| The geometry measurement and control of large parts in the high-end equipment is the basis to ensure the quality of product delivery. The improvement of high-end equipment performance and productivity demands higher accuracy and efficiency for geometric dimension measurement. This paper introduces the working principles, typical instruments and application characteristics of six large-scale measurement technologies, including coordinate measurement, scanning measurement, attitude measurement, collaborative measurement, networking measurement and dynamic measurement, based on the measurement requirements of large-scale parts. The construction scheme and working characteristics of two special large-scale measurement systems, fixed measurement system and flexible measurement system, are analyzed. Furthermore, this paper summarizes the means and methods of laboratory calibration, on-site calibration and on-site verification of large-scale measurement system, and expounds the comprehensive development trend of large-scale, high precision, high efficiency, automation and intelligence of geometric dimension measurement of large-scale parts. |
