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.

An apparatus, method, and system to harvest and store electromagnetic energy is disclosed. The present invention uses, for example, conductive surfaces within the energy storage component itself as a means of electromagnetic energy collection. The surface may be an integral portion of the energy device, such as a charge collection surface within a battery or a capacitor that mainly provides the battery or a capacitor with a necessary function. In another embodiment of the invention a metallic or conductive surface is added to and specifically built into the energy device during manufacturing for the main purpose of collecting electromagnetic energy for the energy device but is otherwise not necessary for the energy storage component. Once the energy is collected, it can be rectified either via rectification components that were built directly into the energy storage component during its manufacture or connected external to the energy storage component but within the energy device. The so-designed energy device may represent a self-sustaining, autonomous electromagnetic energy harvesting—energy storage device.

An apparatus, method, and system to harvest and store electromagnetic energy is disclosed. The present invention uses, for example, conductive surfaces within the energy storage component itself as a means of electromagnetic energy collection. The surface may be an integral portion of the energy device, such as a charge collection surface within a battery or a capacitor that mainly provides the battery or a capacitor with a necessary function. In another embodiment of the invention a metallic or conductive surface is added to and specifically built into the energy device during manufacturing for the main purpose of collecting electromagnetic energy for the energy device but is otherwise not necessary for the energy storage component. Once the energy is collected, it can be rectified either via rectification components that were built directly into the energy storage component during its manufacture or connected external to the energy storage component but within the energy device. The so-designed energy device may represent a self-sustaining, autonomous electromagnetic energy harvesting—energy storage device.

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.

The invention relates to a piezoelectric and electromagnetic hybrid variable-frequency micro-power generation assembly and a method for the same. The piezoelectric and electromagnetic hybrid variable-frequency micro-power generation assembly and the method are mainly used for collecting energy of a vibration environment. The piezoelectric and electromagnetic hybrid variable-frequency micro-power generation assembly comprises piezoelectric vibrators, a permanent magnet, coils, support plates, a fixed slider, a side beam and a movable slider. The piezoelectric vibrators vibrate so that piezoelectric energy can be collected; and electromagnetic energy is collected by means of changing the magnetic flux of each coil. The sliders move on the side beam, so that the span of a system is changed, the purpose of adjusting the resonant frequency of the assembly in a wide-range and high-precision manner is achieved, and the micro-power generation assembly is applicable to different working environments within a wide frequency range. Besides, the piezoelectric and electromagnetic hybrid variable-frequency micro-power generation assembly can be combined with a sensor applied to movement sensing, and has self-powered monitoring ability.

The invention discloses an electromagnetic energy harvesting system based on a passive suspension. The electromagnetic energy harvesting system consists of a hydraulic absorber, a speed amplifying mechanism and an electromagnetic energy harvesting mechanism. The speed amplifying mechanism is disposed between the hydraulic absorber and the electromagnetic energy harvesting mechanism and used for amplifying a vibration speed of a suspension. The vibration energy of the suspension is converted into electric energy to be stored. When a car runs on an uneven pavement, the vibration of the pavement is transferred to a car suspension by virtue of a tire to cause the up-down vibration of a car hydraulic absorber, and the vibration speed of the suspension is transferred to the electromagnetic energy harvesting mechanism by virtue of the speed amplifying mechanism, so that an intermediate rod of the electromagnetic energy harvesting mechanism and an inner drum make relative movement, an induction electromotive force is generated according to an electromagnetic induction principle, and the induction electromotive force is finally stored. Meanwhile, due to the existence of an Ampere force, the vibration absorption effect of the system is further improved. By adopting the structure, a complicated feedback system, a control system and additional power elements are not needed, so that the electromagnetic energy harvesting system is simple in structure, low in cost, wide in application range and relatively good in application prospect.

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 an electromagnetic energy collecting and storage and power supply device based on a broadband wave absorber. The electromagnetic energy collecting and storage and power supply device comprises an electromagnetic energy receiving and feed network module, a circuit impedance matching and filtering module, a rectifying module, a self-power DC-DC (direct current-direct current) boosting module and an energy storage module, wherein the output end of the electromagnetic energy receiving and feed network module is connected with the input end of the circuit impedance matching and filtering module; the output end of the circuit impedance matching and filtering module is connected with the input end of the rectifying module; the output end of the rectifying module is connected with the self-power DC-DC boosting module; the output end of the boosting module is connected with the power source input end of the energy storage module; the electromagnetic energy receiving and feed network module comprises the broadband wave absorber. The electromagnetic energy collecting and storage and power supply device has the advantages that the electric energy which is converted from the space electromagnetic wave and is received by a broadband electromagnetic energy receiver with high absorbing efficiency is rectified and filtered to be changed from alternating current into direct current, and then the electric energy is stored into the energy storage device (supercapacitor); a passive energy storage device which can work for a long time is provided.

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.

The invention discloses a surface plasmon coupler based electromagnetic energy collecting apparatus. The electromagnetic energy collecting apparatus comprises a dielectric substrate, and a microstrip line and a super surface which are arranged on the upper surface of the dielectric substrate, wherein the super surface is formed by more than one longitudinally-distributed super surface unit with gradient refractive indexes and the same structure; the refractive indexes are decreased in a gradient manner from a direction close to the microstrip line to a direction far from the microstrip line; and the microstrip line is formed by more than one groove-curving metal band. According to the electromagnetic energy collecting apparatus, the efficient coupling of space propagation waves and surface plasmon is realized; the energy of the surface waves is reinforced through superposition of the same-phase surface waves, and the power density of the incident space electromagnetic waves is increased; the same-phase convergence of the surface waves can be reinforced by using multiple groove-curving microstrip lines; an converging effect on the space weak electromagnetic energy is realized; the power density of the incident space electromagnetic waves is increased; and the input power of a rectifying circuit is further increased, so that the rectifying efficiency of the overall system is improved consequently.

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 and sensor use enhanced fields to emit electrons for energy collection. The collector and sensor collect energy from visible light, infrared radiation and ultraviolet electromagnetic radiation. The collector and sensor include a waveguide with a geometry selected to enhance the electric field along a conductor to create a high, localized electric field, which causes electron emission across a gap to a return plane.

The invention discloses an electromagnetic piezoelectric composite type vibration energy conversion circuit which comprises a piezoelectric energy collection rectification circuit (1), an electromagnetic energy collection rectification circuit (2), an energy storage circuit (3) and a voltage regulating circuit (4). The above four circuits are connected according to an electrical circuit mode to form the electromagnetic piezoelectric composite type vibration energy conversion circuit. The rectification circuits (1) (2) are used for converting alternating current outputted by electromagnetic and piezoelectric power generation bodies into direct current, two parts of electrical energy are stored in the energy storage circuit (3), and needed voltage is outputted after the conditioning voltage transformation of the voltage regulating circuit (4). According to the electromagnetic piezoelectric composite type vibration energy conversion circuit, the electromagnetic and piezoelectric energy collection modes are integrated, two types of energy are integrated to share the voltage regulating circuit, the complex degree of the circuit is low, the output power is greatly raised, and the efficiency of electrical energy conversion is improved.

An electromagnetic energy collecting and sensing device is described. The device uses enhanced fields to emit electrons for energy collection. The device is configured to collect energy from visible light, infrared radiation and ultraviolet electromagnetic radiation. The device includes a waveguide with a geometry selected to enhance the electric field along a conductor to create a high, localized electric field, which causes electron emission across a gap to an electron return plane.

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 a wearable piezoelectric electromagnetic composite energy harvesting vibration device. An adopted composite beam obtains larger stress distribution and a larger stress value, and a piezoelectric film is adopted as a piezoelectric material of the composite beam and larger deformation can be borne such that more electric energy is generated; a cylindrical permanent magnet isfixed at a tail end of the composite beam and can be used as a mass block such that the resonant frequency of the composite beam can be reduced, and the adaptability of the composite beam to a low-frequency environment is higher; the permanent magnet can also be used as an electromagnetic energy harvesting oscillator to generate an electromagnetic energy harvesting effect together with a coil; dueto the coupling effect of piezoelectricity and electromagnetism, the defects that the output current of a piezoelectric device is small and the output voltage of an electromagnetic device is small are overcome, the output voltage is high, and the current is large.

A rectifier comprising a metal-insulator-metal (MIM) structure. The insulator may be a native oxide with an adjacent layer of graphene. In one implementation, the rectifier is used in an electromagnetic energy collector consisting of a planar waveguide formed of multiple material layers having at least two different dielectric constants. MIM rectifiers are aligned with mirrors are formed within the waveguide core. In some arrangements, a plurality of MIM rectifiers are disposed in a column or 3D array beneath each mirror.

The invention relates to the technical field of high-pressure temperature monitoring equipment, and discloses a wireless temperature sensor. The sensor comprises a housing and a PCB installed in the housing, through grooves which are communicated are formed in the two sides of the housing, the PCB is provided with an energy collecting unit, a rectifying circuit, a voltage-stabilizing protecting module and a main control IC chip, the main control IC chip is internally provided with a micro control unit and an RF radio frequency processing unit; the energy collecting unit comprises a coil skeleton, the coil skeleton is fixedly installed on the PCB, and alloy belts penetrate through the through grooves and the coil skeleton. The wireless temperature sensor has the advantages that the power consumption is ultra low, the installing is convenient, the anti-interference capability is high, the working is reliable, the size is small, the problem of temperature measuring in a high-voltage statecan be well solved, the collected temperature in real time is transmitted to a monitoring terminal, and therefore intermittent data transmission and accurate measuring are achieved.

The invention relates to an induction type power taking method used for a three-core cable, and belongs to the technical field of an electromagnetic energy harvesting method. According to a technicalscheme, (1) coils c1, c2 and c3 are mounted in three magnetic field extreme point positions of the same cross section of the surface of the three-core cable respectively, wherein the three coils are uniformly wound around two semicircular bracelet ring-shaped frameworks with a mutual difference value angle of 120 degrees in space, and it is ensured that the three coils are aligned to A, B and C phases of core wires of the cable respectively; (2) the voltages generated by induction of the three coils c1, c2 and c3 are subjected to full wave rectification and AC / DC conversion separately to obtain an output voltage; and (3) a direct current voltage output by a full wave rectifying circuit is subjected to filtering by adopting a capacitor, and then the filtered and output DC voltage is supplied to an energy storage module. By virtue of the induction type power taking method, the power supply difficulty of a distributed sensor network in a cable channel can be solved, and a new power supplymethod also can be provided for other similar monitoring or detecting or monitoring apparatus and network, and a high application value is achieved.

The invention discloses an energy acquisition circuit used for a piezoelectric-electromagnetic combined type energy harvesting device, relates to the energy acquisition circuit used for an energy harvesting device, and belongs to the technical fields of new energy and power generation. The energy acquisition circuit comprises an electromagnetic energy harvesting device energy acquisition circuit, a piezoelectric energy harvesting device energy acquisition circuit, and a charging circuit used for realizing combined charging and preventing current backflow, wherein the electromagnetic energy harvesting device energy acquisition circuit is used for increasing the output voltage of an electromagnetic energy harvesting device and reducing an output current, thereby increasing output power; the piezoelectric energy harvesting device energy acquisition circuit is used for reducing output voltage of a piezoelectric energy harvesting device and increasing the output current, thereby increasing output power; the output voltage of the electromagnetic energy harvesting device energy acquisition circuit and the output voltage of the piezoelectric energy harvesting device energy acquisition circuit are matched with the charging voltage of a rechargeable battery. According to the invention, alternating current can be converted into direct current to supply power to a load, namely the piezoelectric-electromagnetic combined type energy harvesting device directly supplies power to a load, so that the output power is increased.

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.

The invention provides a low-frequency vibration electromagnetic energy harvesting device. The device includes an energy collector housing, a cantilever beam elongated plate, a cantilever beam short plate, a collision mass block, a magnetic field generation piece and a multi-turn coil. The environment is vibrated so as to provide vibration excitation to the energy collector housing. The cantilever beam elongated plate and the cantilever beam short plate vibrate along with the vibration excitation. The collision mass block collides with the cantilever beam elongated plate at a preset position of the cantilever beam elongated plate, such that the cantilever beam elongated plate generates vibration at a frequency close to the inherent frequency of the cantilever beam elongated plate. The multi-turn coil and the cantilever beam elongated plate vibrate at the same frequency. When a magnetic induction line is cut, an electrical signal is generated. According to the invention, the electromagnetic energy collector can collect low-frequency vibration electromagnetic energy, and greatly increases low-frequency energy harvest bandwidth of an electromagnetic cantilever beam structure.

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.

The invention belongs to the technical field of micro energy and vibration power generation, and discloses a multi-mode composite up-conversion vibration-type environment energy collector. The energy collector comprises a housing, an electromagnetic energy harvesting unit, a piezoelectric energy harvesting unit and an electrostatic energy harvesting unit, wherein a low-frequency vibration beam and a high-frequency beam are connected to the housing, and the low-frequency vibration beam is located above the high-frequency beam; the low-frequency vibration beam is connected with the electromagnetic energy harvesting unit; the piezoelectric energy harvesting unit and the electrostatic energy harvesting unit share the high-frequency beam; the electrostatic energy harvesting unit is located on the bottommost layer of the housing, and the piezoelectric energy harvesting unit is located between the electromagnetic energy harvesting unit and the electrostatic energy harvesting unit. The energy harvesting structures of three different energy harvesting units of static electricity, piezoelectricity and electromagnetism are scientifically and reasonably arranged, so the energy harvesting bandwidth can be effectively widened, the energy output level of the energy harvesting structures is improved, and the environment adaptability of the energy harvester is enhanced.