烤烟房空气相对湿度计算方法研究  

Method for calculating relative humidity in flue-cured tobacco chamber

作　　者：黄晓因[1] 周平[2] 

机构地区：[1]云南农业大学计算机科学系,昆明650201 [2]云南农业大学农业气象教研室,昆明650201

出　　处：《农业工程学报》2006年第1期164-166,共3页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(40265001)

摘　　要：目前，烤烟房普遍使用干湿球测湿法测量空气相对湿度，作者在验证其测量精度后发现，当烤烟房温度高于40℃以后。采用于湿球法获得的相对湿度值与基准仪器测量得到的相对湿度值相比，有较大差异，当温度较高且相对湿度较低时差异更明显。为此，在温度、湿度控制室内，获得了干湿球系数与风速、环境温度相关的试验数据。利用函数逼近理论和最小二乘法，提出了干湿球系数A新的数据融合计算公式。得到的结论是：风速在0．2～4m／s、温度在40～70℃和相对湿度大于40％R．H的范围内，使用此公式获得A值后再计算出的相对湿度值，其误差小于1．5％R．H。At present, psychrometric method is widely used to measure the relative humidity in the flue-cured tobacco chamber. The author discovered that when the temperature in the flue-cured tobacco house was higher than 40℃, the relative humidity value obtained by psychrometric method was different from that measured by the criterion instrument. And the difference is greater when the temperature is higher and the relative humidity is lower. Therefore, the author established the experimental data of psychrometric coefficient A related to temperature and wind velocity in temperature and humidity control room. By using approximation theory and least spuare algorithms, a new data-fusion formula of psychrometric coefficient A was presented. It is demonstrated that the error of the relative humidity value calculated from A value obtained by employing this formula is less than 1.5 R. H, in the range of wind velocity within 0.2-4.0 m/s, temperature within 40-70℃ and the relative humidity higher than 40%R. H.

关 键 词：干湿球法 烤烟房 相对湿度 温度 计算方法 

分 类 号：TS48[农业科学—烟草工业]