The present invention belongs to the field of energy harvesting, and in particular relates to an ocean wave energy collector based on magnetic force and triboelectric effect. The ocean wave energy collector includes a plurality of protective shells connected by flexible metal spring modules; a magnetic oscillation system is installed in each protective shell in a matched mode and includes an electric energy output module and a plurality of magnetic oscillators, and each magnetic oscillator includes a first supporting body, a dielectric capsule, first magnet units, second magnet units, a supporting shell, and an electrode unit.

Devices and methods are provided for harvesting kinetic energy. The devices can include a plurality of dielectric elastomeric membranes, a rigid connector rod, and a mountable support base. Membrane layers have a funnel-shape with a narrow opening portion and a wide perimeter portion. Membrane layers are adjacent to other membrane layers having an opposite orientation defined by the narrow opening portion and the wide perimeter portion. The narrow opening portions are coupled to a first end portion of the connector rod. The wide perimeter portions are fixed in relation to the support base. Application of linear force at a second end portion of the connector rod in a first direction causes at least a first membrane layer to stretch. Application of the force in a second direction opposite to the first direction causes at least a second membrane layer adjacent to the first membrane layer to stretch.

An apparatus for converting wave energy into electrical energy including a float element excited at a defined frequency by the waves. A power extraction system collaborates with the float element to convert mechanical energy into electrical energy, the mechanical energy coming from the movement of the float element excited by the waves. The power extraction system takes the form of a frequency amplifier made up of at least two piezoelectric motors each composed of at least one piezoelectric post excited at a frequency higher than that of the float, and a member for activating said piezoelectric motors acting on the piezoelectric motors so as to squash said piezoelectric posts. Each piezoelectric motor has a mechanical amplification device connected to rollers and includes a) jaws able to apply mechanical stress to the posts, b) a lever acting on the jaws with a proximal end connected to said jaws and a distal end connected to a roller in contact with the member so as to activate said piezoelectric motor.

A fluid control device (1) includes a case (21) including a case top plate, a case side plate, and a case bottom plate and having an internal space (59) and a cavity, a pump (11) provided at a position at which the pump (11) divides the internal space (59) into a bottom-plate-side region and a top-plate-side region, the pump (11) being configured to generate a flow of a fluid between the bottom-plate-side region and the top-plate-side region and control the flow direction of the fluid, and a fixing member (31) that fixes the case (21) in place. The case (21) is mounted on the fixing member (31) by using the case top plate or the case bottom plate as a mounting surface (B).

Wind turbine consisting of an anchoring to the ground or to a base and a mast, the natural oscillation frequency of which is purposely adjusted to the frequency of appearance of the air vortices or eddies produced after the collision of a laminar and stationary airflow against the surface thereof. The aeroelastic energy thus absorbed is converted into electrical energy due to the use of materials with high electromechanical coupling.