Waterproof magnetic coupling composite pipeline energy collection device and self-energy-supply pipeline leakage monitoring method

The invention relates to a waterproof magnetic coupling composite pipeline energy collection device and a self-energy-supply pipeline leakage monitoring method. The device comprises a pipeline energy collection unit, and the pipeline energy collection unit comprises a rotating assembly, a power generation assembly and a mounting assembly; the rotating assembly comprises a rotating blade disc, an excitation magnet and a magnet mounting plate, and the excitation magnet is embedded in the rotating blade disc and is pressed and positioned through the magnet mounting plate; the power generation assembly comprises a buckling beam, a pressing block, an integrated buckling frame, an excited magnet, a copper electrode, an electronic electret plate, a coil and piezoelectric patches, the piezoelectric patches are symmetrically installed at the two ends of the buckling beam, the coil is arranged on the inner side of the center of the integrated buckling frame, the piezoelectric patches generate power due to the piezoelec