【正文】 .................................................................................................. 6 .................................................................................................. 6 ........................................................................................................ 7 第 3 章各部分的電路選擇與設計 ................................................................................. 9 ..................................................................................................... 9 ................................................................................................ 10 、電壓、采集電路的設計 ............................................................................ 12 ......................................................................................... 13 濾波電路的設計 ..................................................................................... 13 A/D轉(zhuǎn)換電路的設計 ............................................................................... 15 振蕩監(jiān)測系統(tǒng)電路設計 ............................................................................... 17 ...................................................................................... 18 ......................................................................................... 19 ................................................................................................ 21 第 4 章 風機的變頻調(diào)速 ............................................................................................ 23 ............................................................................ 24 ................................................................................... 25 變頻調(diào)速的硬件部分 ......................................................................................... 25 第 5 章軟件的設計 ...................................................................................................... 29 主流程設計圖 ................................................................................................... 29 ................................................................................................ 30 .......................................................................................................... 31 ......................................................................................... 32 結(jié) 論 ......................................................................................................................... 34 致 謝 ......................................................................................................................... 35 參考文獻 ..................................................................................................................... 36 附錄 1 系統(tǒng)整體硬件電路圖 ...................................................................................... 38 附錄 2 各部分電源電路圖 ......................................................................................... 39 附錄 3 電流與電壓檢測電路圖 .................................................................................. 40 附錄 4 風機變頻調(diào)速整體電路圖 .............................................................................. 41 附錄 4 單片機的部分程序 ......................................................................................... 42 Contents ABSTRACT .................................................................................................................. I ABSTRACT ............................................................................................................... II Chapter 1 Introduction..............................................................................................1 Background and Significance of Topics ........................................................1 The development of countries ........................................................................1 of the main research contents and requirements...............................4 Chapter 2 System function is introduced and program design ..........................6 description of the system performance ...................................................6 of the system .......................................................................................6 volume control...........................................................................................7 Chapter 3 The selection and circuit design of each part .....................................9 selectiong of the single chip ...........................................................................9 design of the power circuit .................................................................... 10 voltage acquisition circuit design.................................................... 12 of signal conditioning circuit ........................................................... 13 design of filter circuit ................................................................... 13 A/D conversion circuit design............................................................ 15 vibration monitoring system for circuit design................................. 17 bearing temperature detection circuit ................................................ 18 function of the circuit design ............................................................. 19 design of display circuit ......................................................................... 21 Chapter 4 Frequency control of motor speed of fan .......................................... 23 of variable frequency speed regulating device in the fan ........ 24 working characteristics of variable frequency speed regulating device ......................................................................................................................... 25 Frequency control hardware .............................................................................. 25 Chapter 5 Software design