风速检定中对标准风速测量值的影响量分析

Analysis of Influence Factors on the Standard Wind Speed Measurements in the Calibration of Wind Instrument

针对风速仪检定中对标准风速测量值影响的量进行分析,找出了主要影响量,并加以消除,使检定结果更加真实、可靠。利用JJG431-86检定规程中已知的计算公式进行论证分析,并用实例进行验证。结果表明,实验室温度对标准风速的测量值影响大,应加以温度控制,在检定一台风速仪前后,实验室的温度变化不应该超过3℃。而空气密度修正系数查算表过于粗略,对标准风速的影响值也不可忽视,应该用公式直接计算进行误差消除。

This paper mainly aims at wind speed calibration by standard wind speed measurements and its influence factor analysis. First, we find out the main influence factors, and then eliminate them, thus make the calibration results more real and reliable. The calculation formula in JJG431-86 verification regulation is used for argument analysis, and the examples are used for verification. The results show that laboratory temperature is the great factor of influence on the standard wind speed, thus it must be temperature-controlling. In the calibration of an anemometer, the temperature change of the laboratory should not be more than 3~C. The air density correction coefficient in the table is too sketchy, and the influence values on standard wind speed can not be ignored, therefore we should use the formula to calculate directly and eliminate errors.