基于ARM的光纤Bragg光栅地震观测系统的研究
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摘要
为满足地震观测系统对实时性、高精度以及网络化的要求,提出了基于光纤B ragg光栅传感器和ARM的嵌入式系统设计方案,阐述了可调光纤F-P滤波器的工作机理和特点,并介绍了基于FBG传感器和ARM的地震观测系统的硬件结构和软件设计。采用三星公司的S3C2440对经过可调谐F-P腔解调后的波长信息进行采集,并对得到的数据进行处理。实验结果表明,该系统在处理精度和实时性方面都能达到要求,性价比高,有一定实用价值。
To meet the needs of seismic observation system for real time,high accuracy and net-work processing for a seismic observation system,a design method for an embedded signal processing system based on microprocessor of ARM and fiber Bragg grating(FBG) sensors is provided.The characteristics of tunable fiber Fabry-Perot filter are analysed,and the hardware structure and software of the seismic observation system with fiber grating demodulation system and ARM are introduced.The S3C2440 is applied to realize the data acquisition of the FBG sensors,which acquires wavelength demodulated by tunable filter,and the data are analyzed and processed.The experiment results show that the system can satisfy requirements of processing accuracy and real-time' which has low-cost and high-efficieny properties.
To meet the needs of seismic observation system for real time,high accuracy and net-work processing for a seismic observation system,a design method for an embedded signal processing system based on microprocessor of ARM and fiber Bragg grating(FBG) sensors is provided.The characteristics of tunable fiber Fabry-Perot filter are analysed,and the hardware structure and software of the seismic observation system with fiber grating demodulation system and ARM are introduced.The S3C2440 is applied to realize the data acquisition of the FBG sensors,which acquires wavelength demodulated by tunable filter,and the data are analyzed and processed.The experiment results show that the system can satisfy requirements of processing accuracy and real-time' which has low-cost and high-efficieny properties.
引文
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[14]李立新,吴飞,蔡璐璐,等.光纤光栅法布里-珀罗应变传感器研究[J].传感技术学报,2006,19(3):807-809.LI Lixin,WUFei,CAI Lulu,et al.Study of fiber Bragg grating fabry-Perot strain sensor[J].Chinese Journal of Sensors and Actuators,2006,19(3):807-809.
[15]史永基,高雅利,叶芳.地震微观前兆预报网络系统设计研究(4)—网络系统设计[J].传感器世界,2009,15(12):6-18.SHI Yongji,GAO Yali,YE Fang.Study of design of the network system for earthquake micro precursor forecast-design of network system[J].Sensor World,2009,15(12):6-18.
[16]马超,乔学光,贾振安,等.光纤布拉格光栅地震检波器的研究与应用[J].地球物理学进展,2008,23(2):622-626.MA Chao,QIAO Xueguang,JIA Zhenan,et al.Research and application of fiber Bragg grating geophone[J].Progress in Geophysics,2008,23(2):622-626.
[2]Chan C C,Shi C Z,Gong J M,et al.Enhancement of the measurement range of FBG sensors in a WDMnetwork using a minimum variance shifttechnique coupled with amplitude-wavelength dual coding[J].Optics Communications,2003,215:289-29.
[3]Hill K O,Meltz G,Davis MA.Fiber Bragg grating technology fundamentals and overview[J].Journal of Lightwave Technology,1997,15(8):1263-1274.
[4]张国民.我国地震监测预报研究的主要科学进展[J].地震,2002,22(1):2-8.ZHANG Guomin.The main science advance of earthquake monitoring and prediction in China[J].Earthquake,2002,22(1):2-8.
[5]张桂欣,孙柏涛.多因素影响的建筑物群体震害预测方法研究[J].世界地震工程,2010,26(1):26-30.ZHANG Guixin,SUN Baitao.Amethod for earthquake damage prediction of building groups based on multiple factors[J].World Earthquake En-gineering,2010,26(1):26-30.
[6]项连清,李宏男,任亮,等.FBG传感器在碾压仿真混凝土大坝模型实验中的应用[J].世界地震工程,2006,22(4):27-34.XIANG Lianqing,LI Hongnan,REN Liang,et al.Experimental study on models of artificial roller compacted concrete dam by using FBG sensor[J].World Earthquake Engineering,2006,22(4):27-34.
[7]田石柱,赵雪峰,杨卫东.布拉格光栅传感器在土木工程中的应用[J].世界地震工程,2002,18(3):146-152.TIAN Shizhu,ZHAO Xuefeng,YANG Weidong.Applications of fiber Bragg grating sensor in civil engineering[J].World Earthquake Engineer-ing,2002,18(3):146-152.
[8]靳伟,阮双琛.光纤传感技术新进展[M].北京:科学出版社,2005:212-238.JIN Wei,RUAN Shuangchen,et al.The latest application of optic fiber sensor technique[M].Beijing:Science Press,2005:212-238.
[9]邓涛,寥成旺,丁炜,等.地形变测量中光纤传感新方法[J].大地测量与地球动力学,2008,28(6):132-136.DENG Tao,LIAO Chengwang,DING Wei,et al.Anewmethod of using optic fiber sensor in ground deformation measurement[J].Journal of Geod-esy and Geodynamics,2008,28(6):132-136.
[10]李营,张书练.基于可调谐F-P滤波器的光纤光栅解调系统[J].激光技术,2005,29(3):237-240.LI ying,ZHANG Shulian.A novel fiber Bragg grating sensor interrogation system utilizing a tunable Fabry-Perot filter[J].Laser Technology,2005,29(3):237-240.
[11]李耿民.嵌入式系统在地震观测系统中的应用[J].广西科学院学报,2003,11:264-270.LI Gengmin.Application of embedded system in seismic observation system[J].Journal of Guangxi Academy of Sciences.2003,11:264-270.
[12]张朋,孙宏志,张光虎,等.嵌入式系统在工程地震仪的应用研究[J].计算机与数字工程,2008,(2):137-139.SUN Peng,SUN Hongzhi,ZHANG Guanghu,et al.Application of embedded system in projecting earthquake device[J].Computer and DigitealEngineering[J].2008,(2):137-139.
[13]黄建辉,赵洋.光纤布拉格光栅传感器实现应力测量的最新进展[J].光电子激光,2000(11):217-220.HUANG Jianhui,ZHAO Yang.Progress in strain measurement with fiber Bragg grating sensor[J].Journal of Optoelectrionics Laser,2000,11:217-220.
[14]李立新,吴飞,蔡璐璐,等.光纤光栅法布里-珀罗应变传感器研究[J].传感技术学报,2006,19(3):807-809.LI Lixin,WUFei,CAI Lulu,et al.Study of fiber Bragg grating fabry-Perot strain sensor[J].Chinese Journal of Sensors and Actuators,2006,19(3):807-809.
[15]史永基,高雅利,叶芳.地震微观前兆预报网络系统设计研究(4)—网络系统设计[J].传感器世界,2009,15(12):6-18.SHI Yongji,GAO Yali,YE Fang.Study of design of the network system for earthquake micro precursor forecast-design of network system[J].Sensor World,2009,15(12):6-18.
[16]马超,乔学光,贾振安,等.光纤布拉格光栅地震检波器的研究与应用[J].地球物理学进展,2008,23(2):622-626.MA Chao,QIAO Xueguang,JIA Zhenan,et al.Research and application of fiber Bragg grating geophone[J].Progress in Geophysics,2008,23(2):622-626.
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