非金属管道损伤的非线性超声导波延时检测定位方法

洪晓斌; 冯进亨; 林沛嵩; 刘桂雄

doi:10.3788/OPE.20162407.1685

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非金属管道损伤的非线性超声导波延时检测定位方法

微纳技术与精密机械 | 更新时间：2020-08-13

- 非金属管道损伤的非线性超声导波延时检测定位方法
- Damage detection of nonmetallic pipe by using nonlinear ultrasonic guided wave with signal delay
- 光学精密工程 2016年24卷第7期页码：1685-1693
- 作者机构：
  
  华南理工大学机械与汽车工程学院, 广东广州 510640
- 作者简介：
  
  [ "洪晓斌(1979-), 男, 广东揭阳人, 教授, 博士生导师, 2002年于武汉理工大学获得学士学位, 2007年于华南理工大学获得博士学位, 主要从事无损检测技术与装备、网络化测控技术及仪器等方面的研究。E-mail:mexbhong@scut.edu.cn" ]
  刘桂雄(1968-), 男, 广东揭阳人, 教授, 博士生导师, 1990年于重庆大学获得学士学位, 1995年于重庆大学获得博士学位, 主要从事新型智能传感技术、网络化测控技术、制造过程质量检测、建模及控制等方面的研究。E-mail:megxliu@scut.edu.cn E-mail:megxliu@scut.edu.cn
- 基金信息：
  
  国家自然科学基金资助项目(51305141);广东省自然科学基金资助项目(2014A030313248);广州市科技计划项目(201607010171)
- DOI：10.3788/OPE.20162407.1685
  中图分类号： TB553
- 收稿日期：2016-03-20，
  
  录用日期：2016-4-15，
  
  纸质出版日期：2016-07
- 稿件说明：
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洪晓斌, 冯进亨, 林沛嵩, 等. 非金属管道损伤的非线性超声导波延时检测定位方法[J]. 光学精密工程, 2016,24(7):1685-1693.

Xiao-bin HONG, Jin-heng FENG, Pei-song LIN, et al. Damage detection of nonmetallic pipe by using nonlinear ultrasonic guided wave with signal delay[J]. Optics and precision engineering, 2016, 24(7): 1685-1693.
洪晓斌, 冯进亨, 林沛嵩, 等. 非金属管道损伤的非线性超声导波延时检测定位方法[J]. 光学精密工程, 2016,24(7):1685-1693. DOI： 10.3788/OPE.20162407.1685.

Xiao-bin HONG, Jin-heng FENG, Pei-song LIN, et al. Damage detection of nonmetallic pipe by using nonlinear ultrasonic guided wave with signal delay[J]. Optics and precision engineering, 2016, 24(7): 1685-1693. DOI： 10.3788/OPE.20162407.1685.

摘要

由于超声导波难以准确检测非金属管道的早期损伤，本文提出了一种非线性超声导波延时方法对非金属管道结构损伤进行测试和定位。基于非线性超声调制机理分析了非金属管道损伤状态，使用同侧非线性超声的混频信号激励方式并根据超声导波传播速度的差异产生激励信号延时，然后在管道损伤处实现混频信号的非线性调制。采用HHT(Hilbert-HuangTransformation)提取混频延时信号的瞬时特征量，并通过分析非线性分量延时分组进行损伤区域检测，实现了对非金属管道裂纹损伤的定位。PVC(Ployninylchloride)非金属管道实验显示，无损伤状态下延时信号分组的标准化基准值为0.5188；单裂纹状态下延时信号分组标准值为0.5937，损伤定位相对误差为3.277%；双裂纹损伤状态下的标准化瞬时平均幅值为0.5801与0.6073，损伤定位值绝对误差小于4 mm。相对于利用小波包络分解的非线性延时定位检测法，实验得到的单裂纹损伤准确度提高了36.4%。结果表明该方法能够对非金属管道裂纹损伤准确定位，并能够检测早期多裂纹损伤。

Abstract

As the damages on nonmetallic pipes

especially early damages

are difficult to be detected by ultrasonic guided wave

this paper proposes a nonlinear ultrasonic guided wave with signal delay to detect and localize the defects on nonmetallic pipes. Based on the nonlinear ultrasonic wave theory

the damage states of nonmetallic pipes were analyzed and an incentive method with mixed signals from the same end of the signal delay was developed to generate signal delay according to different speeds of the mixing signals and to implement nonlinear modulation. The instantaneous characteristics of delay signal were extracted by HHT(Hilbert-Huang Transformation)

and damage location was achieved by analyzing different nonlinear modulation groups with signal delay. PVC(Polyvinyl chloride) pipes were used for experiments. In intact condition

the standardized reference values of signal delay groups is 0.5188. In damage of one crack

standardized value of signal delay groups is 0.5937 and the relative error is 3.277%. Moreover

in damage of two cracks

the standardized value of signal delay groups are 0.5937 and 0.6073

and the absolute error is less than 4mm. Compared to the wavelet envelope location approach

the relative error with one crack rises to 36.4%. These results turn out that the approach proposed in this paper is effective and accurate for the damage detection and location of nonmetallic pipes

and is available for the multi-damaged pipes.

关键词

Keywords

references

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