摘要
高密度聚乙烯管广泛用于燃气输送等领域,其热熔接头的焊接质量直接影响管道系统的安全。采用全聚焦成像方法对高密度聚乙烯试块的横通孔缺陷进行成像实验,通过对检测信号进行信号预处理,提高全聚焦成像的效果,并提出一种基于半稀疏矩阵采集的超声阵列全聚焦成像方式,将该方式与基于全矩阵、半矩阵和稀疏矩阵采集方式的全聚焦成像结果进行比较。实验结果显示,基于半稀疏矩阵采集的全聚焦成像方法可有效降低计算量,提高实时检测效率,同样能够用于高密度聚乙烯材料中横通孔缺陷的重构且成像信噪比无明显降低。
High density polyethylene pipes are widely used in the field of gas delivery,and the welding quality of the butt fusion joint directly affects the safety of the pipe system.Imaging experiments of the side-drilled hole defects of high density polyethylene test blocks are performed by using the total focusing method.The imaging effect and quality are improved by signal preprocessing,and a total focus imaging method of ultrasonic array based on half sparse matrix capture is proposed and compared with total focus imaging results obtained by total matrix,half matrix and sparse matrix capture.The result show that the total focus imaging method based on half sparse matrix capture can effectively reduce the amount of calculated data and improve the on-site real-time detection efficiency.It can also be used for the reconstruction of side-drilled hole defects in high-density polyethylene materials without significantly reducing the signal to noise ratio of image.
作者
谢世杰
王强
许卫荣
胡栋
陈涛
XIE Shijie;WANG Qiang;XU Weirong;HU Dong;CHEN Tao(College of Quality and Safety Engineering,China Jiliang University,Hangzhou 310018,Zhejiang,China;Huzhou Special Equipment Inspection and Research Institute,Huzhou 313000,Zhejiang,China;Taian Special Equipment Inspection and Research Institute,Tai'an 271099,China;Hangzhou Special Equipment Inspection and Research Institute,Hangzhou 310051,Zhejiang,China)
出处
《声学技术》
CSCD
北大核心
2023年第3期314-320,共7页
Technical Acoustics
基金
浙江省重点研发计划(2022C03179)
浙江省市场监管局科技计划项目(20210144,20190325)。
关键词
高密度聚乙烯
全聚焦成像
超声阵列
半稀疏矩阵
信噪比
high density polyethylene
total focusing method
ultrasonic array
half sparse matrix
signal to noise ratio
作者简介
谢世杰(1996-),男,浙江台州人,硕士研究生,研究方向为超声无损检测;通信作者:王强,E-mail:qiangwang@cjlu.edu.cn。
