汽车轮胎压力监测系统

文档编号:JD1143  文档字数:14261,页数:38

摘要
 大量数据表明，对轮胎正确充气会大大降低爆胎的可能性。为了解决这个问题，轮胎压力监测系统(TPMS)的研究开始受到重视。直接TPMS 是在每个轮胎内使用压力传感器，并安装无线发射器，将压力信息从轮胎内部发送到中央接收器模块上的系统。使用直接系统，可以随时测定每个轮胎内部的实际压力，很容易确定故障轮胎。
 目前直接轮胎压力监测系统包括4个或5个(取决于备胎是否装备传感器)轮胎模块和一个中央接收器模块。轮胎模块由压力传感器、温度传感器、控制模块(如ASIC或MCU)、发射器、天线以及电池组成。也可以包括更多的外部系统，如启动发射的低频(LF)探测器、惯性开关或无内置电池的电源等装置。
 
 一个简单的接收器模块由一根中央天线、一个接收器IC和一个与车辆其他部分相连接的接口组成。通用接口包括控制器局域网络(CAN)接口，该接口通常装备在车辆的车身控制器内。数据由车身控制器处理，当轮胎压力低时，它可以用来向司机提出警告。
 TPMS （轮胎压力监测系统）的作用是在汽车行驶过程中对轮胎气压进行实时自动监测，并对轮胎漏气和低气压进行报警，以确保行车安全。
 本文主要对模拟信号放大，A/D转换，以及单片机控制显示气压作详细介绍说明。
 
关键字  TPMS      AT89C51     ADC0809      PTR2000
 
Abstract：The mass datas indicated that, can greatly reduce the blowout to the tire correct gasification the possibility. In order to solve this problem, tire pressure monitor system (TPMS) the research starts to receive takes. Direct TPMS is in each tire the working pressure sensor, and the installment wireless launcher, transmits the pressure information from the tire interior to the central receiver module in the system. Uses the direct system, may determine each tire interior as necessary the actual pressure, very easy definite breakdown tire.
    At present the direct tire pressure monitor system (is decided including 4 or 5 by spare tire whether equips sensor) the tire module and a central receiver module. The tire module by the pressure transmitter, the temperature sensor, the control module (for example ASIC or MCU), the launcher, the antenna as well as the battery is composed. Also may include more external systems in, like the start launch low frequency (LF) the detector, the inertia switch or do not have sets at battery installment and so on power source。
 A simple receiver module by a central antenna, receiver IC and the connection which connect with the vehicles other parts is composed. General connection including control territory network (CAN) connection, this connection usual equipment in vehicles automobile body controller. Data by automobile body controller processing, when the tire pressure is low, it may use for to the driver to give the warning.
    TPMS (tire pressure monitor system) the function is carries on the real-time automatic monitor in the automobile travel process to the tire pressure, and carries on to tire flat with the low atmospheric pressure reports to the police, guarantees the traffic safety.
 This article mainly enlarges to the simulated signal, A/D transforms, as well as the monolithic integrated circuit control demonstration barometric pressure gives detailed introduction showing.
Keyword:  TPMS    AT89C51    ADC0809     PTR2000
 
目录
第一章  现状分析 5
第二章 经典TPMS系统设计 6
2.1 轮胎监测模块 6
2.1.1 NPX-C10746简介 6
2.1.2 监测模块硬件构成 7
2.2 主机接收显示模块 7
2.3 软件设计 8
2.3.1轮胎监测模块程序设计 8
2.3.2主机显示模块程序设计 9
2. 4通讯及协议 10
第三章 系统硬件设计 11
3.1  AT89C51芯片介绍 11
3.1.1 89C51引脚功能说明： 12
3.2   典型A/D转换芯片ADC0809 13
3.2.1  ADC0809的内部逻辑结构： 14
3.2.2 信号引脚 15
3.2.3 A/D转换接口方式 16
3.3  硬件设计电路图 17
第四章    系统软件设计 19
第五章  辅助电路及器件介绍 20
5.1 PTR2000无线收发数传模块介绍 20
5.1.1产品特性： 20
5.1.2 PTR2000的主要特征如下： 20
5.1.3 应用领域： 21
5.1.4电气特性： 21
5.1.5引脚说明（顶视图）： 22
5.1.6模块工作模式控制及工作频道选择表： 22
5.1.7软件编程： 23
5.2  仪表放大器AD620 23
附录一：      外文翻译原文 27
附录二：系统程序设计源代码 37
参考文献 41

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