联合损伤影响下直读式光纤燃气计量表光信号脉宽研究

Research on Pulse Width of Optical Signal of Direct Reading Fiber Optic Gas Meter under the Influence of Joint Damage

综合考虑GVD和SPM两种损伤联合影响,针对直读式光纤燃气计量表通信单元提出光信号脉宽模型,并借助仿真技术将该模型应用到了基于物理损伤联合影响的光信号传输过程中。结果表明:相比最短路径算法,最小损伤路径算法采用本文提出的信号脉宽模型可以正确选择损伤最小的路径传输连接请求,增加了信号可用度;相比GVD单独作用,SPM与GVD同时作用时的网络选路,考虑了脉冲展宽的相互影响,有助于选择最小的损伤路径,降低直读式光纤燃气计量表连接请求的阻塞率。

This article comprehensively considers the combined effects of GVD and SPM damage, proposes an optical signal pulse width model for the direct-reading optical fiber gas meter communication unit, and uses simulation technology to apply the model to the optical signal transmission process based on the combined impact of physical damage middle. The results show that: compared with the shortest path algorithm, the minimum damage path algorithm adopts the signal pulse width model proposed in this paper to correctly select the path with the least damage to transmit the connection request, which increases the signal availability;compared to GVD acting alone, when SPM and GVD act at the same time The network selection of the network takes into account the mutual influence of pulse broadening,which helps to select the least damage path and reduces the blocking rate of the direct-reading fiber optic gas meter connection request.