CAN总线使用率和故障侦测系统设计研究

CAN Bus Utilization and Fault Detection System

本文实现了一种通过采集CAN总线物理层通信波形,不需要复杂的CAN通信协议解码过程,分析CAN总线故障和使用率的侦测系统,并输出相关故障预警信息。通过采样、识别和分析总线数据帧信息,测量总线使用率并进行一系列比较,输出总线故障预警信号,实时监测CAN总线的工作状态和故障侦测。具体内容包含系统实现原理和方案,并详细讨论CAN总线数据帧提取、使用率测量和异常监测方法。实际运行效果表明:该系统结构合理、性能稳定、准确性高,具有广阔的应用前景。

In this paper,a detection system for CAN bus faults and usage rate is realized by collecting communication waveforms in physical layer of CAN bus,which does not need complicated decoding process of CAN communication protocol,and outputs relevant fault warning information.By sampling,identifying and analyzing the bus data frame information,the bus utilization rate is measured and a series of comparisons are made.The bus fault warning signal is output,and the working state and fault detection of CAN bus are monitored in real time.The specific content includes the principle and scheme of the system,and discusses in detail the methods of CAN bus data frame extraction,usage measurement and anomaly monitoring.The actual operation results show that the system has reasonable structure,stable performance and high accuracy,and has broad application prospects.