635 results about "Energy conversion efficiency" patented technology

The invention provides a compound uniform-load and shunt load shedding type planetary gear gearbox with a face gear. The compound uniform-load and shunt load shedding type planetary gear gearbox comprises an input planet carrier integrated assembly, a first-stage compound uniform-load planet row, an inter-stage flexible connection structure, a second-stage planet row and a face gear steering output assembly. The input planet carrier integrated assembly is connected with the first-stage compound uniform-load planet row, the inter-stage flexible connection structure is arranged between the first-stage compound uniform-load planet row and the second-stage planet row, and a first-stage floating sun gear in the first-stage compound uniform-load planet row and the main shaft planet carrier structure are coaxially arranged. The first-stage floating sun gear is installed in a floatable mode through a first-stage sun gear supporting shaft, self-adjustment can be achieved in the radial direction and the axial direction, and the first-stage floating sun gear is meshed with the first planet gear and the second planet gear in a double-side mode. The energy conversion efficiency can be improved, uneven load distribution is improved, and the system integration degree is improved.

The invention discloses an isolation type split-phase inverter circuit and a control method thereof. The isolation type split-phase inverter circuit comprises an isolation DC / DC module circuit and a power frequency rectification module circuit. The isolation DC / DC module circuit comprises an input-side full bridge, a three-end transformer and two output-side circuits, an input-side winding of the three-end transformer is connected with a midpoint of a bridge arm of the input-side full bridge, and the input-side full bridge is connected with a filter capacitor C1 in parallel; two output side windings of the three-end transformer are respectively connected with corresponding output circuits through a resonance network circuit, the two output circuits are connected to a power frequency rectification module circuit through filter capacitors C4 and C5, and the negative electrode of the first output circuit and the positive electrode of the second output circuit are connected to form an interface N; the power frequency rectification module circuit comprises a rectification full-bridge circuit, and an interface L1 and an interface L2 are obtained after rectification. Through cooperative control of direct transmission of integrated topology and voltage signals, a complex parameter matching algorithm is not needed, breakthrough in structure simplification, energy conversion efficiency, control convenience, cost control and safety is achieved, and the method is suitable for various power conversion scenes.

The invention relates to the technical field of resource scheduling, and provides an industrial and commercial energy storage power resource scheduling method and system, and the method comprises the steps: obtaining the operation parameters of a power conversion system and the operation parameters of an energy storage battery; according to the operation parameters, internal assembly stress and energy conversion efficiency deviation are evaluated, and the accelerated attenuation risk is evaluated; internal component stress, energy conversion efficiency deviation and accelerated attenuation risk are converted into virtual aging cost; adjusting the available power upper limit according to the internal component stress, the energy conversion efficiency deviation and the accelerated attenuation risk; subtracting the virtual aging cost from the economic benefit in the preset date to obtain a net benefit, and generating a power scheduling instruction under the constraint of the available power upper limit by taking the net benefit maximization as a target; and after the power scheduling instruction is executed, feeding back the actual execution condition corresponding to the power scheduling instruction, and correcting the calculation parameters. The method has the effect of improving the accuracy and economical efficiency of the industrial and commercial energy storage system.

The invention relates to the technical field of feed efficiency optimization, in particular to a feed efficiency optimization system based on a growth model, and the system comprises a data collection unit which is used for collecting and associating individual identities, individual weight data, time-phased feed intake data, environment data and environment forecast data; the model calibration unit is used for calibrating individual energy conversion efficiency parameters, generating an environment dynamic correction factor by using the environment data and generating a group classification label based on historical individual performance data; and the decision and execution unit operates a double-cycle cooperation mechanism based on pre-judgment and execution. By dynamically calibrating the individual energy conversion efficiency and combining with the environment forecast, real-time calculation and differentiated feeding regulation and control of the individual energy demand can be realized.

The invention discloses a self-adaptive charging and discharging coordination control method and system for an energy storage battery, and relates to the technical field of charging and discharging control of the energy storage battery. The method comprises the following steps: correcting a maximum allowable current based on a real-time collected SOC and a preset battery low charge threshold, a battery high charge threshold, a reference coefficient, a first attenuation coefficient and a second attenuation coefficient to obtain an inner loop current amplitude limit; judging whether the current system reaches current saturation or voltage saturation, and marking a corresponding saturation mark; calculating a saturation difference value and a saturation direction angle based on the current value controlled and output by the inner ring and the current value actually output by the inner ring; according to the saturation mark, the saturation difference value and the inner loop current amplitude limit are used for correcting the preset outer layer reference power, the corrected reference power is obtained, the integration gain in the preset integration link is corrected, and the saturation state is relieved; stability and reliability of charging and discharging control of the energy storage system are guaranteed, power control precision is improved, service life of equipment is prolonged, and energy conversion efficiency is improved.

The invention provides a tritium radiation volt isotope battery. The tritium radiation volt isotope battery comprises a shell and a stacking structure, the shell is provided with an accommodating cavity; the stacked structure is arranged in the containing cavity and comprises a positive pole piece, a semiconductor transduction layer and a negative pole piece which are arranged in a stacked mode, the semiconductor transduction layer is arranged to be an array formed by columnar nano particles, liquid tritides are distributed on the surfaces of the columnar nano particles, and the liquid tritides comprise all-tritiated N-ethyl carbazole and / or all-tritiated N-ethyl carbazole and / or all-tritiated N-ethyl carbazole and / or all-tritiated N-ethyl carbazole and / or all-tritiated N-ethyl carbazole and / or all-tritiated N-ethyl carbazole. And part of tritiated N-ethyl carbazole. The radiation volt isotope battery has improved energy conversion efficiency.

The invention belongs to the technical field related to medical robots, and discloses a rigid-flexible coupling pneumatic humanoid dexterous finger and a dexterous hand. The dexterous finger comprises a sectional corrugated pipe actuator, a rigid cover plate, a rigid bottom plate, a flexible finger pulp patch and a one-way stretchable fabric; a cooperative structure of rigid supporting, flexible driving and contact adaptation is formed through a preset assembly relation; by designing the wave number of the corrugated pipe at each joint of the pneumatic dexterous finger, the bending proportion of each joint is ensured to accord with the human hand movement rule; the one-way stretchable fabric can restrain ineffective upheaval at the joints, and the energy conversion efficiency is improved. The dexterous hand can integrate five anthropomorphic-size dexterous fingers, and the palm notch angle, the thumb turning direction angle and the flexible palm patch are all engraved with the physiological characteristics and structure of the hand of the human body. According to the pneumatic dexterous hand, personification of the pneumatic dexterous hand in appearance and movement modes is achieved, flexibility and bearing stability are both considered, and the pneumatic dexterous hand can meet the requirements of multiple scenes such as medical care and industrial assembly.

The invention provides an energy management method, electronic equipment and a vehicle, the method is applied to the technical field of vehicle energy management, and the method comprises the following steps: when the working mode of the vehicle is a series mode, discrete processing is carried out on engine demand power to obtain M engine initial discrete powers; determining M discrete parameter sets according to the M initial discrete powers of the engine; according to the M discrete parameter sets, target working parameters of the engine are determined, so that the equivalent fuel consumption is minimum; and controlling the engine to operate according to the target working parameters. According to the method, optimization can be carried out by narrowing the discrete range, and the optimization workload can be reduced. Besides, by pre-calculating the basic required power meeting the current working condition, the optimal parameter can be highly matched with the current vehicle working condition, the accuracy of the optimization result is ensured, the fuel economy of the vehicle is improved, the fuel loss of the engine is reduced, and the energy distribution and energy conversion efficiency of the vehicle are optimized.

The invention discloses a distributed new energy monitoring method and system based on machine vision, and the method comprises the steps: obtaining real-time image data through an image collection device, combining an abnormality detection algorithm and a posture detection algorithm, positioning equipment abnormality, evaluating the energy conversion efficiency, and fusing a light and shadow distribution analysis result to judge a potential abnormal region. And for an abnormal region, extracting operation data from the edge calculation unit, integrating image analysis and operation parameters by adopting a multi-source data fusion algorithm, generating a global state evaluation index, and triggering an early warning and maintenance process based on the global state evaluation index. Through multi-dimensional data fusion and intelligent algorithm integration, the operation reliability and maintenance efficiency of renewable energy facilities are remarkably improved, and important technical support is provided for sustainable development of green energy.

The invention discloses a method for efficiently generating high-brightness gamma radiation, and belongs to the technical field of radiation. A relativistic electron beam is injected into the porous microstructure foam target material, and high-brightness gamma ray radiation is generated. According to the method, the used device is simple, only the single relativistic electron beam and the porous microstructure foam target material are needed to interact, compared with a traditional uniform-density solid material, the energy conversion efficiency in the interaction process of the electron beam and a substance can be remarkably improved, and the energy conversion efficiency can be remarkably improved through the effective constraint effect of a high-intensity magnetic field. And the problems of low energy conversion rate, low light source brightness, poor radiation directivity, complex device or difficulty in experiment implementation and the like of the existing high-energy gamma ray radiation source are solved.

The invention discloses a self-adaptive configuration method for an optimal working point of a concrete hidden crack ultrasonic thermal excitation system, and the method comprises the steps: collecting multi-physical field response data of the system under different parameter combinations through constructing a parameter space containing initial coupling pressure and working frequency; constructing an excitation efficiency evaluation index based on the active power response or thermal image temperature difference of the transducer, and locking an initial optimal working point by identifying extreme value features of an index response function; performing second-order sensitivity analysis on the optimal point neighborhood by using a Hessian matrix, and constructing a tolerance elliptic model to quantify a parameter control boundary; and meanwhile, frequency and pressure drift are monitored in real time based on a power-phase decoupling mechanism of voltage and current. According to the method, the optimal working parameters can be adaptively matched for loading devices with different rigidities, the engineering tolerance is scientifically set, and the energy conversion efficiency and the detection robustness of the ultrasonic thermal excitation system are improved.

The invention relates to the technical field of photovoltaic power generation control, in particular to a rapid maximum power point tracking method based on an optimization algorithm and a variable step size strategy. According to the method, an improved intelligent optimization algorithm based on biological heuristic is adopted, and the performance is optimized through an adaptive weight factor and a dynamic search strategy; acquiring a current maximum power point by utilizing a self-adaptive step length adjustment strategy based on a power change rate and combining a momentum factor and a step length reset mechanism; identifying a global optimal region through second derivative information of a power-voltage curve and a sliding window technology; and a state evaluator based on fuzzy logic automatically selects an optimal tracking mode according to the illumination change rate and the power fluctuation amplitude. According to the method, the maximum power point of the photovoltaic system can be quickly and accurately tracked under complex and changeable environmental conditions, and the energy conversion efficiency is improved.

The invention relates to a dielectric elastomer-piezoelectric composite multi-source energy collection device for a non-intrusive electric field sensor, and belongs to the technical field of power system self-powered sensors. The device comprises a base, a dielectric elastomer unit, a piezoelectric cantilever beam, a mass block and a rectification energy storage circuit. The dielectric elastomer deforms under the action of an alternating electric field, the piezoelectric cantilever beam is driven through coupling to generate mechanical vibration, and the piezoelectric layer further converts mechanical energy into electric energy to be output. The resonant frequency of the system is adjusted by setting the mass block, so that the resonant frequency is matched with the external electric field frequency or the environment vibration frequency, and the energy conversion efficiency is optimized. The device can collect external electric field energy in a non-intrusive mode and provide a stable power supply required by a low-power-consumption sensor. The device is compact in structure, high in sensitivity and suitable for electric field monitoring in scenes such as ultrahigh-voltage power transmission lines and transformer substations, and provides reliable energy support for self-powered sensors of power equipment.

The invention relates to the technical field of power electronics, in particular to a portable load adaptive bidirectional charging and discharging circuit module. The module comprises a battery and a load port. The first half-bridge is composed of a gallium nitride switch, and the second half-bridge is composed of a silicon-based field effect transistor; a main winding of the coupling inductor is connected with two half-bridge switch nodes, and a secondary winding outputs induced voltage to provide bias power supply through rectification and filtering; an auxiliary resonant branch comprising an auxiliary switch and a resonant capacitor is connected in parallel to two ends of the switch, and the starting time sequence of the auxiliary switch is ahead of the first gallium nitride switch; the control unit determines a direct current and a high-frequency ripple component according to the shunt resistor and the secondary winding signal, and generates a PWM signal in combination with the port voltage to control the on and off of all the switches. According to the scheme of the invention, self-bias power supply and high-precision composite current detection are realized, the switching loss is reduced, and the energy conversion efficiency is improved.

The invention discloses a preparation method of salt crystallization prevention aerogel with a vertical microchannel structure. The preparation method comprises the following steps: step 1, preparing a PPy-PDA composite photo-thermal material; step 2, preparing a PVA / HPC solution; step 3, preparation of a PVA / HPC coated PPy-PDA precursor solution; and step 4, preparing the PVA / HPC coated PPy-PDA composite aerogel with the vertical micro-channel structure. The salt crystallization prevention aerogel with a vertical micro-channel structure is prepared by utilizing a directional freezing and chemical cross-linking technology, the salt crystallization prevention aerogel has excellent photo-thermal response capability and energy conversion efficiency, and the vertically arranged micro-channel structure can promote rapid directional transportation of moisture and salt ions and inhibit salt accumulation and crystallization; meanwhile, the chemical crosslinking strategy enhances the mechanical stability and durability of the gel network. The preparation process is controllable, and the material is green and environment-friendly and can be applied to the field of solar interface evaporation desalination of high-salinity wastewater.

The invention relates to a Janus type heterojunction material as well as a calculation method and application of the Janus type heterojunction material in photocatalytic water decomposition, and belongs to the technical field of heterojunction materials. The upper layer of the material is a 1T-phase GeSe single layer, the lower layer of the material is a 1T-phase SnSSe single layer, and the material is divided into two configurations of GeSe / SSnSe and GeSe / SeSnS according to interface atom arrangement. Modeling and simulation calculation are carried out through VESTA and VASP software, and the result shows that the material has the direct Z-type heterojunction characteristic, photon-generated carrier separation can be effectively promoted, the light absorption range is widened, the photocatalytic oxidation reduction capacity and the solar energy-hydrogen energy conversion efficiency are remarkably improved, and a new strategy is provided for developing efficient photocatalysts.

The invention relates to the technical field of all-vanadium redox flow batteries, in particular to a high-oxidation-resistance polybenzimidazole proton exchange membrane as well as a preparation method and application thereof. According to the proton exchange membrane, different polymeric monomers with high oxidation resistance are mixed in the reaction process to prepare a polybenzimidazole block copolymer, and after the membrane formed by the polybenzimidazole block copolymer is soaked in high-concentration acid liquor, rapid and selective conduction of protons is achieved. Aiming at the problems that in the application process of poly (2, 2 '-(p-oxybiphenyl)-5, 5'-benzimidazole) in an all-vanadium redox flow battery, a polymer skeleton is easily oxidized by VO < 2 + > ions, so that the battery capacity is attenuated, and the energy conversion efficiency is continuously reduced, the preparation method comprises the following steps: synthesizing a high-oxidation-resistance polybenzimidazole block copolymer main chain; the microphase separation structure of the polybenzimidazole block copolymer membrane can be effectively improved, a rapid ion channel is constructed in the polybenzimidazole block copolymer membrane, and meanwhile, the utilization rate of an acid solution is increased.

The invention provides an energy management method, electronic equipment and a vehicle, the method is applied to the technical field of vehicle energy management, and the method comprises the steps that in a direct drive mode, the maximum engine torque is determined according to the battery electric quantity difference value and the engine rotating speed; m engine target discrete torques are obtained based on the maximum engine torque, the engine rotating speed and the discrete engine demand torque; m discrete parameter sets are determined according to the M engine target discrete torques and the engine rotating speed; and target working parameters of the engine are determined. The maximum torque limit value of the engine is determined by combining the battery capacity, and balance between the output torque and the capacity of the engine is guaranteed. In addition, the basic demand torque is determined firstly, and then a small amount of local discretization is performed to obtain the optimal parameter of the engine, so that the optimization workload is reduced, the optimal parameter is matched with the current vehicle working condition, the optimization accuracy is ensured, the fuel economy of the vehicle is improved, the fuel loss of the engine is reduced, and the energy distribution and energy conversion efficiency of the vehicle are optimized.

This application relates to optoelectronic devices and their fabrication methods, as well as electrical devices and power generation devices. The optoelectronic device includes a perovskite layer comprising perovskite grains. The crystalline phases of the perovskite grains include cubic and non-cubic phases; the cubic phase accounts for more than or equal to 97% of the mass of the perovskite layer; the non-cubic phase includes at least one of tetragonal, orthorhombic, and other phases; the other phases account for less than or equal to 5% of the mass of the non-cubic phase; the tetragonal phase accounts for a higher mass of the non-cubic phase than the orthorhombic phase; and the dielectric constant of the perovskite layer is greater than or equal to 5. This optoelectronic device exhibits high energy conversion efficiency.

The application discloses a scale rod type mobile counterweight gravity power generation device and belongs to the technical field of power generation equipment. The system comprises a building frame, a plurality of groups of counterweight devices, a bottom locking device, a top locking device, a transposition driving mechanism, a transmission power generation device and a central control system. Each group of counterweight devices comprises left and right counterweight boxes and horizontally movable counterweight blocks, and the counterweight boxes slide along vertical guide rails in lifting pits. The main shaft of the transmission power generation device is connected with the left and right counterweight blocks through traction ropes, and the main shaft drives a generator through a speed increaser. The system operation logic is as follows: after the central control system controls the locking device to lock the counterweight boxes, the transposition driving mechanism drives the counterweight blocks to horizontally move to change the torque at extremely low energy consumption, and after being unlocked, the top counterweight box falls to drive the main shaft to rotate and generate power. A plurality of groups of counterweight devices are operated in turn under staggered peak time control, so that continuous and stable power generation is realized. The application can establish a torque difference through static horizontal transposition, has high energy conversion efficiency and can be stably operated in a large tonnage.

The application discloses a high-torque electromagnetic energy engine based on a linear motor and belongs to the technical field of engines, which comprises a base for fixing the whole equipment to work, a driving mechanism installed on the top of the base and used for providing power for the whole equipment, two fixing plates connected with the surface of the base at the bottom, and an outer shell connected with the top of the fixing plate through bolts. The application has the advantages that the innovative mechanical structure design and electromagnetic energy conversion mechanism can efficiently convert the electromagnetic energy of the linear motor into high-torque rotary power, the high thrust characteristic of the linear motor can output significantly increased torque under smaller power input, the energy conversion efficiency is significantly improved, and the energy consumption is reduced. The innovative design not only makes the engine more energy-saving during operation, but also can meet the strict power requirements of various devices requiring large-torque output.

The invention discloses an omni-directional ocean current energy capturing device based on a friction nanometer generator. The omni-directional ocean current energy capturing device comprises a device shell, a base, an elastic supporting rod and a plurality of friction nanometer power generation units. A closed cavity is formed in the device shell; the two ends of the elastic supporting rod are fixedly connected with the base and the device shell. The multiple friction nanometer power generation units are evenly distributed on the inner wall of the closed cavity of the device shell in the circumferential direction. When the energy capturing device is placed in water, the device shell is suspended in the water under the traction of the base and the elastic supporting rod, and the device shell swings in a reciprocating mode under the traction of the elastic supporting rod under the driving of water flow, so that the friction layer and the first electrode layer make contact with each other in a reciprocating mode and are separated from each other. The omni-directional ocean current energy capturing device based on the friction nano-generator disclosed by the invention has the advantages of omni-directivity, simple and reliable structure and high energy conversion efficiency, and is particularly suitable for capturing and converting low-frequency and multi-directional ocean current energy in an ocean environment.

A deep-sea platform energy self-supply apparatus and a control method therefor. The apparatus comprises a work platform (1) of the deep-sea platform, and further comprises: pontoons (2) mounted at the bottom of the work platform (1); a wave energy piezoelectric assembly (3) which is provided at the bottom of the work platform (1), moves around the periphery of the pontoons (2), and can consume wave energy and convert wave energy into electrical energy; and a marine current energy piezoelectric assembly (4) provided at the bottoms of the pontoons and capable of consuming marine current energy and converting marine current energy into electrical energy. The angles and heights of wave energy piezoelectric plates (3) and marine current energy piezoelectric plates (4) are adjustable, which can effectively improve the energy conversion efficiency and consume fluid kinetic energy during the conversion of fluid kinetic energy into electrical energy such that the amplitude of waves decreases as fluid kinetic energy decreases, thereby implementing a wave dissipation effect and facilitating the improvement of the stability of the deep-sea platform.

The invention discloses a photovoltaic module installation method based on building surface characteristics, and belongs to the technical field of new energy and building integration. According to the method, a comprehensive characteristic model including curvature, material and thermal performance is constructed by fusing three-dimensional laser scanning and infrared thermal imaging data; based on a model, designing a mounting base adaptive to a curved surface or a plane, optimizing component layout by using a building information modeling technology, and monitoring mounting stress in real time through a distributed sensor network; during fixing, a heat-conducting gasket is laid, an adjustable bolt is used, and a seam is sealed; a flexible conductive band and a modular junction box are adopted for electrical connection; and finally carrying out illumination response, wind resistance and thermal stability tests. According to the invention, comprehensive perception and self-adaptive installation of building surface characteristics are realized, and the installation precision, the structural safety and the energy conversion efficiency are improved.

The invention discloses a rocker arm connecting rod type wave power generation device, and relates to the technical field of ocean energy utilization. The device comprises a floater assembly, a first-stage wave energy capturing mechanism, a power generation main shaft and a two-way driving mechanism, stable support is provided through a semi-submersible platform, sea wave energy is captured through a floater and converted into vertical motion, the vertical motion is converted into one-way rotating motion of the main shaft through the first-stage wave energy capturing mechanism, and the power generation main shaft is driven by the two-way driving mechanism. And finally, power generation is realized through the speed increasing box generator assembly. The overrun clutch is adopted in the device, it is ensured that the floater can drive the main shaft to rotate when moving up and down, the energy conversion efficiency is improved, and the device is suitable for wave energy collection and power generation in various offshore and pelagic wave environments.

The utility model discloses an electromagnetic power generation device based on road vibration energy, which belongs to the technical field of energy recovery and reutilization, and comprises an energy input module which comprises a partition plate and a ball screw, a nut of the ball screw is fixedly connected with the partition plate, an elastic element is propped against the lower part of the partition plate along the axial direction of the ball screw, and an upper cover plate is buckled at the top of the partition plate; an energy conversion module; comprising a lower cylinder, a rotor is arranged in the center of the lower cylinder, a plurality of magnets are fixedly connected to the outer side of the rotor in the circumferential direction, and a plurality of coils are fixedly connected in the lower cylinder around the rotor; the motion transmission module comprises a middle barrel, and one end, away from the partition plate, of the elastic element is fixedly connected with the top surface of the middle barrel; a conversion transmission assembly is arranged in the middle barrel, converts irregular rotation of the ball screw into unidirectional rotation and transmits the unidirectional rotation to the rotor. Irregular vibration is converted into stable one-way rotation, the energy conversion efficiency is improved, and the reliability and durability of the device are enhanced.

The utility model discloses an LED light source structure comprising a substrate, the substrate is connected with a light emitting unit and a first light blocking ring surrounding the outer side of the light emitting unit, and the light emitting unit comprises a purple light LED wafer, a blue light LED wafer, an ultraviolet light LED wafer, a red light generating structure and an infrared light generating structure. The surface of the blue light LED wafer is provided with first fluorescent powder or first fluorescent conversion glue capable of converting part of blue light into yellow light, purple light, blue light, yellow light, ultraviolet light, red light and infrared light are integrated, the light source structure can generate wider spectral distribution, and the color quality and the color rendering index of light are improved. The lighting quality can be improved, and the requirements of specific application fields such as plant growth lamps, special lighting in medical equipment and the like can be met. Through the design of the multi-wavelength LED wafer combination, spectral components are controlled more accurately, so that the energy conversion efficiency is optimized, unnecessary energy loss is reduced, higher luminous efficiency is achieved, and meanwhile energy consumption is reduced.

The invention discloses a bidirectional DC-AC converter control method considering a soft switching condition and current optimization. According to the invention, the switching loss of the converter is reduced by optimizing the phase shift angle and the switching condition of the converter, and the energy transmission efficiency is optimized by minimizing the effective value of the current, so that the performance of the whole sodium battery energy storage system is improved. Specifically, based on the relation between the excitation inductance Lm and the current effective value Iprms, the phase shift angle of the converter is accurately controlled, the current transmission efficiency is optimized, and it is ensured that the zero-voltage switching condition of a primary side bridge arm and a secondary side bridge arm can be achieved in the working process, so that the loss of the converter is remarkably reduced, and the energy conversion efficiency is improved.

This invention relates to the field of clean energy power generation technology, and proposes a three-source coupled synergistic power generation device based on hydropower, gravity, and kinetic energy. The device includes a water storage tank, a wheel, an upper water tank, an upper water baffle, a closed-loop water tank pump system, a main shaft, counterweight grooves, counterweight blocks, high-pressure spherical bearings, buffer springs, and a dual-start transmission power generation assembly. The wheel diameter is unlimited and can be arbitrarily enlarged according to actual power demand. The wheel size is directly proportional to the output torque and power generation. The upper water tank is circularly arranged on the wheel. The closed-loop water tank pump system is installed on the upper side of the water storage tank. Multiple counterweight grooves are arranged in a circular array on both sides of the top water tank of the wheel. Multiple high-pressure spherical bearings are respectively installed at the bottom of each counterweight block. Multiple buffer springs are symmetrically installed on the upper and lower sides of each counterweight groove. This technical solution solves the problems of limited power output, single starting method, low energy conversion efficiency, and inability to operate with zero carbon emissions in traditional power generation equipment.

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.