【正文】 he content need consider function and demand of the design object,then division conduct according to the module of each different function, therefore the module of hardware in this paper is divided into main control module,signal acquisition module, display module, buzzer module, keyboard module. Pulse meter using infrared sensors to collect the pulse signal, after shaping and amplifying,enter the signal to the single chip microputer to corresponding control, which measured within the pulse beat frequency in a minute, convenient and fast. System main control chip use STC89C52, the pulse signal acquisition to display on the LCD1602. I in electronic pulse meter design, step by step in different functional modules of study, to the core of the scientific and technological achievements of the study before and now better ponents, pare, and finally to every part of the final choice together, form a plete excellent electronic pulse meter, so we can understand the specific ponent model and the function, not only in theory of textbooks. I am in the process of classification, parison and design, system review again the university to study a variety of professional knowledge, and to many disciplines together, flexible application. In the end, I start to make the electronic pulse meter, when their own design electronic pulse meter physical done finally, accurate 山西 農(nóng)業(yè)大學(xué)信息學(xué)院畢業(yè)設(shè)計 III measured their pulse of The Times, a kind of happiness to let my heart excited, I know it will be a stepping stone in my life, let me confidence further. Keywords: electronic pulse meter 51 single chip microputer hardware design software design 山西農(nóng)業(yè)大學(xué)信息學(xué)院畢業(yè)設(shè)計 I 目 錄 1 序 言 ........................................................................................................................ 1 課題的來源及意義 ........................................................................................ 1 電子脈搏計發(fā)展現(xiàn)狀 .................................................................................... 2 本論文的研究工作安排 ................................................................................ 2 2 系統(tǒng)方案的論證與選型 .......................................................................................... 3 系統(tǒng)整體設(shè)計 ................................................................................................ 3 信號采集電路論證與選型 ............................................................................ 3 主控模塊論證與選型 .................................................................................... 4 顯示模塊論證與選型 .................................................................................... 5 3 系統(tǒng) 硬件電路設(shè)計 .................................................................................................. 6 信號采集電路設(shè)計 ........................................................................................ 6 紅外光電傳感器 .................................................................................... 6 放大濾波電路 ........................................................................................ 7 整形電路 ................................................................................................ 7 主控模塊 ........................................................................................................ 8 STC89C52 芯片的特點 .......................................................................... 8 STC89C52 芯片的中斷系統(tǒng) .................................................................. 9 LCD 液晶顯示器簡介 ................................................................................. 10 液晶原理介紹 ...................................................................................... 10 液晶模塊簡介 ...................................................................................... 10 液晶顯示部分與 STC89C52 的接口 .................................................. 12 鍵盤模塊設(shè)計 .............................................................................................. 13 蜂鳴器模塊設(shè)計 .......................................................................................... 13 4 系統(tǒng)軟件設(shè)計 ........................................................................................................ 15 系統(tǒng)軟件流程 .............................................................................................. 15 程序設(shè)計原理 .............................................................................................. 16 5 總結(jié)展望 ................................................................................................................ 18 致 謝 .......................................................................................................................... 19 參考文獻(xiàn) ...................................................................................................................... 20 附 錄 ............................................................................................................................ 21 山西農(nóng)業(yè)大學(xué)信息學(xué)院畢業(yè)設(shè)計 II 附錄 I 系統(tǒng)整體原理圖 .................................................................................. 21 附錄 II PCB 圖 .................................................................................................. 22 附錄 III 系統(tǒng)仿真圖 ............................................................................................ 22 附錄 IV 系統(tǒng)源程序 ........................................................................................... 23 附錄 V 實物圖 ................................................................................................... 38 山西農(nóng)業(yè)大學(xué)信息學(xué)院畢業(yè)設(shè)計 1 1 序 言 課題的來源及意義 人脈搏的跳動情況，一直是中外醫(yī)學(xué)診斷、治療的一個重要依據(jù)。大規(guī) 模集成電路的 不斷 發(fā)展，使得單片機(jī) 這項技術(shù) 得以問世 。 電子脈搏計可以 準(zhǔn)確 地對脈搏跳動 的 情況進(jìn)行實時 地 監(jiān)測，能夠反映 出脈搏的 均勻 狀況 ，監(jiān)測 瞬時 脈搏和 平均 脈搏。并且自動監(jiān)測 也為自動控制創(chuàng)造了先決條件，自動監(jiān)測設(shè)備監(jiān)測到的真實情況反饋到中央處理器，中央處理器進(jìn)行進(jìn)一步判斷，才能實現(xiàn)自動控制。 設(shè)計的電路選用 紅外 光電 傳感器 ， 把脈搏跳動轉(zhuǎn) 化為電信號，放大 、 濾波。 需要 測 量 的兩種信號經(jīng)通道選擇 以 后 ， 再 來 進(jìn)行顯示 。 第 三 章 ：描述電子脈搏計的硬件設(shè)計，按照各個模塊需要實現(xiàn)的功能，設(shè)計電路將幾個模塊連接起來，最終實現(xiàn)總體的功能。 電子脈搏計由光電傳感器、