为了实现位移传感器的多点监控,设计了5个光纤环组成的光纤传感器,通过减小其中1个光纤环的半径使光纤出射端获得双光斑,当其他4个的任意1个光纤环在外力的作用下产生形变时,会使出射双光斑发生旋转,通过记录和分析4个光纤环形变和输出双光斑的旋转角度之间的关系,获得周围环境人员流动情况。实验表明,光斑旋转角度与传感器位移在一定范围内存在良好的线性响应关系,该传感器可以有效地应用于实际的多点监控中。

In order to realize multi-point monitoring of displacement sensor,five optical fiber loops with optical fiber ring are designed.By reducing the radius of one of the fiber rings,two light spots are obtained at the end of fiber.When the other four fiber rings are under external force the deformation occurs causing the emission spot to rotate.The relationship between the four optical fibers deformation and the rotation angle of the output spot is recorded and analyzed to obtain the flow of the surrounding environment.The experimental results show that there is a good linear response between the spot angle and the displacement of the sensor in a certain range,which can be effectively applied to the actual multi-point monitoring.