摘要
为有效提高光栅复用容量,提出了一种分布式光纤布拉格光栅传感网络方案,并进行了实验。方案中传感解调模块以TDM方式与多个传感通道相连通,利用传感通道选择光链路以时分复用方式实现传感解调端对多个传感通道的开关控制,以时分/波分相结合的机制对分布式传感量进行解调。在实验验证系统中,基于匹配光纤光栅解调方案下,以2.5 Hz的循环测试频率,多次测量同一FBG(fiber bragg grating)周期,测得系统的解调精度为±0.06 nm,具有较好的重复测量稳定性。结果表明,方案结构简单可行性好且具有良好的可升级扩展性。
In order to effectively improve the capacity of grating multiplexing, a scheme of distributed fiber bragg grating sensor network based on time division multiplexing （TDM） demodulation mode was proposed and demonstrated. The wavelength demodulation module connected one of the sensor channels in the TDM mode, realized the sensing demodulation end using the sensing port select light link by the multiplying way to many sensing channels＇ stop-go control, and demodulated the wavelengths of the FBG sensors. In the experimental verification system, and based on the match fiber grating demodulation plan, the identical FBG cycle was measured many times with the 2.5 Hz rotational test frequency. The system demodulation precision was ±0.06 nm. The results show that the scheme is feasible and prominent in extensible characteristic with good repeated measurement stability, which is helpful for designing high performance FBG sensor network.
出处
《解放军理工大学学报（自然科学版）》
EI
北大核心
2009年第5期430-434,共5页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
国家863计划资助项目(2007AA01Z243)
国家科技支撑计划子课题资助项目(2007BAK30B02)
关键词
时分复用
光纤光栅
分布式光栅传感网络
一维调节器
步进电机
TDM（time division multiplexing）
FBG（fiber Bragg grating）
distributed FBG sensor network
one-dimensional adjustor
step motor
