高精密多路计时器

电子机电论文编号:JD736  论文字数:7785,页数:19

目    录
摘  要 3
关键词 3
Abstract 4
Key words 4
1 引言 5
2 设计方案 5
3 硬件电路 5
3.1 系统流程图 5
3.2 电源电路 6
3.3 操作控制电路 6
3.3.1器件功能与介绍 6
3.3.2 PT2262编码发射电路 8
3.3.3 PT2272译码接收电路 9
3.4 单片机系统电路 10
3.4.1 89C51单片机引脚功能 10
3.4.2 复位电路 12
3.5 CD4511驱动译码 13
3.6 74LS138译码位选 15
3.7 显示部分 16
4 软件流程图 17
5 理论分析 18
参考文献 19
致谢 19

摘  要
近年来，工业生产发展迅速，很多工业生产需要精确计时来控制生产。为了节约能源和方便工业生产控制管理，迫切需要一种装置，即高精密多路计时器。高精密多路计时器各个功能模块依次为：电源电路、按键控制电路（PT2262编码发射电路和PT2272译码接收电路）、AT89C51单片机复位电路、AT89C51单片机系统控制电路、CD4511译码驱动电路、74LS138位选电路（7407或MC1413驱动数码管显示）。
本文将详细介绍AT89C51单片机实现高精密多路计时器的设计。

关键词： 计时器   AT89C51单片机    高精密    工业生产    动态扫描显示

Abstract
In recent years, industrial production is fast growing, much industrial production needs accurate timing to control production. In order to save the energy and facilitate the control and management of industrial production , need a kind of device urgently, i.e. the high-accuracy time-recorder of many ways. High-accuracy time-recorder each function module of many ways is successively: Circuit of the power , control circuit of the button (PT2262 code launches the circuit and PT2272 decipher and receives the circuit), AT89C51 one-chip computer is restored to the throne in the circuit, AT89C51 one-chip computer systematic control circuit , CD4511 decipher urge circuit, Select the circuit in 74LS138 location. (7407 or MC1413 urge the number to be in charge of revealing ).
This text introduce AT89C51 one-chip computer realize high-accuracy many way design of time-recorder in detail.

Key words：Time-recorder    AT89C51 one-chip computer    High-accuracy    Industrial production    dynamically Scan and display