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DEVELOPMENT OF AN AUTOMATIC-MEASURING SYSTEM OF CLOUD AMOUNT

云量自动测量系统的研制

基本信息

批准号：
08555146
负责人：
KOGA Yasuko
金额：
$ 7.49万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555146/
关键词：
COLOR TEMPERATURE CLOUD TYPE DAYLIGHT SOLAR RADIATION ILLUMINANCE IRRADIANCE 放射照度昼光照明天空光

项目摘要

The objectives of this research are to construct a system of mechanically measuring and recording cloud amount and to develop an instrument. The researchresults are the followings :1) Determination of a mechanical-measuring system of cloud amountA method of discriminating between the blue sky and clouds was determined. It utilizes correlated color temperature of skylight with respect to solar altitude, altitude of a sky element and angular distance between the sky element and the sun. Cloud amount is obtained by scanning the sky and measuring the correlated color temperature of sky elements.2) Development of a prototype of a sky scanner and a measuring programA prototype of a sky scanner for cloud amount measurement was developed. It consists of a luminance colorimeter and a driving unit. A computer program was also developed for the measurement. Their performance was validated as a whole, though the weight of the luminance colorimeter caused some loads on the driving gear.3) Cloud amount measurement by the sky scannerCloud amount measurements were carried out using the sky scanner at Kyushu University with daylight and solar radiation measurements. Global illuminance and irradiance decreased, and diffuse illuminance and irradiance increased slightly as the cloud amount increased.4) Cloud amount measurement by a video camera systemCloud amount measurements were carried out using a video camera system at Kyushu Kyoritsu University with daylight and solar radiation measurements. Cloud amount is assessed from video camera images of the whole sky. There seemed to be no influence of high clouds on global illuminance.

本研究的目的是构建一个机械测量和记录云量的系统并开发一种仪器。研究结果如下：1）确定了一种机械式测云系统，确定了一种判别蓝天和云的方法。它利用相关的色温的天窗相对于太阳高度，高度的天空元素和天空元素和太阳之间的角距离。通过扫描天空并测量天空元素的相关色温来获得云量。2）天空扫描仪原型和测量程序的开发研制了用于云量测量的天空扫描仪原型。它由亮度色度计和驱动单元组成。还开发了用于测量的计算机程序。虽然亮度色度计的重量对驱动齿轮造成了一定的负荷，但它们的性能总体上得到了验证。3）天空扫描仪的云量测量使用九州大学的天空扫描仪进行了云量测量，并测量了日光和太阳辐射。随着云量的增加，总照度和辐照度降低，漫射照度和辐照度略有增加。4）通过摄像系统进行云量测量九州共立大学使用摄像系统进行了云量测量，并测量了日光和太阳辐射。云量是从整个天空的视频摄像机图像评估。高云似乎对全球照度没有影响。