...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>NDT & E international >Modelling of a high resolution digital radiographic system and development of a filtering technique based on wavelet transforms
【24h】

Modelling of a high resolution digital radiographic system and development of a filtering technique based on wavelet transforms

机译：高分辨率数字射线照相系统的建模和基于小波变换的滤波技术的发展

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The first part of this paper describes a geometrical model of an iron cast object with a number of simple defects included in the volume. This model, together with a model of a specific digital X-ray system and procedure, is used to generate a simulated radiograph of the volume. This is then employed in the development of a filtering technique that extracts the grey-level information related to the existence of anomalies in the object. The wavelet-technique is applied in two different ways in order to identify the large-scale of a matrix (i.e. a radiograph). It turns out that both methods are able to remove the geometrical based information from the greyscale in the simulated radiographs. The techniques are also verified with real radiographs taken from a number of welds and iron cast objects with different kinds of defects and defect sizes. The high-resolution digital X-ray system is able to detect defects less than one percentage of the object-thickness in the range of 25-60 mm steel. The developed filtering technique is proven to enhance the detection of defects in objects with geometrical variations and has a potential to reduce time-consuming analysis of radiographs.
机译：本文的第一部分描述了一个铸铁物体的几何模型，其中包含许多简单的缺陷。该模型与特定数字X射线系统和过程的模型一起用于生成体积的模拟X射线照片。然后将其用于过滤技术的开发中，该技术提取与对象中异常的存在有关的灰度信息。小波技术以两种不同的方式应用，以识别大型矩阵（即射线照片）。事实证明，这两种方法都能够从模拟X射线照片的灰度中删除基于几何的信息。该技术还通过从许多具有不同种类和缺陷尺寸的焊缝和铸铁物体上拍摄的真实射线照相进行了验证。高分辨率数字X射线系统能够检测出在25-60 mm钢范围内小于物体厚度百分之一的缺陷。事实证明，开发的过滤技术可以增强对几何变化对象的缺陷的检测，并有可能减少对射线照片的分析工作。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号