通用短距離無(wú)線采集卡畢業(yè)設(shè)計(jì)


目    錄

中文摘要 I
英文摘要 II
1  緒論 1
1.1  課題背景 1
1.2  數(shù)據(jù)采集系統(tǒng)簡(jiǎn)單介紹 1
1.3  無(wú)線采集卡系統(tǒng)框圖 3
2  數(shù)據(jù)采集部分 5
2.1  信號(hào)調(diào)理模塊的設(shè)計(jì) 5
2.1.1  常見傳感器簡(jiǎn)介 5
2.1.2  差分輸入和電流信號(hào)輸入 5
2.1.3  電壓信號(hào)輸入 7
2.1.4  頻率信號(hào)輸入 8
2.1.5  數(shù)字信號(hào)的輸入 10
2.2  AD7714的硬件電路設(shè)計(jì) 15
2.2.1  AD7714與MCU的接口 16
2.2.2  對(duì)AD7714 的讀寫要點(diǎn)和注意事項(xiàng) 17
2.2.3  AD7714與基準(zhǔn)電壓源AD780連接 18
3  數(shù)據(jù)處理和發(fā)送、接收硬件設(shè)計(jì) 19
3.1  單片機(jī)部分 19
3.1.1  STC89C52 的特點(diǎn)及工作原理 19
3.1.2. STC89C52管腳說(shuō)明 20
3.2  無(wú)線芯片的選擇 22
3.2.1  NRF24L01無(wú)線數(shù)據(jù)傳輸部分 22
3.2.2  NRF24L01簡(jiǎn)介 24
3.2.3  NRF24L01工作模式 26
3.2.4  NRF24L01配置過(guò)程 29
4  串口通信模塊設(shè)計(jì) 30
4.1  通信簡(jiǎn)介 30
4.2  單片機(jī)串口通信接口 31
4.2.1  單片機(jī)串口結(jié)構(gòu) 31
4.2.2  單片機(jī)與PC 機(jī)之間電平轉(zhuǎn)換硬件接口 33
4.2.3  單片機(jī)串口通信設(shè)置及初始化 35
5  系統(tǒng)電源電路設(shè)計(jì) 39
5.1  計(jì)算參數(shù)值 39
5.1.1  變壓器的計(jì)算 39
5.1.2  整流橋的選擇 39
5.1.3  濾波電容的計(jì)算 39
5.2  穩(wěn)壓電路原理圖 40
6  系統(tǒng)軟件設(shè)計(jì) 41
6.1  主程序設(shè)計(jì) 41
6.2  AD7714和單片機(jī)的接口程序設(shè)計(jì) 42
6.3  無(wú)線芯片和單片機(jī)接口程序設(shè)計(jì) 42
6.4  單片機(jī)和PC機(jī)接口的程序設(shè)計(jì) 43
7  總結(jié) 46
致謝 47
參考文獻(xiàn) 48
附錄 49
 
通用短距離無(wú)線采集卡設(shè)計(jì)

摘    要

本文介紹了基于單片機(jī)的無(wú)線數(shù)據(jù)采集的硬件設(shè)計(jì)和軟件設(shè)計(jì)，該系統(tǒng)能夠應(yīng)用于人們的生活，實(shí)現(xiàn)工業(yè)生產(chǎn)現(xiàn)場(chǎng)的短距離數(shù)據(jù)采集和控制。數(shù)據(jù)采集系統(tǒng)硬件部分主要是將常見的傳感器信號(hào)轉(zhuǎn)換成標(biāo)準(zhǔn)的數(shù)字信號(hào),從而使單片機(jī)可以進(jìn)行處理并通過(guò)無(wú)線芯片發(fā)射和接收。數(shù)據(jù)采集與通信控制采用了信號(hào)調(diào)理模塊和單片機(jī)STC8C52實(shí)現(xiàn)，主要是以單片機(jī)為核心，以及其他的功能模塊:傳感器信號(hào)調(diào)理模塊、A/D模數(shù)轉(zhuǎn)換模塊、無(wú)線芯片發(fā)收模塊和串行接口模塊。多路傳感器信號(hào)經(jīng)過(guò)模數(shù)轉(zhuǎn)換器AD7714進(jìn)行模數(shù)轉(zhuǎn)換，單片機(jī)處理采集的數(shù)據(jù)，然后通過(guò)發(fā)射端NRF24L01發(fā)射出去，接收端的NRF24L01接收后，經(jīng)單片機(jī)由MAX232上傳至上位機(jī)。
軟件部分主要包括AD7714和單片機(jī)的接口程序設(shè)計(jì)、單片機(jī)和無(wú)線芯片的接口程序設(shè)計(jì)、單片機(jī)和上位機(jī)的接口程序設(shè)計(jì)。

關(guān)鍵詞  數(shù)據(jù)采集  STC89C52  AD7714  無(wú)線芯片

 
The Design Of General Short-range Wireless Data
Acquisition Card

Abstract

This paper introduces the wireless data acquisition based on single-chip microcomputer of the hardware design and software design, This system can be applied in people's life, the industrial production site data acquisition and control in short distance. This paper is focused on the data acquisition system, the hardware part focuses on how to converts common sensor signals to standard digital signal which could processed by SCM ,then the data is transmitted and receipted by wireless chips. Data collection and communication control system adopt the Signal Conditioning module and realized by STC89C52.The hardware is consisted of some modules which are sensor Signal Conditioning module, wireless chip module and serial interface module. Multi-channel sensor signals is processed by AD7714, which convert the collected analog data to digital data. SCM in charge of data processing, and transmit the data through wireless chips NRF24L01, after another NRF24L01 accepted and processed by SCM, the processed data is delivered by MAX232 interface to computer.
 The software design mainly consists of AD7714 and SCM interface program design, SCM and wireless chip interface program design, SCM and PC interface program design.

KEY WORDS  Data Acquisition  STC89C52  AD7714  Wireless-Chip