摘要
环境温度的改变和传感器工作温度的漂移严重影响了SnO2类传感器的检测精度、稳定性以及重复性。采用数字PI算法,通过控制SnO2传感器内部加热电阻的功率,使传感器工作在稳定的绝对温度下,从而抑制了温度变化对传感器的干扰,提高了该类传感器的工作稳定性。通过对含有CH4气体检测的大量实验表明:该方法完全能够抑制环境温度变化对传感器的干扰,提高传感器性能。
The change of environment temperature and the variable of the sensor＇s working temperature take great effect on the detecting precision, the stability and repetition of SnO2 serial sensors. By controlling the power of internal heating resister with digital PI arithmetic, the sensors work at an invariable temperature, the temperature interfere can be restrained and stability of the sensors can be improved. The experiment results of the detecting gas CH4 with show the methods can utterly keep the sensors from temperature interfere and enhance the sensor＇s stability.
出处
《传感器与微系统》
CSCD
北大核心
2006年第7期30-32,共3页
Transducer and Microsystem Technologies
关键词
气体传感器
加热电阻
PI控制
温度干扰
gas sensors
heating resistance
PI control
temperature interfere
