安装工程中焊接探伤信息的计算机管理

焊接探伤信息管理工作在电力、石油、化工等行业中起着极其重要的作用,愈来愈受到各级部门的重视。焊接探伤不仅是工程全部或局部焊接质量的评估手段,更主要的是它能通过对局部或全部工程焊接探伤信息的统计分析,为各级管理人员及时提供准确可靠的质量信息,以便把握焊接新动向,控制安装过程中的焊接质量。

浅谈注水管道设计中试压与焊接探伤比例的确定

通过对中国标准(GB)和美国标准(ASME)及其他国外标准关于管道试验压力和无损检验规定的内容进行分析和对比,总结出在钢质注水管道设计过程中如何合理确定管道的试验压力和焊接探伤比例。

奥克兰海湾大桥焊接探伤研究

近几年,我国工程项目建设的步伐越来越快,海湾桥梁工程就是比较常见的工程项目类型,随着这类项目数量的不断增多,人们越来越关心焊接探伤的质量。为提高焊接探伤的质量,就需要加强探伤检测,而这就不得不应用一些先进的探伤检测工艺。在奥克兰海湾大桥项目建设的过程中,探伤项目的检测工作深受人们的重视。为加强探伤检测,主要采用了横向缺陷检测超声波检测补充工艺,经过缺陷判断以及工艺验证分析,取得了较好的焊接施工效果。

焊接工艺调整处理接头探伤出波问题研究

随着我国高速铁路的迅速发展,钢轨焊接接头探伤问题显得尤为重要。利用大数据分析了不同探伤问题,对于其中难以处理的过烧现象导致的大范围探伤出波问题进行了研究。结果表明:焊缝热量与过烧缺陷间存在反向关联,即随着焊接热量的增大,过烧型探伤缺陷的比例逐渐降低。因此,可以利用调整焊接工艺的方法减少此类问题的发生。

Development of Automatic Extraction Weld for Industrial Radiographic Negative Inspection

In industrial X-ray inspection, in order to identify weld defects automatically, raise the identification ratio, and avoid processing of complex background, it is an important step for sequent processing to extract weld from the image. According to the characteristics of weld radiograph image, median filter is adopted to reduce the noise with high frequency, then relative gray-scale of image is chosen as fuzzy characteristic, and image gray-scale fuzzy matrix is constructed and suitable membership function is selected to describe edge characteristic. A fuzzy algorithm is adopted for enhancing radiograph image processing. Based on the intensity distribution characteristic in weld, methodology of weld extraction is then designed. This paper describes the methodology of all the weld extraction, including reducing noise, fuzzy enhancement and weld extraction process. To prove its effectiveness, this methodology was tested with 64 weld negative images available for this study. The experimental results show that this methodology is very effective for extracting linear weld.