基于GPON的光纤光栅传感信号接入节点研究

摘要

借助现有GPON通信网将光纤光栅传感信号传输到远程监控中心,可避免大规模铺设专用传感网,组网灵活,降低成本开销.实现光纤传感网与GPON接入网的融合,传感子网与GPON之间的接入节点设计是关键问题之一.接入节点采用固定时分多址技术接入各传感子网信号并将其组装成传感复用帧,此帧结构的设计减少了GEM帧负载部分的控制开销比特数,为远程监控中心提取有用的传感信息节省了时间,使光纤光栅传感信号在高速的通信网中有效传输.%Transmitting fiber grating sensing signal to remote monitoring center by existing GPON communication network can avoid laying large-scale special sensing nets, reduce cost, and form network flexibly. In order to merge multiple optical fiber grating sensing nets with GPON, design of access node between sensing subnets and GPON is one of the key problems. Access node accesses sensing subnets signal by adopting TDMA technology, and data of subnets are assembled into multiplexed sensing frame. Design of the frame structure reduces the bit number of control overhead of the load of the GEM frame, saves time for remote monitoring center to extract useful sensing information and makes optical fiber grating sensor signals transmit effectively in high-speed communications network