红外甲烷气体浓度检测系统设计  

Design of infrared methane gas concentration detection system

作　　者：朱红秀[1] 孙连昆 王忠华[1] 聂哲[1] 刘欢[1] 

机构地区：[1]中国矿业大学机电与信息工程学院,北京100083

出　　处：《应用光学》2014年第5期890-894,共5页Journal of Applied Optics

基　　金：国家高技术研究发展计划(863计划)资助项目(2008AA062201)

摘　　要：为了精确测量甲烷气体的体积浓度，采用平行红外光源IRL715EN-PR设计了红外甲烷气体检测系统。整个检测系统由硬件电路和软件系统组戍。在软件程序设计上设计了一种关于信号处理的新算法，同时设计了中断喂狗程序，大大延长了看门狗定时复位时间。利用Matlab对数据进行了拟合，得到了系统的浓度和电压的函数关系。实验表明，在体积浓度在O％～4％范围内，系统最大相对误差小于1％。In order to accurately measure the volume of methane gas concentration,we adopted the parallel infrared illuminant,IRL715EN-PR,to design an infrared methane gas detection system.The whole detection system consisted of hardware circuit and software system.We put forward and implemented a new algorithm about signal processing.At the same time,a feeding dog in interrupt service routine(ISR)program was designed so as to greatly extend the watchdog timer reset time.Using Matlab for data fitting,we achieved a function of concentration and voltage of the system.Experiments show that the volume concentration is in the range from 0%to 4%,the greatest relative error of the system is less than 1%.

关 键 词：红外甲烷气体检测系统 模拟信号调理电路 单片机 看门狗 数据拟合 

分 类 号：TN219[电子电信—物理电子学]