516 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 modular sensor system comprising a plurality of modules, the plurality of modules comprising one or more sensors, one or more energy harvesters, one or more energy storage devices, one or more wireless radios, and one or more electronics devices, wherein the one or more energy harvesters comprise a photovoltaic cell; and one or more blind-mate connectors contained within each of the plurality of modules, wherein the one or more blind-mate connectors comprise an electrical connector to transmit power and / or data and configured to connect two modules of the plurality of modules together.

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.

A wave power system for extracting energy from water waves, The wave power system includes a basic structure comprising at least one straight track section; at least one effector movably engaged with said basic structurer and adapted for being moved by water waves along said straight track section in a travelling length between two stop locations; and an energy harvesting arrangement arranged for harvesting energy from said relative movements between said energy collector and said basic structurer. The effector includes a backbone structure comprising at least one support shaft having a support shaft axis. At least one winglet comprising a compliant portion is rooted to the support shaft and is turnable between operation modes comprising an acceleration mode an intermediate mode and a deceleration mode relative to the support shaft axis.

The invention discloses a uniformly polarized biological piezoelectric film, a preparation method and application. The biological piezoelectric film comprises a substrate layer and a deposition layer on the surface of the substrate layer, the method comprises the following steps: cleaning and drying a substrate, placing the substrate in a substrate area of physical vapor deposition equipment, and preassembling parallel electrode plates on the back surface of the substrate; then, the biological piezoelectric material to be deposited is placed in a crucible in the physical vapor deposition equipment, and a cavity of the physical vapor deposition equipment is closed; vacuumizing a cavity of the physical vapor deposition equipment to a preset vacuum degree, heating the substrate to a first preset temperature, setting an electric field of a parallel electrode plate on the back surface of the substrate as a preset voltage, and heating the crucible filled with the biological piezoelectric material to a second preset temperature; starting to grow the biological piezoelectric film on the surface of the substrate, and stopping growth after the film reaches a preset thickness; closing the electric field of the parallel electrode plate on the back of the substrate, cooling the substrate and the crucible to room temperature, closing the vacuum system of the physical vapor deposition equipment, and opening the cavity after the cavity returns to normal pressure to obtain a biological piezoelectric material film; the prepared biological piezoelectric film is applied to manufacturing a piezoelectric energy collector. The preparation of the biological piezoelectric film with uniform polarization is realized through the electric field of the substrate area, the direct integration of the device is realized by adopting the physical vapor deposition technology, the method is compatible with the existing semiconductor process, the cost is low, the efficiency is high, and the improvement of the performance of the biological piezoelectric device is also promoted.

The invention discloses a silicon-based micro pulsating heat pipe type thermoelectric energy collecting device which is composed of a micro flat plate pulsating heat pipe, an electric insulation layer and an energy collector formed by a PN structure. The pulsating heat pipe is mainly divided into an evaporation section, a condensation section and a heat insulation section according to the heat flow direction. The electrical insulation layer covers the surface of the silicon substrate on the back of the pulsating heat pipe; pN junctions with different lengths / widths are integrated on the back surface of the insulating layer and have the same heat flow direction as the pulsating heat pipe, and then a potential difference is obtained under the Secret effect. The device is compact in structure, and can meet the requirements of high-heat-flux cooling and energy supply under the conditions of high integration and miniaturization of wireless equipment and wearable devices.

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 discloses an omnidirectional energy collector based on a piezoelectric effect and an adjusting method thereof, and belongs to the technical field of energy collectors. According to the invention, omnidirectional energy collection can be realized, and the complex structure caused by arraying unidirectional collectors along different directions and the difficulty brought by signal processing are avoided; under the action of the mass block and the support slender rod, the bending deformation of the piezoelectric plate is greater than the deformation generated by only placing the side plate, and meanwhile, the defect of low torsional deformation voltage signal is avoided; the inherent frequency of the structure can be changed through the mass and the height of the mass block, resonance with the excitation frequency is achieved, bending deformation of the piezoelectric plate is increased, and therefore piezoelectric voltage output is improved. Due to the fact that the side plates have certain elasticity, when the mass block swings back, the side plates swing back, the structure that the side plates are arranged up and down is adopted, and motion interference generated when the side plates swing back can be effectively avoided.

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.

The invention discloses a random control method of a three-stable-state piezoelectric cantilever beam structure energy harvester, and belongs to the field of energy harvesters. The implementation method comprises the following steps: introducing white noise by considering random excitation in an environment, establishing an electromechanical coupled strong nonlinear three-stable state energy harvester model, and carrying out dimensionless processing on the energy harvester model to obtain an electromechanical coupled strong nonlinear three-stable state energy harvester dimensionless model; based on the acquired displacement data and voltage of the three-stable-state energy harvester, establishing a model equation of the three-stable-state energy harvester by using dimensionless coefficients zeta, theta, km (m = 1, 2, 3) and D in an electromechanical coupling equation of the strong nonlinear three-stable-state energy harvester by using a sparse identification method of a nonlinear power system; based on a strong nonlinear three-stable-state energy harvester electromechanical coupling equation established by using an SINDy method and system response, an optimal control law alpha is calculated by using a model prediction control method, a control signal is applied through a Buck-boost circuit according to the optimal control law alpha, random control of the three-stable-state piezoelectric cantilever beam structure energy harvester is realized, and the output power of the energy harvester is increased.

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 a magnetism-force-electricity coupling energy collector and method based on an asymmetric torsional mode, and belongs to the technical field of energy collection. The asymmetric bending beam piezoelectric transducer comprises a piezoelectric plate, an asymmetric bending beam structure, a mass block and a fixing screw rod, the polarization direction of the piezoelectric plate is arranged along the thickness direction, electrode coatings are arranged on two side surfaces of the piezoelectric plate along the thickness direction, the electrode coatings on the two side surfaces are defined as a bonding electrode surface and a leading-out electrode surface respectively, the asymmetric bent beam structure comprises a main beam, a long limb and a short limb which are arranged in an integrated structure, and the main beam is arranged on the main beam. A fixing hole is formed in the middle of the main beam, the bonding electrode faces are bonded and fixed to the main beam through epoxy resin and distributed on the left side and the right side of the fixing hole, the leading-out electrode faces lead out electrical signals through wires, and the mass block is fixed to the asymmetric bent beam structure through magnetic force. One end of the fixing screw rod is connected with the fixing hole, and the fixing screw rod is installed on the rigid base.

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.

The invention provides a laminated thermoelectric-piezoelectric hybrid energy collector. The collector comprises a laminated thermoelectric conversion unit and a piezoelectric conversion unit. The thermoelectric conversion unit comprises a heat-conducting sheet, a thermoelectric material, a conductive copper sheet, a load resistor and a wire. The piezoelectric conversion unit comprises a substrate layer cooling fin, a piezoelectric plate and a mass block. According to the hybrid energy collector, the thermoelectric conversion unit and the piezoelectric conversion unit are integrated, the thermoelectric energy converter and the piezoelectric energy converter are combined into a hybrid energy collection device, environmental waste heat and environmental wind energy are converted into electric energy at the same time, the manufacturing cost of the energy collector is reduced, and meanwhile the environmental energy utilization efficiency is improved. According to the device, heat energy generated by the waste heat discharging device and environmental wind energy can be fully utilized at the same time for recycling power generation capacity, high energy collection efficiency is achieved, the device is simple and stable, the practicability of the device is improved, and good application prospects are shown in the field of energy collection.

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 voltage comparator circuit for a power source having an energy harvester and an energy storage. The circuit comprises a first voltage input node and a second voltage input node arranged to respectively receive a first voltage level of a first output of the energy harvester and a voltage level of a second output of the energy storage; an output node arranged to switch in response to a comparison of the first and second first voltage levels; and a plurality of semiconductor junction devices arranged to provide a floating local ground arranged to vary in response to a change of the first and / or the second voltage level, wherein the floating local ground has a voltage level higher than an absolute ground connected to the voltage comparator circuit; wherein the floating local ground is arranged to prevent a breakdown of circuit components due to a voltage difference connected at terminals of each of the circuit component exceeding a breakdown voltage of the respective circuit component.

A monitoring circuit including a pickup circuit to monitor a voltage applied to a chamber of a linear accelerator is disclosed, and more specifically, an ion implantation system and a monitoring circuit for use therewith are disclosed. The monitoring circuit is electrically isolated from the linear accelerator and is also electrically isolated from a controller that receives input from the circuit and controls the linear accelerator. In some embodiments, the monitoring circuit also includes an energy harvester to capture energy without any physical connection to the controller. For example, this can be achieved using light energy or electromagnetic energy. In some embodiments, the monitoring circuit includes an analog / digital converter to convert a signal received from the pickup circuit into a digital value. In other embodiments, the monitoring circuit transmits an analog voltage to the controller. The output from the monitoring circuit may include the amplitude and phase of the voltage being applied to the corresponding chamber.