基于CCD图像的切屑形态参数检测技术研究
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摘要
本文对基于CCD图像的切屑形态参数检测技术进行了比较深入、系统的研究,开发了切屑形态参数图像检测系统,为估计和控制切屑的运动和形态进行了有益的探索和实践。
     本文的工作主要体现在以下几个方面:
     1.从研究切屑运动规律的数学模型出发,分析切屑形态参数检测系统对硬件系统和软件系统的要求,设计选用了相关硬件和软件;
     2.详细分析了24位真彩色图像的灰度化和图像模板匹配、切屑形态图像的边缘提取与分割等数字图像处理方法的理论和算法,详细讨论了用于刀片边缘轮廓直线检测的算法、切屑侧卷半径检测的圆检测算法以及流屑角的检测算法;
     3.利用VisualC++开发了Windows下的切屑形态参数图像检测系统应用程序。作为实验,在用C630普通车床车削外圆过程中进行图像采集,对其中15幅侧卷较为明显的切屑图像利用本图像检测系统进行分析处理,能够正确地精确检测出11幅图像的切屑形态参数,检测成功率达73%,检测精度达到象素级。这表明本文开发的图像检测系统基本上能够完成切屑形态参数的离线检测任务。
In this paper, the detection technique for geometric parameters of chip based on CCD
     image has been studied comprehensively and systematically. We have developed a
     corresponding image detection system for determination of geometric parameters of chip
     in order to estimate and control the movement and the shape of the chip.
    
     The main work in the paper is as follows:
    
     1. The mathematical model of movement of chip is investigated. Hardware and
     software of the image detection for geometric parameters of chip are designed and
     selected.
    
     2. Theories and algorithms for true-color-image's color quantization, image template
     matching, edge extraction and segmentation of chip image are analyzed in detail.
     Algorithms of detection for inserts?straight-line contour, chip's sideward-curl radius and
     chip flowing direction are discussed detailedly.
    
     3. By means of the developing language visual C++ a software has been developed
     for the image detection of geometric parameters of chip.
    
     As a test, images of chip are collected during turning process in C630. 15 images in
     which chip's sideward curl is apparent are chosen and processed with the developed
     software. The geometric parameters of chip are detected successfully in the 11 images,
     where the correct detection rate is about 73 percent and the detection accuracy is smaller
     than a pixel. It is shown that the image detection system is basically capable of detecting
     the geometric parameters of chip in off-line circumstance.
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