Please use this identifier to cite or link to this item: https://doi.org/10.3390/s110605819
Title: Design, fabrication and experimental validation of a novel dry-contact sensor for measuring electroencephalography signals without skin preparation
Authors: Liao, L.-D 
Wang, I
Chen, S.-F
Chang, J.-Y
Lin, C.-T
Keywords: article
computer program
electric conductivity
electrode
electroencephalography
equipment design
gel
hair
human
impedance
instrumentation
methodology
pathology
reproducibility
scalp
signal processing
skin
wettability
Electric Conductivity
Electric Impedance
Electrodes
Electroencephalography
Equipment Design
Gels
Hair
Humans
Reproducibility of Results
Scalp
Signal Processing, Computer-Assisted
Skin
Software
Wettability
Issue Date: 2011
Citation: Liao, L.-D, Wang, I, Chen, S.-F, Chang, J.-Y, Lin, C.-T (2011). Design, fabrication and experimental validation of a novel dry-contact sensor for measuring electroencephalography signals without skin preparation. Sensors 11 (6) : 5819-5834. ScholarBank@NUS Repository. https://doi.org/10.3390/s110605819
Rights: Attribution 4.0 International
Abstract: In the present study, novel dry-contact sensors for measuring electro-encephalography (EEG) signals without any skin preparation are designed, fabricated by an injection molding manufacturing process and experimentally validated. Conventional wet electrodes are commonly used to measure EEG signals; they provide excellent EEG signals subject to proper skin preparation and conductive gel application. However, a series of skin preparation procedures for applying the wet electrodes is always required and usually creates trouble for users. To overcome these drawbacks, novel dry-contact EEG sensors were proposed for potential operation in the presence or absence of hair and without any skin preparation or conductive gel usage. The dry EEG sensors were designed to contact the scalp surface with 17 spring contact probes. Each probe was designed to include a probe head, plunger, spring, and barrel. The 17 probes were inserted into a flexible substrate using a one-time forming process via an established injection molding procedure. With these 17 spring contact probes, the flexible substrate allows for high geometric conformity between the sensor and the irregular scalp surface to maintain low skin-sensor interface impedance. Additionally, the flexible substrate also initiates a sensor buffer effect, eliminating pain when force is applied. The proposed dry EEG sensor was reliable in measuring EEG signals without any skin preparation or conductive gel usage, as compared with the conventional wet electrodes. © 2011 by the authors; licensee MDPI, Basel, Switzerland.
Source Title: Sensors
URI: https://scholarbank.nus.edu.sg/handle/10635/180858
ISSN: 1424-8220
DOI: 10.3390/s110605819
Rights: Attribution 4.0 International
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