【摘要】 研究并设计了一种新型智能气敏传感器.简要介绍了TiO2气敏元件及气敏机理.将拥有ARM7内核的LPC2131微处理器做为主控制器,实时监测电源电压,实现对温度准确控制,同时测量气敏薄膜的电阻,经元件阻值和气体浓度的校准后,显示被测气体浓度,同时提供一个友好的用户界面,并具备报警功能,实现了气敏传感器智能化,具有动态测量范围大(1~500MΩ),精确度高(精确度优于0.5%),功耗低、体积小、成本低、可重复利用等特点.更多还原

【Abstract】 A kind of new intelligent gas sensor was designed and investigated. We used the LPC2131 as the microcontroller to control the power’s voltage instantly and the gas sensor’s working temperatures and to measure the thin film’s resistance. After the calibration of the gas concentration and component’s resistance, we display the tested gas concentration and intelligentize the gas sensor by providing a friendly user’s interface with an alarming function. This intelligent sensor ias a wide dynamic testing range (1~500 MΩ)and high precision(0.5% at least), low consumption, low cost ,small volume and good reproducibility.更多还原