• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (4): 19-24.doi: 10.3901/JME.2019.04.019

• 仪器科学与技术 • 上一篇    下一篇

超声检测三角矩阵聚焦成像算法

赵新玉1, 齐天之1, 王中亚2, 陈安生2   

  1. 1. 大连交通大学材料科学与工程学院 大连 116028;
    2. 中国大唐集团科学技术研究院有限公司华东分公司 合肥 230088
  • 收稿日期:2018-05-12 修回日期:2018-11-01 出版日期:2019-02-20 发布日期:2019-02-20
  • 作者简介:赵新玉,男,1979年出生,博士,副教授。主要研究方向为焊接、检测技术与装备,以主要完成人身份发表学术论文30余篇,其中SCI源刊10篇,EI源刊15篇。E-mail:xyz@djtu.edu.cn;齐天之,男,1992年出生。主要研究方向为超声无损检测技术。E-mail:935757267@qq.com
  • 基金资助:
    国家重点研发计划资助项目(2016YFF0203000)

Ultrasonic Detection Triangle Matrix Focus Imaging Algorithm

ZHAO Xinyu1, QI Tianzhi1, WANG Zhongya2, CHEN Ansheng2   

  1. 1. School of Material Science and Engineering, Dalian Jiaotong University, Dalian 116028;
    2. China Datang Corporation Science and Technology Research Institute Co., Ltd. East China Branch, Hefei 230088
  • Received:2018-05-12 Revised:2018-11-01 Online:2019-02-20 Published:2019-02-20

摘要: 超声相控阵技术近些年发展迅速并被广泛应用于工业无损检测领域,线阵探头全矩阵聚焦方法具有成像信噪比好、缺陷分辨力高等优势,近些年获得广泛研究,但其仍然存在采集数据量大、计算效率低的问题,使其在实际工业应用中受到限制。为了解决上述问题,基于检测系统收发通道的互易性提出三角矩阵聚焦成像算法,该方法简化了全矩阵聚焦成像算法的数据采集和成像运算过程。为验证聚焦成像方法的有效性,分别对类裂纹、平底孔和横通孔缺陷试块进行数据采集成像试验和信噪比分析,数据采集试验结果表明收发通道互换前后两信号具有很好一致性。进一步的数据比较分析表明,在成像质量方面,三角矩阵聚焦成像算法与全矩阵聚焦成像算法两者的图像信噪比变化不大;在数据采集和成像效率方面,三角矩阵聚焦成像算法降低了近一倍数据量,有效提高了计算效率。

关键词: 超声相控阵, 全矩阵聚焦, 三角矩阵聚焦, 无损检测

Abstract: Ultrasonic phased array technology has been developed rapidly in recent years and is widely used in industrial non-destructive testing. Full matrix focusing method has been widely researched and proved to be some advantages such as good signal to noise ratio and high resolution image, however, it still has some challenges in large amount data acquisition and processing, which limits its application in industry. In order to solve this kind of problem, a triangular matrix focusing algorithm is proposed based on the channel reciprocity of the transmitter and receiver. With the help of the triangular matrix focusing algorithm, both data acquisition and processing can be simplified. In order to prove the validity of this provided algorithm, the specimens with crack and flat-bottomed hole and side-drilled holes are used to test and analyze. It has been shown these signals are in good agreement by exchanging the transmitter and receiver. The signal-to-noise ratio of the image captured by the triangular matrix focusing algorithm coincide to those captured by full matrix focused method. At the same time both data acquisition and computational efficiency using the triangular matrix focusing algorithm have been improved significantly.

Key words: full matrix focusing, nondestructive testing, triangular matrix focusing, ultrasonic phased array

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