互补偿型光纤双向应变—位移点式传感器

Point Sensor of Reciprocity-compensated Type Fiber-optic Bi-directional Strain-displacement

在互补偿型光纤双向应变—位移传感器中 ,耦合器将光分束到粘贴于拉敏区或压敏区的两根光纤 ,且调制光由两探测器测量。通过引入拉敏光纤和压敏光纤的自相对损耗 ,可有效消除光纤应变—位移传感器中光源功率波动所引起的误差。微位移架上的位移实验表明标准误差是～ 0 16mm .

In the reciprocity-compensated type fiber-optic bi-directional strain-displacement sensor,a coupler splits the light into the two fiber bonded in the tension or compression sections,and the modulated lights are measured by two detectors.By introducing the reciprocity-compensated parameter between the tension-sensitized fiber and the compensation-sensitized fiber,the error derived by the power fluctuate of optical source can be eliminate efficiently in the fiber-optic strain-displacement sensor.In the micro-displacement rack,the displacement experiment indicates that the standard error was ～0.16 mm.