集成技术2016，Vol.5Issue(6)：1-9,9.
基于屏蔽驱动的工频干扰抑制技术研究
The Study of Reducing Power-Line Interferences Based on Shielding Technologies
摘要
Abstract
There are always interferences in environment, especially power-line interferences, when we collect biomedical signals such as electrocardiogram, electromyogram and electroencephalogram. Moreover, the noise amplitude is usually much larger than that of the physiological signals, making the subsequent signal analysis and processing very difficult. The conventional methods are to pass the collected signal through a software filter for reducing the effects of power-frequency interferences. However, it would cause the reduction and distortion of the target signal. In order to solve this problem, this study proposed a novel design of hardware circuit based on the shielding technology, which can intensively inhibit the power-frequency interferences mixed in the original signal in analog front end. The experiments of both electrocardiogram and electromyogram acquisitions carried out on TI ADS1299 platform showed that the power-line interferences could be signiifcantly suppressed when the electrode was electronically shielded. By comparing the conditions when the shielding layer was connected to different driving signals, it was found that the attenuation of the power-frequency interferences could reach as high as 35 dB when the electrode was shielded by signal itself. The shielding technology proposed in this study could be used in a variety of biomedical signal acquisitions to reduce power-frequency interferences at the initial stage, and therefore it could essentially enhance the signal to noise ratio of biomedical signals.关键词
生理电信号采集/屏蔽驱动/工频干扰Key words
biomedical signal acquisition/shielding technologies/power-line interferences分类
信息技术与安全科学引用本文复制引用
姜言冰,纪宁,杨子健,王辉,陈世雄,李光林..基于屏蔽驱动的工频干扰抑制技术研究[J].集成技术,2016,5(6):1-9,9.基金项目
深圳市基础研究项目(JCYJ20140610152828679)；国家自然科学基金青年科学基金项目(61302037、61603375)；深圳市海外高层次人才孔雀技术创新项目(KQJSCX20160301141522527) （JCYJ20140610152828679）
