航空金属薄板分层缺陷的频率-波数域超声相控阵全聚焦法成像检测  

Frequency-wavenumber domain ultrasonic phased array total focusing method imaging detection for delamination defect of aviation metal sheet

作　　者：钟芳桃 石文泽[1] 卢超[1,2] 陈果 沈佳卉[3] 胡婧 ZHONG Fangtao;SHI Wenze;LU Chao;CHEN Guo;SHEN Jiahui;HU Jing(Key laboratory of Nondestructive Testing of Ministry of Education,Nanchang Hangkong University,Nanchang 330063,China;School of Physics Electronic Information Engineering,Gannan Normal University,Ganzhou 341000,China;Power China Jiangxi Electric Power Construction Co.,Ltd.,Nanchang 330096,China)

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,南昌330063 [2]赣南师范大学物理与电子信息学院,赣州341000 [3]中国电建集团江西省电力设计院有限公司,南昌330096

出　　处：《无损检测》2021年第7期50-56,共7页Nondestructive Testing

基　　金：国家自然科学基金资助项目(12064001,51705231);江西省自然科学基金重点项目(20192ACBL20052)。

摘　　要：将超声相控阵频率-波数域全聚焦算法应用于304不锈钢金属薄板分层缺陷的检测中,采用两种型号的相控阵探头分别对厚度为1 mm和3 mm金属薄板的分层缺陷进行检测,比较了时域全聚焦和频率-波数域全聚焦两种算法的成像质量。结果表明:基于时域和频率-波数域的全聚焦算法均能够检测出金属薄板的分层缺陷,相对于传统时域全聚焦成像方法,频率-波数域全聚焦法成像检测具有分辨率高、伪像区域小等优点。In this paper, the ultrasonic phased array frequency-wavenumber domain total focusing method was applied to 304 stainless steel sheet metal layered defect detection. Two kinds of models of phased array probe were used, to detect 1 mm and 3 mm thickness of sheet metal layered defect, and the conventional time domain total focusing method and frequency-wavenumber domain total focusing method imaging quality of two kinds of algorithm were compared. The research results show that total focusing method algorithms based on time domain and frequency-wavenumber domain can detect layered defects of thin metal plates. As compared with conventional time domain total focusing method imaging, the frequency-wavenumber domain total focusing method imaging detection has high resolution, smaller artifact areas and other advantages.

关 键 词：航空金属薄板 分层缺陷 频率-波数域算法 全聚焦法成像 

分 类 号：TB559[理学—物理] TG115.28[理学—声学]