商用车维修服务链关键技术研究

Research on Key Technologies of Service Chain for Commercial Vehicle Maintenance

作为构建商用车维修服务链的关键设备,设计了一种基于J1939协议的车载商用车故障诊断系统;该系统扩展了传统车载故障诊断系统,利用无线通讯技术将采集到的J1939车辆故障信息和GPS定位信息实时上传至车辆监控中心;目标是实现商用车车辆动态监控、故障诊断和预警以及车辆维修保养服务的网络协同管理;系统以Cortex-A8为主控制器和嵌入式Linux为平台,包括故障采集与分析模块,利用Qt设计用户界面;经多次测试实验,故障诊断快速准确,无线传输数据实时性强,丢包率低。

As a key equipment in the construction of commercial vehicle maintenance service chain, a fault diagnosis system based on J1939 protocol is designed. The system extends the conventional on-- board fault diagnosis system, and uses the wireless communication technology to upload the J1939 vehicle fault messages and GPS location information to the vehicle monitoring center in real time. The goal is to design a full vehicles service network for vehicles monitoring, fault diagnosis and prediction. The system takes Cortex--A8 as the main controller and the embedded Linux as the platform, including the fault collection and analysis module. Qt is used to design the user interface. After repeated testing, the fault diagnosis can be done fast and accurately, and the wireless transmission data is transmitted real--timely and the packet loss rate is low.