文档介绍：本科毕业设计(论文)
题目: 温度控制电路电源监测及延时控制电路设计
院(系): 电子信息工程学院
专业: 电子信息科学与技术
班级: 080406
姓名: 谢贵明
学号: 080406114
导师: 王健
2012年 06月
来源:http://blog./mmeidu
温度控制电路电源监测及延时控制电路设计
摘要
本文介绍了以单片机为核心的电源监测电路和以CPLD为核心的延时控制电路的设计。阐述了电压电流传感器、ADC0809、LCD1602的工作原理及采集电压电流的方法,单片机在监测电路中对外围器件的控制作用及原理,延时控制电路的工作原理以及怎么用硬件描述语言去描述和向CPLD写入配置文件来实现相应的电路功能。
基于单片机的电压电流检测电路使用A/D 转换芯片ADC0809 设计了一个多路电压采集系统,其中A/D 转换结果经过单片机处理后,通过LCD1602显示相应的数值,实现了对四路电源的电压和电流的监测。
基于CPLD的延时控制电路由输入锁存电路,译码电路和固态继电器驱动电路等组成,其中输入锁存电路和译码电路等是用VHDL语言编写的。此电路延时精确,而且还实现了对外部四路电源的上电时序控制功能。
最后,还介绍了相应的软件编写流程和实现方法。全文系统阐述了整个硬件电路和软件的实现方案,并对设计进行了仿真。
关键词:单片机;CPLD; ADC0809;LCD1602;VHDL
The design of Power monitoring and delay control circuit in the temperature control circuit
Abstract
This article describes the design of MCU as the core power supply voltage and current monitoring circuit and the CPLD to control the core of the delay control circuit. Describing the working principle of the voltage and current sensors, AD0809, LCD1602 and the acquisition of voltage and current and the control action and principle of the microcontroller control of peripheral devices in the monitoring circuit, and the working principle of delay control circuit and how to use the
Hardware description language to describe and to write the configuration files to the CPLD circuit to corresponding circuit functions.
The voltage and current detection circuit based on single chip puter uses A / D converter chip ADC0809 design a multi-channel voltage collection system to achieve a four-way power supply voltage and current monitoring, which the A / D conversion results after single-chip processing, and the LCD1602 displays the corresponding values.
The delay control circuit based on CPLD consists of the input latch circuit, decoding circuit and solid-state relay drive circuit and positions, which the input latch circuit and decoding circuit designed by using VHDL language. The circuit not only has a delay precision, but also realize the power of the external fou