风向现场校准三点测量不确定度分析

Uncertainty Analysis of Three-Point Measurement of Wind Direction in Field Calibration

基于风向传感器的静态三点校准方法,介绍自动气象站风向传感器校准结果的测量不确定度评定,目的是为保证风向传感器观测数据的准确、可靠和可信。依据《自动气象站风向现场校准方法》和JJF1059.1—2012《测量不确定度评定与表示》的要求,对风向的3个校准点分别设计10次重复试验,采用合并样本标准偏差的方法,进行A类不确定度评定。并分析校准过程中的B类不确定度来源,进行B类不确定度评定。最后将A类与B类不确定度合成,得到扩展不确定度。该评定方法对风向传感器校准结果可信度评定具有参考价值。

Based on the static three-point calibration method of wind direction sensors,an evaluating method of measurement uncertainty for calibration results about wind direction sensors of automatic weather stations is introduced.The purpose is to ensure the accurate,reliable and credible observation data of wind direction sensors.In this paper,according to the requirement of the ＂Calibration Method of Wind Direction of Automatic Meteorological Station ＂and JJF1059.1—2012 ＂Evaluation an Expression of Uncertainty in Measurement,＂ten repeated tests are designed for the three calibration points of wind direction,and the sample standard deviation is merged to evaluate the uncertainty of Type A.The uncertainty sources of Type B in the calibration process are analyzed,and the uncertainty of Type B is evaluated.Finally,the extended uncertainty is obtained by combining the uncertainties of Type A and Type B.The evaluation method can provide a reference for evaluating the reliability of calibration results of wind direction sensors.