2022 CAS Research-Grade Precision Measurement Project Proposal: Bozhida Granite Platform

In 2022, the Chinese Academy of Sciences continued to make breakthroughs in cutting-edge research fields such as precision measurement, the development of high-end scientific instruments, and the validation of core components. Faced with the stringent measurement accuracy requirements of scientific research, as well as the need to inspect complex samples and large-scale components, the establishment of a stable, precise, and reliable precision inspection system has become a key pillar supporting the smooth progress of research projects. This project solution is specifically tailored to the research scenarios of the Chinese Academy of Sciences. It integrates the large-space measurement capabilities of laser trackers with the high-resolution surface capture technology of blue-light scanners. Centered around the Bozhida 8m×4m ultra-large high-precision granite measurement platform as the core base, the system meets the Academy’s core requirements for large-scale scientific samples and large-space precision inspection. It provides comprehensive precision inspection support for relevant research projects at the Academy, facilitating the efficient production of scientific results.

As one of the core suppliers of measurement platforms for CAS research equipment, Bozhida has deep expertise in the field of high-precision measurement platforms, particularly in the R&D and manufacturing of ultra-large-scale platforms. The company possesses a profound understanding of how the fundamental stability of measurement platforms critically impacts the rigor of experimental data in scientific research. This project proposal moves beyond a mere accumulation of hardware specifications, focusing instead on the CAS’s core requirements for “zero interference,” “high consistency,” and “large-scale component inspection.” It precisely aligns with specific research scenarios and integrates the CAS’s unique research characteristics in precision measurement, quantum sensing, optical instrument development, and large-scale aerospace component inspection. This ensures the measurement system delivers peak performance, providing a solid foundation for the reliability of research data.

The implementation of this project is divided into three key phases, closely aligned with the rigorous requirements of CAS’s scientific experiments, and fully leveraging the core advantages of the 8m × 4m ultra-large testing platform. First, leveraging the excellent thermal stability and seismic resistance of the Bozhida 8m×4m ultra-large granite platform, an absolute stationary global coordinate system is established for the laser tracker. This effectively eliminates reference drift caused by micro-vibrations and minor temperature fluctuations in the laboratory environment, ensuring the stability of the measurement reference. At the same time, by utilizing the advantages of the ultra-large platform, it can easily accommodate large-scale research samples (such as large optical components, aerospace-grade test specimens, and high-end research molds), meeting the inspection needs of various large-scale components. Secondly, when performing blue-light scanning operations on the ultra-large granite platform, the surface’s high flatness and wear resistance ensure repeatable positioning accuracy during scanning. The expansive platform allows for the scanning of large samples in a single pass without the need for disassembly, enabling the efficient capture of complete point cloud data for complex surfaces, microstructures, and large components. This is suitable for surface inspection of samples such as precision optical elements, large research molds, and aerospace components, significantly improving scanning efficiency and data integrity. Finally, by leveraging the platform’s unified physical reference, the system achieves seamless integration of data from both laser trackers and blue-light scanners. This significantly reduces coordinate conversion errors and improves the efficiency of closed-loop scientific data processing, providing precise data support for experimental analysis and sample optimization, thereby helping researchers rapidly complete experimental validation.

The core advantage of this project lies in the dual enhancement of research-grade “latent accuracy” and “compatibility with oversized dimensions,” precisely addressing the requirements of the Chinese Academy of Sciences’ long-term research experiments involving large-scale components. The Bozhida 8m × 4m ultra-large granite measurement platform is constructed from high-quality natural granite with an extremely low coefficient of linear expansion (controlled at (0.5–0.8) × 10^(−6)/°C). Within the temperature fluctuation range (±2°C) typical of CAS research laboratories, it maintains consistent geometric dimensional stability; simultaneously, the platform’s overall flatness is ≤0.02 mm/m (full-length flatness ≤0.16 mm), and a surface roughness of Ra ≤ 0.02 μm. Even across the entire 8m × 4m surface, it achieves high-precision flatness control throughout the entire area, ensuring the consistency and rigor of measurement data in various long-term and large-scale component research projects at the Chinese Academy of Sciences in 2022. It provides reliable data assurance for research topics such as quantum precision measurement, optical component inspection, and verification of large aerospace components. Additionally, its high damping characteristics effectively absorb micro-vibrations generated during the operation of laser trackers and blue-light scanners, preventing damage to precision optical components, research samples, and large-scale components, thereby safeguarding experimental equipment and samples. For CAS researchers, this translates to reduced time spent on repeated calibrations and more reliable experimental validation results. It also resolves the challenge of disassembling large components for inspection, effectively shortening research cycles, facilitating the efficient advancement of research projects and breakthroughs, and providing solid data support for the publication of high-level academic achievements in related fields.

This project will fully support the advancement of relevant research projects at the Chinese Academy of Sciences in 2022. Bozhida will utilize an 8m × 4m ultra-large, high-precision granite inspection platform as its core, leveraging base technology that meets the highest international research standards to continuously support the efficient coordination of laser tracking and blue-light scanning systems. Working in collaboration with the Chinese Academy of Sciences research team, Bozhida will assist in the inspection of various large components and and precision samples, helping the CAS achieve technological breakthroughs in precision measurement, the development of high-end scientific instruments, and the verification of large aerospace components. This initiative will lay a solid metrological foundation for the development of China’s high-end scientific research endeavors and promote the transformation and application of research outcomes.