气象用温度传感器检定结果的测量不确定度评定与应用

Evaluation and Application of Measurement Uncertainty of Calibration Results of Temperature Sensors for Meteorological Applications

基于二等铂电阻温度计标准装置,以气象用铂电阻温度传感器为例,详细介绍了温度传感器检定结果的测量不确定度评定方法。通过建立温度传感器的测量模型,分析了测量不确定度来源,展示了各测量不确定度分量的评定过程。结果表明:采用二等铂电阻温度计标准装置检定时,温度传感器检定结果的扩展不确定度U=0.03(k=2)。各不确定度分量中,恒温槽波动性引入的标准不确定度为0.012℃,电阻测量仪器引入的标准不确定度分量为0.010℃,计量标准器引入的标准不确定度为0.004℃。

Measurement uncertainty is one of the important indexes to evaluate the quality of measurement.Based on the standard device of second-class platinum resistance thermometer,this paper takes the platinum resistance temperature sensor for meteorological application as an example,and introduces in detail the evaluation method of the measurement uncertainty of the verification results of the temperature sensor.By establishing the measurement model of temperature sensor,the source of measurement uncertainty is analyzed,and the evaluation process of each measurement uncertainty component is shown.The results show that the extended uncertainty of the verification results of temperature sensor is u=0.03(k=2) when calibrated with the second-class platinum resistance thermometer standard device.Among the uncertainty components,the standard uncertainty introduced by the fluctuation of the constant temperature tank is 0.012 ℃,the standard uncertainty component introduced by the resistance measuring instrument is 0.010 ℃,and the standard uncertainty introduced by the measuring standard is 0.004 ℃.