基于条纹投影轮廓术的航空高光零件三维测量技术  

3D Measurement of Aeronautical Shiny Parts Based on Fringe Projection Profilometry

作　　者：申皓 陈洪宇 王淇 杨林志 赵慧洁 姜宏志[2,3] SHEN Hao;CHEN Hongyu;WANG Qi;YANG Linzhi;ZHAO Huijie;JIANG Hongzhi(AVIC Chengdu Aircraft Industrial(Group)Co.,Ltd,Chengdu 610092,China;School of Instrumentation and Optoelectronic Engineering,Beihang University,Beijing 100191,China;Qingdao Research Institute,Beihang University,Qingdao 266101,China;Institute of Artificial Intelligence,Beihang University,Beijing 100191,China)

机构地区：[1]航空工业成都飞机工业(集团)有限责任公司,成都610092 [2]北京航空航天大学仪器科学与光电工程学院,北京100191 [3]北京航空航天大学青岛研究院,青岛266101 [4]北京航空航天大学人工智能研究院,北京100191

出　　处：《航空制造技术》2024年第6期48-54,共7页Aeronautical Manufacturing Technology

摘　　要：针对航空工业零件高光表面结构光三维测量中强反光和多次反光问题,提出了基于高动态多步相移和单像素成像相结合的三维测量技术,有效地解决了测量复杂反光表面时的点云缺失和精度下降问题。对标准量块进行三维测量和精度评价,基于高动态多步相移的三维测量技术拟合均方根误差为0.0066 mm,基于单像素成像的三维测量技术拟合均方根误差为0.0046 mm。以台阶标准器作为测量目标,开展绝对尺寸测量精度验证试验,绝对偏差不大于0.007 mm。分别对金属表面结构件(如航空发动机叶轮、涡轮叶片)和碳纤维结构件进行测量试验。试验结果表明,三维测量结果基本无点云缺失,强反光和多次反光区域均获取了完整的点云数据,实现了航空工业高光零件的精密三维测量。Aiming at the problem of strong reflection and multiple reflection in 3D measurement of industrial shiny parts,a technology based on high-dynamic range N-step fringe projection profilometry and single pixel imaging were developed,which effectively solved the problems of point cloud missing and accuracy degradation.Two methods were used to measure standard gauge blocks.The root mean square error of method based on high-dynamic range N-step fringe projection profilometry is 0.0066 mm.The root mean square error of method based on single pixel imaging is 0.0046 mm.With the step standard as the target,the absolute accuracy verification experiment was carried out.The absolute deviation is less than 0.007 mm.The proposed method was used to measure aero-engine impeller,turbine blade,and carbon fiber structures.Experimental results demonstrated that the proposed method combining high dynamic range N-step fringe projection profilometry and single pixel imaging can avoid point cloud missing.The complete data can be obtained in both strong reflection and multiple reflection areas.The proposed method has realized accurate 3D measurement of industrial shiny parts.

关 键 词：三维测量 高光零件 强反光 多次反光 光栅投影 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程] TP391.41[自动化与计算机技术—计算机应用技术]