【摘要】 提出一种使用GRIN透镜和菱形光阑构成的光强度调制的地震波垂直位移测量原理.对系统的输出光强与位移之间的耦合关系进行了分析计算以及仿真.该系统具有结构简单、动态范围好、灵敏度可调、抗电磁干扰等特点.并与常规磁电式的地震检波器在线测试比较,得到了比较满意的结果.更多还原

【Abstract】 A new type of displacement seismometer based on the principle of collimated beam transmission intensity modulation is presented,which is mainly composed of graded-index lenses and some kind of rhombic diaphragm.An artificial calculation shows that the displacement seismometer has good flexibility in measurement range and sensitivity through adjusting the configuration parameters.The final experimental results indicate that the displacement seismometer functions well as compared to that of the traditional magnetoelectric seismometer.更多还原