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100results about How to "Improve electromechanical conversion efficiency" patented technology
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High-frequency ultrasonic transducer made of piezoelectric monocrystalline composite material as well as manufacturing method and application thereof
ActiveCN101524682AIncreased acoustic impedanceImprove electromechanical conversion efficiencyUltrasonic/sonic/infrasonic diagnosticsPiezoelectric/electrostrictive device manufacture/assemblySonificationUltrasonic sensor
The invention discloses a high-frequency ultrasonic transducer made of a piezoelectric monocrystalline composite material as well as a manufacturing method and an application thereof. The high-frequency ultrasonic transducer consists of a piezoelectric monocrystalline composite material wafer, a damping backing material, a first matching layer, a second matching layer, a coaxial electrode lead, a coaxial connector and a metal shell, wherein the second matching layer, the first matching layer, the piezoelectric monocrystalline composite material wafer and the damping backing material are bonded together in sequence; and the coaxial electrode lead is introduced from the positive electrode and the negative electrode of the piezoelectric monocrystalline composite material wafer to the coaxial connector which is fixed on the metal shell. The invention provides a method for manufacturing the transducer by matching acoustic characteristic based on a KLM model. The center frequency Fc of the obtained ultrasonic transducer is equal to 14.67MH, the bandwidth Bw can be up to 107 percent and the pulse echo sensitivity Sr can reach -30dB; and the ultrasonic transducer also has very high sensitivity on the premises of high frequency and large bandwidth. The ultrasonic transducer can be used for medical diagnosis, ultrasonic nondestructive detection and precise thickness measurement.
Owner:广州多浦乐电子科技股份有限公司
Micropower passive electronic lock cylinder
InactiveUS8276414B2Simple structureSpeed up the conversion processAnti-theft devicesNon-mechanical controlsMicromotorCam
Owner:LUO SHIFU
Micropower passive electronic lock cylinder
InactiveUS20110067465A1Improve electromechanical conversion efficiencyReduce power consumptionAnti-theft devicesNon-mechanical controlsEngineeringMicromotor
A micropower passive electronic lock cylinder including an immovable cylinder body (3), a rotatable plug (1), and an electronic control circuit part is described. An electronic control circuit board (13) electrically connected with a micromotor (14) and locating switches (15, 16) is arranged in the rotatable plug (1). A lock pin (8), which is controlled by a displacement limiting cam (5) driven by the micromotor (14), moves between the immovable cylinder body (3) and the rotatable plug (1) to release or block the rotatable plug (1).
Owner:LUO SHIFU
Piezoelectric excitation pulled silicon micro-resonant pressure sensor chip and preparation method thereof
ActiveCN109786422AHigh sensitivityHigh quality factorPiezoelectric/electrostrictive device manufacture/assemblySolid-state devicesGlass coverPiezoelectric actuators
The invention provides a piezoelectric excitation pulled silicon micro-resonant pressure sensor chip and a preparation method thereof. The pressure sensor chip mainly comprises a sealed glass cover, aresonator layer, a pressure sensitive film layer, a stress isolation pad, a piezoelectric excitation element and a resistance vibration pick-up element. A composite structure of a pressure sensitivediaphragm and a resonator is adopted. For a second sensitive mode, the resonator layer comprises a resonant beam and a torsion beam. An extension part at one end of two adjacent resonant beams is connected to the same suspended torsion beam, and the other end is connected to a mass block. A coupling beam is arranged in the middle of the mass block. The resonator is connected to an anchor point through a connection point. A pressure guide hole is formed in the stress isolation pad, and the pressure is delivered to the rectangular pressure sensitive diaphragm under the guidance of the pressure guide hole to cause deformation. The deformation is amplified by the anchor point, and delivered to the resonator layer. Piezoelectric actuators and resistive vibration pick-up elements are respectively arranged on the outer surface of the resonant beam and the coupling beam. The piezoelectric actuators and the resistive vibration pick-up elements are connected with an external circuit through leads respectively.
Owner:XI AN JIAOTONG UNIV
Optoacoustic/ultrasonic dual mode endoscope based on miniature piezoelectric ultrasonic transducer arrays
The invention discloses an optoacoustic / ultrasonic dual mode endoscope based on piezoelectric micromachined ultrasonic transducer arrays. The optoacoustic / ultrasonic dual mode endoscope includes a piezoelectric micromachined ultrasonic transducer (PMUT) array probe (2), a PMUT array element (1), an integrated circuit (3), a plane lens (4), a condenser lens (6), an optical fiber coupling collimator (7), a single-mode fiber (8), an optical fiber FC / APC connector (9), an optical fiber (10), a signal line (11) and an housing (12). The optoacoustic / ultrasonic dual mode endoscope is characterized in that, the piezoelectric micromachined ultrasonic transducers are adopted, the transducers and the integrated circuit are good in compatibility during manufacturing process, and the transducers are easy to form an array; transducer arrays are adopted, the endoscope does not need to rotate, the imaging speed is raised, real time imaging is achieved; and the multiple transducer arrays can effectively raise the signal to noise ratio of a signal, deep imaging through focusing and scanning is achieved. The optoacousitc / ultrasonic dual mode endoscope can be widely applied to fields of medical endoscopes and industrial flaw detection, and particularly has great application value in in-vivo scar tissue identification, assessment of damage of ablation of tissue, atherosclerotic degree assessment and the like.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Chiral negative Poisson's ratio structure based on dielectric electroactive polymers
InactiveCN107276449AImprove energy absorptionImprove vibration damping effectNon-rotating vibration suppressionForce measurementMechanical energyHigh-voltage direct current
The invention discloses a chiral negative Poisson's ratio structure based on dielectric electroactive polymers. The structure is formed by a chiral negative Poisson's ratio cell array, and the cells consist of bones and a plurality of tendons. The tendons are made of dielectric electroactive polymers, and are of a sandwich structure, sandwich materials are dielectric elastomers, two sides are flexible electrodes, and the Young's modulus of the bones is larger than that of tendon materials. The flexible electrodes of two sides of the tendons are connected with the positive electrode and the negative electrode of high voltage direct current power supplies, and the voltage and path open-circuit state are adjustable. The chiral negative Poisson's ratio cells are arrayed, and thus the chiral negative Poisson's ratio structure can be formed. Since the mechanical states and electrostatic states of the dielectric electroactive polymers are mutually coupled, mutual conversion between mechanical energy and electric energy can be realized, and functions of structure real-time variability, actuation, energy recovery and sensing of the chiral negative Poisson's ratio structure are realized.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Miniature wind-power piezoelectric generator
InactiveCN102801355ASimple structureReduce volumePiezoelectric/electrostriction/magnetostriction machinesWind motor combinationsElectricityMechanical energy
The invention discloses a miniature wind-power piezoelectric generator, which is simple in structure, high in electromechanical conversion efficiency and large in power density. According to an energy conversion mode, the miniature wind-power piezoelectric generator can be divided into two parts, namely an air-driven turbine mechanism and a piezoelectric generator body, wherein the air-driven turbine mechanism converts air-driven mechanical energy into sustainable and stable rotary mechanical energy; and the piezoelectric generator body converts the rotary mechanical energy generated by the air-driven turbine into electric energy and mainly comprises an impulse wheel plate, an elastic element and a piezoelectric sheet. A working process of the miniature wind-power piezoelectric generator is as follows: the air-driven turbine drives the impulse wheel to rotate under blowing of wind, the impulse wheel plate continuously and periodically impacts a piezoelectric material on the elastic element in the rotation process, and the piezoelectric material suffers from the pressure and converts the impact and deformation into electric energy according to the direct piezoelectric effect of the piezoelectric material. A lead wire is connected to the piezoelectric material and used as an electrode of the generator, and a wire which is led out from one surface of the piezoelectric material, which is in contact with the elastic element, is used as another output electrode of the generator.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Concave hexagonal negative Poisson's ratio structure based on dielectric electroactive polymers
InactiveCN107276451AImprove energy absorptionImprove vibration damping effectPiezoelectric/electrostriction/magnetostriction machinesSandwich boardMechanical energy
The invention discloses a concave hexagonal negative Poisson's ratio structure based on dielectric electroactive polymers. The structure is formed by a concave hexagonal negative Poisson's ratio cell array, and the cells consist of bones (101~104) and tendons (105~106). The tendons are made of dielectric electroactive polymers, and are of a sandwich board structure, sandwich materials are dielectric elastomers, two sides are flexible electrodes, and the Young's modulus of bone materials is larger than that of the tendon materials. The flexible electrodes of upper and lower surfaces of the tendons 105 and 106 are connected with the positive electrode and the negative electrode of high-voltage direct current power supplies 107 and 108 respectively, and the voltage and path open-circuit state are adjustable. The concave hexagonal negative Poisson's ratio cells are arrayed, and thus the concave hexagonal negative Poisson's ratio structure can be formed. Since the mechanical states and electrostatic states of the dielectric electroactive polymers are mutually coupled, mutual conversion between mechanical energy and electric energy can be realized, and functions of structure real-time variability, actuation, energy recovery and sensing of the concave hexagonal negative Poisson's ratio structure are realized.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Double-waveform negative Poisson's ratio structure based on dielectric electroactive polymer
InactiveCN107294421AImprove energy absorptionImprove vibration damping effectPiezoelectric/electrostriction/magnetostriction machinesTime transformationMutual transformation
The invention discloses a double-waveform negative Poisson's ratio structure based on a dielectric electroactive polymer, and the structure consists of a double-waveform negative Poisson's ratio cell array. The cell array consists of waveform muscle tendons (101-105) and bones (106-110). Each muscle tendon is made of the dielectric electroactive polymer, and is of a sandwich board structure which is made of a dielectric elastomer, wherein two sides of the sandwich board structure are respectively provided with a flexible electrode. The Young modulus of the bones is greater than the Young modulus of the tendons. The flexible electrodes on the upper and lower surfaces of the tendons are respectively connected with the positive and negative electrodes of a high-voltage DC power supply 111, and the voltage and on and open-circuit states can be adjusted. The double-waveform negative Poisson's ratio cells are arranged in an array, thereby forming a double-waveform negative Poisson's ratio structure. Because the mechanical state and static state of the dielectric electroactive polymer are coupled mutually, the structure can achieve the mutual transformation between the mechanical energy and electric energy, and achieves the real-time transformation, actuation, energy recycling and sensing.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Starlike negative Poisson's ratio structure based on dielectric electroactive polymers
InactiveCN107276452AImprove energy absorptionImprove vibration damping effectPiezoelectric/electrostriction/magnetostriction machinesMechanical energyHigh-voltage direct current
The invention discloses a starlike negative Poisson's ratio structure based on dielectric electroactive polymers. The structure is formed by a starlike negative Poisson's ratio cell array, and the cells consist of a quadrangular starlike bone 101 and four tendons (102~105). The tendons are made of dielectric electroactive polymers, and are of a sandwich structure, sandwich materials are dielectric elastomers, two sides are flexible electrodes, and the Young's modulus of the bone is larger than that of tendon materials. The flexible electrodes of two sides of the tendons are connected with the positive electrode and the negative electrode of high voltage direct current power supplies 106~109, and the voltage and path open-circuit state are adjustable. The starlike negative Poisson's ratio cells are arrayed, and thus the starlike negative Poisson's ratio structure can be formed. Since the mechanical states and electrostatic states of the dielectric electroactive polymers are mutually coupled, mutual conversion between mechanical energy and electric energy can be realized, and functions of structure real-time variability, actuation, energy recovery and sensing of the starlike negative Poisson's ratio structure are realized.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Improved polymer phase-based 1-3 type piezoelectric composite material and preparation method therefor
ActiveCN107170882AReduce transverse resonance interferenceHigh electromechanical coupling coefficientPiezoelectric/electrostrictive device manufacture/assemblyPiezoelectric/electrostrictive device material selectionEpoxyElectromechanical coupling coefficient
The invention relates to an improved polymer phase-based 1-3 type piezoelectric composite material and a preparation method therefor. According to the piezoelectric composite material, a sandwich type structure which is formed by epoxy resin, silicone rubber and other polymer is adopted to improve the polymer phase material to reduce influence to piezoelectric column vibration and to further improve the overall electromechanical coupling coefficient of the composite material. By adoption of a finite element analysis tool, the changing relation of resonant frequency, sound velocity, electromechanical coupling coefficient and characteristic impedance of the novel piezoelectric composite material along with volume percentages of silicone rubber is simulated; the piezoelectric composite material is prepared according to the simulation result and the performance of the material is tested; the test result proves that the experiment is basically matched with simulation; the electromechanical coupling coefficient of the composite material is improved by 11% compared with that of the conventional 1-3 type composite material; and the improved polymer phase-based 1-3 type piezoelectric composite material provided by the invention is quite suitable for manufacturing a piezoelectric composite material transducer with high electromechanical conversion efficiency.
Owner:BEIJING INFORMATION SCI & TECH UNIV
Piezoelectric device, its manufacturing method, and touch panel device
InactiveUS7605523B2Low efficiencyEasy to processPiezoelectric/electrostrictive device manufacture/assemblyPiezoelectric/electrostriction/magnetostriction machinesAlloyTouch panel
Owner:FUJITSU LTD
Method and apparatus used for cleaning air with water
InactiveCN103505967AResonance stableImprove electromechanical conversion efficiencyUsing liquid separation agentLiquid spraying apparatusHeat sinkAluminium
The invention discloses a method and an apparatus used for cleaning air with water, According to the method and apparatus, electrostatic adsorption on smoke and dust which float in the air, and dissolution of hazardous substances in the air such as methanal, methylbenzene and carbonic oxide are realized by water mist particles with anions; and then waste water and refreshed clean air are separated by condensation at low temperature. The apparatus comprises an apparatus housing 1; a waste water case 2, an atomized water case 3, a ceramic atomizing plate 3-1, a coarse steel wire mesh 4, an aluminium condenser 5, a semiconductor chilling plate 6, an aluminum heat sink 7, an axial fan 8 and a power module 9 are arranged in the apparatus housing.
Owner:张鸿东
Piezoelectric ceramic material applicable to energy collecting devices and preparation method thereof
InactiveCN102863215AImprove electromechanical conversion efficiencyStable structureEnergy harvesterElectricity
The invention relates to a piezoelectric ceramic material applicable to energy collecting devices and a preparation method thereof, belonging to the field of piezoelectric ceramic materials. The chemical composition of the matrix of the ceramic material is PbxSr1-x(Zn1 / 3Nb2 / 3ZryTi0.8-y)O3, and z wt% of CoCO3 is doped in the matrix material, wherein x is 0.90-1.00, y is 0.30-0.50, and z is 0.00-1.00. The preparation method comprises the following steps: by using ZnO, Nb2O5, Pb3O4, SrCO3, ZrO2, TiO2 and CoCO3 as raw materials, carrying out wet milling, drying, calcining, carrying out secondary ball milling, granulating, carrying out pressure molding, and sintering. The invention is applicable to energy collecting devices, can effectively recycle and reutilize waste energy, has the advantages of energy saving, environmental protection and high safety, and has obvious economic and social value.
Owner:BEIJING UNIV OF TECH
Piezoelectric micro machining energy transducer
InactiveCN102172575AImprove electromechanical conversion efficiencyImprove product performanceMechanical vibrations separationTransducerVibrating membrane
The invention relates to a piezoelectric micro machining energy transducer, which comprises a pore cavity and a vibrating membrane on the surface of the pore cavity, wherein the vibrating membrane consists of a piezoelectric layer (2), an upper electrode (3) on the upper surface of the piezoelectric layer (2) and a lower electrode (4) on the lower surface of the piezoelectric layer (2); and furthermore, the vibrating membrane protrudes outwards relative to the pore cavity. A single piezoelectric layer dome structure is adopted in the piezoelectric micro machining energy transducer, so that the electromechanical conversion efficiency and the product performance are greatly improved; meanwhile, the production process is simpler and more reliable.
Owner:SHENZHEN UNIV
Concave wave-shaped negative Poisson's ratio structure based on dielectric electroactive polymers
InactiveCN107276450AImprove energy absorptionImprove vibration damping effectNon-rotating vibration suppressionForce measurementSandwich boardMechanical energy
The invention discloses a concave wave-shaped negative Poisson's ratio structure based on dielectric electroactive polymers. The structure is formed by a concave wave-shaped negative Poisson's ratio cell array, and the cells consist of wave-shaped tendons (101~105 and 106~110) and bones (111 and 112). The tendons are made of dielectric electroactive polymers, and are of a sandwich board structure, sandwich materials are dielectric elastomers, two sides are flexible electrodes, and the Young's modulus of the bones is larger than that of the tendon materials. The flexible electrodes of upper and lower surfaces of the tendons at upper and lower sides are connected with the positive electrode and the negative electrode of high-voltage direct current power supplies 113 and 114 respectively, and the voltage and path open-circuit state are adjustable. The concave wave-shaped negative Poisson's ratio cells are arrayed, and thus the concave wave-shaped negative Poisson's ratio structure can be formed. Since the mechanical states and electrostatic states of the dielectric electroactive polymers are mutually coupled, mutual conversion between mechanical energy and electric energy can be realized, and functions of structure real-time variability, actuation, energy recovery and sensing of the concave wave-shaped negative Poisson's ratio structure are realized.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
High-electromechanical-transformation multiphase piezoelectric ceramic material applied to energy collection device and preparation method
ActiveCN107032790AImprove electromechanical conversion efficiencyStable structureElectricityEnergy harvester
The invention discloses a high-electromechanical-transformation multiphase piezoelectric ceramic material applied to an energy collection device and a preparation method and belongs to the field of piezoelectric ceramic materials. A matrix of the ceramic material is chemically composed of 0.2PZN-0.8PZT which is doped with Al2O3 of x vol. % in volume, wherein x ranges from 0.25 to 0.65. The preparation method includes: using ZnO, Nb2O5, Pb3O4, ZrO2 and TiO2 as raw materials to prepare 0.2PZN-0.8PZT; adding A12O3, and performing wet milling, drying, granulating, press-forming and sintering. A brand-new angle of view is provided for further developing high-performance piezoelectric energy collection materials, and the ceramic material is of great promoting significance in substantially improving electromechanical transformation performance of the energy collection device to enable the same to recycle waste vibration energy more effectively, to be more energy-saving, more environment-friendly and safer and to have more remarkable economic and social values.
Owner:BEIJING UNIV OF TECH
Windbell-type piezoelectric power generation device
InactiveCN103516258AIncrease profitRaise the resonancePiezoelectric/electrostriction/magnetostriction machinesElectricityResonance
The invention relates to a windbell-type piezoelectric power generation device and belongs to the field of piezoelectric power generation. The windbell-type piezoelectric power generation device is formed by hanging a plurality of rod assemblies in an array-type mode; each rod assembly includes at least two rigid rods (1) from top to bottom, the rigid rods (1) are connected through flexible joints (2), and the side wall of each flexible joint (2) is at least provided with one piezoelectric unit (3) in an attached mode. The rigid rods (1) are connected through the flexible joints (2) provided with the piezoelectric units (3) in the attached mode to form the rod assemblies. Each rod assembly in a hanging state has a plurality of bending resonant frequencies, and the rod assemblies will perform bending resonance when a driving frequency is close to a certain resonant frequency; when incoming flow passes by the rod assemblies on a windward side, the rod assemblies bend, Karman vortex streets are generated behind the rod assemblies, and the adjacent Karman vortex streets in the array have phase differences which jointly act on the rod assemblies and excite the rod assemblies to generate resonance. According to the windbell-type piezoelectric power generation device, the utilization rate of incoming flow kinetic energy is improved by utilizing the array-type structure, and the electromechanical conversion efficiency of the system is improved by utilizing the resonance; the windbell-type piezoelectric power generation device has the advantages of being insensitive in incoming flow direction and wide in flow rate range.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Photoacoustic endoscopic type A scanning imaging system
InactiveCN103969192AHigh densityImprove electromechanical conversion efficiencySurgeryMaterial analysis by optical meansCamera lensHigh density
The invention relates to the technical field of endoscopic imaging, and in particular relates to a photoacoustic endoscopic type A scanning imaging system. The system comprises an exciting and sensing unit A and a controlling and processing unit B which are connected with each other through a cable, wherein the exciting and sensing unit A comprises an endoscopic lens and a cable which are connected with each other; the cable is connected to the controlling and processing unit B. The system disclosed by the invention has the advantages that the cMUT technique is adopted, the processing size and the system size of a cMUT ring array sensor are respectively at micrometer magnitude and millimeter magnitude, high-density array is easy to form, the bandwidth is large, the electromechanical conversion efficiency is high, and the micromation and the practicability of the system structure are realized; cMUT array elements are arranged in a ring array structure, the photoacoustic type A detecting imaging of multiple sites in the front area of a central axis can be realized, each element can receive photoacoustic signals by selecting different numbers of vibration membranes so as to improve the system detectivity.
Owner:JIANGXI SCI & TECH NORMAL UNIV
Up-conversion electromagnetic-friction series composite wave energy collection system
ActiveCN110784121AEasy to packNovel structureMachines/enginesEngine componentsGear wheelCollection system
The invention relates to an up-conversion electromagnetic-friction series composite wave energy collection system. The system comprises a plurality of wave energy collection units which are connectedthrough ropes and are arranged in an array to form a net-shaped structure, wherein the wave energy collecting unit comprises a gravity rolling wheel, a driving seesaw, an inner gear, an outer gear anda movable wheel, the gravity rolling wheels are arranged on the driving seesaw and roll left and right along the driving seesaw, the inner gear is fixedly connected below the driving seesaw, the inner gear is meshed with the outer gear, the outer gear is meshed with a gear on the movable wheels, a plurality of permanent magnets are arrayed on the movable wheels along the circumference, a supportis arranged between the two symmetrical movable wheels and fixed on a sealing cover, a plurality of induction coils are arrayed inside the support along the circumference, and an electricity obtainingelectronic plate and an electricity losing electronic plate are respectively arranged on a lower side of the driving seesaw and an upper side of the support. The system is advantaged in that the output power under low-frequency weak excitation can be improved, and the system can effectively work under low-frequency wave excitation in any direction and is suitable for an all-weather marine environment.
Owner:SHANGHAI JIAO TONG UNIV +1
Large-strain electrostriction ceramic material and preparation method thereof
InactiveCN101538155AImprove electromechanical conversion efficiencyHigh mechanical thrustTransformation efficiencyTransducer
The invention discloses a large-strain electrostriction ceramic material and a preparation method thereof. The large-strain electrostriction ceramic material comprises the following metal oxides by molar percentage: 40-45 of PbO, 25-35 of ArO2, 10-15 of SnO2, 5-10 of TiO2, 4-8 of La2O3 and 1-5 of BaO. The ceramic material is prepared with a solid phase sintering method, is preserved in heat for a short time in a high-temperature area and sintered in a lower-temperature area for a long time under a heat preservation state so as to obtain the ceramic material with uniform grain size and dense ceramic quality. The longitudinal electrostriction S33 of the electrostriction ceramic material reaches 0.3 percent, and the electro-mechanical transformation efficiency reaches 50 percent. The large-strain electrostriction ceramic material has the characteristics of large electrostriction, large mechanical thrust force and high electro-mechanical transformation efficiency and is suitable for manufacturing large-displacement actuators and macro-energy electroacoustic transducers.
Owner:XI AN JIAOTONG UNIV
Vehicle vibration power generation device with USB interface
ActiveCN103715827AHigh vibration pickup efficiencyImprove electromechanical conversion efficiencyElectrical storage systemEnergy storageWorking lifeIn vehicle
The invention relates to a vehicle vibration power generation device with a USB interface. The device adopts a heavy hammer and a double-acting type ratchet wheel as a vibration pickup mechanism, a gear set is a vibration mechanical energy transmission mechanism, a direct current permanent magnet generator is an electromechanical energy conversion mechanism, and an electric energy processing circuit with a USB interface processes irregular direct current electric energy, and supplies power to a vehicle-mounted electronic device. The vehicle vibration power generation device uses the double-acting type ratchet wheel mechanism for vibration pickup, converts rectilinear motion in vehicle running to rotational motion, and drives the low damping permanent magnet direct current generator to work through the efficient gear mechanism, and compared with a common linear type vibration power generation device, the transmission and conversion efficiency of vibration mechanical energy can be significantly improved. The vehicle vibration power generation device with the USB interface generates power by renewable energy, the vibration pickup efficiency, and the energy transmission and conversion efficiency are high, the working life is long, the USB interface is adopted to be suitable for the use of most vehicle-mounted electronic devices, and the universality is strong.
Owner:天津融承科技有限公司
Ultrasonic motor with multiple axially laminated stators
InactiveCN106533253AMeet the application requirements of specific occasionsAvoid crackingPiezoelectric/electrostriction/magnetostriction machinesElectricityElectric machine
The invention provides an ultrasonic motor with multiple axially laminated stators. The ultrasonic motor comprises at least two stators, a rotor and an output shaft, wherein each stator comprises a hollow stator plate and a piezoelectric ceramic module; a hollow stator ring is arranged in the middle of each stator plate; bonding pads in annular distribution are arranged on each stator ring; each piezoelectric ceramic module comprises N piezoelectric ceramic elements; the piezoelectric ceramic elements are welded and fixed on the bonding pads of each stator ring; a gap for vibration of each stator ring is arranged between each stator plate and the corresponding stator ring; each stator ring is connected with the corresponding stator plate through a connector; the rotor is in contact with the surfaces of the piezoelectric ceramic modules, an output shaft passes through the middle parts of the sequentially laminated rotor and stator rings to be connected; and the stators drive the rotor to rotate to form power output. According to the ultrasonic motor, the stators are axially laminated to form high torque output, the energy efficiency utilization rate is high and the electromechanical conversion efficiency is high.
Owner:SHENZHEN UNIV
Electromagnetic vibration power supply method based on folding cantilever beam
ActiveCN110289746AReduce leakageImprove the utilization of magnetic fluxDynamo-electric machinesMagnetic lineEnergy harvester
The invention belongs to the field of vibration energy power generation, and provides an electromagnetic vibration power supply method based on a folding cantilever beam. The method comprises the following steps: converting vibration with a specific frequency of mechanical equipment into electric energy by an energy collector mounted on the mechanical equipment, and supplying power to a micro-miniature electronic system, wherein the energy collector comprises a base, a mass block and a pair of folding cantilever beams, two ends of the mass block are respectively connected to the base through a folding cantilever beam, two ends of a folding cantilever beam circuitous structure are fixedly connected with the base, the middle part of the folding cantilever beam circuitous structure is fixedly connected with the end part of the mass block, a plurality of coils are fixedly connected to the base through a supporting seat, and the hollow parts which surround the coils and are fixedly provided with permanent magnets are sequentially arranged at intervals on the mass block. When a spring mass block oscillation system vibrates, the coil cuts magnetic lines of force in a reciprocating manner to generate current. The energy collector which is compact in structure and high in electromechanical conversion efficiency is adopted as a power source of the wireless sensor node, so the implementation and maintenance cost is low.
Owner:中国人民解放军92578部队
Double-control rectifying vehicle alternating-current generator
InactiveCN101728885AImprove conversion efficiencySave car fuelSynchronous generatorsAc-dc conversionDynamoTractor
The invention relates to a double-control rectifying vehicle alternating-current generator which mainly comprises a belt pulley, a front end cover, a front bearing, a stator, an excitation rotor, a rear end cover, a rear bearing, a double three-phase half-controlled type rectifier, a regulator, a conversion control circuit and a rear cover. The double-control rectifying vehicle alternating-current generator is characterized in that external characteristic curves of a high-turn winding L1 and a low-turn winding L2 intersect at a K point, and the rotating speed corresponding to the K point is nK; when the working rotating speed of the generator is below nK, the conversion control circuit turns off controlled silicons SCR4-SCR6 and sequentially triggers and conducts a controlled silicon with highest forward voltage after passing through a natural reversal point in controlled silicons SCR1-SCR3; and when the working rotating speed of the generator is above nK, the conversion control circuit turns off the controlled silicons SCR1-SCR3 and sequentially triggers and conducts a controlled silicon with the highest forward voltage after passing through the natural reversal point in the controlled silicons SCR4-SCR6. Thus the double-control rectifying vehicle alternating-current generator realizes the switching between the works of the winding L1 and the winding L2 along with the rotating speed of the generator, has the advantage of high average efficiency and is suitable for vehicles, tractors, tanks, and the like.
Owner:陈国弟
Piezoelectric thread driving type one-dimensional positioning platform
InactiveCN111854663AIncrease the speed of positioningIncrease loadPiezoelectric/electrostriction/magnetostriction machinesUsing optical meansPhysicsPhase displacement
The invention relates to a piezoelectric thread driving type one-dimensional positioning platform, and belongs to the technical field of precision driving and positioning. The platform comprises a positioning workbench, a lifting mechanism, a driving mechanism and a base; the driving mechanism includes a piezoelectric thread driver composed of a stator and a rotor; the stator consists of four piezoelectric transducers with the same structure and a flange nut, and the rotor is a screw rod; the four piezoelectric transducers are located in the base and connected with the outer circumference of the nut base through flexible hinges respectively. The flange nut is fixed to one axial end of the nut seat and connected with the screw in a matched mode. The upper end of the screw rod is in contactwith the bottom surface of the positioning workbench, when two groups of sine alternating-current voltages with the same frequency, the same amplitude and the phase difference of pi / 2 are adopted andthe driving signals are used as two groups of driving signals for forming four piezoelectric transducers which are orthogonally arranged, the screw rod is driven to obtain the rotating speed, generateclockwise or anticlockwise rotating motion and convert the clockwise or anticlockwise rotating motion into axial linear motion, so that the positioning workbench is pushed to generate upward or downward lifting motion.
Owner:HEFEI UNIV OF TECH
Efficient ultrasonic scale-preventing/removing device for long-pipeline
Owner:上海兴全电力技术有限公司
Efficient and anti-explosion three-phase asynchronous motor
ActiveCN107124066AImprove stabilityReduce vibrationStructural associationCooling/ventillation arrangementTemperature controlAir spring
The invention discloses an efficient and anti-explosion three-phase asynchronous motor. The efficient and anti-explosion three-phase asynchronous motor comprises a rotor, a stator, a motor shell, an end cover and a current collection ring; a hollow cushioning cavity is formed in one end, towards the end cover, of the motor shell; an air spring is arranged in the hollow cushioning cavity in a sleeving manner; the space between the hollow cushioning cavity and the air spring is filled with a coolant; meanwhile, a coolant inlet and a coolant adding opening are also formed between the motor shell and the hollow cushioning cavity; the coolant inlet and the coolant adding opening are connected with a coolant adding apparatus separately; the coolant adding apparatus is also provided with a temperature control apparatus; the temperature control apparatus is connected with a temperature sensor arranged in the hollow cushioning cavity to realize temperature control to the hollow cushioning cavity; and the air spring comprises a sealed damping section, a cooling compression section and an internal embedding connection section. The three-phase asynchronous motor provided by the invention has a simple structure, a good shakeproof effect, stable operation, relatively high electromechanical conversion efficiency and relatively long service life.
Owner:NANTONG SEN MATE ELECTRIC CO LTD
Quasi-zero-stiffness human motion energy collecting backpack
ActiveCN112914223AImprove electromechanical conversion efficiencyReduce volumeTravelling sacksOther accessoriesHigh energyEngineering
The invention relates to a quasi-zero-stiffness human body motion energy collecting backpack which comprises a quasi-zero-stiffness human body motion energy collector; the quasi-zero-stiffness human body motion energy collector is connected with a load-bearing backpack through an installation protruding block on a connecting sliding block rack. The quasi-zero-stiffness human body motion energy collector comprises a shell, a front cover plate, a quasi-zero-stiffness assembly, a transmission assembly, a mounting plate, a pawl disc assembly, a magnet disc assembly, a main shaft, a coil and a rear plate; the quasi-zero-stiffness assembly is connected with the shell; the transmission assembly is mounted on the mounting plate and connected with the quasi-zero-stiffness assembly in an engaged mode; the pawl disc assembly is installed on the other face of the mounting plate and connected with the magnet disc assembly in a meshed mode; the magnet disc assembly is installed on the main shaft through a bearing and corresponds to the coil, and the coil is embedded in the rear plate in a circumferential array mode. Compared with the prior art, the backpack can continuously output electric energy with a high energy utilization rate and conversion rate, and avoids defects that an existing power generation backpack is low in output power, low in energy conversion efficiency and the like.
Owner:HUNAN INSTITUTE OF ENGINEERING +1
Silicone rubber composite material with high mechanical-electrical conversion efficiency and preparation method thereof
ActiveCN113088089AIncrease energy densityImprove electromechanical conversion efficiencyHigh energyPlasticizer
The invention relates to a silicone rubber composite material with high mechanical-electrical conversion efficiency and a preparation method thereof, and belongs to application of dielectric elastomer materials in the field of generators. The composite material comprises 100 parts of a rubber matrix, 1-5 parts of a vulcanizing agent, 5-30 parts of a modified inorganic nano filler, 10-50 parts of a modified inorganic micron filler and 0-50 parts of a plasticizer. According to the preparation method, the dielectric constant of the composite material is improved, meanwhile, the lower elastic modulus is kept, and the silicone rubber nano composite material with the high dielectric constant, the low elastic modulus, the high energy density and the high mechanical-electrical conversion efficiency is obtained. The novel silicone rubber composite material provides a preparation method and thought of a novel material for the field of dielectric elastomer generators.
Owner:BEIJING UNIV OF CHEM TECH
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