The Key Laboratory of Optoelectronic Technology & System, Education Ministry of China, Chongqing 400044, China.
Sensors (Basel). 2019 Nov 16;19(22):4993. doi: 10.3390/s19224993.
A novel two-dimensional (2D) positioning method based on Raman distributed temperature sensing (RDTS) has been reported to dramatically improve positioning accuracy. Using a well-designed 2D distribution of optical fiber and corresponding algorithms, the heat source can be accurately located without crosstalk; however, there is a tradeoff between sensing distance and positioning accuracy. In our experiments, an RDTS system with a spatial resolution of 0.8 m along a 3 km multimode fiber (MMF) is used with specific 2D routing rules and corresponding algorithms. A positioning accuracy of about 0.1 m is obtained without hardware modification, which could be improved through the dense arrangement of fiber; however, this would sacrifice the sensing length. This solution can be used for both flat surfaces and curved surfaces such as pipes or tank surfaces. This scheme can also be extended to three-dimensional positioning using a delicate routing design of sensing fiber.
一种基于 Raman 分布式温度传感 (RDTS) 的新型二维 (2D) 定位方法已被报道，可以显著提高定位精度。通过设计良好的光纤 2D 分布和相应的算法，可以在没有串扰的情况下准确定位热源；然而，传感距离和定位精度之间存在折衷。在我们的实验中，使用了具有 3 公里多模光纤 (MMF) 沿 0.8 米空间分辨率的 RDTS 系统，采用特定的 2D 路由规则和相应的算法。无需硬件修改即可获得约 0.1 米的定位精度，通过密集排列光纤可以进一步提高精度，但这会牺牲传感长度。该解决方案可用于平面和曲面，如管道或罐面。通过巧妙的传感光纤布线设计，该方案还可以扩展到三维定位。
