biostudies-literatureZheng XKey Research and Development Program of Ministry of Science and Technology of ChinaYoung Talent Fund of Association for Science and Technology in ShaanxifundRefName="National Natural Science Foundation of China" funderDoi="10.13039/501100001809">National Natural Science Foundation of ChinaKey Research and Development Program of Hubei Provincee08149https://www.ebi.ac.uk/biostudies/studies/S-EPMC12463033biostudies-literatureUnknown12(36)The magneto-mechano-electric (MME) coupling principle plays an important role in synchronously harvesting magnetic energy and monitoring safe operation in the distribution grid and the Power Internet of Things (PIoT). In this study, an MME resonator is presented, containing two crossed U-fingers made of piezoelectric phase-elastic beams with different lengths and magnet masses, operating in symmetric, decoupling dual bending modes. One U-finger resonating at 50 Hz serves as energy harvester (EH), while the other resonating at 185 Hz acts as current or magnetic sensor, enabling the resonator to simultaneously and wirelessly capture 50 Hz stray magnetic field (H_AC _,50 Hz) energy and ground fault message of power lines by injecting an additional non-grid-frequency (185 HAdvanced science (Weinheim, Baden-Wurttemberg, Germany)A Self-Powered Double U-Finger MME Resonator Capable of Wirelessly Capturing Abnormal Message in Smart Grid Networks.PMC12463033524021562022YFB3205700202304192021BAA214Peng HZheng XPeng WWang BLv XLei YFang SChang JDong SCheng ZYu YfalseA Self-Powered Double U-Finger MME Resonator Capable of Wirelessly Capturing Abnormal Message in Smart Grid Networks.The magneto-mechano-electric (MME) coupling principle plays an important role in synchronously harvesting magnetic energy and monitoring safe operation in the distribution grid and the Power Internet of Things (PIoT). In this study, an MME resonator is presented, containing two crossed U-fingers made of piezoelectric phase-elastic beams with different lengths and magnet masses, operating in symmetric, decoupling dual bending modes. One U-finger resonating at 50 Hz serves as energy harvester (EH), while the other resonating at 185 Hz acts as current or magnetic sensor, enabling the resonator to simultaneously and wirelessly capture 50 Hz stray magnetic field (H_AC _,50 Hz) energy and ground fault message of power lines by injecting an additional non-grid-frequency (185 H2025-01-01T00:00:00Z2025 Sep2026-06-03T20:16:37.391Z2026-05-30T03:07:08.429ZS-EPMC124630334064129410.1002/advs.202508149