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An optical fiber sensor for simultaneous measurement of flow rate and temperature in the pipeline

机译：同时测量管道中的流量和温度的光纤传感器

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摘要

An optical fiber sensor was proposed and studied for the simultaneous measurement of flow rate and temperature. It includes a capillary steel tube, an adjustable target and two fiber Bragg gratings (FBGs). The two fiber Bragg gratings were fixed in the tube by glue, and they could be protected well. One end of the tube was assembled in the protective shell, the other end was connected to a target. Flow rate and temperature would both cause the wavelength shifts of FBGs. Without causing a large adjustment, the flow sensitivity of the proposed sensor could be adjusted by only assembling a properly designed target. On the basis of simulation, the proposed sensor was fabricated and realized the simultaneous measurement of flow rate and temperature, which was verified by experiments. Due to the limitation of experiment system, the flow rate accuracy was up to 2.27% in the range of 5-16 m(3)/h, and the temperature accuracy was under +/- 1 degrees C in the range of 23-83 degrees C. With advantages of compact size, high sensitivity, wide measurement range and small pressure loss, it has a great potential application in many areas.
机译：提出并研究了用于同时测量流量和温度的光纤传感器。它包括一个毛细管，一个可调节的靶材和两个光纤布拉格光栅（FBG）。两个光纤布拉格光栅通过胶水固定在管中，可以得到很好的保护。将管的一端组装在保护壳中，另一端连接到目标。流速和温度都会引起FBG的波长偏移。在不造成较大调整的情况下，可以仅通过组装适当设计的目标来调整建议的传感器的流量灵敏度。在仿真的基础上，制作了所提出的传感器，实现了流量和温度的同时测量，并通过实验验证。由于实验系统的限制，在5-16 m（3）/ h的范围内，流速精度高达2.27％，在23-83的范围内，温度精度在+/- 1摄氏度以下具有体积小，灵敏度高，测量范围广，压力损失小等优点，在许多领域具有巨大的潜在应用前景。

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