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An efficent method of binocular data reconstruction
( Yunbo Rao ),( Xianshu Ding ),( Bojiang Fan ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.9
3D reconstruction based on binocular data is significant to machine vision. In our method, we propose a new and high efficiency 3D reconstruction approach by using a consumer camera aiming to: 1) address the configuration problem of dual camera in the binocular reconstruction system; 2) address stereo matching can hardly be done well problem in both time computing and precision. The kernel feature is firstly proposed in calibration stage to rectify the epipolar. Then, we segment the objects in the camera into background and foreground, for which system obtains the disparity by different method: local window matching and kernel feature-based matching. Extensive experiments demonstrate our proposed algorithm represents accurate 3D model.
Hong Zhang,Lei Shi,Xuhui Liu,Xianshu Leng,Ding Feng,Paul Tu 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.12
Wellbore trajectory control tool is a sort of point-the-bit drilling tool to achieve the steering function while drilling. In complex conditions, the spindle bears the acting force of the bit pressure, the torque, the force of biasing mechanism and so on. So the force is very complex. Basing on the early research of our group, the further research of spindle deflecting reliability of prototype has been carried out. Based on the contact analysis between the tool spindle and the inner eccentric ring, the variation law of contact stress between the inner ring of the eccentric mechanism and the spindle is studied. Based on Palmgren-Miner and the fatigue life experiment of the spindle material, the cumulative damage calculation model of the spindle is established, and the fatigue life of spindle is solved. The result shows that the deflecting reliability of the spindle can be guaranteed.