【作者】 李想；

【导师】 殷国栋； 董钊志；

【作者基本信息】 东南大学 ， 车辆工程， 2021， 硕士

【摘要】 随着社会大众认知的增长,新兴科学技术的创新及全球资源储备消耗严重等各个因素的影响,未来汽车将会往电子电器、车联网、自动驾驶和共享出行等方向高速发展,汽车电子控制单元的数量和运算能力需求也都会随着这些新兴技术的发展呈现出爆发式的增长。车辆电子电器架构的进化不仅增加了汽车电子系统的复杂程度,对车辆总线的通讯方式也提出了更高的要求。在汽车制造的过程中,总装车间作为车辆生产的最后一道工序,其运行状态直接影响了生产效率、整车质量和交付要求,整车的电子电器质量又是总装车间的重要指标之一。目前国内主机厂下线(EOL End Of Line)诊断检测系统这一专业领域还处于起步阶段,车辆电子电器下线检测集中在人工检测和由供应商质量保证,传统的检测手段对人员的依赖性过高,生产的效率无法支持复杂电器的检测需求,导致电子电器的质量难以得到有效的监控。本文根据总装车间的相关需求,针对以上问题设计了一套下线诊断检测系统,实现对于电气电器功能的有效检测和监控,同时可以满足未来电子电气架构升级带来的诊断需求。本论文设计的车辆下线诊断系统能够有效地提高生产效率,解决传统方式下人员检测的可靠性不高的问题,保证车辆电子电器的高质量交付。针对这种情况,本论文主要工作内容如下:1)针对下线诊断检测系统这一领域的空白,分析了传统检测方法的不稳定性、单一性以及低可靠性的原因,提出了一种基于控制器局域网络(CAN Controller Area Network)/网络协议诊断(DoIP Diagnostic over Internet Protocol)的下线诊断系统。该系统解决了电子电器检测过程中的效率不高、遗漏故障、电器问题难以识别等问题,最终经过实际生产线运行本系统的高效检测和稳定运行,验证了这套诊断检测系统的准确性、有效性和实用性。2)通过分析该系统需要实现的功能,设计了诊断系统的总体架构,研究开发了相对应的硬件方案,搭建了系统的硬件框架,实现了整个系统的功能。该系统不仅可以应用于传统CAN总线架构的车辆,也可应用于以太网架构的车辆,未来的远程诊断也可基于本系统再进行扩展,因此可扩展性强且适用性高。3)针对传统汽车电子电器功能检查依赖人工检查和经验的问题,研究和设计了下线诊断系统的软件,提出了基于诊断检测程序的测试方法,并设计了存储服务器和可视化数据平台用于诊断数据的存储和展示,解决了传统检测方式效率低下和电子电器数据难以追踪的痛点,最终经过生产线的测试验证了该方法的准确性和实时性。4)在实车上对本系统进行了通讯验证,以及通过CAN和DoIP两种方式的软件下载对比,验证了系统的性能。在生产环境下进行运行验证,通过可视化数据平台导出了检测数据报告,验证了数据查询和搜索的可靠性和稳定性。本文所论述的电子电气诊断系统是针对于整车下线的车辆配置和测试开发的,其研究开发成果具有重大的现实意义,将为日益增长的车载电子电器网络架构提供检测平台,也为未来的远程空中升级(OTA Over The Air)诊断的开发积累经验。更多还原

【Abstract】 With the growth of public awareness,the innovation of emerging science and technology,and the serious consumption of global resource reserves and other factors,the future of automobiles will develop rapidly in the directions of electronics,telematics,automatic driving,and shared travel,the number of ECUs(Electronic Control Units)and the demand for computing power also will show explosive growth with these new technologies.The evolution of vehicle electronic and electrical architecture has not only increased the complexity of the automotive electronic system,but also put forward higher requirements for the communication method of the vehicle bus.In the process of car manufacturing,the final assembly shop is the last process of vehicle build,its operating status directly affects production efficiency,vehicle quality and delivery requirements.The quality of the electronics and electrical appliances of the vehicle is one of the important indicators of the final assembly shop.At present,the end of line(EOL)diagnostic system of domestic OEMs is still in its infancy.For the EOL detection of electronic appliances,it focuses on manual check and supplier quality assurance.This detection method is too dependent on personnel and cannot support production efficiency.The detection requirements of complex electrical appliances have led to effective monitoring of the quality of electrical appliances.According to the requirements of the assembly workshop,this paper designs a set of EOL diagnostic test system for the above problems,which can realize the effective detection and monitoring of electrical and electrical functions,at the same time can meet the diagnostic needs brought by the future electronic and electrical architecture upgrades.The EOL diagnostic system designed in the paper can improve production efficiency,resolve the reliability problems of manual check in the traditional way,and ensure the quality of vehicle electronics.In view of this situation,the main content of this paper is as follows: 1)Aiming at the gaps in the field of EOL diagnostic detection systems,the reasons for the instability,unity and low reliability of traditional detection methods are analyzed,and a CAN(Controller Area Network)/DOIP(Diagnostic Over Internet Protocol)based EOL diagnostic system is raised.The system solves the problems of low efficiency,missing faults,and difficult identification of electrical problems in the electronic and electrical testing process.Finally,the high-efficiency detection and stable operation of this system through the actual production line operation verified the accuracy,effectiveness and practicability of this diagnostic detection system.2)Analyzing the functions that the system needs to realize,the overall structure of the diagnostic system is designed,the corresponding hardware scheme is researched and developed,the corresponding hardware architecture is built,and the function of the whole system is realized.The system can be applied not only to vehicles with traditional CAN bus architecture,but also to vehicles with Ethernet architecture.The future remote diagnosis can also be extended based on this system,so it has strong scalability and high applicability.3)Aiming at the problem of traditional automotive electronic and electrical function inspections relying on manual check or experience,the software of the EOL diagnostic system was researched and designed,and the testing method based on the diagnostic testing program was proposed.A data storage server and a visualization data platform were designed for diagnostic data.The storage and display of this method solves the pain points of the inefficiency of traditional detection methods and the difficulty of tracking electronic and electrical data.Finally,the test on the production line verifies the accuracy and real-time nature of this method.4)The communication verification of this system was carried out on the actual vehicle,and the software downloading comparison through CAN and DoIP two methods was carried out.The performance of the system was verified and it was run in the production environment for a period of time.The test data report was exported through the visual data platform,which verified the reliability and stability of data query and search.The electrical and electronic diagnosis system discussed in this article is developed for the vehicle configuration and testing of the vehicle,its research and development results are of great practical significance.It will provide a testing platform for the growing vehicle electrical and electronic network architecture,and also gather experience for the development of future remote(OTA Over The Air)diagnosis.更多还原