盘式光纤加速度计的灵敏度增强方法研究
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摘要
提出一种基于多层缠绕光纤环的灵敏度增强方法以实现盘式光纤加速度计高灵敏度传感。通过分析单层光纤敏感盘盘片的应力应变状态,探讨光纤盘粘贴区域、弹性盘片尺寸、传感光纤类型3种因素对灵敏度的影响,采用多层光纤敏感盘对盘式光纤加速度传感器进行灵敏度增强的方案,并通过有限元软件仿真验证。采用多层光纤敏感盘制作的盘式光纤加速度计,其加速度灵敏度能够达到6 243.4 rad/g,有效地提高了盘式光纤加速度传感器的灵敏度。
A sensitivity enhancement method based on multilayer fiber sensing coils is proposed to achieve high sensitivity sensing of fiber optic disc accelerometer. Through analyzing the stress-strain state of the single-layer fiber sensing disc, the influence of fiber sensing coil's paste area, elastic disc size and sensing fiber type on the acceleration sensitivity are discussed, an effective sensitivity enhancing method with the multilayer fiber sensing coils is proposed with its simulation model of finite element software. A fiber optic flexural disc accelerometer based on multilayer fiber sensing coils has been produced with a high sensitivity of 6243.4 rad/g, and the results show that the sensitivity has been effectively enhanced.
A sensitivity enhancement method based on multilayer fiber sensing coils is proposed to achieve high sensitivity sensing of fiber optic disc accelerometer. Through analyzing the stress-strain state of the single-layer fiber sensing disc, the influence of fiber sensing coil's paste area, elastic disc size and sensing fiber type on the acceleration sensitivity are discussed, an effective sensitivity enhancing method with the multilayer fiber sensing coils is proposed with its simulation model of finite element software. A fiber optic flexural disc accelerometer based on multilayer fiber sensing coils has been produced with a high sensitivity of 6243.4 rad/g, and the results show that the sensitivity has been effectively enhanced.
引文
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[2]MURASHKINA T I,MOTIN A V,BADEEVA E A.Manufacturing technology of a two-axial fiber-optic accelerometer[J].Journal of physics:conference series,2017,803(1):012102.
[3]瞿柯林.新型干涉型光纤水听器动态范围研究及在水下测量中的应用[D].杭州:浙江大学,2016:1–7.
[4]侯璐.光纤地震测量信号解调系统的若干实用化研究[D].哈尔滨:哈尔滨工程大学,2016:1–3.
[5]张颖,姚江淮,魏江南,等.一种新型光纤加速度传感器的研究[J].光电子·激光,2017,28(4):354–360.
[6]MACDONALD G A.A review of low cost accelerometers for vehicle dynamics[J].Sensors and actuators A:physical,1990,21(1/2/3):303–307.
[7]HAN Jing,ZHANG Wentao,JIANG Dongshan,et al.Fiber optic 3-component seismometer[J].Photonic sensors,2014,4(2):102–107.
[8]LOPEZ-HIGNERA J M,MORANTE M A,COBO A.Simple low-frequency optical fiber accelerometer with large rotating machine monitoring applications[J].Journal of lightwave technology,1997,15(7):1120–1130.
[9]CRANCH G A,NASH P J.High-responsivity fiber-optic flexural disk accelerometers[J].Journal of lightwave technology,2000,18(9):1233–1243.
[10]王永杰,李芳,肖浩,等.盘片式光纤传感器灵敏度计算方法[J].光学学报,2007,27(8):1387–1392.
[11]范钦珊.轴对称应力分析[M].北京:高等教育出版社,1985:260–262.
[12]BUCARO J A,LAGAKOS N.Lightweight fiber optic microphones and accelerometers[J].Review of scientific instruments,2001,72(6):2816–2821.