Improved "active" electrodes for recording bioelectric signals in work physiology

Area of Science:

• Biomedical Engineering
• Physiological Measurement
• Wearable Technology

Background:

• Conventional surface electrodes for bioelectric signals are highly susceptible to motion artefacts.
• This sensitivity poses challenges in physiological investigations, particularly in ergonomics and sports science.
• Existing methods often struggle to provide clean, reliable bioelectrical data during dynamic activities.

Purpose of the Study:

• To develop and evaluate an "active" electrode system designed to minimize motion artefacts.
• To compare the performance of the novel active electrodes against conventional Ag/AgCl electrodes.
• To assess the efficacy of active electrodes in reducing artefacts during electrocardiogram (ECG) and electromyogram (EMG) recordings.

Main Methods:

• Development of an "active" electrode incorporating impedance-converting amplification.
• Integration of circuit elements and power supply into a portable housing.
• Qualitative comparison of active electrodes versus conventional Ag/AgCl electrodes using simulated motion artefacts in ECG and EMG recordings.

Main Results:

• The active electrodes demonstrated a high degree of motion artefact suppression.
• Qualitative analysis confirmed superior performance compared to conventional electrodes.
• The impedance-converting amplification effectively reduced noise during physiological signal acquisition.

Conclusions:

• Active electrodes represent a significant advancement for reliable bioelectrical signal recording.
• These electrodes are particularly beneficial for applications in ergonomics and sports where motion artefacts are prevalent.
• The developed active electrode system offers a practical solution for improving the quality of physiological data.