330 results about "Energy harvester" patented technology

A barrier operating system includes a barrier operator configured to emit a charging signal and configured to open and close a movable barrier. The system also includes a wireless obstruction detection system comprising: a transmitter detector and a receiver detector. The transmitter detector includes a battery; a transmitter configured to transmit an IR beam; a communication module in wireless two-way communication with the barrier operator; and an energy harvester configured to receive the charging signal and direct power to the battery of the transmitter detector. The receiver detector includes a battery; a receiver configured to receive the IR beam from the transmitter; a communication module in wireless two-way communication with the barrier operator; and an energy harvester configured to receive the charging signal and direct power to the battery of the receiver detector.

The present invention belongs to the technical field of ceramic material preparation methods, and specifically relates to a lead-free piezoelectric ceramic, its preparation method, and application. The lead-free piezoelectric ceramic is a KNN-based lead-free piezoelectric ceramic or a BT-based lead-free piezoelectric ceramic having a perovskite structure; the KNN-based lead-free piezoelectric ceramic is prepared by doping gallium nitride with potassium sodium niobate (KNN) ceramic as the matrix, and the chemical formula is 0.955 (K 0.48 Na 0.52 )Nb 0.98 Sb 0.02 O3‒0.045Bi 0.5 Na 0.5 ZrO3‒0.75mol% GaN; The BT-based lead-free piezoelectric ceramic is prepared by doping gallium nitride with barium nitride (BT) as the matrix, and the chemical formula is (Ba 0.85 Ca 0.15 )(Ti 0.9 Zr 0.1 ) O‒1.75mol% GaN; the lead-free piezoelectric ceramic has a dense structure, is lead-free, and exhibits excellent electrochemical properties. The preparation method for the lead-free piezoelectric ceramic is simple, low-cost, pollution-free, and utilizes readily available raw materials. The lead-free piezoelectric ceramic can be used to prepare energy harvesters and has significant application value.

The invention belongs to the technical field of electromagnetic induction and friction nanometer power generation, and particularly relates to a vibration energy collector based on electromagnetic induction and friction nanometer hybrid power generation. Comprising a friction nanometer power generation unit and an electromagnetic induction unit. The friction nanometer power generation unit comprises an upper insulating support plate, a lower insulating support plate and a friction pair; the friction pair comprises an upper friction assembly and a lower friction assembly, and the upper friction assembly and the lower friction assembly trigger the contact and separation process through external vibration to achieve friction electricity generation. The electromagnetic induction unit comprises a coil, a magnet and a steel body which are sequentially nested, the coil and the magnet are fixedly connected with the upper friction assembly and the lower friction assembly respectively, the steel body is fixedly connected with the lower insulation supporting plate, the magnet and the steel body form a closed magnetic circuit, and the magnet and the coil trigger relative movement through external vibration to achieve electromagnetic power generation. The device is novel in structure and distinct in gradation, integrates a triboelectrification effect and an electromagnetic induction principle, has high-voltage output and high-current characteristics, and can efficiently realize continuous conversion from environment vibration energy to electric energy.

A wireless mouse operatively coupled to an information handling system including a wireless mouse microcontroller and a wireless mouse power management unit (PMU) to provide power to the wireless mouse microcontroller and the wireless mouse PMU operatively coupled to a battery and an ultracapacitor. The wireless mouse further comprising a click haptic solenoid energy harvester device placed under a wireless mouse button with a striking arm to interface with a mouse button plate when the wireless mouse button is pressed down, the striking arm urging a magnet through the wire coil when the wireless mouse button is pressed down to change the ultracapacitor. The wireless mouse microcontroller determines when the wireless mouse is in a standby mode based on input from an actuation / engagement sensor and, with the wireless mouse PMU, switch a power source from a battery to the ultracapacitor when the wireless mouse is in the standby mode.

The invention relates to the technical field of friction power generation, in particular to an energy collection and vibration sensing device and system for a transmission line, which comprises a shell, a vibration sensor arranged in an inner cavity of the shell, and energy collectors arranged at the upper end and the lower end of the vibration sensor respectively. The vibration sensor comprises a balancing weight, and elastic pieces are arranged between the upper end and the lower end of the balancing weight and the adjacent energy collectors respectively. A positive friction piece is installed on the outer ring of the balancing weight, and a negative friction piece is installed on the inner wall of the shell. The positive friction piece can move up and down along with the balancing weight and make contact with the negative friction piece so as to generate electric signals. The energy collector comprises a positive electrode power generation membrane group and a negative electrode power generation membrane group which are oppositely arranged up and down and can make contact with each other and achieve friction power generation, one of the positive electrode power generation membrane group and the negative electrode power generation membrane group abuts against the shell, and the other abuts against the end, away from the balancing weight, of the elastic piece.

An energy harvester according to an embodiment of the present technology includes a coil section, a maintaining portion, and a rectifier. The coil section includes a core that is made of a magnetic material, and a wire rod that is wound around the core. The maintaining portion maintains the coil section on a surface of a target that includes a metallic body or a human body, such that an axis of the coil section intersects the surface of the target. The rectifier rectifies output from the coil section.

The invention discloses a foldable piezoelectric vibration energy collector, and the collector comprises a cantilever beam which is provided with a fixed end at one end and a free end at the other end; the mass block is located below the cantilever beam, fixedly connected with the free end and used for adjusting the resonant frequency of the cantilever beam; the piezoelectric element is arranged on the cantilever beam; when the cantilever beam vibrates in the vertical direction, the piezoelectric element generates electric energy; the electric energy collecting element is electrically connected with the piezoelectric element and is used for collecting the electric energy; wherein the piezoelectric element comprises a plurality of piezoelectric layers, the plurality of piezoelectric layers are distributed at intervals in the vertical direction and are arranged in parallel, and every two adjacent piezoelectric layers are fixedly connected. Under the condition that a larger mass block or a longer cantilever beam does not need to be arranged, the energy conversion efficiency of the piezoelectric vibration energy collector in an ultralow-frequency vibration environment can be improved, and the miniaturization and wearable requirements of devices or electronic equipment can be met.

The invention discloses a double-cantilever-beam piezoelectric vibration energy collector based on an annular steady state, which comprises a piezoelectric transducer, an elastic cantilever beam, a magnet and a base, after the piezoelectric transducer is mounted on the elastic cantilever beam to form a double-layer composite cantilever beam, the magnet is mounted at the free end of the double-layer composite cantilever beam, nonlinear coupling is carried out through repulsive magnetic force, and the piezoelectric transducer is connected with the base. The two-dimensional annular potential well structure with the adjustable potential well is formed, and the energy collector can easily trigger large-amplitude inter-well movement through the potential well structure. Through the nonlinear coupling induced internal resonance effect, inter-well energy transfer and two-dimensional potential well modulation are realized, and vibration energy can be efficiently captured in a broadband without a large amount of energy input or a complex structure. According to the design, the collection efficiency of low-frequency, low-intensity and multi-direction environment vibration energy in a wide working bandwidth is good.

The invention relates to a design method and device of a vibration energy taking device, computer equipment and a storage medium. The method comprises the following steps: respectively determining influence ratios of a coil, a magnet and a spring on key performance parameters based on initial design parameters; wherein the key performance parameters comprise the characteristic frequency, the device volume and the output power of the vibration energy taking device; determining an optimal design sequence of the coil, the magnet and the spring based on the influence ratio; component parameters of the coil, the magnet and the spring are determined based on the optimization design sequence, so that the power density of the vibration energy taking device is the maximum power density, and the characteristic frequency of the vibration energy taking device is the target characteristic frequency. Through the design method of the invention, the vibration energy taking device with high power density can be obtained.

There is provided a triboelectric nanogenerator which includes a negative electrode, a negative tribolayer, a positive tribolayer, and a positive electrode. The positive tribolayer and the positive electrode are made of the same material. The material is a surfactant-protected ionic conductive material.

Disclosed herein are system, apparatus, article of manufacture, method and / or computer program product embodiments, and / or combinations and sub-combinations thereof, for energy harvesting, automatic recharging, and power consumption reduction for smart home sensors, devices, and networks. An example embodiment operates by determining an estimated or predicted future time that a device will have insufficient electrical energy in an energy storage of the device for the device to operate. The device can be, for example, an internet-of-things device, such as a sensor, actuator, and / or RF communications repeater, that includes a radio frequency communication transmitter and an energy harvester. Based on and prior to the estimated or predicted future time, there is commanded an activation of a directed energy recharger in sufficient proximity to the device such that a directed energy beam transmitted or emitted by the directed energy recharger upon activation increases the energy stored in the energy storage of the device.

The invention discloses a metamaterial vibration energy collector based on an anti-spiral acoustic black hole structure, which comprises the anti-spiral acoustic black hole structure, an extended mass block and a piezoelectric structure, and is characterized in that the anti-spiral acoustic black hole structure comprises an ABH beam and an extended beam, the ABH beam is bent into an Archimedes spiral shape, and the thickness of the ABH beam is gradually reduced from the starting point end to the terminal end of the spiral; the extension beam extends outwards from the terminal of the ABH beam, and the thickness of the extension beam is the same as the minimum thickness of the ABH beam; the piezoelectric structure is arranged on the expansion beam, and the expansion mass block is combined with the tail end of the expansion beam. According to the invention, the conventional idea that a large-size acoustic black hole needs to be adopted for coping with low-frequency vibration traditionally is broken through, the method is suitable for a space-limited scene, a longer effective wave propagation path is realized in the same space, the energy focusing or dissipation effect is enhanced, the performance of capturing low and medium-frequency vibration is realized while the high-frequency performance is maintained, and the method is suitable for large-scale application. And efficient energy collection is realized.

An apparatus is disclosed for multi-capacitor energy harvesting. In example aspects, the apparatus includes energy storage including a first capacitor and a second capacitor. The apparatus also includes an energy harvester including at least one rectifier and one or more switches. The switches can be controlled to initially charge the first capacitor and subsequently charge the second capacitor.

The invention relates to the field of direct-current energy taking, in particular to a steel rail potential direct-current energy taking device and method applied to subway sensor power supply. In order to solve the problems of sensor power supply in a subway direct-current power supply system, for example, cable laying is difficult, battery maintenance cost is high, and environment energy collection is limited, the device utilizes steel rail potential to carry out efficient energy collection. The device comprises a main power module and a control module, wherein the main power module comprises a rectifier bridge, a double-MOSFET structure, a voltage-stabilizing filter capacitor Cbus and an energy collector; and the control module executes a maximum power point tracking strategy through the voltage measurement interface and the grid control interface. The strategy comprises a periodic open-circuit voltage acquisition stage, an optimal voltage regulation stage and a voltage holding stage, the input voltage is stabilized at 1 / 2 of the open-circuit voltage by controlling the on-off state of the double MOSFETs, and the Cbus voltage is dynamically maintained to fluctuate around the optimal reference voltage by + / -5%. Stable and efficient power supply is realized, and the maintenance cost is reduced.

The application discloses a hybrid wave energy collection device, which comprises a spherical shell assembly composed of an upper spherical shell and a lower spherical shell, a wave energy capturing module arranged in the spherical shell assembly and used for capturing multi-directional wave energy and converting the wave energy into mechanical energy, and an energy conversion module used for converting the mechanical energy into electric energy. The wave energy capturing module converts wave motion into relatively straight-line motion and variable-radius swing motion. The wave energy capturing module comprises a moving rod, a top end of which is rotatably connected with an inner wall top end of the upper spherical shell; a support assembly, which comprises an upper support, a lower support and a plurality of connecting supports, a middle part of the upper support is provided with a through hole, a center of the lower support is provided with a mounting hole, and a bottom of the lower support is provided with a connecting rod; a sliding body, which is rotatably connected with the connecting rod, a lower end surface of the sliding body is a spherical surface and is matched with an inner wall of the lower spherical shell; the moving rod passes through the through hole of the upper support of the support assembly and is embedded in the mounting hole of the lower support; and the moving rod is coincident with a central axis of the support assembly. The application has the characteristics of strong working condition adaptability, high recovery efficiency, high power output density, high space position utilization rate and stable electric energy output and can provide power supply for low-power wireless sensors and provide a reliable technical scheme for realizing self-driving of wireless sensing equipment in water areas.

Disclosed herein are system, apparatus, article of manufacture, method and / or computer program product embodiments, and / or combinations and sub-combinations thereof, for energy harvesting, automatic recharging, and power consumption reduction for smart home sensors, devices, and networks. An example embodiment operates by determining an estimated or predicted future time that a device will have insufficient electrical energy in an energy storage of the device for the device to operate. The device can be, for example, an internet-of-things device, such as a sensor, actuator, and / or RF communications repeater, that includes a radio frequency communication transmitter and an energy harvester. Based on and prior to the estimated or predicted future time, there is commanded an activation of a directed energy recharger in sufficient proximity to the device such that a directed energy beam transmitted or emitted by the directed energy recharger upon activation increases the energy stored in the energy storage of the device.

The invention provides an energy recovery and distribution method, device and equipment and a readable storage medium, and the method comprises the steps: obtaining an electric signal of an energy harvester under the condition that the vibration energy of a vehicle is collected through the energy harvester to generate electric energy, and converting the electric signal into a digital signal; inputting the digital signal into a pre-training model to obtain a predicted vibration frequency output by the pre-training model, and determining a current vibration frequency of the vehicle; according to the difference value between the predicted vibration frequency and the current vibration frequency, the capacitance of an impedance matching network is adjusted to adjust impedance; the impedance matching network is connected with the energy harvester; and distributing the electric energy generated by the energy harvester to at least one load. The energy transmission efficiency in the energy recovery and distribution process can be improved.

The invention relates to an energy buffer assisted near-field MISO-SWIPT system. The system comprises a base station and user equipment, wherein the base station and the user equipment are distributed in a multipath non-line-of-sight dominant scene; the base station is used for transmitting a radio frequency signal on a downlink; the user equipment is configured with a power divider, an information decoder, an energy collector and an energy buffer, and is used for sending a signal to the base station on an uplink by using energy obtained by conversion based on a radio frequency signal; wherein the power divider is used for receiving a radio frequency signal, dividing the received radio frequency signal into a first power flow and a second power flow, and converting the first power flow and the second power flow into first energy and second energy; the information decoder is used for receiving the first energy and performing information decoding; the energy collector is used for collecting second energy and transmitting the second energy to the energy buffer; compared with the prior art, the communication reliability and energy utilization efficiency problems of the energy limited equipment in the near-field multipath environment are solved.

A wireless keyboard operatively coupled to an information handling system includes a wireless keyboard microcontroller and a wireless keyboard PMU to provide power to the wireless keyboard microcontroller and the wireless keyboard PMU operatively coupled to a battery and an ultracapacitor. The wireless keyboard further including a piezoelectric energy harvester device operatively coupled to the wireless keyboard PMU and placed under a first key formed on the wireless keyboard to charge the ultracapacitor when the key is actuated and a keyboard actuation / engagement agent to, when executed by the wireless keyboard microcontroller, determine the wireless keyboard enters a standby mode and with the wireless keyboard PMU switch a power source to the ultracapacitor when in standby mode.

A method including drilling a wellbore using a drill bit connected to a drill string. The drill string includes a vibrational energy harvester and a tool disposed inside a casing of the drill string. The vibrational energy harvester includes a stator including a conductive coil, and a rotor including magnets disposed outside the conductive coil. The rotor is unpowered. The rotor is free to rotate outside the conductive coil, and the rotor is unattached to other components of the drill string. The method also includes generating vibrations in the drill string by engaging the drill bit to a bottom of the wellbore. The method also includes harvesting electricity generated in the stator as the rotor rotates in response to the vibrations. The method also includes supplying, via an electrical connection between the stator and the tool, the electricity to the tool.

A method for operating a radio frequency energy harvester (RFEH) comprises, for each rectifier of the RFEH having connected thereto a switching device configured to be actuated between an open state in which an output of the rectifier is open-circuited to form part of a combined DC output voltage and a closed state in which the output of the rectifier is short-circuited to be omitted from the combined DC output voltage, measuring a voltage difference between the rectifier's input and output, comparing the voltage difference to a voltage threshold, when the voltage difference is below the voltage threshold, causing the switching device to be actuated to the closed state, and when the voltage difference is greater than or equal to the voltage threshold, causing the switching device to be actuated to the open state.

This invention relates to the fields of microelectromechanical systems (MEMS) and new energy technologies, and discloses a piezoelectric energy harvester based on a nonlinear gradient negative Poisson's ratio structure. Its elastic matrix has a fixed end and a free end, with a negative Poisson's ratio structural segment on it. The piezoelectric transducer element is bonded to the surface of the negative Poisson's ratio structural segment via an epoxy resin adhesive layer. The core innovation lies in the nonlinear monotonically decreasing thickness of the elastic matrix from the fixed end to the free end along its length. This change profile is defined by a specific cubic polynomial function, which can accurately approximate the theoretical model of an isostress beam, making the stress distribution on the matrix surface tend to be uniform during vibration. Simultaneously, the lateral expansion characteristics of the negative Poisson's ratio structural segment and the longitudinal stress enhancement effect of the nonlinear thickness synergistically amplify the charge output of the piezoelectric element. This invention significantly improves the utilization efficiency of piezoelectric materials and the power density of the energy harvester, and has the advantages of compact structure, high energy conversion efficiency, and mass production via 3D printing.

An energy harvesting mechanism for an implantable device is provided. In some embodiments, an apparatus includes a housing configured for implantation in a patient. The housing may have a proximal end, a distal end, and a longitudinal axis extending between the proximal end and the distal end. The apparatus may also include a power source positioned within the housing, and an energy harvesting mechanism positioned within the housing and configured to charge the power source. The energy harvesting mechanism may include a plurality of piezoelectric elements aligned with a longitudinal axis of the housing. Each piezoelectric element may face a different direction.

A moisture-driven electrical generator includes a vanadium-pentoxide membrane.

The utility model provides a micro electric energy collection circuit. The rectification unit is responsible for converting the alternating current output of the piezoelectric collector into a pulsating direct current signal; the synchronous charge extraction unit comprises a self-powered peak detection circuit and a synchronous switch controller and is responsible for efficiently transferring charges from a piezoelectric element to an electric quantity extraction inductor; the secondary electric energy storage unit comprises a primary electric energy storage device, a detection switch, a charging circuit, a secondary electric energy storage device and a voltage stabilization output circuit, input and output of each functional module are sequentially connected in series, and electric energy flows in a one-way mode; the absorption circuit is responsible for absorbing the electric energy in the inductor extracted by the circuit and effectively storing and stably outputting the electric energy; all the functional units are sequentially connected in series, and electric energy flows from the rectifying unit to the voltage stabilizing output circuit of the secondary storage unit in a one-way mode. The input end of the rectification unit is connected with the output end of the micro-electric energy collector, and the output end of the secondary storage unit is connected with the low-power-consumption internet-of-things sensor load. According to the utility model, intermittent weak AC electric signal energy from piezoelectric elements can be efficiently captured, and the intermittent weak AC electric signal energy can be adjusted to a stable output voltage of the Internet of Things sensor through secondary storage.

A dimmable window system (200) includes a window side (204) holding a window (205), a dimmable member (212), and an energy harvester (220) configured to harvest energy to provide power to the dimmable member (212) and other components of the dimmable window system (200). The dimmable window system (200) can be configured for a vehicle, such as an aircraft (100).

This invention discloses a contact-separation triboelectric power generation device, method, and application based on a rotating shaft, belonging to the field of air-fluid power generation technology. This invention solves the problem of poor compatibility between the energy harvesting structure and rotational motion in current energy harvesting methods that install energy harvesters on rotating shafts and collect nearby air-fluid. The invention includes: a rotating shaft connection mechanism for connecting to the circumferential surface of the rotating shaft; a contact-separation triboelectric power generation mechanism for collecting air-fluid energy during shaft rotation and converting the collected air-fluid energy into electrical energy; and a support frame with at least one arc-shaped through-slot, within which are arranged a first fixed power generation component, a second fixed power generation component, and a movable power generation component, the movable component being movable along the axial direction of the rotating shaft within the arc-shaped through-slot. This invention features a simple configuration, good economy, and high fluid energy conversion efficiency, making it suitable for low-velocity or turbulent environments, such as confined spaces like train bogie shafts.

A solid state energy harvester includes an anode including a first transition metal sub-oxide; a cathode comprising a second transition metal sub-oxide; and a separator interposed between the anode and the cathode; wherein at least one of the anode, the cathode or the diaphragm contains water, and wherein the collector generates electrical power when electrically connected to an external load.

The present invention relates to an upconversion nanomaterial with red light emission and a preparation method thereof, belonging to the technical field of luminescent materials. The upconversion nanomaterial with red light emission provided by the present invention has LiErF4:0.5%Tm as a core layer, and is coated with a LiYF4:50%Yb,x%Er,y%Ce shell layer and a LiYF4 passivation layer in sequence; its chemical formula is LiErF4:0.5%Tm@LiYF4:50%Yb,x%Er,y%Ce@LiYF4; wherein x=0-15 and y=0-4. The present invention dopes Er in the first shell layer at an appropriate concentration. 3+ ,Ce 3+ and Yb 3+ , and Er 3+ As an energy harvester, Ce 3+ With Er 3+ The cross-relaxation effect increases Er 3+ Yb 3+ The collection efficiency of spontaneous emission energy is 3+ The energy is transferred back to the nuclear layer, resulting in a significant red light emission.

The invention discloses a rotary impact vibration energy harvester for lower limbs. The rotary impact vibration energy harvester comprises a one-way swing unit and a rotary power generation unit, the one-way swinging unit transmits rotation to the rotating power generation unit through a one-way bearing, and transmits swinging mechanical energy to the rotating power generation unit for one-way rotating motion, so that electric energy is generated; the one-way swing unit comprises a swing rod and a one-way bearing. When the swing rod swings bidirectionally, the inner ring of the one-way bearing is driven to rotate bidirectionally. The rotary power generation unit comprises a rotator and a plurality of power generation units, the power generation units and the rotator are located on the same horizontal plane, and the power generation units are circumferentially arranged on one side wall of the shell; when the rotator rotates, the movable magnet moves and further acts on the piezoelectric ceramic piece and the power generation coil to generate electric energy.