空气耦合超声检测中脉冲压缩方法的参数选优

周正干; 马保全; 孙志明; 周晖; 黄姿禹; 刘晶晶

doi:10.13700/j.bh.1001-5965.2014.0037

空气耦合超声检测中脉冲压缩方法的参数选优

doi: 10.13700/j.bh.1001-5965.2014.0037

1.
北京航空航天大学机械工程及自动化学院, 北京 100191
2. 上海飞机制造有限公司航空制造技术研究所, 上海 200436

基金项目: 国家商用飞机制造工程技术研究中心创新基金资助项目(SAMC13-JS-15-022);航天科技创新基金资助项目(CASC06)

详细信息

通讯作者:
周正干(1967-),男,湖南湘潭人,教授,zzhenggan@buaa.edu.cn,主要研究方向为超声无损检测技术.

中图分类号: TB553
计量
- 文章访问数: 1258
- HTML全文浏览量: 162
- PDF下载量: 625
- 被引次数: 0
出版历程
- 收稿日期: 2014-01-19
- 网络出版日期: 2015-01-20

Parameter optimization of pulse compression method in air-coupled ultrasonic testing

1.
School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
2. Institute of Aeronautical Manufacturing Technology of Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 200436, China

摘要

摘要: 多种脉冲压缩方法已成为提高空气耦合超声检测信号信噪比(SNR)的有效手段,而实际使用中面临如何选取合适参数以获得更好压缩效果的问题.基于脉冲压缩技术的基本原理及其在超声检测中的实现,建立了具备超声信号脉冲压缩实时处理的空气耦合超声检测系统.使用窄带空气耦合超声换能器分别就线性调频、非线性调频及相位编码脉冲压缩方法的关键参数对压缩效果的影响开展了实验研究,获得了脉冲压缩参数选取准则.最后以模拟缺陷的蜂窝夹芯复合材料试样为对象,验证了参数选优后的脉冲压缩方法在空气耦合超声检测中的应用效果.
- 脉冲压缩方法 /
- 空气耦合超声 /
- 无损检测 /
- 参数选优 /
- 信噪比
Abstract: A variety of pulse compression methods are viewed as viable solutions to improve the signal to noise ratio (SNR) of received signal in air-coupled ultrasonic testing. However, the use of corresponding method to realistic inspection is faced with problem of optimal parameter selection to get better compression effect. Based on the basic principle of pulse compression method and its implementation in ultrasonic testing, an air-coupled ultrasonic testing system with function of real-time pulse compression processing of ultrasonic signal was established. The impact of key parameters of linear frequency modulation, nonlinear frequency modulation and phase coded pulse compression method on compression effect in narrow-band air-coupled ultrasonic transducer was analyzed, respectively, and then the optimal parameter selection criteria was acquired. Finally, the corresponding pulse compression method of optimized parameters was verified in air-coupled ultrasonic inspection of a honeycomb sandwich composite sample with simulated defects.
- pulse compression method /
- air-coupled ultrasound /
- nondestructive testing /
- parameter optimization /
- signal to noise ratio

HTML全文

参考文献(15)

[1]	Bhardwaj M C,Stead G F.High frequency non-contact ultrasonic analysis of materials:introduction and applications[J].Nondestructive Evaluation of Materials and Composites V,2001,4336:117-128.
[2]	Imielinska K,Castaings M,Wojtyra R,et al.Air-coupled ultrasonic C-scan technique in impact response testing of carbon fibre and hybrid:glass,carbon and Kevlar/epoxy composites[J].Journal of Materials Processing Technology,2004,157:513-522.
[3]	Tat H,Georgeson G,Bossi R.Evaluation of air coupled ultrasound for composite aerospace structure[J].AIP Conference Proceedings,2009,1096(1):912-919.
[4]	Rao N,Mehra S.Medical ultrasound imaging using pulse compression[J].Electronics Letters,1993,29(8):649-651.
[5]	Pallav P,Hutchins D A,Yin X K.Air-coupled ultrasonic spectroscopy of highly damping materials using pulse compression[J].IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control,2009,56(6):1207-1217.
[6]	Lam F,Szilard J.Pulse compression techniques in ultrasonic non-destructive testing[J].Ultrasonics,1976,14(3):111-114.
[7]	周正干,魏东,向上.线性调频脉冲压缩方法在空气耦合超声检测中的应用研究[J].机械工程学报,2010,46(18):24-28.Zhou Z G,Wei D,Xiang S.Application of linear-frequency-modulation based pulse compression in air-coupled ultrasonic testing[J].Chinese Journal of Mechanical Engineering,2010,46(18):24-28(in Chinese).
[8]	魏东,周正干.改进的非线性调频脉冲压缩方法在空气耦合超声检测中的应用[J].机械工程学报,2012,48(16):8-13.Wei D,Zhou Z G.Application of non-linear frequency-modulation based pulse compression in air-coupled ultrasonic testing[J].Journal of Mechanical Engineering,2012,48(16):8-13(in Chinese).
[9]	Laurence R W,Martin D F.Practical spread spectrum pulse compression for ultrasonic tissue imaging[J].IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control,1998,45(2):349-355.
[10]	Sato R,Shinriki M.Time sidelobe reduction technique for binary phase coded pulse compression[J].Electronics and Communications in Japan,Part I:Communications(English Translation of Denshi Tsushin Gakkai Ronbunshi),2001,84(12):52-60.
[11]	蔡凤丽.相位编码信号脉冲压缩旁瓣抑制技术研究[D].南京:南京理工大学,2009.Cai F L.Research on side-lobe suppression for phase encoding signal[D].Nanjing:Nanjing University of Science and Technology,2009(in Chinese).
[12]	Gan T H,Hutchins D A,Billson D R,et al.The use of broadband acoustic transducers and pulse-compression techniques for air-coupled ultrasonic imaging[J].Ultrasonics,2001,39(3):181-194.
[13]	Chen W H,Deng J L.Ultrasonic non-destructive testing using barker code pulse compression techniques[J].Ultrasonics,1988,26(1):23-26.
[14]	Sun G M,Liu G S,Gu H.Signal analysis and processing for random binary phase coded pulse radar[J].Journal of Systems Engineering and Electronics,2004,15(4):520-524.
[15]	周谊珉.雷达信号分析技术与软件设计[D].南京:南京大学,2012.Zhou Y M.Radar signal analysis technology and software design[D].Nanjing:Nanjing University,2012(in Chinese)