一种光纤布喇格光栅压力传感器的设计及实验

报道了一种新型光纤光栅压力传感器设计和实验结果.传感器利用双拱形结构,配合工形膜片将纵向分布的压力转化为膜片横向的应变,通过膜片结构传递应变给光纤光栅,从而达到测量纵向分布压力的目的.实验结果表明:当传感器受到纵向均布压力作用时,能够较好地感知压力的变化,光纤光栅中心波长的漂移与所受压力呈线性变化,且线性度达到0.999.在压力测量范围内,压力灵敏度达到1.059 × 10~(-3)/MPa.

Design and Experiment of Fiber Bragg Grating Pressure Sensor

A novel optical fiber Bragg grating(FBG)pressure sensor is proposed.Vertical distribution of pressure iS transformed to horizontal strain of the chip,and transmitted to FBG which is pasted on the chip.By monitoring the central wavelength shift difference of the FBG,the vertical distri bution of pressure can be obtained.It has proved that the variety of pressure can be sensed by the sensor.Preliminary experiments were carried out and the feasibility of this proposed sensor is verified.The experimental results indicate that the pressure measurement sensitivity can reach 1.059×10~(-3)/MPa,while the correlation coefficient is 0.999.