准连续调制激光吸收谱测量封闭室内O_2浓度的研究

Research on Closed Indoor Oxygen Concentration of Quasi-Continuous Laser Modulation Absorption Spectroscopy

在开采煤矿的生产活动中,遇到煤矿爆炸或地震、地质等自然灾害,会导致坍塌、掩埋、堆积等情形,进而形成复杂的封闭环境。如果发生人员被困等突发情况,破灾救援、挽救生命工作显得至关重要。封闭环境中O_2的浓度随时间的变化直接威胁到被困人员的生命安全,及时掌握被困人员所处环境的O_2浓度变化对破灾救援机器人作业实施有着非常重要的指导意义。为准确测量O_2的浓度,以封闭室内O_2为研究对象,综合应用可调谐二极管激光吸收光谱(TDLAS)技术和波长调制光谱(WMS)技术,设计了一套准连续调制激光吸收谱实验测量O_2浓度系统,对24 h封闭室内O_2的浓度随时间变化情况进行测量研究。实验结果表明,封闭室内O_2的浓度受到室内人员活动的影响,准连续调制激光吸收谱测量方法可以准确测量封闭室内的氧气变化。

Oxygen is the key material of metabolism of human body and the first need of human life activities.Explosion in coal mine production and natural disasters such as seismic hazards and geological hazards will lead to collapse,burying and accumulation,and then a complex enclosed environment will take shape.If there are signs of life in the enclosed enviro nment,the disaster relief work will be particularly important.In particular,the measurement of oxygen content and it’s concentration change with time in enclose d environment is of very important significance to the operation of the disaster rescue robot.Therefore,an experimental system for quasi-continuous modulat ion laser absorption spectroscopy measurement is established,whose research ob ject is closed in door oxygen.We measured the closed indoor oxygen concentratio n’s change during 24 hours based on tunable diode laser absorption spectroscopy(TDLAS)and wavelength modulation spectroscopy(WMS)The quasi continuous modulat ion laser absorption spectrum method can accurately measure the closed indoor ox ygen change.