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The financial investment required for commercial biomechanical analysis systems often acts as a barrier to their accessibility. In this study, we developed an affordable system for the simultaneous acquisition of three key biomechanical parameters. Built around a Raspberry Pi 4, it measures the Center of Pressure (CoP) with a custom force plate, calculates pelvic obliquity using a MediaPipe-based photogrammetry module, and quantifies muscle activation by filtering the surface EMG (sEMG) signal from the abdominal muscles. Functional tests demonstrated synchronous data capture across modalities. In our evaluation, sEMG was sampled at ~ 100 Hz, photogrammetry processed ~ 2 frames/s at 640 × 480 px, and the force plate supported loads exceeding 100 kg.

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Design of a System for the Real-Time Acquisition of Center of Pressure, Joint Angle, and Abdominal EMG

  • 会议论文

  • 发表日期：

    2026年

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  • Alvarez Padilla Francisco Javier,
  • Hernandez Gomez Oscar Ivan,
  • Quintero Valdez Jose Rodrigo,
  • Velasco Lopez Jose Carlos

摘要

The financial investment required for commercial biomechanical analysis systems often acts as a barrier to their accessibility. In this study, we developed an affordable system for the simultaneous acquisition of three key biomechanical parameters. Built around a Raspberry Pi 4, it measures the Center of Pressure (CoP) with a custom force plate, calculates pelvic obliquity using a MediaPipe-based photogrammetry module, and quantifies muscle activation by filtering the surface EMG (sEMG) signal from the abdominal muscles. Functional tests demonstrated synchronous data capture across modalities. In our evaluation, sEMG was sampled at ~ 100 Hz, photogrammetry processed ~ 2 frames/s at 640 × 480 px, and the force plate supported loads exceeding 100 kg.