基于光纤光栅的杆型二维振动传感器  

Two-Dimensional Rod-Shaped Vibration Sensor Based on Fiber Grating

作　　者：贾振安[1,2,3,4] 党硕 樊伟 禹大宽[1,2,3,4] JIA Zhen-an;DANG Shuo;FAN Wei;YU Da-kuan(School of Science,Xi′an Shiyou University,Xi′an 710065,China;Shaanxi Engineering Research Center of Oil and Gas Resource Optical Fiber Detection,Xi′an 710065,China;Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells,Xi′an 710065,China;Key Laboratory of CNPC-Research Laboratory for Optical Fiber Dynamic Detection of Oil Reservoirs,Xi′an 710065,China)

机构地区：[1]西安石油大学理学院,陕西西安710065 [2]陕西省油气资源光纤探测工程技术研究中心,陕西西安710065 [3]陕西省油气井测控技术重点实验室,陕西西安710065 [4]CNPC重点实验室——油藏光纤动态检测研究室,陕西西安710065

出　　处：《红外》2023年第5期24-31,共8页Infrared

基　　金：陕西省教育厅重点实验室科研计划项目(18JS093);CNPC测井重点实验室基金项目(20216328);西安石油大学研究生院创新与实践能力培养计划项目(YCS212147)。

摘　　要：为了实现两个方向的振动信号检测,提出了一种以杆为弹性结构的二维光纤光栅振动传感器。首先对该传感器进行了理论分析,并推导出其固有频率和灵敏度公式。然后对传感器结构进行了优化仿真,确定各个参数的最终值。最后通过实验研究了传感器的各项性能。实验结果表明,该传感器在x方向上的固有频率为493Hz,灵敏度为54pm/g,线性度为99.9%;在y方向上的固有频率为466Hz,灵敏度为5pm/g,线性度为97.5%。此外,采用双光纤光栅消除了温度对振动信号测量的影响,温度灵敏度为0.1pm/℃。该传感器结构简单,可检测两个方向的振动信号,消除了温度的影响,在振动信号检测中表现良好,因此在多维振动信号检测领域具有重要研究意义。In order to realize the vibration signal detection in two directions,a two-dimensional fiber grat-ing vibration sensor with a rod as the elastic structure is proposed.Firstly,the theoretical analysis of this two-dimensional fiber grating vibration sensor is carried out,and the formula of its natural frequency and sensitivity is derived.Then the sensor structure is optimized and simulated to determine the final value of each parameter.Finally,the performance of the sensor is studied experimentally.The experimental results show that the natural frequency of the sensor in the x direction is 493Hz,the sensitivity is 54pm/g,and the linearity is 99.9%.The natural frequency in the y direction is 466Hz,the sensitivity is 5pm/g,and the linearity is 97.5%.In addition,the effect of temperature on vibration signal measurement is eliminated by using dual fiber grating,and the temperature sensitivity is 0.1pm/℃.The sensor which can detect vibra-tion signals in both directions and eliminate the influence of temperature is simple in structure.Since the sen-sor has good performance in the detection of vibration signals,it has important research significance in the field of multidimensional vibration signal detection.

关 键 词：光纤光栅 振动 二维 温度补偿 

分 类 号：O43[机械工程—光学工程]