| 基于USB接口的三道生理信号检测仪电路设计 |
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| 引用本文： | 陈晓宇,杨航,Chen Xiao-yu,Yang hang.基于USB接口的三道生理信号检测仪电路设计[J].河南机电高等专科学校学报,2008,16(4):18-20. |
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| 作者姓名： | 陈晓宇 杨航 Chen Xiao-yu Yang hang |
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| 作者单位： | 河南机电高等专科学校,电子通信工程系,河南,新乡453002 |
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| 摘 要： | 介绍了用于心电、心音、胸阻抗信号测量的三道生理信号检测仪的硬件电路设计,着重描述了三种信号的放大、滤波、串行A/D转换及USB接口电路,前置放大使用了仪表放大器结构提高电路的共模抑制比,采用对消方法有效地抑制了电路中的各种共模干扰,设计了专门用于消除50 Hz工频干扰的50 Hz陷波器。实测表明,所检测到的三道生理信号都能满足临床应用,达到了设计要求。
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| 关 键 词： | 心电信号 心音信号 胸阻抗信号 工频干扰 |
Circuit Design of a USB-based Three Channels Physiological Apparatus |
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| Chen Xiao-yu,Yang hang.Circuit Design of a USB-based Three Channels Physiological Apparatus[J].Journal of Henan Mechanical and Electrical Engineering College,2008,16(4):18-20. |
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| Authors: | Chen Xiao-yu Yang hang |
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| Affiliation: | CHEN Xiao - yu, et al (Dept. of Electronic and Communication Engineering, Henan Mechanical and Electrical Engineering College, Xinxiang 453002, China) |
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| Abstract: | This paper presents the measuring principle for three kinds of physiological signals, namely electrocardiogram, heart sound and impedance cardiography. We also propose a hardware circuit design of a three - channels physiological apparatus for measuring the aforementioned signals. In this paper, we emphasize on sampling, magnifying and sieving these three physiological signals. In particular, we take advantage of instrument amplifier structure to promote KCMR of the circuit. In addition, we design a band reject filter in order to eliminate 50Hz power frequency noise. Our experiments demonstrate that three physiological signals can satisfy clinical application. |
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| Keywords: | electrocardiogram （ECG） heart sound impedance cardiography （ICG） power frequency noise |
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