Shandong Science ›› 2022, Vol. 35 ›› Issue (6): 109-115.doi: 10.3976/j.issn.1002-4026.2022.06.014

• Optical Fiber and Photonic Sensing Technology • Previous Articles     Next Articles

Design of flow-velocity sensor based on double fiber Bragg gratings

MA Long1, ZHANG Fa-xiang2, LIU Xiao-hui2, WANG Ying-ying2, WANG Chang2, LI Hui2,*()   

  1. 1. Shandong FYBSENSE Photoelectric Technology Co., Ltd, Jinan 250098, China
    2. Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
  • Received:2021-11-25 Online:2022-12-20 Published:2022-12-02
  • Contact: LI Hui E-mail:12110720002@fudan.edu.cn

Abstract:

A double fiber Bragg grating (FBG) flow-velocity sensor is designed for measuring the flow velocity. The sensor mainly comprises shell, FBG measuring module, and fixture. The sensitivity and dynamic range are tested, and the influence of different temperature and pressure on the performance of the sensor is analyzed. The sensitivity of the fiber-optic flow sensor is 76 mm/s, and the flow velocity is measured in the range of 0 to 1.2 m/s. The sensor is insensitive to temperature and ambient pressure and can meet the needs of flow-velocity measurement in the fields of the exploitation and transportation of oil and gas as well as the oceans and rivers.

Key words: flow velocity, fiber optic flow velocity-sensor, double fiber Bragg grating

CLC Number: 

  • TP212.1