第28卷第3期
传感技术学报
Vol 28 No
2015年3月
CHINESE JOURNAL OF SENSORS AND ACTUATORS
Mar.2015
The Demodulation Technique of Fiber Grating Sensor Base on
Multi Order Diffraction and Adaptive Compensator
ZHANG Xiaopeng, DONG Mingli, LLU Feng, ZHU Lianqing
Beijing Key Laboratory for Optoelectronics Measurement Technology, Beijing Engineering Research Center of Optoelectronic
Information and Instruments, Beijing informaton Science and Technology Univesity, Beijing 100192, China
Abstract: Optical fiber grating sensor has been promoted with the wide application of optical fiber grating sensors
demodulation system. The demodulation technology has become a key factor of system speed, precision, capacity and
other properties. This paper presents a kind of optical fiber grating sensor demodulation technique based on the prin
ciple of linear image sensor, Many problems of demodulation has been solved by multi order diffraction, weak expo
sure adaptive overclocking technology, FPGA parallel data processing technology. All of the te
echnorogv focus on lm.
proving the speed of demodulation. the accuracy of demodulation and the Miniaturization. Experiments show that, our
system can improve the demodulation precision up to 10 pm, and the spectrum range of demodulation up to 50 nm, It
can also demodulate the cascaded fiber Bragg grating sensor and the long period fiber grating sensor
Key words: optical fiber grating sensor; linear image sensor; multi order diffraction; adaptive overclocking technology
FPCA demodulation
EEACC. 7230G
doi;10.3969/j.issn,1004-1699.2015.03.006
基于多级衍射及自适应补偿的
光纤光栅传感器解调技术
张晓鹏,董明利
锋,祝连庆”
(北京信息科技大学光电信息与仪器北京市工程研究中心,光电测试技术北京市重点实验室,北京100192)
摘要:解调技术是决定
光纤光栅传感解调系统速率、精度、容量等性能的关键因素。提出一种基于线阵光电探测器成像原
理的光纤光栅传感器解调方案,通过多级衍射,结合弱曝光自适应超频技术和FPCA并行数据处理技术,实现了对传感信号的
决速解调,同时可以实现对级联型光纤光栅传感器和长周期光纤光栅传感器信号的解调。使用温度、应力敏感光纤光栅传感
器对搭建的铁路桥模型进行监测,实验结果表明,光纤光栅传感系统的解调精度可以达到10pm量级,系统可测量光谱范围达
50nm,提高了传感系统的解调速率和精度,同时实现∫光纤光栅解调设备的微型化。
关键词:光纤光栅传感器;线阵光电探测器;多级衍射;自适应补偿;FPCA解调
中图分类号:TP212.9;TP216+.1;TN29
文献标识码:A
文章编号:1004-1699(2015)03-0330-06
传统的传感器及其解调技术在常规领域内得到瞩目,其中美国 Micron Optics公司, Ocean Optics公
了广泛的应用,但是对于一些特殊、极端环境,如航司, Ibsen公司和荷兰 Avantes公司都在开展相关研
空航天、航海、医疗以及石化等特殊工业,普通的传究。其中光路设计方面主要采用基于光纤Fabn
感器已经无法满足如此极端环境的要求。为解决这 Perel(F-P)滤波器解调法2和基于衍射光栅与线阵
样的问题,光纤光栅传感器应运而生。
光电探测器解调法。 Fabry- Perot(F-P)滤波器解调
近年来光纤光栅传感器及其解调仪的硏究备受法是现在效果较好的一种解调方法,而其存在诸多弊
项目来源:北京市重大科技计划项目(PXM2013-014224-00001,PXM2012-014224-00009);光电信息与仪器北京市工程研
究中心开放课题项目(GD20130006
收稿日期:2014-08-25修改日期:2014-12-11
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