【摘要】 为了实现高压测量时的温度交叉敏感问题,提出一种基于自由弹性变形体的光纤光栅压力传感器结构及光纤光栅传感信号的自解调方法。与传统光纤光栅传感器中传感单元与解调单元相互分离的结构不同,该文提出的光纤光栅压力传感器系统利用一对匹配的光纤光栅和一个简单的等腰三角形悬臂梁结构,实现了传感解调的合而为一,解决了光纤光栅传感器的交叉敏感和信号啁啾的问题。仿真与初步的试验结果表明,在高达100M Pa的压力范围内,测量灵敏度为8.5 pm/M Pa。更多还原

【Abstract】 A free active element bulk-modulus-based fiber Bragg grating(FBG) high-pressure sensor was developed with a self-demodulation method for the FBG wavelength shift signals.Unlike other FBG sensors which have separate sensing and demodulating elements,this FBG high-pressure sensor has only a single structure for both sensing and demodulating.The simple isosceles triangle cantilever structure solves the problems of cross-sensitivity and chirped signals in FBG sensors.Simulation results and preliminary experimental results indicate that the pressure measurement sensitivity can reach 8.5 pm/MPa for pressure from standard atmospheric pressure to 100 MPa.更多还原