The composite detection technology based aspirated aircraft cargo space fire detection device is characterized in that the sampling opening is connected with a heating device, a wet filter device, a smoke light-transmission detection device, a filter device, a CO (Carbonic Oxide) concentration detection device, a sampling pump and an exhaust device through a sampling pipe in turn; a temperature sensor is arranged in the sampling opening; a sampling opening protective cover is arranged under the sampling opening in the aircraft cargo space; the smoke light-transmission detection device is provided with a detection optical path which is formed by a semiconductor laser and a silicon photocell and the smoke detection is achieved through the measurement of the light transmission of smoke; an infrared absorption principle based sensor is selected by the CO detection device; whether a fire occurs or not is judged through a bayesian network fire detection algorithm according to the measured temperature, light transmission of smoke and CO concentration; the bayesian network fire detection algorithm needs to be trained through cargo space fire experiment data. According to the composite detection technology based aspirated aircraft cargo space fire detection device, the aircraft cargo space fire detection can be performed, the sensitivity is high, and the false alarm rate is low.

Description

technical field [0001] The invention belongs to the technical field of fire detection, and in particular relates to an air-breathing aircraft fire detection device based on composite detection technology. Background technique [0002] At present, most of the fire detectors used in the aircraft cargo compartment are passive fire detectors, that is, the fire smoke must move to the vicinity of the detector sensor, so that the detector can identify the fire and give an alarm. The accumulation of cargo in the aircraft cargo compartment is complex and changeable, and the movement of fire smoke will change with the accumulation of cargo. After a fire occurs inside the cargo, the fire smoke may not be able to quickly rise to the location where the fire detector is installed, and thus the fire detection cannot be realized quickly. [0003] The historical data of false fire alarms in aircraft cargo compartments show that due to turbulence and vibration, a large number of fire interfe...

AI Technical Summary

Problems solved by technology

The application did not give a clear introduction to the application of the system in the aircraft cargo hold, and did not consider the impact of the special environment in the application of the aircraft cargo hold on the detection components, and the PPN network algorithm used in the application is relatively complicated, which is not conducive to engineering technology Personnel operation

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