基于光纤布拉格光栅的流速流向监测传感器设计。

Design of Flow Velocity and Direction Monitoring Sensor Based on Fiber Bragg Grating.

机构信息

State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China.

Structural Health Monitor and Control Institute, Shijiazhuang Tiedao University, Shijiazhuang 050043, China.

出版信息

Sensors (Basel). 2021 Jul 20;21(14):4925. doi: 10.3390/s21144925.

DOI:10.3390/s21144925

PMID:34300664

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8309912/

Abstract

The real-time monitoring of the flow environment parameters, such as flow velocity and direction, helps to accurately analyze the effect of water scour and provide technical support for the maintenance of pier and abutment foundations in water. Based on the principle of the Fiber Brag Grating sensor, a sensor for monitoring the flow velocity and direction in real-time is designed in this paper. Meanwhile, the theoretical calculation formulas of flow velocity and direction are derived. The structural performance of the sensor is simulated and analyzed by finite element analysis. The performance requirements of different parts of the sensor are clarified. After a sample of the sensor is manufactured, calibration experiments are conducted to verify the function and test the accuracy of the sensor, and the experimental error is analyzed. The experimental results indicate that the sensor designed in this paper achieves a high accuracy for the flow with a flow velocity of 0.05-5 m/s and the flow velocity monitoring error is kept within 7%, while the flow direction monitoring error is kept within 2°. The sensor can meet the actual monitoring requirements of the structures in water and provide reliable data sources for water scour analysis.

摘要

实时监测水流环境参数，如流速和流向，有助于准确分析水流冲刷的影响，为水工建筑物墩台基础的维护提供技术支持。本文基于光纤布拉格光栅传感器原理，设计了一种用于实时监测流速和流向的传感器，并推导出了流速和流向的理论计算公式。采用有限元分析对传感器的结构性能进行了模拟分析，明确了传感器各部分的性能要求。制作了传感器样品后，进行了标定实验，验证了传感器的功能和测试精度，并对实验误差进行了分析。实验结果表明，该文设计的传感器对流速为 0.05-5m/s 的水流具有较高的测量精度，流速监测误差保持在 7%以内，流向监测误差保持在 2°以内。该传感器可以满足水中结构物的实际监测要求，为水流冲刷分析提供可靠的数据来源。