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作 者:任仲杰[1] 王海林[1] 朱日宏[1] 薛燕[1] 李珊珊[1] 徐珩[1]
出 处:《激光与光电子学进展》2016年第2期64-69,共6页Laser & Optoelectronics Progress
摘 要:光纤加速度传感器凭借其优势,近年来受到越来越多的关注。在梁式传感器的基础上,提出了一种基于双端固定梁的光纤传感器,其利用细径高数值孔径单模细光纤盘贴在梁上,形成传感光纤。分析了单模光纤最小的弯曲半径,从而可以在不带来弯曲损耗的前提下,尽可能多地盘贴光纤于梁臂上,提高其灵敏度。同时因为其双端固定的结构,极大地降低了其横向灵敏度,有利于制作三维传感器。理论上分析了该结构的传感器的共振频率,同时对其灵敏度进行了分析。设计了传感器测试装置,实验验证了传感器的响应线性,并对传感器的共振频率进行了标定。提出的传感器固有频率在360 Hz,在100 Hz处灵敏度值高达3300 rad/g,可以有效地用于低频加速度的检测。Fiber optic accelerometer receives more and more attention in recent years due to its advantages. A fiber optic accelerometer based on two-end fixed beam is presented, which is on the basis of the beam sensors. A kind of small-diameter single-mode optical fiber with high numerical aperture is wrapped on the beam as the sensing fiber. The minimum bending radius of the single-mode is analyzed, thereby more fiber can be affixed to the beam arm without any bending loss and the sensitivity is enhanced. The transverse sensitivity is greatly reduced due to the double- ended fixed structure which is convenient for the production of three- dimensional sensor. The nature frequency of the sensor and the sensitivity are analyzed theoretically. The linearity of the sensor response is analyzed by experiments. The sensor presented has the natural frequency around 360 Hz, and its sensitivity up to 3300 rad / g at 100 Hz. It can be used to detect low-frequency acceleration effectively.
关 键 词:传感器 双端固定梁 高数值孔径单模光纤 高灵敏度 低频加速度
分 类 号:TN29[电子电信—物理电子学]
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