Global calibration method of multi-station articulated arm type measurement platform

Abstract

The invention relates to a global calibration method for a multi-station articulated arm type measurement platform, and the method comprises the following steps: track movement starting points at twosides are set, and a laser tracker and a three-dimensional target are installed; a target ball is placed on the sliding block of the track on one side, the sliding block starts to move from the movement starting point and walks by 10 m with the step length of 0.5 m, and a laser tracker collects the coordinates of the target ball after the sliding block stops each time and fits the linear directionvector of movement; at the initial position, the articulated arm measuring instrument and the laser tracker respectively measure the coordinates of the target ball on the three-dimensional target, and calculate the positional relationship between the articulated arm measuring instrument and the laser tracker at the initial position; the process is repeated on the tracks on the two sides; a lasertracker coordinate system is used as a global coordinate system, and unification from the coordinate system at any position of the 1-side track and the 2-side track to the global coordinate system isachieved. According to the invention, global calibration of a measurement mode of free movement of the articulated arm measurement instrument in a large range can be realized, and a new way for globalcalibration of a multi-station articulated arm type measurement platform is provided.

Description

technical field [0001] The invention relates to a global calibration method of a multi-station articulated arm measuring platform, which can realize the global calibration of a measuring mode in which an articulated arm measuring instrument moves freely in a large range. Background technique [0002] The multi-station articulated arm measuring platform is a platform composed of double slide rails and double articulated arm measuring instruments that can measure geometric parameters in a large range. The working process is that the articulated arm measuring instruments measure workpieces at different positions on their respective guide rails. The surface point cloud is integrated with the measurement point cloud of different stations for overall data analysis. Therefore, it is required to establish the mutual positional relationship of the track joint arm measuring instruments on both sides at different measuring stations. A common practice is to divide the stations with sma...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the existing actual needs, the technical problem to be solved by the present invention is to provide a global calibration method for a large measuring range double-track double-joint arm geometric measurement platform

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