Measuring principle and uncertainty analysis of a large volume measurement network based on the combination of iGPS and portable scanner

In the large-size product assembly process, the inspection of the large-size components and quality assurance of the product requires advanced digital metrologies, which include high-precision and high-efficiency measuring devices, and corresponding measuring approaches. The single measuring device or measurement field usually cannot meet the demands of measuring in the large-size assembly site; instead, a measurement network based on the combination of multi devices, is a better choice for the manufacturers. In this paper, a measurement network constructed by iGPS and portable scanner is proposed. The measuring principles of the two kinds of measuring devices are studied firstly, as well as the characteristics of their layouts and measurement uncertainties, based on simulating and actual measuring experiments. Then, the measuring principle, structure and uncertainty characteristics of the measurement network are discussed in detail, with measurement data analysis of the measuring experiments. Finally, a few conclusions and the future work are illustrated.