布拉格光纤光栅传感器解调技术研究.pdf

烟台大学
硕士学位论文
布拉格光纤光栅传感器解调技术的研究
姓名:王正华
申请学位级别:硕士
专业:信号与信息处理
指导教师:杨尚明
2011-04
摘要
光纤光栅(FBG)是一种新型的传感器,它不易受电磁干扰影响,质量轻、易
弯曲可以在易燃易爆等恶劣的环境下使用。
本文在比较了众多的解调方案后提出了利用 F-P 滤波器的解调方案。本系统主
要包括:宽带光源模块、F-P 滤波器驱动电路、光电探测器、ARM7 处理器模块以及
上位机系统。本课题在设计出 F-P 滤波器驱动电路和光电探测电路的基础上,实现
了光信号到电信号的转换。在软件系统中采用实时性良好的μC/OS-II 操作系统,
将μC/OS-II 操作系统移植到飞利浦公司 ARM7 系列处理器的 LPC2114 芯片上,
并在此基础上实现了数据采集和传输。基于 Labview 软件的编程优势,在上位机系
统中利用 Labview 软件开发平台将 ARM 处理器采集的数据转换为温度值并得到显
示。

关键词:F-P 滤波器 ARM7 μC/OS-II 数据采集处理 Labview















I
Abstract
As a kind of new sensing methods, Fiber Bragg grating (FBG) has been widely used,
particularly suitable of flammable, explosive and other harsh environments because of its
anti-ic interference, small size, easy to bend.
This paper proposed the demodulation of using FP filter paring a large number of
demodulations. The system includes broadband light source module F-P filter driver
circuit photoelectric signal detection ARM7 processor and PC System. The system
realized the conversion of optical signal to electrical signal based on the design of the FP
filter driver circuit and detection circuit. The system used μC / OS-II operating system as
the software system depending on its real-time. The system realized data collection and
transmission based on the transplanting the μC / OS-II to the chip of LPC2114 of ARM7
family processor. The data collected by ARM processor were converted to temperature
values and were displayed through the Labview software development platform in the host
computer system depending on the advantages of programming on the Labview software
development platform.

Key words: F-P filter ARM7 μC / OS-II data collection and processing











II
烟台大学硕士学位论文
1 绪论
选题背景
光纤光栅作为光纤无源器件之一在最近几年得到了飞速的发展。1978 年,
等科学家们在加拿大首都渥太华的通信实验研究中心,首次在掺锗石英光
纤中发现了光纤的光敏效应并且通过驻波写入的方法制成世界上第一只光纤光栅,
1993 年他们又首次提出了相位掩膜的制造方法,利用这种方法使得光纤光栅的大规
模制造成为可