Treffer: Metrologically significant software for evaluating the accuracy characteristics of ground-based laser coordinate measuring systems: initial assessment of functionality.

The paper presents an experimental analysis of software used to calculate the center coordinates of reference spheres by means of laser coordinate measuring systems. The analyzed software of the manufacturers of laser coordinate measuring systems is redundant in terms of functionality and is designed to implement a set of large scientific and educational projects; however, it is not intended to provide metrological support for laser coordinate measuring systems. The considered examples of software are not metrological programs and need to be optimized to be used for metrological purposes. The study solves the problem related to the highly accurate processing of measurement data (three-dimensional point clouds) in the metrological evaluation of ground-based laser coordinate measuring systems. Software (algorithm for processing measurement results) was developed to determine the center coordinates of a reference sphere with a metrological accuracy margin sufficient for calibrating such measuring instruments as absolute trackers and scanners in terms of the main characteristic. A MATLAB-implemented algorithm is proposed, which can use a set of spatial measurement data to recognize a sphere and calculate its center coordinates, thus qualitatively assessing the main metrological characteristic of laser coordinate measuring systems. The article presents the results of an experiment using the proposed algorithm for calculating the center coordinates of reference spheres, which are part of a reference system for three-dimensional measurements (coordinate measurements; coordinate increments) within the range of 0–60 m from GET 199-2024 State primary special standard of the unit of length. The efficiency of the proposed algorithm is confirmed by the results of actual measurements. In the future, the developed algorithm will be incorporated into specialized software, which will be used by standardization and metrology centers, as well as accredited metrology laboratories. This will lead to a unified way of processing the measurement results of absolute trackers, terrestrial laser scanners, and their counterparts. [ABSTRACT FROM AUTHOR]

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