一种空气相对湿度算法及其编程

通过对湿度查算表湿度、干球温度、干湿球温差数据间关系的分析研究，提出一种根据湿度基准值进行二次线性插值求得湿度测量值的计算方法。对计算准确度、测量范围与基准值设置的关系做了讨论，给出了计算方法的C语言程序。本方法简便、准确，如计算结果四舍五人保留整数，则与湿度查算表数值完全吻合。实验表明：应用此方法的实时测湿系统，其湿度测量精度主要取决于温度测量精度。

A Calculation Method for Relative Air Humidity and its Program Realization

Based on Benchmark data, a calculation method for relative air humidity using linear insertion method was put forward, through analyzing the relations among humidity, dry-bulb temperature and damp bulb temperature contrast. The relations between accuracy, measure bound and benchmark data were discussed. This calculation method is a simple and accurate method in calculation. The calculated results are highly identical with the value obtained from datasheet. Applying this method in real-time system showed that the value accuracy measured humidity depended mainly on the accuracy measured temperature.