基于大型复合低压舱的模拟海拔高度系统研制

Development of Altitude Simulation System Based on Large Low-pressure Chamber

目的：模拟在各种海拔高度和不同人员参加实验的情况下,确保舱内压力和空气成分比例与对应的自然条件一致。方法：由监测系统采集各种海拔高度的压力、氧分压（p（O2））和二氧化碳分压（p（CO2））数据,送到控制系统中与已知自然条件对应的数据进行比较,输出差模信号以驱动真空系统和新风系统。结果：经测试,舱内模拟高度与实际值相差在±10 m以内,舱内CO2体积分数〈0.5%,氧分压在19.8~5.47 kPa,符合低压舱模拟海拔高度系统的设计要求。结论：该大型复合低压舱作为西北地区部队平战条件下卫勤保障研究的新型实验平台,具有广泛的应用前景。

Objective To ensure inner-chamber pressure and air composition proportion consistent with corresponding natural conditions through scenario simulation of various altitudes and different participators involved in experiment.Methods Collected by monitor system,the parameters of pressure,p（O2） and p（CO2） under various altitudes were compared with the data corresponding to natural conditions ever known in control system.In consequence,the output of different-mode signal would drive vacuum system and air replenishment system.Results The deviation between inner-chamber simulated altitude and actual value was within ±10 m through testing with CO2 concentration less than 0.5% and p（O2） at 19.8~5.47 kPa.The result met the design requirement of altitude simulation system based on low pressure chamber.Conclusion The future application prospect of this large low-pressure chamber is promising as a new experimental platform in medical and logistical support research for troops stationed in northern-west both at peacetime and wartime.