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准连续信号是一种重要的调制信号形式,在多个领域有广泛应用。准连续调制激光吸收谱是准连续信号典型应用之一,具有响应迅速、检测精度高、检测限低的特点。在地震、塌方、火灾等灾害环境下,由于堆积形成复杂封闭环境或燃烧不充分有可能产生极易燃爆的CO有毒有害气体。因此,灾害现场破拆机器人进行救援时,需要对现场的气体环境进行监测和分析,避免造成二次爆炸伤害。本系统对CO气体展开研究,采用准连续调制激光吸收谱技术,搭建测量实验系统,实施了改变浓度、压力和温度条件的CO测量实验,得出了准连续调制激光吸收谱2f信号幅值与CO浓度、实际测量时的压力、温度的关系模型。这些关系模型可使破拆机器人在灾害现场根据测量系统实际测得的压力和温度值对CO气体的浓度进行相应的压力以及温度补偿。
Quasi-continuous signal is an important form of modulation signal, has been widely used in many fields. Quasi-continuous modulation of the laser absorption spectrum is a typical application of quasi-continuous signal, with rapid response, high detection accuracy, low detection limit. In the earthquake, landslides, fire and other disaster environments, due to the accumulation of complex closed environment or incomplete combustion may produce extremely explosive CO poisonous gases. Therefore, when rescue robots are dismantled at the disaster site, the gas environment in the site needs to be monitored and analyzed to avoid secondary explosion damage. The system of CO gas research, the use of quasi-continuous modulation laser absorption spectroscopy technology to build a measurement system, the implementation of a change in concentration, pressure and temperature conditions of the CO measurement experiment, obtained quasi-continuous modulated laser absorption spectrum 2f signal amplitude and CO concentration, the actual measurement of pressure, temperature relationship model. These relational models enable the robot to make corresponding pressure and temperature compensation on the concentration of CO gas according to the actual measured pressure and temperature values of the measurement system at the disaster site.