An integrated self-sustainable power supply includes a piezoelectric energy harvesting (PEH) beam, a power management unit (PMU) circuit located on the PEH beam, a rechargeable battery located on the PEH beam, and a positive regulated power supply output and a negative regulated power supply output. The PMU circuit includes electrical inputs/outputs. The rechargeable battery includes a negative access pad and a positive access pad, which are in electrical communication with the electrical inputs/outputs of the PMU circuit. The positive regulated power supply output and the negative regulated power supply output are also in electrical communication with the electrical inputs/outputs of the PMU circuit.

Smart dental implant systems and methods for ambulatory dental care are provided. In some embodiments, the disclosed subject matter includes a crown, adapted to mimic a patient's anatomy and location of the smart dental implant system. The crown can include piezoelectric nanoparticles, disposed on a surface of the crown and adapted to generate electricity from a patient's oral motion. In some embodiments, the disclosed subject matter includes an abutment, coupled to the crown. The abutment can include an energy harvesting circuit, operationally coupled to the piezoelectric nanoparticles and adapted to harvest the electricity, and a micro LED array, operationally coupled to the energy harvesting circuit and adapted to photobiomodulate surrounding peri-implant soft tissue.

A structure displacement self-powered sensor based on the post-buckling piezoelectric effect comprising an upper unit, a lower unit, a traction system and an information transmission system. The upper unit is slidably connected with the lower unit; the upper unit includes an upper deformable plate and an upper piezoelectric film bonded to the upper deformable plate; the lower unit comprises a lower deformable plate and a lower piezoelectric film bonded to the lower deformable plate; when the upper deformable plate and the lower deformable plate are deformed, a voltage signal is generated and transmitted to the information transmission system through the data acquisition unit. The present disclosure can monitor the settlement of the pier or the expansion or contraction in the expansion gap of the structure by monitoring the output voltage of the equipment. The present disclosure is self-powered and can work for a long time, normally with minimal maintenance.

A deployable wave energy harvesting device for autonomous underwater vehicles (AUVs) includes a deployable lifting platform and an energy harvesting mechanism. The deployable lifting platform includes two scissor-type lifting structures, which are supported by a double-end threaded rod. A first stepper motor is connected to a threaded rod passing through a threaded hole at a center of a slotted pin shaft, and drives the threaded rod to lift and lower the deployable lifting platform. A spindle on the energy harvesting mechanism is connected to a generator. A support frame is hung at the end of the spindle. A scissor-type single-pendulum structure is hung at the lower end of the support frame. A load is hung on the end of the scissor-type single-pendulum structure. Second and third stepper motors are installed on the support frame to lift and lower the load by rope drive.

Aspects of the present disclosure describe systems, methods, and structures that scavenge mechanical energy to provide electrical energy to a wearable, where the mechanical energy is scavenged by a bending-strain-based transducer that includes a non-resonant energy harvester. By employing a non-resonant energy harvester that operates in bending mode, more electrical energy can be generated that possible with prior-art energy harvesters. In some embodiments, the output of a bending-strain-based transducer element is used for both energy scavenging and as a sensor signal indicative of a user parameter, such as a step, respiration rate, heart rate, weight and the like. In some embodiments, a transducer element includes a plurality of piezoelectric layers that are electrically connected in parallel to increase the energy and/or power provided by the transducer element.

The present disclosure is directed to an engine component for a gas turbine engine, the engine component including a substrate that includes a composite fiber and defines a surface. An energy harvesting fiber is positioned within the substrate.

A nonlinear magnetic force-based arched piezoelectric ceramic energy harvesting deceleration strip, which comprises an outer case and an internal generating mechanism. The outer case structure comprises an upper deceleration strip and a casing. The casing is embedded in the pavement structure by excavating the upper part of surface course. A rebounding mechanism is located between the upper deceleration strip and casing to restore the pressed upper deceleration strip. Features: the generating mechanism comprises a rack, a gear set and generating discs. The rack is disposed at the bottom of the upper deceleration strip and moving up and down therewith. The rack can drive the gear set to generate acceleration, and the transmission shafts drive the left and right generating discs to rotate. The gear set is combined with three transmission shafts.

Disclosed is an energy mixer having a first active diode coupled between a first input node and an output node, and a second active diode coupled between a second input node and the output node. A first capacitor is coupled between the first input node and a dynamic node, and a second capacitor is coupled between the second input node and a third node. Switching circuitry is configured to selectively couple the dynamic node between a fixed voltage node and the second input node in response to a control signal provided by control circuitry. When an output voltage at the output node is within a first range, the dynamic node is coupled to the fixed voltage node and when the output voltage is within a lower voltage second range, the dynamic node is coupled to the second input node such that first capacitor and second capacitor are coupled in series.

A high voltage pulse generating system has a latching element coupled in between a ferroelectric generator (FEG) and a load, such as a vector inversion generator. Such a latching element prevents the return of current to the FEG when the FEG undergoes mechanical destruction after depolarization, thereby increasing the useful amount of energy extracted from the FEG. In some embodiments, multiple FEGs are configured with multiple latching elements to deliver multiple high-voltage, high-current pulses.

A piezoelectric system includes a piezoelectric resonator comprising a piezoelectric element and a pair of electrodes configured to transmit signals emitted by the piezoelectric element and generated by a deformation of the piezoelectric element; a detector configured to detect at least two signals of the signals generated by the deformation of the piezoelectric element, the at least two signals being detected at different instants; a control unit configured to compare the at least two signals and, on the basis of the comparison, determine a complex active impedance value as a function of a predetermined law; an active impedance unit configured to generate an active impedance based on the complex active impedance value determined by the control unit, the active impedance being connected to the pair of electrodes.