两种气象用湿度传感器比对结果的详细统计分析

Comprehensive statistical analysis of comparison results of two types of humidity sensors in meteorology

空气湿度是自动气象站的重要观测要素,其准确度至关重要。为比较DHC2型和DHC1型两种气象用温湿度传感器的湿度测量性能,选取上述两种型号的传感器各100支,以3MS计量检定系统为实验装置,确保比对结果的准确性和代表性,为测量准确度的分析及湿度的修正提供理论参考。结果表明,相较于DHC2型,DHC1型正反行程中正负误差所占比重变化相对平缓,但高湿时正误差率大,更容易出现高湿不退的情况;两种传感器湿度的平均误差曲线趋势基本一致,DHC1型平均误差-1.23%RH~0.72%RH,DHC2型平均误差-2.56%RH~0.55%RH。在实际业务中应当选择合适的型号,或针对不同型号作相应的误差修正。

Air humidity is an important observation element of automatic weather stations, and its accuracy is very important. In this study, in order to compare the measurement performance of humidity of DHC2 and DHC1 temperature and humidity sensors, a hundred sensors of each of the above two types are selected, and the 3 MS measurement and verification system is used as the experimental device to ensure the accuracy and representative of the comparison results and provide theoretical reference for the analysis of measurement accuracy and correction of humidity. The results are as follows. Compared with DHC2, the proportion of positive and negative errors in positive and negative strokes of DHC1 changes relatively smoothly, but the positive error rate is larger in high humidity, which may causes the sensor to exceed 100%RH, and it is more prone to high humidity;the trend of average error curve of the two types of humidity sensors is basically the same, the average error of DHC1 is-1.23%RH~0.72%RH, and the average error of DHC2 is-2.56%RH~0.55%RH. In practical work, the appropriate model should be chosen, or error corrections for different models should be made.