一种基于三维光学测量技术的固体火箭发动机喷管全场形貌测量方法

A Method for Measuring the Full-field Morphology of Solid Rocket Motor Nozzle Based on Three-dimensional Optical Measurement Technology

针对传统接触式测量手段存在的挤压误差、效率低等问题,提出基于外差式多频相移技术的非接触式三维光学形貌测量方法。在论述三维光学形貌测量原理的基础上,分析并设计了三维光学形貌测量方法的功能、工作过程和主要模块,阐述了外差式多频相移光学测量、海量密集点云的优化处理、大尺寸零件全方位精确测量等关键技术。通过该方法能够快速、准确建立固体火箭发动机喷管等零部件的三维数字化模型,为固体火箭发动机的检测及创新设计提供更丰富的基础数据。

To overcome the problems of extrusion error and low efficiency of traditional contact measurement methods,a non-contact three-dimensional optical morphology measurement method based on heterodyne multi-frequency phase shift technique is proposed.On the basis of discussing the principle of three-dimensional optical topography measurement,this paper analyzes and designs the function,working process and main modules of three-dimensional optical topography measurement method,and expounds the key technologies of heterodyne multi-frequency phase-shift optical measurement,optimization treatment of massive dense point cloud,and all-round accurate measurement of large-size parts.It can quickly and accurately establish the three-dimensional digital model of solid rocket engine nozzle and other parts,and provide more abundant basic data for the detection and innovative design of solid rocket engine.