323 results about "Shielding effect" patented technology

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 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 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.

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 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.

The utility model belongs to the technical field of electromagnetic shielding, particularly relates to a multilayer nested high-frequency electromagnetic shielding device, and aims to solve the problems that a single-layer box body of an existing device is extremely limited in high-frequency electromagnetic wave absorption capacity, a large amount of high-frequency electromagnetic interference is only simply reflected, the reflected electromagnetic waves are repeatedly refracted inside and outside the box body, and complex standing waves are formed. In order to solve the problems that the electromagnetic interference intensity in a box body cannot be effectively reduced and the complexity of an electromagnetic environment is aggravated, the utility model provides the following scheme: the multi-layer nested high-frequency electromagnetic shielding device comprises a shielding base, and an inner-layer shielding body, a middle-layer shielding body and an outer-layer shielding body are sequentially nested on the surface of the shielding base from inside to outside; the beneficial effects of the utility model are that the design of nesting in sequence from inside to outside enables each layer of shielding body to work cooperatively, weakens high-frequency electromagnetic interference layer by layer, and compared with a single-layer shielding structure, can cope with a complex high-frequency electromagnetic environment more comprehensively and efficiently, and significantly improves the shielding effect.

The application is suitable for the field of electric vehicle wireless charging technology, and provides a composite reactive resonance shielding coil structure and a robust optimization method thereof. The composite reactive resonance shielding coil structure is composed of nanocrystals, aluminum plates and reactive resonance shielding coils, can weaken the leakage electromagnetic field of the electric vehicle wireless charging (EV-WPT) system, ensure high energy transmission efficiency and system lightweight, and enhance the offset tolerance and shielding effect. The robust optimization method combines the Attention-Unet uncertainty agent model with the multi-objective whale optimization algorithm (MOWOA), takes the system energy transmission efficiency and the maximum value of the induced electric field intensity in the human body as the optimization target, considers the uncertainty factors, and realizes the fast multi-objective optimization design. The application provides practical application significance and theoretical guidance for the electromagnetic shielding design of the EV-WPT system, and provides a new research idea for the safety and protection of human body electromagnetic exposure.

The invention discloses an electroacoustic pulse principle-based coating debonding detector with a replaceable electrode, and relates to the field of nondestructive testing, the electroacoustic pulse principle-based coating debonding detector comprises a combined probe and a high-voltage pulse superimposer, and the combined probe comprises a detector shielding shell, a shell shielding cover, a locking ring and a combined electrode; the combined electrode comprises an electrode tip, a detection part and an electrode shielding shell, the electrode tip is fixedly connected with the electrode shielding shell, and the detection part is arranged in a closed cavity of the electrode shielding shell; the detector shielding shell is provided with an opening I and an opening II, and the shell shielding cover is detachably and fixedly connected to the opening I; the locking ring is detachably and fixedly connected to the opening II; the electrode shielding shell is arranged in an inner cavity of the detector shielding shell, the electrode tip penetrates through the locking ring, and the electrode tip is detachably and fixedly connected with the inner side wall of the locking ring; and the high-voltage pulse adder enables the direct-current high voltage and the narrow pulse to be superposed and applied to the metal substrate. According to the invention, the electrode tips with different sizes and shapes can be replaced according to the size and shape of the coating debonding area, the shielding effect is ensured, and the measurement accuracy is improved.

A ruggedizing apparatus for electronic equipment in a spacecraft is provided that can achieve both a radiation shielding effect and a heat-dissipation effect. The ruggedizing apparatus includes: a pressure vessel that is filled with a coolant and places at least a heat-generating electronic circuit of the electronic equipment within the pressure vessel, wherein the heat-generating electronic circuit is immersed in the coolant; and a forced liquid-flow generator placed within the pressure vessel, wherein the forced liquid-flow generator causes the coolant on the heat-generating electronic circuit to move away from the heat-generating electronic circuit.

The embodiment of the present application discloses a kind of circuit board and its manufacturing method, circuit board includes: shielding film assembly, shielding film assembly includes the first insulating layer, shielding layer, second insulating layer and adhesive layer of laminated arrangement, adhesive layer is provided with protruding part on the side face of second insulating layer back;Circuit substrate, circuit substrate includes line body and substrate layer, adhesive layer and substrate layer are connected, protruding part is embedded in the gap between line body, and adhesive layer covers line body;Before adhesive layer and substrate layer are connected, the volume ratio of adhesive layer in unit area and the gap volume of circuit substrate is 1~1.8.The embodiment of the present application solves the technical problem that existing shielding film and circuit board exist after pressing, affect appearance flatness, shielding film is not bad, shielding film is excessively pulled and even broken, in turn causes poor shielding effect, and reduces assembly yield.

An electrical connector includes a mounting housing, a first terminal module and a first shielding plate. The first terminal module includes a first signal terminal, a second signal terminal, a first ground terminal and a second ground terminal. Each first conductive terminal includes a first contact arm and a first connecting portion. The first connecting portion of the first ground terminal and the first connecting portion of the second ground terminal each include a first fixing portion and a first protruding portion. The first shielding plate includes a first base plate portion shielded on the first connecting portion. The first base plate portion defines at least one first mounting hole to mate with the first protruding portion.

The invention relates to the technical field of electromagnetic shielding equipment, and provides an electromagnetic shielding device and a preparation method thereof, and the device comprises a flexible substrate and liquid metal; a shielding area is formed on the flexible substrate, and a plurality of shielding runners are arranged in the flexible substrate; at least two layers of flexible substrates are arranged, the multiple shielding runners are distributed in each layer of the flexible substrates, and the shielding runners in the multiple layers of flexible substrates cover the shielding area in at least two directions with included angles; the shielding flow channel is filled with the liquid metal. In this way, due to the fact that the shielding effect on electromagnetic waves in different polarization directions is brought by the directions of the shielding flow channels in different layers, and multi-layer reflection and absorption of the electromagnetic waves are brought by the structural size difference between the shielding flow channels in different layers, the more excellent and adjustable electromagnetic shielding effect is achieved; the flexible shielding flow channel is filled with the liquid metal, so that the electromagnetic shielding device has good flexibility, and fine management and regulation of electromagnetic shielding of micro devices can be realized.

The utility model relates to the technical field of while-drilling electromagnetic detection, in particular to a while-drilling transient electromagnetic shielding layer structure based on a conductive and magnetic composite material, which comprises an annular unit, an elastic connecting piece and a micro sensor. Each annular unit is of a three-layer composite structure, the outer layer is a carbon fiber woven layer, the middle layer is a ferrite particle embedded epoxy resin matrix, and the inner layer is a high-temperature-resistant insulating ceramic coating. The elastic connecting piece realizes flexible connection through a silica gel gasket and keeps electrical communication; the micro sensor is embedded into the middle layer and used for monitoring underground environment parameters. The device also comprises a grounding assembly, a temperature compensation assembly and other preferable designs. The method can adapt to underground dynamic working conditions, the shielding performance is optimized, and the electromagnetic signal shielding effect and reliability are remarkably improved.

The invention relates to the technical field of semiconductor product preparation, in particular to an oblique etching method of a photomask optical layer, which comprises the following steps of: performing electron beam exposure on a photoresist film to enable the residual photoresist film to form a total reflection optical pattern, and etching the total reflection optical pattern on a hard masking film by taking the photoresist film as a protective layer to obtain the photomask optical layer. And finally, the hard shielding film is used as a protective layer, and the side wall of the total reflection pattern formed by the optical film has an inclination of an alpha angle through oblique dry etching, so that after a subsequent photomask is manufactured, as long as a light source acts on the photomask according to the alpha angle, light rays cannot be blocked by the thickness surface of the optical film, and the shielding effect is eliminated. It is ensured that the actual line width of the pattern formed on the wafer is equal to the designed line width, and the recording precision of the wafer can be effectively improved.

The application relates to a shielding device based on a 10kV line isolating switch, which comprises a control frame, the control frame is placed outside the isolating switch, the isolating switch comprises an insulator and a conductive part, a positioning base is arranged at the lower part of the control frame, the positioning base is clamped outside the insulator, the positioning base comprises a vertical rod and a closed ring, the upper end of the vertical rod is connected with the control frame, the closed ring is connected with the vertical rod through a hinge rod, a clamping block is arranged at the end of the closed ring away from the hinge rod, a screw rod head is arranged in the clamping block, a shielding shell is arranged above the control frame, the shielding shell is sleeved outside the conductive part, and a control mechanism is arranged in the control frame; when the device is used, workers can quickly respond to and position the isolating switch needing shielding, work efficiency is improved, and the reliability and durability of the shielding effect are ensured.

An electromagnetic-shielding sheet (1a, 1b or 1c) is provided comprising a multilayer film including at least two layers (2) of carbon nanotube nonwoven fabric, an adhesive layer (5), and a release film (6). The sheet exerts the electromagnetic-shielding effect while minimizing the thickness of carbon nanotube nonwoven fabric, is easy to handle, and is used to cover electronic parts and connections within electronic equipment.