【正文】 speed measuring instrument. The system is the motor speed measurement, and PC and can municate that the motor speed, and to observe the motor running the basic situation. The main design AT89C51 control as the core, by the Hall sensor, LED digital CRT, HIN232CPElevel conversion, and a RS232. Detailed measurements of the speed of the SCM system and PC and the serial munication between the microcontroller. Give full play to the performance of the SCM. This paper is to measure the speed and displayed in five LED digital pipe. The advantage of a simple hardware and software capabilities improve, measuring speed, high precision and control system reliable, costeffective and so on. Keywords SC51(Onechip puter)； sensor； Tachometer 哈爾濱理工大學(xué)學(xué)士學(xué)位論文 III 目錄 摘要 …… ............................................................................................................... I Abstract ................................................................................................................II 第 1 章 緒論 ........................................................................................................ 5 課 題背景 ................................................................................................... 5 國內(nèi)外發(fā)展水平 ....................................................................................... 5 單片機(jī)測控系統(tǒng) ....................................................................................... 6 轉(zhuǎn)速測量在國民經(jīng)濟(jì)中的應(yīng)用 ............................................................... 7 幾種常見的 轉(zhuǎn)速測量方法 ....................................................................... 8 主要內(nèi)容 ................................................................................................... 9 第 2 章 硬件電路設(shè)計(jì) ...................................................................................... 10 系統(tǒng)總體功能概述 ................................................................................. 10 硬件電路設(shè)計(jì) ......................................................................................... 11 單片機(jī)模塊 ............................................................................................. 11 處理執(zhí)行元件 .................................................................................. 12 時(shí)鐘電路 .......................................................................................... 16 復(fù)位電路 .......................................................................................... 16 顯示 電路 .......................................................................................... 17 霍爾傳感器簡介 ..................................................................................... 20 霍爾器件概述 .................................................................................. 20 霍爾傳感器的應(yīng)用 .......................................................................... 21 AH41 霍爾開關(guān) ................................................................................ 21 發(fā)送模塊 ................................................................................................. 22 本章小結(jié) ................................................................................................. 25 第 3 章 軟件設(shè)計(jì) .............................................................................................. 26 單片機(jī)轉(zhuǎn)速程序設(shè)計(jì)級思路過程 ......................................................... 26 單片機(jī)程序設(shè)計(jì)思路 ...................................................................... 26 單片機(jī)轉(zhuǎn)速計(jì)算程序 ...................................................................... 27 二 十進(jìn)制轉(zhuǎn)換程序 ........................................................................ 27 程序設(shè)計(jì) ................................................................................................. 30 本章小結(jié) ................................................................................................. 31 第 4 章 系統(tǒng)調(diào)試 .............................................................................................. 32 硬件調(diào)試 ................................................................................................. 32 軟件調(diào)試 ................................................................................................ 32 綜合調(diào)試 ................................................................................................. 34 故障分析與解決方案 ............................................................................. 34 本章小結(jié) ................................................................................................. 35 哈爾濱理工大學(xué)學(xué)士學(xué)位論文 IV 結(jié)論 .................................................................................................................... 36 致謝 .................................................................................................................... 37 參考文獻(xiàn) ............................................................................................................ 38 附錄 .................................................................................................................... 39 附錄 1 電路原理圖 ....................................................................................... 39 附錄 2 元器件清單 ....................................................................................... 40 哈爾濱理工大學(xué)學(xué)士學(xué)位論文 5 第 1章 緒論 課題背景 轉(zhuǎn)速是工程中應(yīng)用非常廣泛的一個參數(shù)，其測量方法較多，而模擬量的采集和模擬處理一直是轉(zhuǎn)速測量的主要方法，這種測量方法已不能適應(yīng)現(xiàn)代科技發(fā)展的要求，在測量范圍和測量精度上，已不能滿足大多數(shù)系統(tǒng)的使用。 關(guān)鍵詞 MSC51（單片機(jī)）；轉(zhuǎn)速；傳感器 哈爾濱理工大學(xué)學(xué)士學(xué)位論文 II [89 C51 based on the speed measurement system in the design] Abstract In the project practice, we will meet each kind to need frequently to survey the rotational speed the situation, the survey rotational speed method divides into the simulation type and the digital two kinds. The simulation type uses measured that the fast generator is the detecting element, obtains the signal simulates the quantity. Digital usually uses the electrooptical encoder, the Hall part and so on is the detecting element, ob