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关于流探针的研究,以提高材料疲劳裂检测的灵敏度
Qing Zhang1, Jiahuan Zheng1, Shengping Wu2
1College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 211816, China.
Sensors (Basel, Switzerland)
|October 16, 2025
概括
本研究介绍了一种灵活的印刷电路板 (FPCB) 探头,用于检测合金中的疲劳裂 (FC). 先进的探测器设计增强了磁场的焦点和信号灵敏度,以可靠地评估缺陷.
科学领域:
- 材料科学 材料科学 材料科学
- 非破坏性测试 不破坏性测试
- 电磁主义 电磁主义
背景情况:
- 合金在应力下容易发生疲劳裂 (FC),对结构完整性构成风险.
- 可靠检测这些FC,特别是那些具有任意方向的FC,需要专门的旋流 (EC) 探头.
研究的目的:
- 开发和验证一种新的柔性印刷电路板 (FPCB) 旋流探测器,用于更好地检测和描述合金中的疲劳裂.
- 为了改善磁场的方向性,聚焦,以及信号与噪声的比率,以便更灵敏地检测裂.
主要方法:
- 一个FPCB探针的设计,采用双层平面激发线圈与反向回合设计和双层差异接收线圈.
- 优化探测器参数,包括激发线圈重叠和激发接收线圈角度,使用有限元模拟.
- 实验验证探测器在检测不同大小和方向的表面裂方面的性能.
- 提取时间域特征 (峰值值 ΔP 和信号宽度 ΔW) 用于缺陷表征.
主要成果:
- FPCB探测器证明了有效检测不同大小和方向的表面疲劳裂.
- 反向伤口刺激线圈增强了磁场的方向性和聚焦.
- 不同接收线圈提高了灵敏度,并抑制了常态噪声.
- 提取的特征 (ΔP和ΔW) 与缺陷参数相关,但由于特征重叠,需要基于变压器的方法来准确分类.
结论:
- 拟议的FPCB流探测器提供了一种可靠和可解释的方法来评估元件的疲劳裂.
- 先进的探头设计和特征提取的结合,加上分类模型,使得缺陷的准确定量分析.
- 这项技术有助于改进合金的非破坏性测试和结构健康监测.
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