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http://dx.doi.org/10.3741/JKWRA.2017.50.9.597

A study on the applicability of invisible environment of surface image velocimeter using far infrared camera  

Bae, Inhyuk (Department of Civil Engineering, Dong-eui University)
Yu, Kwonkyu (Department of Civil Engineering, Dong-eui University)
Yoon, Byungman (Department of Civil & Environmental Engineering, Myongji University)
Kim, Seojun (Department of Civil & Environmental Engineering, Myongji University)
Publication Information
Journal of Korea Water Resources Association / v.50, no.9, 2017 , pp. 597-607 More about this Journal
Abstract
In this study, the applicability of the surface image velocimeter using the far-infrared camera was examined in order to solve the application problem of the measurement in night time, which has been pointed out in previous studies as the limit of the surface image velocimeter. For this purpose, the accuracy evaluation of measurement of the far-infrared camera was conducted for two conditions. Accuracy was evaluated by calculating the relative error of the results of the measurements of surface image velocimeter using the normal video camera during the daytime that was already verified. As a result, the relative error of the surface velocimeter using the far infrared camera was 4.3% at maximum, the average error was about 1%, and the error of the fog condition was maximum 5.2% with an average of 2%. In conclusion, it is possible to measure with high accuracy when using far-infrared camera in a invisible environments where the water flow can not be visualized with a general camera.
Keywords
SIV; FIR-SIV; Far-infrared ray; Surface velocity; Invisible environment; Night-time measurement;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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