364 results about "Electromagnetic emission" patented technology

A computer implemented method that enables detection and mitigation of drilling hazards is described. The method includes determining time-domain electromagnetic parameters and obtaining data at multiple heights by at least one unmanned aerial vehicle equipped with at least one receiver as a time-domain electromagnetic transmitter emits electromagnetic radiation based on the time-domain electromagnetic parameters. The method also includes fusing the obtained data to generate a subsurface model.

The invention belongs to the technical field of unmanned aerial vehicle full-aviation electromagnetic detection, and particularly relates to a full-aviation frequency domain electromagnetic emission system and a control method. A broadband frequency mixing and matching circuit is connected in series between an H-bridge power inverter and an emission coil of an unmanned aerial vehicle electromagnetic emission system; the broadband mixing and matching circuit comprises a first resonance unit formed by connecting a fixed capacitor and an adjustable inductor in parallel and a second resonance unit formed by connecting a fixed capacitor and an adjustable inductor in parallel, and the first resonance unit and the second resonance unit are connected in series. The adjustable inductor is matched with the dynamic impedance of the inductive load by adjusting the inductance value, and the broadband frequency mixing and matching circuit can adjust the impedance in real time, so that the matching of different resonant frequencies is realized, and the frequency range of a matching signal can be obviously widened.

The invention discloses a sea water area karst cave group transient electromagnetic collaborative investigation data processing method and system, and the method comprises the steps: transmitting a wide frequency spectrum excitation signal to the seabed through a shipborne transient electromagnetic transmitting system, and synchronously collecting a secondary field attenuation signal responded by a seabed medium through a pull-type receiving array, meanwhile, a distributed sensor network is arranged at a preset seabed node to collect background noise base data; performing motion attitude compensation on the secondary field attenuation signal to generate transient electromagnetic response data; constructing an adaptive filter based on the background noise base data, performing noise suppression processing on the transient electromagnetic response data, and outputting noise suppression data; and performing space-time alignment on the noise suppression data of the towed array and the seabed node data to form a three-dimensional space sampling data set. According to the method, high-precision fusion of deep and shallow detection data and quantitative evaluation of the stability of the karst cave are realized, and the detection reliability and the engineering risk early warning capability of the complex ocean karst area are remarkably improved.

The invention provides a low-altitude logistics distribution method and system based on an electromagnetic launching unmanned aerial vehicle technology, and the method comprises the steps: installing a modular electromagnetic launching system in a designated region of a first logistics park; the unmanned aerial vehicle is connected with the modular electromagnetic emission system, and cargo loading and parameter calibration are carried out; dynamically planning a flight route of the unmanned aerial vehicle from the first logistics park to the second logistics park; the electromagnetic emission system is started to accelerate the unmanned aerial vehicle, and the pulse power modulation technology is utilized to control the output of specific pulse power in different stages, so that the unmanned aerial vehicle reaches a specified take-off speed within a preset distance range; the unmanned aerial vehicle autonomously flies along the flight route and autonomously performs obstacle avoidance and path correction, and the flight route or task sequence of the unmanned aerial vehicle is dynamically adjusted; and deploying a modular catapult stopping system in the second logistics park to complete stopping of the unmanned aerial vehicle. According to the invention, the acceleration efficiency can be improved to ensure that the unmanned aerial vehicle keeps a safe distance from the obstacle while keeping the distribution efficiency.

Systems and methods for a wireless power transfer system are provided. A resonator arrangement includes a housing, a magnetic core positioned within the housing and defining an annular groove, a coil element positioned within the annular groove and configured to generate a first magnetic field, and a counter-coil element positioned proximate the coil element, the counter-coil element configured to generate a second magnetic field that is out of phase with the first magnetic field to facilitate reducing far-field electromagnetic emissions.

The embodiment of the invention relates to a touch panel, a touch screen and touch equipment. The touch panel comprises a capacitive sensing electrode and a plurality of touch electrodes, wherein the capacitive sensing electrode comprises a plurality of first capacitive electrodes extending along a first direction and a plurality of second capacitive electrodes extending along a second direction; one of the first capacitor electrode and the second capacitor electrode is a capacitor transmitting electrode, the other one of the first capacitor electrode and the second capacitor electrode is a capacitor receiving electrode, and the first direction is different from the second direction; the electromagnetic induction electrodes comprise a plurality of first electromagnetic electrodes and a plurality of second electromagnetic electrodes, the electromagnetic induction electrodes and the capacitance induction electrodes are arranged at intervals, one of the first electromagnetic electrodes and the second electromagnetic electrodes is an electromagnetic emission electrode, and the other one of the first electromagnetic electrodes and the second electromagnetic electrodes is an electromagnetic receiving electrode; wherein at least part of the electromagnetic induction electrodes and the capacitive induction electrodes are arranged in the same layer at intervals, and at least part of the electromagnetic induction electrodes arranged in the same layer as the capacitive induction electrodes are arranged in the capacitive induction electrodes.

The invention relates to the field of electromagnetic detection, and discloses a transient electromagnetic transmitting system adaptive resistance network device and a design method, and the device comprises a transmitter transmitting coil, a Hall sensor, an AD conversion module, a controller, a relay and a resistance network. The Hall sensor is used for detecting emission current of an emission coil of the transmitter; the Hall sensor is electrically connected with the AD conversion module; the controller is electrically connected with the relay and the AD conversion module; the relay is electrically connected with the resistance network; according to the invention, the impedance matching of the transmitting coil is accurately optimized by automatically adjusting ten resistors with different resistance values (ranging from 1 ohm to 1024 ohm) which are connected in parallel and combining a greedy algorithm, linear regression analysis and an adaptive algorithm, so that the transmitting current is ensured to be stable and rapidly reduced to an ideal critical damping state.

The invention discloses a multi-channel transient electromagnetic detection method and device for a tunnel face, and relates to the technical field of geophysical information, and the method comprises the steps: planning horizontal measuring lines for the tunnel face at equal intervals, and planning measuring points on each measuring line at equal intervals; building a multi-channel detection array composed of a transient electromagnetic receiving coil and a transient electromagnetic transmitting coil, and carrying out primary field zero magnetic flux point adjustment; the method comprises the following steps: setting emission parameters according to detection depth and resolution requirements, then emitting bipolar square waves, carrying out measurement point-by-measurement observation by using an adjusted multi-channel detection array, constructing a geometric network which takes measurement lines, measurement points and channel numbers as indexes according to observation data, and carrying out multi-channel combined three-dimensional imaging. By constructing a multi-channel detection array, the data volume of a measuring point is increased, and the fineness of three-dimensional imaging is improved; through primary field zero magnetic flux point adjustment, the influence of a primary magnetic field is counteracted, and the signal-to-noise ratio of data is improved.

The invention relates to the field of equipment testing, and discloses an EMC testing method and system for an electronic product, and the method comprises the steps: obtaining product information, obtaining an EMC testing strategy of the product in a cloud data server, and enabling the EMC testing strategy to comprise an EMI testing strategy and an EMS testing strategy; the method comprises the following steps of: obtaining products to be tested from produced products according to a set proportion, dividing the products to be tested into an EMI test group and an electromagnetic sensitivity test group, carrying out electromagnetic emission test on the electromagnetic emission test group, carrying out electromagnetic sensitivity test on the electromagnetic sensitivity test group, and according to an electromagnetic sensitivity qualification rate and an electromagnetic emission test qualification rate, carrying out electromagnetic sensitivity test on the products to be tested. And obtaining the qualified rate of the to-be-tested product according to the product classification and the qualified rate, obtaining the EMC data of the to-be-tested product, and completing the EMC test of the electronic product. The EMC performance qualification rate of the product is obtained by comprehensively evaluating the results of the electromagnetic emission test and the electromagnetic sensitivity test, and powerful support is provided for quality control of the product.

An intelligent anesthetization system for transperineal prostate puncturing based on multimodal medical images is provided. The system includes a coordinate system definition module, a markup of MRI sequence image and 3D reconstruction module, an ultrasonic data extraction module, a registration module and an anesthetic planning module. This system transforms images in the preoperative nuclear magnetic imaging coordinate system as well as the target area of anesthetization into real-time electromagnetic emitter coordinate system through multimodal medical image registration, thereby realizing the comprehensive fusion of the target area of anesthetization in nuclear magnetic resonance image and ultrasonic image, which can be used for medical teaching or surgical guidance and can help to achieve precise positioning of anesthetized area for transperineal prostate biopsy.

The invention discloses an electromagnetic emission test method of an intelligent household electrical appliance, which simulates a dynamic interaction process by controlling multiple modules to run simultaneously according to a preset logic, and comprises the following steps: acquiring electromagnetic signals in real time and performing frequency domain conversion to obtain frequency spectrum distribution; identifying a target frequency band which generates energy convergence due to non-linear superposition and peak intensity of the target frequency band; obtaining a superposition waveform sequence and classifying a nonlinear superposition mode; identifying an abnormal interference mode by combining the peak intensity and a mode classification result; associating the abnormal frequency band with the module operation log, and analyzing an interaction time sequence and logic to determine a cause; a filtering or regulation strategy is applied based on the cause, whether the peak value is reduced is verified and a report is generated. According to the invention, through energy convergence frequency band identification, non-linear superposition mode classification, interference cause tracing, directional regulation and closed-loop verification, accurate diagnosis and root positioning of hidden transient interference are realized, so that the test depth is improved, the rectification efficiency is optimized, and the predictability of product electromagnetic compatibility design is enhanced.

The invention relates to the technical field of exploration geophysics. The time-frequency domain three-dimensional forward modeling and feature analysis method based on the controllable source electromagnetic method comprises the steps that electrical parameter measurement processing is conducted on a target area rock ore specimen, and an electrical parameter set is obtained; based on the electrical parameter set, performing electrical category division processing through clustering analysis to generate an electrical classification knowledge base; acquiring an electromagnetic emission signal; performing time domain forward modeling calculation processing to obtain transient response; based on the electromagnetic emission signal and the electrical property classification knowledge base, performing frequency domain forward modeling calculation processing to obtain a specified frequency band response; performing parameter iterative optimization processing to generate a three-dimensional electrical parameter model; performing abnormal region extraction processing based on the three-dimensional electrical parameter model to obtain a target abnormal region; and carrying out boundary delineation processing on the target body to obtain a spatial position of the target body so as to achieve the technical effects of improving the characterization precision of the electrical parameters, reducing the reconstruction distortion of the time-frequency response and enhancing the geological interpretability of an inversion result.

The invention discloses a seabed dipole-dipole electromagnetic detection system and method carried on a remote control underwater robot, and belongs to the technical field of seabed metal mineral resource fine exploration. The system comprises a remote control underwater robot (ROV), a retractable receiving coil extension bracket, a transient electromagnetic transmitting coil, a transient electromagnetic receiving coil, a transient electromagnetic main engine room and an instrument fixing bracket. The extension bracket is controlled through the hydraulic retraction device, so that the receiving coil is arranged away from the ROV body, and the interference of the equipment body on electromagnetic signals is obviously reduced. The ROV performs low-altitude cruising on the seabed along a preset fine measuring line to acquire transient electromagnetic data, and the actually measured data is corrected in real time by using the full-space seawater environment response in the diving process, so that the system interference is effectively inhibited. According to the method, the high-resolution electromagnetic detection capability of ore bodies such as seabed polymetallic sulfide is improved, and the method is suitable for mineral resource investigation of complex terrains and small-scale regions.

A wireless induction power supply air circulation fan comprises a fan assembly and a seat body, the seat body comprises a fixed seat and a rotating seat rotationally connected to the fixed seat, and the fan assembly is assembled on the rotating seat; the driving device is used for driving the rotating seat to rotate along the end surface of the fixed seat; the power supply device is used for being electrically connected with the fan assembly and providing a starting power supply for the fan assembly, and the power supply device comprises an electromagnetic emission assembly used for generating a magnetic field; and the electromagnetic receiving assembly and the electromagnetic transmitting assembly are correspondingly arranged in the rotating shaft, and the electromagnetic receiving assembly is used for providing a driving power supply. According to the electromagnetic induction principle, a wireless induction power supply mode is adopted for supplying power to the fan assembly, so that the fan can be driven to rotate under the condition that a power line is omitted, real uninterrupted and dead-angle-free 360-degree rotary motion is achieved, and the blowing requirement of a user is met.

The invention relates to the technical field of geophysical exploration, in particular to a semi-aviation transient electromagnetic detection system based on cooperation of a robot dog and an unmanned aerial vehicle, and the system consists of a robot dog platform, an unmanned aerial vehicle platform and a ground control station. The robot dog platform comprises a high-power transient electromagnetic transmitter, a line source laying module, a voice warning module and a mobile positioning module, and can automatically lay a line source and inject pulse current to the ground; the unmanned aerial vehicle platform comprises a visual field auxiliary module, a flight driving module and a receiving coil, and the coil can be dragged according to a preset route to collect electromagnetic data; the ground control station is used for job scheduling and data processing. Wiring-transmitting-receiving integrated collaborative operation is realized through the robot dog and the unmanned aerial vehicle, and the robot is suitable for detection of a complex mountain environment.

The invention provides an adjustable electromagnetic compatibility test device, and relates to the technical field of electromagnetic compatibility, and the device comprises a pedestal which is placed at a flat position in a test area when in use, an electromagnetic launching cylinder is fixedly arranged at one end of the pedestal along a vertical axis, and the intensity of electromagnetic waves generated by the electromagnetic launching cylinder is adjustable. The detection cylinder is detachably connected to the end, away from the base, of the electromagnetic launching cylinder, detected equipment is placed in the detection cylinder, the heating cover is detachably embedded in the end, away from the electromagnetic launching cylinder, of the detection cylinder, the temperature can be adjusted through the heating cover, and the electromagnetic launching cylinder emits electromagnetic waves with different intensities. Therefore, the electromagnetic environment in the detection cylinder is changed, namely the detected equipment is detected in different electromagnetic environments. The problem that the anti-interference limit range of equipment cannot be measured during measurement due to the fact that the electromagnetic wave intensity and the temperature cannot be adjusted in the detection process of an existing test device is solved.

The invention discloses an electrical source transient electromagnetic ground-air detection method and system, and relates to the technical field of geophysical exploration. The method comprises the following specific steps: arranging a transient electromagnetic transmitting device and a receiving device in a detection area; carrying out ground-air transient electromagnetic measurement at different flight height positions to obtain a transient electromagnetic data total set; preprocessing electromagnetic data in the transient electromagnetic data set to obtain preprocessed data; data interpretation is carried out on the preprocessed data, an underground electrical structure is reconstructed by using an inversion algorithm, and a resistivity distribution image of the underground geologic body is obtained to identify a low-resistance abnormal region; and based on an inversion result, expressing spatial distribution and physical property parameters of the deep geologic body by adopting a three-dimensional modeling technology. According to the invention, the deep geological target body can be accurately explored, so that the accurate and detailed geological information of the deep geological target body can be obtained.

The invention belongs to the technical field of electronic system engineering, and discloses a digital channelized filtering electromagnetic compatibility management and control method. The invention provides a digital channelized filtering electromagnetic compatibility management and control method aiming at the situation that the interception probability of reconnaissance equipment is reduced by electromagnetic time domain management and control of a multi-sensor integrated system. According to the method, digital channelization filtering of a reconnaissance broadband receiver is used for filtering signals of transmitting frequency points of electromagnetic transmitting equipment in real time or limiting the frequency points of the electromagnetic transmitting equipment according to a channel where a high-value radiation source target is located, so that receiving / transmitting influences between equipment in a system are reduced; and the signal interception probability of the reconnaissance equipment in the multi-sensor integrated system is improved.

The present invention belongs to the technical field of material surface treatment, and discloses a method for enhancing the ablation resistance performance of an armature by selective laser melting and injecting refractory metals, which includes the following steps: grinding and cleaning the surface of the armature to be enhanced; designing the selective laser melting and injecting structure on the surface of the armature into different shapes according to the electromagnetic emission working conditions and the ablation characteristics of the armature; setting laser parameters, feeding refractory metal powder onto the surface of the armature to be enhanced based on the shape of the selective laser melting and injecting structure, and using the laser to perform laser melting and injection on the surface of the armature to be enhanced to form a melted and injected layer. After multiple meltings and injections, an enhanced armature composite structure with an alternating distribution of strengthened area melted and injected layers and non-strengthened areas is obtained on the surface of the armature. The present invention can solve the transition ablation problem caused by severe ablation of the armature in existing electromagnetic railguns.

A method for determining positional information of a target organ of a human subject during a biomagnetic field scan comprises detecting, by a plurality of magnetometers, first biomagnetic field signals from at least a portion of the human subject's organ and second magnetic field signals from an electromagnetic transmitter positioned on a predetermined position of the human subject. The plurality of magnetometers have a known position during the biomagnetic field scan. The method includes determining a time-varying spatial relationship between the electromagnetic transmitter and the plurality of magnetometers based on the detected second magnetic field signals. The method further includes correcting artifacts in the detected first biomagnetic signals in accordance with the determined spatial relationship.

The invention discloses an electromagnetic track damage detection method and system for multi-field coupling analysis, and relates to the technical field of electromagnetic track launching devices.The electromagnetic track damage detection method comprises the steps that simulated pivot track loop pulse current, armature mechanical parameters and armature kinematics parameters are obtained and imported into an electromagnetic heat multi-physics field coupling model, and a field-circuit coupling model is obtained; obtaining current density and temperature distribution along the boundary of the pivot rail contact interface and the boundary of the inner side of the armature groove in the simulation process under multi-physics field coupling; the optimal initial position of armature placement is determined according to the change of the current density and the temperature under different armature placement initial positions, and the optimal track material is determined according to the change of the current density and the temperature under different set electromagnetic emitter track materials; an electromagnetic track launching system simulation experiment platform is built, surface damage at different positions of a track is tested under different pulse current peak values and launching times, and track surface accumulated wear and ablation damage characteristics under different working conditions are clear.

The invention discloses an electromagnetic interference risk assessment method based on expert knowledge and a neural network, and the method comprises the steps: building an electromagnetic interference risk assessment index system of a to-be-assessed object, bottom layer indexes of the index system comprise a power grid ripple coefficient, power grid peak signal conduction emission, power grid harmonic characteristics, electromagnetic emission characteristics, electromagnetic sensitivity characteristics, filtering characteristics and conduction and radiation safety margin. Establishing a potential interference source and potential sensitive equipment electromagnetic compatibility evaluation data set by using an expert knowledge method; and using the neural network to carry out electromagnetic interference risk assessment training and assessment of the to-be-assessed object. The method can give full play to the advantages of strong pertinence and high flexibility of expert knowledge and the advantages of strong ability of automatic knowledge acquisition and nonlinear mapping of a neural network, and realizes adaptive assessment of electromagnetic interference risks according to real-time acquisition and analysis of an electromagnetic environment; according to the method, manual parameter setting is not needed any more, the evaluation process is easier to implement, and the reliability of the evaluation result is higher.

The invention belongs to the technical field of seabed hole domain electromagnetic detection, and relates to a hybrid multi-frequency reactive compensation method for a seabed electromagnetic emission system, which comprises the following steps of: designing a topological structure of a hybrid multi-frequency reactive compensation system according to an impedance matching requirement of a low-frequency emission frequency band of the seabed electromagnetic emission system; deducing a compensation strategy and an implementation method of the hybrid multi-frequency reactive power compensation system based on the multi-frequency reactive power compensation requirement of the load; and analyzing the influence of the reactive compensation combination proportion of the impedance matching part of the passive TCC and the impedance matching part of the active ICC on the requirement of the direct-current power supply voltage VICC, and carrying out parameter design of the passive TCC and the active ICC. According to the hybrid multi-frequency reactive compensation technology, the single-frequency reactive compensation capability is further expanded into self-adaptive dynamic compensation of multi-frequency reactive power in a wide frequency band; the additionally introduced active impedance matching part effectively improves the multi-frequency impedance matching precision, and the frequency spectrum energy utilization rate of multi-frequency transmitting signals is further improved in a low-frequency transmitting frequency band.

The invention discloses a short-offset transient electromagnetic transmitting system, which comprises an electromagnetic transmitter with four transmitting power supplies P1, P2, P3 and P4, five groups of grounding electrodes A, B, C, D and F and eight transmitting leads LA, LB1, LB2, LC1, LC2, LD1, LD2 and LE, and is characterized in that the grounding electrode A and the grounding electrode B are connected to the transmitting power supply P1 through a lead A and a lead LB1; the grounding electrode B and the grounding electrode C are connected to an emission power supply P2 through a lead LB2 and a lead LC1; the grounding electrode C and the grounding electrode D are connected to an emission power supply P3 through a lead LC2 and a lead LD1; the grounding electrode D and the grounding electrode E are connected to an emission power supply P4 through a wire LD2 and a wire LE; the lead LA and the lead LB1 are pulled to the position of the grounding electrode B from the transmitter in a twisted-pair manner; and the wire LD2 and the wire LE are pulled to an electrode grounding D position from the transmitter in a twisted-pair manner. By adopting the technical scheme of the invention, the electromagnetic emission system can effectively adapt to the SOTEM method.

The invention discloses a pivot rail current-carrying ultra-high-speed friction experiment device which comprises an electromagnetic rail emitter and a friction assembly, the friction assembly comprises a clamping and fixing unit, a rail supporting unit and a friction rail unit, and the friction rail unit comprises an upper friction rail and a lower friction rail. The rail supporting unit supports the upper friction rail and the lower friction rail, and a pill channel allowing pills of the electromagnetic rail dispeller to pass through is formed between the upper friction rail and the lower friction rail. The clamping and fixing unit clamps and fixes the rail supporting unit and the friction rail unit to the transmitting end of the electromagnetic rail transmitter. According to the invention, through cooperation of the electromagnetic emitter and the friction assembly, the shot projectile of the electromagnetic emitter passes through the friction assembly at a high speed to generate frictional contact, and the friction performance of the material can be comprehensively tested under ultrahigh-speed sliding friction, so that the performance research level of the material under a high-speed friction condition is improved.

The invention belongs to the technical field of electromagnetic detection, and particularly relates to an electromagnetic detection transmitting system for urban underground space and a control method, the electromagnetic detection transmitting system comprises a direct current power supply, an inverter and a load which form a traditional electromagnetic transmitting circuit, and a composite impedance matching network is connected in series between the inverter and the load; the composite impedance matching network comprises an active matching network and a passive matching network, the active matching network comprises an H bridge circuit composed of four IGBT transistors and a coupling transformer, one output end of the inverter passes through one end of the secondary side of the coupling transformer, and the primary side of the coupling transformer is connected with the H bridge circuit; and one end of the passive matching network is connected with the other end of the secondary side of the coupling transformer, the other end of the passive matching network is connected with one end of the load, and the other end of the load is connected with the other output end of the inverter, so that the situation that the emission energy of the full-aviation emission system of the unmanned aerial vehicle is weakened due to dynamic impedance change generated in actual motion is avoided.

An example apparatus and optical emission device for preventing the transmission of electromagnetic radiation to and from targeted electrical components of an electronic device are provided. The example apparatus may include an optical emissions component electrically connected to a target electrical portion and configured to generate an optical output. The example apparatus may further include a wire bond electromagnetic interference cage configured to block the passage of electromagnetic emissions. The wire bond electromagnetic interference cage may include a plurality of bond wires, wherein each bond wire is electrically coupled to an electrical ground, and wherein the wire bond electromagnetic interference cage overlays at least a portion of the target electrical portion. In addition, the wire bond electromagnetic interference cage may further define an electromagnetic interference cage opening through which the optical output passes.

The invention belongs to the technical field of electromagnetic detection, and particularly relates to a self-adaptive multi-frequency resonance matching system and a design method, the self-adaptive multi-frequency resonance matching system comprises a magnetic coupling resonance module and a controllable variable impedance unit which are connected in series, a switch control capacitor comprises a matching capacitor and a control switch which are connected in parallel, and a switch control inductor comprises a matching inductor and a control switch which are connected in series; the magnetic coupling resonance module comprises an inductor and a capacitor, and the capacitor is connected with the inductor in parallel and then connected with the inductor in series. The signal strength of the multi-frequency grounding type electromagnetic transmitter is improved, and efficient transmission of the multi-frequency excitation signals is achieved.

The utility model discloses an electromagnetic induction eddy current heating electromagnetic emitter with magnetic shielding, the electromagnetic emitter comprises a magnetic shielding cover (1), a coil (2) and a coil support (3), the coil (2) comprises a coil main body (21) formed by conducting wires and a pair of coil pins (22), the coil support (3) comprises a support wall (31), a support bottom (32) located at the lower end of the support wall (31) and a pin through hole (33), and the support wall (31) is connected with the support bottom (32). The coil body (21) is arranged on the coil support (3), the coil pins (22) penetrate out of the pin through holes (33), and the coil body (21) is located in a coil space (14) defined by the coil support (3) and the magnetic shielding cover (1). The structure of the magnetic induction coil assembly is simplified, the magnetic shielding efficiency is improved, the provided electromagnetic emitter is high in integration degree, large-scale assembly production is facilitated, and the production efficiency of electronic cigarette appliances can be effectively improved.