基于金属氧化物传感器的温度控制加热电路  

Temperature Control Heating Circuit Based on Metal Oxide Sensor

作　　者：唐光大[1] 殷晨波[1] 徐海涵[1] 杨柳[1] 

机构地区：[1]南京工业大学车辆与工程机械研究所,江苏南京210009

出　　处：《仪表技术与传感器》2014年第5期4-6,34,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(50875122)

摘　　要：传感器所检测数据的可靠性受工作温度的影响,针对部分气体传感器工作温度不稳定,达不到标准要求,在共面式结构SnO2金属氧化物传感器的基础上提出了一种氢气传感器加热电路,基于TL494单闭环温度控制系统设计,提供5 V基准电压,采用Pt作为测温电阻和加热电阻材料,并采用了信号脉冲宽度模拟分析,使传感器能够稳定的工作在自身正常工作环境温度,提高了所检测数据的可靠性。The stability of the data detected by gas sensor will be affected of its working temperature. For some gas sensors with unstable temperature which is not up to standard requirements, this paper provides a heating circuit of hydrogen gas sensor based on planar type SnO2 metal oxide gas sensor. This kind of gas sensor is designed by TIA94 single - loop temperature control system,it supplies 5V reference voltage and uses Pt as the material of the measurement resistance and heating resistance. And using the simulation analysis of the signal pulse width in order to make the gas sensor work in its normal working temperature, which improves the reliability of the date detected.

关 键 词：金属氧化物传感器 共面式结构 TL494 单闭环温度控制 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]