摘要
载人航天器是一个密闭的环境,密封舱内有各种复合材料结构和设备,材料和设备都会释放出微量的有害气体,它会对航天员的健康带来威胁,为保证航天员的健康,要控制舱内有害气体含量在人体可接收安全线以下;要控制浓度首先要检测出有害气体浓度,密封舱有害气体种类多,采用多传感器分别测不同的气体,过多重量和功耗对于航天器是不可接收的,利用空心光纤吸收光谱法实现了有害气体检测原理和设计实现的系统,并经过了在轨飞行验证,具有检测气体数量多,灵敏度高,可实时检测的特点。
There is an airtight environment in pressurized manned spacecraft, a few toxic gases may release which could create a hazard-ous situation for the crew. All flight hardware shall meet the toxicity offgassing acceptance requirement which is necessary for crew health. In order to control it under the maximum values. To detect toxic gases respectively with different sensors is accept hardly due to the notable cost of flight weight and power. Here a method called fiber optical absorption spectroscopy is introduced. This method could detect several toxic gases with only one facility and has been proved to be available for detection of toxicity offgassing on orbit.
出处
《计算机测量与控制》
北大核心
2013年第4期980-982,共3页
Computer Measurement &Control
基金
国家重大科技专项工程
关键词
气体检测装置
近红外
吸收光谱
空心光纤
空间遥感
Gas detection deviee
Near-infrared
Absorption spectrum
Hollow core crystal fiber
Spatial remote sensing
