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首页> 外文会议>Nonintrusive Inspection, Structures Monitoring, and Smart Systems for Homeland Security >Real-time Monitoring of Structural Vibration Using a Novel Fiber Optic Accelerometer System
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Real-time Monitoring of Structural Vibration Using a Novel Fiber Optic Accelerometer System

机译：使用新型光纤加速度计系统实时监测结构振动

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摘要

This paper presents the use of a novel fiber optic accelerometer system to monitor civil engineering structures in real time. This sensor system integrates the Moire fringe phenomenon with fiber optics to achieve accurate and reliable measurements. A low-cost signal processing unit implements unique algorithms to further enhance the resolution and increase the dynamic bandwidth of the sensors. There are two major benefits in using this fiber optic accelerometer system for monitoring civil engineering structures. One is its immunity to electromagnetic (EM) interference making it suitable for difficult applications in such environments involving strong EM fields, electrical spark-induced explosion risks, and cabling problems, prohibiting the use of conventional electromagnetic accelerometers. The other benefit is its ability to measure both low- and high-amplitude vibrations with a constantly high resolution without pre-setting a gain level, as usually required in a conventional accelerometer. This benefit makes the sensor system particularly useful for real-time measurement of both ambient vibration (that is often used for structural health monitoring) and strong motion. This paper presents the prototype hardware and software development, characterization tests, and applications to real-time damage assessment, demonstrating the uniquely high performance of the Moire fringe fiber optic sensor system.
机译：本文介绍了使用新型光纤加速度计系统实时监控土木工程结构的情况。该传感器系统将莫尔条纹现象与光纤集成在一起，以实现准确而可靠的测量。低成本信号处理单元实施独特的算法，以进一步提高分辨率并增加传感器的动态带宽。使用这种光纤加速度计系统监视土木工程结构有两个主要好处。其中之一是它具有抗电磁（EM）干扰的能力，使其非常适合在涉及强EM场，电火花引发的爆炸风险和布线问题的环境中的困难应用，从而禁止使用常规的电磁加速度计。另一个好处是它能够以恒定的高分辨率测量低振幅和高振幅振动，而无需像常规加速度计通常那样预先设置增益水平。这种优势使传感器系统对于实时测量环境振动（通常用于结构健康状况监测）和剧烈运动特别有用。本文介绍了原型硬件和软件开发，特性测试以及在实时损伤评估中的应用，展示了Moire条纹光纤传感器系统的独特高性能。

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