Integrated real-time monitoring system for strain/temperature distribution based on simultaneous wavelength and time division multiplexing technique

被引：22

作者：

Dai, Yongbo ^{[1
]}

Li, Peng ^{[1
]}

Liu, Yanju ^{[2
]}

Asundi, Anand ^{[3
]}

Leng, Jinsong ^{[1
]}

机构：

[1] Harbin Inst Technol, Ctr Composite Mat & Struct, Harbin 150080, Peoples R China

[2] Harbin Inst Technol, Dept Aerosp Sci & Mech, Harbin 150001, Peoples R China

[3] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore

来源：

OPTICS AND LASERS IN ENGINEERING | 2014年 / 59卷

基金：

中国国家自然科学基金;

关键词：

Fiber Bragg grating sensors; Wavelength division multiplexing; Time division multiplexing; Strain/temperature field distribution; GRATING SENSORS;

D O I：

10.1016/j.optlaseng.2014.02.011

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Based on the combination of wavelength- and time-division multiplexing technique, a novel fiber Bragg grating (FBG) sensor multiplexing system is proposed, which can be used for monitoring the twodimensional strain and temperature field distribution in large structures. The FBG sensing unit is encoded simultaneously in both wavelength and time domains. Using the semiconductor optical amplifier (SOA) resonant cavity technology, a large capacity multiplexing technology with mixed time-division and wave-division multiplexing (TDM+WDM) is presented. The sensor array contains many groups with each group composed of many sensors. The group is addressed by TDM mode and each sensor of the groups is accessed by WDM mode. Therefore, the total multiplexing capacity is multiplication of TDM and WDM. In theory, more than 1000 sensors can be multiplexed on one single fiber. The feasibility of the scheme was experimentally demonstrated through a sensor system with a two dimensional FBG sensing network with 5 x 5 sensors arrays. In addition, the strain/temperature distribution in an aluminum plate was measured at real time under different loading/heating by using above FBG sensing network. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：19 / 24

页数：6

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