基于Modbus协议的数据采集与并行加密通信系统

摘要

为了高效、集中地监控工业设备的运行情况,设计了基于Modbus的数据采集监控系统.提出将设备管理从数据采集系统分离出来,降低动态更改设备对数据采集系统的影响,提高设备管理的便捷性.该系统引入断线自动重连机制,提升了系统的稳定性.探讨传统SM4加密算法的优缺点,提出改进的SM4加密算法,提高了安全性.结合算法的结构特点与GPU的并行计算能力,设计了基于GPU的SM4并行数据加密算法,并将该算法应用到数据采集系统中,提高了数据传输过程中的实时性.%A data acquisition monitoring system based on Modbus is designed to monitor the running condition of industrial plant efficiently and centrally.The device management is separated from the data acquisition system in order to reduce the effects of dynamically changing equipment for data acquisition program and improve the convenience of equipment management.When this system is off line, it will be reconnected automatically, which improves its stability.Then, the advantages and disadvantages of traditional SM4 encryption algorithm are discussed and an improved SM4 encryption algorithm is proposed, which improves the security.Combining the structure characteristics of algorithm with the GPU parallel computing ability, an improved SM4 parallel data encryption algorithm based on GPU is designed.And the algorithm is applied to the data acquisition system, improving the real-time performance of data transmission.