Evaluation of the Large-Length Indoor Standard Installation Based on Single Point Scanning

Abstract

The large length indoor standard installation (LLISI) serves as a standard traceability system for large-scale measuring devices, and hence evaluating the accuracy of its measurements during motion is of great importance. A laser tracker, as a single-point scanning method with strong anti-interference ability and high accuracy for 3D measurement, can meet the measurement requirements of LLISI. In this study, a laser tracker was used to evaluate the accuracy of LLISI during motion based on the single-point scanning method. Fifteen measurement combinations including five measurement intervals and three measurement speeds were selected in the experiment and the results were compared with the measurement data of a laser interferometer. By analyzing the local movement speed of the ISS platform, the uncertainty in local measurement speed of the platform was evaluated. The results showed that the laser tracker has high measurement accuracy and good repeatability for the measurement of LLISI, which can provide strong support for data resource protection of LLISI.

Analysis and research of laser measuring system in indoor large length standard device

“…The composite guide system is mainly composed of granite and linear guide. This part is mainly to realize the linear movement of the moving platform and ensure the continuous light of the laser interferometer measurement system during the measurement process [4]. The driving system mainly realizes the smooth operation of the composite guide rail through the electric control system.…”