The widely used non-metallic materials and a large number of electrical equipment in manned spacecraft lead to the potential danger of fire in spacecraft. It is very important to carry out the research of fire early warning technology in manned spacecraft for implementation of spacecraft missions. The high sensitivity detection of CO, HCL, HCN and other early fire characteristic gases are realized based on photoacoustic spectroscopy technology in this paper. Combined with photoacoustic spectrum gas detection technology with high sensitivity and low detection limit, and laser scattering smoke detection technology, an cabin fire early warning system for manned spacecraft is designed and implemented. For the special case of on-orbit microgravity air convection, active sampling is used to shorten the response time. Finally, through the real airtight cabin test, the detection time of the proposed method is about 30s ahead of that of the ordinary sensor, which realizes early perception and early prediction, and verifies the correctness and effectiveness of the proposed method.
Research on Intra-Vehicular Fire Early Warning Technology Based on Manned Spacecraft
28.07.2024
882247 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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