用于大面积无损检测的全光纤光声系统

IF 5.7 2区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY
Yuliang Wu, Xuelei Fu, Jiapu Li, Pengyu Zhang, Honghai Wang, Zhengying Li
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引用次数: 0

摘要

无损检测是保证设备安全运行的重要手段。在各种无损检测技术中,超声无损检测以其灵敏度高、速度快、缺陷定位准确等优点得到了广泛的关注。光声无损检测是超声无损检测中的一个新兴领域,由于其抗电磁干扰的特性而受到广泛的关注。然而,现有的光声无损检测系统存在激发强度不足、超声信号特征复杂等问题,阻碍了大面积无损检测和裂纹的精确显示。在这项研究中,我们提出了一种用于大面积无损检测的全光纤光声系统。为了解决这些问题,我们开发了一种可以优化和控制的光声发生器单元,以产生更强的超声波信号。此外,我们还利用模态分解来简化检测到的超声信号,以减轻系统中声阻抗不匹配引起的模态混叠问题。因此,该技术允许对高达50*50 cm 2的大面积裂缝进行监测,分辨率提高到1 mm。目前的技术为高分辨率设备裂缝监测铺平了道路,大大提高了各种环境下的精度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
All-fiber photoacoustic system for large-area nondestructive testing
Nondestructive testing (NDT) is of paramount importance in ensuring the safe operation of equipment. Among various NDT techniques, ultrasonic NDT has garnered widespread attention due to its high sensitivity, fast speed, and accurate defect location. Photoacoustic NDT, a burgeoning field in ultrasonic NDT, is particularly attractive due to its immunity to electromagnetic interference. However, existing photoacoustic NDT systems suffer from inadequate excitation intensity and complex ultrasonic signal characteristics, impeding large-area NDT and accurate crack visualization. In this study, we present an all-fiber photoacoustic system for large-area NDT. To address the issues, we have developed a photoacoustic generator unit that can be optimized and controlled to generate stronger ultrasonic signals. Furthermore, we have employed mode decomposition to simplify the detected ultrasonic signals by mitigating the acoustic impedance mismatch-induced mode mixing problem in the system. As a result, the technology allows for large-area crack monitoring of up to 50*50 cm 2 with an improved resolution of 1 mm. The present technology paves the way for high-resolution equipment crack monitoring with substantially enhanced accuracy in various environments.
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来源期刊
CiteScore
12.80
自引率
12.10%
发文量
181
审稿时长
4.8 months
期刊介绍: Structural Health Monitoring is an international peer reviewed journal that publishes the highest quality original research that contain theoretical, analytical, and experimental investigations that advance the body of knowledge and its application in the discipline of structural health monitoring.
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