簡(jiǎn)易遠(yuǎn)程心電監(jiān)護(hù)系統(tǒng)

電子通信論文編號(hào):TX075        論文字?jǐn)?shù):8873,頁(yè)數(shù):23

目錄
1 摘要………………………………………………………………………………8
Abstract……………………………………………………………………………8
2 設(shè)計(jì)分析與方案論證……………………………………………………………10
  2.1 原理分析和說(shuō)明……………………………………………………………10
      2.1.1 心電信號(hào)放大電路基本原理………………………………………10
      2.1.2 心電圖原理說(shuō)明……………………………………………………10
      2.1.3 心電信號(hào)特點(diǎn)分析…………………………………………………11
  2.2 數(shù)據(jù)采集部分………………………………………………………………12
      2.2.1 前置放大部分………………………………………………………12
3 心電信號(hào)處理部分………………………………………………………………15
  3.1 屏蔽電路……………………………………………………………………15
  3.2 濾波器………………………………………………………………………15
  3.3 A/D、D/A轉(zhuǎn)換電路…………………………………………………………18
  3.4 調(diào)制與解調(diào)電路……………………………………………………………22
      3.4.1 調(diào)制器………………………………………………………………22
      3.4.2 解調(diào)器………………………………………………………………22
  3.5 3KHZ低通濾波………………………………………………………………24
      3.5.1 有源濾波……………………………………………………………24
      3.5.2 數(shù)字濾波方案………………………………………………………24
4 穩(wěn)壓電源…………………………………………………………………………25
  4.1 保護(hù)功能……………………………………………………………………26
  4.2 瞬變電壓的防護(hù)……………………………………………………………26
總結(jié)…………………………………………………………………………………28
參考文獻(xiàn)……………………………………………………………………………29

摘要
本系統(tǒng)利用高精度通用運(yùn)算放大器INA128對(duì)輸入的心電信號(hào)進(jìn)行放大，再進(jìn)行濾波，濾去頻率較高生物電信號(hào)，同時(shí)采用右腳屏蔽驅(qū)動(dòng)電路，消除50Hz干擾信號(hào)，然后通過(guò)信號(hào)變換，經(jīng)過(guò)3KHz低通濾波器（仿真普通電話信道），最后在醫(yī)院站通過(guò)信號(hào)接收和變換，實(shí)現(xiàn)醫(yī)院監(jiān)護(hù)站實(shí)時(shí)顯示。在普通示波器上得到清晰的心電波形，并可看出采樣率。
經(jīng)放大處理后的心電信號(hào)通過(guò)A/D轉(zhuǎn)換器AD7701轉(zhuǎn)換成數(shù)字信號(hào)，然后XRR2206調(diào)制電路對(duì)數(shù)字心電信號(hào)進(jìn)行調(diào)制；在醫(yī)院接收端先經(jīng)過(guò)解調(diào)電路解調(diào)，再通過(guò)D/A轉(zhuǎn)換器DAC0808轉(zhuǎn)換成模擬信號(hào)，最后在示波器上顯示心電信號(hào)波形。
關(guān)鍵詞：心電信號(hào)  儀表放大器  有源濾波  調(diào)制解調(diào)

Abstract:
This system makes use of the high accuracy  in general use operation  enlarger INA128 to carry on enlarge to the heart telecommunication number of the importation, then carry on the wave of  , the  goes to the frequency  higher living creature  telecommunication number, adopting the right foot to shield to drive the electric circuit at the same time, remove the 50 Hz  interference signal, then pass the signal transformation, through a filter( imitate the true common telephone  letter way) of 3 KHz, the end stands to receive through a signal at the hospital and transformation, carry out the hospital guardianship station to show for solid hour.Show a machine in the commonness up get the clear heart  electric wave form, and can see a sample rate.
Pass through enlarge the heart telecommunication number of handle the empress the A/ D  conversion machine  AD7701 conversion become the numerical signal, then the XRR2206 make the electric circuit logarithms  word heart  telecommunication number to carry on make;Receive to carry at the hospital to adjust the electric circuit solution to adjust through solution first, then pass the D/ A  conversion machine DAC0808 conversion to become the emulation signal, the end shows the heart telecommunication  number a form in showing a machine.
Keyword:  The heart electricity  signal appearance enlarger contain the source  wave make the solution to adjust