【作者】 张艳清；

【导师】 周灿丰；

【作者基本信息】 北京化工大学 ， 机械电子工程， 2012， 硕士

【摘要】 随着现代工业技术的不断发展,对焊接的质量要求也越来越高。传统的焊接技术一般都依靠焊接电压或是电流对焊接质量进行控制，这样只能够通过焊接过程中的反馈数据来间接分析焊接质量。可是为了能够更加直观的去分析焊接质量，本文介绍并研究了遥控焊接视觉监视系统，主要围绕着硬件系统、软件系统以及监控结果进行理论的分析与研究。硬件设计部分主要是根据实验的具体要求，选择合适的CCD以及图像采集卡，并分析了CCD的成像原理以及相应的特征参数。除此之外，为了克服TIG焊接过程中电弧的光照强度以及连续的光谱，还使用了光谱仪对TIG焊接电弧进行采样并分析光谱成分，从而选取合适的波片。软件设计部分主要是基于LabVIEW软件开发平台编写的一套图像采集与图像处理程序。在设计过程中，为了满足焊接监控过程中能够清楚的看到电弧与熔池，引入了低通滤波、二值化、边缘提取等图像处理算法。除此之外，为了确定电弧与熔池的相对位置以及能够保存监控图像信息，还增加了边缘定位模块以及监控录制模块。本文主要是对TIG焊接电弧进行监控，主要是通过该套监控设备监控TIG焊接电弧的形态变化，并且通过相应的边缘提取算法来提取TIG焊接电弧的有效信息，通过提取的数据进一步分析焊接过程中电弧与焊缝的相对位置。更多还原

【Abstract】 With the continuous development of modern industrial technology,the welding quality requirement becomes more and more perfect.Traditional welding techniques generally controls the welding qualityrelying on welding voltage or current, so the operators analyze indirectlythe welding quality through the feedback data in the welding process.However, in order to analyze the welding quality more intuitively, thisarticle describes remote welding vision system, which analyzes andresearch around the hardware systems, software systems and themonitoring results.The part of hardware design mainly selects the appropriate CCD andimage acquisition card, and analyze the CCD imaging principle andcorresponding characteristic parameters based on the specificrequirements of experiment. In addition, in order to overcome the arclight intensity and continuous spectrum of TIG welding, this choosesappropriate pieces through analyzing spectrum.The part of software mainly composes a set of image acquisition and processing program based on LabVIEW software platform. In the designprocess, in order to see clearly the arc and welding pool, this introducesthe low-pass filtering, binarization, edge extraction and image processingalgorithms. In addition, in order to determine the relative position of thearc and welding pool as well as save the monitoring image information,this article increases the edge of positioning module and monitors therecording module.This article mainly monitors the TIG welding arc through themonitoring equipment, as well as extracts effective information of TIGwelding arc through edge extraction. And then, it further analyzes therelative position of arc and weld in the welding process through extracteddata.更多还原