Three-dimensional non-orthogonal tracking and scanning test head calibrating method

Abstract

The invention discloses a three-dimensional non-orthogonal tracking and scanning test head calibrating method, and belongs to the field of precise instrument measurement. The three-dimensional non-orthogonal tracking and scanning test head calibrating method is designed for a coordinate measuring machine, a precise numerical control machine tool and other precise measuring instrument on the basisof a three-dimensional coordinate measuring system. By means of the method, through the coupling effect of a cubic-term fitting decoupling sensor, in cooperation with a corresponding data collecting method, by introducing a self-adaptive genetic algorithm for solution, the calibrating precision is greatly improved, and meanwhile external parameters and internal parameters of a test head are calibrated and the calibrating operation process is simplified. The method is suitable for the three-dimensional non-orthogonal tracking and scanning test head.

Description

technical field [0001] The invention belongs to the field of precision testing technology, instruments and precision machinery, in particular to a three-dimensional non-orthogonal tracking scanning probe calibration method based on a coordinate measuring machine. Background technique [0002] In manufacturing and processing, accurate and timely acquisition of characteristic information of the measured object can improve processing accuracy, improve part manufacturing efficiency, and reduce production costs. Measurement technology has become an important technology in the industrial field. At present, the detection methods of parts in the industrial field can be divided into two categories: contact and non-contact. Non-contact measurement such as laser measurement, structured light vision measurement, etc., has a high efficiency of information acquisition, and the accuracy is better in the laboratory environment, but in actual use, its measurement accuracy and stability are v...

AI Technical Summary

Problems solved by technology

In the non-orthogonal structure of the three-dimensional tracking scanning probe, the mutual coupling effect is relatively serious, that is, the mutual coupling between the sensors inside the probe has an adverse effect on the accuracy

These factors cause the above calibration algorithm to fail to reflect the actual working conditions of the internal sensors of the 3D non-orthogonal tracking scanning probe, resulting in large calibration errors

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