一种光纤布喇格光栅涡街流量传感器

A Fiber Bragg Grating Vortex Flow Sensor

在流量计量领域中,利用光纤传感技术对涡街流量计量的研究较少,故具有重要的研究意义。该文设计了一种悬臂梁式的光纤布喇格光栅涡街流量传感器,其利用悬臂梁自由端振动使光纤布喇格光栅中心波长发生周期性移位,从而测量涡街频率,得到流体流量信息。温度传感测试实验与流量传感测试实验结果表明,该传感器温度灵敏度为17 pm/℃,涡街流量灵敏度为0.01895 Hz/(L·h^(-1)),非线性误差为2.23%。实验验证了该传感器可应用于液体涡街流量计量。

In the field of flow metering,there is relatively little research on vortex flow measurement using fiber optic sensing technology,so it has important research significance.The paper designed a cantilever beam type fiber Bragg grating vortex flow sensor is designed,which utilizes the vibration of the free end of the cantilever beam to periodically shift the center wavelength of the fiber Bragg grating,thereby measure the vortex frequency and get the fluid flow information.The temperature sensing test and flow sensing test are carried out.The results show that the temperature sensitivity of the sensor is 17 pm/℃,the vortex flow sensitivity is 0.01895 Hz/(L·h^(-1)),and the nonlinear error is 2.23%,which verifies that the sensor can be applied to measure the liquid vortex flow.