基于PC声卡的生物医学电信号采集方法

The method based on PC sound card to acquire biomedical electronic signals

把生物医学电信号以线性调幅的方法调制在音频载波信号之上,用PC声卡采集该已调波信号,用软件实现调幅波的解调,经数字低通滤波器的滤波,恢复出生物医学电信号,达到采集和显示生物医学电信号的的目的。实践证明,该方法具有成本低、多通道工作实时性好的特点,具有实用价值。

Biomedical electric signals are modulate on audio frequency carrier signals in linear amplitude modulating,and the modulated carrier signals are sampled by PC sound card.To recover the biomedical electric signals,the modulated carrier signals sampled are demodulated by software and filtered by digital low-pass filter,and then the goal of acquiring and showing biomedical electric signals can be arrived.Having the characteristics of low cost,multi-channel working well and the value of practical use,the method have been verified actually.