| In order to measure the accuracy of the intersection of visual docking calibration,this paper designed a docking intersection optical sensor test system. This6-axissystem is capable to process a high-precision measurements in each DOF. In theprocess of movement,The system will collecting measurement data from precisionsensors of each DOF.Firstly, this essay begin with the optical sensor measurement algorithm deeperresearch, and using a sub-pixel feature point extraction algorithm and visual camerafor imaging features, this paper based on gray squared weighted centroid algorithm tocalculate the characteristic values of the coordinates, the interpolation to increase theeffective number of pixels, so that the feature points within the imaging region toimprove the positioning accuracy of the centroid of the feature point.Next comes to process the overall design of the optical sensor measurementsystem, which is comprised by the six-DOF position orientation control systems andhigh-precision optical sensor measuring system. High-precision six-DOF motionplatform used to carry visual marker and optical sensor measurement system forreal-time calculation of the position and orientation of the moving platform, and theanalytical work is based on the information feed backed by the sensor.Then this essay process the structural analysis of the six degrees of freedommotion platform and camera turntable, given the impact of the payload deformationand vibration in the gravity field disturbances in the acceleration of the measurementaccuracy. Experimental results show that the impact can be ignored.Experimental results show that, When measuring a shorter distance, binocularmeasurement accuracy was higher than monocular measurement, as the distanceincreases, the binocular vision measurement is no longer have obvious advantages,close to the monocular measurement accuracy. Measurements can be done by usingmonocular optical sensor measuring measurement system calibration accuracy. |
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