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新型轮胎压力监测系统副机电路设计
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摘要
轮胎压力监测系统TPMS(Tire Pressure Monitoring System)主要用于车辆在行驶时对轮胎压力、温度进行实时监测,对轮胎过压、欠压以及漏气等异常情况进行报警,提醒驾车者采取相应的措施,以免造成爆胎事故。是驾车者、乘车人的生命安全预警保障系统。
     本课题所在项目采用了一种创新的系统解决方案,对轮胎轮毂结构进行了改造,将产品副机的安装位置由原来安装在轮毂上改在轮毂轴心上,内部增加惯性发电装置,主机与副机之间的信息通过微型无线网桥传递,无线网桥通过自行研制的DCPL总线与主机相连。本课题方案有效的解决了系统电源以及功耗问题,提高了系统运行的可靠性与稳定性。由于安装方式的改变,使得系统的维护也变得简单起来。
     本文的主要工作是在理解整个系统的前提下负责副机模块的电路设计。论文首先介绍了目前国外TPMS的解决方案,并分析其存在的不足之处,进而提出自己的解决方案。在详细设计部分,本论文分为硬件设计和软件设计两大部分。论文最后描述了该系统的软硬件调试、测试方法及相关结果。
TPMS is abbreviation of Tire Pressure Monitoring System. It is used in the facet of real-time auto-detection of tire air-pressure and air-temperature when driving. It can give the alarm in order to avoid the traffic accident when the air leaking from the tire, low-air-pressure or high-air-pressure and so on. It is a system of safeguard for drivers and passengers.
     This project adopts a new scheme which different from the foreign scheme. We make a small change on the structure of wheel and move the Remote Tire Pressure Monitoring to the axes of wheel. In addition, we add an inertia generator in the TPMS. The host computer communicates with the subsystem by the wireless micro-network-bridge. The wireless micro-network-bridge is connected with the host computer by the DCPL-bus designed by ourselves. This scheme can resolve the problem of power supply effectively and increase the stability and reliability of system. It becomes easier to maintain it as a result of change of installation location.
     In the project, I mainly take charge the circuit design of the subsystem. The paper introduces the scheme of foreign TPMS firstly and analyses the shortcoming, then shows the scheme of author. In the part of detail design, it includes two parts: hardware design and software design. In the end, the paper depicts the debugging of software and hardware and methods of test and related results.
引文
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