报告详情
Monitoring sedimentation of magnetorheological fluids using an in-situ visual monitoring system with a wide-angle lens
编号：66
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更新：2023-03-14 09:49:46 浏览：376次
口头报告
报告开始：2023年06月10日 10:35（Asia/Shanghai）
报告时间：20min
所在会场：[S1] Concurrent Session 1 [S1-4] Concurrent Session 1-4
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摘要
Magnetorheological (MR) fluids shows great potential in the field of engineering vibration reduction. However, sedimentation of magnetorheological fluids will occurs inevitably due to the strong density difference between the dispersed phase and the dispersion medium. Sedimentation seriously affects the service life of the material and limits its engineering application range. Monitoring techniques of MR fluids can effectively solve the problem of sedimentation, which has a great significance to the redistribution of magnetorheological fluid after sedimentation. Therefore, monitoring techniques of MR fluids has received more and more attention.
In this paper, a set of visual monitoring system with optical system installed inside magnetorheological fluid damper is proposed and constructed. the system could monitor the whole domain of magnetorheological fluids in real time, and test concentration of each partition of MR fluids. Firstly, the image of magnetorheological fluids is collected in real time by installing a wide-angle lens in the small hole inside the damper. According to the camera calibration method, the internal parameters and deviation factor of the wide-angle lens are obtained. Then, the mapping relationship between the real image and the distorted image will be derived by utilizing the Distortion model , and then the coordinate transformation of the image is performed to correct the distortion of the wide-angle lens. Secondly, the image after distortion correction is filtered to solve the problem of uneven image intensity and magnetic particles on the lens surface. Finally, based on the Kynch’s sedimentation theory, the corresponding relationship between the sedimentation rate and concentration of MR fluids is deduced. According to the changing information of image chromaticity and brightness, the concentration value of magnetorheological fluids in each partition of the image will be deduced. The experimental results show that the system can accurately obtain the sedimentation partition and partition concentration information of magnetorheological fluids, effectively monitor the real-time sedimentation state of internal magnetorheological fluids online, and provide a strategic signal for the possible active or operable re-dispersion of MR fluids.
In this paper, a set of visual monitoring system with optical system installed inside magnetorheological fluid damper is proposed and constructed. the system could monitor the whole domain of magnetorheological fluids in real time, and test concentration of each partition of MR fluids. Firstly, the image of magnetorheological fluids is collected in real time by installing a wide-angle lens in the small hole inside the damper. According to the camera calibration method, the internal parameters and deviation factor of the wide-angle lens are obtained. Then, the mapping relationship between the real image and the distorted image will be derived by utilizing the Distortion model , and then the coordinate transformation of the image is performed to correct the distortion of the wide-angle lens. Secondly, the image after distortion correction is filtered to solve the problem of uneven image intensity and magnetic particles on the lens surface. Finally, based on the Kynch’s sedimentation theory, the corresponding relationship between the sedimentation rate and concentration of MR fluids is deduced. According to the changing information of image chromaticity and brightness, the concentration value of magnetorheological fluids in each partition of the image will be deduced. The experimental results show that the system can accurately obtain the sedimentation partition and partition concentration information of magnetorheological fluids, effectively monitor the real-time sedimentation state of internal magnetorheological fluids online, and provide a strategic signal for the possible active or operable re-dispersion of MR fluids.
关键词
magnetorheological fluids,sedimentation,images,visual monitoring
报告人
Yang Jie
postgraduate student Chongqing University of Science & Technology稿件作者
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重要日期
-
会议日期
06月09日
2023
至06月12日
2023
-
03月15日 2023
摘要录用通知日期
-
03月31日 2023
摘要截稿日期
-
06月12日 2023
注册截止日期
-
09月20日 2023
初稿截稿日期
主办单位
Chongqing University
University of Science and Technology of China
University of Science and Technology of China
联系方式
- Registration/Event Questions
- er******@cqu.edu.cn
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