FBG turbine flow rate sensor for acquiring flow rate and temperature simultaneously

JIANG Shan-chao; SUI Qing-mei; WANG Jing; WANG Zheng-fang; YE Qing-lin

doi:10.3788/OPE.20142210.2611

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FBG turbine flow rate sensor for acquiring flow rate and temperature simultaneously

更新时间：2020-08-13

- FBG turbine flow rate sensor for acquiring flow rate and temperature simultaneously
- Optics and Precision Engineering Vol. 22, Issue 10, Pages: 2611-2616(2014)
- 作者机构：
  
  山东大学控制科学与工程学院,山东济南,250061
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20142210.2611
  CLC： TN253
- Received：11 December 2013，
  
  Revised：03 February 2014，
  
  Published：25 October 2014
- 稿件说明：
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蒋善超, 隋青美, 王静等. 流速/温度共采的光纤布拉格光栅涡轮流速传感器[J]. 光学精密工程, 2014,22(10): 2611-2616

JIANG Shan-chao, SUI Qing-mei, WANG Jing etc. FBG turbine flow rate sensor for acquiring flow rate and temperature simultaneously[J]. Editorial Office of Optics and Precision Engineering, 2014,22(10): 2611-2616
蒋善超, 隋青美, 王静等. 流速/温度共采的光纤布拉格光栅涡轮流速传感器[J]. 光学精密工程, 2014,22(10): 2611-2616 DOI： 10.3788/OPE.20142210.2611.

JIANG Shan-chao, SUI Qing-mei, WANG Jing etc. FBG turbine flow rate sensor for acquiring flow rate and temperature simultaneously[J]. Editorial Office of Optics and Precision Engineering, 2014,22(10): 2611-2616 DOI： 10.3788/OPE.20142210.2611.

摘要

为实现敏感元件仅为单一光纤光栅流速传感器的多参数同时测量

提出了一种流速/温度共采的光纤布拉格光栅(FBG)涡轮流速传感器.该传感器通过涡轮实现流体冲击力对光纤光栅中心波长的频率调制

解决光纤光栅温度应变的交叉敏感

理论计算得到其流速检测灵敏度为2.91·10

-2

m/(s·Hz

-1

).为测试传感器的性能

搭建了传感器测试系统

并选取光纤动态解调仪解调的光纤光栅中心波长动态信号作为试验原始数据.应用快速傅里叶变换(FFT)法分析试验数据

得到传感器流速的检测下限为0.541 7 m/s'检测灵敏度为2.57·10

-2

m/(s·Hz

-1

)

检测精度为25 mm/s

略小于理论计算值

其主要原因在于圆管内流体的流速并非均匀分布的匀速运动

管道内壁对流体具有一定的黏滞力.应用经验模式分解分析原始数据获取其趋势项信号

得到该传感器的温度灵敏度为10.6 pm/℃'检测精度为0.5 ℃.

Abstract

To measure multi-parameters at the same time by a flow sensor with only one Fiber Bragg Grating(FBG) as the sensitive element

a novel FBG turbine flow rate sensor was proposed. This sensor uses a power element turbine to achieve a fluid impact force to modulate the frequency of FBG center wavelength and to overcome the cross-talking of temperature and strain effectively. The theoretical calculation of flow rate detection sensitivity is 2.91·10

-2

m/(s·Hz

-1

). To measure the properties of this sensor

a sensor measurement system was established

meanwhile the FBG center wavelength dynamic signal demodulated by a fiber dynamic demodulator was chosen to be the experiment origin data. A Fast Fourier Transform(FFT) was used to analyze the experiment data of the sensor. The result shows that the flower limit of flow rate is 0.541 7 m/s and the flow rate detection sensitivity is 2.57·10

-2

m/(s·Hz

-1

) with the detection accuracy of 25 mm/s

which are lower than the calculated values. It suggests that the main reason of these phenomena is that the flow rate of fluid in the transmission pipeline is not an even distributed uniform motion and the pipeline inner wall has some viscous forces on the fluid. Empirical mode decomposition was used to analyze the original signal. The experiment data indicate that the temperature detection sensitivity of this sensor is 10.6 pm/℃ and detection accuracy is 0.5 ℃.

关键词

Keywords

references

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