DocumentCode :
380769
Title :
Miniature active concentric ring sensor for localized body surface EMG measurement
Author :
Lu, Chih-Cheng
Author_Institution :
Div. of Med. Eng. Res., Nat. Health Res. Inst., Taipei, Taiwan
Volume :
2
fYear :
2001
fDate :
2001
Firstpage :
1108
Abstract :
EMG detection is critical in gait analysis. Localized EMG detection usually calls for invasive method using needle electrode. Body surface EMG provides global information about the muscle activity of a general area. This global information is not as useful compared with the localized EMG signal. Concentric ring electrode with built-in amplifier provides superior localized EMG signal from body surface. A light weight (2 gm) miniature (15 mm in diameter 3.5 mm in thickness) active concentric ring sensor (Harbinger Technology HT-EMG, Chung-Ho City, Taipei County, Taiwan) with high input impedance (10 GΩ) is used to obtain localized EMG activity form body surface without skin preparation. The amplifier is mounted directly above the concentric ring electrode with low system noise (0.7 mV rms at gain of 1000) with a high pass filter of 15 Hz and a low pass filter at 10 kHz. The reference connection is at the back, on top of the active sensor. The high common mode rejection ratio (118 dB typical) with high input impedance and lightweight makes concentric ring EMG active sensor user-friendly and easily adaptable to most EMG acquisition system.
Keywords :
biomedical electrodes; biomedical electronics; computerised instrumentation; data acquisition; differential amplifiers; electromyography; gait analysis; preamplifiers; EMG detection; LabVIEW program; built-in amplifier; concentric ring electrodes; gait analysis; high common mode rejection ratio; high input impedance; high-pass differential amplifier; localized body surface EMG measurement; miniature active concentric ring sensor; portable notebook computer; preamplifier; self-contained compact module; signal-conditioning amplifier; user friendly portable acquisition system; Cities and towns; Electrodes; Electromyography; Low pass filters; Low-noise amplifiers; Muscles; Needles; Sensor systems; Skin; Surface impedance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE
ISSN :
1094-687X
Print_ISBN :
0-7803-7211-5
Type :
conf
DOI :
10.1109/IEMBS.2001.1020384
Filename :
1020384
Link To Document :
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