耦合型光纤应变传感器监测钢筋混凝土梁实验

Experiment on Strain Monitoring of Reinforced Concrete Girder Using the Coupling Type Optical Fiber Strain Sensor

对已达到要求耦合比的熔锥型单模光纤耦合器,继续用低温火焰烧灼耦合区制成了用于测量建筑物应变的耦合型光纤应变传感器,并用环氧树脂将其粘贴在实际的钢筋混凝土梁上与传统电阻应变片同时进行应变测试,试验结果表明,这种传感器实际测量钢筋混凝土的拉、压应变与电测值的差别,当应变超过80με时都在10%以内,可以在工程实际中使用。

Making a novel coupling optical fiber strain sensor based on to heat continually the coupled zone of single-mode fused optical fiber coupler to the required coupling. Pasting the sensor and traditional resistive strain gauge on the reinforced concrete girder the strains were measured with the sensor and gauge at one time. The result shows that the difference of both compress and stretch strain between the data obtained from coupling optical fiber strain sensor and traditional resistive strain gauge is within about 10% when strain is greater than 80με. It is possible to he used inthe practical engineering.