摘要
针对目前用于绝对低频振动测量的传感器在测量超低频(1 Hz以下)的绝对振动时,其输出信号完全被“淹没”的缺点,提出了一种基于光纤的超低频绝对振动速度传感器技术方案.从传感器的力学模型出发,导出了传感器谐振结构的动态模型,对传输光纤出射光光强分布的线性度进行了分析,得出了输出信号与振动输入信号的关系.实验结果表明,此传感器与惯性磁电式速度传感器相比,在低频段具有更高的灵敏度.
A fiber-optic velocity sensor which can be used for absolute vibration with ultra-low frequency was introduced. On the basis of the sensor＇s mechanical model, the dynamic motion model of resonant structure was presented. The linearity of the light intensity distribution from fiber-optic end was analyzed and the relation between the output signal and the signal of the vibration input was obtained. The study showed that it had higher sensitivity in the low frequency band than the inertial magnetoelectric velocity transducer.
出处
《浙江师范大学学报（自然科学版）》
CAS
2006年第1期47-51,共5页
Journal of Zhejiang Normal University:Natural Sciences
关键词
光纤传感器
绝对振动
超低频
灵敏度
fiber-optic sensor
absolute vibration
ultra-low frequency, sensitivity
