摘要
实验结果表明,超声层析成像技术可以检测出碳纤维复合单向板中的冲击缺陷,但是在重建成像过程中由于碳纤维复合单向板本身的材料各向异性,给缺陷图像重建结果带来大量伪影。提出一种超声层析成像技术应用于碳纤维复合单向板缺陷检测过程中减少伪影的方法,根据兰姆波在碳纤维复合单向板各个方向的传播速度,对兰姆波走时数据进行修正从而达到减少伪影的目的。结果表明,重建图像通过走时修正,其缺陷位置偏离误差得到降低,伪影大大减少,成像质量明显提高。
The results show that impact defects in carbon fiber-reinforced unidirectional laminates can be detected by ultrasound tomography.But some artifacts have been brought by the anisotropy of composite materials in image reconstruction.A timeof-flight data revising method based on the velocities of Lamb waves propagating in the carbon fiber-reinforced unidirectional laminates along different directions had been proposed to decrease these artifacts.It shows that deviation error is decreased,artifacts are less and the quality of reconstructed images is improved by data revising.
作者
黄晶
梁巍
陈亮
HUANG Jing;LIANG Wei;CHEN Liang(School of Electronic and Computer Information Engineering,Ningbo University of Technology,Ningbo,Zhejiang 315016,China;School of Mechatronics Engineering,University of Electronic Science and Technology of China,Chengdu,Sichuan 611731,China)
出处
《企业技术开发》
2019年第5期4-8,26,共6页
Technological Development of Enterprise
基金
浙江省自然科学基金“管道超声传感器阵列检测损伤特征提取理论与方法研究”(LY15F010006)
中国博士后基金“海量超声信号结构正交自适应压缩感知理论研究”(145067)
关键词
超声层析成像
碳纤维复合单向板
兰姆波
走时修正
扇形束投影
无损检测
Ultrasound tomography
Carbon fiber-reinforced unidirectional laminates
Lamb waves
Time-of-flight data revising
Fan-beam projection
Nondestructive testing
