摘要：随着人们生活水平的不断提高，汽车已成为现代社会中的主要代步工具，它深刻改造了人们的生活，同时也带来了很多问题，其中汽车安全是最不容忽视的。为实现家用小轿车的安全驾驶，本文针对轿车的安全行驶车距和油箱安全设计了一种关于轿车的安全预警系统。该系统主要由油温及油压采集、转速采集、超声波发射接收、信号处理及报警电路五部分组成。本设计利用温度传感器、压力传感器、霍尔传感器、超声波模块进行信号采集，利用单片机STC89C52进行处理。如果测量结果超出阈值时，单片机控制LED指示灯或蜂鸣器报警。调试结果表明，本设计运行稳定，测量准确度高，实时性好，操作简单，成本低，达到了预期目标。18955
毕业论文关键词：轿车安全；防撞；油箱安全；单片机
Design of Safety Early Warning System on Household Car
Abstract: With the continuous improvement of people's living standard, cars have become the main transportation in the modern society, and they profoundly transform people's lives. At the same time, they also bring many problems. Among them, the car safety isn’t most allowed to be ignored. In order to achieve the safe driving home car, in this paper, aiming at the safety of the car driving and fuel tank, a kind of warning system about the safety of cars was designed. The system is mainly composed of five parts: oil temperature and oil pressure sampling, rotational speed, ultrasonic launch reception, signal processing and alarm circuit. In this design, temperature sensors, pressure sensors, hall sensors and ultrasonic module were used for signal collecting, and microcontroller STC89C52 was used for processing. If the measurement results are beyond the threshold, SCM controls LED lamp or buzzer to run for alarming. The debugging results show that this design has reached the expected goals of running stability, high accuracy, good real-time performance, simple operation and low cost.
Key words: Car Security; Collision Avoidance; Safety of Fuel Tank; Single Chip Microcomputer
目 录
摘要 1
引言 2
1. 系统方案设计 2
1.1 系统方案选择 2
1.2 关键器件的选择 3
1.3 系统总体框图及其功能 5
2. 系统硬件设计 6
2.1 最小系统电路 6
2.2 油温检测电路 8
2.3 油压检测电路 9
2.4 油位检测系统 10
2.5 车速检测系统 11
2.6 车距测量系统 12
2.7 异常报警电路 12
2.8 液晶显示电路 13
2.9 程序下载及供电电路 14
3. 系统软件设计 16
3.1 主程序流程图 16
3.2 子程序流程图 16
3.3 超声波测距补偿 18
4. 下载与调试 19
4.1 软件下载 19
4.2 仿真结果 20
5. 总结 21
参考文献 22
附录 23
致谢 24
家用小轿车安全预警系统设计引言
随着社会经济的快速发展和交通运输业务日益兴旺，家用轿车的数量也与日俱增。随之，交通拥挤状况也越来越严重，撞车及由此引发的汽车爆炸事故屡次发生，造成了不可估量的人身伤亡和财产损失。我国的交通事故发生及死亡率都远远高于发达国家。在这样的背景下，为减少交通事故的发生，避免这些事故引起的损失，家用小轿车安全预警系统的研究设计势在必行。 STC89C52单片机家用小轿车安全预警系统设计+电路图:http://www.youerw.com/zidonghua/lunwen_40276.html