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摘要汽车作为人们最为广泛的出行工具，其轮胎的安全系数越来越为人们所重视，这是因为轮胎的好坏将直接影响到驾驶者的安全性和舒适度。本文设计了一种基于无线通信的轮胎压强检测方案。该系统由主机和从机构成，主机主要实现对采集的数据进行处理，将数据传送给上位机进行显示。系统的下位机包括传感器数据检测部分和数据处理单元。数据采集主要采用MPXH6400压力传感器，采用无线进行通信，借助续航时间长的锂电池进行对从机部分进行电能供应。数据处理单元依据CPU内部自带的数模转换功能，将采集到的模拟胎压电压参数转化为可传输处理的数字量，并将此数据量通过无线单元发送给主机单元。软件借助开发环境，串口助手进行调试，完成轮胎压强的测量，nRF905无线通信等程序编写。通过工作在2.4Ghz频段的nRF905无线射频模块进行数据传递，避免了现场应用布线困难的问题。39766
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毕业论文关键词： 压力传感器 无线通信 LabVIEW
Abstract Car as people travel tools most widely used safety factor of its tires more and more people pay attention, this is good or bad because the tires will directly affect the driver's safety and comfort. This paper presents a tire pressure sensor solutions based on wireless communication. The system consists of a host and as from institutions, host the main achievement of the collected data is processed, the data transmitted to the host computer for display. Lower computer system includes a sensor data detection portion and a data processing unit. Data collection mainly MPXH6400 pressure sensors, wireless communication, with a long life time of lithium battery for power supply from machine parts. The data processing unit according to the CPU's own internal digital to analog conversion, the collected tire voltage analog parameters can be transferred into digital data processing, and this amount of data sent to the host unit through the wireless unit. With the software development environment serial debugging assistant, complete tire pressure measurement, nRF905 wireless communication programming. By working in the 2.4Ghz band nRF905 RF module for data transmission, to avoid the on-site application wiring difficult.
Key word： tire pressure sensors serial communication LabVIEW
目录
摘 要 I
Abstract II
1 概述 1
1.1 课题研究背景及意义 1
1.2 压力传感器技术的现状 1
1.3 无线通信技术的现状与发展 2
1.4 论文组织结构 2
2 系统硬件设计 3
2.1 系统硬件电路设计框图 3
2.2 最小系统电路 4
2.3 无线通信模块 6
2.4 传感器模块 7
2.5 GSM模块 8
2.6 报警模块 10
2.7 电源电路设计 11
2.8 液晶电路 12
2.9 串口通信 13
2.10 本章小结 15
3 测量系统软件序设计 16
3.1 系统程序框图 16
3.2 系统初始化程序 16
3.3 LCD12864液晶显示程序 17
3.4 nRF905无线模块驱动程序分析 19
3.5 GSM短信发送程序 20
3.6 SYN6288语音程序 22
3.7 压强采集程序 22
3.8 AD中断程序 23
3.9 LabVIEW交互界面程序设计 24