干湿表与湿敏电容测量差异原因初探  

Analysis on the causes of measurement errors between psychrometer and humidity-sensitive capacitance

作　　者：刘慧杰[1] 李永存[2] 

机构地区：[1]中国气象局气象干部培训学院安徽分院,合肥230031 [2]安徽省蚌埠市气象局,蚌埠233001

出　　处：《气象水文海洋仪器》2015年第4期33-35,共3页Meteorological,Hydrological and Marine Instruments

摘　　要：通过对干湿表湿度测量与自动气象站湿敏电容的对比观测实验,并对观测数据进行分析,表明了干湿表测湿与自动气象站湿敏电容测湿之间的系统差异重要原因之一在于湿球温度表下面水杯的存在,水体蒸发在给湿球温度表降温的同时,也增加了百叶箱内的湿度,无盖的水杯会增加百叶箱内相对湿度1%RH。根据实验结果,可以合理地处理人工观测湿度序列与自动气象站湿度序列之间2%RH^3%RH的系统差异。Through comparative experiment on humidity measurement by psychrometer and humiditysensitive capacitance,the observational data are analyzed.The results show that one of important reasons that caused measurement errors is the glass existed below the psychrometer.The water evaporation cools the temperature of wet bulb,while it also increases the temperature inside the screen.The glass without the cover will increase 1%RH relative humidity of the screen.According to the test results,the system differences within 2%RH^3%RH on humidity sequences of psychrometer and humidity-sensitive capacitance can be reasonably handled.

关 键 词：干湿表 湿敏电容 系统差异 

分 类 号：P412.13[天文地球—大气科学及气象学]