82 results about "Electromagnetic energy harvesting" patented technology

Antennas developed for electromagnetic field energy harvesting, typically referred to as rectennas, provide an alternative electromagnetic field energy harvesting means to photovoltaic cells if designed for operation in the visible frequency spectrum. Rectennas also provide energy harvesting ability or power transfer mechanism at microwave, millimeter and terahertz frequencies. However, the power harvesting efficiency of available rectennas is low because rectennas employ traditional antennas whose dimensions is typically proportional or close to the wavelength of operation. This invention provides a device for electromagnetic field energy harvesting that employs a plurality of electrically-small resonators such as split-ring resonators that provide significantly enhanced energy harvesting or energy collection efficiency while occupying smaller footprint. The invention is applicable to electromagnetic energy harvesting and to wireless power transfer.

This invention provides a unique Solar/Electromagnetic Energy Cell, Solar/Electromagnetic Energy Collector which can be used to harness solar energy, Solar Lamp which provides light from the output provided by Energy Collector/Cell, Solar Heating Element which can provide energy for cooking food, water heater, room heater or any heating application.

Disclosed in the invention is an energy-harvesting-circuit-based piezoelectric-electromagnetic composite energy harvesting device. The invention relates to a piezoelectric-electromagnetic composite energy harvesting device capable of improving an output power, which belongs to the technical field of the new energy and power generation. The piezoelectric-electromagnetic composite energy harvesting device comprises a piezoelectric-electromagnetic composite energy harvesting device body and an energy collection circuit. The piezoelectric-electromagnetic composite energy harvesting device body consists of a housing, a coil, an upper permanent magnet, a piezoelectric ceramic material, a foundation beam, a tapered permanent magnet, a lower permanent magnet, an upper electrode, a piezoelectric plate, a lower electrode, a left piezoelectric plate upper electrode lead, a right piezoelectric plate upper electrode lead. The energy collection circuit includes an electromagnetic energy harvesting device energy collection circuit, a piezoelectric energy harvesting device energy collection circuit, and a charging circuit for realizing composite charging and preventing current returning. According to the invention, conversion from an alternating current to a direct current is realized; the output power supply is improved for a load. The energy harvesting device has advantages of green and pollution-free effects, high energy density, shortened charging time, high reliability, high environment adaptability, convenient operation control, and low maintenance cost and the like.

The invention discloses a three-frequency polarization insensitive electromagnetic energy collection structure unit and a collection surface. The collection structure unit comprises four identical-structure rectangular resonance rings having openings at bottom edges, centers of top edges of the rectangular resonance rings are provided with circular through holes, one side edge of each rectangular resonance ring is connected with a bottom edge of the adjacent rectangular resonance ring, and an end-to-end rectangular resonance ring structure is formed. The collection surface comprises a metal structure layer, a medium substrate, a ground metal layer and a matching resistance array, wherein the metal structure layer comprises more than one collection structure unit, the medium substrate is provided with through holes in matching with the circular through holes respectively, the matching resistance array comprises more than one resistor, each resistor is respectively arranged in one through hole, one end of the resistor is connected with an edge of the circular through hole, and the other end is connected with the metal layer. According to the collection structure unit and the collection surface, a purpose that resonance absorption is generated at three frequency bands is realized, polarization insensitive characteristic is realized, the collection structure unit is applicable to application under the complex electromagnetic environment, the structure is stable and solid, cost is low, and the collection structure unit is suitable for large-scale production.

An electromagnetic energy collecting device for a smart power grid comprises a strip-shaped magnetic core, wherein magnetic collecting plates are fixedly connected to the two ends of the magnetic core, the sectional area of each magnetic collecting plate is larger than that of the magnetic core, and a coil is wound around the magnetic core. A stable power supply system for the smart power grid comprises the electromagnetic energy collecting device, a storage module and an output module, wherein the storage module is electrically connected with the electromagnetic energy collection device and is used for storing the electric energy collected by the electromagnetic energy collection device; and the output module is electrically connected with the storage module and is used for outputting the electric energy stored in the storage module to a load device. The provided electromagnetic energy collection device and the provided stable power supply system for the smart power grid can efficiently collect electromagnetic energy near a power transmission line, supply power to monitoring equipment such as a sensor and ensure stable operation of the smart power grid.

An electromagnetic energy collector includes a planar waveguide formed of multiple material layers having at least two different dielectric constants. Mirrors formed within the waveguide core. Metal-insulator-metal (MIM) detectors are aligned with the mirrors, and disposed below the bottom surface of the waveguide. The mirrors may be etched at an angle into the waveguide. In some arrangements, wherein a plurality of MIM detectors are disposed in a column or 3D array beneath each mirror. A wavelength range of the MIM detectors disposed closer to a respective mirror is lower than a wavelength range of a MIM detector disposed farther away from the same mirror.

The invention discloses an electromagnetic energy collector based on a metasurface. The electromagnetic energy collector comprises an upper metal layer, a lower metal layer, metal through holes and adielectric layer located between the upper metal layer and the lower metal layer. The upper metal layer comprises four identical U-shaped groove square patches, and the four identical U-shaped groovesquare patches are rotationally symmetrical; a circular hole is formed in the lower metal layer, and the position of the circular hole coincides with the central position of the U-shaped groove squarepatches; each metal through hole is formed in the geometric center of one U-shaped groove square patch, penetrates through the dielectric layer and is perpendicular to the lower metal layer; and a resistor is connected between the bottom end of the metal through hole and the lower metal layer. The electromagnetic energy collector has very good energy absorption capability, unclear polarization and angle stability at 5.8 GHz, and can be used for microwave energy transmission and collection of environmental electromagnetic waves in a complex electronic environment.

The invention discloses a composite vibration energy collector with a conical cavity beam. The composite vibration energy collector comprises an outer frame, an electromagnetic energy collecting unitand a composite beam. The electromagnetic energy collection unit comprises a coil and a magnet vibrator. The composite beam comprises a sub-cantilever beam, a conical cavity beam, a connecting piece,a conical cavity piezoelectric patch and a sub-cantilever beam piezoelectric patch. The short end of the conical cavity beam is fixed on the outer frame, the long end of the conical cavity beam is connected with one end of the sub-cantilever beam through a connecting piece, the other end of the sub-cantilever beam is fixedly provided with the magnet vibrator, the conical cavity beam is provided with the conical cavity piezoelectric patch, the sub-cantilever beam is provided with the sub-cantilever beam piezoelectric patch, and the coil is concentric with the magnet vibrator and is arranged onthe outer frame. The two beams which are different in resonant frequency but close to each other are coupled through the connecting piece, the bandwidth is increased, the output of piezoelectric voltage is improved through the design of the conical cavity beam, meanwhile, the magnet vibrator is used for being matched with the inherent frequency of a target system, and the collection efficiency isimproved.

The application discloses an electrostatic-piezoelectric-electromagnetic composite energy harvester, which includes a piezoelectric energy harvesting unit, an electromagnetic energy harvesting unit and an electrostatic energy harvesting unit. The electrostatic energy harvesting unit is used for generating electric energy by vibrating an upper electrode relative to a lower electrode under the trigger of high-frequency vibration generated by the surrounding environment. The energy harvester can harvest electrostatic, electromagnetic and piezoelectric energy at the same time. The electrostatic, piezoelectric and electromagnetic energy harvesting units are optimized. Compared with an energy harvester with a single or two energy harvesting modes, the energy acquisition efficiency and output power of the energy harvester in various environments are greatly improved.

The invention discloses an electromagnetic energy collection structure integrating a surface plasmon coupler and a planar semi-Maxwell fisheye lens, comprising a dielectric substrate, a micro-strip line, a half-Maxwell fisheye lens body, and a super surface. The phase of the super surface changes gradually. The semi-Maxwell fisheye lens body is of a surface metal structure, more than one square metal patch is periodically distributed in rows and columns into a semi-circular shape, and the sizes of the square metal patches decrease gradually from the center to the periphery. The super surface is composed of H-shaped structure units periodically distributed in rows and columns, and the sizes of the H-shaped structure units decrease gradually from a side close to the semi-Maxwell fisheye lens to a side away from the semi-Maxwell fisheye lens. Spatial electromagnetic wave can be effectively converted into surface wave and energy can be concentrated, so that efficient energy collection is realized. The electromagnetic energy collection structure has a good application prospect in such fields as the Internet of things, radio frequency identification (RFID), wireless sensor network (WSN) and energy collection and recovery.

A soft magnetic layer for a receiving antenna of a wireless power receiving apparatus includes a first soft magnetic member containing a Mn—Zn ferrite material, and a second soft magnetic member containing a Ni—Zn ferrite material. Accordingly, electromagnetic energy collecting performance of the receiving antenna of the wireless power receiving apparatus is improved, and thereby power transmission efficiency is maximized.

The invention discloses a preparation process of a wireless temperature sensor utilizing electromagnetic self-energizing. The wireless temperature sensor includes a wireless temperature sensor body, an alloy band and an alloy band fixing structure, wherein the wireless temperature sensor body includes an upper cover, a lower cover, a shielding board and a PCB, two side walls of the upper cover areprovided with through grooves communicating with each other, an inner wall of the upper cover is provided with an upper cover slot, the lower cover is circumferentially provided with a pin matched with the upper slot, and the PCB is provided with an electronic component. The preparation process includes steps of coil framework winding, electronic component welding, assembling, glue injection andtesting. The preparation process is advantaged in that super-low power consumption and micro electromagnetic energy collection are achieved, cells and radio frequency communication are not needed, advantages of environmental friendliness, free maintenance, electrical complete isolation, convenient mounting, strong anti-interference capability, reliable work and small volume are further achieved, atemperature measurement problem in a high voltage state can be well solved, the acquired temperature can be transmitted to a monitoring terminal in real time through radio frequency communication, and intermittent and accurate measurement is achieved.