【摘要】 研究了悬臂梁结构的光栅振动加速度传感器并提出了一种圆柱体形光纤Bragg光栅地震检波器模型,用边缘滤波的解调方法对此检波器的性能进行了实验研究。研究表明:所提出的光纤Bragg光栅地震检波器的方案是可行的,而且具有很高的检测精度、灵敏度、失真度和长期的稳定性,通过改变圆柱体内的阻尼,可使检波器的带宽和性能得到进一步提高;通过对质量块的调节,固有频率为140 Hz,灵敏度可达到69 pm/g。解调检测波长灵敏度可达-1.27 pm/mV,系统的波长分辨力为1.1 pm。更多还原

【Abstract】 The grating acceleration sensor with structure of cantilever beam is studied, and a cylinder-shaped cantilever structure of fiber Bragg grating geophone model is proposed. The edge filter method of demodulation performance of this detector are studied. The study shows that the design of fiber Bragg grating geophone is viable and has high precision, sensitivity, distortion and long-term stability. By changing the damping inside the cylinder will enable detector bandwidth and performance to improve. This seismic geophone is immuned from any electromagnetic inter-ference. With adjusting the mass, the inherent frequency of 140 Hz, and the sensitivity of 69 pm/9 are achievcd.The sensitivity of detection wavelength demodulation is-1.27 pm/mV,and the wavelcngth resolution of 1.1 pm.更多还原