【正文】 理病理的血流特征 ,但 人體的生物信號多屬于強噪聲背景下的低頻的弱信號 , 脈搏波信號更是低頻微弱的非電生理信號 , 必需經(jīng)過放大和后級濾波以滿足采集的要求。系統(tǒng)運行中可以通過觀察指示燈閃爍，若均勻閃爍說明測量值準確。 從脈搏 波中提取人體的生理病理信息作為臨床診斷和治療的依據(jù)，歷來都受到中外醫(yī)學界的重視。 通過觀測脈搏信號，可以對人體的健康進行檢查，通常被用于保健中心和醫(yī)院。 LCD display。 關(guān)鍵詞： STC89C52；脈搏測量儀； LCD 顯示器；光電傳感器 II Design of pulse measuring instrument based on single chip Abstract： Pulse measurement apparatus has been widely used in our daily life. In order to improve the measurement apparatus is simple and accuracy, this paper designs a pulse measuring instrument based on 51 single chip microputer. System to STC89C52 microcontroller as the core, with photoelectric sensor, and calculates the internal timer SCM system, the signal from the photoelectric sensor, microcontroller based on the accumulated pulse beat frequency signal, by the time the timer. In the running of the system can be observed through the indicator lights out, if even flicker that accurate measuring value. The system stops running, can display the total pulse number and time. After testing, the system works normally, meet the design requirements. The design of the infrared photoelectric sensor generates a pulse signal, after plastic surgery to enlarge, the input of SCM within the corresponding control, which measured within a minute of the pulse beat frequency, fast and convenient. Through observing the pulse signal, can check the health of the body, usually used for health centres and hospitals. The system can be used for measuring the pulse number o f users, but also can set the upper limit of the number of times and, when the range of the measurement range over the set of drive buzzer alarm, but users can also set the alarm clock to remind the daily measurement, time can be set, the results were finally able to pulse signal acquisition to display on the . Keywords： STC89C52。 本設(shè)計利用紅外光電傳感器產(chǎn)生脈沖信號，經(jīng)過放大整形后，輸入單片機內(nèi)進行相應(yīng)的控制，從而測量出一分鐘內(nèi)的脈搏跳動次數(shù)，快捷方便。系統(tǒng)停止運行時，能夠顯示總的脈搏次數(shù)和時間。系統(tǒng)以 STC89C52 單片機為核心，以光電傳感器利用單片機系統(tǒng)內(nèi)部定時器來計算時間，由光電傳感器感應(yīng)產(chǎn)生信號，單片機通過對信號累加得到脈搏跳動次 數(shù)，時間由定時器定時而得。 本 科 畢 業(yè) 論 文 基于 STC89C52 單片機 單片機的脈搏測量儀設(shè)計 Design of Pulse Measuring Instrument Based on Single Chip 學院名稱： 電子信息與電氣工程學院 專業(yè)班級： 111111111111111111111111111 學生姓名： 11111 學 號： 11111111111111 指導(dǎo)教師姓名： 11111111 指導(dǎo)教師職稱： 11111 2021 年 05 月 目 錄 摘要 .............................................................................................................................. I Abstract .......................................................................................................................II 引言 ..............................................................................................................................1 第一章 概述 ..............................................................................................................2 選題的背景和意義 ........................................................................................... 2 脈搏測量儀的發(fā)展與應(yīng)用 ............................................................................... 3 第二章 總體方案的論證與設(shè)計 .........................................................................5 主控模塊的選型和論證 .................................................................................... 5 顯示模塊的選型和論證 .................................................................................... 5 傳感器的選型和論證 ........................................................................................ 5 系統(tǒng)整體設(shè)計概述 ............................................................................................ 6 第三章 系統(tǒng)硬件電路設(shè)計 ..................................................................................7 主控模塊 ............................................................................................................ 7 STC89C52 單片機主要特性 .......................................................................... 7 STC89C52 單片機的中斷系統(tǒng) .................................................................... 11 單片機最小系統(tǒng)設(shè)計 ................................................................................... 11 LCD 液晶顯示器簡介 ..................................................................................... 12 液晶原理介紹 ............................................................................................... 12 液晶模塊簡介 ............................................................................................... 12 液晶顯示部分與 STC89C52 的接口 ........................................................... 13 信號采集電路設(shè)計 .......................................................................................... 14 傳感器簡介 ................................................................................................... 14 濾波 電路 ....................................................................................................... 15 放大 整形電路 ............................................................................................... 15 第四章 系統(tǒng)軟件設(shè)計 ........................................................................................ 16 系統(tǒng)軟件總體設(shè)計 .......................................................................................... 16 程序設(shè)計原理 .................................................................................................. 17 第五章 系統(tǒng)調(diào)試 .................................................................................................. 19 軟件調(diào)試 .......................................................................................................... 19 硬件調(diào)試 .......................................................................................................... 19 調(diào)試結(jié)果 .......................................................................................................... 20 誤差分析 ...............................