为提高光纤光栅传感器的精度和长期使用稳定度，在分析其应变响应机理和研究现状的基础上，设计基于应变弹性体封装的光纤光栅应变传感器，封装材料采用305不锈钢。力学传递原理和 An-sys力学分析结果都表明：该传感器能够有效地通过弹性结构将应变传递到光纤光栅上。利用激光切割技术制作不锈钢光纤光栅传感器封装壳体，在－2000～2000με的测量范围内，实验测得其应变灵敏度为1．21pm／με、线性度达0．9996、检测精度不大于1με、稳定度不大于±3με。%Basing on analyzing the response mechanism and theresearch status of fiber Bragg grating strain sensors,the FBG(fiber Bragg grating)strain sensor with packaged elastic body structure was proposed to im-prove the sensor’s precision and stability.Both principle of mechanical transmission and the Ansys mechanical analysis shows that,through an elastic structure,the sensor made of 305 steel can transfer the strain to FBG effectively.In the range of -2 000 ~2 000με,the sensor with laser cutting technology-supported steel shell has 1.21pm/μεstrain sensitivity,0.999 6 linearity,≤1μεdetection precision and ≤ ±3μεstability.
展开▼
