超声波风速仪测量结果不确定度评定

Evaluation of uncertainty of measurement result of ultrasound anemometer

随着气象现代化的快速发展,越来越多的超声波风速仪已经投入到气象领域。为保证风速测量数据的准备、可靠,对其测量结果的不确定度分析很有必要。根据超声波风速仪国家标准中的测试方法及校准点,以国家气象计量站空气流速实验室校准WMT700型超声波风速仪为例,对风速的5个校准点进行重复测量,并依据JJF1059.1-2012测量不确定度的评定与表示要求,进行A类不确定度评定。同时分析测量过程中的B类不确定度来源,进行B类评定。最后通过合成得到扩展不确定度,该方法对超声波风速仪测量结果的可信度评定具有参考价值。

With the rapid development of meteorological modernization,more and more ultrasonic anemometers have been put into the meteorological field.In order to ensure the preparation and reliability of wind speed measurement data,it is necessary to analyze the uncertainty of its measurement results.According to the test methods and calibration points in the national standard of ultrasonic anemometer,taking the WMT700 type ultrasonic anemometer calibrated by the Air Velocity Laboratory of the National Meteorological Station as an example,five calibration points of wind speed are repeatedly measured,and the uncertainty of type A is evaluated according to the evaluation and expression requirements of JJF1059.1-2012 measurement uncertainty.At the same time,the sources of B uncertainty in the measurement process are analyzed and B uncertainty is evaluated.Finally,the extended uncertainty is obtained by synthesis.This method has reference value for the reliability evaluation of the measurement results of the ultrasonic anemometer.