橡胶-钢粘接结构的谐振超声编码检测方法

doi:10.3901/JME.2020.20.022

机械工程学报 ›› 2020, Vol. 56 ›› Issue (20): 22-27.doi: 10.3901/JME.2020.20.022

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橡胶-钢粘接结构的谐振超声编码检测方法

王强^1,2, 毛捷^1,2, 李威³, 廉国选¹

1. 中国科学院声学研究所声场声信息国家重点实验室北京 100190;
2. 中国科学院大学北京 100049;
3. 武汉武船计量试验有限公司武汉 430060

收稿日期:2019-08-02 修回日期:2020-03-11 出版日期:2020-10-20 发布日期:2020-12-18
作者简介:王强,男,1991年出生,博士研究生。主要研究方向为信号与信息处理。E-mail:wangqiang538@mail.ioa.ac.cn;毛捷(通信作者),女,1969年出生,博士,研究员,硕士研究生导师。主要研究方向为超声检测及其信号处理。E-mail:maojie@mail.ioa.ac.cn
基金资助:
中国科学院创新基金资助项目(CXJJ-16Z220)。

Resonant Ultrasonic Coded Method for Rubber-steel Bonded Structure

WANG Qiang^1,2, MAO Jie^1,2, LI Wei³, LIAN Guoxuan¹

1. State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190;
2. University of Chinese Academy of Sciences, Beijing 100049;
3. Wuhan WUCHUAN Measurement & Test Co., Wuhan 430060

Received:2019-08-02 Revised:2020-03-11 Online:2020-10-20 Published:2020-12-18

摘要/Abstract

摘要： 针对橡胶-钢粘接结构进行脱粘检测,提出具有高检测灵敏度的谐振超声编码检测方法,区别于传统脉冲压缩后取包络成像的方法,谐振超声编码检测方法需要利用载频信息增强特征信号的能量。该方法从频域角度分析,首先确定换能器与编码信号的中心频率选择在钢层谐振频率附近,然后根据线性调频信号与Barker码的旁瓣抑制特点选择特征信号的区间进行脉冲压缩。结果表明,线性调频信号与Barker码相对于传统方波激励的脱粘检测灵敏度有了显著的提高,Barker码相对于线性调频信号具有更可控的旁瓣抑制范围,线性调频信号的带宽具有更灵活的选择范围。

关键词: 粘接结构, 高衰减, 编码信号, 脉冲压缩, 信噪比

Abstract: For debonding detection of rubber-steel bonded structure,a resonant ultrasonic coded detection method with high detection sensitivity is proposed. It is different from the traditional method of envelope imaging after pulse compression. The resonant ultrasonic coded detection method needs to use carrier frequency information to enhance the energy of the characteristic signal. The method is analyzed in frequency domain. Firstly,the center frequency of transducer and coded signal is chosen near the resonance frequency of steel layer,and then the interval of characteristic signal is selected for pulse compression according to the side lobe suppression characteristics of chirp signal and Barker code. The results show that the debonding detection sensitivity of chirp signal and Barker code is significantly higher than that of the traditional square wave excitation,the sidelobe suppression range of the chirp signal is more controllable than that of the chirp signal,and the bandwidth of the chirp signal is more flexible.

Key words: bonded structure, high attenuation, coded signal, pulse compression, signal-to-noise ratio

中图分类号:

TB553

王强, 毛捷, 李威, 廉国选. 橡胶-钢粘接结构的谐振超声编码检测方法[J]. 机械工程学报, 2020, 56(20): 22-27.

WANG Qiang, MAO Jie, LI Wei, LIAN Guoxuan. Resonant Ultrasonic Coded Method for Rubber-steel Bonded Structure[J]. Journal of Mechanical Engineering, 2020, 56(20): 22-27.

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橡胶-钢粘接结构的谐振超声编码检测方法

Resonant Ultrasonic Coded Method for Rubber-steel Bonded Structure

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