Development of new techniques for high-speed and high-accuracy industrial part metrology**

零件计量对于制造业的质量控制至关重要，其市场容量在2016年达到4650亿美元。汽车零部件制造商--包括奇昊汽车（KIRCHHOFF Automotive），该项目的两个支持组织之一--已经大幅提高了他们的零部件质量控制标准，以保持竞争力。每个零件的几何形状都必须精确测量，以确保正确的尺寸和完美的配合，并具有越来越严格的公差。最先进的3D测量系统（例如，我们的另一个支持机构LMI Technologies的Gocator扫描仪已在奇昊汽车制造的零件上应用和测试。不幸的是，这些测量技术和系统很慢（每秒约5帧，fps）。对于大部件（例如，2米长的交叉车梁），需要90秒以上的时间来检查~100个特征（即，边缘、孔的尺寸、是否存在剪等）商业3D扫描仪和图像处理软件。此外，这些测量系统对于具有显著反射率变化、大曲率和大深度的部件也具有差的精度。汽车行业和更广泛的制造业需要高速和高精度3D形状零件测量的新技术。*该项目旨在开发新技术和仪器原型，用于工业零件的3D测量，其性能优于现有的3D零件计量系统。本计画有三个具体目标：（1）发展一种新的硬体/扫瞄器原型，以产生适应性变化的曲面图案，并投射出具有变化强度的结构光;（2）发展新的相位量测技术，以应用于零件检测/量测;以及（3）通过对工业部件进行高速测量来评估系统的性能（>50 fps vs. 5 fps的最先进的），和高精度（2% vs. 15%的最先进的部分与大曲率和显着的反射率变化）。

Parts metrology is critical for quality control in the manufacturing industry, and its market capacity reached US$465 billion in 2016. Automotive part manufacturers-including KIRCHHOFF Automotive, one of the two supporting organizations for this project-have dramatically raised their part quality control standards to stay competitive. The geometry of every part must be accurately measured to ensure correct dimensions and perfect fit with increasingly tight tolerances. State-of-the-art 3D measurement systems (e.g., Gocator scanners from our other supporting organization, LMI Technologies) have been applied and tested on parts manufactured by KIRCHHOFF Automotive. Unfortunately, these measurement techniques and systems are slow (~5 frames per second, fps). For large parts (e.g., 2-meter-long cross car beams), it takes more than 90 seconds to inspect ~100 features (i.e., dimensions of edges, holes, presence of the clippers, etc.) with commercial 3D scanners and image processing software. Furthermore, these measurement systems also have poor accuracy for parts with significant variations in reflectance, large curvatures, and large depths. The automotive industry and the broader manufacturing industry demand new technologies for high-speed and high-accuracy 3D shape part metrology.****This project aims to develop new techniques and an instrument prototype for 3D measurement of industrial parts with better performance than existing 3D part metrology systems. This project has three specific objectives: (1) to develop a new hardware/scanner prototype for generating adaptively varied curved patterns and project structured light with varying intensities; (2) to develop new phase-based measurement techniques for part inspection/metrology; and (3) to evaluate the performance of the system by performing measurements on industrial parts with a high speed (>50 fps vs. 5 fps in state-of-the-art), and high accuracy (2% vs. 15% in state-of-the-art for parts with large curvatures and significant reflectance variations).