電子信息工程論文

目  錄

緒  論 1
1 系統(tǒng)總體方案設計 3
1.1 方案的設定與論證 3
1.1.1 方案一 3
1.1.2 方案二 3
1.2 方案的確定 4
2 系統(tǒng)硬件電路設計 5
2.1 檢測電路的設計 5
2.1.1 溫度檢測電路 5
2.1.2 濕度檢測電路 6
2.1.3 煙霧檢測電路 7
2.2 信號處理電路的設計 7
2.2.1 程控放大電路 7
2.2.2 跟隨器 8
2.2.3 數(shù)字濾波器 8
2.2.4 多路開關 8
2.3 存儲器的擴展 9
2.3.1 控制信號及片選信號 9
2.3.2 各芯片地址空間分配 9
2.4 I/O端口的擴展 10
2.4.1 8255A與單片機的連接 11
2.4.2 8255A地址口的確定 11
2.4.3 A/D轉換電路 11
2.5 硬件外設電路設計 13
2.5.1 鍵盤/顯示器接口電路 13
2.5.2 繼電器與單片機的連接電路 14
2.5.3 蜂鳴音報警電路 15
3 系統(tǒng)所使用芯片簡介 16
3.1 AD590 溫度傳感器 16
3.2 HS1101濕度傳感器 17
3.3 TGS202氣敏傳感器 17
3.4 A/D轉換器ICL7109 18
3.4.1 ICL7109特性 18
4 系統(tǒng)軟件設計 19
4.1 軟件設計原理及介紹 19
4.1.1 總系統(tǒng)體系設計 19
4.1.2 I/O端口的擴展程序 21
4.1.3 程控放大 21
4.1.4 中值濾波 22
4.1.5 顯示子程序 23
4.1.6 定時程序 24
5 系統(tǒng)功能簡介 25
6 硬件設計結果 26
7 系統(tǒng)仿真及調試 28
7.1 系統(tǒng)功能模塊仿真 28
7.1.1 溫度仿真 28
7.1.2 系統(tǒng)火災報警仿真 28
7.2 系統(tǒng)仿真結果顯示 29
結  論 30
參考文獻…………………………………………………………………………..…………31
附  錄 32
致  謝 37

 
倉庫溫、濕度檢測及火災報警系統(tǒng)的設計

摘  要

  本文設計了一種基單片機控制技術的倉庫溫、濕度檢測及火災報警系統(tǒng)。系統(tǒng)分別由AD590溫度傳感器、HS1101濕度傳感器、TGS202氣敏傳感器來獲取和控制溫度、濕度和氣體濃度的信號，并利用A/D轉換器將其轉換為數(shù)字信號。當倉庫溫度和濕度高于正常溫濕度時能及時的進行自動調控，并且恢復正常溫濕度，若倉庫里的氣體含量產生異常時，啟動報警裝置。用戶可以通過鍵盤設置需要的參數(shù)及報警的上下限值，并通過數(shù)碼管顯示。系統(tǒng)為單片機測試系統(tǒng)，含溫、濕度和氣敏傳感器電路、量程放大電路、信號濾波電路、A/D轉換電路等電子電路、繼電器、單片機等硬件電子電路。本系統(tǒng)具有自動巡檢測控、自動顯示、信號自動處理和 信息自動傳輸?shù)然竟δ?。系統(tǒng)主要通過軟件編程設計，實現(xiàn)溫、濕度測試及火災報警。該系統(tǒng)可實時測試、控制，且穩(wěn)定性好、操作簡單，可廣泛用于農業(yè)、林業(yè)等部門的相關控制部分。
【關鍵詞】 單片機   溫度  濕度  傳感器  火災報警

The Warehouse Temperature，Humidity Test
And Ffire Alarm System's Design

Abstract

The article design introduces a kind of warehouse temperature and humidity test and the fire alarming system based on the single chip microcomputer control technology.The system gains the signal of by the temperature, the humidity, and the gas content AD590 temperature sensor, the HS1101 humidity sensor, the TGS202 gas sensor gains and the control temperature, the humidity and the gas strength signal separately, and then uses A/D to transfer them into the digital signals.When the warehouse temperature and the humidity are higher than the normal humiture can prompt carry on the automatic regulation, and restores the normal humiture, if in the warehouse gas content produces exceptionally time, start alarm device.The users can set the necessary parameters via the keyboard and the upper and lower alarm limits, and through the digital display.This test system is microprocessor systems, including temperature, humidity and gas sensor circuit, range amplifier; signal filtering circuit, A/D conversion circuits and other electronic circuits, relays, microcontroller hardware such as electronic circuits. This system has inspects automatically the observation, the automatic demonstration, the signal automatic reduction and the information automatic transmission and so on basic function. The system mainly through the software programming design, realizes warm, the humidity test and the fire warning.This system may the real-time test, the control, and the stability is good, simplicity of operator, it widely uses in department's and so on agriculture, forestry correlation control parts.
【Keywords】Single chip microcomputer   Temperature   Humidity     Sensor     Fire alarming