【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成。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0%~4%范围内,系统最大相对误差小于1%。更多还原

【Abstract】 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%.更多还原