Square column rear-mounted separation flat plate combined type fluid energy harvesting system

The invention relates to a square column rear-mounted separation flat plate combined type fluid energy harvesting system which comprises a square column and further comprises a rigid flat plate which is installed at the designed distance behind the square column and is uniform in thickness, and the two sides of the rigid flat plate are connected with the square column through long and thin rod pieces and used for improving the vortex-induced vibration amplitude of the square column. The energy harvesting device further comprises an energy harvesting device body installed on the square column and used for converting vibration energy of the square column into electric energy. The separated rigid flat plate is arranged behind the square column, so that eddy current motion in a frequency locking interval can be remarkably enhanced, the vibration intensity amplitude of the system is improved, and the energy harvesting efficiency is improved; in addition, according to the change of the application requirement of th