结露自动化观测装置及试验研究  

A New Automated Dewgauge and Experiment

作　　者：李肖霞[1] 马舒庆[1] 吴可军[1] 张雪芬[1] 杜波[1] 卓问[2] 

机构地区：[1]中国气象局气象探测中心,北京100081 [2]华中科技大学,武汉430074

出　　处：《气象》2012年第4期501-507,共7页Meteorological Monthly

基　　金：公益性行业(气象)专项(GYHY200906032)资助

摘　　要：文章介绍了一套结露自动化观测装置,由CCD图像传感器、露采集器和处理器构成。露采集器由三层带有磨砂区域的玻璃片组成,CCD图像传感器获取玻璃片的图像传送给处理器,结露时磨砂区域与未磨砂区域亮度差值发生变化,处理器自动提取亮度差值及变化信息,识别结露是否发生,从而实现对结露的自动化观测。为了定量分析自动化结露观测装置的性能,设计了观测试验,利用温湿度计观测露采集器附近的温湿度,分析研究湿度与亮度差值及结露的关系,试验结果表明,相对湿度大于97.9%时开始结露,玻片亮度归一化差值迅速降低。结露的信息获取率百分之百,结露自动识别率大于85%。A new automated dewgauge is proposed. It consists of CCD image sensor, dew collector and pro- cessor, in which dew collector comprises three set glasses installed at different height, and each glass set consists of transparent glass and ground glass. The brightness of the glass would change when condensa-tion occurs. The images of three set glasses are transmitted to the processor to determine whether moisture condensation occurs. The humidity is measured using hygrothermograph to test the dew automated data. Research has shown that it is possible to discriminate the moisture condensation. The normalized bright-ness difference of the glass decreases rapidly when the relative humidity is greater than 97.9 %. The meas- ured method and the algorithm have good performance. The dew acquisition can be a hundred percent and the automatic identification rate arrives more than 85 %. Thus it can be applied to meteorological observa-tion.

关 键 词：自动化 结露观测 试验 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术]