基于肌电信号分析研究柔性电极设计参数对电极性能的影响
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摘要
柔性电极因其穿戴式表面肌电采集的优势而得到研究学者的广泛关注,但很少有研究针对柔性电极的设计参数提供明确的指导和规范。本实验首先对可能影响电极性能的参数进行了分析;然后利用柔性印刷工艺与喷墨印刷工艺制作5种不同规格的柔性干电极,并将其与商用湿电极进行对比,设计基于尺侧腕伸肌的肌电采集实验,得到100个表面肌电信号段;最后对信号段的时频域特性进行分析,从而确定相关参数对电极性能的影响。结果表明增加电极高度后的有源柔性印刷电路板电极具有更好的信号采集性能。
Flexible electrode has received wide attention from researchers because of its advantages in wearable surface electromyography signal acquisition. However, few studies have provided clear guidance and specifications for the design parameters of flexible electrode. Herein the parameters that may affect the performance of the electrode are analyzed. Five kinds of flexible dry electrodes of different specifications fabricated by flexible printing process and inkjet printing process are compared with the commercial wet electrode. The electromyography signal acquisition experimentation based on ulnar wrist extensors is designed to obtain 100 surface electromyography signal segments. Finally, the time-frequency domain characteristics of the signal segment are analyzed, thereby determining the effect of the relevant parameters on the electrode performance. The results show that the active flexible printed circuit board electrodes after increasing the electrode height have a better signal acquisition performance.
Flexible electrode has received wide attention from researchers because of its advantages in wearable surface electromyography signal acquisition. However, few studies have provided clear guidance and specifications for the design parameters of flexible electrode. Herein the parameters that may affect the performance of the electrode are analyzed. Five kinds of flexible dry electrodes of different specifications fabricated by flexible printing process and inkjet printing process are compared with the commercial wet electrode. The electromyography signal acquisition experimentation based on ulnar wrist extensors is designed to obtain 100 surface electromyography signal segments. Finally, the time-frequency domain characteristics of the signal segment are analyzed, thereby determining the effect of the relevant parameters on the electrode performance. The results show that the active flexible printed circuit board electrodes after increasing the electrode height have a better signal acquisition performance.
引文
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[15]MAROZAS V, PETRENAS A, DAUKANTAS S, et al. A comparison of conductive textile-based and silver/silver chloride gel electrodes in exercise electrocardiogram recordings[J]. J Electrocardiol, 2011, 44(2):189-194.
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[17]JUNG J M, CHA D Y, KIM D S, et al. Development of PDMS-based flexible dry type SEMG electrodes by micromachining technologies[J]. Appl Phys A, 2014, 116(3):1395-1401.
[18]DE LUCA C J. Surface electromyography:detection and recording[Z].Del Sys Incorporated, 2002. http://www.docin.com/p-399682614.html.
[19]乐珺,徐胤,薛卉. SEMG测量电路在外骨骼上肢康复机器人中的应用[J].机械制造与自动化, 2017, 46(2):146-149.LE J, XU Y, XUE H. Application of SEMG measuring circuit in exoskeleton upper limb rehabilitation robot[J]. Machine Building&Automation, 2017, 46(2):146-149.
[20]鲜星宇,王涛,林霖,等.便携式人体生物电传感器[J].仪表技术与传感器, 2012, 3:6-8.XIAN X Y, WANG T, LIN L, et al. Design of portable bioelectricity sensor[J]. Instrument Technique and Sensor, 2012, 3:6-8.
[2]夏玲,王磐,吴春芳,等.表面肌电图在周围神经损伤修复过程中的应用价值[J].中国组织工程研究, 2019, 23(7):1142-1148.XIA L, WANG P, WU C F, et al. Application value of surface electromyography in the repair of peripheral nerve injury[J]. Chinese Journal of Tissue Engineering Research, 2019, 23(7):1142-1148.
[3]周明娟,逯迈.基于高阶滤波的肌电信号采集电路设计[J].传感技术学报, 2018, 31(1):54-60.ZHOU M J, LU M. Design of EMG signal acquisition circuit based on high-order filter[J]. Chinese Journal of Sensors and Actuators,2018, 31(1):54-60.
[4]王粉娟,秦刚,王靖宇. SEMG检测电极的设计[J].电子设计工程,2011, 19(1):190-192.WANG F J, QIN G, WANG J Y. Design of SEMG detection electrode[J]. Electronic Design Engineering, 2011, 19(1):190-192.
[5]董中飞,陈香,邓浩,等.柔性同心圆差分阵列表面肌电电极研制[J].电子测量与仪器学报, 2012, 26(4):359-366.DONG Z F, CHEN X, DENG H, et al. Design of differential concentric ring sEMG electrode array based on flexible printed circuit[J]. Journal of Electronic Measurement and Instrumentation, 2012, 26(4):359-366.
[6] ZHANG X, HUANG H. A real-time, practical sensor fault-tolerant module for robust EMG pattern recognition[J]. J Neuroeng Rehabil,2015, 12(1):1-16.
[7]张恒毅,陈香.有源柔性表面肌电电极阵列设计[J].电子测量与仪器学报, 2014, 28(8):901-908.ZHANG H Y, CHEN X. Design of active surface EMG electrode array based on flexible material[J]. Journal of Electronic Measurement and Instrumentation, 2014, 28(8):901-908.
[8] MARCO G. Low cost inkjet printing for the fast prototyping of surface EMG detection systems[C]. 2015 IEEE International Symposium on Medical Measurements and Applications, 2015:97-99.
[9] YASSER K, FELIPPE J. Inkjet-printed flexible gold electrode arrays for bioelectronic interfaces[J]. Adv Funct Mater, 2015, 26:1004-1013.
[10]LIN M, NAN L I, FAN L I, et al. Design of muscular bioimpedance measurement system[M]. Lancaster:DEStech Transactions on Computer Science and Engineering, 2019.
[11]陈晓.面向生理检测的电子织物研究[D].成都:电子科技大学, 2017.CHEN X. Research on electronic fabrics for physiological detection[D]. Chengdu:University of Electronic Science and Technology of China, 2017.
[12]侯文生,杨丹丹,胡宁,等.基于柔性印刷工艺的表面肌电电极阵列装置的设计[J].传感技术学报, 2010, 23(5):621-625.HOU W S, YANG D D, HU N, et al. Design of electrode array device for s EMG based on flexible printed technology[J]. Chinese Journal of Sensors and Actuators, 2010, 23(5):621-625.
[13]黄成君.基于高密度阵列表面肌电的肌肉肌腱单元解析及肌力估计[D].合肥:中国科学技术大学, 2017.HUANG C J. Muscle-tendon units analysis and muscle force estimation based on high density surface EMG array[D]. Hefei:University of Science and Technology of China, 2017.
[14]HERMENS H J, FRERIKS B, DISSELHORST-KLUG C, et al.Development of recommendations for sEMG sensors and sensor slacement srocedures[J]. J Electromyogr Kines, 2000, 10(5):361-374.
[15]MAROZAS V, PETRENAS A, DAUKANTAS S, et al. A comparison of conductive textile-based and silver/silver chloride gel electrodes in exercise electrocardiogram recordings[J]. J Electrocardiol, 2011, 44(2):189-194.
[16]林上耀.高密度表面肌电信号采集系统研究[D].杭州:浙江大学,2016.LIN S Y. Research of high density surface electromyography acquisition system[D]. Hangzhou:Zhejiang University, 2016.
[17]JUNG J M, CHA D Y, KIM D S, et al. Development of PDMS-based flexible dry type SEMG electrodes by micromachining technologies[J]. Appl Phys A, 2014, 116(3):1395-1401.
[18]DE LUCA C J. Surface electromyography:detection and recording[Z].Del Sys Incorporated, 2002. http://www.docin.com/p-399682614.html.
[19]乐珺,徐胤,薛卉. SEMG测量电路在外骨骼上肢康复机器人中的应用[J].机械制造与自动化, 2017, 46(2):146-149.LE J, XU Y, XUE H. Application of SEMG measuring circuit in exoskeleton upper limb rehabilitation robot[J]. Machine Building&Automation, 2017, 46(2):146-149.
[20]鲜星宇,王涛,林霖,等.便携式人体生物电传感器[J].仪表技术与传感器, 2012, 3:6-8.XIAN X Y, WANG T, LIN L, et al. Design of portable bioelectricity sensor[J]. Instrument Technique and Sensor, 2012, 3:6-8.
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