1082 results about "Electromagnetic coupling" patented technology

An aspect of the present invention is an antenna pattern used in a UHF-band RFID inlay. The antenna pattern includes a first element and a second element. The first element is formed to include a loop portion and an emission portion. The loop portion includes a pair of electric power supply portions. The emission portion is connected to the loop portion, and extends line-symmetrically from the loop portion. The emission portion operates as a dipole antenna to emit a radio wave whose half wavelength is a first length. The second element is formed apart from the first element. The second element operates as a dipole antenna by electromagnetic coupling with the first element to emit a radio wave whose half wavelength is a second length. The second length is different from the first length.

The invention relates to the technical field of dynamic correction and intelligent compensation of measured data of a current sensor, and discloses a self-adaptive data compensation method for the current sensor, which comprises the following steps of: acquiring an original output signal and environmental parameters in real time, identifying multi-dimensional error sources such as temperature drift, nonlinear error and electromagnetic coupling error, establishing an influence factor model, and calculating the dynamic correction and intelligent compensation of the measured data of the current sensor. Dynamic compensation is realized by fusing directivity judgment of each error source and a weighting mechanism, and online learning and model parameter updating are carried out by introducing a long-short-term memory network structure, so that the problems of poor environmental adaptability, limited compensation precision and lagging model updating in the prior art are effectively solved.

The invention provides a power grid cable real-time current detection method and system, and the method comprises the steps: carrying out the multi-frequency-band synchronous collection of the current of a cable shielding layer for a high-voltage DC power transmission system with multiple loops laid in parallel, and obtaining the time-space information data; an electromagnetic coupling transfer function is calculated based on the data, and an electromagnetic coupling coefficient matrix is constructed, so that near-end cross induction current is separated to obtain a real current signal; establishing a cable dispersion model by using a real current signal, and performing fault feature recognition by combining a time domain criterion, a frequency domain criterion and time-frequency joint entropy analysis; and finally, calculating a credibility index by combining the temperature gradient and the electromagnetic environment parameters, correcting a preliminary judgment result and generating a protection control signal. According to the method, the near-end cross induction current and the real fault current can be effectively distinguished, the problem that the protection system of the multi-end high-voltage direct current system operates by mistake or does not operate in the power-on transient period is solved, and the reliability of the system is improved.

The invention discloses a memory read-write consistency testing method and system, and relates to the technical field of memory testing. Comprising the steps of S1, performing crosstalk coupling modeling: constructing an interlayer crosstalk coupling transfer function according to a quantum tunneling current curve and a three-dimensional parasitic parameter matrix; s2, constructing a three-dimensional failure probability model: obtaining a plane coupling error distribution diagram, and generating an interlayer crosstalk coefficient matrix according to the interlayer crosstalk coupling transfer function; and S3, identifying electromagnetic coupling hot spot regions: determining a risk level of each region according to the three-dimensional failure probability, setting test parameters according to the risk levels, and performing read-write test on the to-be-tested memory through the test parameters. According to the method, three-dimensional quantitative modeling of cross-layer interference is realized, so that the detection range is expanded from a plane to a three-dimensional structure, and a blind area of interlayer electromagnetic coupling in a traditional method is solved.

The invention belongs to the technical field of antenna engineering, and particularly relates to an ultra-wide-band low-profile phased-array antenna, which realizes broadband impedance matching characteristics and effectively expands the working bandwidth of the antenna by optimizing a dipole arm structure and introducing a matching branch knot and linear tapered slot composite structure on a radiation unit layer; on the array architecture level, an electromagnetic metasurface technology is adopted, array current distribution is improved through a periodic artificial electromagnetic structure, the active standing-wave ratio is remarkably reduced, the scanning angle of an array is widened, and meanwhile high compression of a system profile is achieved; on the structural design level, a three-dimensional composite structure of a transverse metal floor, a longitudinal radiation layer and a transverse metasurface layer is innovatively constructed, and the overall section height is reduced to 0.137 lambda Low (lambda Low is the lowest working frequency wavelength) through electromagnetic coupling and space folding technologies; in conclusion, the ultra wide band (the relative bandwidth is greater than or equal to 90%) and the low profile (lt; and the method is suitable for a new generation of broadband phased array radar system.

An electronic device may be provided with peripheral conductive housing structures, a rear wall, a first antenna, and a second antenna. The first antenna may have a resonating element formed from the peripheral conductive housing structures. The second antenna may have a folded antenna element overlapping the first antenna. The folded element may be disposed on at least three sides of a substrate. The folded element may follow a meandering path along at least two of the sides. A first end of the folded element may be coupled to a positive feed terminal. A second end of the folded element may be shorted to a conductive chassis. The folded element may exhibit minimum peak current magnitude at a surface of the substrate facing the rear wall, minimizing electromagnetic coupling between the first and second antennas and optimizing a radiation pattern of the second antenna through the rear wall.

The present invention relates to the field of integrated circuit technology, and in particular to a method and system for printed circuit board layout. The method comprises the following steps: obtaining printed circuit board data; preprocessing the printed circuit board data to obtain standard printed circuit board data; identifying component features of the standard printed circuit board data to generate circuit board component feature data; extracting power feature information of the standard printed circuit board data to obtain circuit board power feature data; identifying the direction of signal lines of the circuit board component feature data to obtain signal line data; the present invention uses data processing technology, pattern recognition technology, feature mapping technology and deep learning technology to perform electromagnetic coupling analysis on printed circuit board data, and adjusts and optimizes the printed circuit board layout based on the electromagnetic coupling analysis data, thereby ensuring the accuracy of printed circuit board design.

The invention relates to the technical field of quantum sensing and ocean detection, and discloses an ocean magnetic field sensor based on an NV color center and an ocean magnetic field measuring method.The sensor comprises a cylindrical pressure-resistant cabin, an optical platform arranged in the pressure-resistant cabin and a main control panel; a laser, a beam shaping unit, a dichroscope, a beam shaping lens group, an objective lens, a diamond NV color center chip, a plano-convex lens I, a band-pass filter and a photoelectric detector are mounted on the optical platform; two microstrip loop antennas are mounted on the outer side of the diamond NV color center chip; an FPGA + ARM dual-core processor, a digital lock-in amplifier and two microwave signal generators are installed on the main control board, and the microwave signal generators are connected with the microstrip loop antenna and achieve electromagnetic coupling with the diamond NV color center chip. The invention has the advantages of high sensitivity, good long-term stability and strong anti-interference capability, and provides a new generation of quantum sensing solution for applications such as ocean geomagnetic monitoring and underwater target identification.

The invention relates to the technical field of unmanned aerial vehicles, and discloses an unmanned aerial vehicle automatic capture system based on artificial intelligence, and the system comprises a dynamic environment sensing module and a capture decision module. The multi-modal spatial data of the target unmanned aerial vehicle are collected in real time, and the multi-modal spatial data comprise three-dimensional coordinates (fusing data of a multispectral radar and a laser array sensor), flight attitudes and electromagnetic characteristic data; after dynamic interference suppression is carried out on the data, processing is carried out through a decision processing layer (including a data cleaning module and a collaborative modeling module); the data cleaning module completes track segmentation, noise filtering and standardized calibration; the collaborative modeling module is trained through multi-scene historical data, an electromagnetic interference analysis layer of the collaborative modeling module generates electromagnetic coupling characteristic data, a trajectory correction layer models trajectory association and generates compensation trajectory field data, and a decision execution layer fuses the data and outputs a dynamic interception instruction. According to the system, through multi-modal fusion and dynamic modeling, the accuracy and adaptability of unmanned aerial vehicle capturing in a complex environment are improved.

The invention discloses an antenna optimization method and system based on a right trapezoid half-mode resonator. The method comprises the following steps: acquiring initial structure parameters of the right trapezoid half-mode resonator; constructing a three-dimensional electromagnetic field simulation model based on the initial structure parameters, calculating electromagnetic field distribution characteristics of the right-angled trapezoidal half-mode resonator through a finite element analysis method, and performing primary verification on the electromagnetic field distribution characteristics; generating an optimization objective function; carrying out iterative optimization on the geometric parameters of the right trapezoid half-mode resonator by adopting a genetic algorithm; re-calculating electromagnetic field distribution characteristics based on the optimized geometric parameters, and carrying out secondary verification on the electromagnetic field distribution characteristics; and adjusting the position of the feed port and the thickness of the metal patch according to the deviation direction. The method has the following advantages and effects that the problem that a traditional design method depends on experience trial-and-error or single-target optimization, and collaborative optimization of multiple parameters is difficult to achieve under the complex electromagnetic coupling effect is solved.

The invention provides a core wire decoupling method for online monitoring of insulation damage of a multi-core cable and a signal electromagnetic coupling injection device, and the method comprises the steps: modulating a cable insulation damage monitoring signal in a time-frequency domain; injecting the modulated monitoring signal into a multi-core cable through an electromagnetic coupling method; reflection signals generated by the core wires at the cable insulation impedance discontinuous points are received respectively; calculating a system propagation coefficient according to the received reflection signal, analyzing the discontinuity degree of the cable insulation impedance, and obtaining a cable insulation impedance parameter group; if the impedance discontinuity degree is not greater than the given threshold value, injecting the modulated monitoring signal again after a given time interval; and if the impedance discontinuity degree is greater than a given threshold value, decomposing the distribution parameters of the insulation impedance through a multi-core impedance decoupling method, identifying the core wire with insulation damage, and positioning the position of the core wire. According to the invention, positioning and mode identification can be realized for conventional cable insulation damage, and the problems of positioning and damage condition identification of cable insulation damage monitoring are solved.

The invention discloses an integrated circuit fault diagnosis and early warning system, and relates to the technical field of integrated circuit fault diagnosis and early warning. Comprising a signal acquisition and processing module used for acquiring and processing voltage and current signals of an integrated circuit and surrounding magnetic field signals; the electromagnetic coupling characteristic calculation module is used for calculating electromagnetic coupling characteristic parameters; the dynamic distortion index construction module is used for constructing a dynamic distortion index; the sensitivity evaluation module is used for carrying out sensitivity evaluation on the dynamic distortion indexes; the fault mode recognition module is used for performing fault mode recognition on the evaluation result to generate a fault category; the fault probability calculation module is used for calculating the fault probability according to the electromagnetic coupling characteristic parameters and the dynamic distortion indexes; and the hierarchical fault response module is used for jointly executing a hierarchical fault response strategy according to the fault category and the fault probability. Through accurate fault identification, a multi-stage response strategy and reliability improvement, stable operation and long-term reliability of the integrated circuit are effectively guaranteed.

The invention relates to the technical field of fault testing, in particular to a dry-type air-core reactor turn-to-turn short circuit monitoring method based on a magnetic field difference method. According to the method, regularization constraint is introduced in an initial baseline stage to construct a reference electromagnetic coupling matrix, a heat accumulation index is recursively analyzed based on three-phase current energy, a thermally-induced magnetic field drift model is fitted in combination with magnetic field residual errors, and combined with combined constraint of the reference electromagnetic coupling matrix and the thermal drift model, a three-phase electromagnetic coupling model is established. The normal thermally induced magnetic field drift component is dynamically stripped in real-time monitoring; and under the constraint of a reference electromagnetic coupling matrix, fitting and optimizing a current vector through weighted least square state estimation, and integrating magnetic field and current two-dimensional deviation to obtain a structure consistency deviation index for fault monitoring. According to the invention, monitoring is carried out in consideration of a linear electromagnetic transfer rule and nonlinear thermal drift compensation, a complex magnetic field environment and a variable load operation condition of the dry-type air-core reactor are adapted, and continuous and reliable monitoring guarantee is provided for long-term stable operation of equipment.

A device for detecting an approach of a part of a user's body and / or of a portable user equipment, housed on board a motor vehicle, including: a near-field communication antenna configured to transmit and receive signals at a high resonant frequency between 3-30 MHz. The antenna includes at least one winding extending continuously in the form of a set of rods such that the rods have a variable capacitance connected to the antenna and the antenna is able to generate a capacitance variation in response to the approach of a part of a user's body; a measurer for measuring, through electromagnetic coupling with the antenna, an impedance variation or a frequency variation of the antenna. The measurer having a series resonant frequency at the selected high resonant frequency and able to detect the approach of a portable user equipment or the approach of a part of the user's body.

The invention discloses an ultra-wideband balancer applied to high-power microwave measurement and a manufacturing method and device. The ultra-wideband balancer comprises a thick slot line layer, a microstrip line dielectric plate and a microstrip line layer, wherein the microstrip line dielectric plate and the microstrip line layer are stacked on one side of the thick slot line layer in the second direction, and the microstrip line layer is provided with an output port; the first input port and the second input port are respectively connected with an SMA connector, the phase difference of input signals of the two SMA connectors is 180 degrees, and the output port is connected with an SMA connector; a resonant cavity and a thick slot line resonator are formed between the first thick slot line structure and the second thick slot line structure, and the thick slot line resonator and the microstrip line layer form electromagnetic coupling, so that an input signal which is input by the first input port and the second input port and has a phase difference of 180 degrees is output from the output interface as an anti-phase microwave synthesis signal; the ultra-wideband balancer has larger power capacity, the problem that the power capacity is limited due to the fact that the slot line is too thin is solved, and the ultra-wideband balancer applied to high-power microwave measurement has larger power capacity.

The invention relates to an aluminum pipe local conduction regulation and control method, system and device based on dynamic electromagnetic field modulation and a medium, and the method comprises the steps: driving an electromagnetic coupling array to scan a target conduction region of an aluminum pipe, so as to construct a three-dimensional dynamic electromagnetic model; analyzing and generating a multi-band excitation parameter combination in a bandwidth constraint range according to the target conductivity gradient parameter; the method comprises the following steps: driving an electromagnetic coupling array by a multi-band excitation parameter combination, collecting an electromagnetic response spectrum of a target conductive area in real time, extracting an eddy current characteristic component set, calculating an obtained phase compensation amount, and dynamically adjusting an excitation phase difference and a power ratio of the electromagnetic coupling array to form a controllable standing wave interference field; and solving the Lyapunov function gradient difference between the node distribution characteristics of the standing wave interference field and the predicted value of the three-dimensional dynamic electromagnetic model so as to iteratively update the multi-band excitation parameter combination. According to the invention, high-precision dynamic regulation and control of the conductivity gradient of the aluminum tube are realized, the energy consumption is effectively reduced, and the stability of a standing wave interference field is enhanced.

The present invention discloses a battery thermal management simulation method, system and readable storage medium, wherein the method comprises: obtaining first simulation data of a battery management system after thermal management modeling of an aged battery; obtaining second simulation data of an energy management system after thermal management modeling of an aged battery; simulating and correcting the temperature distribution, cooling control and charge and discharge strategy of the aged battery based on the first simulation data and the second simulation data; and using the simulated corrected data to simulate the coupling effect of physical fields, which at least includes electromagnetic coupling. The present invention proposes a correction method for battery thermal management simulation, which corrects the simulation data of thermal management of an aged battery using a battery management model and an energy management model, thereby coupling multiple physical fields after correction, to achieve an accurate simulation that is closest to the actual situation, improve the simulation effect, and improve the battery charge and discharge strategy while improving the safety of the aged battery.

The invention belongs to the technical field of coal mine shaft maintenance emergency communication, and particularly discloses a shaft maintenance communication device and method based on an electromagnetic coupling principle. The device comprises an elevator controller, a car room main controller, a signal transmission medium and two pairs of electromagnetic coupling coils. The elevator controller is arranged in an elevator cage, and the car room main controller is arranged in a ground winch control room; a pair of electromagnetic coupling coils is respectively arranged at the top of a skip bucket of the elevator and below a guide wheel through a lasso structure and is respectively used for sending and receiving signals. A closed-loop lifting link where a steel wire rope of the elevator is located is used as a signal transmission medium, and bidirectional long-distance transmission of signals is achieved between an elevator controller and a car room main controller based on the electromagnetic coupling communication principle. A maintainer can actively lock the hoister through the hoister controller, accidental starting of the hoister caused by misoperation of a winch control room is avoided, and after locking is released, a winch driver can be informed of starting and stopping the hoister through voice and dotting control signals.

The invention discloses a low-voltage switch cabinet intelligent monitoring system and method based on the Internet of Things, particularly relates to the technical field of power equipment state monitoring, and is used for solving the problem of monitoring data distortion caused by accumulated damage of a sensor due to arc electromagnetic pulses in the prior art. A current and voltage waveform is collected and an arc event is identified; calculating an electromagnetic coupling weight coefficient according to the arc position and the sensor coordinate; capturing working parameters of the sensor, comparing the working parameters with historical reference values, and calculating offset of key parameters; information entropy mutation of the offset of the same type of sensor groups is analyzed, and a nonlinear damage mark is triggered; based on the offset and the damage mark, establishing a segmentation mapping relation and outputting an accumulated damage evaluation value; correcting monitoring data according to the evaluation value and inputting the monitoring data into a fault diagnosis model to execute early warning; quantitative evaluation and data self-correction of the hidden damage of the sensor are realized, and the accuracy of fault early warning is guaranteed from the source.

The invention discloses a transformer monitoring method and system based on a multi-dimensional signal, and relates to the technical field of transformer monitoring, and the method comprises the steps: obtaining the multi-dimensional signal and working condition parameters of a transformer, carrying out the time domain feature extraction of the multi-dimensional signal, obtaining a corresponding time domain correlation feature, carrying out the frequency domain feature extraction of the multi-dimensional signal, obtaining a corresponding frequency domain correlation feature, and carrying out the time domain feature extraction of the multi-dimensional signal; fault analysis is carried out according to the working condition parameters and the frequency domain correlation characteristics, and a corresponding initial fault detection result and an electromagnetic coupling residual value are obtained; and if so, carrying out fuzzy evaluation on the time domain correlation feature, the frequency domain correlation feature, the electromagnetic coupling residual value and the multi-dimensional signal based on a pre-trained fault detection model to obtain a corresponding fault monitoring result. The technical problems that a traditional transformer monitoring method mainly depends on electrical signal analysis, but key parameters such as oil temperature are not included in a monitoring system, so that potential fault hidden dangers cannot be found in time, and the operation reliability of the transformer is reduced are solved.

The invention relates to the technical field of circuits, and discloses an electro-optical signal conversion method and equipment. The equipment comprises an input module which is connected with at least two paths of signal output interfaces of tested equipment and is used for transmitting at least two paths of signals of the tested equipment to a signal processing module; the signal processing module is used for combining and encoding the at least two paths of signals to generate an electric signal, and transmitting the electric signal to the electro-optical conversion module; the electro-optical conversion module is used for converting the electric signal into an optical signal; and the main control chip is used for controlling the working mode of at least one of the input module, the signal processing module, the main control chip and the electro-optical conversion module according to the current signal transmission state. The electric signal is converted into the optical signal, so that the influence of electromagnetic coupling is avoided.

A power transmission tower grounding resistance non-contact measurement method based on the electromagnetic coupling principle comprises the following steps that transmitting and receiving electromagnetic coupling coils are arranged around an iron tower grounding body, and geometric calibration and spatial positioning of a measurement area are completed by combining grounding grid structure parameters and soil conduction characteristics; injecting a high-frequency alternating-current excitation signal into the transmitting coil, and synchronously acquiring the amplitude and phase response of the induced voltage at a receiving coil end; carrying out filtering processing on the induction signal by adopting a time-frequency analysis and phase decoupling algorithm, and solving a function relationship between electromagnetic response and grounding impedance by combining a coupling equivalent model; based on experimental calibration data and scene parameters, a nonlinear mapping model of induction response and grounding resistance is constructed, and real-time inversion calculation is carried out by combining a solving result obtained in the third step. According to the invention, the real-time accurate measurement of the grounding resistance under the conditions of no power failure and no wire breakage is realized, and the safety, the operation convenience and the anti-interference capability in a complex environment in the measurement process are obviously improved.

The invention discloses an amorphous wire stress-electromagnetic coupling effect modeling method based on a micro-magnetism theory, and belongs to the technical field of magnetic materials and electromagnetic property regulation and control. According to the method, an amorphous wire micro-magnetic three-dimensional simulation model is constructed, solving is conducted through a finite element method, cross-scale simulation of magnetic domain structure evolution of the amorphous wire under the action of external stress is achieved, the change of effective magnetic conductivity of the amorphous wire under the action of different stress fields is further calculated, the skin effect and the magneto-impedance theory are fused, and the magnetic conductivity of the amorphous wire is calculated. And establishing an amorphous wire electromagnetic impedance spectrum model. According to the method, a quantitative mapping relation among the effective magnetic conductivity, the electromagnetic impedance characteristic and the external stress is established, a magnetic domain structure under the action of different stress fields can be deduced, and key parameters such as the effective magnetic conductivity and the electromagnetic impedance spectrum are output; theoretical guidance is provided for wide application of the amorphous wire in the fields of high-sensitivity stress sensing device design, broadband adjustable electromagnetic wave absorption / shielding, self-sensing composite material structure health monitoring and the like.

The invention discloses an electromagnet electromagnetic ultrasonic thickness measurement method and system based on an anti-collision unmanned aerial vehicle, and relates to the field of nondestructive testing, and the method comprises the steps: obtaining the coordinates of a preset detection point, controlling the flight path of the unmanned aerial vehicle, and determining the safety position information of the unmanned aerial vehicle located near the preset detection point; the motion of the multi-degree-of-freedom mechanical arm is controlled through a servo motor and an encoder, contact impact is reduced through a buffer mechanism, and attitude information of the electromagnetic ultrasonic sensor unit aligned with the surface of the to-be-detected object is determined; the magnetic attraction force is adjusted in real time through a closed-loop feedback system, and a linear frequency modulation pulse is adopted as an excitation signal to obtain an echo signal containing acoustic-electromagnetic coupling interference; acoustic-electromagnetic coupling interference is corrected and processed in an auxiliary mode through a multi-mode signal separation algorithm and machine learning, and final thickness data is obtained; and transmitting the final thickness data to a cloud platform, and providing a data visualization interface and an alarm function on the cloud platform. According to the invention, accurate thickness detection and remote monitoring of a complex structure material can be realized.

The invention provides an active circuit electromagnetic response characteristic modeling analysis method and related equipment, and relates to the technical field of integrated circuits. According to the method, the to-be-analyzed active circuit is divided into the circuit component units mainly relating to nonlinear characteristic changes and the circuit carrier plate mainly relating to linear characteristics and only comprising unit connection wiring, and based on circuit component S parameter actual measurement operation in any strong field environment, complex nonlinear modeling errors are avoided, and the system reliability is improved. Meanwhile, on the basis of wiring S parameter simulation operation in a corresponding strong field environment, the high-frequency electromagnetic coupling effect of circuit connection wiring is accurately captured, the circuit modeling calculation amount is reduced, and then through cascading fusion analysis operation on wiring simulation S parameters and assembly actual measurement S parameters, the wiring simulation S parameters and the assembly actual measurement S parameters are analyzed; the rapid collaborative analysis of the wiring electromagnetic coupling response and the component nonlinear behavior is realized, so that the real electromagnetic response characteristic condition of the specified active circuit in the corresponding strong field environment can be rapidly and accurately reproduced, and the rapid iterative optimization effect of the active circuit design can be conveniently realized.

The invention relates to the technical field of phased-array antennas, in particular to a broadband phased-array antenna unit convenient to feed, which comprises an antenna unit, the output end of the antenna unit is electrically connected with a radiation patch, the bottom of the radiation patch is electrically connected with a grounding plate, the grounding plate is provided with a gap, and the gap is communicated with the antenna unit. The center of the antenna unit is provided with a center feed structure. According to the invention, by adopting a cross-shaped symmetrically distributed four-slot coupling feed mechanism and combining with a center combiner structure, the working bandwidth is expanded, the circular polarization characteristic is optimized, and meanwhile, the complexity of a feed network is remarkably simplified, the electromagnetic coupling design of the radiation patch and the double-layer grounding plate is matched with a surface slotting structure, so that the antenna efficiency is improved. According to the phased array system, the current distribution and the radiation efficiency are effectively improved, the feed regularity of the phased array system is ensured by the arrangement mode of rotary arrangement, and the radio frequency feed network adopts a multi-layer microstrip line and digital phase shift technology and supports low-loss and high-consistency signal distribution and phase control.

The invention relates to the technical field of thermoelectric magnetic field numerical simulation, in particular to a numerical simulation method for liquid metal flow heat transfer under thermal electromagnetic multi-field coupling. The method comprises the following steps: acquiring metal structure physical parameters and thermal electromagnetic multi-field coupling simulation control parameters of metal to be tested; based on the metal structure physical parameters and the thermal electromagnetic multi-field coupling simulation control parameters, liquid metal thermal electromagnetic multi-field reaction numerical simulation and verification are carried out, and liquid metal thermal electromagnetic multi-field reaction verification data are generated; setting single-factor working condition simulation control parameters; and carrying out working condition simulation liquid metal flow heat transfer global characteristic analysis on the liquid metal thermoelectromagnetic multi-field reaction verification data based on the single-factor working condition simulation control parameters so as to establish a liquid metal thermoelectromagnetic flow heat transfer global characteristic model. According to the invention, comprehensive and accurate analysis of flowing and heat transfer of the liquid metal in the closed cavity under the thermal electromagnetic coupling effect by various factors is realized.

The invention discloses an underwater wireless energy transmission system parameter estimation method based on a graph attention network and a progressive enhancement mechanism, a program, equipment and a storage medium. According to the method, a physical attention graph neural network is constructed, the circuit topology of the underwater wireless energy transmission system is mapped into a graph structure, nodes represent circuit components, edges represent an electromagnetic coupling relation, and physical constraints such as the Kirchhoff's law and energy conservation are embedded. In combination with a pre-training strategy and an adaptive weight loss function, model parameters are initialized through simulation data and gradually migrated to real data training, and high-precision estimation under the dynamic parameter condition is realized. The problems that a traditional physical model is complex in calculation, a data driving method is poor in generalization and physically cannot be explained are solved, the accuracy and robustness of voltage, current and efficiency parameter estimation of the wireless energy transmission system in the underwater complex environment are improved, the result shows that MAE is reduced to 0.2389, R2 reaches 0.9987, and compared with the prior art, the MAE is improved by 40% or above.

The multi-directional controllable suspension system comprises a linear electromagnetic vibration reduction assembly and an arc-surface electromagnetic vibration reduction assembly, when the multi-directional controllable suspension system is used, when a vehicle frame at the lower end vibrates vertically, a first guide rod moves in the axial direction of an outer cylinder, and a cylindrical electromagnetic coupling unit fixed to the first guide rod moves between an outer permanent magnet array and an inner permanent magnet array; when the vehicle body inclines laterally or twists, the outer cylinder rotates around the hinged point of the outer cylinder and the lower end vehicle frame, the cambered surface electromagnetic coupling unit is driven to deflect between the upper permanent magnet array and the lower permanent magnet array, the gradient magnetic field is cut to generate resistance moment, and vibration is reduced. The first elastic piece and the second elastic piece provide elastic restoring force for the upper permanent magnet array and the lower permanent magnet array correspondingly to cooperatively inhibit side inclination and torsion, so that multi-dimensional vibration reduction in the horizontal direction is achieved, and the dynamic stability of the vehicle is improved.

The invention relates to a medium wave transmitter fault prediction and adaptive operation and maintenance method based on artificial intelligence, and the method comprises the steps: constructing an electromagnetic coupling topological graph through analyzing a circuit board design file, and quantifying a fault propagation path between power amplifier modules; fault current signals are collected in real time, and risk quantitative indexes are generated in combination with topological characteristics; modeling and predicting a cascading risk probability based on the graph structure; dynamically adjusting a radio frequency power path and a carrier frequency according to a topological position evaluation result; and utilizing an execution feedback closed loop to optimize the prediction model. The method solves the problems that a traditional scheme cannot quantify an electromagnetic coupling propagation path, prediction and hardware control are separated, and a dynamic optimization mechanism is lacked, achieves accurate blocking of a fault propagation path and adaptive evolution of a prediction model, and remarkably improves the operation stability and fault response efficiency of a medium-wave transmitter.