材料微观裂纹的光学低相干检测技术

详细信息

Optical Low Coherence Detection Technology of Material Micro Cracks

College of Automation, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要: 以材料的微观裂纹为检测对象，基于扫频光学的低相干技术原理，设计构建了马赫-泽德干涉结构的低相干系统，采用平衡探测器接收干涉光信号，并通过LabVIEW软件平台实现数据的采集与存储，得到了叶片微观裂纹的二维信息，再据此对该裂纹进行了图像重构。系统的检测分辨率可达到15.6 μm，该方法具有非侵入、检测分辨率高等优点。
- 微观裂纹检测 /
- 光学低相干 /
- 图像重构 /
- 高分辨率
Abstract: An optical low-coherence system including Mach-Zehnder interferometer is designed and applied to measure material micro cracks. Light signals are received by a balance detector, and are collected and then stored on LabVIEW platform. Images of micro cracks are reconstructed based on two-dimensional information of engine blade cracks. Its resolution is up to 15.6 μm. This method has advantages of noninvasion and high resolution.
- measurement of micro crack /
- optical low coherence /
- image reconstruction /
- high resolution

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