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81results about How to "Improve energy transfer efficiency" patented technology

Micro-grid cluster distributed control method and system based on information interconnection

The invention relates to the technical field of micro-grid distributed control, in particular to a micro-grid cluster distributed control method and system based on information interconnection. The method comprises the following steps: identifying a micro-grid cluster in a region, and extracting a plurality of micro-grid nodes; obtaining a plurality of microgrid operation state parameters; performing filtering standardization processing on the plurality of micro-grid operation state parameters, and constructing a micro-grid time sequence load change curve; discrete wavelet transform is carried out on the micro-grid time sequence load change curve, load fluctuation frequency trend mining is carried out, and micro-grid load fluctuation frequency trend characteristics are generated; carrying out data stream encapsulation on the load fluctuation frequency trend characteristics of the micro-grid, and constructing a cloud environment distributed computing framework; carrying out dynamic load demand calculation on the plurality of micro-grid nodes based on a cloud environment distributed calculation framework so as to obtain multi-period load demand prediction data of each micro-grid; according to the invention, high-efficiency microgrid cluster control with high energy utilization rate is realized.
Owner:NINGBO OSDA SOLAR CO LTD

NIR-IIb / c rare earth nanoparticle fluorescent probe as well as preparation method and application thereof

The invention provides an NIR-IIb / c rare earth nanoparticle fluorescent probe as well as a preparation method and application thereof. The fluorescent probe sequentially comprises a core, an active shell and an inert shell from inside to outside, wherein the core comprises Tm < 3 + > ions and Er < 3 + > ions, and the active shell comprises Er < 3 + > ions, Yb < 3 + > ions and Ce < 3 + > ions. The fluorescent probe provided by the invention has an efficient energy transfer system, not only has bright luminescence in an NIR-IIb wave band (1500-1700 nm), but also has luminous intensity increased by dozens of times in an NIR-IIc wave band (1700-1900 nm) compared with that of a traditional probe. The hydrophilic modification method of the probe is also improved, and the biocompatibility of the probe is improved by a multi-layer polymer cross coating method, so that the probe still has good luminescence property in an organism, and the penetration depth and resolution of biological tissues during imaging are improved.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA

Multi-hop RIS signal coverage method without CSI dependency

The invention discloses a multi-hop RIS (Radio Information System) signal coverage method without CSI (Channel State Information) dependency, which belongs to the field of communication, and is characterized in that modeling is carried out on an incident signal of each RIS based on phase compensation, the modeling is more accurate compared with a traditional point source model, a codebook solution method capable of uniformly covering the next RIS is designed in the transmission stages of BS-RIS-RIS and RIS-RIS-RIS, and the coverage efficiency of the next RIS is improved. According to the method, the energy transfer efficiency of the next RIS can be improved, an optimization problem can be established to obtain an RIS codebook for beamforming only by considering a signal transmitting position and a signal receiving position needing to be enhanced during signal modeling, a complex channel estimation process is not needed, computing resources are saved, and on the premise that channel state information is not needed, the energy transfer efficiency of the next RIS can be improved. A phase control matrix of each RIS block in the multi-hop RIS is obtained, and signal enhancement in a traditional communication signal range scene such as a mine hole is achieved by controlling each RIS block.
Owner:HUAZHONG UNIV OF SCI & TECH

Electromagnetic composite nondestructive testing sensor, system and method

The present invention discloses an electromagnetic composite nondestructive testing sensor, system and method, belonging to the field of nondestructive testing technology, including an excitation component and a receiving component; the excitation component includes a first excitation coil for receiving an extremely low frequency excitation signal, a low frequency excitation signal or a medium-high frequency excitation signal, and a second excitation coil for receiving a medium-low frequency excitation signal or a high frequency excitation signal. The excitation component and the receiving component working based on excitation signals of different frequencies are integrated into the same sensor, and different excitation signals are introduced into the first excitation coil and the second excitation coil at different times to achieve different nondestructive tests, including eddy current detection, AC electromagnetic field detection, magnetic Barkhausen noise detection, incremental magnetic permeability detection and other nondestructive tests, so as to obtain stress changes caused by microstructures, the influence of incremental magnetic permeability on stress, and the influence of electrical conductivity and magnetic permeability on stress, so as to accurately judge the stress size of components, and provide an experimental verification basis for the study of complex stress theory.
Owner:SICHUAN CHENGDIAN MULTIPHYSICAL INTELLIGENT PERCEPTION TECH CO LTD

Ultrasonic separation method and device for laser split crystal ingots in high-pressure liquid environment

The invention belongs to the technical field of wafer processing, and particularly relates to a high-pressure liquid environment laser splinter crystal ingot separation method and device. And placing the crystal ingot in high-pressure liquid for ultrasonic treatment. And placing the crystal ingot subjected to laser splintering treatment in high-pressure liquid, and promoting microcracks generated by splintering of the crystal ingot to expand under the action of ultrasonic waves so as to complete wafer separation. The high-pressure liquid environment provides higher energy transfer efficiency, the cavitation effect of ultrasonic waves is enhanced, and the wafer separation efficiency is improved. Besides, in a high-pressure liquid environment, after liquid permeates into the crack, energy can be uniformly applied to the starting point and the end part of the crack in combination with the action of ultrasonic waves, so that the crack is more uniformly expanded; the uniform expansion not only improves the splitting effect, but also improves the overall separation quality of the wafer. By integrating the effects, the method has a good application prospect in the technical field of wafer processing.
Owner:BEIJING JINGFEI SEMICON TECH CO LTD

Room temperature continuous wave perovskite laser based on chiral amine ligand and preparation method thereof

The invention discloses a chiral amine ligand-based room-temperature continuous-wave perovskite laser and a preparation method thereof, a quasi-two-dimensional perovskite film with ordered phase distribution, strong crystal orientation and low lattice distortion degree is obtained by using a chiral amine ligand, and these characteristics endow the film with an excellent four-level material structural system, a high-energy-level material structural system, a high-energy-level material structural system, a high-energy-level material structural system, a high-energy-level material structural system, a high-energy-level material structural system and a high-energy-level material structural system. The carrier pumping efficiency is enhanced, population inversion is facilitated, and the laser threshold is reduced; the energy transfer efficiency from a low two-dimensional phase (n = 1) to a high two-dimensional phase (ngt; 5) is enhanced; the number and strength of hydrogen bonds between the perovskite octahedral frame and the perovskite octahedral frame are increased, and the electroacoustic coupling effect is effectively inhibited. The prepared chiral quasi-two-dimensional perovskite serves as a gain medium and is combined with an optical resonant cavity to prepare a laser, room-temperature low-threshold continuous wave or pulse laser emission can be realized under various coherent light source pumps, the threshold is 1-3 orders of magnitude lower than that of a traditional semiconductor laser, and the optimized threshold can reach 1.57 W / cm < 2 >.
Owner:ZHEJIANG UNIV

Modulation method and circuit of single-stage multi-port motor driver for realizing port power control

The invention discloses a modulation method and circuit of a single-stage multi-port motor driver for realizing port power control, relates to the technical field of motor control, and solves the technical problems of complex process, large power ripple and slow dynamic response when an extra PI controller indirectly adjusts the proportion of a redundant vector or a zero-sequence component to adjust the port power. The method comprises the following steps: converting original three-phase reference voltage into three-phase reference voltage va, vb and vc under a natural coordinate system; injecting a first zero-sequence voltage vo1 into the three-phase reference voltage to generate first direct-current modulation signals vaz1, vbz1 and vcz1; injecting a second zero sequence voltage vo2 into the first direct current type modulation signal to generate second direct current type modulation signals vaz2, vbz2 and vcz2; and comparing the second direct-current modulation signal with the asymmetric triangular carrier, generating a switching signal for driving a single-stage multi-port motor driver, and controlling a plurality of bridge arms to perform switching operation. According to the invention, the port power is accurately and rapidly controlled, the control process is simple, and the power ripple is small.
Owner:UESTC (SHENZHEN) ADVANCED RES INST

Medium-voltage alternating-current bidirectional flexible interconnection device

The invention provides a medium-voltage alternating-current bidirectional flexible interconnection device, which belongs to the technical field of power distribution and comprises a first phase-shifting transformer, a second phase-shifting transformer and a three-phase current source type flexible power transmission unit, the three-phase current source type flexible power transmission unit is located between the first phase-shifting transformer and the second phase-shifting transformer, and the first medium-voltage bus and the second medium-voltage bus are located at the lower end of the total drop of any two active high voltages; and the three-phase current source type flexible power transmission unit is used for performing bidirectional scheduling on the alternating current electric energy between the first medium-voltage bus and the second medium-voltage bus under the control instruction. When temporary uneven energy distribution occurs between transformers in a power distribution network of two power distribution transformers, energy redistribution can be realized, and energy balance can be realized to the greatest extent.
Owner:HUBEI CHUNTIAN ELECTRICAL TECH CO LTD

Intelligent reflecting surface and covert communication system

This application discloses an intelligent reflective surface and a covert communication system, belonging to the field of wireless communication technology. The intelligent reflective surface includes multiple intelligent reflective surface units arranged in an array; each intelligent reflective surface unit includes: a first substrate, a second substrate, and a third substrate; a metal patch and a varactor diode, located on the side of the third substrate opposite to the second substrate; the metal patch includes a first patch and a second patch, and the varactor diode is located between the first patch and the second patch, with its negative and positive terminals electrically connected to the first patch and the second patch, respectively; a metal ground plane, located between the first substrate and the second substrate; a first bias line and a second bias line, located on the side of the first substrate opposite to the second substrate; the first bias line is electrically connected to the metal ground plane and the first patch, respectively, and the second bias line is electrically connected to the second patch. This application can achieve precise control of electromagnetic waves, reduce electromagnetic energy loss, improve energy transmission efficiency, suppress electromagnetic wave leakage, and improve communication covertness.
Owner:CHINA GRIDCOM

Reactive power optimization control method suitable for series resonance dual-active bridge

The invention discloses a reactive power optimization control method suitable for a series resonance dual active bridge, relates to the technical field of power electronic converter control, and solves the problem that an effective compensation scheme is not provided for an incomplete soft switching problem caused by dead time in the prior art. And the requirement of all-working-condition efficient operation in engineering application is difficult to meet. Based on triple phase shift control, the optimal phase shift angle combination is accurately solved through the power factor Lagrange function and the KKT condition, the reactive power of the primary side or the secondary side can be counteracted in a targeted manner, and the energy circulation of the resonant cavity is effectively inhibited; meanwhile, soft switching boundary analysis and critical phase compensation are combined, so that zero-voltage switching of all main switching tubes in a full-voltage gain and full-load range can be ensured, and switching loss is reduced; and a mode switching mechanism is designed in control logic to adapt to dynamic working condition response requirements, so that the energy transmission efficiency and working condition adaptability of the series resonance dual-active bridge converter are greatly improved.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD

Refrigerator

The utility model discloses a refrigerator, and belongs to the technical field of household appliances. The refrigerator comprises a refrigerator body and a refrigerator door, a back plate of the refrigerator body is provided with a power panel and a first resonance circuit, the refrigerator door is provided with a second resonance circuit, a rectifier and a display panel, and the first resonance circuit and the second resonance circuit are the same in frequency; the output end of the power panel is connected with the input end of the first resonant circuit; the first resonant circuit is used for generating an alternating magnetic field based on electric energy provided by the power panel; the output end of the second resonant circuit is connected with the input end of the rectifier, the second resonant circuit is used for generating induced current based on the alternating magnetic field, and the rectifier is used for converting the induced current into direct current; the output end of the rectifier is connected with the power supply end of the display panel, and the rectifier is used for transmitting the direct current to the display panel to supply power to the display panel. Through wireless transmission of energy, the circuit layout of the supply circuit is simplified, and the potential safety hazard of electricity utilization caused by circuit abrasion is avoided.
Owner:HISENSE HOME APPLIANCES GRP CO LTD

Electromagnetic wave radiation drying device and drying method

The electromagnetic wave radiation drying device comprises a drying assembly, an electromagnetic wave radiation assembly and a reflection assembly, the drying assembly comprises a drying box and a vacuum machine, the drying box is provided with a plurality of inner side faces, and the electromagnetic wave radiation assembly comprises a plurality of electromagnetic wave radiation sources; the plurality of electromagnetic wave radiation sources are respectively arranged on the plurality of inner side surfaces, the reflection assembly comprises a plurality of reflection parts, the plurality of reflection parts are respectively arranged on the plurality of inner side surfaces, and the number of the electromagnetic wave radiation sources on each inner side surface is greater than that of the reflection parts; according to the electromagnetic wave radiation drying device and method, electromagnetic waves are sent through the electromagnetic wave radiation source so as to dry the to-be-dried object in the drying box, meanwhile, a vacuum environment can be formed in the drying box through the vacuum machine, the electromagnetic wave energy transmission efficiency is improved, and the electromagnetic waves can be reflected through the reflection component; full coverage of electromagnetic waves in the drying box is guaranteed, the drying effect is guaranteed, and energy consumption is reduced.
Owner:SHANDONG UNIV

A wireless charging system, method, extracorporeal charging device, and storage medium

The application provides a wireless charging system, method, external charging device and storage medium, including an implantable medical device and an external charging device for wireless energy transmission with the implantable medical device, the wireless charging system further includes a voice prompt module and a control module, the control module is configured to: control the external charging device to work in a scanning mode to obtain a charging efficiency local distribution map for a region where the implantable medical device is located; based on the charging efficiency local distribution map, determine at least one optimal charging target position, and generate user navigation instructions corresponding to the optimal charging target position; control the voice prompt module to broadcast the navigation instructions to guide the user to move the external charging device to the optimal charging target position, the scheme solves the problem that the user cannot determine the best charging position, thereby causing difficult alignment, low charging efficiency, and improves the alignment accuracy, energy transmission efficiency, operation safety and user operation convenience of wireless charging.
Owner:SCENERAY

Waste calcium carbide remelting, upgrading and conveying device

The utility model provides a waste calcium carbide remelting and upgrading conveying device, which belongs to the technical field of conveying devices, and comprises a crushing chamber, a rotator arranged in the crushing chamber, two first rotating shafts rotationally connected in the rotator, two crushers fixedly connected to the lower ends of the two first rotating shafts, and two second rotating shafts rotationally connected in the two crushers. The two first gears are fixedly connected to the circumferential surfaces of the two first rotating shafts, the gear ring is fixedly connected to the interior of the crushing chamber, and the first gears are meshed with the gear ring. Meanwhile, powder calcium carbide directly reaches the furnace bottom through the inside of the electrode and does not make contact with a furnace charge layer, current shunting is eradicated, waste products are directly added to the furnace bottom after being powdered and can be rapidly reacted and fused with semi-finished product calcium carbide, and electric energy consumption is greatly reduced.
Owner:FENGZHEN CITY JIA SILICON MENG ALLOY CO LTD

Passive Q-switched pulse laser with wave band of 1.5-1.6 [mu] m

The invention discloses a 1.5-1.6 [mu] m wave band passive Q-switched pulse laser, and belongs to the technical field of laser devices. According to the passively Q-switched pulse laser, the Er < 3 + > / Yb < 3 + > double-doped YPO4 crystal (Er < 3 + >: Yb < 3 + >: YPO4) with high thermal conductivity, long laser upper-energy-level fluorescence lifetime and high Yb < 3 + >-> Er < 3 + > energy transfer efficiency is adopted as a gain medium, and a semiconductor laser pulse pumping scheme is utilized, so that human-eye-safe 1.5-1.6 [mu] m waveband pulse laser with stable operation, high energy, high repetition frequency and narrow pulse width is realized; the light source can be used as a detection light source of laser range finders and laser radars.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Novel swing type planetary ball mill

ActiveCN224271362UComplicated trajectoryReduce the phenomenon of insufficient grindingGrain treatmentsVertical vibrationClassical mechanics
The utility model discloses a novel swing type planetary ball mill, which relates to the technical field of ball milling equipment and comprises a base, two swing support frames fixed at the top of the base, swing bearing seats fixed at the tops of the swing support frames, a swing frame rotatably connected between the two swing support frames through the swing bearing seats, and a swing arm mechanism arranged on the base. The swing arm mechanism comprises a speed reducer fixed to the base, a motor is installed at the input end of the speed reducer, a rotating wheel is fixed to an output shaft of the speed reducer, a swing arm is fixed to the shaft end of one end of the swing frame, and a connecting rod is rotationally connected between the rotating wheel and the swing frame. Reciprocating swing of the grinding tank can enlarge the coverage range of grinding balls in the tank, the phenomenon that materials on the inner edge or the bottom of the grinding tank are not fully ground in a traditional single rotation mode is reduced, an additional impact direction such as horizontal or vertical vibration can be introduced, energy input in unit time can be improved in combination with original planetary rotation, and the service life of the grinding tank is prolonged. And particularly, the crushing effect on tough materials is better.
Owner:CHANGSHA TIANCHUANG POWDER TECH CO LTD

Chiral rare earth metal polymer and preparation method thereof

The invention discloses a preparation method of a chiral rare earth metal polymer, which specifically comprises the following steps: step 1, preparing 1-(4 '-vinyl-[1, 1'-biphenyl]-4-yl) ethane-1-ketone; step 2, preparing 4, 4, 4-trifluoro-1-(4 '-vinyl-[1, 1'-biphenyl]-4-yl) butane-1, 3-diketone according to the product obtained in the step 1; step 3, preparing chiral-bis (diphenyl phosphino oxygen)-1, 1 '-binaphthalene; 4, preparing a rare earth compound according to the product obtained in the step 2 and the product obtained in the step 3; and 5, preparing the chiral rare earth metal polymer according to the product obtained in the step 4 and methyl methacrylate. The invention also discloses the chiral rare earth metal polymer prepared by the preparation method, and the polymer prepared by the invention not only endows a complex with chiral activity, but also avoids fluorescence quenching of coordination of solvent molecules and Eu < 3 + > ions.
Owner:SHAANXI UNIV OF SCI & TECH

A bidirectional ac / dc converter

ActiveCN117595701Bsmall sizeImplement two-way transmissionDc-dc conversionAc-dc conversionCapacitanceTransformer
This invention discloses a bidirectional AC / DC converter, belonging to the field of power conversion technology. It includes a first transformer and multiple switches. The opposite-named terminal of the primary winding of the first transformer is connected to the first terminal of the first switch. The opposite-named terminal of the secondary winding of the first transformer is connected to the first terminal of the second switch. The second terminal of the second switch is connected to the first terminal of the third switch. The second terminal of the third switch is connected to the same-named terminal of the secondary winding of the first transformer. The opposite-named terminal of the secondary winding of the first transformer is connected to the first terminal of the fourth switch. The second terminal of the fourth switch is connected to the first terminal of the fifth switch. The second terminal of the fifth switch is connected to the same-named terminal of the secondary winding of the first transformer. This bidirectional AC / DC converter enables bidirectional energy transfer. When the DC side is a photovoltaic module, it can provide reactive power to the capacitor on the photovoltaic module side, absorb reactive power on the photovoltaic module side, and adjust the power factor.
Owner:FSP POWERLAND TECHNOLOGY INC

Intramedullary nail for long bone traction

An intramedullary nail (1) for long bone traction comprises a first tube (3) extending along the axial direction of the intramedullary nail (1); a second tube (5) extending along the axial direction of the intramedullary nail (1), the second tube (5) being coupled to the first tube (3) so as to be axially movable with respect to each other; a first locking opening (7) located in the end region of the first tube (3) away from the second tube (5); and a coil (11) arranged in the coil region of the first tube (3) between the first locking opening (7) and the second tube (5).
Owner:ORTHOFIX SRL

PDC (Polycrystalline Diamond Compact) drill bit with impact function

The invention belongs to the technical field of oil and gas drilling, and particularly relates to a PDC drill bit with an impact function. The PDC drill bit with the impact function comprises a drill bit body, a channel used for flowing of drilling fluid is formed in the drill bit body, and a punch is arranged in the drill bit body and linearly reciprocates with the central axis of the punch at a certain angle. The end, close to the working end of the drill bit body, of the punch can exceed the range of the drill bit body in the reciprocating motion process. The impact drill bit can solve the problem that an existing impact drill bit easily causes failure of PDC teeth.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

High-uniformity quantum dot diffusion plate and preparation method thereof

The invention relates to the technical field of quantum dot diffusion plates, in particular to a high-uniformity quantum dot diffusion plate and a preparation method thereof, and the high-uniformity quantum dot diffusion plate comprises the following components in parts by weight: 90-99.9 parts of diffusion particles; 0.1 to 10 parts of quantum dots; 0.1-5 parts of a stabilizer; wherein the stabilizer comprises at least a high-uniformity quantum dot diffusion plate in a nitroxide free radical light stabilizer, a hindered amine light stabilizer and a hydroquinone light stabilizer, and the multi-stage scattering structure not only provides high light transmittance of 90% or above, but also realizes ultra-low haze of 1.5% or below. The optical performance is obviously improved from accurate regulation and control of refractive index gradient and stress field distribution; the modified interface layer shows excellent stress buffering capacity, and keeps the integrity of 98% or above in the thermal cycle process of-40 DEG C to 120 DEG C. Especially, the gradient structure of the interface layer effectively inhibits thermal stress concentration, and the reliability of the product is remarkably improved.
Owner:REGENCY OPTICS ELECTRON CORP

Follow-up clamping device

ActiveCN121589430BResolve dead endsSolve the problem of blind spotsLaser beam welding apparatusGas supplyLaser soldering
This invention provides a follow-up clamping device for providing vortex gas to a laser welding head to protect the workpiece being welded. The follow-up clamping device includes: a clamping body having a conical inner cavity; a connecting member, one end of which is connected to the laser welding head; and an annular gas supply member, through which gas is introduced from the large opening side of the conical inner cavity, converges and forms a vortex-like converging airflow within the conical inner cavity, and is then ejected from the small opening side of the conical inner cavity, suitable for spraying towards the workpiece being welded. This invention solves the problems of unstable gas protection and the existence of protection dead zones in existing technologies, as well as the problem of severe plasma shielding effects affecting welding depth and energy transmission in existing technologies. It also solves the problem of existing laser welding clamping mechanisms obstructing airflow and causing protection blind zones.
Owner:ZHEJIANG JINGJIAXIN TECHNOLOGY CO LTD

A method and device for adaptive load matching of radio frequency power supply

The present invention provides an adaptive load matching method and device for a radio frequency power supply, which relates to the field of power supply management technology, including: establishing a load data set of a load, establishing a load feature extraction result, and building a steady-state prediction network for the load; performing random frame sampling on the load, establishing a frame sampling result, performing steady-state prediction, and generating a steady-state prediction result; performing time interval clustering of the load, establishing a time interval clustering result, and re-collecting data within the time interval clustering result to generate a data collection result; configuring a comprehensive evaluation formula to generate an impedance feature comprehensive evaluation result; establishing an impedance matching model for the radio frequency power supply, and generating matching parameters for the radio frequency power supply; and controlling the radio frequency power supply to perform power supply control management for the load. The present invention solves the technical problem in the prior art that the radio frequency power supply has a slow response speed and cannot adjust the matching parameters in time when facing dynamic load changes, resulting in low energy transmission efficiency.
Owner:JIANGSU SHENZHOU SEMICON TECH CO LTD

A follow-up resonant grinding and foreign matter cleaning device and process for power cables

PendingCN122666401ASignificant technological progresssignificant beneficial effects
This invention belongs to the field of grinding and surface finishing technology, and relates to a follow-up resonant grinding and foreign matter removal device and process for power supply cables. The device includes a precision resonant actuation mechanism, a contour grinding head, a grinding impedance detection unit, and a frequency conversion grinding control center. Based on the electromechanical coupling impedance signal, the control center tracks the mechanical resonant point through phase-locked logic and adjusts the drive signal frequency, so that the contour grinding head with its segmented, clamping structure is in a resonant grinding state with the foreign matter on the surface of the power supply cable. The high-frequency vibration of the inner abrasive layer performs micro-cutting and shearing peeling of the foreign matter; and adaptive mode switching is achieved based on the dynamic characteristics of the impedance spectrum. This invention achieves non-destructive precision micro-grinding, efficiently removes ice buildup and improves the surface finish of the workpiece, avoiding damage from traditional rigid scraping, and is suitable for cleaning the surface of power supply cables such as cables.
Owner:CHINA RAILWAY ELECTRIFICATION ENGINEERING GROUP CO LTD

Variable cross-section hammer core

This utility model discloses a variable cross-section hammer core, comprising a hammer core body separately configured from a piston. The hammer core body comprises n segments with different shaft diameters and coaxiality, where n ≥ 2 is an integer. The n segments of the hammer core body have discontinuous cross-sections, with the upper segment having a larger cross-section than the lower segment. The axial lengths of each segment are similar. The cross-sectional area at the connection between the upper end of the hammer core body and the piston is Sn, and the cross-sectional area at the impact point at the lower end of the hammer core body is S1, where Sn ≥ 2S1. This utility model employs a discontinuous cross-section design to improve the energy transfer efficiency during hammer strikes.
Owner:ZHEJIANG YONGAN CONSTR MASCH CO LTD +1

A pet resin composition, and a method of preparing and using the same

ActiveCN119242000Breduce crystallizationreduce crystallinity
The application belongs to the technical field of engineering plastics, and particularly relates to the field of ultrasonic welding PET compositions, and discloses a PET resin composition which comprises the following components: 60-75 parts of PET resin, 5-15 parts of PETG resin, 2-5 parts of a toughening agent, 18-25 parts of glass fiber, and 0.2-0.8 parts of a nucleating agent. The application provides a PET composition with high ultrasonic welding strength, so that the integrity and overall strength of a PET product after ultrasonic welding are improved, and the cracking and separation of the welding position can be effectively avoided. The PET resin composition of the application is applied to a PET resin material product which needs to be ultrasonically welded, and the related product prepared by the PET resin composition has excellent ultrasonic welding strength and excellent mechanical properties.
Owner:KINGFA SCI & TECH CO LTD

Lengthened linear bearing

The utility model discloses a lengthened linear bearing, and relates to the technical field of bearings, the lengthened linear bearing comprises a guide rail for the linear bearing, the linear bearing comprises a shell, a retainer and a ball, a flange is arranged at the bottom end of the shell, the interior of the shell is hollow, the retainer is installed on the inner wall of the hollow, and the ball is clamped in the retainer. The linear bearing has the advantages that the rolling connection of the balls is smooth, the frictional resistance is reduced, the operation efficiency is improved, the service life is prolonged due to the fact that the retainer is made of wear-resistant plastic, the number of the balls can be correspondingly set according to the length of the linear bearing, and the service life of the linear bearing is prolonged. The linear bearing is simple in structure, good performance under different length requirements is guaranteed, maintenance is convenient, the linear bearing can stably and efficiently work in various industrial applications through the design, and reliable supporting and guiding are provided for operation of mechanical equipment.
Owner:浙江金顿自动化制造有限公司

Resonant converter based on multilayer insulated wire and magnetic core integrated structure and energy transmission method

PendingCN121863868AReduce AC lossesSolving performance consistency issuesEfficient power electronics conversionCircuit arrangementsCapacitanceResonant converter
The invention discloses a resonant converter based on a multilayer insulated wire and magnetic core integrated structure and an energy transmission method. The resonance unit comprises at least one resonance capacitor and at least one resonance inductor; the switch unit is used for converting direct current input into a high-frequency alternating current signal and applying the high-frequency alternating current signal to the resonance unit; the resonant converter further comprises an energy transmission unit, the energy transmission unit comprises a magnetic core, a primary winding and a secondary winding, and the primary winding adopts three layers of insulated wires and is wound on the magnetic core according to a preset electromagnetic field distribution model; wherein the winding structure of the primary winding and the physical structure of the magnetic core are cooperatively configured, so that the leakage inductance of the energy transmission unit is precisely limited as a first target value, and the winding structure is optimized to reduce the alternating current winding loss under the working frequency; the technical problem that the overall efficiency and consistency are difficult to consider due to the fact that a transformer in an existing resonant converter is large in leakage inductance discreteness and high in high-frequency loss can be solved.
Owner:DONGGUAN SEGOTEP ELECTRONICS TECH

An isolated power supply circuit and an electric energy meter

This invention relates to the field of switching power supply technology, specifically providing an isolated power supply circuit aimed at solving the problems of low integration, poor output consistency, and high cost and energy consumption in existing multi-channel isolated power supplies. To this end, the invention comprises: a power control and drive module, an isolation module, a rectification, filtering, and voltage regulation module, an anti-interference module, and a load module. The power control and drive module receives power, generates a drive voltage signal, and outputs the drive voltage signal to the isolation module, while simultaneously outputting a ground potential voltage signal to the anti-interference module. The isolation module achieves voltage signal isolation output through internal electromagnetic coupling, outputting the isolated voltage signal to the rectification and filtering module. The anti-interference module outputs the filtered, interference-free ground potential voltage signal to the rectification and filtering module. The rectification and filtering module performs rectification and filtering processes, outputting a stable voltage signal to the load module. This invention features high integration and high output consistency.
Owner:QINGDAO ITECHENE TECH CO LTD

Mn < 2 + > ion doped enhanced upconversion red light emitting scandium aluminate and synthesis method thereof

The invention discloses manganese ion doped enhanced up-conversion red light emitting scandium aluminate and a synthesis method thereof, and belongs to the technical field of up-conversion luminescent materials. The molecular formula of the up-conversion luminescent material provided by the invention is Ba (2-x) MnxSc (0.67) Yb (0.3) Er (0.03) AlO5 (x = 0-0.5), and the preparation method is a high-temperature solid phase method. The radius of manganese ions is much smaller than that of barium ions, so that the manganese ions easily enter a main substrate Ba2ScAlO5 and influence a crystal field, and oxygen vacancies are generated in the material. Defects formed by the oxygen vacancies can increase the energy transfer efficiency of the material, so that the sensitization and emission capabilities of rare earth ions are improved, and the luminescence characteristic of the material is improved. The obtained Ba1. 6Mn0. 4Sc0. 67Yb0. 3Er0. 03AlO5 has the maximum red light emission intensity at the red light wavelength of 664nm under the excitation of 980nm near infrared laser, and compared with the red light emission intensity of Ba2Sc0. 67Yb0. 3Er0. 03AlO5 obtained in a contrast, the red light emission intensity of the Ba1. 6Mn0. 4Sc0. 67Yb0. 3Er0. 03AlO5 is improved by nearly 27.4 times. The manganese ion doped scandium barium aluminate up-conversion luminescent material prepared by the invention has excellent single red up-conversion luminescence, and meanwhile, the preparation method is simple, good in controllability, high in yield and more energy-saving and environment-friendly in preparation process, and is suitable for industrial popularization.
Owner:HENAN HONCHOO TECH LTD