Abstract: A power generation system includes a generator and a rotary mechanism. The rotary mechanism includes a rotary shaft rotatably connected to the generator and at least one drive module connected with the rotary shaft. The drive module has a flow collection hood. The flow collection hood has a hood body and a flow direction control unit. The hood body defines a front opening and a rear opening and has a peripheral wall positioned between the front and rear openings. The flow direction control unit is disposed on the hood body. The flow direction control unit serves to block and interrupt a fluid flowing from the front opening to the rear opening, while permitting a fluid flowing from the rear opening to the front opening to freely flow through the hood body, whereby the drive module is drivable by the fluid to drive the rotary shaft to one-way rotate.

Abstract: A multi-layer piezoelectric center-drive ceramic transformer includes a stack of piezoelectric ceramic blanks sintered together, each piezoelectric ceramic blanks having at least one odd-number layer and at least one even-number layer alternatively sandwiched in between a top cover layer and a bottom cover layer, first and second inner electrode layers reversely printed on the at least one odd-number layer, third and fourth inner electrode layers reversely printed on the at least one even-number layer, first and second output terminal electrodes respectively printed on two distal ends of each piezoelectric ceramic blank, and first and second input terminal electrodes respectively printed on two opposite lateral sides of each piezoelectric ceramic blank, the first input terminal electrodes being respectively connected to the first inner electrode layers and the third inner electrode layers, the second input terminal electrodes being respectively connected to the second inner electrode layers and the fourth inn