光纤Bragg光栅振动传感器抗横向干扰设计  

Anti-transverse interference design of FBG vibration sensor

作　　者：张继军[1] 吴祖堂[1] 彭映成[1] 赵艳[1] 邹虹[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《传感器与微系统》2014年第7期95-97,102,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(41174033)

摘　　要：针对光纤Bragg光栅(FBG)振动传感器在使用过程中存在横向干扰的问题,对传感器探头结构和配合尺寸进行了优化设计,达到了抗横向干扰的效果。ANSYS模态分析表明,传感器的2阶、3阶、4阶模态谐振频率远大于1阶模态谐振动频率,可以有效避免传感器在使用过程中的交叉敏感问题。振动加载实验结果表明:在同等大小加速度激励下,传感器的横向输出占轴向输出的比例不超过3.47%,说明传感器具有良好的抗横向干扰能力。Aiming at problem of transverse interference of fiber Bragg grating（ FBG） vibration sensor in application process,anti-transverse interference effect is achieved by optimizing sensor probe structure and fit dimension.ANSYS modal analysis shows that the sensor has good ability of suppressing cross sensitivity that the second modal mode,third modal mode and fourth modal resonant frequency is considerably greater than the first modal resonant frequency.Vibration loading experimental result indicates that when impelled by same magnitude acceleration,the proportion of output signal from transverse makes 3.47 % of the axially one,which demonstrates the sensor has good anti-transverse interference capacity.

关 键 词：光纤BRAGG光栅 振动传感器 结构优化 ANSYS数值模拟 抗横向干扰 

分 类 号：TN253[电子电信—物理电子学]