摘要
研制了一种可用于油藏监测的3分量光纤加速度传感器。该传感器通过3个单方向传感单元分别获得3个正交方向上的被测加速度分量,每个传感单元是一质量-弹簧系统,通过波纹管与顺变材料构成复合弹性体,并采用光纤干涉结构将被测加速度通过解调光纤中的相位变化反映出来。实验数据表明,该加速度传感器具有良好的线性度、一致性和稳定性。系统的工作频带范围为10 Hz至800 Hz,其轴向灵敏度为38 dB re rad/g,交叉法去敏度达到32 dB re rad/g,最小可检测加速度为39.3μg/Hz1/2。
A 3-component(3-C) fiber-optic accelerometer suitable for well logging is presented. The accelerometer can accomplish the 3-C measurement by multiplexing three unidirectional sensing elements,in which every one is based on a push-pull mass-spring structure. Experimental results show good linearity, consistency and stability. The suitable measurement frequency range of the system is between 10 Hz and 800 Hz. The difference between on-axis sensitivity and cross-sensitivity is 32 dB re rad/g,and minimum detectable level is 39.3μg/Hz^1/2.
出处
《光电子.激光》
EI
CAS
CSCD
北大核心
2005年第8期901-905,共5页
Journal of Optoelectronics·Laser
基金
国家高科技"863"计划资助项目(2001AA602011-11)
关键词
光纤传感器
加速度传感器
3分量
accelerometers
fiber-optic sensors
3-component(3-C)