Surface Muscle Pressure Detection Based on Air Pressure Difference Sensing and Its Application in Posture Recognition

This study proposes a method for real‐time monitoring of muscle activity applied in posture recognition by detecting changes in surface muscle pressure (SMP), a specialized form of force myography (FMG) focused on air pressure differential transduction. A monitoring system mainly consists of a pressure cuff, a spherical airbag, and a micro air pressure differential sensor. First, a physical model of the monitoring device was constructed, and a corresponding physical device was made. The device was verified and calibrated by electromyography and using an electronic digital angle ruler. Then, a real‐time data acquisition system with multiple micro pressure differential sensors was designed and manufactured. This system was integrated with the monitoring device to form a complete pressure‐based FMG posture recognition system for achieving dual‐channel high‐precision real‐time monitoring of muscle activity. The effectiveness and feasibility of the proposed method were verified through human–machine interaction experiment. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.