汽车模具泡沫实型的三维光学快速检测研究

3D optical rapid inspect for foam model of auto dies

针对大型复杂曲面工件,现有的测量设备很难实现三维全尺寸质量检测的难题。针对汽车大型模具泡沫实型的快速检测要求,分析了三维光学测量的原理,提出了基于工业摄影测量XJTUDP系统的检测方案,并进行了试验验证。结果表明:"XJTUDP三维光学点测量系统"的相对精度达到1/60000～1/150000,"XJTUOM型三维光学密集点云测量系统"精度达到0.03mm,完全满足要求,而且检测速度快,可以解决大型模具的快速检测难题。

As to the large work-piece with complicated curves, the traditional measurement apparatus are incapable to realize the whole size measurement. In view of the need of 3D rapid measuring in auto die and mould foam model, the principle of 3D optical measuring system was analyzed, the XJTUDP 3D optical measuring system was developed, and the convenience and practice of this system were also verified by amount of measuring tests. Experiment results show that the relative accuracy of the ＂XJTUDP＂ 3D optical point measuring system is about 1/60000 to 1/150000, and the absolute accuracy of the ＂XJTUOM＂ 3D optical area scan measuring system is 0. 03 mrn. They can meet the requirement of measurement on large scale auto dies on the aspects of accuracy, speed and efficiency.