基于激光三维扫描技术的微型轴流血泵叶轮加工精度检测

摘要

目的 检测微型轴流血泵的转子叶轮加工精度,建立叶轮形状复杂的微型血泵叶轮加工精度检测方法.方法 本文采用激光三维扫描技术获得FW -2型轴流血泵叶轮的点云,利用逆向工程软件Geomagic Studio对点云进行处理后建立三维模型.将建立的叶轮模型与设计的叶轮模型导入Geomagic Qualify软件进行对比,即可分析具有复杂曲面的FW-2型轴流血泵转子叶轮各个型面的加工精度.结果 对比激光扫描得到的叶轮模型与设计的叶轮模型,结果显示FW -2型轴流血泵转子叶轮整体加工精度符合要求,只有极小区域加工精度较低.结论 激光三维扫描结合逆向三维建模技术是微型血泵复杂叶轮的加工精度检测的有效方法.本研究为微型血泵叶轮检测提供了一种新思路,对确定血泵使用过程中的血栓形成原因,改进血泵设计具有重要意义.%To detect the machining precision of the rotor impeller in the micro-axial blood pump. To establish the method to detect the machining precision of the micro-axial blood pump with complex blade profiles. Methods Firstly, we got the point cloud of the impeller based on 3D laser scanning technology in this paper. Then we built the three dimensional model of the impeller using the point cloud dealt with Geomagic Studio Microsoft. The two impeller models we built and we designed were imported into the Geomagic Qualify Microsoft and were compared. Then we analyzed the machining precision of all rotor impeller surfaces of the FW- 2 type blood pump whose rotor had complex surfaces. Results The overall machining precision of the FW- 2 type blood pump impeller satisfied our demands and only a small region on the impeller surfaces was of lower machining precision. Conclusions The technology that 3D-laser scanning combined with reversing 3D modeling is an effective method to detect complex impeller of micro blood pump. This research supplies a new thought for the machining precision detection of micro blood pump impeller and is of great importance to confirm the cause of thrombus to improve the pump design.