分布式光纤光栅温度监测数据处理系统研究
发布时间：2019-02-25 13:31
【摘要】：随着近年来工业建设的快速发展,大型结构的健康监测越来越受到重视。分布式的传感网络能够对大型结构设备进行全面系统的监测。光纤光栅传感器基于波长编码,易于复用组网并且具有耐腐蚀、抗电磁干扰等优点,在众多不同种类的传感器中脱颖而出,由光纤光栅传感器组建的传感监测网络在桥梁构架监测、油田矿井安全监测、粮仓温度监测等领域具有广阔的应用前景。首先,论文主要对光纤光栅的传感解调技术进行了深入研究,介绍了光纤光栅的耦合模理论和布拉格光栅的温度传感原理,并阐述了分布式光纤光栅传感网络常用的复用技术和解调技术。其次,论文配合使用高精度光纤光栅解调仪搭建了分布式光纤光栅传感解调系统,详细介绍了光纤光栅解调仪的各组成部分的工作原理及传感网络采用的光栅复用技术。再次,论文设计了分布式传感网络监控的应用程序,重点编写了上位机软件,用户可以实时在线监测外界参量变化,存储参量变化信息,可以对参量进行数据分析。从分析需求到系统功能设计,简单介绍了编程语言及SQL Server数据库以及各部分功能的实现过程。最后,论文主要对分布式温度监测数据处理系统进行运行测试,利用自行编写的上位机软件对温度与波长关系进行标定,分析了实验中光栅的温度灵敏度,并对影响光纤光栅温度特性的因素进行归纳总结。
[Abstract]:With the rapid development of industrial construction in recent years, more and more attention has been paid to health monitoring of large-scale structures. Distributed sensor network can be used to monitor the large-scale structures and equipments in an all-round and systematic way. Fiber Bragg grating sensors based on wavelength coding, easy to reuse networking and has the advantages of anti-corrosion, anti-electromagnetic interference and so on, it stands out in many different kinds of sensors. The sensor monitoring network composed of fiber Bragg grating sensors has broad application prospects in the fields of bridge frame monitoring, mine safety monitoring in oil fields, temperature monitoring in granaries and so on. Firstly, the sensing demodulation technology of fiber grating is studied deeply, and the coupling mode theory of fiber grating and the temperature sensing principle of Bragg grating are introduced. The multiplexing and demodulation techniques commonly used in distributed fiber Bragg grating sensor networks are also described in this paper. Secondly, the distributed fiber grating sensing demodulation system is built by using the high-precision fiber grating demodulator. The working principle of each component of the fiber grating demodulator and the grating multiplexing technology used in the sensor network are introduced in detail. Thirdly, the application program of distributed sensor network monitoring is designed, and the software of host computer is designed. The user can monitor the change of external parameters on-line in real time, store the information of parameter change, and analyze the data of parameters. From the analysis requirement to the system function design, the programming language, the SQL Server database and the realization process of each part of the function are introduced in this paper. Finally, the paper mainly carries on the running test to the distributed temperature monitoring data processing system, calibrates the relationship between the temperature and the wavelength by using the computer software written by ourselves, analyzes the temperature sensitivity of the grating in the experiment, and analyzes the temperature sensitivity of the grating in the experiment. The factors affecting the temperature characteristics of fiber gratings are summarized.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN253;TP274.2
本文编号：2430231
[Abstract]:With the rapid development of industrial construction in recent years, more and more attention has been paid to health monitoring of large-scale structures. Distributed sensor network can be used to monitor the large-scale structures and equipments in an all-round and systematic way. Fiber Bragg grating sensors based on wavelength coding, easy to reuse networking and has the advantages of anti-corrosion, anti-electromagnetic interference and so on, it stands out in many different kinds of sensors. The sensor monitoring network composed of fiber Bragg grating sensors has broad application prospects in the fields of bridge frame monitoring, mine safety monitoring in oil fields, temperature monitoring in granaries and so on. Firstly, the sensing demodulation technology of fiber grating is studied deeply, and the coupling mode theory of fiber grating and the temperature sensing principle of Bragg grating are introduced. The multiplexing and demodulation techniques commonly used in distributed fiber Bragg grating sensor networks are also described in this paper. Secondly, the distributed fiber grating sensing demodulation system is built by using the high-precision fiber grating demodulator. The working principle of each component of the fiber grating demodulator and the grating multiplexing technology used in the sensor network are introduced in detail. Thirdly, the application program of distributed sensor network monitoring is designed, and the software of host computer is designed. The user can monitor the change of external parameters on-line in real time, store the information of parameter change, and analyze the data of parameters. From the analysis requirement to the system function design, the programming language, the SQL Server database and the realization process of each part of the function are introduced in this paper. Finally, the paper mainly carries on the running test to the distributed temperature monitoring data processing system, calibrates the relationship between the temperature and the wavelength by using the computer software written by ourselves, analyzes the temperature sensitivity of the grating in the experiment, and analyzes the temperature sensitivity of the grating in the experiment. The factors affecting the temperature characteristics of fiber gratings are summarized.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN253;TP274.2
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