航空发动机扇形段叶片表面缺陷测量系统

Surface Defect Measurement System of Aero-engine Sector Blade

针对航空发动机叶片缺陷检测过程中,扇形段叶片间隙狭小且表面缺陷尺度小、形态差异大,位置隐蔽,常规测量方法无法实现检测的问题,基于改进的结构光测量原理,通过压缩光路空间体积,设计了微型线结构光视觉传感器。搭建了航空发动机扇形段叶片表面缺陷测量系统,设计了六轴联动控制结构,通过运动分解简化了机械控制结构,避免了由于插补控制引入的非线性运动误差。实验证明系统具有较高精度,实现了航空发动机扇形段叶片表面缺陷高精度测量。

In the process of aero-engine blades defect detecting,in view of the narrow gap of the aero-engine segment blades,small surface defect,large shape difference,hidden position and conventional measurement means cannot realize detection,based on the improved structured light measurement principle,by compressing the optical path space volume,a miniature vision sensor was designed.An aero-engine blade surface defect measurement system in sector segment was built,and a six-axis linkage control structure was designed.The mechanical control structure was simplified by motion decomposition,and nonlinear motion errors introduced by interpolation control were avoided.Experiments show that the system has high precision,and realizes high-precision measurement of surface defects of aero-engine sector blades.