267 results about "Nanogenerator" patented technology

The invention provides structures and synthesis of a class of piezoelectric monomers and COFs with fluorine-substituted side chains tethered on the peripheral position of an aromatic moiety (thus different functional side chains). The multi-fluoro groups on the mentioned piezoelectric COFs provide abundant piezoelectric active sites, which enable the application as the active layer for PENGs. The exemplary embodiments also provide a process for the fabrication of a piezoelectric COF and a process for the fabrication of the piezoelectric nanogenerator utilizing mentioned piezoelectric COF.

The invention discloses a gait sensing unit of a triboelectric nano generator based on liquid metal / PDMS porous sponge, and relates to the field of gait sensors, and the sensing unit with high porosity, flexibility and durability is prepared through a template method. A white granulated sugar template is adopted to construct a three-dimensional communicated porous structure, so that uniform dispersion of LM in a PDMS matrix is realized, and the technical problem that low density and high sensitivity of traditional TENG are difficult to consider at the same time is solved. The preparation method comprises the steps of mixing and stirring, template infiltration, curing molding, template dissolution and the like, flexible sensors with thousand secondary cycle stability can be produced in batches, and the flexible sensor is suitable for wearable health monitoring equipment.

The invention relates to the technical field of fluid pressure sensing, in particular to a triboelectric hemispherical composite film pressure sensing device and a control method thereof, and the device comprises a shell, a top gland and a sensing unit located in the shell. The sensing unit comprises an insulating cover plate, a composite film, an insulating ring cover, a transmission buffer block, an annular end cover and a hemispherical composite film from bottom to top. The composite film directly contacts with hydraulic oil, deforms under pressure and acts with the copper foil on the lower side of the transmission buffer block to generate a first electric signal; when the pressure is increased, the transmission buffer block is pushed to move upwards, so that the spherical copper foil on the upper side acts with the hemispherical composite film to generate a second electric signal. Self power supply is realized by utilizing a friction nanometer power generation principle, wide-range monitoring is realized through a double-layer sensing structure, and the sensor has the advantages of high sensitivity, good sealing performance, adaptability to complex hydraulic working conditions and the like in cooperation with a spherical surface contact design and a multi-sealing structure.

The invention relates to the technical field of conductive materials, and discloses ECC concrete based on carbon black doping and a preparation method and application thereof.The preparation method includes the following steps that cement, slag, quartz sand, silica fume and limestone powder are subjected to dry mixing to obtain a dry material; dispersing carbon black and a dispersing agent in water to obtain carbon black dispersion liquid; and mixing the dry material, the carbon black dispersion liquid, a polycarboxylate superplasticizer and polyethylene fibers to obtain the carbon black doped concrete. The conductivity of the ECC concrete is improved through the carbon black, the ECC concrete is applied to the field of friction nano-generators, potential difference can be formed through extrusion of an automobile in the using process, and therefore current is output to supply power to traffic lights, monitoring equipment and the like.

The invention discloses surface-modified self-repairing polyurethane, a friction nano-generator, a preparation method and application, and belongs to the technical field of material scientificity, and the preparation method of the surface-modified self-repairing polyurethane comprises the following steps: uniformly mixing a fluorine-containing group compound and hexamethylene diisocyanate, and carrying out heating reaction, extraction and drying to obtain the surface-modified self-repairing polyurethane. Mixing with serinol, dissolving in an organic solvent, heating for reaction, and drying to obtain a fluorine-containing group chain extender; and dissolving a quadruple hydrogen bond-containing chain extender and a fluorine-containing group chain extender in an organic solvent, adding the isocyanate-terminated polyurethane prepolymer, and carrying out stirring reaction, mold reversing and drying to obtain the surface-modified self-repairing polyurethane. The self-repairing polyurethane can effectively improve the environmental adaptability and the service life of the friction nanometer generator. The surface charge transfer efficiency is enhanced due to good conductivity, and the power generation performance is improved; meanwhile, the mechanical property is enhanced through hydrogen bond crosslinking, so that compared with traditional equipment, the environment universality is better.

The invention discloses a self-sensing intelligent thrust bearing based on a nano-generator and a state monitoring method of the self-sensing intelligent thrust bearing. The thrust bearing comprises a shaft ring, a seat ring, a rolling body, a retainer and a nano-generator sensing structure, wherein the rolling body and the retainer are arranged in an annular raceway between the shaft ring and the seat ring; obtaining a first voltage signal and a second voltage signal through a nano generator sensing structure; the state monitoring method comprises the following steps: acquiring a first voltage signal and a second voltage signal; respectively preprocessing the two paths of signals and then carrying out data-level fusion; dividing the fusion signal into a training set, a verification set and a test set, and training a data-level fusion 1D-CNN model; and inputting a to-be-tested signal into the trained model to realize intelligent classification of the bearing operation state. According to the invention, multi-source signal fusion sensing and real-time monitoring of the running state of the thrust bearing are realized, the structure is compact, the sensitivity is high, and the identification is accurate.

The utility model discloses a fan blade type friction nanometer generator based on seabed ocean current energy, which comprises a shell, fan blades and a friction generator, a power generation cavity and a blade cavity are respectively arranged at two ends in the shell, the power generation cavity and the blade cavity are two mutually independent cavities, the fan blades are rotatably arranged in the blade cavity, the friction generator is arranged in the power generation cavity, and the friction generator is arranged in the friction generator. The fan blades and the friction generator are coaxially arranged and are in transmission connection through the magnetic coupling part; a water flow channel is formed in the shell, a flow guide cover is arranged in front of the fan blades, and water flow enters the water flow channel through the flow guide cover and pushes the fan blades to rotate. By arranging the power generation cavity and the blade cavity which are isolated from each other, the power generation component and the driving component are installed separately, transmission is conducted through the magnetic coupling component, a dynamic sealing structural part does not need to be installed, and the power generation component can be independently installed in the power generation cavity in a sealed mode; and meanwhile, as no dynamic sealing structural member is arranged, the transmission resistance is greatly reduced, and the mechanical loss is reduced.

The invention relates to the technical field of nanometer energy and sensing, in particular to a ferrite film direct current friction nanometer generator and a preparation method and application thereof.The ferrite film direct current friction nanometer generator comprises a positive electrode friction layer and a negative electrode friction layer, the negative electrode friction layer comprises a substrate, a conductive electrode and a functional layer, and the functional layer comprises an MZF film. The positive friction layer comprises copper metal; the functional layer of the negative electrode friction layer and the negative electrode friction layer are arranged in an opposite contact manner through a bearing type structure unit; the chemical formula of the MZF thin film is MnxZn (1-x) FeyOz, the value range of x is 0.5-0.7, the value range of y is 2-3, and the value range of z is 3-4. The MZF thin film in the nano-generator provided by the invention has a polycrystalline structure and a grain boundary interface polarization characteristic, the grain boundary interface polarization is enhanced when the temperature rises, carrier diffusion-drift balance is broken, and diffusion-dominated direct current output is realized.

The application discloses a pressure sensor based on friction nanogenerator, which can be deployed in a wearable device for monitoring pulse fluctuation, or deployed in an electronic device with a touch screen for detecting touch action. The sensor comprises two friction layers and at least one electrode layer. The two friction layers are respectively made of materials with different electron loss and gain abilities. The surface of at least one friction layer comprises a multi-stage micro-nano structure for inducing equal and opposite net charges corresponding to the applied pressure on the two friction layers under pressure. The multi-stage micro-nano structure comprises at least two kinds of micro-nano columnar structures with different heights. The electrode layer is used for generating current based on the net charges. The application can make the pressure sensor maintain high sensitivity to large static force through the designed multi-stage structure with different heights, and can expand the measurement range of the pressure sensor, so that the sensor maintains the same or similar sensitivity under various static forces.

The invention discloses a marine air bottle condensate water residue discharge monitoring device based on friction nanometer power generation, which comprises a short pipe section, a fixing device, a TENG sensor unit, a wire, a sensor electronic module and a cable waterproof joint, and is characterized in that the fixing device is fixed on the inner wall of the short pipe section, the TENG sensor unit is fixed in a clamping groove of the fixing device, and the wire is fixed on the TENG sensor unit; the sensor electronic module is fixed on the short pipe section, one end of the cable waterproof joint is connected to the short pipe section, the other end of the cable waterproof joint is connected with the sensor electronic module, the TENG sensor unit is connected with the sensor electronic module through a wire, and the wire is led out of the short pipe section from the cable waterproof joint to be connected to the sensor electronic module. The marine air bottle condensate water residue discharging monitoring device based on friction nanometer power generation can be arranged in a short pipe with a small drift diameter, space is saved, through module design, elements are convenient to install and replace, the structure is simple, material selection is not limited, corrosion resistance is achieved, pollution to the environment is reduced, the manufacturing cost is low, the customizable degree is high, and limitation of ship types is avoided.

The application discloses a kind of high-temperature-resistant bifunctional nanogenerator materials and preparation method and application thereof, belong to high-temperature-resistant sensitive material development field;Solve the poor flexibility, single function and lead toxicity of traditional high-temperature piezoelectric sensor and other problems;The application is that piezoelectric polymer polyacrylonitrile and anhydrous acetate are fully mixed in organic solvent and pre-cyclization, then the method of electrospinning is used to prepare flexible nanofiber membrane, and the composite fiber membrane is heat treated, and nanogenerator material is prepared;The nanogenerator material described in the application can work continuously in an environment higher than 450 DEG C, has pyroelectric function, has dual sensitivity to force and heat, and has good flexibility.The preparation method is simple, low cost, environment-friendly and excellent in electrical output performance, and is expected to have good application prospect in the field of force and heat sensitive signal monitoring and sensing in extreme high-temperature environment.

This invention discloses a solar-driven integrated device for collecting freshwater and droplet energy, comprising: a photothermal evaporation mechanism including a seawater tank, a light-transmitting part disposed on the seawater tank, a middle-layer collection part disposed on the light-transmitting part, a high-layer collection part disposed on the light-transmitting part, a floating part disposed within the seawater tank, a flow guide part disposed on the seawater tank, and an isolation part disposed on the flow guide part; and a droplet power generation mechanism including a storage part disposed within the seawater tank, a protection part disposed within the storage part, a power generation part disposed on the protection part, and an adjustment part disposed on the light-transmitting part. This solar-driven integrated device for collecting freshwater and droplet energy combines a triboelectric nanogenerator with photothermal interfacial evaporation, enabling the simultaneous use of solar energy for seawater desalination and freshwater collection, while also collecting droplet energy, thus converting mechanical energy into electrical energy and improving energy utilization efficiency.

The invention relates to a blade-free friction-electromagnetic composite generator based on an eddy current oscillation effect, and belongs to the technical field of wind energy collection and self-powered sensing. The invention provides a blade-free friction-electromagnetic composite generator with a fully-packaged inverted trapezoidal shell to solve the problems that an existing wind energy friction nanometer generator is poor in severe environment adaptability, materials are prone to being abraded, the generator is not friendly to birds, and all-directional wind energy collection is difficult to achieve. An internal magnet ball and a stainless steel ball are driven to move relatively through an eddy current oscillation effect, and meanwhile, a peripheral multi-layer contact separation type friction nanometer generator and a central electromagnetic generator unit are excited, so that low-wind-speed starting, full-wind-direction, wear-free and high-stability wind energy efficient conversion is realized, and a self-powered environment monitoring and lighting system is successfully driven.

The invention discloses an imaging system and an imaging method. The imaging system comprises a friction nanometer generator, a detection unit and a processor, the friction nanometer generator comprises a first friction layer, and the manufacturing material of the first friction layer comprises a flexible material. The friction nanometer generator provides an alternating current stimulation signal for the detection unit under the action of external force; the detection unit outputs the alternating-current stimulation signal to the to-be-detected structure and obtains a feedback signal output by the to-be-detected structure to the processor based on the alternating-current stimulation signal; the processor receives the feedback signal and then generates an image of the to-be-detected structure. Therefore, the imaging system adopts the friction nanometer generator as an alternating current stimulation signal source, and the first friction layer of the friction nanometer generator is made of the flexible friction material, so that the friction nanometer generator can perform more stable friction during working, and the signal-to-noise ratio of an alternating current stimulation signal output by the friction nanometer generator is improved; and the quality of an image obtained by the imaging system is improved.

The invention discloses a real-time self-driven wireless sensor based on a friction nano-generator. The real-time self-driven wireless sensor comprises the friction nano-generator, a discharging device, a sliding capacitive displacement sensor, an inductance coil and a receiving circuit, the sliding capacitive displacement sensor and the inductance coil form a parallel LC resonance circuit, and the friction nano generator supplies power to the LC resonance circuit through the discharge device; the sliding capacitive displacement sensor comprises an upper conductive flat plate and a lower conductive flat plate which are oppositely arranged, and at least one dielectric material layer located between the upper conductive flat plate and the lower conductive flat plate; the upper conductive flat plate is connected with a to-be-measured structure, the lower conductive flat plate is connected with the fixed end, and when the two conductive flat plates relatively displace, capacitance formed by the two conductive flat plates changes, so that the resonant frequency of the LC resonant circuit changes, and a mapping relation exists between the resonant frequency and displacement; the LC resonance circuit wirelessly transmits a resonance signal carrying displacement information, and the receiving circuit receives the resonance signal and analyzes the frequency to obtain the displacement information.

This invention relates to a dual-mode polycaprolactone (PCL) building energy-saving film and its preparation method. The dual-mode PCL building energy-saving film of this invention uses a temperature-sensitive PCL and hydrogel composite layer as the outer layer, and adds VO2-based materials. It can automatically reflect near-infrared light during high summer temperatures and automatically project sunlight during low winter temperatures; it requires no external power supply and is purely passively regulated. Furthermore, a PCL-based triboelectric nanogenerator array serves as the middle layer, which can collect mechanical energy from the building surface environment to power low-power sensors within the building, and can also connect surplus energy to the grid or store it. The transparent PCL and nanocellulose composite layer provides better mechanical support and is easy to install.

The invention discloses a friction nanometer generator. The friction nano-generator comprises a magnetic square vibrator, which is used for generating micro-amplitude vibration in a low-intensity magnetic field environment; the stator electrode and the stator electrode electrification layer and the mover electrode and the mover electrode electrification layer are used for forming a frictional electric contact-separation process; the spring structure is used for connecting the magnetic square vibrator with the mover electrode and the mover electrode electrification layer so as to amplify micro-amplitude vibration to an amplitude sufficient to generate a triboelectric effect; the fixing bracket is used for supporting and fixing the stator electrode and the stator electrode electrification layer and is connected with the spring structure; and the circuit module is used for processing the electric energy generated by the friction nano-generator, so that the friction nano-generator is suitable for energy storage and load driving. According to the invention, the technical problem of low energy power supply efficiency easily caused by insensitive response to complex magnetic field distribution and unstable energy output of a friction nanometer generator in a weak magnetic field environment in the prior art is solved.

The application discloses a kind of power generation systems based on friction nanogenerator, including photo-thermal power generation system, heat storage system and friction nanogenerator component.This system is a kind of comprehensive power generation system that TENG wind power generation system is combined with photo-thermal power generation system, the application will large-area TENG power generation system be arranged in solar photo-thermal power station reflector back with array distribution, saves the support part investment of TENG power generation system.Meanwhile, the electric energy of TENG power generation is directly converted into heat energy storage and is stored in the molten salt energy storage system matched with photo-thermal, realizes the energy storage function of wind power generation, and does not need to increase energy storage investment, saves the investment of downstream power transmission and transformation equipment, inverter and other equipment equipped with TENG power generation system, finally, due to the energy storage of TENG power generation system contribution, mirror field area of photo-thermal power generation system can be reduced, and the investment of photo-thermal power station itself will be reduced.

The utility model provides an output energy management circuit for a friction nano-generator. The output energy management circuit comprises a commutator circuit and an energy storage sub-circuit which are connected with the friction nano-generator. The output end of the commutator circuit comprises a first output end and a second output end; the energy storage sub-circuit comprises a first capacitor, a second capacitor, a first diode, an inductor, a selective switch and a breakdown device; two ends of the first capacitor are electrically connected with the first output end and the second output end respectively; the selective switch comprises a fixed end, a first connecting end and a second connecting end, the cathode of the first diode is electrically connected with the fixed end, and the anode of the first diode is electrically connected with the first connecting end through the first output end, the second capacitor and the inductor in sequence and is electrically connected with the second connecting end through the first output end, the first capacitor, the second output end and the breakdown device; different output modes are provided by switching the connection between the fixed end and the first connecting end and the connection between the fixed end and the second connecting end. By arranging the circuit, a continuous and stable power supply can be provided for the load.

Provided herein is a triboelectric nanogenerator comprising a substrate layer; an electrode layer; and a tribolayer; wherein the electrode layer and the tribolayer are bonded to each other by hydrogen bonds. Also provided herein is a biopolymer-based triboelectric nanogenerator, comprising a first component having a positive tribolayer; and a second component having a negative tribolayer, wherein each of the first component and the second component comprise a substrate layer; an electrode layer; and a tribolayer; wherein the electrode layer and the tribolayer of the first component are bonded by hydrogen bonds. Further provided herein is a method of making a biopolymer-based triboelectric nanogenerator.

The application provides a floating breakwater integrated with a friction nanogenerator, a semi-cylindrical box-type breakwater, and a plurality of power generation units composed of an arc-shaped cavity, a PTFE friction rod and a metal electrode group in the box-type breakwater, wherein each power generation unit can supply power to an external load through an external power transmission line connected with the metal electrode group. The application has simple and stable structure, low construction cost, can collect low-frequency wave energy, can be arranged in offshore sea area, can provide effective protection for the marine platform arranged in the sea area, and can supply power for the marine platform, and can meet the power required for production and life.

The invention discloses a self-driven bionic vision-touch fusion sensor array and a preparation method thereof, and relates to the technical field of bionic intelligent perception, and the sensor array comprises a flexible substrate and at least one sensing unit. The flexible substrate comprises a first flexible substrate and a second flexible substrate which are oppositely arranged in a spaced mode through an elastic medium. The sensing unit is integrated with a photoelectric synapse transistor and a friction nano generator; the photoelectric synapse transistor comprises a photosensitive semiconductor layer, a source electrode, a drain electrode and a gate dielectric layer covering the photosensitive semiconductor layer, the source electrode and the drain electrode; a friction layer of the friction nanometer generator is arranged on the second flexible substrate and is opposite to the gate dielectric layer. And the gate dielectric layer is also used as a charge storage layer of the friction nano generator. Self-driven tactile perception is achieved through contact-separation of the friction layer and the gate dielectric layer, visual perception is achieved through light response of the photosensitive semiconductor, and synaptic signals with enhanced fusion are generated through the synergistic effect of the two kinds of stimulation on a single interface.

This invention discloses a performance simulation processing method and system for triboelectric nanogenerators. The method involves collecting physical parameter data sets and structural parameter data sets of the triboelectric nanogenerator device; defining material regions, motion boundaries, and load interfaces in the three-dimensional geometric model of the triboelectric nanogenerator; setting external load parameter data sets and environmental frequency data sets as coupling boundary conditions in a multiphysics coupling model; performing finite element numerical simulation to obtain output characteristic data sets, generating key parameter data subsets; constructing a multi-objective optimization model based on the key parameter data subsets and output characteristic data sets, and setting optimization objective weights and constraints; obtaining an optimized structural parameter data set; updating the optimized structural parameter data set to the three-dimensional geometric model of the triboelectric nanogenerator, and performing judgments until the convergence criterion is met. This invention can significantly improve the targeting of structural design and the optimization convergence efficiency.

This invention provides a multilayer polarization-enhanced liquid-solid contact separation triboelectric nanogenerator structure, comprising, from bottom to top: a first electrode layer, a polarization-enhancing dielectric layer, a triboelectric layer, a second electrode layer, and a surface nanoparticle modification layer. Both the first and second electrode layers are made of copper foil and are used to collect charges generated by electrostatic induction. The polarization-enhancing dielectric layer is a PVDF thin film, used to enhance the interfacial charge storage capacity and electric field coupling strength, thereby enhancing the electrostatic induction effect and significantly improving the device's output voltage and current. The triboelectric layer is a FEP thin film, which can acquire electrons upon contact with the droplet. The surface nanoparticle modification layer is composed of PTFE nanoparticles, which adhere to the FEP thin film, further increasing the surface triboelectric charge density and thus improving the output voltage. This invention, through liquid-solid contact electrification and electrostatic induction mechanisms, can efficiently convert the mechanical energy of rainwater into electrical energy to provide power for low-power sensors in rainfall detection.

The utility model provides a self-powered vibration sensor based on a friction nanometer generator, and the sensor comprises a vibration sensor body which comprises a housing; the sleeve is arranged on the shell in a sleeving manner, and a mounting cavity is defined between the sleeve and the shell; the friction nanometer generator is arranged in the mounting cavity, the friction nanometer generator comprises a first dielectric film, a second dielectric film and a moving assembly, the second dielectric film is arranged on the shell, the moving assembly comprises a lantern ring and an elastic piece, the lantern ring movably sleeves the shell, the first dielectric film is arranged on the lantern ring and is in contact fit with the second dielectric film, and the elastic piece is arranged on the first dielectric film. The two ends of the elastic piece are connected to the lantern ring and the sleeve respectively. According to the self-powered vibration sensor based on the friction nanometer generator, the structure of the friction nanometer generator is simple, the friction nanometer generator can adjust the power generation friction area according to the vibration amplitude of a product tested by the vibration sensor, and the power generation amount of the friction nanometer generator can be improved.

The invention relates to the technical field of nanometer power generation, in particular to a double-layer composite electrode film for a self-powered marine antifouling system, a friction nanometer generator and a preparation method of the friction nanometer generator. The double-layer composite electrode membrane comprises a PVA / SA / UIO-66 layer and a PVA / MXene layer which are compounded, wherein the weight ratio of PVA, SA and UIO-66 in the PVA / SA / UIO-66 layer is (40-60): (2-3): 1, and the weight ratio of PVA to MXene in the PVA / MXene layer is (40-60): 1. According to the double-layer composite electrode film, the high porosity and the high specific surface area of the UIO-66 are utilized to promote the transfer of triboelectric charges and improve the charge density, so that more inductive charges are generated, and the triboelectric performance is improved.

The invention discloses an automobile tire deformation induced power generation device which comprises a tire, three power generation assemblies are installed in the tire, each power generation assembly comprises a nano-generator, clamping grooves are formed in the two sides of each nano-generator, two fixing blocks are fixedly connected to the inner wall of the tire, metal shells are fixed to the two fixing blocks, and the metal shells are fixedly connected to the inner wall of the tire. A sliding block capable of resetting is connected in the metal shell in a sliding mode, a wedge-shaped groove is formed in the upper end of the sliding block, a wedge-shaped block is connected in the wedge-shaped groove in a sliding mode, a through groove is formed in the fixing block and the metal shell in a penetrating mode, the through groove is communicated with the metal shell, and the wedge-shaped block is connected in the through groove in a sliding mode in a resetting mode. A clamping block is fixedly connected to the sliding block and is connected into the clamping groove in a sliding mode. The nanometer generator can be mounted and dismounted by pressing the pressing block, the operation is simple and convenient, the clamping groove and the clamping block can move relatively, and the clamping block cannot be separated from the clamping groove.

The invention discloses a bioactive friction nano-generator based on a loofah sponge skeleton and a preparation method and application thereof, and the bioactive friction nano-generator based on the loofah sponge skeleton comprises the loofah sponge skeleton and composite hydrogel wrapping the surface of the loofah sponge skeleton, the composite hydrogel comprises the following raw materials: a high-molecular polymer, liquid metal, lignosulfonate and an antioxidant. The bioactive friction nano-generator based on the loofah sponge skeleton provided by the invention has flexibility, durability, high output performance, stability, high toughness, antibacterial property and oxidation resistance.

The application relates to a preparation method of a self-powered heating and warm-keeping knitted fabric, and relates to the field of thermal textile materials. The self-powered heating and warm-keeping knitted fabric is prepared by doubling electrically-conductive cotton yarn and thermal nylon yarn, and weaving a double-reverse air layer double-layer knitted fabric through an arbitrary commercial flat knitting machine; the electrically-conductive cotton yarn is cotton yarn immersed with silver nanowires, and the thermal nylon yarn is a nylon filament yarn. In this case, based on the principle of a friction nanogenerator, mechanical energy is converted into electrical energy, and then efficient electrothermal conversion is realized by using the metal characteristics, that is, the unique structure of the knitted fabric is used to improve the conversion efficiency among mechanical energy, electrical energy and thermal energy, and the double-layer knitted fabric itself has the warm-keeping performance, so that self-powered heating and warm-keeping are realized.