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可调谐半导体激光吸收光谱技术用于火灾探测――初步试验

, PP. 56-61

Keywords: 可调谐激光,火灾探测,光谱,特征气体

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Abstract:

以火灾燃烧过程中产生的气体作为参数,可以大大提高火灾探测的早期性.测量气体浓度的方法有很多,可调谐半导体激光吸收光变更技术(tunablediodelaserabsorptionspectroscopy,TD-LAS)由于其高选择性、高灵敏度和高分辨率的特点而越来越受到重视.描述了火灾特征气体CO和CO2的选取,设计了一套基于TDLAS原理的火灾探测系统,通过扣除背景噪声谱线以及对激光强度信号进行拟合,可以提高火灾探测的有效性.验证了系统对CO和CO2能够很好响应并且具有较好的线性关系,系统长时间运行稳定可靠,能够满足火灾探测的要求.

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