镶嵌在国徽上象征工业的齿轮在信息时代仍具有不可替代的作用，并且其性能要求越来越高。制造技术的进步为齿轮加工提供了先进手段，但历经百年发展而现处于第三代的齿轮测量，其基础理论40多年未有变革，已不能满足当代及未来齿轮测量的要求。顺应齿轮技术与精密测量技术的发展潮流，下一代齿轮测量将基于云平台，具有“完整、智能、兼容、开放”四大特征；为此，本项目以下一代齿轮测量的基础理论和关键技术为研究对象，以齿轮评价与测量结果运用为核心，深入研究齿轮广义精度理论和全信息评价体系，提出基于齿轮多自由度误差理论的工艺误差分析与溯源方法，提出基于全信息的齿轮动态特性预报方法，定义齿轮测量数据标准化接口，提出齿轮测量云平台的建设方案，构建下一代齿轮测量实验验证系统。通过本项研究，将实现以齿轮测量为纽带的齿轮设计、加工、检测、服役“全生命周期”的闭环控制，为我国齿轮产业升级提供技术支撑，并引领世界齿轮测量发展方向。

Gears, as the symbol of industry on the national emblem of China, still fill an irreplaceable role in the information age. The progressive techniques of manufacture have provided plenty of advanced approaches for gear processing. But the basic theories of gear metrology, which is in the third generation after 100 years development, have not changed for over 40 years. It is impossible for the conventional basic theories of gear metrology to meet the progressing requirements nowadays and in future. Following the trend of gear technology and precision measurement technology, the next generation of gear metrology should be based on cloud platforms and has the following characteristics - integrity, intelligence, compatibility and openness. Therefore, this project will take the basic theories and key techniques in next generation of gear measurement as research objects, will take gear evaluation and applying of measurements as the core, will research the gear general accuracy theory and full-information evaluation system, will present the method of process analysis and error tracing based on multi-degrees of freedom theory for gear deviation, will propose the prediction technique of gear dynamic features based on full information, will define standardized interfaces of gear measuring data, will make a scheme for setting up a gear measurement cloud platform and build an experiment validation system for the next generation gear measurement. According to this project, full closed-loop control in the stages of design, manufacture, inspection and service for gears will be achieved, which will support gear industrial upgrading in China and will lead the future tide of gear measurement throughout the world.