全光纤双传感臂振动传感器频率特性研究
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摘要
以全光纤Mach-Zehnder(M-Z)干涉仪为基础,阐述了光纤双传感臂振动传感器的工作原理和结构设计。按照理论设计的结构采用硫化硅橡胶及金属铁块制作了传感探头,并完成全光纤双传感臂M-Z干涉仪的制作,实现干涉可见度约为95.8%。搭建实验系统对不同频率的振动信号进行测试,初步测试结果表明,系统的固有频率在850～1 150 Hz之间,与理论计算相符;在固有频率以下,传感器工作频带范围是100～800 Hz,在固有频率以上工作频带范围是1.2～6.0 kHz。
The operation principle and construction design of a dual sensing arm fiber optic vibration sensor are described on the basis of all-fiber optic Mach-Zehnder(M-Z) interferometer.According to the theoretical design structure,it used the sensing probe made by the silicone rubber and iron block to complete the all-fiber optical dual sensing arm M-Z interferometer,and measured the interfere visibility was about 95.8%.It built the experimental system to detect different frequencies of the vibration signal.The preliminary test results indicated that the natural frequency of the system was between 850 Hz to 1 150 Hz,which is consistent with the theoretical analysis.Operating frequency band below the natural frequency of the sensor is from 100 Hz to 800 Hz,and above the natural frequency is from 1.2 kHz to 6.0 kHz.
The operation principle and construction design of a dual sensing arm fiber optic vibration sensor are described on the basis of all-fiber optic Mach-Zehnder(M-Z) interferometer.According to the theoretical design structure,it used the sensing probe made by the silicone rubber and iron block to complete the all-fiber optical dual sensing arm M-Z interferometer,and measured the interfere visibility was about 95.8%.It built the experimental system to detect different frequencies of the vibration signal.The preliminary test results indicated that the natural frequency of the system was between 850 Hz to 1 150 Hz,which is consistent with the theoretical analysis.Operating frequency band below the natural frequency of the sensor is from 100 Hz to 800 Hz,and above the natural frequency is from 1.2 kHz to 6.0 kHz.
引文
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[2]丁桂兰,刘振富,崔宇明,等.顺变柱体型全光纤加速度检波器[J].光学学报,2002,22(3):340-343.
[3]傅深泳,丁桂兰,陈才和,等.干涉型全光纤加速度地震检波器[J].光电工程,2003,30(6):39-42.
[4]王金海,陈才和,Zoran Salcic,等.三维推挽式顺变柱体干涉型加速度传感系统[J].光电工程,2006,33(6):139-144.
[5]孟洲,胡永明,熊水东,等.全保偏光纤水听器阵列[J].中国激光,2002,29(5):414-416.
[6]彭博栋,罗洪,倪明.成组光纤水听器特性研究[J].声学技术,2008,27(3):459-463.
[7]张姝红,李琛,周学滨.光纤传感技术在舰船抗冲击测量中的应用研究[J].中国测试,2009,35(4):83-85,89.
[8]江毅.光纤振动传感器探头的设计[J].光学技术,2002,28(2):148-149.
[9]Shi C Z,Zeng N,Ho H L,et al.Cantilever opticalvibrometer by use of fiber Bragg grating[J].OpticalEngineering,2003,42(11):3179-3181.
[10]刘士奎,张金涛,刘盛春.基于全光纤马赫-曾德尔干涉仪的微位移传感研究[J].光学与光电技术,2004,2(5):40-42.
[11]刘鸿文.简明材料力学[M].北京:高等教育出版社,1997.
[12]李方泽,刘馥清,王正.工程振动测试与分析[M].北京:高等教育出版社,1992.
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