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전형섭(Jeon, Hyeong-Seop),최영철(Choi, Young-Chul),박종원(Park, Jong-Won) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.12
This paper proposes a way to measure the displacement of a multi-point by using a pattern recognition from video signal. Generally in measuring displacement, gab sensor, which is a displacement sensor, is used. However, it is difficult to measure displacement by using a common sensor in places where it is unsuitable to attach a sensor, such as high-temperature areas or radioactive places. In this kind of places, non-contact methods should be used to measure displacement and in this study, images of CCD camera were used. When multi-point is measure by using a pattern recognition, it is possible to measure displacement with a non-contact method. It is simple to install and multi-point displacement measuring device so that it is advantageous to solve problems of spatial constraints.
전형섭(Jeon, Hyeong-Seop),최영철(Choi, Young-Chul),박진호(Park, Jin-Ho),박종원(Park, Jong-Won) 한국소음진동공학회 2010 한국소음진동공학회 논문집 Vol.20 No.11
Accelerometer and laser vibrometers are widely used to measure vibration of structures like a building or piping. Recently, the research measuring vibration by using camera image is introduced. This method can measure multi-points simultaneously. Also, it is possible to measure in the long distance. When we measure the vibration using a camera, the parameter analysis is needed. Therefore, this paper took the experiment for the camera lens selection. An error by the camera images characteristic was theoretically analyzed and we verified through an experiment. And the accuracy of the method measuring the vibration displacement by using the camera images was analyzed.