23 results about "Direct coupling" patented technology

The application belongs to the technical field of electric data processing, and particularly relates to a nonlinear unit construction method based on dimension expansion. The shell unit nodes are classified and information is stored; the normal of the shell unit is calculated; new nodes are expanded on the positive and negative sides along the normal according to the thickness, and corresponding three-dimensional solid units are generated; the junctions at the unit connections are specially processed to maintain the connectivity; and the original constraint conditions are converted and applied to the expanded new nodes. The method significantly improves the calculation accuracy and boundary adaptability, greatly reduces the development complexity of the nonlinear unit, and facilitates the direct coupling analysis of beams, shells, solids and other units in a unified three-dimensional system.

A double servo direct connection driving mechanism of Z axis of numerical control gantry machine tool, it contains a slide, a machining spindle and a driving unit, the slide has a combination board and two combination columns, the combination board and the combination columns form a combination groove together, the machining spindle is vertically placed in the combination groove, the driving unit includes two driving motors and two screw rods, each driving motor is arranged on both sides of the machining spindle and is located on the same axis with the machining spindle, thereby, the driving motor is arranged on both sides of the machining spindle and is located on the same axis with the machining spindle, and the machining feeding efficiency is effectively improved.

This invention belongs to the field of oil and gas pipeline inspection technology, and particularly relates to a wireless passive piezoelectric ultrasonic thickness measurement method and its ultrasonic thickness measurement system. This thickness measurement method, while ensuring relay coupling efficiency, cancels signal crosstalk caused by direct coupling between the excitation coil and the receiving coil through reverse-phase winding of the sub-coil, effectively improving the detection accuracy and result stability of oil and gas pipeline wall thickness. The thickness measurement method includes: determining the structural configuration of the wireless passive piezoelectric ultrasonic thickness measurement system; performing decoupling operations on the excitation coil and the receiving coil; determining the spatial arrangement and magnetic field distribution characteristics of the excitation coil and the receiving coil, and calculating the relay coupling region and structural parameters of the detection coil; determining the coupling parameters of the linear frequency modulated chirp signal used in the excitation process of the excitation coil, and generating the linear frequency modulated chirp signal; receiving the ultrasonic echo signal transmitted back by the detection coil, and performing pulse compression processing on the ultrasonic echo signal.

Disclosed are a motor parameter identification method and device, comprising: controlling the motor to operate in a speed closed loop and current closed loop mode according to a reference model of the motor, and obtaining direct-axis voltage, cross-axis voltage, direct-axis current, cross-axis current and motor speed; obtaining direct-axis estimated current and cross-axis estimated current according to an adjustable model of the motor, the direct-axis voltage and the cross-axis voltage; obtaining direct-axis error current according to the direct-axis current and the direct-axis estimated current, and obtaining cross-axis error current according to the cross-axis current and the cross-axis estimated current; adjusting the direct-axis estimated inductance and the cross-axis estimated inductance in the adjustable model through feedback of an adaptive rate model, so that the direct-axis error current and the cross-axis error current converge; the adaptive rate model and the adjustable model adopt a salient pole ratio of the motor. The salient pole ratio of the motor is introduced in the application, the direct-axis inductance parameter and the cross-axis inductance parameter are decoupled and processed, direct coupling of the direct-axis inductance estimated value and the cross-axis inductance estimated value is avoided, and the adaptive rate model is simplified.

A system including a plasma chamber configured for generating plasma with a lower electrode located within an electrostatic chuck (ESC), and an upper electrode disposed above the lower electrode. The system includes an edge ring surrounding the lower electrode. A main power generator is electrically coupled to the lower electrode and the edge ring via a common node, and is configured to supply a pulsed direct current (DC) power signal to the common node. A variable capacitor is electrically coupled between the common node and the edge ring, wherein the variable capacitor splits the pulsed DC power signal into a bias power signal delivered to the lower electrode and a tunable edge sheath (TES) power signal delivered to the edge ring. A high frequency power source is electrically coupled to the upper electrode and configured to supply a high frequency radio frequency (RE) power signal to the upper electrode.

This invention discloses a method for identifying coal and coal gangue based on capacitance tomography. It utilizes a differential capacitance tomography electrode sensor to collect capacitance measurement data of coal, coal gangue, or mixtures thereof within the measured area. Direct coupling capacitance between electrodes is canceled by applying an inverse excitation signal. The raw data is preprocessed, and stable and valid capacitance measurements are selected to form a data vector. A regularized iterative algorithm is used to solve for the dielectric constant distribution, combining a preset sensitivity distribution function. An initial solution is obtained through regularization, and then iteratively updated until convergence. Image reconstruction is performed based on the dielectric constant distribution. After normalization and edge detection, a capacitance tomography image representing the location, size, and dielectric differences of the materials is generated. The image grayscale values ​​are analyzed, and coal and coal gangue regions are automatically identified and marked according to a preset dielectric constant threshold range. Simultaneously, their centroid coordinates and equivalent areas are calculated, achieving non-destructive and accurate identification of the mixture components.

1. Name of the product in this design: Oil-free air compressor (single-cylinder direct drive). 2. Purpose of this design: A single-cylinder, direct-drive, small, oil-free air compressor for compressing gas. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application discloses a kind of satellite transceiver's dual antenna radio frequency channel isolation circuit, comprising: circuit board, main input port, slave input port and signal processing chip;The input circuit of main input port is divided into two ways on the front of circuit board;First road passes to the back of circuit board and is divided into first subcircuit and second subcircuit;First subcircuit is connected to the back B3M frequency conversion processing circuit by first intermediate layer;Second subcircuit is connected with B1M frequency conversion processing circuit;Second input circuit passes to the back and is connected with auxiliary frequency conversion circuit;The input circuit of slave input port passes to the back and is divided into third input circuit and fourth input circuit;Third input circuit passes to the front and is connected with B3S frequency conversion processing circuit;Fourth input circuit is connected to the front B1S frequency conversion processing circuit by second intermediate layer.The present application carries out frequency conversion processing to slave input signal and main input signal respectively on the front and back of circuit board, reduces the direct coupling and radiation interference between signals.

The application discloses a T-shaped conductor track bus system with high efficient conduction and heat dissipation characteristics, and relates to the technical field of power distribution bus. The inside of the integrated heat dissipation shell is provided with at least three-phase parallel arranged T-shaped conductors, high-thermal-conductivity insulation medium for directly conducting the heat generated by the T-shaped conductors is arranged between the integrated heat dissipation shell and the T-shaped conductors, and the high-thermal-conductivity insulation medium is used for directly conducting the heat received by the high-thermal-conductivity insulation medium to the integrated heat dissipation shell; in the T-shaped conductor track bus system with high efficient conduction and heat dissipation characteristics, the fixing head of the T-shaped conductor is directly coupled with the embedded slot of the shell body, the U-shaped / concave large-area coating of the high-thermal-conductivity insulation medium is matched, a solid heat conduction path from the T-shaped conductor to the shell body is established, and the thermal resistance is reduced; and the longitudinal deep groove naturally formed by the T-shaped conductor array constitutes a low-wind-resistance natural air duct.

This invention discloses a method for calculating noise through direct coupling between a worm gear structure and its acoustic field, belonging to the field of noise prediction technology for mechanical transmission systems. The method includes: decomposing the time-domain torque into DC and AC components; establishing a structure-acoustic field coupled finite element model with a matching layer (PML); solving for steady-state prestress using the DC component; treating the AC component as a disturbance under prestress, and directly solving the coupled dynamic equations through harmonic response to obtain the full-field sound pressure response in one step; finally, extracting the sound pressure level distribution to achieve noise prediction. This invention overcomes the shortcomings of the traditional "two-step method" (cumbersome process, neglecting the acoustic radiation of the worm gear itself) by linearizing the prestress and using a one-step direct coupling solution, achieving fast and high-fidelity noise prediction under steady-state conditions, significantly improving computational efficiency and accuracy.

Package assembly (100, 300) for integrated circuits, IC package assembly comprising the following: several electrical contacts (330) configured to transmit electrical signals from an integrated circuit; and Several solder contacts (350) are coupled to the electrical contacts (330) and arranged to couple directly to pins (208) of a socket assembly (104) to provide an electrical connection between the pins (208) of the socket assembly (104) and the several electrical contacts (330), wherein the solder contacts have a melting point between 55-80°C, and wherein the solder contacts provide electrical coupling between the pins and the several electrical contacts at load forces of less than 0.25 N.

This application provides a knowledge graph-driven power grid fault root cause analysis system and method, comprising: processing data of different time granularities using a time-series alignment algorithm based on an initial event sequence to obtain an ordered event list on a unified time axis; if the electrical connection strength of adjacent events in the ordered event list exceeds a preset threshold, it is determined to be direct coupling, and a preliminary causal chain is identified; for the preliminary causal chain, a protection logic rule base is obtained, and matching protection device operation modes are extracted from it to obtain extended causal relationships; through the extended causal relationships, a fault propagation network is constructed using a graph model, and the propagation paths between network nodes are determined to obtain a complete event chain; if there are delayed action events in the complete event chain, the key turning point is determined by comparing the delay duration with the unified time axis; based on the root cause classification results, an evolution path report is generated, the missing links in the report are identified, and supplementary preventive measures suggestions are obtained.

The invention belongs to the technical field of electric data processing, and particularly relates to a nonlinear unit construction method based on dimension expansion, which comprises the following steps: classifying shell unit nodes and storing information; calculating the normal direction of the shell unit; new nodes are expanded along the positive and negative sides in the normal direction according to the thickness, and corresponding three-dimensional entity units are generated; specially processing junctions at the connection of the units to maintain connectivity; and original constraint conditions are converted and applied to the expanded new nodes. According to the method, the calculation precision and the boundary adaptability are remarkably improved, the development complexity of nonlinear units is greatly reduced, and direct coupling analysis of multiple units such as beams, shells and entities in a unified three-dimensional system is conveniently achieved.

The invention relates to a method for operating a power tool, a control system for a power tool, a power tool and an extension device 300. The power tool is operated using a power source, a control system and a device interface. The device interface is designed for directly coupling a power source or an extension device 300, which supplies the power tool with electrical energy, to the device interface and for establishing at least one electrical connection. During the execution of the method, operating parameters of the power source are acquired by means of the at least one electrical connection via the device interface and evaluated in order to determine whether the power source or the extension device 300 is directly coupled to the device interface. The power tool can be controlled by the control system after the end of the process in accordance with the result of the evaluation.

This invention belongs to the field of renewable energy conversion technology and discloses a method for configuring a PEM electrolyzer array based on minimizing cost. The method includes: S1: establishing a photovoltaic model and an electrolyzer model; S2: setting the initial photovoltaic array configuration scale and inputting local meteorological data; S3: calculating hydrogen production and levelized cost of hydrogen; S4: optimizing the calculation to determine the optimal photovoltaic array configuration scale with the goal of minimizing cost. This reduces the DC-AC-DC conversion process, thereby reducing energy transmission losses and improving the efficiency of the hydrogen production system; and by configuring based on minimizing hydrogen cost, it lowers the hydrogen production cost of the PV-PEM direct coupling system.

The application provides a Coriolis vibration gyroscope based on differential standing wave effect, which adopts a double-disc resonant gyroscope (DRG) three-layer structure. The structure comprises two mode-matched DRG ring structure masses and eight center coupling beams uniformly distributed around the center, and the overall structure layer is divided into three layers along the thickness direction, from top to bottom, which are an electric domain layer, an insulation layer and a bearing layer. In the driving mode of the inner and outer DRG structures, the Coriolis force is detected in the detection mode, and the mode is 45° different from the driving mode. The driving mode and the detection mode frequency of the inner and outer DRG structures are consistent, the inner and outer rings are connected through the center coupling beam, and the direct coupling of the driving and detection directions is realized. By using the differential standing wave effect, the detection capacitance change directly reflects the relative (differential mode) displacement of the two masses, and the direct and accurate measurement of the relative displacement is realized.

Provided is an RFID tag capable of communicating while in contact with a conductor and having excellent impact resistance.　The RFID tag 1 of the present invention comprises: a first waveguide part 20; a resonance part 30 directly coupled to the first waveguide part 20; a second waveguide part 40 disposed with a gap 61 from the resonance part 30 and electromagnetically or electrostatically coupled to the resonance part 30; an RF chip 50 directly coupled to the resonance part 30; and an insulating material 10 to which the first waveguide part 20, the resonance part 30, and the second waveguide part 40 are fixed. The resonance part is disposed between the first waveguide part and the second waveguide part. By bringing the conductor into contact with the waveguide part and electrically connecting the conductor to the waveguide part, it is possible to obtain the same effect as that obtained by increasing the area of the waveguide part, and radio waves can be received from a wider range.

This application provides a half-cavity directly coupled magnetic alloy high-frequency cavity, relating to the field of ion accelerator technology. The magnetic alloy high-frequency cavity is connected to a radio frequency power source. The magnetic alloy high-frequency cavity includes: a cavity body comprising two symmetrically arranged half-cavities; a vacuum pipe disposed inside the cavity body and connecting the two half-cavities; multiple magnetic alloy rings disposed in a single half-cavity and coaxially arranged with the vacuum pipe, the multiple magnetic alloy rings being parallel to each other; a coupling device for electromagnetically coupling the multiple magnetic alloy rings located in a single half-cavity to form an overall load unit; and an impedance transformation unit disposed on one side of each half-cavity and electrically connected to the overall load unit, used to transform the impedance of the overall load unit to an impedance matching the characteristic impedance of an external feed line, so as to connect to the radio frequency power source through the external feed line. This application, through a half-cavity fully coupled design, eliminates inter-path coupling, ensuring that the port impedance test value is consistent with the actual value, and is easy to adjust.

A frame structure (2) includes an inner frame (3) and a plurality of outer frames (4) coupled to the inner frame (3). The inner frame (3) has at least one first coupling member (31) disposed on an outer periphery thereof, and the first coupling member (31) extends along at least a first direction (X) on the outer periphery. The outer frame (4) is detachably coupled to the inner frame (3) along the first direction (X) so that the inner frame (3) is surrounded by the outer frame (4). Each outer frame (4) has at least one second coupling member (41) disposed on an inner periphery thereof. Each outer frame (4) is coupled to the inner frame (3) by the second coupling member (41) and the first coupling member (31) of the inner frame (3) being engaged with each other along the first direction (X). Assembling the inner frame (3) and the outer frame (4) by direct coupling can reduce the number of assembly components and improve assembly and rework convenience. A backlight module and a display device including the frame structure (2) are also provided.

The application relates to a kitchen appliance live broadcast path switching method, system, device and storage medium, the method comprising: establishing a communication link between a first device and a relay device based on an MQTT protocol; establishing a communication link between the relay device and a second device based on a Bluetooth protocol; the first device generates a live broadcast path switching instruction by acquiring network state information of the second device synchronized by the relay device; and the relay device controls live broadcast path switching of the second device according to the live broadcast switching instruction. The kitchen appliance live broadcast path switching method supports multiple network environments, the first device and the second device communicate through the relay device, can intelligently judge and switch to the optimal streaming path, reduces the direct coupling between devices and the complexity of communication, and improves the overall reliability and stability of communication.

The invention relates to a rear derailleur for a bicycle gearing system comprising: a base element which can be fitted to a bicycle frame; and a movable element which is coupled to the base element by a pivot mechanism and which can be displaced relative thereto in a pivotably movable manner, wherein the pivot mechanism is pivotably movable both relative to the movable element and relative to the base element. The rear derailleur comprises for easier adjustment of the chain tension a blocking device which is configured to at least temporarily secure the movable element relative to the base element, wherein the blocking device is configured in such a manner that the pivot mechanism can be temporarily secured by a direct coupling relative to the base element or relative to the movable element in at least one predetermined blocking position.

The application discloses a kind of high-temperature superconducting generator coil critical current and ac loss accurate calculation method, based on J model calculation critical current, significantly improve the calculation efficiency.To solve the problem of high-temperature superconducting coil ac loss calculation error is larger, the application uses the direct coupling method without simplifying boundary conditions to improve the calculation precision of stator coil ac loss.In order to solve the problem of long simulation time and convergence difficulty in the process of rotor ac loss calculation, the application proposes a technology named rotating domain exchange, realizes the accurate calculation of rotor ac loss in real dynamic electromagnetic environment, and the calculation result proves that in high-temperature superconducting generator with small air gap width and many turns of rotor coil, rotor coil ac loss cannot be ignored.The popularization of the application has important significance for performance evaluation and optimization design of high-temperature superconducting generator coil.