Defect detection of pipes using Lyapunov dimension of Duffing oscillator based on ultrasonic guided waves
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- 作者：Jing Wua ; Yu Wanga ; Weiwei Zhangb ; Zhenhua Niea ; Rong Lina ; Hongwei Maa ; c ; tmahw@jnu.edu.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Defect detection ; Lyapunov dimension ; Ultrasonic guided wave ; Defect localization ; Pipes
- 刊名：Mechanical Systems and Signal Processing
- 出版年：2017
- 出版时间：1 January 2017
- 年：2017
- 卷：82
- 期：Complete
- 页码：130-147
- 全文大小：4116 K
文摘
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A novel method for orienting and positioning the small-defect in pipes based on Lyapunov dimension with ultrasonic guided wave is proposed.
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The proposed approach effectively improve the sensitivity of small defect detection.
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The weak damage echo signal immerged in the noise is detected.
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The proposed method could effectively identify small defect echoes with 4% lost of sectional area in pipes.
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The relative error for defect location was determined to be less than 5%.