车联网中基于OBD的车辆信息采集系统的硬件优化设计及EMC测试

发布时间：2018-08-06 21:18

【摘要】：车联网技术的发展使汽车变的更加电子化和智能化,为人们提供了更加智能和舒适的驾车环境,对人们的出行和道路交通安全都具有重要的意义。车联网的实现需要依托有车辆、行人、道路搭建起来的数据信息通信网络,实现网络节点数据的互联互通。本文设计的基于OBD的车辆信息采集系统是车联网中数据信息通信网络的重要组成部分,通过与安卓终端平台及后台服务器配合使用,为构建完整的互联网系统提供了数据支持。首先,论文研究了车联网及车辆信息采集系统的研究现状和发展趋势,根据车辆信息采集系统的基础功能需求和设计的基本原则,提出了系统的整体设计方案。并对系统设计中用到的关键技术进行了研究,包括OBD系统及OBD-II的相关通信标准协议。此外,对电磁兼容(EMC)的理论及车辆信息采集系统硬件模块设计中的电磁兼容性设计进行了深入研究和详细介绍。其次,论文对基于OBD的车辆信息采集系统的硬件模块进行了设计,并对软件中核心功能的实现进行了介绍。硬件模块设计中分为四大部分进行设计,分别为电源部分、主芯片及其最小系统、OBD接口电路、蓝牙通信电路;并进行了PCB的设计,设计中重点考虑了车辆信息采集硬件模块的电磁兼容性(EMC)设计。软件的核心功能介绍包括汽车OBD系统与安卓终端蓝牙通信的功能实现、车辆信息采集功能的实现及数据远程传输功能的实现。最后,论文对设计的车辆信息采集模块进行了实车试验,验证了模块的功能的可实现性及工作的稳定性;在电磁兼容检测中心,对硬件模块进行了EMC测试,测试了模块在复杂电磁环境下对外界的干扰性和模块的抗扰性能。
[Abstract]:With the development of vehicle networking technology, cars become more electronic and intelligent, which provides people with a more intelligent and comfortable driving environment. It is of great significance to people's travel and road traffic safety. The realization of vehicle networking needs to rely on the data communication network built up by vehicles, pedestrians and roads to realize the data interconnection of network nodes. The vehicle information acquisition system based on OBD is an important part of the data information communication network in the vehicle network. It provides data support for the construction of the complete Internet system by cooperating with the Android terminal platform and background server. Firstly, the paper studies the research status and development trend of vehicle networking and vehicle information acquisition system. According to the basic functional requirements and design principles of vehicle information collection system, the overall design scheme of the system is put forward. The key technologies used in the system design are studied, including OBD system and OBD-II communication standard protocol. In addition, the theory of electromagnetic compatibility (EMC) and the design of hardware module of vehicle information acquisition system are studied and introduced in detail. Secondly, the hardware module of vehicle information acquisition system based on OBD is designed, and the implementation of core functions in the software is introduced. The hardware module is divided into four parts: the power supply part, the main chip and its minimum system interface circuit, Bluetooth communication circuit, and the design of PCB. The electromagnetic compatibility (EMC) (EMC) design of vehicle information acquisition hardware module is considered in the design. The core functions of the software include the realization of Bluetooth communication between OBD system and Android terminal, the realization of vehicle information collection and the realization of remote data transmission. Finally, the paper carries on the actual vehicle test to the designed vehicle information collection module, verifies the function realization and the working stability of the module, and carries on the EMC test to the hardware module in the EMC testing center. The interference performance of the module to the outside world and the immunity performance of the module in the complex electromagnetic environment are tested.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U495

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