Properties of Dry and Non-contact Electrodes for Wearable Physiological Sensors

Flexible noncontact electrodes for comfortable monitoring of physiological signals

“…In this study, a flexible noncontact electrode that is based on the capacitive coupling between the electrode and the skin 17,22 was proposed so that the use of conductive gels, as well as the discomfort of the patients, could be avoided. In this study, a flexible noncontact electrode that is based on the capacitive coupling between the electrode and the skin 17,22 was proposed so that the use of conductive gels, as well as the discomfort of the patients, could be avoided.…”

“…[19][20][21] The noncontact electrodes do not require the use of conductive gels or the direct contact with the skin, making them advantageous than traditional wet or dry electrodes in terms of patient comfort and ease of preparation. 17 However, to date, most of the noncontact electrodes are rigid and there are electronic components on the backside of the electrode, [22][23][24] making the electrode difficult to adapt to the local shape of the skin and the discomfort still exists when the patients wear them during sleep monitoring or sports training applications. 13 Chi et al proposed a simple capacitive noncontact electrode that contains an onboard amplifier, filter, and buffer and connects to the wireless base unit.…”

Towards Noise-Enhanced Augmented Cognition

“…In-depth measurements of dry electrode performance have been presented [6], [20], [21] but most studies only report a correlation coefficient between EEG recorded at nearby locations with wet and dry electrodes. Typical values reported are: >0.93 [3]; 0.89 [22]; 0.83 [23]; 0.81-0.98 [15]; 0.68-0.90 [16]; 0.39-0.85 [24].…”

Desenvolvimento E Avaliação De Eletrodos Metálicos Passivos Para Eletromiografia De Superfície

“…[8]. O maior esforço está em otimizar o circuito, sendo poucos estudos focados na influência do material na qualidade do sensor, embora a interface do eletrodo/pele seja o real fator limitante para os sistemas com eletrodos ativos [9]. Além disso, a literatura relacionada ao desenvolvimento desses eletrodos está focada em aplicações com eletrocardiografia (ECG) e eletroencefalograma (EEG), não levando em conta características específicas dos sinais de EMG [1], dentre eles [10]:…”