基于软件实现的RS485总线电气层故障注入仪设计  

Design of RS485 Bus Electrical Layer Fault Injection Instrument Based on Software Implementation

作　　者：姚雪美 洪应平[1] 党立志 高晨程 YAO Xuemei;HONG Yingping;DANG Lizhi;GAO Chencheng(State Key Laboratory of Electronic Measurement Technology,North University of China,Taiyuan Shanxi 030051,China)

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051

出　　处：《电子器件》2025年第1期55-59,共5页Chinese Journal of Electron Devices

摘　　要：为了满足工业控制系统通信时的测试验证要求,结合RS485总线通信特征,设计了一种基于软件注入电气层故障的故障注入系统。系统满足设备通信的故障测试,通过软件模拟电气层信号故障,采用FPGA主控芯片、高速A/D、D/A辅助差分信号输入输出和指令解析,最终实现了对RS485总线信号的故障注入。实践表明,基于软件的故障注入仪灵活性高,适用性强,且精度更高。In order to meet the testing and verification requirements of industrial control system communication,a fault injection system based on software injection of electrical layer faults is designed by combining the communication characteristics of RS485 bus.The system meets the fault testing of device communication,simulates electrical layer signal faults through software,uses FPGA main control chip,high-speed A/D,D/A auxiliary differential signal input and output,and instruction parsing,ultimately achieving fault injection of RS485 bus signals.Practice has shown that software based fault injection instrument has high flexibility,strong applicability,and higher accuracy.

关 键 词：故障注入 嵌入式 测试系统 RS485 

分 类 号：TN407[电子电信—微电子学与固体电子学]