一种基于FPGA的实时光纤环网通信技术

FPGA-based Real-time Communication of Fiber Ring-net

针对多变流器系统中控制系统通信拓扑架构的难题,文章提出了一种基于FPGA的实时光纤环网通信技术,采用单向光纤环网拓扑大幅提高了控制器通信端口设备扩展能力;同时,通过采用基于曼彻斯特编码的复合型长数据帧结构、节点自动延迟补偿、从节点自动排序数据上传、节点自动递增编址等技术,解决了传统环网在通信效率、数据延迟、动作一致性和地址管理等方面存在的问题。通过所搭建的三变流器光纤环网实验平台,验证了设计方案的有效性和安全性。

It proposed a kind of fiber ring-net which adopts ring topology to solve the problem of the communication topology for multi-converter control unit. The method can also enhance the extension ability of the control unit. Meanwhile, a ring-net protocol was presented using a series of technology including bounded frame, automatic delay compensation, bit synchronization, slave automatic queue response, auto-increasing addressing to the problem of communication efficiency, data delay, action synchronization and slave address management for the previous ring-net. Finally, an experimental fiber ring-net platform including three converters was established to prove the feasibility of the proposed algorithm