字数:10655.页数:28 论文编号:JD378
简易远程心电监护系统
1、摘要
本系统利用高精度通用运算放大器INA128对输入的心电信号进行放大，再进行滤波，滤去频率较高生物电信号，同时采用右脚屏蔽驱动电路，消除50Hz干扰信号，然后通过信号变换，经过3KHz低通滤波器（仿真普通电话信道），最后在医院站通过信号接收和变换，实现医院监护站实时显示。在普通示波器上得到清晰的心电波形，并可看出采样率。
经放大处理后的心电信号通过A/D转换器AD7701转换成数字信号，然后XRR2206调制电路对数字心电信号进行调制；在医院接收端先经过解调电路解调，再通过D/A转换器DAC0808转换成模拟信号，最后在示波器上显示心电信号波形。
关键词：心电信号 仪表放大器 有源滤波 调制解调
The simple long range heart electricity serves as guardian the system
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
