數(shù)據(jù)采集與傳輸系統(tǒng)設(shè)計(jì)

測控論文編號:CK085   論文字?jǐn)?shù):11683,頁數(shù):33

目 錄
摘要 II
緒論 1
1.1  選題背景及研究意義 ……..1
1.2  國內(nèi)外研究現(xiàn)狀 2
1.3  本論文的主要研究內(nèi)容 3
2  數(shù)據(jù)采集與傳輸系統(tǒng)設(shè)計(jì)方案  4            
3  數(shù)據(jù)采集與傳輸系統(tǒng)硬件設(shè)計(jì) 5
 3.1  8路模擬信號的產(chǎn)生與A/D轉(zhuǎn)換器電路設(shè)計(jì) 5
 3.2  單片機(jī)和鍵盤顯示器的接口電路設(shè)計(jì) 7
  3.2.1 發(fā)送端的采集與通信控制器 7
  3.2.2 接收端采集結(jié)果顯示 7
 3.3  二進(jìn)制數(shù)字調(diào)制器電路設(shè)計(jì) 8
 3.4  解調(diào)器電路設(shè)計(jì) 10
  3.4.1 方案一：采用74HC4046構(gòu)成的FSK解調(diào)電路 10
        3.4.2 方案二：采用XR2211構(gòu)成的FSK解調(diào)電路 12
 3.5  3dB帶寬為30~50kHZ的帶通濾波器電路設(shè)計(jì) 14
  3.5.1  階數(shù)計(jì)算 14
  3.5.2 電路選擇 14
  3.5.3 容阻元件值的計(jì)算 15
 3.6 時(shí)鐘頻率可變的測試碼發(fā)生器電路設(shè)計(jì) 15
 3.7 偽隨機(jī)碼發(fā)生器和加法電路的設(shè)計(jì) 16
 3.8 主要芯片介紹 18
  3.8.1  ADC0809芯片 18
  4.2.2  AT89S52芯片 20
4  數(shù)據(jù)采集與傳輸系統(tǒng)軟件設(shè)計(jì) 23
 4.1  系統(tǒng)軟件功能 23
 4.2  通信用幀結(jié)構(gòu)與協(xié)議 23
 4.3 系統(tǒng)軟件流程圖 24
5  總結(jié) 26
致謝 27
參考文獻(xiàn) 28
附錄1 電路原理圖 29

摘  要
 數(shù)據(jù)采集與傳輸是現(xiàn)代工業(yè)控制中一個(gè)重要的環(huán)節(jié)，通常將傳感器輸出的模擬信號經(jīng)過儀器放大器后送入到AD轉(zhuǎn)換器，然后由計(jì)算機(jī)進(jìn)行數(shù)據(jù)采集，并經(jīng)一定的通信通道將數(shù)據(jù)調(diào)制后發(fā)送，接收端收到信號后進(jìn)行解調(diào)，然后將采集數(shù)據(jù)結(jié)果進(jìn)行顯示。
 該數(shù)據(jù)采集與傳輸系統(tǒng)以AT89S52及ADC0809為核心，由數(shù)據(jù)采集模塊、調(diào)制解調(diào)模塊、模擬信道、測試碼發(fā)生器、噪聲模擬器、結(jié)果顯示模塊等構(gòu)成。分析了整個(gè)系統(tǒng)的結(jié)構(gòu)，并討論了數(shù)據(jù)采集與單向傳輸系統(tǒng)各組成模塊的設(shè)計(jì)方法等。本設(shè)計(jì)在傳統(tǒng)數(shù)據(jù)采集的基礎(chǔ)上改進(jìn)，采用FSK調(diào)制方式，實(shí)現(xiàn)8路模擬信號的采集與單向傳輸, 通過鍵盤操作實(shí)現(xiàn)數(shù)據(jù)通道和精確的波特率分檔,可以根據(jù)需求對系統(tǒng)進(jìn)行擴(kuò)展廣泛應(yīng)用于多種數(shù)據(jù)采集領(lǐng)域。
關(guān)鍵詞：ADC0809，AT89S52，F(xiàn)SK，測試碼發(fā)生器

Abstract
 Data collection and transmission is one of the important modern industrial control, usually sensor output analog signals will be sent to pass after instrumentation amplifier by computer, and then AD converter for data collection, and the communication channels will be sent after data modulation signal, the receiver, then were demodulated after data show results.
 The data collection and transmission system with ADC0809 and AT89S52 as the core, and the data acquisition module, demodulation module, analog channels, the test code generator, noise simulator, results showed that module, etc. The system is analyzed and discussed the structure, data acquisition and one-way transmission system components modular design method, etc. This design in traditional data acquisition based on improved, utilize FSK modulator and eight of the analog signal acquisition and one-way transmission, through the keyboard operation data channel and precise baud rate, can divide for system according to the requirement for expansion is widely applied in various data acquisition..

Keywords:ADC0809,AT89S52,FSK, TG Test Generator