粮仓的温湿度监测系统设计

论文编号:JD989 论文字数:13467,页数:41

摘要

随着单片机技术和工业生产自动化程度的不断提高，单片机测控技术已得到了广泛的推广和应用。这种单片机的测试技术为工业控制、家用电器和仪器仪表智能化的应用提供了一种全新的、有效的测试方法，并具有很大的实用意义和前景。

本文根据粮仓环境测试的特点，应用现代检测理论，对温室的温度、湿度等环境因子进行自动检测，完成了整个监测检测系统的软、硬件设计。

第一章对粮仓自动监测系统的发展背景及现状作一简单介绍，并确定了本论文的设计方向;;第二章介绍了系统的硬件设计;第三章介绍了系统软件的模块化设计;后对整个系统的改进提出几点建议。

关键词: 粮仓；现代检测技术；单片机；微处理器

Abstract

With the continuous development of the microprocessor technology and industry automation level,the technology of microprocessor test has been widely spread and applied.This technology was based on modern test theory and provided a kind of fire-new and effective control method in application of industry control, household appliances and instrument intelligence, it has prodigious practical use and prospect.

In this paper, according to the character of environment test in graindepot, we applied modern theory to realize auto-test to temperature and humidity. We accomplished the software and hardware design of the whole test system finally.

In the first chapter, the paper introduced simply the background and development condition of auto-test system in grand put in graindepot forward the research subject. In the second chapter, this paper introduced hardware design of system. In the third chapter,, the paper introduced software design of system. Finally, several pieces of suggestions were put to improve the whole system.

keywords: Graindepot ;Modern test technology; Microprocessor

目录

摘要Ⅰ

AbstractⅡ

目录IV

1绪论1

1.1研究的背景和意义1

1.2粮情检测技术的国内外研究动态1

1.3温度传感器技术的国内外研究动态…………………………...1

1.4湿度传感器技术的国内外研究动态……………………….…...2

1.5本课题的主要研究目标及内容……………………..………….2

2系统的硬件设计....................................3

2.1总体设计…………………………………………………………4

2.2信号采样电路设计………………………………………………5

2.2.1温度采样电路设计…………………………………………….6

2.2.1.1温度传感器的选择…………………………………………..6

2.2.1.2温度检测电路的设计………………………………………..8

2.2.2湿度采样电路设计…………………………………………….9

2.2.2.1湿度传感器的选择…………………………………………10

2.2.2.2湿度检测电路………………………………………………11

2.3单片机小系统的设计………………………………………..12

2.3.1单片机复位电路的设计……………………………………...12

2.3.2单片机时钟电路的设计……………………………………...13

2.3.3 8031单片机系统…..........................14

2.4 A/D转换电路...................................15

2.4.1 A/D转换的常用方法……………………………………….16

2.4.2 A/D转换器的主要技术指标………………………………...17

2.4.3 ADC0809的主要特性和内部结构………………………….18

2.4.4 ADC0809管脚功能及定义………………………………….19

2.4.5 ADC0809与8031的接口电路……………………………..20

2.5键盘/显示器接口电路设计............................21

2.5.1键盘接口设计…………………………………………………….21

2.5.1.1键盘工作原理………………………………………………….22

2.5.1.2 8031经8155与键盘接口方法…………………………………23

2.5.2显示器接口设计…………………………………………………..23

2.5.2.1LED显示器结构与原理………………………………………..23

2.5.2.2 8031经8155与显示器接口方法………………………………24

2.6执行及报警电路设计……………………………………………….25

3系统的软件设计.....................................26

3.1 软件系统框图及地址分配……………………………………..26

3.2主程序设计……………………………………............27

3.3键盘程序设计…………………………………………………...28

3.4 A/D转换程序设计……………………………………………...29

3.5滤波程序设计…………………………………………………...30

总结……………………………………………………………………...33

致谢…………………………………………………………………………34

参考文献............................................35