摘要
为了补偿热敏电阻的动态测量误差,可在传感器的输出端串接一个动态补偿环节。该环节本质上是一个带通或高通滤波器,补偿环节的增加将引起严重的噪声放大,影响测量系统的精度。研究了在噪声环境下,改善热敏电阻传感器的动态特性的方法,该方法在采用实验数据得到补偿环节系数的同时,采用多项式预测滤波和中值滤波相结合的方法减小测量系统的噪声。仿真实验验证了该方法的有效性。
In order to compensating thermistor dynamic measurement error, a dynamic compensation block is employed. The block is a band-pass filter or a high-pass filter in essence, thereby the block causes severe noise amplification, and the accuracy of measurement system is infected. The thermistor dynamic measurement error compensating with reducing noise disturbance is studied. The coefficient of the block is obtained via experimental data, at the same time a method that combines polynomial prediction filter and median filter for the noise attenuation is introduced. The simulation results show that the dynamic compensation method is valid.
出处
《计量学报》
EI
CSCD
北大核心
2005年第2期111-114,共4页
Acta Metrologica Sinica
基金
国家自然科学基金(60202012)
关键词
计量学
热敏电阻
动态测量误差
噪声
补偿
Metrology
Thermistor
Dynamic measurement error
Noise
Compensation
