A Wearable 128-Channel Wireless Device for High-Density Surface Electromyography Recording.

Area of Science:

• Biomedical Engineering
• Wearable Technology
• Signal Processing

Background:

• High-density surface electromyography (sEMG) requires sophisticated instrumentation for accurate muscle activity measurement.
• Existing systems often face limitations in portability, data transmission, and channel count.
• Advancements in miniaturization and wireless technology are crucial for next-generation sEMG applications.

Purpose of the Study:

• To design, manufacture, and test a compact, wearable wireless micro-instrument for high-density sEMG.
• To achieve high-precision signal recording and real-time WiFi transmission of 128 sEMG channels.
• To validate the device's performance for advanced sEMG experimental data collection.

Main Methods:

• Development of a dual-board system: an analogue front end for signal conditioning and a wireless board with a CC3200 chipset.
• Integration of a 128-channel electrode grid interface for comprehensive muscle signal acquisition.
• System testing to verify signal conditioning accuracy, wireless transmission reliability, and overall operational parameters.

Main Results:

• The wearable micro-instrument achieves an input-referred noise level of 1.34 µVrms and 24-bit analog-to-digital conversion.
• The device operates wirelessly via WiFi, transmitting 128 sEMG channels with a total power consumption of 280 mA at 3.7 V.
• Testing confirmed the successful conditioning of sEMG signals and reliable wireless data transmission.

Conclusions:

• The developed wearable wireless micro-instrument effectively supports high-density sEMG data acquisition and transmission.
• The device's compact size, high precision, and wireless capabilities make it suitable for advanced sEMG research.
• This technology facilitates more complex and mobile sEMG experiments, advancing the field of human movement analysis.