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首页> 外文会议>3rd International Workshop on Structural Health Monitoring, Sep 12-14, 2001, Stanford University >Structural Health Monitoring System for Aerospace Structures Using Optical Fiber Distributed Sensor
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Structural Health Monitoring System for Aerospace Structures Using Optical Fiber Distributed Sensor

机译：使用光纤分布式传感器的航空航天结构健康监测系统

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摘要

In this paper, we described analytical and experimental approaches for applying Brillouin Optical Time Domain Reflectometer (BOTDR) to aerospace structure health monitoring system. It is necessary to improve its spatial resolution and to separate strain and temperature effect. Firstly, Brillouin spectra are analyzed by differential spectrum method to improve spatial resolution and verify this method by 3-point bending test. Secondly, strain and temperature are measured simultaneously using the combined system BOTDR and fiber Bragg grating (FBG) sensor with wavelength division multiplexing (WDM), and the capability to separate strain and temperature is demonstrated. Additionally, the application of BOTDR sensing system for prototype carbon fiber reinforced plastic (CFRP) liquid hydrogen (LH_2) tank under cryogenic condition is shown.
机译：在本文中，我们描述了将布里渊光学时域反射仪（BOTDR）应用于航空航天结构健康监测系统的分析和实验方法。有必要提高其空间分辨率，并分离应变和温度效应。首先，通过微分光谱法对布里渊光谱进行分析，以提高空间分辨率，并通过三点弯曲试验对该方法进行验证。其次，使用带波分复用（WDM）的组合系统BOTDR和光纤布拉格光栅（FBG）传感器同时测量应变和温度，并展示了分离应变和温度的能力。此外，还展示了BOTDR传感系统在低温条件下原型碳纤维增强塑料（CFRP）液氢（LH_2）储罐中的应用。

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