A Multifunctional Self‐Powered Monitoring System for Diver's Respiration and Motion

ABSTRACT Diving is critical for maritime operations but poses severe physiological risks to divers in cold, high‐pressure underwater environments. Continuous monitoring of diver's vital signs, particularly respiration, is essential for safety but remains challenging due to seawater interference and the limitations of existing devices. Here, we present a multifunctional self‐powered monitoring system (MSM system) based on flexible triboelectric sensors that achieves real‐time measurement of a diver's respiratory rate and breathing depth underwater, while simultaneously tracking body motion. The system integrates lightweight wearable sensors, a portable signal‐processing module and a deep‐learning analysis terminal. By analyzing multichannel respiratory and motion data, the MSM system is capable of providing a comprehensive assessment of the diver's physiological status. During the training process, the provision of real‐time feedback facilitates the immediate adjustment of breathing and movement patterns, thereby enhancing both the safety of the training and its efficacy. Furthermore, in the event of danger during underwater operations, the system provides immediate warning, thus enhancing the safety of the diver. Underwater experiments demonstrate the system's robust performance in capturing respiratory patterns and motion. This MSM system offers a novel and practical approach to diver safety monitoring and personalized training.