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摘要：本文主要研究自动光学检测机构中二维图像的采集与与之相关的机械结构相关设计。在自动光学检测机构中，我们运用机械传动的工作平台与CCD，协作完成二维图像的采集，采用远心镜头，运用远心镜头可以在一定的物距范围内，使得到的图像放大倍率不会变化的特性，完成图像的采集，并保证采集来的图像质量，使其能在电脑程序中被分析，工作平台需要能做到三维移动，通过C++6.0程序开发环境下开发的系统的自动控制程序，精确控制每次图像采集的坐标。通过对两者的控制完成对所需采集图像的精确掌控。收集的图像在后期过程中转为高对比度黑白，以更好的发现被测物的瑕疵，配合黑白图像，被测物的光照条件中，色温不予考虑，但光强要足够，满足在CCD在低感光度下也能获得亮度足够的图像，CCD感光度不能过高，因为在高感光度下CCD会产生噪点，影响电脑程序对特征的识别，此外，镜头的焦距应控制在一定范围内，避免产生畸变影响电脑程序的检测。在后期在电脑对被测物的分析中，即图像特征研究方面，我们通过理论分析以及相关的计算，研究并得到分数傅里叶变换相关识别性能。42400
毕业论文关键字： 光学检测，机械传动，三维工作台，CCD，特征识别
英文摘要 This paper studies automatic optical inspection agency acquired two-dimensional image of the mechanical structure associated with design-related. In automatic optical inspection mechanism, we use mechanical drive work platform with CCD, collaborate on a two-dimensional image acquisition, the use of telecentric lenses, telecentric lens can use a certain object distance within the range, the resulting image magnification is not will change the characteristics of complete image acquisition, and image quality to ensure the collection, so that it can be analyzed in a computer program, a work platform need to be able to do three-dimensional movement, through C ++ 6.0 development environment to develop a system automatic control program, the precise coordinates of each control image acquisition. By controlling both the completion of the required image acquisition precise control. Captured images into late in the course of high-contrast black and white, to better discover flaws measured object, with black and white images, lighting conditions measured object, the color temperature is not considered, but the light intensity to be enough to meet the CCD low sensitivity can be obtained sufficient brightness image, CCD sensitivity is not too high, because in the high sensitivity CCD result in noise impact of computer program identifies the feature, in addition, the focal length of the lens should be controlled within a certain range avoid distortion affect the detection of computer programs. In the late computer analysis of the measured object, that image feature research, we calculated the theoretical analysis and related research and get the fractional Fourier transform correlation properties.
目录
摘要 2
1绪论 1
1.1课题的背景和意义 1
1.2自动光学检测的各项技术与应用 2
1.3国内外自动光学检测系统的发展概况 3
1.4 课题的设计任务 4
2总体设计方案 4
2.1系统工作原理 4
2.2系统总体机构设计 5
2.2.1系统模块设计 5
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