基于單片機的阻抗測量分析儀的設計

論文編號:JD1155  論文字數:9988,頁數:41

摘  要

 本阻抗測量分析儀以Soc單片機C8051F020為控制和數據處理核心，由正弦信號發生模塊、功率放大模塊、阻抗模測量模塊、阻抗角測量模塊、網絡負載以及人機接口模塊組成。采用數字控制DDS芯片AD9851產生100Hz－10KHz正弦信號，經濾波、電壓放大和功率放大后驅動網絡負載。從網絡負載中取測量信號輸入到以真有效值轉換集成芯片AD637為核心的電壓和電流測量電路構成的阻抗模測量模塊中進行負載測量。阻抗角測量模塊是從阻抗模測量模塊中取一組信號經過零比較后使用鑒相器和計數器對信號相位差測量。把上述的測量結果經單片機處理后用液晶顯示。為了提高測量精度，將各部分電路的誤差合理分配，使電路達到最佳測量效果。
關鍵詞：阻抗，DDS，AD637，阻抗測量分析儀

Abstract

 This impedance measure analyzer take Soc microcontroller C8051F020 as the core of the control and the data processing, which is composed of the sine signal generator module, the power enlargement module, the impedance survey module, the impedance angle survey module, the network load as well as the man-machine interface module. The 100 - 10 KHz sine signal is generated by AD9851, which drivers the network load after passing the filter, the voltage amplification and the power enlarges module. The impedance survey module is composed of voltage and current metering module, which takes AD637 as the core, which the survey signal is metered in. The impedance angle survey module takes a group of signals from the impedance survey module to the zero detecting module to survey the shift of phase of the signal. The above measurement result which is processed by the microcontroller is shown in the LCD. In order to increase the measuring accuracy, error is distributed rational to each part of electric circuits, which achieves the best survey effect of the electric circuit.
Keywords: impedance, DDS, AD637, impedance measure analyzer

目  錄

第一章  概述
 1.1 課題背景
 1.2 課題意義
第二章  系統方案論證 1
 1.1 系統原理介紹 1
 1.2 方案論證 1
 1.2.1 方案選擇 2
 1.2.2 方案組成及框圖 4
1.3 部分選用芯片簡介 5
1.3.1  Soc單片機C8051F020 5
1.3.2  直接數字頻率合成芯片AD9851 6
第三章  系統硬件設計 8

第四章  系統軟件設計 17
3.1 Silicon Lab集成開發環境介紹 17
第五章  系統調試 34
4.1 硬件電路調試 34
4.2 軟件調試過程 34
4.2.1 調試軟件的使用 35
4.2.2 功能模塊調試 38
4.2.3 操作說明 38
4.3 調試結果 39
第六章   總   結 40
致   謝 41
參考文獻 42
附件：整機電路圖 43