法布里-珀罗光纤传感器在桥梁健康监测中的应用

对桥梁实施监测 ,是诊断桥梁健康状况的主要手段 ,现代传感技术和计算机技术的发展 ,使桥梁健康状态的实时监测变为可能。笔者分析了法布里 -珀罗光纤传感器的基本原理和特性 ,设计了一种法布里 -珀罗应变测试系统 ,并在预应力混凝土连续桥梁上与电阻式应变传感器进行了应变对比测试试验。试验结果表明 ,法布里 -珀罗光纤传感器对环境温度不敏感 ,易与钢筋、混凝土复合 ,适用于桥梁结构的应变测试 ,可用于桥梁健康状态的在线监测

Application of Fabry-Perot Optical Fiber Sensor in Monitoring the Normality of Bridge

Bridge monitoring is a main measure to diagnose the normality of the bridge. The development of sensor and computer technology enables the real time monitoring of the normality of the bridge. Based on the analysis of the principle and characteristics of FFPI optical fiber sensor, a FFPI strain testing system is designed and developed, which has been used in testing the strain of the bridge. Electrical strain gauges are collocated with FFPI optical fiber strain sensor to verify the strain data. The test results prove that FFPI is not sensitive to temperature and easy to be incorporated with tendon and concrete. FFPI is suitable for testing the bridge strain and could be used in monitoring the real time mechanical normality of the bridge.