【正文】 tricity coupling isolates, stepbysteps the motordriven electric circuit, the interrupt processing electric circuit and some auxiliary circuit design。 關(guān)鍵詞 三自由度 滾珠絲杠 MCS51 II Abstract This design introduced one bed of medical treatment which has three degrees of freedom system and the control system design first par t mainly is to the the bed of medical treatment milling machine length feed systematic, the cross feed systematic and the vertical to feed system length feed systematic and the cross feed system all uses adjusts high transmission efficiency and high accuracy of ball screw drive?？v向進(jìn)給系統(tǒng)和橫向進(jìn)給系統(tǒng)都采用 精度高傳動(dòng)效率高的滾珠絲杠副傳動(dòng) ；系統(tǒng)中滾珠絲杠螺母副的使用，可以使旋轉(zhuǎn)運(yùn)動(dòng)輕易地轉(zhuǎn)換為直線運(yùn)動(dòng)；垂直進(jìn)給系統(tǒng)采用絲桿升降機(jī)結(jié)構(gòu)，既可滿足運(yùn)動(dòng)需求又可達(dá)到縮小機(jī)體大小的目的。 I 摘 要 本設(shè)計(jì)介紹了一種具有三自由度的 醫(yī)療床，主要介紹了 其 機(jī)械 系統(tǒng)和控制系統(tǒng)的設(shè)計(jì)過程。第一部分主要是對(duì)醫(yī)療床的縱向進(jìn)給系統(tǒng)、橫向進(jìn)給系統(tǒng)和垂直進(jìn)給系統(tǒng)的設(shè)計(jì)。第二部分為控制系統(tǒng)硬件電路的設(shè)計(jì)，以單片機(jī)為主體的控制單元可以快捷方便的完成進(jìn)給任務(wù)，其中包括 8051單片機(jī) 選擇與應(yīng)用、光電耦合隔離、步進(jìn)電機(jī)驅(qū) 動(dòng)電路、中斷處理電路和一些輔助電路的設(shè)計(jì) ；對(duì)于醫(yī)療床行程的檢測，設(shè)計(jì)中采用了以 傳感器為檢測元件的位置檢測電路，該電路可以實(shí)現(xiàn)行程辯向和行程測量的目的。 In the system the ball bearing guide screw nut viceuse, may cause the rotary motion to transform easily into the translation。 Regarding the bed of medical treatment traveling schedule examination, in the design used as examined the part take the diffraction encoder sensor the position examination electric circuit, this electric circuit might realize the traveling schedule to debate to with the traveling schedule survey goal. Key words three degrees of freedom ball bearing guide screw medical MCS51 III 目 錄 摘 要 ....................................................................................................................... I Abstract ..................................................................................................................... II 第 1章 緒論 .......................................................................................................... 1 課題背景 ................................................................................................... 1 醫(yī)用三自由度治療床國內(nèi)外發(fā)展情況 ................................................. 1 研究目的和意義 ....................................................................................... 2 本文主要內(nèi)容 ........................................................................................... 2 第 2章 醫(yī)用三自由度醫(yī)療床總體設(shè)計(jì) ............................................................. 3 三自由度醫(yī)療床機(jī)械結(jié)構(gòu)方案制定 ...................................................... 3 設(shè)計(jì)要求 ........................................................................................ 3 設(shè)計(jì)參數(shù) ........................................................................................ 3 總體方案設(shè)計(jì) ................................................................................ 3 三自由度醫(yī)療床控制系統(tǒng)設(shè)計(jì) .............................................................. 3 設(shè)計(jì)要求 ........................................................................................ 3 總體方案設(shè)計(jì) ................................................................................ 4 第 3 章醫(yī)用三自由度醫(yī)療床機(jī)械結(jié)構(gòu)設(shè)計(jì) ......................................................... 5 設(shè)計(jì)目標(biāo)和要求 ....................................................................................... 5 X 方向進(jìn)給系統(tǒng)設(shè)計(jì) ............................................................................ 5 .................................................................... 5 選擇驅(qū)動(dòng)電機(jī)的型號(hào) .................................................................... 5 滾珠螺母副的精度等級(jí)和型號(hào)確定 ........................................... 6 Y 方向進(jìn)給系統(tǒng)設(shè)計(jì) ................................................................................ 6 確定軸承的規(guī)格型號(hào) .................................................................... 6 選擇驅(qū)動(dòng)電機(jī)的型號(hào) .................................................................... 6 滾珠絲杠螺母副等級(jí)精度和型號(hào)確定 ....................................... 6 Z 方向進(jìn)給系統(tǒng)設(shè)計(jì) ................................................................................ 7 蝸輪絲桿升降機(jī)的規(guī)格與型式 ................................................... 7 IV 蝸桿傳動(dòng)的材料選擇 .................................................................... 8 齒面接觸疲勞強(qiáng)度的計(jì)算 ............................................................ 8 蝸輪輪齒的彎曲強(qiáng)度計(jì)算 .......................................................... 9 蝸桿軸的剛度計(jì)算 ...................................................................... 10 垂直導(dǎo)軌摩擦力計(jì)算 ...................................................................11 傳動(dòng)系統(tǒng)的剛度計(jì)算 .................................................................. 13 傳動(dòng)的誤差計(jì)算與分析 .............................................................. 14 電動(dòng)機(jī)的選擇 ............................................................................. 14 第 4 章三自由度醫(yī)療床控制系統(tǒng)的設(shè)計(jì) ........................................................... 16 控制系統(tǒng)整體方案 ................................................................................ 16 控制方案的設(shè)計(jì)與選擇 .............................................................. 16 控制系統(tǒng)硬件電路的方案設(shè)計(jì) ................................................. 16 中央處理單元的類型選擇 ........................................................ 17 系列單片機(jī)簡介 ............................................................ 17 步進(jìn)電機(jī)驅(qū)動(dòng)電路設(shè)計(jì) ........................................................................ 18 顯示電路設(shè)計(jì) ......................................................................................... 20 單片機(jī)電源電路的設(shè)計(jì) ........................................................................ 20 傳感器的選擇 ......................................................................................... 21 第 5 章技術(shù)可行性分析 ........................................................................................ 23 結(jié)論 ......................................................................................................................... 24 致謝 ......................................................................................................................... 25 參考文獻(xiàn) ..