746 results about "Field strength" patented technology

The invention discloses an experimental calibration method based on multi-sensor signal fusion processing, particularly relates to the field of data analysis, and comprises the steps of a stepped confrontation disturbance protocol, data stream processing and real-time analysis, and multi-stage logic judgment and calibration execution. A stepped confrontation disturbance protocol is created for the first time, potential errors of the sensor are excited in real time and corrected in a closed loop mode under the condition that system operation is not interrupted, and a traditional shutdown calibration mode is thoroughly replaced; a multi-stage disturbance defense system is constructed, and composite interferences such as spectrum aliasing, overload distortion and signal-to-noise ratio attenuation caused by electromechanical thermal multi-physical field strong coupling are effectively suppressed; laser space calibration and dynamic rigidity modulation technologies are fused, and space drift errors caused by deformation of the mounting base and mechanical loosening are accurately diagnosed and compensated. Finally, long-term precision stability and data fusion reliability of the multi-source sensor under complex working conditions are achieved.

The invention discloses a power distribution network line fault positioning detection system, and relates to the technical field of power distribution network fault detection. The system comprises a mixed information acquisition layer, a fault feature extraction layer, an intelligent diagnosis layer and a fault positioning layer. The mixed signal acquisition layer comprises a high-frequency transient wave recording unit, a power frequency measurement unit, a wireless pulse sensor and a distributed optical fiber temperature measurement unit; the fault feature extraction layer comprises a time-frequency analysis module, a preprocessing module and a three-dimensional feature vector module; the intelligent diagnosis layer comprises a convolutional attention network, a space-time diagram neural network and a transfer learning module; the fault positioning layer comprises a particle swarm module and a fuzzy reasoning module. According to the invention, data information of the cable is acquired through the mixed information acquisition layer, a video analysis window function is dynamically matched with signal characteristics, a time domain graph scale, a frequency domain resonance component and a space field intensity gradient are constructed, fault diagnosis and positioning are carried out by using the intelligent diagnosis layer, and the fault positioning detection efficiency of the power distribution network is improved.

The invention discloses a response time conduction type testing device and method for a radio frequency channel protection device. The response time conduction type testing device comprises a transient field intensity generating device, an isolator, a directional coupler, a first attenuator, a second attenuator, a third attenuator, a first power meter, a second power meter, a high-speed oscilloscope, a vector network analyzer and a radio frequency channel protection device to be tested. According to the method, the response performance of the protection device under the influence of the transient strong field can be comprehensively, safely and accurately evaluated, the amplitude limiting function of the protection device can still be effectively exerted under the action of the transient strong field with an extremely narrow rising edge, and then subsequent devices, circuits and equipment are prevented from being damaged.

The invention relates to the technical field of electromagnetic environment effect, and discloses a high-intensity radiation field complete machine low-level scanning field extrapolation verification system and verification method, and the verification method comprises the following steps: building a complete machine HIRF high-level scanning field test system under the same test site requirement of a complete machine HIRF-LLSF test, the whole machine HIRF high-level scanning field test system adopts an HPM system to simulate a narrow-band high-level HIRF radiation source, the distance between a transmitting antenna and a test object is kept to be the same as that of a whole machine HIRF-LLSF test, and the placing position of a receiving antenna or a field intensity probe is the same as that of the whole machine HIRF-LLSF test; according to the invention, the technical problems of calibration of the HIRF high-level scanning field of the whole machine and accurate and synchronous measurement of the cabin coupling field and the problem of to-be-verified extrapolation accuracy of the test result of the HIRF-LLSF test of the whole machine can be solved, and a test means is provided for protection design and safety evaluation of the HIRF of the airplane.

The embodiment of the invention discloses a vehicle key control method and device, a vehicle key and a storage medium. The method comprises the following steps: acquiring Bluetooth signal field intensity information between a key terminal and a vehicle terminal, and determining a position relation of the key terminal relative to the vehicle terminal based on the Bluetooth signal field intensity information; if the position relationship represents that the key terminal is located outside the vehicle welcome area, controlling the ultra wide band module to be in a dormant state; the Bluetooth signal receiving strength between the key terminal and the vehicle end anchor point is obtained, and if the Bluetooth signal receiving strength is larger than a preset Bluetooth signal receiving strength threshold value, an ultra-wideband communication module is controlled to be started so as to establish an ultra-wideband communication session between the key terminal and the vehicle end anchor point; a distance value between the key terminal and the vehicle terminal is determined based on the ultra-wideband communication session, and an operating parameter of the ultra-wideband communication module is adjusted based on the distance value. According to the embodiment of the invention, the problem of high power consumption caused by starting the ultra-wideband communication module for a long time can be avoided, and the communication mode and parameters are flexibly adjusted, so that the communication between the vehicle and the key is more intelligent and personalized.

The invention provides a large-area split type flexible magnetic tactile sensor with a sensing function, and the sensor employs a plurality of flexible square magnetic sheets which are magnetized in the thickness direction, and the polarities of the flexible square magnetic sheets are alternately arranged in a checkerboard array mode in which the polarities of the magnetic fields of the adjacent flexible square magnetic sheets are opposite, so as to simulate a flexible magnetic film which is magnetized in a folded manner. The magnetic flux density of a contact force acquisition area is enhanced, a U-net algorithm is adopted to carry out field intensity-force relation fitting on the divided acquisition area, and a contact force cloud picture is generated, so that a Hall sensor and a flexible magnetic film can keep a large distance to carry out split type large-area contact force sensing, and lossless split type installation is realized; and compared with simple magnetic field modes such as unidirectional magnetization, the touch sensor has higher sensitivity. According to the size of a required contact force measuring surface, more flexible magnetic touch sensor arrays are arranged, a contact force cloud picture is drawn together through a plurality of units, and the flexible magnetic touch sensor array has application potential in the fields of bionic robots, flexible electronics, medical treatment and the like.

The invention relates to the technical field of connector detection, and discloses a reliability detection method based on a connector. The method comprises the following steps: acquiring real-time monitoring data of a multi-channel electrical sensor of a connector in a power-on state, wherein the real-time monitoring data covers a contact impedance fluctuation sequence, temperature rise gradient distribution and an electromagnetic leakage intensity spectrum; performing time-frequency domain fusion processing on the monitoring data, and extracting dynamic characteristic parameter sets such as impedance attenuation rate, heat conduction lag coefficient and field intensity distortion factor of each contact point; then, according to the parameter space distribution difference, a three-dimensional degradation model comprising a material performance attenuation layer, a contact surface deformation topology layer and an insulating medium loss layer is constructed; coupling mechanical stress and electric heating field intensity distribution based on the model, and generating life prediction indexes of each region; and finally, completing reliability grading according to the indexes, and outputting a detection report with key failure position marks. According to the method, comprehensive and accurate evaluation of the reliability of the connector is realized, and an effective technical path is provided for quality control of the connector.

The embodiment of the invention discloses a high-speed railway trackside space electromagnetic environment recording and simulating method and device. A high-speed railway system comprises a field acquisition test subsystem and a signal reconstruction test subsystem. Comprising the following steps: collecting field electromagnetic field intensity data externally generated by an electromagnetic interference source of the high-speed railway system through the field collecting and testing subsystem; obtaining related design parameters of the high-speed railway system and external area parameters of the simulation position; reconstructing the field electromagnetic field intensity data, the design parameters and the external area parameters through the signal reconstruction test subsystem to obtain a field electromagnetic interference field intensity signal; and inputting the field electromagnetic interference field intensity signal to the electromagnetic sensitive equipment to enable the electromagnetic sensitive equipment to perform operation simulation so as to obtain whether the electromagnetic sensitive equipment operates normally based on the field electromagnetic interference field intensity signal.

The invention relates to the field of electric field quantum measurement, in particular to a low-frequency electric field measurement method and a three-photon Rydberg system. The low-frequency electric field measurement method comprises the following steps: moving an atom gas chamber containing cesium atoms to a low-frequency electric field to be measured; cesium atoms are driven by probe light to transition from a ground state 6S1 / 2 to an excited state 6P1 / 2; driving cesium atoms to jump from an excited state 6P1 / 2 to an excited state 9S1 / 2 through decoration light; driving the cesium atoms to transition from an excited state 9S1 / 2 to a higher Rydberg state nP3 / 2 through coupled light to obtain Rydberg atoms; a photoelectric detector is adopted to detect the absorption condition of the detection light; based on the absorption condition, an oscilloscope is adopted to observe EIT spectrum change; based on the EIT spectrum change, obtaining a spectrum frequency shift amount; and the electric field intensity of the low-frequency electric field to be measured is calculated through the spectral frequency shift amount and the polarizability of the Rydberg atoms, so that the shielding problem of the atomic air chamber to the low-frequency electric field can be reduced, the spectral line width is narrower, and the electric field measurement resolution is greatly improved.

The invention discloses a multi-objective optimization base station layout method, which comprises the following steps: firstly, determining a base station layout area boundary, and determining a system coverage area boundary; then determining a precision factor function and a signal field intensity function used in the optimization process; setting initial parameters of a multi-objective optimization algorithm; the precision factor calculation equation and the signal field intensity calculation equation are used as fitness functions of a multi-objective optimization algorithm for iterative circulation; and obtaining a final Pareto frontier solution set, and selecting a layout scheme from the Pareto solution set according to an actual terrain environment to arrange the navigation base station, so that the layout of the base station is completed. According to the method, the system signal coverage range is introduced, so that the coverage range of the land-based navigation system can be expanded while the precision factor distribution is optimized.

The frequency hopping communication signal receiving method comprises the following steps: performing parameter configuration; performing energy detection on the radio frequency signal, and when the detected energy is greater than the upper threshold of the threshold comparator, enabling the received signal to pass through an overload protection attenuator; when the detected energy is smaller than the lower limit threshold of the threshold comparator, the received signal bypasses the overload protection attenuator; after the receiving frequency is switched, the average power of channel receiving signals in the time period T3 is calculated according to the set sampling point count value N1 in the time period T3, and the channel receiving field intensity is calculated according to the average power; respectively comparing the receiving field intensity with an upper limit threshold value and a lower limit threshold value, and correspondingly adjusting an attenuation value of a variable attenuator and an amplification coefficient of a variable gain amplifier according to a comparison result; and calculating the amplitude value of the maximum sample point in all the received sample points according to the set sample point count value N2 in the T4, calculating a digital gain adjustment value, then looking up a table to read a multiplication coefficient, adjusting the digital signal gain, and outputting stable IQ data.

The invention provides a keyless entry system calibration method and apparatus, an electronic device and a medium. The method comprises the steps of determining a first region and a second region according to a to-be-calibrated function of a target antenna, a first field intensity threshold and a second field intensity threshold; the first field intensity threshold value is greater than the second field intensity threshold value; the second area comprises the first area; based on the position of the key in the expansion area, determining a first field intensity measurement value and a second field intensity measurement value corresponding to the position; the first field intensity measurement value is the field intensity measurement value of the key relative to the target antenna, and the second field intensity measurement value is the field intensity measurement value of the key relative to at least one other antenna on the vehicle; the expansion area is an area which is in the second area and is not in the first area; determining a judgment rule set according to the to-be-calibrated function; and determining a target field intensity threshold value corresponding to the to-be-calibrated function according to the judgment rule set, the first field intensity measurement value and the second field intensity measurement value.

A wireless communication system, when a first mode is set, searches for a base station to be newly connected when a received radio field strength value falls below a first threshold, and changes the base station to be connected from a first base station to a second base station when information on the second base station, the information being received at a received radio field strength equal to or larger than a second threshold that is larger than a first threshold, is received from another wireless communication device, and when a second mode is set, searches for the base station to be newly connected when the received radio field strength value falls below a third threshold that is equal to or larger than the second threshold, and adopts the searched base station as the second base station and transmits information on the second base station.

The present invention discloses a low-frequency large-span electromagnetic wave CT data correction method, which comprises the following steps: Step 1, obtaining the initial emission field strength, the ground surface absorption coefficient and the absorption coefficient in the borehole: using the initial emission field strength obtained in Step 1, the distance from the emission antenna in the borehole to the hole mouth, and the distance from the receiving antenna in the borehole to the hole mouth, to obtain the field strength propagating along the borehole and the field strength propagating along the borehole, and the field strength of the corrected low-frequency electromagnetic wave propagating in a straight line at the shortest distance in the medium. The correction method disclosed by the present invention solves the problem of poor inversion effect of the measured data of the low-frequency cross-hole electromagnetic wave CT, realizes the application of the low-frequency cross-hole electromagnetic wave CT technology in a large hole distance of 20-40 m, improves the detection efficiency and reduces the detection cost.

Described herein are systems and techniques for improving accuracies of determinations made using a nuclear magnetic resonance (NMR) sensing device when the NRM sensing device collects data in a wellbore. NMR sensing devices include a magnet that provides a magnetic field that aligns the spins of protons in substances near the NMR sensing device. The magnetic field strength provided by this magnet affects the sensitivity of the NMR sensing device and affects frequencies that the NMR sensing device effectively uses when the NMR sensing device operates. Furthermore, the field strength of magnets used in an NMR sensing device varies with temperature. Since temperatures within a wellbore vary significantly and since these temperatures affect how an NMR sensing device operates, systems and techniques of the present disclosure collect calibration data in a calibration chamber such that data sensed by the NMR sensing device can be interpreted more accurately when temperatures change.

The invention provides a ship electromagnetic environment prediction method and device based on an empirical model, equipment and a medium, and the method comprises the steps: firstly, carrying out the translation of a space field point in a global rectangular coordinate system according to the geometric position of an original point, and constructing a local rectangular coordinate system; then, based on the local rectangular coordinate system, antenna attitude conversion is carried out on the space field points, and array polar coordinates are generated; then, according to the polar coordinates of the array, a discrimination field domain is constructed by discriminating the relative distance between the space field point and the array antenna; and finally, based on the discrimination field domain, performing gain on a preset field point through a three-dimensional gain graph, and performing field intensity calculation on the preset field point to complete prediction of the electromagnetic environment of the preset field point. According to the embodiment of the invention, the prediction of the electromagnetic environment is realized, the calculation efficiency and precision are improved, and the engineering practice requirements are met.

The invention provides a plasma degumming machine and an ignition method. The plasma degumming machine comprises a Faraday cylinder, a quartz cylinder, an inductance coil and an ignition device, and the top wall of the Faraday cylinder is grounded; the quartz cylinder is arranged in the Faraday cylinder and forms a plasma cavity; the inductance coil is wound on the periphery of the Faraday cup and is used for receiving a high-voltage high-frequency signal; the ignition device is connected to the inductance coil and forms equivalent capacitance with the inductance coil and / or the Faraday cup; wherein the equivalent capacitor is used for coupling high frequency and high voltage from the inductance coil, high field intensity used for ionizing gas is formed in the plasma cavity based on discharge of the equivalent capacitor, and the ignition device conducts the top wall and / or the side wall of the Faraday cup along with increase of the density of plasma obtained by continuous ionization of the gas in the plasma cavity. The plasma degumming machine provided by the invention can realize rapid ignition, and the ignition device can be automatically grounded after ignition. The invention further provides an ignition method based on the plasma degumming machine.

Provided are an atomic beam magnetic resonance method and system based on combined separated oscillatory fields. The method includes: generating, by an atomic beam source, two identical atomic beams; performing atomic state purification treatment on the two identical atomic beams to generate two identical state-purified atomic beams; exciting, by zero-phase-difference SOFs, one identical state-purified atomic beam to perform atomic beam magnetic resonance to obtain a first atomic beam magnetic resonance signal; and exciting, by π-phase-difference SOFs, the other identical state-purified atomic beam to perform atomic beam magnetic resonance to thereby obtain a second atomic beam magnetic resonance signal, the zero-phase-difference SOFs and the π-phase-difference SOFs have the same interaction length, the same drift length, and the same oscillatory field strength; and performing subtraction operation on the first atomic beam magnetic resonance signal and the second atomic beam magnetic resonance signal to thereby generate a combined Ramsey magnetic resonance signal.

The invention discloses a method for calculating a radio propagation simulation model in a complex environment based on correction factors. The system comprises a correction factor calculation module, a complex environment simulation calculation module, a simulation correction module and a simulation data output module. The correction factor calculation module determines a correction factor according to the difference value between the actual measurement value and the simulation value of the corresponding point; the complex environment simulation calculation module performs simulation calculation on each longitude and latitude point according to an existing simulation algorithm; the simulation correction module corrects the simulation value and the correction factor; and the simulation data output module outputs the simulation data according to the matrix. The method has the beneficial effects that the wireless field intensity simulation prediction precision in a complex urban environment is improved, the prediction error of the corrected model in a high-rise building dense area is remarkably reduced, the accuracy of base station layout and signal coverage is effectively improved, and the method can be widely applied to planning and optimization of a wireless communication network and has a wide application prospect. And powerful technical support is provided for improving communication quality.

The invention discloses a vehicle high-frequency electromagnetic radiation measurement method, device, equipment, medium and product, and relates to the technical field of vehicle test.The method comprises the steps that field uniformity verification is conducted on a whole vehicle electromagnetic reverberation chamber, it is determined that the field uniformity in a target frequency band meets the requirement, a tested vehicle needs to be parked in the whole vehicle electromagnetic reverberation chamber, and the tested vehicle needs to be parked in the target frequency band; all electric equipment which is not necessary for testing is closed by the vehicle; measuring the insertion loss of the whole vehicle electromagnetic reverberation chamber by using a vector network analyzer; performing a radiation emission test on the vehicle in the target frequency band, and receiving and recording test data by using an EMI receiver; and calculating the radiation emission power and the radiation field intensity of the vehicle based on the test data and the insertion loss.

The utility model discloses a crane equipment near-electricity alarm based on field intensity detection in the technical field of near-electricity alarms, which comprises a crane, a signal receiving component is mounted at one end of a crane body of the crane, an induction transmitting module is arranged at one end of a suspension arm of the crane, and the signal receiving component comprises a signal receiving module. The signal receiving module is in electric signal connection with the induction transmitting module, a supporting base is installed at the bottom of the signal receiving module, the safety protection design in the signal receiving module effectively reduces pollution and damage of the external environment to key parts of the equipment, long-term stable operation of the equipment is guaranteed, and the dust removing piece arranged in the protection part can effectively remove dust in the equipment. According to the near-electricity alarm designed in the scheme, impurities accumulated on the explosion-proof glass can be regularly cleaned through cooperation with the guide sliding groove, the clear display effect is ensured, sight blocking caused by dust accumulation is reduced, the safety and reliability in the operation process are improved, and potential safety hazards can be effectively reduced in an electric power construction site.

The invention discloses a phased-array antenna electrical performance calculation method and system considering array element poses, and the method comprises the steps: building a phased-array antenna electromechanical multi-source uncertainty factor coupling model according to the array element pose uncertainty influence factors and excitation current uncertainty influence factors of a phased-array antenna; solving and calculating to obtain a phased-array antenna field intensity directional diagram uncertainty expression under interval representation; and determining a power pattern of the phased-array antenna based on the uncertainty expression of the field intensity pattern of the phased-array antenna under the interval representation, and calculating the electrical performance of the phased-array antenna to obtain an electrical performance calculation result of the phased-array antenna. According to the method, the influence of uncertain factors on the electrical performance of the phased-array antenna can be quickly and accurately analyzed, so that the calculation efficiency of the electrical performance of the phased-array antenna and the accuracy of a calculation result are improved. The phased-array antenna electrical performance calculation method and system considering the array element poses can be widely applied to the technical field of radar antennas.

A system and method for measuring and mapping electromagnetic field strength using an unmanned aerial vehicle (UAV) equipped with a field strength indicator. The UAV records signal power levels while tracking its position via GPS, transmitting data in real-time to a ground station. The ground station software generates detailed maps and charts visualizing antenna signal propagation. Users can customize measurement parameters to achieve desired resolution and granularity. The system and method provide an efficient and automated method for assessing antenna performance across various azimuths and elevations.

The invention discloses a ship electromagnetic environment prediction method based on a deep forest model, and relates to the technical field of electromagnetic compatibility and antennae, and the method comprises the steps: converting the coordinates of each point of given data (simulation data) into a global rectangular coordinate relative to a main ship body, and obtaining an array rectangular coordinate of each point relative to an array plane; converting the array rectangular coordinates of the points relative to the array plane into relative array spherical coordinates of the points when the antenna attitudes are different; the original global rectangular coordinates, the relative array spherical coordinates, the azimuth angle and the pitch angle of each electromagnetic environment simulation point and the logarithmic transformation values of the field intensity values corresponding to the points are constructed into a feature combination of electromagnetic environment prediction; constructing a deep forest model, and training and obtaining optimal hyper-parameters of the model by using electromagnetic environment simulation data; performing coordinate conversion and feature combination on the coordinates of the spatial points to be predicted; obtaining a model prediction value; and obtaining a field intensity value under the original scale. By means of the method, prediction of the electromagnetic environment under a certain simulation working condition can be completed within a very short time.

The invention relates to a basin-type insulator noise reproduction method and system, computer equipment, a computer readable storage medium and a computer program product. The method is applied to a basin-type insulator noise reproduction system. The basin-type insulator noise reproduction system comprises a basin-type insulator, an M-element antenna array and a data acquisition system. The method comprises the following steps: acquiring target noise data of the basin-type insulator based on a data acquisition system; obtaining an expected radiation waveform and expected field intensity distribution of the M-element antenna array based on the basin-type insulator target noise; according to the expected radiation waveform and the expected field intensity distribution of the M-element antenna array, calling a phase regulation and control model to generate an excitation signal; and adopting the excitation signal to drive the M-element antenna array, and synthesizing a basin-type insulator to reproduce noise. By adopting the method, the noise reproduction of the basin-type insulator can be realized.

The invention belongs to the technical field of non-contact card reading performance, and discloses a debugging method for improving non-contact card reading performance, which comprises the following specific steps of: designing an antenna: according to the design of the shape of the antenna, the parameters of the antenna are related to the size of a coil, the number of turns, the width of the coil, the distance between the coils and the thickness of a PCB (Printed Circuit Board); inputting the size of the antenna, and adjusting the turn number N of the coil to obtain an inductance value; by optimizing antenna design, component parameter selection and matching circuit design, the application range of the system is widened, the stability and accuracy of card reading signals are improved, and the probability of misreading and misreading is reduced; by adjusting the external impedance, the EMC filter circuit and the like, the accurate control on the card reading field intensity is realized, and the consistency and reliability of card reading are improved; by adjusting the gain of the receiver and starting noise suppression measures such as AGC and Squelch functions, the noise level of the system is effectively reduced, and the card reading performance is further improved; a magnetic conductive protection measure is provided for the influence of a metal environment on the performance of the antenna.

The invention relates to the technical field of electromagnetic simulation, in particular to a W-band antenna pointing angle simulation analysis method, which comprises the following steps: acquiring the size of a W-band antenna and the form of a radiation unit, extracting main lobe curvature and feed matching characteristics, identifying a main lobe edge interference path, and adjusting a reflection phase to form a dynamic reflectivity boundary. Dividing tetrahedron and hexahedron grids to evaluate polarization consistency, optimizing a field intensity relationship between a main lobe and a side lobe, screening an angle interval, and obtaining a directional angle correction parameter. According to the invention, the specific size and form of the antenna are acquired, the curvature distribution of the main lobe coverage area and the matching relation with the feed structure are deeply analyzed, and the reflection intensity difference between the main lobe path and the side lobe path is monitored, so that the pointing precision and the coverage efficiency of the antenna are effectively improved; according to the antenna design, the performance is ensured, the specific area can be optimized, and the predictability and the stability of the antenna performance are remarkably improved.

The invention discloses a transformer substation transient electric field sensor calibration method and system, and relates to the technical field of transformer substations, and the method comprises the steps: placing an electric field sensor in a transverse electromagnetic wave cell, and placing a field intensity probe at the upper half part of the cell to measure the electric field intensity. The first feed-in power is recorded by changing the excitation source injection cell. Then, the field intensity probe is taken out, and the electric field sensor is put back to the original position for steady-state calibration. Constructing a transient calibration test loop, generating a high-voltage pulse signal, thereby generating a transient electric field environment, and carrying out transient calibration on the electric field sensor; according to the invention, high-precision steady-state and transient-state calibration of the sensor is realized, and the measurement accuracy and reliability are obviously improved; the calibration process is simplified, the operation convenience is improved, and the compatibility of the sensor in a complex electromagnetic environment is enhanced; accurate calibration is beneficial for finding potential problems, prolonging the service life of the sensor and reducing the maintenance cost, so that the safety and the stability of a power system are integrally improved.

The invention discloses a signal enhancement method and device in an industrial plant area, and relates to the field of wireless communication, and the method comprises the steps: firstly, obtaining complete channel state information, and guaranteeing that all decisions are based on real channel characteristics instead of theoretical assumptions; and secondly, if the complete channel state information does not meet the target QoS demand quantization parameter, maximizing a receiving signal to interference plus noise ratio and meeting the target QoS demand are taken as optimization targets, an optimization result is obtained based on channel field intensity distribution information of a preset digital twin model, and finally, the optimization result is controlled and executed to form closed-loop feedback. According to the method, optimization is carried out based on channel field intensity distribution information of a unit space in a digital twin model, and a complex problem needing to be solved by a high-dimensional iterative solution algorithm in related technologies is converted into table lookup and interpolation operation based on space coordinates, so that the calculation complexity is remarkably reduced, the time for obtaining an optimization result is greatly shortened, and the calculation efficiency is improved. Therefore, the time when the terminal is in a poor-quality signal state is greatly reduced.

The present disclosure provides systems and methods for removing electromagnetic interference from low-field magnetic resonance images. In one aspect, a method can include projecting a low-field strength magnetic field toward an object of interest located within a field of view and transmitting a radio frequency pulse sequence to a radio frequency coil assembly configured to selectively excite magnetization in the object of interest within the field of view. The method can further include receiving an output signal from the radio frequency coil assembly during a signal acquisition period and receiving a sample signal from the radio frequency coil assembly during an interference period. The method can further include comparing the output signal and the sample signal to identify an interference component and adjusting the output signal based on the interference component.