应用于肌电采集的电极脱落检测系统设计  

Design of electrode drop detection system applied to electromyography acquisition

作　　者：马掌印 李武森[1] 陈文建[1] Ma Zhangyin;Li Wusen;Chen Wenjian(School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学电子工程与光电技术学院

出　　处：《电子技术应用》2019年第10期112-115,120,共5页Application of Electronic Technique

摘　　要：针对肌电采集过程中电极易脱落且不易被发现的问题,设计了一种应用于肌电采集的电极脱落检测系统。主要利用集成运放LM358在单电源供电模式下设计成跟随器时,同相端悬空会输出稳定的高电平的特性,并利用肌电采集系统中右腿驱动电路的反馈电压,设计出一种可以与肌电采集系统有效结合的电极脱落检测电路。为了降低因干扰产生的误检问题,给出了STM32单片机检测电极脱落时降低误检的算法。在实际的电路应用中,该电极脱落检测系统取得了很好的检测效果。Aiming at the problem that electrodes are easy to fall off and not easy to be found in the process of electromyography acquisition, a detection system for electrodes falling off applied in electromyography acquisition is designed. In this paper, an integrated operational amplifier LM358 is designed as a follower under the single power supply mode. It can output a stable high level when the same phase end is suspended. By using the feedback voltage of the driven right leg circuit in the electromyography acquisition system, an electrodes drop detection circuit which can be effectively combined with the electromyography acquisition system is designed. In order to reduce the problem of false detection caused by interference, the algorithm of reducing false detection when STM32 single chip computer detects the electrode falling off is given. In the actual circuit application, the electrode drop detection system has achieved good detection results.

关 键 词：表面肌电信号 肌电采集 电极脱落检测 LM358 

分 类 号：TN409[电子电信—微电子学与固体电子学]