433 results about "Shielding effect" patented technology

The invention discloses a test system and method for providing a large weak magnetic space based on a high-frequency magnetic field, relates to the technical field of magnetic shielding coefficient test of a magnetic shielding space, and mainly aims to solve the problems that the internal space of existing equipment for providing the weak magnetic space is small; the system comprises a high-frequency magnetic field emission module, a magnetic field intensity acquisition module and a passive magnetic shielding assembly. The high-frequency magnetic field transmitting module comprises at least one pair of large coils with the same number of winding turns, and the large coils are coaxially arranged in parallel and used for transmitting a high-frequency magnetic field to the passive magnetic shielding assembly; the passive magnetic shielding assembly provides a weak magnetic space after performing a magnetic shielding effect on the high-frequency magnetic field; and the magnetic field intensity acquisition module is used for acquiring and recording the magnetic field intensity in the weak magnetic space in the passive magnetic shielding assembly.

The invention provides a magnetic shielding box for weak magnetic signal measurement and a shielding effectiveness estimation method. The magnetic shielding box comprises a non-magnetic supporting frame and a shielding mechanism. The non-magnetic supporting frame is a cuboid, is at least arranged along the edges of the cuboid and is used for supporting the shielding mechanism, and the interior of the non-magnetic supporting frame is hollow so as to accommodate an object to be detected; the shielding mechanism at least comprises N layers of plate layer structures, plate layer fixing pieces and plate layer supporting pieces; the plate layer structures are sequentially arranged outside the non-magnetic supporting frame in a sleeving mode so as to isolate an external magnetic field of the magnetic shielding box. The plate layer fixing piece sequentially penetrates through all the plate layer structures and is fixedly embedded into the non-magnetic supporting frame. The plate layer supporting pieces are at least arranged between the two adjacent plate layer structures and used for controlling the distance between the two adjacent plate layer structures. N is an integer greater than or equal to 2. The problem of complex manufacturing of the magnetic shielding box can be solved, and the shielding effects of different frequency bands are ensured.

The utility model relates to the field of electromagnetic shielding films, in particular to an electromagnetic shielding film, which comprises a multi-layer composite structure and is characterized in that the electromagnetic shielding film is formed by compounding at least four layers of materials, namely a base material layer 1, a conductive grid layer 2, an electromagnetic absorption layer 3 and a protective layer 4 in sequence; the base material layer 1 adopts a light high-strength polymer film as a substrate and has excellent flexibility and mechanical strength; the conductive grid layer 2 is located on the base material layer 1, is of a grid structure formed by fine metal wires or high-conductivity polymer fibers, is formed through a precise weaving or printing technology and is used for guiding and dispersing electromagnetic wave energy; the technical problem that the service life and the shielding effect of the electromagnetic shielding film are affected due to the fact that the electromagnetic shielding film is prone to abrasion, scraping and the like in the long-term use process is solved.

The invention discloses an electric leakage detection method of an explosion-proof distribution box, particularly relates to the technical field of electric power safety in flammable and explosive environments, and is used for solving the problems of electric leakage signal attenuation and insufficient detection sensitivity caused by an eddy current effect of a metal explosion-proof shell. An original electric leakage signal of a wire in a box is obtained, and an eddy current compensation factor is constructed based on the material and thickness of a shell to carry out gain compensation; shell surface temperature distribution and three-dimensional magnetic field components are synchronously collected, and a compensation failure state is judged through collaborative analysis of high-temperature area migration acceleration and magnetic field polarization angle offset; when the compensation is effective, the area score of the space magnetic field rotation on the surface of the shell is calculated, and when the time change gradient exceeds a preset threshold value, the tripping action is triggered, the shielding effect of shell eddy current on weak electric leakage signals is broken through, and high-sensitivity electric leakage protection is realized while the explosion-proof integrity is maintained.

The invention discloses a ferromagnetic material internal defect leakage magnetic field increasing method based on alternating current and direct current composite magnetization, which comprises the following steps of: fixing a workpiece at the center of a composite exciting coil, and synchronously applying direct current and high-frequency alternating current; after pure direct current magnetization is saturated, current is locked, and a basic leakage magnetic field is established; the surface magnetic conductivity is dynamically reduced by overlapping alternating current, and the magnetic shielding effect is weakened; a leakage magnetic field signal is scanned and collected through a differential Hall sensor array, and background magnetic field deduction, peak value comparison and adaptive filtering processing are carried out; and determining an optimal magnetization parameter combination by adopting a gradient descent method and Bayesian optimization. The system is integrated with a composite excitation coil and a signal conditioning unit, so that synchronous excitation, signal acquisition and real-time analysis are realized. The leakage magnetic field signal at the deep defect is enhanced through alternating-current and direct-current composite magnetization, the problem of signal weakening caused by traditional direct-current saturation is solved, the defect detection sensitivity and efficiency are improved, and the method is suitable for non-destructive detection scenes of ferromagnetic materials.

The invention discloses a gear micro-texture current-assisted laser processing method and device. The method comprises the steps that a gear three-dimensional model is established, and a curved surface processing path is generated; a laser is controlled to emit laser, the gear space attitude is adjusted, a dynamic focus lens is controlled to adjust the focal length of a laser beam based on a curved surface machining path, an X-direction galvanometer and a Y-direction galvanometer are controlled to adjust the direction and angle of the laser beam, and a laser spot is focused on a to-be-machined area of the gear; meanwhile, high-frequency pulse current is applied to the to-be-machined area, and the current waveform is sine wave; and high-pressure airflow is jetted. The laser energy absorption rate of the gear surface is increased, the temperature field is homogenized, and the plasma shielding effect is weakened, so that the integrity and uniformity of the texture contour are improved, splashing and burrs are reduced, and the machining quality and efficiency are improved. And machining is suitable for the complex curved surface of the gear, high-precision and high-consistency micro-texture machining is achieved, and the requirements for lubrication, friction reduction and fatigue resistance of a high-end gear are met.

The invention relates to a moderator of a compact single-ball neutron spectrometer, and the moderator is characterized in that an inner layer is of a cylindrical structure, and a plurality of thermal neutron detectors are installed in the inner layer; the thermal neutron absorption layer sleeves the outer side of the inner layer and is made of boron-containing polyethylene; the scattered neutron moderation layer sleeves the outer side of the thermal neutron absorption layer; the inner layer comprises a detector placing block and a thermal neutron absorption block, and the thermal neutron absorption block is provided with a storage groove; a plurality of thermal neutron detectors are placed in the detector placement block along the axis direction, the first thermal neutron detector is placed in the storage groove, and the thermal neutron absorption block is made of boron-containing polyethylene; the diameter of the inner layer is 8 cm, the outer diameter of the thermal neutron absorption layer is 14 cm, and the outer diameter of the scattered neutron moderation layer is 20 cm. The purposes that the size is controlled by controlling the diameter of the cylindrical structure and the scattering shielding effect is enhanced by arranging the three layers of moderator structures in a sleeving mode are achieved, and therefore the technical effects that the moderator is small in size, convenient to transport and high in scattering shielding effect are achieved.

The invention discloses a nuclear accident dynamic safe operation time assessment method and system based on data fusion, relates to the technical field of nuclear radiation protection, and solves the technical problems that the safe operation time is not accurate enough and dynamic dose assessment is difficult in nuclear accident emergency response. According to the technical scheme, nuclear accident prediction data and site real-time monitoring data are fused, a data assimilation fusion algorithm and an intelligent analysis model are combined, the radiation dose and environmental conditions of an accident site are comprehensively evaluated, and safety operation time and risk levels of different areas are dynamically calculated and updated; by considering the building shielding effect and supporting the federated learning framework, the cooperative evaluation of multiple monitoring points is realized, so that the operation time evaluation precision and decision-making efficiency in the nuclear accident emergency response are greatly improved. Finally, operation suggestions can be fed back and updated in real time, and the real-time performance and accuracy of emergency command decisions are ensured.

The utility model relates to a mounting structure of PCB board large current conductor, this mounting structure includes metal base, PCB board, large current conductor and upper shell, the recessed groove for the large current conductor inlay is integrally arranged on the metal base, the PCB board sets up on the upper surface of metal base, the utility model discloses through embedding the large current conductor on the PCB board into the recessed groove inside the metal base, realizes the all -round metal surrounding and shielding of large current conductor, effectively avoids the electric field, magnetic field signal radiation to outside of the current on the large current conductor, realizes better EMC shielding effect.

The application relates to the field of wastewater treatment catalysis, and discloses a Fe-Cu-Mn ternary hydrotalcite-like catalyst and a preparation method thereof, which comprises iron, copper and manganese; the iron, copper and manganese are distributed in the layer plate metal central site in an atomic dispersion mode; the layer plate oxygen octahedron is in a non-symmetrical stretching distortion state; a 3.2-4.8 degree deviation is generated in the manganese oxygen copper bond angle in the layer plate; the lattice parameter a of the layer plate 110 crystal face direction is 0.305-0.312 nm; the molar ratio of copper to manganese is 1:2-1:5; and the molar sum of copper and manganese to the molar ratio of iron is 2:1-4:1. According to the application, the lattice non-symmetrical distortion induces the space overlap of the auxiliary metal and the iron active center orbit, an electron transfer path is constructed, the shielding effect of the hydroxyl ion on the iron active site under the alkaline environment is eliminated, the catalytic site activity is maintained, and stable and efficient catalytic treatment under wide pH working conditions is realized.

A dual-mode asymmetric P-I-N perovskite radiation detector and its fabrication method are disclosed, belonging to the field of radiation detector technology. The method first involves preparing a perovskite single-crystal precursor solution. A small amount of this solution is used for seed crystal growth at a constant temperature, with the seed crystal serving as the seed for CsPbBr3 single-crystal growth on a P-type substrate. Next, a MAPbBr3 solution is prepared, and MAPbBr3 single crystals are grown to form the I layer. Finally, MAPbBr3 (Bi) is prepared... 3+ A doped solution was used to grow MAPbBr3 (Bi) as the N-layer. 3+ A dual-mode asymmetric P-I-N perovskite radiation detector is obtained by fabricating top and bottom electrodes using a doped single crystal. This invention utilizes the forward conduction and reverse cutoff characteristics of the P-I-N structure. When a negative voltage is applied to the N layer for forward bias, X-rays incident on the P layer are used for radiation detection, exciting the photoconductivity gain and achieving a sensitivity far exceeding that of CsPbBr3 single crystals; simultaneously, MAPbBr3 (Bi 3+ The doped single crystal has a natural shielding effect on soft X-rays, enabling high-sensitivity detection of hard X-rays in the I layer when X-rays are incident on the N layer with positive pressure and reverse P-I-N bias.

The invention provides a reflective polarized brightness enhancement film capable of replacing a diffusion plate and a preparation method of the reflective polarized brightness enhancement film, and relates to the technical field of optical thin films. According to the reflective polarization brightness enhancement film, through the three-layer integrated design of the upper reflective polarization composite film, the middle micro-scattering dodging layer and the lower strong-scattering shielding layer, the reflective polarization brightness enhancement film can directly replace an independently-arranged diffusion plate in a liquid crystal display backlight module. Experiments prove that the reflective polarized brightness enhancement film disclosed by the invention has a relatively good shielding effect while keeping relatively high brightness. Besides, the reflection type polarized light brightness enhancement film can directly replace an independently-arranged diffusion plate in the liquid crystal display backlight module, the thickness of the backlight module can be reduced, the weight can be reduced, the material and assembly cost can be reduced, and light, thin and low-cost display product design can be achieved.

The invention discloses a hollow microsphere with electromagnetic absorption performance and a preparation method and application thereof. Each hollow microsphere structurally comprises a glass hollow microsphere and a metal layer coated on the glass hollow microsphere, and the metal layer is made of nickel; the solid nickel sulfide particles are embedded in the metal layer, and the nickel sulfide particles are at least partially exposed on the outer surface of the metal layer. When being used as a wave-absorbing material (wave-absorbing agent), the hollow microspheres provided by the invention have low density, good structural stability and excellent microwave absorbing and shielding effects.

The application belongs to the field of new materials, and discloses a lead-free perovskite X-ray shielding composite material and a preparation method and application thereof, and comprises the following steps: mixing ANF / DMSO dispersion liquid with ethanol to obtain re-protonated ANF dispersion liquid; mixing the re-protonated ANF dispersion liquid, CsI powder and ethanol, and stirring to obtain two portions of the same CsI / ANF dispersion liquid; mixing re-protonated ANF, Cs3Bi2I9 powder and ethanol, and stirring to obtain Cs3Bi2I9 / ANF dispersion liquid; sequentially filtering the first portion of CsI / ANF dispersion liquid, the Cs3Bi2I9 / ANF dispersion liquid and the second portion of CsI / ANF dispersion liquid by using a gel-gel method, and vacuum hot-pressing to obtain a composite gradient film with a biomimetic symmetrical structure, which is used as a lead-free perovskite X-ray shielding composite material; and the application realizes continuous and efficient X-ray shielding effect, and can improve the mechanical flexibility and thermal stability of the material.

The present disclosure discloses a wire filling welding method in a high pressure environment, comprising: S100: pretreating a workpiece to be welded, a welding wire and a target material; S200: arranging relative positions of the workpiece to be welded, the welding wire and the target material according to welding requirements; S300: heating and melting the welding wire by using a plasma as a heat source; and S400: forming a weld seam of the workpiece to be welded by using the heated and melted welding wire. The present disclosure uses the plasma as the heat source to perform welding, which can effectively avoid the shielding effect of the plasma on the laser in the high pressure environment, thereby improving the utilization rate of the laser energy.

The invention, which belongs to the technical field of the filter, provides a high-shielding-effect EMI filter comprising a housing, an inlet wire plug, an outlet wire plug, a filter circuit, a plurality of core-through capacitors, a plurality of electric wires and a reverse elimination module. An outer plate of the shell is a multi-layer composite plate, the multi-layer composite plate comprises a metal layer, a magnetic conductive material layer and a metal layer which are arranged in sequence, two metal plates are arranged in the shell, and the two metal plates and the multi-layer composite plate divide the interior of the shell into a wire inlet shielding bin, a filter circuit shielding bin and a wire outlet shielding bin; the wire inlet plug, the wire outlet plug and the filter circuit are all installed on the shell, the plurality of core-through capacitors are respectively installed on the metal plate, the reverse elimination module is installed on the outer wall of the shell and extends outwards, and the reverse elimination module is used for counteracting interference signals in an interference mode. According to the EMI filter with the high shielding effect provided by the invention, the anti-interference capability of the whole EMI filter is effectively improved, so that the filter has a high shielding characteristic.

The utility model relates to the technical field of glass, in particular to a multifunctional composite glass structure, which comprises a glass main body and an outer frame wrapped on the periphery of the glass main body, the glass main body is provided with two layers, the outer frame consists of a top plate and side plates, a cavity is arranged between the two layers of glass main bodies, and an adjustable shading component is arranged in the cavity. According to the multifunctional composite glass structure, the two shielding layers are arranged on the two sides of the high-transmittance layer of the glass body, the shielding effect can reach 100 dB, electromagnetic wave interference can be eliminated, the heating layer is arranged, the heating effect can be achieved, the defrosting and demisting functions are achieved under low-voltage driving, and due to the fact that the shading assembly is arranged, the shielding effect is good. When light is too strong and needs to be shielded, the adjusting motor is controlled to start to drive the worm to rotate, then the worm gear drives the rotating shaft and the light shielding blades to rotate by a certain angle, the light shielding blades are made to be in a vertical state, and the light intensity can be greatly weakened.

The invention belongs to the technical field of flexible ray protective clothing, and discloses medical flexible ray shielding protective clothing and a preparation method thereof. A medical flexible ray shielding protective garment comprises a shielding material, flexible rubber and a garment material, the shielding material is equally distributed in small capsule cabins of the flexible rubber, and the small capsule cabins are distributed in the thickness direction of the flexible rubber for 3-10 times; the clothing material is attached to the flexible rubber loaded with the shielding material to manufacture the clothing. The novel integrated ray protection suit provided by the invention adopts a lead-free shielding material, has a relatively good shielding effect on gamma rays and X rays, is soft in material, light in weight and non-toxic and harmless to a human body, can be widely applied to military industry, medical science, other ray protection laboratories and the like, and has a wide application value.

The application discloses a kind of arbitrary shape energized coil magnetic field calculation method considering magnetic shielding effect, it is related to the technical field of magnetic field calculation, by the technical method in the present application, in the physical scene of the existence magnetic shielding effect, arbitrary shape energized coil is equivalently converted into combination coil, then shielding coefficient considering magnetic shielding effect is added to each current-carrying straight segment, shielding coefficient is optimized by difference evolution algorithm, then the space magnetic field generated by energized coil at different positions is obtained by forward calculation;The magnetic field calculation method of the application can simplify the magnetic field calculation process of arbitrary shape energized coil under different application scenarios, improve the calculation efficiency, and has strong applicability and wide application range.

The invention discloses a laminated chip inductor and electronic equipment. The laminated chip inductor comprises an inductor main body and two ends arranged at the inductor main body along a first direction, a first hole and a second hole are respectively formed in a main body part and cover plate parts of the inductor main body, and the cover plate parts are arranged on two surfaces of the main body part along the thickness direction of the inductor main body along the thickness direction of the inductor main body. In the thickness direction of the inductor body, the ratio of the area of the second hole in the cross section of the cover plate part to the area of the cross section of the cover plate part is n1, the ratio of the area of the first hole in the cross section of the body part to the area of the cross section of the body part is n2, and n1 is smaller than n2. According to the laminated chip inductor disclosed by the invention, by controlling the porosity n1 of the cover plate part and enabling the porosity of the cover plate part to be smaller than the porosity n2 of the main body part, the shielding effect of the cover plate part on magnetic leakage radiation of the main body part is improved, so that the situation of magnetic leakage radiation of the inductor main body is improved, and interference of the laminated chip inductor on a circuit in electronic equipment can be avoided.

The embodiment of the utility model provides a shell assembly, a cable connector and an electronic system. The shell assembly comprises an insulating body and a conductive layer arranged on the inner surface and / or the outer surface of the insulating body. The insulating body comprises a matching end part, a connecting end part and a mounting channel extending from the connecting end part to the matching end part, and the mounting channel is defined by the inner surface of the insulating body; the conductive layer can be arranged on the inner surface of the insulating body, can also be arranged on the outer surface, or can be arranged on the inner and outer surfaces simultaneously. In this way, die-cast metal parts do not need to be used as the housing assembly or as part of the housing assembly, thereby allowing the insulation body to be processed into a desired complex shape according to design requirements. In addition, the weight of the shell assembly can be reduced. And the conductive layer on the surface of the insulating body can achieve a good shielding effect.

The present application relates to the technical field of head-mounted display devices, and discloses a temple connecting structure and a head-mounted display device. The temple connecting structure is used for connecting a temple and a frame, and comprises a first bracket, a second bracket, and a shielding structure. The second bracket is rotatably connected to the first bracket. One of the first bracket and the second bracket is mounted on the temple, and the other is mounted on the frame. The shielding structure is capable of shielding a fitting gap formed by the relative rotation between the first bracket and the second bracket. The technical solution provided in the present application can enhance the shielding effect of the temple connecting structure, thereby improving the appearance neatness and aesthetics of the device.

There is provided a performance testing and evaluation method for a permalloy material for construction of a magnetically-shielded room and relates to testing and evaluation on alloy shielding performance. The present disclosure aims to solve the problem of failure to satisfy the requirements of different application scenarios for the magnetic field shielding due to lack of in-depth research on the shielding effect of the current permalloy in the magnetically-shielded rooms. The method includes: at step 1, selecting a permalloy sample, and conducting quality inspection on the sample to ensure the sample is compliance with an experiment requirement; at step 2, setting up an experimental apparatus; where the permalloy sample is vertically placed, and a magnetic field generation coil and a magnetic field measuring sensor are respectively placed at left and right sides of the permalloy sample; at step 3, carrying out shielding performance testing and evaluation on the permalloy sample.

The utility model discloses a peep-proof film, a peep-proof protective film and an electronic device, the peep-proof film comprises a first adhesive layer, a peep-proof layer and a second adhesive layer, the first adhesive layer covers one side of the peep-proof layer, and the second adhesive layer covers the other side of the peep-proof layer; the peep-proof layer comprises a peep-proof body layer and a light-transmitting layer, a through hole is formed in the position, corresponding to a camera of the electronic equipment, of the peep-proof body layer, the light-transmitting layer is arranged in the through hole, and the light transmittance of the light-transmitting layer is higher than that of the peep-proof body layer. According to the peep-proof film provided by the utility model, the shielding influence of the peep-proof layer on a camera can be avoided in the use process, and when the peep-proof film is matched with the protective layer for use, fog cannot be formed below the protective layer, so that the shooting effect cannot be influenced.

This invention belongs to the field of electromagnetic shielding equipment, specifically relating to a foam honeycomb structure for electromagnetic shielding and its manufacturing method. It addresses the problem that existing absorption panels have weak structural strength and air permeability, which can affect the normal operation of electrical equipment. The structure includes several electromagnetic shielding units arranged in an array, with adjacent units interconnected and symmetrically positioned. Each electromagnetic shielding unit has an octagonal outer contour. Each unit includes a fixing member and several connecting members surrounding the fixing member. The fixing member has a first absorption hole, and each connecting member has a second absorption hole. The first and second absorption holes are oriented in the same direction. This invention provides greater stability to the foam honeycomb structure, improves air permeability by providing first and second absorption holes, facilitates heat dissipation, and allows electromagnetic waves to be scattered multiple times within the first and second absorption holes, increasing energy loss and achieving a good shielding effect.

The utility model discloses an interpretation mechanism, relates to detection equipment technical field, wherein the interpretation mechanism includes: photoelectric detection unit and shading unit, photoelectric detection unit is provided with detection end, shading unit includes first drive component, shading frame, and shading cavity and baffle plate that are provided in shading frame, shading cavity is provided with first channel, and shading cavity is provided with second channel. The first driving assembly can drive the shielding plate to close and open the first channel, and the detection end is arranged in the shading cavity and corresponds to the first channel; and the second driving assembly enables the first through hole and the first channel to be coaxial, a first temporary shading channel is formed between the first through hole and the first channel, and meanwhile the first channel is opened by the shading plate. According to the technical scheme provided by the utility model, the problem that the shading effect is poor when the existing interpretation mechanism is used can be solved.

The invention discloses a high-load transparent rare earth complex organic glass scintillator as well as a preparation method and application thereof. The scintillator comprises a polymer matrix and an ionic rare earth complex dispersed in the polymer matrix, the rare earth complex comprises coordination anions and ionic liquid cations, the coordination anions comprise rare earth ions and organic ligands, and the loading capacity of the rare earth complex in the polymer matrix can reach 80-90 wt%. According to the scintillator, an ionic liquid is introduced to construct an ionic supramolecular structure, effective isolation of a luminescence center is realized by utilizing steric hindrance and a charge shielding effect, concentration quenching is inhibited, and compatibility with a matrix is enhanced, so that the material still keeps transparency of 90% or above under an ultrahigh load. The maximum radiation luminous intensity of the scintillator is 23.9 times that of commercial LYSO, the lower detection limit is as low as 56nGy / s, and the scintillator is suitable for the fields of high-energy particle detection, X-ray imaging and the like.

The application discloses a programmable electromagnetic shield PCB for a high-frequency memory module and a signal integrity control method, and belongs to the technical field of high-frequency electronic circuits. The application solves the problem that the electromagnetic characteristics of an existing electromagnetic shield structure are fixed once the electromagnetic shield structure is manufactured, the electromagnetic shield structure cannot be dynamically adjusted according to the actual working state of the high-frequency memory module, and the shielding effect is insufficient or excessive under certain working conditions, thereby affecting the signal transmission quality. According to the application, the electromagnetic shield layer is composed of a plurality of independently addressable conductive unit arrays, and the shield control unit is combined, the shielding characteristics of the electromagnetic shield can be dynamically and adaptively adjusted according to the current working frequency of the high-frequency memory module and the real-time signal integrity parameters, the electromagnetic environment around the signal transmission path is optimized under various working conditions, and the signal integrity and system stability of the high-frequency memory module are significantly improved.

The invention discloses a laser ablated carbon / carbon composite material simulation method considering steam shielding, belongs to the field of material processing numerical simulation, and relates to a laser ablated carbon / carbon composite material simulation method considering steam shielding. According to the method, an instantaneous shielding coefficient model is established based on theoretical analysis, an instantaneous shielding coefficient is introduced into a laser heat source model, a carbon / carbon composite material equivalent homogeneous grid model is established, and a laser heat source model and a material removal rate model considering the steam shielding effect are established. And setting a physical field and boundary conditions, and constructing a laser ablation carbon / carbon composite material finite element simulation model. The unknown parameters of the instantaneous shielding coefficient model are determined through simulation calculation and experiments, and the model is solved, so that the dynamic description of the steam shielding effect is realized, and the accuracy of predicting the ablation morphology by the model is also improved. The simulation method not only reduces the solving difficulty of the model, but also significantly improves the calculation efficiency of the model and the prediction precision of the ablation hole morphology.

The invention discloses an electromagnetic shielding material, a sputter coating device and a manufacturing method of the electromagnetic shielding material, and the electromagnetic shielding material comprises a base material which is provided with a coating surface facing the outside; the metal coating film layer is covered on the coating film surface; a plurality of oxidation protection bodies are arranged, the plurality of oxidation protection bodies are dispersedly arranged on the surface, far away from the film coating surface, of the metal film coating layer to form an oxidation protection net, and the metallicity of the oxidation protection net is higher than that of the metal film coating layer, so that the metal film coating layer is prevented from being oxidized. According to the technical scheme, the oxidation protection net provides protection for the metal coating layer, the metal coating layer is prevented from being oxidized, the stability of the metal coating layer is guaranteed, and the shielding effect of the electromagnetic shielding material is improved on the whole.