基于51单片机超声波测距仪的设计说明.doc资源-CSDN文库

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目录

插图清单 I

表格清单 II

摘要 III

AbstractIV

第 1 章绪论- 1 -

1.1 设计的重要意义与超声波的简单概括- 1 -

1.2 相关电路设计的总体介绍- 1 -

1.3 系统电路在汽车防撞报警上的应用- 1 -

第 2 章测距系统的超声波原理与方法- 2 -

2.1 超声波测距的原理- 2 -

2.2 超声波测距的方法- 2 -

2.3 超声波传感器- 3 -

第 3 章超声波测距系统硬件电路的设计- 4 -

3.1 发射电路的设计- 4 -

3.2 接收电路的设计- 5 -

3.3 显示电路的设计- 5 -

3.4 报警蜂鸣器的设计- 6 -

3.5 复位电路设计- 7 -

3.6 晶振电路的设计- 8 -

第 4 章系统软件程序的设计- 9 -

4.1 主程序设计- 9 -

4.2 报警子程序的设计- 10 -

4.3 显示器子程序的设计- 10 -

4.4 按键子程序的设计- 10 -

第 5 章结论- 12 -

参考文献- 13 -

致- 14 -

附录- 15 -

附录一系统焊接图- 15 -

附录二系统实物图- 16 -

附录三系统主程序- 17 -

. . .

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Design of ultrasonic range finder based on 51 SCM

Abstract

The frequency of ultrasound exceeds the human auditory range above 20khz,

which have the advantages of highly directive, energy consumption is

slow ,long distance transmission and follow the propagation tendency of

general mechanical wave in the elasticmedium, so that the application of

ultrasonic range finder become more and more widely. For example, ultrasonic

frequency are applied to anti-collision alarm and reversing radar.This paper

mainly introduces the development of the circuit around the 51 singlechip,

and designs the relevant range finder with the principle of ultrasonic. This

design first clear principle and method of ultrasonic ranging, and then use

the SCM related hardware and software circuit design, the hardware part is

composed of a power supply circuit, MCU interface circuit and ultrasonic

transmitting circuit, receiving circuit and digital display circuit, alarm

buzzer circuit, reset circuit and oscillator circuit; the software part is

the guarantee the operation of the system, the most important part of the

system main program, alarm and display subroutine, ultrasonic transmitting

and receiving the interrupt program. The circuit of the system in the premise

of reasonable design, pay attention to the performance, finally do the test

quickly and accurately, in the life of the application is very extensive,

this design is mainly used in automotive radar and anti-collision alarm, in

reducing the effect of traffic accidents significantly; at the same time,

with the development of science and technology of anti-collision alarm

technology will be used in the future intelligent vehicle to flex its muscles

in their own car, important applications such as shortening the safe driving

distance between vehicles, unmanned autonomous safe overtaking, high speed

and so on.

Key words: ultrasonic; SCM; ranging; alarm device

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