基于声阻变化率的船舶焊缝缺陷成像研究  

Study on Imaging of Weld Imperfection of Ships Based on Acoustic Impedance Rate

作　　者：曾碚凯[1] 李胜[1] 

机构地区：[1]沈阳工业大学信息科学与工程学院,辽宁沈阳110178

出　　处：《计算机与现代化》2009年第9期112-115,共4页Computer and Modernization

摘　　要：根据超声波的原理和物理特性,提出一种利用超声波检测船舶焊缝缺陷性质的新思路。根据声阻抗变化率,采用迭代重建算法重建焊缝缺陷的二维图像。将超声回波看成是从发射点到接收点的距离之和等于定长的点的轨迹,并对该轨迹的声阻变化率进行线积分。此方法能有效地提高超声成像的分辨率。According to the principles and physical characteristics of ultrasound, a new idea is put forward making use of ultrasonic to detect weld imperfection in shipbuilding. On the basis of the rate of acoustic impedance, an iterative reconstruction algorithm is used to rebuild the 2D image of weld defect. Considers ultrasonic echo as the point locus of the point that the distance between the launching point and defect point is equal to the distance between the defect point and the receiving point, and then has the line integral of the change rate of acoustic impedance. The method improves the resolution of ultrasonic imaging effectively.

关 键 词：声阻抗 图像重建 船舶焊缝 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]