【摘要】 为满足强电磁场环境下的高精度三维地震勘探的需求,研制了一种高精度三分量光弹光纤加速度地震传感器,该传感器具有线性度好、抗横向谐振的特点。利用光弹原理,设计出三轴光弹敏感系统,可高精度检测加速度的三个轴向分量。采用双弹簧弹性系统,有效地提高了加速度传感器的抗横向谐振特性,且线性度好。该传感器的主要参数共振频率为3500Hz,横向灵敏度系数为0.11%,主轴相位灵敏度为3.7×10-3rad/m·s-2。更多还原

【Abstract】 In order to provide a high accuracy three-component accelerometer for seismic exploration in the high electro-magnetic area, a novel three-component photoelastic fiber optic accelerometer with good linearity and high transverse resonance is designed. Based on the photoelastic effect, three-axis photoelastic sensing systems are designed to measure the three-orthogonal components of acceleration. Dual-spring system in the accelerometer increases the linearity and transverse resonance of the accelerometer. The main design parameters of the accelerometer are as following: natural frequency: 3 500 Hz; transverse sensitivity ratio: 0.11%; on-axis phase detection sensitivity: 3.7×10 -3 (rad/m·s -2 ).更多还原