High-precision construction method for laser tracker measurement network

Abstract

Efficient and precise automatic measurement is essential for evaluating the manufacturing accuracy of industrial components. The measurement network composed of multiple laser tracker measurement stations (LTMSs) as the foundation for achieving automated measurement of large-scale industrial components, it is particularly important to improve its measurement accuracy. However, the measurement accuracy of the measurement network, which is constructed according to the existing methods, often deviates from its optimal state. To address this, a high-precision construction method for laser tracker measurement network is developed. Firstly, the weight coefficient matrix based on the measurement errors of enhanced reference system points and the iterative optimization algorithm are used to improve the accuracy of the transformation parameters between adjacent LTMSs. Secondly, the optimal number of LTMSs is determined based on the principle of minimizing overall measurement errors for any two measurement points. Finally, the spatial position of each LTMS is optimized according to the principle of minimum measurement errors. The transformation parameters verification experiment and the simulation measurement experiment prove the effectiveness of the proposed method, which can significantly reduce the transformation errors and the overall measurement errors. The proposed method provides a valuable way for industries to improve the performance of automatic measurement of laser tracker measurement networks in real environment.