面向航空铸造叶片检测的线激光传感器设计与实现

Line Laser Sensor Design and Implementation for Aeronautic Casting Blade Detection

航空涡轮叶片是航空发动机的核心部件之一,内部结构复杂,铸造精度要求髙,传统接触式三坐标检测或人工卡板检测效率低下,难以满足叶片全检需求。设计了一款面向航空铸造涡轮叶片检测用线激光传感器,建立了线激光三角测量数学模型,通过控制变量法优化传感器结构参数,实验测试证明双球距离精度可达0.02 mm.本文设计的线激光测量传感器,可推广应用于航空铸造叶片型面检测、核电锻造叶片余量检测与变形矫正等,具有广泛的应用前景。

Aeronautic turbine blade is one of the key components of aero-engine with complicated internal structure and high precision of casting, but traditional contact coordinate measuring or manual profiling measuring is slow and cannot meet inspection efficiency for all products. In this article a laser scanning sensor is designed for inspecting aeronautic casting turbine blade. A triangulation mathematical model of laser scanning is established, which is used to optimize the sensor configuration parameters by controlling variables. It proves that the distance accuracy of double ball is up to 0.02ram. The laser scanning sensor can be extensively applied into the inspection of aeronautic casting blade, margin detection and deformation correction of nuclear power forged blade.