41results about How to "Improve energy transfer efficiency" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

This invention provides a method for preparing a deuterated compound and an organic electroluminescent device. The structure of the deuterated compound is shown in Formula I: Formula I; wherein fragment 1 is selected from:; fragment 2 is selected from:. The method for preparing the deuterated compound includes reacting compound A with compound B1 or B2, and then reacting the resulting intermediate compound with compound C1 or C2 to obtain deuterated compound I-1 with fragment 1 being b1 and fragment 2 being c1 or c2, or deuterated compound I-2 with fragment 1 being b2 and fragment 2 being c1 or c2; and reacting deuterated compound I-2 with heavy water to obtain deuterated compound I-3 with fragment 1 being b2 and fragment 2 being c3 or c4. The deuterated compound prepared by this method can effectively reduce the nonradiative energy loss of the TADF sensitization system, improve the thermal stability and excited-state lifetime of the material, thereby optimizing energy transfer efficiency, suppressing device efficiency roll-off, and significantly extending the lifespan of OLED devices.

The invention provides a method and a system for exciting an MEMS resonance module, the provided MEMS resonance module at least has a high-frequency mode and a low-frequency mode which are designed according to a target frequency integer ratio, a parametric excitation signal is applied to the MEMS resonance module to excite the low-frequency mode, the parametric excitation signal is a frequency signal with continuously changing frequency, and the frequency of the parametric excitation signal changes continuously. The eigenfrequency of the parameterized excitation signal is obtained, the eigenfrequency is the frequency of the parameterized excitation signal when the ratio of the first actual measurement frequency of the high-frequency mode to the second actual measurement frequency of the low-frequency mode is the target frequency integer ratio, the first actual measurement frequency is the frequency of the low-frequency mode in the excitation process of the parameterized excitation signal, and the second actual measurement frequency is the frequency of the parameterized excitation signal in the excitation process of the low-frequency mode. The second actual measurement frequency is the frequency of the high-frequency mode in the excitation process of the parameterized excitation signal, a target excitation signal is applied to the MEMS resonance module, and the frequency of the target excitation signal is the eigenfrequency, so that the energy transfer efficiency between different modes of the MEMS resonance module is improved, and the sensitivity of the MEMS resonance module is improved by integer multiples.

The utility model discloses a sorting trolley based on linear motor relates to automatic sorting technical field of commodity circulation, including mounting bracket, the both ends fixed connection of mounting bracket have gyro wheel group, and the one end of mounting bracket is installed with electric roller, the bottom fixed setting of mounting bracket has secondary board. The utility model has the beneficial effect that: through the power supply mode that trolley collector is contacted with slide contact line, compared with wireless power supply, energy transmission efficiency is higher, and cost is lower, and there is no electromagnetic interference problem, can provide the continuous stable electric power for sorting trolley, utilize the elasticity of spring and the rotation of rotary frame, make the current collector brush can be lifted upwards by slide contact line after installation, and always adhere to slide contact line under the action of spring pressure, automatically compensate the installation error and deformation of slide contact line, guarantee the reliability and continuity of contact.

The utility model discloses a quick action changing device for a multi-knuckle clamping jaw in the field of hydraulic control systems, which is characterized in that a hydraulic oil tank is connected with an inlet of a constant delivery pump, an outlet A1 of the constant delivery pump is connected with an oil inlet B2 of a priority two-position three-way valve, an oil outlet B3 of the priority two-position three-way valve is communicated with an oil inlet B5 of a three-position three-way valve, and the three-position three-way valve is communicated with an oil outlet A1 of a three-position three-way valve. The three-position three-way valve is provided with an oil outlet A4 and an oil outlet A5, an oil way between the oil outlet A5 of the three-position three-way valve and a control oil port A2 of the priority two-position three-way valve is connected with an oil inlet k2 of the two-way adjusting overflow valve through a parallel oil port H1, an oil outlet t1 of the two-way adjusting overflow valve is connected with the hydraulic oil tank, the oil outlet A4 of the three-position three-way valve is connected with an inlet A3 of the energy accumulator, and the oil outlet t2 of the energy accumulator is connected with an oil outlet t3 of the priority two-position three-way valve. And the inlet A3 of the energy accumulator is also connected in parallel with the action executing mechanism. According to the utility model, the working state of the quick-retracting oil cylinder and the working state of the quick-stretching oil cylinder can be quickly switched, the system response time is shorter, the action of the actuating mechanism is quicker, and the energy transmission efficiency is higher.

The utility model discloses a can realize earphone wireless charging module of two -way data communication, including charging storehouse casing, earphone containing cavity, fixed magnetic ring, bottom plate, wireless transmitting module, earphone receiving module, the earphone containing cavity is established at the top of charging storehouse casing, the fixed magnetic ring fixedly connected in earphone containing cavity inboard, the bottom plate fixedly connected at the bottom of charging storehouse casing, wireless transmitting module fixedly connected in charging storehouse casing inside, earphone receiving module places in earphone containing cavity inside, and the integrated design of flexible circuit board and decoding chip realizes high -speed data transmission in limited space, and the security and functionality are taken into account.

The invention relates to the technical field of wireless charging, and relates to a wireless charging device and a control method of the wireless charging device, and the wireless charging device comprises a magnet which is arranged in the wireless charging device corresponding to a wireless charging area; and the transmitting resonance circuit is configured to wirelessly charge the to-be-charged equipment at the preset charging power under the preset resonant frequency. According to the wireless charging device, the resonant frequency capable of avoiding interference of a magnet on wireless charging and the charging power capable of slowing down the heating speed of the wireless charging device are designed for the transmitting resonant circuit in the wireless charging device, and the energy transmission efficiency between the transmitting end of the wireless charging device and the receiving end of the to-be-charged device can be improved.

The invention discloses a low-cost high-efficiency wireless energy transmission emission array irregular tiling method, which belongs to the technical field of antenna design, and comprises the following steps: constructing a candidate matrix so as to construct an aperture coverage problem of an emission antenna array in a microwave wireless energy transmission system into an accurate coverage problem; based on an accurate coverage problem, obtaining a first excitation coefficient of each antenna unit in the transmitting antenna array, and constructing a candidate matrix containing excitation information; extracting a second excitation coefficient from the candidate matrix containing the excitation information, and constructing a calculation model of beam collection efficiency (BCE) according to the second excitation coefficient; and solving the calculation model by taking maximization of the BCE as a target to obtain an antenna unit tiling scheme. By optimizing the splicing layout, the actual BCE approaches the theoretical limit, and the high-energy transmission efficiency of the system is ensured.

Disclosed is a head for a handle, which is configured so as to be capable of discharging a liquid medicine stored therein to the outside when pressurized by an external force. The handle head includes: an inlet chamber part coupled to the handle main body, the interior of which is provided with a liquid medicine filling space; a feeder part which is connected to the inlet chamber part and is formed so as to inject the liquid medicine into the liquid medicine filling space; a piston installed inside the inlet chamber portion and configured to push the liquid medicine filled in the liquid medicine filling space when pressurized by an external force; an elastic support member formed to elastically support the piston; and an outlet chamber portion coupled to the inlet chamber portion and configured to discharge the liquid medicine by pressurization of a piston, in which an end portion of the piston defines a portion of a liquid medicine filling space.

The application provides an organic electroluminescent device and an electronic device. The organic electroluminescent device comprises a cathode, an anode and an organic layer. The organic layer comprises an organic light-emitting layer, the organic light-emitting layer comprises a first compound and a second compound; the first compound is selected from a compound shown in formula 1; and the second compound is selected from a compound shown in formula 2 or formula 3.

The utility model discloses a frequency modulation matching circuit and electronic equipment, and relates to the technical field of radio frequency power supplies. Wherein the output end of the system-on-chip circuit is connected with the input end of the digital frequency synthesis circuit; the output end of the digital frequency synthesis circuit is connected with the input end of the signal processing circuit; the output end of the signal processing circuit is connected with the input end of the impedance matching circuit; the first output end of the impedance matching circuit is connected with a load; the input end of the sampling circuit is connected with the second output end of the impedance matching circuit, and the output end of the sampling circuit is connected with the input end of the system-on-chip circuit. Therefore, the load is monitored in real time, the parameters of the impedance matching circuit are dynamically adjusted, the energy transmission efficiency is improved, the digital frequency synthesis technology is adopted, microsecond-level frequency switching can be achieved, the high-frequency frequency modulation requirement is met, high-frequency resolution is provided, and the precision and stability of radio-frequency signals are ensured.

This invention discloses a method for preparing deuterated aromatic compounds. Using aromatic compounds as raw materials, a photocatalytic deuteration reaction is carried out with a deuterium source reagent under the action of a light source and a catalyst. The deuterated aromatic compounds are obtained after separation and purification. The catalyst includes at least one photosensitizer, or a combination of it with any one or more photocatalysts. The preparation method of this application features mild reaction conditions, simple operation, and high yield.

The application provides a connecting structure and a vehicle. The connecting structure comprises a connecting part, the connecting part comprises a main plate and a side plate connected to the edge of the main plate, the main plate extends along a first direction, the side plate protrudes along a second direction relative to the main plate, the first direction is perpendicular to the second direction, the side plate is suitable for being connected with a longitudinal beam and a shotgun beam of the vehicle, and the end of the side plate away from the main plate is provided with a turn-up edge suitable for being connected with a mounting vertical plate of the vehicle. Through the arrangement, the mounting vertical plate, the longitudinal beam and the shotgun beam are connected together, the connection strength of the front end of the longitudinal beam and the shotgun beam with other parts of the vehicle body is ensured, the force transmission path of the vehicle has sufficient coverage range and support strength in the transverse direction, the energy transmission effect of the shotgun beam is improved, the role of the shotgun beam in the MPDB and small offset working conditions is fully played, the penalty of the MPDB is reduced, and the structure evaluation in the small offset working condition is improved.

The utility model provides a charging circuit, a base and a toothbrush assembly, and the charging circuit is applied to a charging base and comprises a power supply processing circuit, an input detection circuit, a wireless charging circuit and a charging control circuit. According to the wireless charging circuit, an inductor replaces a traditional coil to serve as a core element of the wireless charging circuit, the modular arrangement of a power supply processing circuit and a charging control circuit is combined, the circuit structure is simplified, the hardware cost is reduced, and meanwhile the flat characteristic of the inductor is utilized to achieve compact layout and meet the requirement for a small-sized charging base; the charging control circuit dynamically drives and modulates the electric energy, so that the energy transmission efficiency and the system stability are improved. In addition, an input detection circuit is arranged, the state of input electric energy is reflected in real time, a charging control circuit adjusts a charging strategy according to the magnitude and change of sampling voltage, and the safety and efficiency of the charging process are ensured.

The invention relates to the technical field of light conversion materials, in particular to a quantum cutting material based on triplet-state ligand sensitized nanocrystals and a preparation method and application of the quantum cutting material. The quantum cutting material comprises a nanocrystal nucleus and a surface ligand layer, the nanocrystal nucleus is NaYF4 or NaGdF4, and Yb < 3 + > and Tb < 3 + > are doped; the surface ligand layer comprises a triplet state sensitization ligand capable of generating triplet state excitons through a reverse intersystem crossing process; the triplet-state sensitizing ligand is pyridine-2, 6-dicarboxylic acid, 1, 2, 4, 5-benzene tetracarboxylic acid or 1, 3, 5-benzene tricarboxylic acid, and a carboxylic acid group at the tail end of a molecule of the triplet-state sensitizing ligand and the Yb < 3 + > and the Tb < 3 + > on the surface of the nanocrystal nucleus form a coordinate bond; after the triplet state sensitizing ligand absorbs exciting light, generated triplet state exciton energy is transferred to the quantum cutting center. Powerful support is provided for solar cells, biological imaging devices, light-emitting devices and the like.

The application provides a lock opener, a passive electronic lock assembly, an electronic lock and an energy transmitter. The lock opener comprises a transmission member and a connecting coil. The transmission member has a first end and a second end. The first end is used for connecting with a mobile terminal. The connecting coil is connected to the second end. The connecting coil is used for nested cooperation with a receiving coil of the electronic lock. The lock opener can transmit the energy of the mobile terminal to a driving module of the electronic lock, so that the driving module can drive the electronic lock to switch between a locked state and an unlocked state. The lock opener of the application directly transmits the energy of the mobile terminal to the electronic lock through the nested cooperation of the connecting coil and the receiving coil, directly controls the switch of the electronic lock, and further does not need to set energy storage capacitors, MCUs and other components in the electronic lock, which is beneficial to simplifying the structure of the passive electronic lock assembly, reducing the volume of the passive electronic lock assembly and reducing the cost.

The application belongs to the technical field of organic electroluminescence, and relates to a nitrogen-containing compound, an organic electroluminescent device and an electronic device. The nitrogen-containing compound has a structure as shown in formula 1. When the nitrogen-containing compound is used in an organic electroluminescent device, the performance of the organic electroluminescent device can be significantly improved.

This invention provides a sonic atomizing device, including a housing with an internal partition dividing it into an upper medium cavity and a lower mounting cavity. The medium cavity contains an atomizing groove with two opposing vertical sidewalls. The partition includes a symmetrically arranged first loading surface and a second loading surface. The horizontal distance H between the first and second loading surfaces and the adjacent sidewalls is 0 to 50 mm, and they are inclined upwards at 10° to 50° relative to the horizontal. Atomizing plates are disposed on the first and second loading surfaces, facing the sidewalls and higher than their bottom edges. The inclination of the first and second loading surfaces controls the incident angle of the ultrasonic waves, achieving directional transmission of ultrasonic energy and ensuring that the ultrasonic propagation path forms an optimal angle with the sidewalls of the atomizing groove, thereby improving energy transfer efficiency and atomization uniformity.

The invention discloses a rail vehicle battery failure activation method and system based on dynamic minimum impedance, and the method comprises the steps: building a topological structure of an SI-MISO converter synchronously activated by a plurality of batteries, and controlling the SI-MISO converter through a cooperative control strategy based on TDM and phase interleaving; the minimum impedance frequency of the battery is detected through an online broadband impedance detection method, and a failure battery is diagnosed; and in an activation time window corresponding to the target battery to be activated, the SI-MISO converter is switched to a Buck mode, an activation time-varying duty ratio instruction is generated according to the minimum impedance frequency, zero static error tracking of the resonant frequency is realized by using the PR controller, and unity power factor activation current is injected to activate the failed battery. According to the invention, the problems of low detection efficiency and high hardware cost in the operation and maintenance of the existing railway vehicle battery and the problems of poor activation efficiency, poor effect and high safety risk in the traditional activation method are solved.