基于双等强度悬臂梁的光纤光栅加速度振动传感器
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摘要
研制了一种基于双等强度悬臂梁式光纤布拉格光栅(FBG)振动传感器。首先采用ANSYS软件对传感器进行数值计算与仿真,得到在各个阻尼比下传感器的幅频特性曲线和相频特性曲线,不断变化传感器结构参数,寻找最优谐振频率与加速度灵敏度,从而得到传感器最优结构参数;根据仿真所得的最优结构参数,进行传感器加工;利用所加工的振动传感器进行振动台试验研究并对所得实验数据进行处理,将处理后的数据与ANSYS软件仿真得到的数据进行比较,结果表明,振动平台所测得的实验结果与ANSYS软件仿真结果相吻合,传感器的谐振频率为80.74Hz,可实现50Hz以下低频振动信号的实时监测,在5～50Hz之间的加速度灵敏度约为20.85pm/m.s-2。
A fiber Bragg grating(FBG) acceleration vibration sensor based on the double uniform strength cantilever beams is developed.First,the simulation is conducted by ANSYS software.We can obtain the sensor amplitude-frequency and phase-frequency characteristics in each damping ratio.Through changing the parameters of the sensor structure,we can get sensor optimal structure parameters that can make the sensor with the best resonance frequency and acceleration sensitivity.Second,the sensor is fabricated based on the optimal structure parameters.Finally,the sensor is studied by the shaking table test.The experimental results show that the resonant frequency of the developed vibration sensor is 80.74 Hz,and the acclelration sensitivity is about 20.85 pm/m·s-2.Amplitude-frequency characteristics of the sensor in the 5-50 Hz frequency range show a flat horizontal line.The proposed sensor is suitable for the low-frequency(5-50 Hz) vibration signal detection.
A fiber Bragg grating(FBG) acceleration vibration sensor based on the double uniform strength cantilever beams is developed.First,the simulation is conducted by ANSYS software.We can obtain the sensor amplitude-frequency and phase-frequency characteristics in each damping ratio.Through changing the parameters of the sensor structure,we can get sensor optimal structure parameters that can make the sensor with the best resonance frequency and acceleration sensitivity.Second,the sensor is fabricated based on the optimal structure parameters.Finally,the sensor is studied by the shaking table test.The experimental results show that the resonant frequency of the developed vibration sensor is 80.74 Hz,and the acclelration sensitivity is about 20.85 pm/m·s-2.Amplitude-frequency characteristics of the sensor in the 5-50 Hz frequency range show a flat horizontal line.The proposed sensor is suitable for the low-frequency(5-50 Hz) vibration signal detection.
引文
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[8]LIU Qin-peng,QIAO Xue-guang,ZHAO Jian-lin,et al.low-frequency FBG accelerometer based on double cantileverbeam[J].Journal of Optoelectronics.Laser,2011,22(8):1119-1123.刘钦朋,乔学光,赵建林,等.双悬梁光纤布拉格光栅低频加速度传感器[J].光电子.激光,2011,22(8):1119-1123.
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[10]ZHAO Yong.Principle of fiber optic sensor and applica-tions[M].Beijing:Tsinghuan University Press,2007,161-162.赵勇.光纤传感原理与应用技术[M].北京:清华大学出版社,2007,161-162.
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[12]LI Chuan,LUO Zhong-fu,Li Ying-na,et al.Fiber Bragggrating low frequency accelerometer with uniformstrength cantilelever beam[J].Instrument Technique andSensor,2010,(4):4-5,44.李川,罗忠富,李英娜,等.基于等强度悬臂梁的光纤Bragg光栅低频加速度传感器[J].仪表技术与传感器,2010,(4):4-5,44.
[13]JIANG De-sheng,CHEN Da-xiong,LIANG Lei.Applicationof ANSYS in design of fiber Bragg grating accelerometer[J].Journal of Transducer Technology,2004,23(11),75-77.姜德生,陈大雄,梁磊.ANSYS在光纤Bragg光栅加速度计设计中的应用[J].传感器技术,2004,23(11):75-77.
[14]SUN Hua,LIU Bo,ZHOU Hai-bin,et al.A novel FBG highfrequency vibration sensor based on equi-intensity canti-lever beam[J].Chinese Journal of Sensors and Actua-tors,2009,22(9):1270-1275.孙华,刘波,周海滨,等.一种基于等强度梁的光纤光栅高频振动传感器[J].传感技术学报,2009,22(9):1270-1275.
[15]SUN Ru-jiao,SUN Li-min,Sun Zhi,et al.Design researchof fiber Bragg grating cccelerometer[J].Acta PhotonicaSinica,2007,36(1):63-67.孙汝蛟,孙利民,孙智,等.一种新型光纤布喇格光栅振动传感器研究[J].光子学报,2007,36(1):63-67.
[2]JUN Chang,HUO Dian-heng.Interrogating a fiber Bragggrating vibration sensor by narrow line width light[J].Journal of Electronic Science and Technology of China,2008,6(4):486-488.
[3]Guo T,Shao L,Tam H,et al.Tilted fiber grating acceler-ometer incorporating an abrupt biconical taper for clad-ding to core recouping[J].Opt.Express,2009,17(9):20651-20660.
[4]ZHANG Shao-jun,LIU Yue-ming.A novel low frequencyvibration sensor based on optical Bragg grating[J].Jour-nal of China University of Metrology,2010,21(2):104-107.张少君,刘月明.一种用于低频测量的光纤光栅振动传感器[J].中国计量学院学报,2010,21(2):104-107.
[5]SHEN Yang,SUN Li-min.Design of FBG-based acceler-ometer with high sensitivity and temperature self-com-pensation[J].Structural Engineers,2009,25(2):141-146.沈洋,孙利民.高灵敏度温度自补偿型光纤光栅加速度传感器设计[J].结构工程师,2009,25(2):141-146.
[6]LI Xue-cheng,LIU Su,Zhang Wen-tao,et al.Study on low-frequency characteristic of double-diaphragm fiber Bragggrating geophone[J].Journal of Optoelectronics.Laser,2010,21(4):529-532.李学成,刘肃,张文涛,等.双膜片结构光纤光栅地震检波器低频特性的研究[J].光电子.激光,2010,21(4):529-532.
[7]WANG Shan-li,XIANG Guang-hua,HU Man-li,et al.De-sign of a nevel FBG vibration sensor[J].Journal of Opto-electronics.Laser,2011,22(4):515-519.王善鲤,向光华,忽满利,等.一种新型光纤Bragg光栅振动传感器的设计[J].光电子.激光,2011,22(4):515-519.
[8]LIU Qin-peng,QIAO Xue-guang,ZHAO Jian-lin,et al.low-frequency FBG accelerometer based on double cantileverbeam[J].Journal of Optoelectronics.Laser,2011,22(8):1119-1123.刘钦朋,乔学光,赵建林,等.双悬梁光纤布拉格光栅低频加速度传感器[J].光电子.激光,2011,22(8):1119-1123.
[9]MA Chao,QIAO Xue-guang,JIA Zhen-an,et al.Researchon fiber Bragg grating geophone[J].Study on OpticalCommunication,2007,143(5):53-55.马超,乔学光,贾振安,等.光纤Bragg光栅地震检波器的研究[J].光通信研究,2007,143(5):53-55.
[10]ZHAO Yong.Principle of fiber optic sensor and applica-tions[M].Beijing:Tsinghuan University Press,2007,161-162.赵勇.光纤传感原理与应用技术[M].北京:清华大学出版社,2007,161-162.
[11]WANG Hong-liang,CHEN Jiao-min,Feng De-quan,et al.Characteristics of low-frequency vibration FBG sensor[J].Journal of Optoelectronics.Laser,2012,23(6):1023-1030.王宏亮,陈娇敏,冯德全,等.光纤Bragg光栅低频振动传感器的特性研究[J].光电子.激光,2012,23(6):1023-1030.
[12]LI Chuan,LUO Zhong-fu,Li Ying-na,et al.Fiber Bragggrating low frequency accelerometer with uniformstrength cantilelever beam[J].Instrument Technique andSensor,2010,(4):4-5,44.李川,罗忠富,李英娜,等.基于等强度悬臂梁的光纤Bragg光栅低频加速度传感器[J].仪表技术与传感器,2010,(4):4-5,44.
[13]JIANG De-sheng,CHEN Da-xiong,LIANG Lei.Applicationof ANSYS in design of fiber Bragg grating accelerometer[J].Journal of Transducer Technology,2004,23(11),75-77.姜德生,陈大雄,梁磊.ANSYS在光纤Bragg光栅加速度计设计中的应用[J].传感器技术,2004,23(11):75-77.
[14]SUN Hua,LIU Bo,ZHOU Hai-bin,et al.A novel FBG highfrequency vibration sensor based on equi-intensity canti-lever beam[J].Chinese Journal of Sensors and Actua-tors,2009,22(9):1270-1275.孙华,刘波,周海滨,等.一种基于等强度梁的光纤光栅高频振动传感器[J].传感技术学报,2009,22(9):1270-1275.
[15]SUN Ru-jiao,SUN Li-min,Sun Zhi,et al.Design researchof fiber Bragg grating cccelerometer[J].Acta PhotonicaSinica,2007,36(1):63-67.孙汝蛟,孙利民,孙智,等.一种新型光纤布喇格光栅振动传感器研究[J].光子学报,2007,36(1):63-67.
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