光学技术, 2016, 42 (5): 441, 网络出版: 2016-10-19   

基于粗时分复用技术的光纤光栅传感系统研究

Study on fiber Bragg grating sensing system of rough time division multiplexing technology
作者单位
燕山大学信息科学与工程学院, 河北省特种光纤与光纤传感重点实验室, 河北 秦皇岛 066004
摘要
充分利用光纤光栅传感网络的频域和时域资源, 综合考虑了光栅传感环境特点、传感点铺设和维护等因素, 提出了一种新型的基于粗时分复用的TDM/WDM光纤传感网络设计方案。先按时分复用方式将光纤传感环境划分成不同时延的传感域, 再将域内传感点按波分复用方式进行波分复用, 并结合网络拓扑结构分析了网络中的影响测量结果的主要因素。方案引入了传感域和时延容差概念, 可以放宽对传感点精确位置的要求, 可对传感网进行分域管理, 便于替换死亡的传感器, 更加方便、简洁地实现大容量光纤光栅传感系统, 可依据器件具体情况灵活分配传感域内域外的传感器复用数, 使每个传感单元的传感成本显著降低。
Abstract
Considering the grating sensing environmental characteristics, sensing point laying, sensors maintaining and so on, a novel TDM/WDM optical fiber sensing network is proposed based on rough time division multiplexing which make full use of the FBG sensor networks in frequency domain and time domain resources. The fiber sensing network is firstly separated into different time regions on time division multiplexing, and then the sensors on wavelength division multiplexing are divided. The main influence factors of the measurement result are analyzed based on the network topology. The concept of sensing domain and time delay tolerance are presented in the scheme, which the requirement of the precise location of the sensing point is relaxed. It makes it easy to replace the dead sensor, and more convenient to realize large capacity optical fiber grating sensing system. It is more flexible to distribute the numbers of sensors in the different sensing domains so that it reduces the cost of the sensing networks.

王玉宝, 刘亚冲. 基于粗时分复用技术的光纤光栅传感系统研究[J]. 光学技术, 2016, 42(5): 441. WANG Yubao, LIU Yachong. Study on fiber Bragg grating sensing system of rough time division multiplexing technology[J]. Optical Technique, 2016, 42(5): 441.

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