基于频闪激光光栅条纹的发动机叶片曲面测量  

Surface Measurement of Engine Blade Based on Stroboscopic Laser Grating Stripes

作　　者：石培杰 杨国威 王以忠[1] 陈莹 SHI Peijie;YANG Guowei;WANG Yizhong;CHEN Ying(College of Electronic Information and Automation,Tianjin University of Science&Technology,Tianjin 300222,China)

机构地区：[1]天津科技大学电子信息与自动化学院,天津300222

出　　处：《天津科技大学学报》2020年第4期70-74,共5页Journal of Tianjin University of Science & Technology

基　　金：国家自然科学基金资助项目(51805370)。

摘　　要：航空发动机叶片的点云数据三维重建是叶片加工和修复的必要步骤,为此提出一种基于频闪激光光栅条纹的叶片曲面重构方法.频闪激光光栅投射装置投射出的光栅条纹具有高精度、高分辨率和高亮度的特性,且条纹刷新快.使用相位–高度测量模型,通过标定得到频闪激光光栅投射装置到相机的距离和到参考平面的距离.首先,用量块的高度测量实验,验证了测量系统的精度,均方根误差(RMSE)为0.07 mm;其次,实现发动机叶片曲面的测量.实验结果表明:将频闪激光光栅条纹用于叶片曲面测量可以得到很好的重构效果.Three-dimensional reconstruction of point cloud data of aero-engine blades is a necessary step for blade machining and repair.To this end,a method of blade surface reconstruction based on stroboscopic laser grating stripe is proposed.The grating stripe projected by the stroboscopic laser grating projection device has high precision,resolution and brightness,and the stripe refreshes quickly.Using a phase-height measurement model,the distance from the stroboscopic laser grating projection device to both the camera and the reference plane was obtained by calibration.The accuracy of the measurement system was verified by the height measurement experiment of the gauge block,the RMSE was 0.07 mm,and the measurement of the engine blade surface was realized.The experimental results show that the stroboscopic laser grating fringe can be well reconstructed for the blade surface measurement.

关 键 词：频闪激光光栅条纹 发动机叶片 曲面测量 

分 类 号：TN919[电子电信—通信与信息系统] TH862[电子电信—信息与通信工程]