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http://dx.doi.org/10.3741/JKWRA.2015.48.8.659

A Test of a Far Infrared Camera for Development of New Surface Image Velocimeter for Day and Night Measurement  

Yu, Kwonkyu (Dept. of Civil Eng., Dong-eui University)
Kim, Seojun (Dept. of Civil & Environmental Eng, Dankook University)
Yoo, Byeongnam (Dept. of Civil Eng., Dong-eui University)
Bae, Inhyuk (Dept. of Civil & Environmental Eng, Myongji University)
Publication Information
Journal of Korea Water Resources Association / v.48, no.8, 2015 , pp. 659-672 More about this Journal
Abstract
In flow velocity measurement of natural rivers, taking images with proper image quality is the fundamental and the most important step. Since flood peaks generally occur in night time, it is very difficult to capture proper images in that time. The present study aims to test a far infra-red camera as a adequate alternative to resolve the various problems in measuring flood discharges. The far infra-red cameras are able to capture images in night time without help of any extra illuminations. Futhermore they are not affected by fog nor smoke, hence they can be adapted for a fixed-type surface image velocimeters. For comparison, a commercial camcorder and a near infra-red cameras were used together. The test images were taken at a day time and a night time, and the image acquisition work were performed at an artificial flow channel of the Andong River Experiment Station. The analyzed results showed that the far infra-red camera would be a good instrument for surface image velocimeters, since they were able to capture regardless light condition. There are, however, a few minor problems in their accuracy of the analyzed results. About their accuracy a more study would be required.
Keywords
velocity measurement; far infra-red camera; near infra-red camera; surface image velocimeter;
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Times Cited By KSCI : 4  (Citation Analysis)
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