【作者】 王博；

【导师】 刘铁根；

【作者基本信息】 天津大学 ， 光电子技术， 2012， 硕士

【摘要】 用于材料表面处理的激光扫描技术,以其非接触性、高精度、高效率、控制灵活,以及处理后材料出现新的物理和化学性质等特点,被广泛地应用于工业制造、国防科技和科学研究中。随着激光技术的发展,以及加工材料丰富性和处理要求的不断提高,材料表面激光扫描技术已经从原有的二维平面单一功能的扫描技术,朝着高精度、多维度、自动控制、拓展应用外延等方向发展。三维立体材料的表面扫描技术,逐渐成为激光扫描技术研究的热点。针对立体材料的表面扫描,在国内基于动态聚焦镜的三维曲面扫描研究的基础上,我们提出了各表面三维扫描,多面体旋转拼接的方法,五轴控制激光光斑的运动,实现三维材料多表面扫描的自动化控制,提高材料整体的扫描效率,并实现工业化的自动控制水平。论文的主要工作包括:1、对激光与物质相互作用原理,及其物理和化学机制进行探讨;根据分子振动模型,分析了材料在不同激光参数照射下扫描效果不同的原理和规律,为材料扫描的实验提供了理论依据;2、选用Nd:YAG全固态激光器为五轴立体扫描系统的光源,与声光Q调制器、振镜组、动态聚焦镜、f-theta透镜组成了三维光学扫描系统,双工位高速转盘和旋转伺服电机完成多面体的自动拼接。电源主控箱的设计,实现了对系统各部分的电气监控,并增强了整机的安全性及操作易用性;3、基于振镜组的RTC4控制卡,和伺服电机6030运动控制卡的动态链接库、OpenGL函数库等,五轴立体激光扫描控制软件实现了扫描图形的读取与设计、激光焦点三维控制、多面体旋转拼接控制、系统参数的设置、操作交互性等功能需求,完成软硬件联调;4、对于系统的重要参数进行稳定性分析和误差排除,完成了系统稳定性的改进和标定;对金属络合物材料激光改性实验的物理化学机理进行微观实验分析及验证,并对改性参数的改进提供了可靠依据;进行了材料扫描在终端设备射频电路上的应用实验,取得了较好的效果,并得到了激光扫描的最佳参数。更多还原

【Abstract】 The technology of laser scanning for material surface treating, is widely applied in industry manufacture, defense industry and science research, in that it has the feature of noncontact, high precision and efficiency, flexible control method, and the new physical and chemical property after surface modification. As the technology of laser develops, and at the same time, the complexity of material and treating requirement increase, the technology of material surface laser scanning has developed over the status of two-dimension scanning with simple single scanning function. The new development is directed to the feature of high precision, multi-dimension, automatic control and application extension.Technology of laser scanning on 3D material surface, has developed into the hot issue of laser processing. For 3D material surface, based on the domestic research of 3D surface scanning with dynamic focusing lens, we proposed the method of scanning 3D surface individually, splicing the individual pattern by whirling motor. The five axis system control laser spot, in order to achieve the automatic control of multi-surface scanning of material. This method and system increase the efficiency of material scanning, and the level of industrial automation. The main content of the essay is:1 The introduction of principle of interaction between laser and material, and the mechanism of physical and chemical changes is indicated. According to molecular vibration module, the principle of scanning effect under different laser parameter is analyzed, which provides the theoretical foundation of experiments.2 Nd:YAG solid-state laser is chosen to be the laser source of system. Q modulator, galvanometers, dynamic focusing lens f-theta lens, together with laser source, makes up the 3D scanning system. Double-position high speed rotating plate and whirling serve motor together contribute to the multi-surface scanning automatic splicing. Power control box monitors and control the power supply of every composition, which enhance the security and efficiency of system.3 Based on the dynamic link library of RTC4 control card, serve motor 6030 control card and OpenGL, the system software achieve the function of reading DXF files, control of laser spot, control of multi-surface splicing, setting of system parameter, interactivity. The debugging of software is completed. 4 The analysis of stability and error correction for significant parameter is completed, in order to improve the stability level of system. The experiments analysis and verification for physical and chemical changes principle of metal complex is done, which provides the foundation for improvement of modification parameters. Radio frequency circuit experiments based on the modified metal complex is carried out. The experiments come out with good effects, and the optimum parameter for experiments is analyzed.更多还原