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光纤Bragg光栅温度压强检测系统研究
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摘要
光纤Bragg光栅传感器,作为一种新型传感器,具有抗电磁干扰、绝缘性能好、抗腐蚀、灵敏度高、体积小、重量轻、测量范围广等优点,光纤Bragg光栅传感器的测量准确度不受强波动和光损耗的影响,可实现分布式测量系统和波分复用传感网络。光纤Bragg光栅传感器通过光的变化来拾取被测信号,这种传感器非常适用易燃易爆的石油化工领域。因此,光纤Bragg光栅传感器在石油化工领域具有广泛的应用前景。
     本文在对国内外光纤光栅传感技术及其解调方案进行深入研究的基础上,提出一种以STC89C516RD单片机为核心处理器,结合可调谐F-P腔光滤波技术的光纤Bragg光栅温度压强检测系统方案。
     本文首先阐述了光纤Bragg光栅传感的基本原理,并对目前常用的解调方法进行了深入的研究分析。改进了原有的解调方案,设计了以光纤Bragg光栅为敏感器件,采用放大自发辐射光源(ASE),并结合先进的可调谐F-P腔光滤波技术构成的光路系统。本论文重点研究和设计了光纤Bragg光栅传感器信号检测电路系统。采用斩波稳零集成运算放大电路ICL7650,自行设计了一款高增益、高稳定和低漂移的放大电路,有效的克服了干扰信号的输入,提高了信号的准确度。本文基于台湾宏晶科技公司的STC89C516RD微控制器设计了检测系统的控制和信号处理系统,包括电源电路、复位电路、显示电路及RS-232电路等微控制器外围扩展电路。本文设计了一种基于压电陶瓷的电信号解调单元,采用了美国模拟数字公司最新推出的16位D/A转换电路芯片AD669,有效的提高了系统的扫描精度。实验表明,本研究设计的光纤Bragg光栅温度压强检测系统是一种非常好的检测方法。
The fiber-optic Bragg light grid spreads a feeling machine, as a kind of machine that is new to spread feeling, have anti- electromagnetism interference and insulate function well, anti- corrosion, intelligent degree Gao, small physical volume and light weight, measure scope widely etc. advantage, fiber-optic Bragg only the grid spread an accurate degree of the diagraph of feeling machine the influence that is only free from strong motion and exhausts, can carry out the distribute type diagraph system and wave to reply to use to spread a feeling network for cent.Fiber optic light grid's spreading a feeling machine and passing bare variety to pick up is measured signal, this kind of spreads the petroleum chemical engineering that the feeling machine applies easy Ran very much and easily explodes realm.Therefore, the fiber-optic Bragg light grid spreads a feeling machine to have in the petroleum chemical engineering realm extensive of applied prospect.
     This text puts forward in spreading feeling technique and its solution to adjust a project to carry on the foundation that goes deep into a research to the domestic and international fiber optic light grid a kind of with STC89 C516 RD+list slice machine for core processor, combine an adjustable chamber of Xie F-P to only filter fiber-optic Bragg of wave technique light the grid temperature press strong examination system project.
     This text elaborated first that the fiber-optic Bragg light grid spreads the basic principle of feeling, and adjusted a method to carry on thorough research analysis currently to the in common use solution.Improved an original solution to adjust a project, design with fiber-optic Bragg light grid for sensitive spare part, the adoption enlarges self-moving radiation light source(ASE), and combine the forerunner's adjustable chamber of Xie F-P to only filter a light road that technique constitutes system.This thesis point research and design fiber-optic Bragg light the grid spread a feeling machine signal examination electric circuit system.The adoption cuts one steady zero integration the operation enlarge the electric circuit ICL7650 and designed the electric circuit of enlarging of Gao Zeng Yi, tall stable and low drift by oneself, effectively overcame the importation of interference signal and raised the accurate degree of signal.This text according to the STC89 C516 of the Taiwan great crystal science and technology company RD+the tiny controller designed control and signal of examination system to handle system, including the power electric circuit, reset electric circuit and show that the tiny controller outer circles, such as electric circuit and electric circuit RS-232...etc. expands electric circuit.This text designed 1 kind according to press the solution telecommunication of electricity porcelain and ceramics to adjust unit, adopted the United States to imitate number companies to lately release of 16 Ds|A conversion the electric circuit chip AD669, effectively raised the scanning accuracy of system.The experiment expresses that fiber-optic Bragg designing this research light grid temperature's pressing strong examination system is a kind of very nice examination method.
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