基于单片机AT89C52的血流信号采集系统的设计

根据红光和红外光透过手指后光吸收量变化的特点,本文研究了基于单片机AT89C52的血流信号采集系统。该文设计了血流信号检测电路,研究了四点累加平均滤波和五点滑动平均滤波算法,有效的滤除了信号的高频噪声,克服了因个人生理差异引起的信号基线漂移、易饱和等问题。通过VB编程,实现了单片机和PC机之间的串行通信。

Design of Blood Signal Acquisition System Based on Single-Chip Microprocessor AT89C52

According to the characteristic of red light and infrared light having change after uptake finger,this paper has studied blood signal acquisition system that based on single-chip microprocessor AT89C52.It has designed circuit of blood signal detection,and has studied algo-rithms of averaging filter for four data and averaging filter for five data,and it is effective to filter the noise of high frequency of signal, has surmounted the problems such as the signal drift and easy saturation of base line because of personal physiological discrepancy. It has realized the serial communication between single-chip microprocessor and personal computer by VB.