金属微喷射诊断中脉冲X光照相图像面密度测量方法

景越峰; 康旭; 王维荣

doi:10.11884/HPLPB202537.250025

金属微喷射诊断中脉冲X光照相图像面密度测量方法

doi: 10.11884/HPLPB202537.250025

中国工程物理研究院流体物理研究所，四川绵阳 621900

基金项目: 冲击波物理与爆轰物理全国重点实验基金项目(2024CXPTGFTT06411)

详细信息

作者简介:
景越峰，ifpjyf@sina.com

中图分类号: TP391
计量
- 文章访问数: 233
- HTML全文浏览量: 92
- PDF下载量: 20
- 被引次数: 0
出版历程
- 收稿日期: 2025-02-15
- 修回日期: 2025-05-16
- 录用日期: 2025-04-24
- 网络出版日期: 2025-06-05
- 刊出日期: 2025-07-26

Measurement method for areal density of pulsed X-ray photographic images in metal ejection diagnosis

Institute of Fluid Physics, CAEP, Mianyang 621900, China

摘要

摘要: 提出了一种基于对比标定的微喷射X光图像面密度数据测量方法，该方法通过中值滤波来减小白斑噪声的影响，利用空场图像来校正光场分布及探测器响应的不均匀性问题，通过对Roll-Bar客体的成像获取系统点扩展函数，并利用成像系统点扩展函数及基于改进的Tikhonov正则化的图像复原方法来减小模糊对X光图像的影响。给出了获取微喷射X光图像面密度信息的处理流程，对静态客体实验图像面密度反演的验证表明，提出的面密度测量方法可以较准确地获取金属微喷射实验X光图像面密度信息。
- 微喷射 /
- 面密度测量 /
- 脉冲X光照相 /
- Roll-Bar法 /
- 图像复原
Abstract: The ejection phenomenon generated by metal materials under strong impact is an important issue in the field of impact compression research. Pulsed X-ray photography is an important diagnostic testing method for micro jet processes. The use of X-ray images to obtain the surface density of metal material experimental objects and jets under strong impact is an important objective of this type of experiment. A method for measuring the areal density data of ejection X-ray images based on stepped wedges is proposed. The method reduces the influence of white spot noise by median filtering, corrects the unevenness of light field distribution and detector response by using empty field images and obtains the system point spread function by imaging the Roll-Bar object, and uses the imaging system point spread function and an improved Tikhonov regularization based image restoration method to reduce the impact of blur on X-ray images. The processing flow for obtaining the areal density information of ejection X-ray images is provided. The verification of the inversion of areal density in static object experimental images shows that the proposed method can accurately obtain the areal density information of metal ejection experimental X-ray images.
- ejection /
- areal density diagnosis /
- pulsed X-ray radiography /
- Roll-Bar method /
- image restoration

HTML全文

图 1 Roll-Bar法成像布局简图

Figure 1. Sketch of Roll-Bar layout

下载: 全尺寸图片幻灯片

图 2 点扩展函数网格示意图

Figure 2. The cross section of the object

下载: 全尺寸图片幻灯片

图 3 Roll-Bar 法实验图像

Figure 3. Image of Roll-Bar

下载: 全尺寸图片幻灯片

图 4 实验图像点扩展函数测量结果

Figure 4. Measurement results of point spread function of experimental images

下载: 全尺寸图片幻灯片

图 5 静态实验图像及其标记块客体反演结果面密度平均相对误差

Figure 5. Experimental images and average relative error of area density of stepped wedges

下载: 全尺寸图片幻灯片

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