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Novel Optical Fiber Sensors for Monitoring Bridge Structural Integrity

機譯：用于監測橋梁結構完整性的新型光纖傳感器

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This IDEA project successfully developed a novel sensor system based on innovative integration of fiber optics and Moire phenomena for measuring dynamic response of highway bridges to assess their structural integrity. The 18-month project was conducted in two phases. Work in the initial phase focused on the development of a prototype sensor system. Technical specifications of the proposed fiber optic accelerometer system were established, based on which a conceptual design of the system was developed. The sensor head consisted of a pair of parallel grating panels, a pendulum, and two pairs of fibers with collimators. Computer simulation was performed to determine optimal tradeoff between the sensors conflicting dynamic bandwidth and resolution, and furthermore the key design parameters including the optical grating pitch and the mass, stiffness, and damping of the pendulum. A special signal processing algorithm was developed to further broaden the dynamic bandwidth and enhance the measurement sensitivity of the accelerometer. An auto-inspection/auto-adjustment procedure was developed to achieve high accuracy and alignment in fabricating the sensor head. A portable prototype multichannel accelerometer system was developed that included multiple sensor heads, a lowcost signal box (for sensor interrogation) and a PC (for signal processing).

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Feng, M. Q.;
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年度 2009
頁碼 p.1-52
總頁數 52
原文格式 PDF
正文語種 eng
中圖分類工業技術;
關鍵詞
Fiber optics ; Optical fibers ; Structural integrity monitors ; Bridges (Structures) ; Dynamic responses ; Highway bridges ; Investigations ; Implementation plans ; Computerized simulation ; Research objectives;

機譯：光纖;光纖;結構完整性監測器;橋梁（結構）;動態響應;公路橋梁;調查;實施計劃;計算機模擬;研究目標;

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機譯：真正分布式的光纖傳感器，用于結構健康監測：從電信光纖抽水塔到堤壩漏水檢測和混凝土結構應變監測
2. Truly Distributed Optical Fiber Sensors for Structural Health Monitoring: From the Telecommunication Optical Fiber Drawling Tower to Water Leakage Detection in Dikes and Concrete Structure Strain Monitoring [J] . Jean-Marie Henault, Gautier Moreau, Sylvain Blairon, Advances in civil engineering . 2010,第2期

機譯：真正分布式的光纖傳感器，用于結構健康監測：從電信光纖抽水塔到堤壩漏水檢測和混凝土結構應變監測
3. Selection of Optical Fibers Paths and Sensor Locations for Monitoring the Integrity of Composite Patching [J] . GEORGE J. TSAMASPHYROS, GEORGE N. KANDERAKIS, NIKOS K. FURNARAKIS Applied composite materials . 2003,第6期

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4. Real time Continuous Structural Integrity Monitoring of Flexible Risers with Optical Fiber Sensors [C] . S. R. K. Morikawa, C. S. Camerini, A. M. B. Braga, Offshore technology conference;OTC 10 . 2010

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6. Structural Health Monitoring Using Textile Reinforcement Structures with Integrated Optical Fiber Sensors [O] . Kort Bremer, Frank Weigand, Yulong Zheng, 2017

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8. Use of Fiber Bragg Grating (FBG) Sensors for Performing Automated Bridge Pier Structural Damage Detection and Scour Monitoring. [R] . Papanicolaou, A. N. T., Tsakiris, A. 2012

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Novel Optical Fiber Sensors for Monitoring Bridge Structural Integrity

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