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低频光纤光声传感器阵列用于大面积高精度在线非破坏性测试

Yuliang Wu¹, Xuelei Fu¹, Jiapu Li¹

¹School of Information Engineering, Wuhan University of Technology, Hubei, China.

|May 13, 2025

概括

本研究引入了一种频率选择性功能层,以减少光纤光声学非破坏性测试中的超声频率. 这一创新扩大了检测范围,并改善了大面积应用的缺陷定位.

科学领域:

材料科学材料科学材料科学
声学声学在声学方面
非破坏性测试是指非破坏性测试.

背景情况:

光纤光声学 (FO-OA) 非破坏性测试 (NDT) 面临着扩大超声波检测范围的大面积应用的挑战.
扩大检测范围需要解决超声波强度和传播损失.
目前的研究往往侧重于增强超声波强度,不太重视减少传播损失.

研究的目的:

引入一种用于降低FO-OA NDT传感器中的超声波频率的新方法.
为了提高FO-OA NDT系统的检测范围和准确性.
为了减轻因检查范围有限而导致的错过检测问题.

主要方法:

将聚乙烯 (PE) 颗粒纳入热膨胀材料,以创建一个频率选择性的功能层.
在单个光纤上制造一个6元FO-OA传感器阵列.
在平板和厚样本上进行测试,以评估检测面积和定位精度.

主要成果:

从1 MHz降低到0.3 MHz的中央超声波频率.
平板结构的检测面积扩大到90 × 54厘米2.
实现了缺陷定位,定位误差在平板上小于0.894厘米,在厚的样本上小于0.781厘米.
在复杂的介质中表现出对多模式别名的优越免疫力.

结论:

使用PE粒子功能层的频率降低有效地减轻了FO-OA NDT中错过的检测.
开发的FO-OA传感器阵列为大面积检查提供了最先进的性能.
这种方法为复杂的介质中使用多种超声波传播模式的NDT提供了强大的解决方案.

关键词:

纤维微观结构的纤维结构.光纤传感传感器是指光纤传感器.光纤光学光声学听力学光纤传感器是指光纤传感器.非破坏性测试是指非破坏性测试.

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