【正文】 roller as the core, with the temperature sensor, flowmeter, key system, heating circuit, control switch and a hydraulic device to plete the whole system. For the core ponents of 中國 礦業(yè)大學 2021 屆 本科生畢業(yè) 設計 （ 論文 ） 第 2 頁 the machine, design of mechanical CAD diagram is given, such as grinding mechanism, a brewing chamber, and the hydraulic principle diagram. The control part of the machine, the design from two aspects of hardware and software is given by Protel circuit diagram and C language program. Keywords: grinding mechanism, hydraulic system, 89C51 SCM, C language program 1 緒論 咖啡機的歷史 二十世紀初，在意大利拿坡里附近有一位“急性子工程師”，由于他對滴漏煮咖啡所花費的時間太長感到不耐煩，所以在等待時間想出一個方法，以高溫，高壓的方式泡咖啡縮短時間，于是發(fā)明了世界上獨一無二的意大利咖啡快速調(diào)理， Espresso 也開始風行。 本文主要是設計一種全自動咖啡機的整體工作方式，包括磨豆裝置，加水燒水系統(tǒng)，釀造裝置。 目錄 全自動咖啡機的設計 ............................................................................................................. 1 摘要 ......................................................................................................................................... 1 1 緒論 ..................................................................................................................................... 2 咖啡機的歷史 ........................................................................................................... 2 國內(nèi)咖啡機發(fā)展現(xiàn)狀 ............................................................................................... 4 課題的意義及目的 ................................................................................................... 4 2 總體方案設計 ..................................................................................................................... 4 咖啡機的工作原理 ................................................................................................... 5 研磨機構設計 ............................................................................................................ 5 方案設計及原理 .............................................................................................. 5 磨盤的選擇與計算 ......................................................................................... 7 磨豆電機的計算與選擇 ................................................................................. 8 電機輸出軸的強度校核 ................................................................................. 8 鍵的選用與校核 ............................................................................................. 8 送粉電機與送粉螺旋軸 ................................................................................. 9 聯(lián)軸器 ............................................................................................................. 9 調(diào)節(jié)齒輪與調(diào)節(jié)齒 ........................................................................................ 10 螺釘與螺紋的選用 ....................................................................................... 10 調(diào)節(jié)齒輪的精度 ......................................................................................... 12 液壓系統(tǒng)的設計 ..................................................................................................... 13 液壓系統(tǒng)原理 ................................................................................................ 13 泵的選擇與計算 ........................................................................................... 15 其他液壓元件的選擇 ................................................................................... 15 釀造器的設計 .......................................................................................................... 16 3 控制部分方案的設計 ....................................................................................................... 17 全自動咖啡機控制系統(tǒng)方案基本原理 ................................................................. 17 電源 .......................................................................................................................... 18 電源的作用與組成 ........................................................................................ 19 電源工作原理 ............................................................................................... 19 穩(wěn)壓器的選用與介紹 .................................................................................... 20 控制系統(tǒng)硬件的選擇與簡介 ................................................................................. 21 硬件的選擇 ................................................................................................... 21 霍爾流量傳感器 ..................................................................................................... 23 驅(qū)動芯片 ULN2021 ................................................................................................ 24 溫度傳感器 .............................................................................................................. 25 各部分電路說明 ...................................................................................................... 26 單片機控制部分 ............................................................................................ 26 傳感器數(shù)據(jù)采集電路 .................................................................................... 27 流量計數(shù)據(jù)采集控制電路 ........................................................................... 28 撥碼開關電路圖 ........................................................................................... 29 電機控制電路圖 ........................................................................................... 30 電磁換向閥控制電路 ................................................................................... 31 整個主板電路接線圖 ................................................................................... 34 咖啡機工作流程圖 ................................................................................................. 35 4 結(jié)論與感悟 ....................................................................................................................... 37 畢業(yè)設計總結(jié) .................................................................