基于單片機控制的多路電參數

電氣工程論文編號:DQ111   論文字數:13407,頁數:35

目 錄摘 要 I
1  緒論 1
 1.1  引言 1
 1.2  數據采集系統的發展歷史及研究現狀和發展趨勢 1
 1.3  研究內容 5
2  主芯片及軟件介紹 3
2.1 單片機芯片AT89C52介紹 3
    2.1.1 概述 3
  2.1.2 主要功能特性 3
2.2 AD0808芯片簡介 6
2.3 硬件開發環境Proteus簡介 7
  2.3.1 界面簡介 8
  2.3.2 操作簡介 10
3  多路電參數采集系統硬件設計 11
3.1  總體設計方案 11
3.2  電源電路電路設計 13
3.3  復位及時鐘電路設計 13
3.4  AD0808與單片機接口電路設計 14
3.5  74ls74分頻器設計 16
3.6  LED顯示電路設計 16
4  多路電參數采集系統軟件設計 18
4.1  主程序 18
4.2  AD轉換程序  19
4.3  數據處理程序  20
5  多路電參數采集系統軟硬件調試 23
5.1  測量系統硬件調試 23
 5.1.1  脫機調試 23
 5.1.2  仿真調試 23
5.2  測量系統軟件調試 25
   5.3 性能測試與分析 26
6  總結 27
致 謝 28
參考文獻 29
附錄a 多路電參數采集系統源程序 30

摘  要
    現代測量中，多路測量已成為日益重要的測量技術。國內現在已有不少數據測量和采集的系統，但很多系統存在功能單一、采集通道少、采集速率低、操作復雜并且對測試環境要求較高等問題。人們需要一種應用范圍廣、性價比高的數據采集系統。
    分析了不同類型的單片機的特點及及外圍芯片性能的基礎上，設計了單片機控制的多路電采集系統，并給出了該系統硬件、軟件實現的方法及該系統的性能測試及分析。基于單片機的多通道數據采集系統將采樣信號通過處理，通過鍵盤控制所要選通采集的數據，輸入AD轉換為數字信號后由單片機采集，然后利用單片機進行數據的存儲、后期處理通過四位LED數碼管顯示采集數據。該數據采集系統數據處理功能強大、顯示直觀、界面友好、性價比高，可廣泛應用于工業控制、儀器、儀表、機電一體化、智能家居等諸多領域。

關鍵詞：數據采集，多通道，單片機，AD轉換

Abstract

In modern measurement techniques, multi-channel measurement has become an increasingly important measurement technique . Now there are a lot of data measurements and acquisition systems.However, some of them lock of multifunction,enough collection, high sampling rate and simple operation and need specific  test environment and so  on.People need a wide range of applications, cost-effective data acquisition system. After analyzing the characteristics of different types of microcontroller and external chip performance, the system of multi-channel electrical acquisition system is designed。The design gives the system's hardware, software methods ,the system performance test and analysis. This paper analyzed the characteristics and performance of external chip with different types of microcontroller, designed multi-channel electrical parameters acquisition system based on the microprocessor technology, given the hardware and software method of system. The design of Multi-channel data acquisition system processed the sample signals, through the keyboard to control the collection of data and using AD converting into digital signals, then used single chip to store and process data, displayed collected data via four LED at last. The data acquisition system with a powerful data processing, intuitive display, user-friendly, and cost-effective, can be widely used in industrial control, instruments, meters, mechanical and electrical integration, intelligent home and many other fields.

Key words:  data acquisition, multi-channel, MCU, AD conversion