非本征法珀型超声传感器输出信号的特征
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摘要
根据多光束干涉原理制备了非本征光纤法珀(FP)型传感器,用于测量在液体中传播的超声波,分析了传感器灵敏度和幅频特性的影响因素,研究了其输出信号的特征。用镀膜的石英膜、尾纤端面和空气腔形成FP干涉腔。建立了传感器参数确定的方法,对石英膜的幅频特性进行了理论分析和实验验证。最后,建立了非本征光纤FP超声测量系统,讨论和验证了不同工作点状态对系统输出信号特征的影响。实验结果表明,本文制备的非本征法珀型超声传感器可以进行液体中超声的测量;传感器的一阶谐振频率为140 kHz,灵敏度为0.005 nm/Pa。该传感器的输出信号特征决定于工作点状态及输入信号的调制深度,当工作点位于工作曲线的线性区中点时,输出信号的灵敏度最高;当过调制时,输出信号出现倍频,可以扩大测量范围。
Based on multi-beam interference principle,an extrinsic fiber Fabry-Perot(FP) sensor was developed to measure the acoustic signal in liquid,whose interference cavity was consisted of quartz diaphragm,end of pigtail and air film.The sensitivity,amplitude-frequency and the output signals of the sensor were analyzed.The parameters of FP sensor were obtained to analyze amplitude-frequency characteristics of quartz diaphragm theoretically and experimentally.Finally,a measurement system on acoustic signals in water was developed and the effect of operation points on output signals were discussed and tested in different conditions.The experimental results indicate that the extrinsic fiber FP acoustic sensors in proposed system are able to measure acoustic signal in the liquid.Its fundamental frequency can reach to 140 kHz and sensitivity is 0.005 nm/Pa.The characteristics of output signal of the sensors are dependent on operational points and modulation depths of input signal.The sensitivity of the sensor is optimial when the operational points lie in quadrature point of operation curve.the measurement region will be increased when the output signal is frequency double for over modulation.
Based on multi-beam interference principle,an extrinsic fiber Fabry-Perot(FP) sensor was developed to measure the acoustic signal in liquid,whose interference cavity was consisted of quartz diaphragm,end of pigtail and air film.The sensitivity,amplitude-frequency and the output signals of the sensor were analyzed.The parameters of FP sensor were obtained to analyze amplitude-frequency characteristics of quartz diaphragm theoretically and experimentally.Finally,a measurement system on acoustic signals in water was developed and the effect of operation points on output signals were discussed and tested in different conditions.The experimental results indicate that the extrinsic fiber FP acoustic sensors in proposed system are able to measure acoustic signal in the liquid.Its fundamental frequency can reach to 140 kHz and sensitivity is 0.005 nm/Pa.The characteristics of output signal of the sensors are dependent on operational points and modulation depths of input signal.The sensitivity of the sensor is optimial when the operational points lie in quadrature point of operation curve.the measurement region will be increased when the output signal is frequency double for over modulation.
引文
[1]刘跃辉,张旭苹,董玉明.光纤压力传感器[J].光电子技术,2005,25(2):124-132.LIU Y H,ZHANG X P,DONG Y M.Review of fiber-optic pressure sensors[J].Optoelecfronic Technology,2005,25(2):124-132.(in Chinese)
[2]李智忠,周伟林,杨华勇,等.非平衡干涉检测光纤光栅高频振动传感研究[J].光通信研究,2004,(5):55-57.LI ZH ZH,ZHOU W L,YANG H Y,et al..High frequency vibration measurement with fiber grating sensing basedon unmatched interferometer[J].Study On Communications,2004,(5):55-57.(in Chinese)
[3]MACI-SANAHUJA C,LAMELA H.Development and characterization of fiber optic hydrophone coils for the de-tection of ultrasonic signals within power transformers[J].SPIE,2006,6189:1-8.
[4]张燕君,陈才和,吴波,等.硅微光机械加速度地震检波器中M-Z光波导干涉仪结构设计[J].光学精密工程,2006,14(1):77-82.ZHANG Y J,CHEN C H,WU B,et al..Structure design of Mach-Zehnder interferometer in electrooptic integratedacceleration seismic geophone[J].Opt.Precision Eng.,2006,14(1):77-82.(in Chinese)
[5]王泽锋,罗洪,熊水东,等.基于光频调节的干涉型光纤水听器相位补偿检测方法[J].光学学报,2007,27(4):654-658.WANG Z F,LUO H,XIONG SH D,et al..Phase compensating detection method of interferometric Fiber-Optic hy-drophones based on tuning the frequency of the laser[J].Acta Optica Sinica,2007,27(4):654-658.(in Chinese)
[6]江毅,肖尚辉.Sagnac干涉型水听器的信号解调技术[J].测试技术学报,2004,18(3):200-202.JIANG Y,XIAO SH H.The demodulation techniques for Sagnac interferometer based hydrophone[J].Journal ofTest and Measurement Technology,2004,18(3):200-202.(in Chinese)
[7]朱海,李智忠,孙荣光,等.高灵敏度光纤光栅水下压力传感研究[J].光电子.激光,2007,18(5):536-538.ZHU H,LI ZH ZH,SUN R G,et al..Research on fiber grating under water pressure sensing with high sensitivity[J].Journal of Optoelectronics.Laser,2007,18(5):536-538.(in Chinese)
[8]康崇,张树全,黄宗军,等.模式分裂对法布里-珀罗型光纤水听器谐振曲线的影响[J].光学学报,2007,27(1):155-158.KANG CH,ZHANG SH Q,HUANG Z J,et al..Influence of mode split upon resonance curve of Fabry-Pérot opti-cal fiber hydrophone[J].Acta Optica Sinica,2007,27(1):155-158.(in Chinese)
[9]WANG A B,MILLER M S,PLANTE A J,et al..Split-spectrum intensity-based optical fiber sensors for measure-ment of microdisplacement,strain,and pressure[J].Applied Optics,1996,35(15):2595-2601.
[10]范少卿,郭富昌.物理光学[M].北京:北京理工大学出版社,1990.FAN SH Q,GUO F CH.Physical Optics[M].Beijing:Beijing Institute Technology Press,1990.(in Chinese)
[11]江理平.工程弹性力学[M].上海:同济大学出版社,2002.JIANG L P.Engineering Elastic Mechanics[M].Shanghai:Tongji University Press,2002.(in Chinese)
[2]李智忠,周伟林,杨华勇,等.非平衡干涉检测光纤光栅高频振动传感研究[J].光通信研究,2004,(5):55-57.LI ZH ZH,ZHOU W L,YANG H Y,et al..High frequency vibration measurement with fiber grating sensing basedon unmatched interferometer[J].Study On Communications,2004,(5):55-57.(in Chinese)
[3]MACI-SANAHUJA C,LAMELA H.Development and characterization of fiber optic hydrophone coils for the de-tection of ultrasonic signals within power transformers[J].SPIE,2006,6189:1-8.
[4]张燕君,陈才和,吴波,等.硅微光机械加速度地震检波器中M-Z光波导干涉仪结构设计[J].光学精密工程,2006,14(1):77-82.ZHANG Y J,CHEN C H,WU B,et al..Structure design of Mach-Zehnder interferometer in electrooptic integratedacceleration seismic geophone[J].Opt.Precision Eng.,2006,14(1):77-82.(in Chinese)
[5]王泽锋,罗洪,熊水东,等.基于光频调节的干涉型光纤水听器相位补偿检测方法[J].光学学报,2007,27(4):654-658.WANG Z F,LUO H,XIONG SH D,et al..Phase compensating detection method of interferometric Fiber-Optic hy-drophones based on tuning the frequency of the laser[J].Acta Optica Sinica,2007,27(4):654-658.(in Chinese)
[6]江毅,肖尚辉.Sagnac干涉型水听器的信号解调技术[J].测试技术学报,2004,18(3):200-202.JIANG Y,XIAO SH H.The demodulation techniques for Sagnac interferometer based hydrophone[J].Journal ofTest and Measurement Technology,2004,18(3):200-202.(in Chinese)
[7]朱海,李智忠,孙荣光,等.高灵敏度光纤光栅水下压力传感研究[J].光电子.激光,2007,18(5):536-538.ZHU H,LI ZH ZH,SUN R G,et al..Research on fiber grating under water pressure sensing with high sensitivity[J].Journal of Optoelectronics.Laser,2007,18(5):536-538.(in Chinese)
[8]康崇,张树全,黄宗军,等.模式分裂对法布里-珀罗型光纤水听器谐振曲线的影响[J].光学学报,2007,27(1):155-158.KANG CH,ZHANG SH Q,HUANG Z J,et al..Influence of mode split upon resonance curve of Fabry-Pérot opti-cal fiber hydrophone[J].Acta Optica Sinica,2007,27(1):155-158.(in Chinese)
[9]WANG A B,MILLER M S,PLANTE A J,et al..Split-spectrum intensity-based optical fiber sensors for measure-ment of microdisplacement,strain,and pressure[J].Applied Optics,1996,35(15):2595-2601.
[10]范少卿,郭富昌.物理光学[M].北京:北京理工大学出版社,1990.FAN SH Q,GUO F CH.Physical Optics[M].Beijing:Beijing Institute Technology Press,1990.(in Chinese)
[11]江理平.工程弹性力学[M].上海:同济大学出版社,2002.JIANG L P.Engineering Elastic Mechanics[M].Shanghai:Tongji University Press,2002.(in Chinese)
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