基于薄壁圆筒结构的光纤光栅瓦斯压力传感器

为提高瓦斯压力监测的精度和准确性,设计了一种带温度补偿、基于薄壁圆筒结构的高灵敏度新型光纤光栅瓦斯压力传感器。通过理论分析,确定了传感器的结构和尺寸。该传感器采用内径15 mm、壁厚0.13 mm、材料为30Cr Mn Si A的薄壁圆筒。通过测试,传感器灵敏度为220 pm/MPa,瓦斯压力为10 MPa时光纤光栅中心波长漂移量为2.93 nm,基本误差小于0.05 MPa,具有较好的可重复性。现场应用表明,新型传感器具有较高精度,克服了温度对监测结果的影响。

Thin-walled cylinder structure based optical fiber grating gas pressure sensor

We design a new high sensitive fiber grating gas pressure sensor with temperature compensation based on a thin walled cylinder structure to improve the precision and accuracy of gas pressure sensing. We determine its structure and size through theory analysis. It has a thin walled cylinder structure with inner diameter of 15 mm, wall thickness of 0.13 mm and 30CrMnSiA as material. Its sensitivity is 220 pm/MPa.The drift amount of its fiber grating central wavelength is 2.93 nm when gas pressure is 10 MPa.It has error of less than 0.05 MPa and better reproducibility.Practical application shows that it has higher accuracy and can overcome the impact of temperature on measurement results.