摘要
目前常用火灾检测方法对早期森林火灾检测有很大的不足。针对早期森林火灾检测的不足,提出采用TDLAS(可调谐激光二极管吸收光谱)技术检测森林早期火灾的方法。TDLAS技术对痕量气体的检测灵敏度高、响应速度快。采用该技术自行搭建了一套早期森林火灾特征气体检测系统。通过分析不同浓度CO气体的二次谐波信号发现,CO浓度与二次谐波强度之间存在良好的线性关系,且系统具有较高的精度。根据实验结果发现,通过测量CO浓度来实现早期森林火灾是可行的,可以很大程度上改善森林火灾探测系统的性能。
The commonly used forest fire detection methods are insufficient in detecting the early-stage forest fire. To cover this shortage, this paper tried a new method to detect early-stage forest fire by using Tunable Diode Laser Absorption Spectroscopy （TDLAS） technique. Due to the high sensitivity and rapid response, TDLAS can be used to detect and trace the characteristic of gas. In this paper, a new system was constructed to detect early-stage forest fire. Through the analysis of second-harmonic spectrum for different CO concentrations, it can be seen that there is a good linear relationship between CO concentration and spectrum intensity and the system has good accuracy. The experiment demonstrated that it is feasible to detect early-stage forest fire by measuring CO concentration, which can greatly help improve the performance of the forest fire detection system.
出处
《森林工程》
2013年第2期139-142,共4页
Forest Engineering
基金
国家林业局948项目(2013-4-58)
中央高校基本科研业务费专项资金项目(DL12DB03)
