基于微波近场反射计和相位解封的3LPE涂层管道的外部腐蚀的视觉定量表征
1State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Engineering Research Center of NDT and Structural Integrity Evaluation, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Sensors (Basel, Switzerland)
|August 28, 2025
概括
这项研究引入了先进的微波近场非破坏性测试 (NDT),用于检测管道上三层聚乙烯 (3LPE) 涂层下的外部腐蚀. 这种新的方法可以准确地描绘和评估管道缺陷,提高安全性和完整性.
科学领域:
- 材料科学
- 非破坏性测试
- 腐蚀工程
背景情况:
- 三层聚乙烯 (3LPE) 涂层的钢管道对于石油和天然气运输至关重要.
- 在3LPE涂层下的外部腐蚀对管道完整性构成重大风险.
- 非破坏性评估 (NDE) 对于检测这些地下缺陷至关重要.
研究的目的:
- 探索线性频率扫描微波近场NDT用于成像和评估3LPE涂层下的孔腐蚀.
- 开发和验证先进的信号处理技术,以改善缺陷的特征.
主要方法:
- 线性频率扫描微波近场NDT.
- 一种改进的分支切割方法,用于高精度的微波相位图像解封.
- 基于核密度估计 (KDE) 的背景减去以减轻升起效应.
- 主要组件分析波段用于信号增强和人工物减少.
主要成果:
- 改进的分支切割方法在分阶段解封中表现出卓越的精度和稳定性.
- KDE有效地抑制了起飞效应,提高了几何精度.
- 增强了信号与噪声的比率和图像对比度,减少了人工物.
- 实验结果证实了拟议方法的可行性.
结论:
- 开发的微波NDT方法有效地检测,成像和描述3LPE管道涂层下的外部腐蚀.
- 先进的信号处理技术显著提高了NDT方法的可靠性和准确性.
- 这项研究有助于提高管道安全和完整性管理.
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