摘要近年来，随着社会经济的快速发展，汽车已然成为人们日常生活中不可或缺的交通工具，但伴随着汽车的增多，发生交通事故的概率也变大了，交通形势日益严峻。据了解，每年发生的交通事故很多都是因为超速行驶引起的。针对这种情况，本文设计了一种汽车超速报警系统，希望可以减少交通事故的发生，保证驾驶员的人身安全。

本文设计的汽车超速报警系统以单片机AT89C51为核心，通过霍尔传感器检测车速，经过单片机处理数据，最后在LED显示屏上显示出汽车的实时速度。本系统还允许驾驶员自己通过键盘来设置最大车速，当发现汽车的瞬时速度超过设定的最大值时，蜂鸣器开始发出报警信号，提醒驾驶员减速。实验表明，该系统操作简单，性能稳定，抗干扰能力强，可广泛应用于生活中。

该论文有图19幅，参考文献20篇。73808

毕业论文关键词：TA89C51单片机  汽车超速  霍尔传感器  超速报警  LED显示

Design of automobile over speed alarm system based on single chip microcomputer

Abstract In recent years, with the rapid development of social economy, the car has already become indispensable traffic tools in people's daily life, but with the increase of the car, the probability of traffic accident to occur is also larger, traffic situation is becoming more and more serious。 It is understood that a lot of traffic accidents happen every year because of speeding。 In view of this situation, this paper designs a kind of auto alarm system, hoping to reduce the occurrence of traffic accidents, to ensure the safety of the driver

In this paper, the design of the car speeding alarm system to MCU AT89C51 as the core, through the Holzer sensor detection speed, through the MCU processing data, and finally in the LED display on the car's real-time speed。 The system also allows the driver to set the maximum speed through the keyboard, when the vehicle's instantaneous speed is found to exceed the maximum set value, the buzzer began to issue a warning signal to remind the driver to slow down。 Experiments show that the system has simple operation, stable performance, strong anti-interference ability, and can be widely used in life。。

Key words: AT89C51 single  cars speeding  hall sensor  speed alarm  LED disply

目  录

摘   要 I

Abstract II

目  录 III

图清单 V

1 绪论 1

1。1 课题研究背景及意义 1

1。2 国内外研究现状 1

1。3 课题的主要研究内容 3

2 汽车超速报警系统的总体设计 4

2。1 设计要求 4

2。2 方案选择 4

2。3 系统总体设计框图 7

3 汽车超速报警系统硬件设计 9

3。1 速度传感器的分类和特点 9

3。2 霍尔传感器 10

3。3 主控模块 11

3。4 电源电路 12

3。5 时钟电路 13

3。6 复位电路 14

3。7 按键电路