基于单片机的脉象信号检测系统设计

Design of pulse image signal detection system based on single-chip machine

文章设计了一个基本的数据采集电路,即六路脉象信息,共享一个放大通道、滤波和一个转换/D电路。在采集6个信息通道时,使用单通道循环采集方法。从传感器中提取的一个信号通过模拟开关逐个放大和滤波,将从传感器中提取的约5 m V的信号放大到约5 V,并对高频部分进行滤波。文章设计了50 Hz陷波器,用于滤除信号中的50 Hz工频干扰;CPU模块主要由AT89C51单片机组成,对整个系统进行控制。该卡还对电源进行了特殊设计,可由电池和直接电源供电。

This chapter designs a basic circuit for data collection. That is, the six-way pulse information shares amplification, filtering and A/D conversion circuit. When collecting six-channel cycle acquisition, the signal extracted from the sensor is amplified and filtered one by one to amplify the signal extracted by about 5 m V to about 5 V and filter the high frequency part of the sensor. A 50 Hz trap is designed to filter the 50 Hz working frequency disturbance present in the signal. The CPU module is mainly composed of the microcontroller AT89C51 to complete the control effect on the whole system. This paper also specially designed the power supply part, which can use battery and direct municipal power supply.