双频率阻抗式呼吸检测系统的设计  

Design of a Dual-Frequency Impedance Respiratory Detecting System

作　　者：王建波[1] 李涛[1] 

机构地区：[1]临沂市人民医院设备与医学工程部,山东临沂276003

出　　处：《中国医疗设备》2015年第5期28-29,9,共3页China Medical Devices

摘　　要：本文介绍了一种双频率阻抗式呼吸检测系统的设计过程。该系统基于生物阻抗法,在频域上采用双频率获取呼吸信号来降低运动干扰的影响;在空间上将两路呼吸信号进行空域叠加来降低干扰;在时域上采用软件滤波的方法来提高信噪比。样机的初步人体试验证明该系统运行稳定,抗干扰性能好。This paper introduced the design of a bio-impedance-based dual-frequency respiratory detecting system. Two different high frequencies were used in this system to obtain the respiratory signals so as to reduce the motion artifacts. Two channels of respiratory signals were super-positioned in order to reduce the noise in space. And the software iflter methods were also used to improve the signal to noise ratio. The preliminary human experiment of the sample machine demonstrated its stable performance and reduction of interference noises.

关 键 词：双频率 呼吸频率 生物阻抗 信噪比 单片机 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]