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The Pan-Tilt Unit (PTTJ) and camera composed a vision system, which can be used in vision measurement. In this paper, a new calibration method for this vision system using differential GPS (global positioning system) is described. The calibration method is an efficient solution for large field of view. The proposed method has advantages in speed, convenience and pertinence. The experimental results...
As a ground-based visual guidance system for autonomous UAV landing. In this paper, the cameras mounted on PTUs are used to dynamically measure the movement parameters of the UAV during the approaching phase. Owning to the limitation of manufacturing precision, there will be kinematic errors of PTU. In order to ensure the accuracy of UAV's attitude obtained, the exact error of PTU should be obtained...
A novel dehydration device was put forward to reduce the mist content in blast furnace gas. Aiming at the complex two-phase flow of curved-plate dehydration equipment, its capabilities were studied by changing the structures and operation parameters. The effects of all the factors on dehydration efficiency and pressure loss were also discussed. The results indicate that the optimum gas velocity is...
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