摘要
氧化锡气体传感器吸附可燃性气体可使其电导率发生变化,这种电导率的变化以输出电压的形式取样,就可检测出探测气体的类型和浓度。采用TGS813气体传感器,利用自制的气体浓度配制器得到不同浓度的不同气体,将传感器闭封于待测气体中由测试电路得到感器的响应特性和温度特性。依据传感器的响应特性设计合适的传感器调理电路,应用高性能单片机P89LPC938实现对可燃性气体浓度的测量和温度显示。
Tin dioxide gas sensor is widely used in detecting gas concentration by its electric conductivity change when exposed to flammable gases. The gas sensor can absorbed combustible gases and induced the surface resistivity fall of material. The conductivity change of the sensor can be outputted by the voltage of testing circuit. In this paper, concentration of gases is obtained by a recording meter and the gas sensor is airproof in a vessel . Based on the property of TGS813 and its sensitivity to temperature, A gasmetry instrument for combustible gas is designed for mesureing gas concentration and temperature via microcontroller system P89LPC938.
出处
《东华理工学院学报》
2007年第3期257-260,共4页
Journal of East China Institute of Technology
基金
东华理工学院硕士基金项目(DHS0418)
