基于光电检技术的陶瓷表面粗糙度非接触测量.docVIP

PAGE 本科生毕业设计（论文） 基于光电检测技术的陶瓷表面粗糙度非接触测量 学 院： 电子与信息工程学院 专 业： 光信息科学与技术 二〇一二 年 六 月 PAGE I 摘 要 激光散斑测量是具有非接触、高精度和全场等优点，一直为人们所重视，尤其是被大量的应用于表面测量。随着机械加工自动化程度的提高，对表面粗糙度在线测量提出越来越高的要求，而激光散斑相关测量具有非接触、不划伤被测表面的优点，是一种理想的表面粗糙度在线测量方法。 本文阐述了表面粗糙度的定义、参数以及散斑的成因，重点对激光散斑测量表面粗糙度进行了理论分析，在此理论基础上，设计和组建了一套利用激光散斑在线测量陶瓷表面粗糙度的系统。该实验系统用相干偏振光以一定角度照射待测表面，用CMOS摄像头采集由待测表面所散射的散斑图像，利用Labview程序将散斑图像保存到计算机，再由MATLAB对该散斑图像进行图像数据处理，得出待测表面的粗糙度。 关键词：激光散斑；表面粗糙度；陶瓷；散斑图像 Non-contact Measurement of the Roughness of Ceramic Surface Based on the Photoelectric Detection Techniques LIN Ze-huan Abstract Laser speckle measurement is a widely used non-contact technique with high precision, especially in surface measurement. With the rising of the automation degree in manufacturing, the online measurement of the surface roughness is required in industry. Laser speckle correlation is a non-contact technique, and is a ideal method for online measurement of surface. This thesis introduces the definition of surface roughness, parameters and the causes of the speckle, and focuses on laser speckle surface roughness measurement theory analysis. A experimental laser speckle system is designed and set up for online measurement of ceramic surface roughness. a coherent polarized light with a certain angle illuminates the surface of samples, and a CMOS camera is used for collection the speckle image, which is transferred to a computer by use of Labviwe. The surface roughness is obtained by calculating the contrast of the speckle images with Matlab. Key words: Laser speckle;Surface roughness;Ceramic;Speckle image 目 录 TOC \o 1-3 \t 样式1,1,样式2,2,样式3,3 \h HYPERLINK \l _Toc19557 1. 绪论 PAGEREF _Toc19557 1 HYPERLINK \l _Toc10632 1.1 引言 PAGEREF _Toc10632 1 HYPERLINK \l _Toc17290 1.2 表面粗糙度测量技术综述 PAGEREF _Toc17290 1 HYPERLINK \l _Toc5747 1.2.1 表面粗糙度测量技术 PAGEREF _Toc5747 1 HYPERLINK \l _Toc23390 1.2.2 表面粗糙度测量技术的发展趋势 PAGEREF _Toc23390 2 HYPERLINK \