体表生物电无线采集系统的设计与实现

发布时间：2018-05-03 11:05

本文选题：体表生物电 + 放大器　；参考：《天津大学》2012年硕士论文

【摘要】：体表生物电是生命活动过程中生物体表产生的各种电位变化,包括脑电、肌电和心电等,含有重要的人体生理活动和疾病信息,既可用于生命科学研究与医学临床诊治,还可为人机接口等智能机械提供操控信号。目前多数体表生物电检测为有线方式。但在一些特殊场合(如快速运动状态下生理参数检测、宇航员飞行训练中健康指标监测)的体表生物电采集与传输必须摆脱电线束缚,改用无线发送与收取方式。与有线相比,无线采集系统具有灵活方便和有效减少工频干扰的优点。本文设计并实现了一套体表生物电无线采集系统。系统由生物电信号拾取与放大滤波、无线传输和数据显示与储存三个单元组成。放大滤波单元运用了高、低通滤波和50Hz陷波手段;无线传输采用MSP430f149单片机和nRF24L01无线模块;用LabVIEW软件实现信号的显示和存储。为验证所设计系统的工作性能,在稳态视觉诱发电位(Steady State Visual Evoked Potential,SSVEP)实验中,对照分析了本系统与北京中科新拓公司的生物电放大器同时采集头皮同一部位的SSVEP信号。结果表明:两组数据频谱曲线起伏一致,相关系数为0.8352;两组信号在δ、θ、α和β各个波段能量分布比重基本相同。此外,利用本系统采集所得心电信号均能正常显示其中含有的P、QRS和T波特征;利用本系统采集所得肌肉从静止到收缩时的肌电信号,也能反映其极低频至90Hz高频的变化特征。本文设计的体表生物电无线采集系统可以为特殊场合生理参数无线检测或人机接口无线操控装置的研发及应用提供基本技术参考。
[Abstract]:Body surface bioelectricity is a variety of potential changes produced by the biological meter during life activities, including electroencephalogram, electromyography and electrocardiogram, which contains important human physiological activities and disease information. It can be used in life science research and medical clinical diagnosis and treatment, and can also provide control signals for intelligent machines, such as man-machine interface. Most of the body surface bioelectricity inspection is currently available. But in some special occasions, such as physical parameters detection in fast motion state and health index monitoring in astronaut's flight training, the collection and transmission of body surface bioelectricity must get rid of wire binding and switch to wireless transmission and collection. Compared with wired, the wireless acquisition system is flexible, convenient and effective to reduce the power frequency. The advantages of disturbing.
This paper designs and implements a set of body surface bioelectricity wireless acquisition system, which consists of three units: biologic signal pickup and amplification filter, wireless transmission and data display and storage. The amplifying filter unit uses high, low pass filtering and 50Hz trap means; wireless transmission uses MSP430f149 MCU and nRF24L01 wireless module; LabVIEW The software realizes the display and storage of the signal.
In order to verify the performance of the designed system, in the Steady State Visual Evoked Potential (SSVEP) experiment, the system and the bioelectric amplifier of Beijing Zhongke Xin Tuo company are used to collect the SSVEP signals of the same part of the scalp simultaneously. The results show that the two sets of data spectrum curves are in the same fluctuation, and the correlation system is related. The number of the signals in the two groups is basically the same in the Delta, theta, alpha and beta bands of the energy distribution. In addition, the ECG signals collected by this system can display the characteristics of P, QRS and T waves, and the muscle electrical signals of the muscle from rest to contraction can also reflect the changes in the high frequency to the high frequency of 90Hz from the system. Features.
The body surface bioelectricity wireless acquisition system designed in this paper can provide basic technical reference for the wireless detection of physiological parameters in special occasions or the development and application of man-machine interface wireless manipulating device.

【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R318.0

【参考文献】