目的：研究在气候环境试验中如何把露点温度作为控制目标的方法。方法选择干湿球温度表作为测量湿度的传感器，饱和水汽压是计算湿度量的一个重要参数，探究出便于在微控制器上应用的计算饱和水汽压的公式，然后建立露点温度计算模型，得出水汽压与露点温度的关系式。结果通过0~100℃的100组样本值的验证，与《湿度查算手册》值比较，平均误差较小。结论该公式适用于湿度试验箱中微控制器中露点温度的处理问题。%Objective To study a method to set the dew point temperature as a control target in the climate environment test. Methods Wet and dry bulb thermometer was selected as the sensor to measure the vapor pressure, and the saturation vapor pressure was used as an important parameter to calculate the humidity, in order to explore an equation for calculating saturation vapor pressure applicable in micro-controller. Then a dew point temperature calculation model was established to obtain the relationship between the dew point temperature and vapor pressure. Results The values of 100 groups of samples in the range of 0-100℃had small average error in comparison with the values in"Psychrometric Handbook". Conclusion This formula could be applied to calculate the dew point temperature in the humidity test.
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