摘 要
隨著現(xiàn)代社會(huì)的進(jìn)步，許多領(lǐng)域都越來越依賴于電子技術(shù)的發(fā)展。與我們的生活環(huán)境較為密切如溫度、濕度等都可以通過電子設(shè)備進(jìn)行檢測(cè)與控制。在工農(nóng)業(yè)生產(chǎn)方面對(duì)這些數(shù)值的要求也越來越高。因此，準(zhǔn)確測(cè)量溫濕度等都變得至關(guān)重要。本系統(tǒng)的設(shè)計(jì)主要針對(duì)辦公室以及倉庫等對(duì)溫濕度要求不是很嚴(yán)格但又與我們的生活緊密相關(guān)的環(huán)境進(jìn)行的。
針對(duì)上述環(huán)境空間大且不易逐點(diǎn)移動(dòng)測(cè)量的特點(diǎn)，本文提出一種無線的多點(diǎn)溫濕度采集系統(tǒng)作為解決方案。該系統(tǒng)采用由兩個(gè)低功耗、高性能單片機(jī)AT89S52作為系統(tǒng)核心，同時(shí)控制3路DS18B20溫度模塊及1路DHT11溫濕度模塊對(duì)周圍環(huán)境的溫濕度進(jìn)行檢測(cè)，實(shí)時(shí)將采集到的數(shù)據(jù)在LCD1602顯示器上顯示出來，同時(shí)通過兩個(gè)無線數(shù)據(jù)通信收發(fā)芯片NRF24L01組成與上位PC機(jī)通信的智能多通道溫濕度采集系統(tǒng)。下位機(jī)與上位機(jī)之間通過RS232串口模塊進(jìn)行通信，最后在PC機(jī)上完成配置、顯示、畫圖以及實(shí)時(shí)存儲(chǔ)數(shù)據(jù)的功能。該設(shè)計(jì)方案具有測(cè)量精度高，系統(tǒng)功能強(qiáng)大且穩(wěn)定性強(qiáng)等優(yōu)點(diǎn)。
本文介紹了基于NRF24L01的短距離多通道無線溫濕度采集系統(tǒng)，著重分析了系統(tǒng)的整體設(shè)計(jì)，其中主要包括硬件電路設(shè)計(jì)、軟件設(shè)計(jì)以及通信原理。通過采用模塊化設(shè)計(jì)，使得整個(gè)系統(tǒng)的設(shè)計(jì)思路清晰且易于調(diào)整完善，最終較好的實(shí)現(xiàn)了設(shè)計(jì)所要求的功能。

關(guān)鍵詞：多通道數(shù)據(jù)采集，無線收發(fā)，串口通信











Multi-Channel Data Acquisition and Analysis System
(Lower Computer)
Abstract
With the progress of modern society, many areas are increasingly dependent on the development of electronic technology. There are so many parameters which can be detected and controlled by electronic devices and also of great reality with our living environment, such as temperature, humidity and so on. On the other hand, the use of these devices in industrial and agricultural areas is more strictly. Therefore, how to measure these parameters accurately is become more and more important. Our system is primarily designed for offices and warehouses where aren’t very strict with temperature and humidity but is closely related to our daily life.
Aiming at the space of the measurement environment is the large and difficult to move the device here and there, this paper presents a wireless multi-point temperature and humidity acquisition system. The system consists of two power-saved and high-performance microcontrollers AT89S52 as the core of the system, contain three channel DS18B20 as temperature control module and one channel DHT11 as humidity module, which achieve to detect the temperature and humidity of surrounding environment. Then real-time data will be collected and sent to the LCD1602 for show. At the same time data will be transmitted to the computer by two wireless transceiver chips. While receive data, it complete the configuration, display, drawing, and real-time storage.
This paper introduces us a short-range multi-channel wireless temperature and humidity acquisition system based on the NRF24L01 wireless transceiver. Throughout this article, we mainly analyzes the overall system design, which includes hardware design, software design and communication principles. By adopting modular design, making the whole system design clear and easy to adjust and improve, and ultimately is helpful for achieving the required functions of the design quite perfect.

Keywords: Multi-channel Data Acquisition, Wireless Transceiver, Serial Communication
目 錄
摘要 I
Abstract II
第1章 緒論 1
1.1數(shù)據(jù)采集概述 1
1.2 數(shù)據(jù)采集的現(xiàn)狀和應(yīng)用情況 1
1.3 課題指導(dǎo)思想 2
1.4 課題設(shè)計(jì)任務(wù)和要求 2
1.4.1課題的設(shè)計(jì)任務(wù) 2
1.4.2課題的技術(shù)要求 3
1.5 論文結(jié)構(gòu) 3
第2章 系統(tǒng)總體設(shè)計(jì) 4
2.1系統(tǒng)的工作原理 4
2.2 系統(tǒng)的總體設(shè)計(jì)方案 5
2.2.1 系統(tǒng)設(shè)計(jì)原則 5
2.2.2系統(tǒng)的設(shè)計(jì)方案 6
2.3 系統(tǒng)硬件電路的器件選擇 7
2.3.1系統(tǒng)處理器 7
2.3.2溫濕度模塊 7
2.3.3顯示模塊 7
2.3.4無線通信模塊 8
2.3.5電平轉(zhuǎn)換芯片 8
2.4 本章小節(jié) 8
第3章 系統(tǒng)硬件電路設(shè)計(jì) 9
3.1系統(tǒng)硬件電路設(shè)計(jì)原則 9
3.2 系統(tǒng)各部分的硬件電路設(shè)計(jì) 9
3.3 AT89S52單片機(jī) 10
3.3.1 AT89S52引腳配置 10
3.3.2 AT89S5硬件電路圖 10
3.4 溫濕度模塊 11
3.4.1 DS18B20溫度傳感器 11
3.4.2 DHT11溫濕度傳感器 13
3.5 LCD液晶顯示模塊 14
3.5.1 LCD1602接口引腳 14
3.5.2 LCD電路原理圖 15
3.6 溫控模塊 15
3.7 無線收發(fā)模塊 16
3.7.1 NRF24L01概述 16
3.7.2 引腳功能及描述 16
3.7.3 NRF24L01應(yīng)用原理圖 17
3.8 電源電路模塊 17
3.9 串口通信模塊 19
3.10 本章小結(jié) 20
第4章 系統(tǒng)軟件設(shè)計(jì)與配置 21
4.1 系統(tǒng)軟件設(shè)計(jì)要解決的問題 21
4.2 系統(tǒng)軟件模塊化設(shè)計(jì) 21
4.2.1 溫濕度模塊 21
4.2.2 LCD液晶顯示模塊 22
4.2.3無線收發(fā)模塊 25
4.2.4串口通信模塊 26
4.3 本章小結(jié) 26
第5章 系統(tǒng)調(diào)試與改進(jìn) 27
5.1 LCD液晶顯示模塊調(diào)試 27
5.2 溫濕度模塊調(diào)試 28
5.3 無線收發(fā)模塊調(diào)試 31
5.4串口通信模塊調(diào)試 32
5.5系統(tǒng)改進(jìn)方案 33
5.5.1 擴(kuò)大傳輸距離的擴(kuò)展設(shè)計(jì) 33
5.5.2 溫控模塊和顯示模塊的改進(jìn) 33
5.5.3 采用PCB制板 33
5.6 本章小結(jié) 34
結(jié)論 35
謝辭 36
參考文獻(xiàn) 37
附錄 軟件程序 38