72results about How to "Guaranteed shielding effect" patented technology

The invention discloses an electromagnetic shielding case and a circuit board, and the electromagnetic shielding case comprises a first shielding layer which is conductive; the first connecting layer is arranged on one side of the first shielding layer; and a plurality of first conductive particles, each first conductive particle is arranged in the first connecting layer, the maximum width range of each first conductive particle is 1 [mu] m-40 [mu] m, and the maximum widths of at least part of the first conductive particles are not equal. The first conductive particles with the smaller maximum width are small in protruding height at the bending position, the bending resistance is good, the first conductive particles with the larger maximum width are good in conductivity, and electric connection between the first shielding layer and the grounding layer on the circuit board located on the side, away from the first shielding layer, of the first connecting layer is easy to achieve. Therefore, the arrangement of the first conductive particles with different maximum widths can give consideration to both conductivity and offset resistance, so that the electromagnetic shielding case can extend between two adjacent electronic components for shielding, and the shielding effect is ensured.

The invention relates to the technical field of heating film preparation, in particular to a heating film containing carbon nanotubes and a preparation method of the heating film. The modified graphene oxide and the pretreated carbon nanotubes are bonded through chemical bonds by taking a silane coupling agent as a'bridge ', so that an inorganic base material is prepared; the inorganic base material ensures the electrical conductivity, the heat-conducting property and the electromagnetic shielding property under the synergistic cooperation of the carbon nanotubes and the graphene; the pretreated inorganic base material is put into a silver nitrate aqueous solution, an oxalic acid aqueous solution is added, and a considerable amount of nano-silver quantum dots are deposited on the surface of the pretreated inorganic base material after a chemical reaction, so that the conductivity of the inorganic base material is further improved; a three-dimensional conductive network is jointly formed by the conductive polymer, the nano-silver quantum dots, the carbon nanotubes and the graphene, so that the compound conductive agent not only has excellent conductive performance, heat-conducting performance and electromagnetic shielding performance, but also has excellent thermal fatigue resistance and thermal damage resistance, and the quality of the heating film is effectively guaranteed.

The utility model relates to the technical field of signal lines, in particular to a high and low temperature resistant signal line. Comprising an outer coating layer and signal lines. The outer coating layer is a silica gel layer; each signal line is provided with a first conductor, a first insulating layer, a first shielding layer, a second shielding layer and an isolating layer from inside to outside in sequence; the first insulating layer is an FEP plastic layer; the isolating layer is a mylar plastic layer; according to the utility model, silica gel is adopted as the outer coating layer, FEP plastics are adopted as the insulating layers of the signal lines and the signal control lines, so that the cable has better high and low temperature resistance, the temperature can reach-60-200 DEG C, the cable can be used in a harsh environment, and the application range of the cable is further expanded; besides, the isolation layer is arranged, and the isolation layer is made of mylar plastic and is soft and durable, so that the second shielding layer can be effectively prevented from being abraded due to extrusion, the shielding effect of the first shielding layer and the second shielding layer is ensured, and the signal interference resistance of the cable is improved.

The invention relates to a pipeline internal detection system and method based on particle ray detection imaging, and the system comprises a ray source and a plurality of detectors which are circumferentially and uniformly distributed around the ray source at intervals. The plurality of particle scattering rays are formed after a plurality of particle incident rays emitted by the ray source are scattered by the wall of the to-be-detected pipeline during detection. The method has the beneficial effects that the design is reasonable, rapid detection of pipeline wall defects, especially tiny defects, can be realized, the pipeline internal detection precision and defect adaptability are improved, and the technical problem of internal detection of tiny complex defects of the pipeline is solved.

The utility model relates to the technical field of medical treatment, in particular to a radiation shielding device and a boron neutron capture therapy system.The radiation shielding device comprises a first shielding layer used for shielding neutron beam scattering and a second shielding layer which has no shielding effect on neutron beams and is used for shielding gamma rays in the neutron beams. The first shielding layer and the second shielding layer are arranged in an attached mode, the first shielding layer is provided with a beam outlet hole allowing a neutron beam to penetrate through, and the position, corresponding to the beam outlet hole, of the second shielding layer is not provided with the beam outlet hole, so that the second shielding layer is kept complete. Wherein the radiation shielding device can effectively protect normal tissues of a patient from being damaged by scattered neutron beams and gamma rays, and the normal tissues are prevented from being damaged by radiation; the method does not need to adapt to body types of patients, is high in universality and does not need to be customized according to body type differences of the patients, cost is remarkably reduced, and economic burdens of the patients are smaller. And direct contact with a patient is not needed, so that the comfort of the patient is better while the shielding effect is ensured.

The utility model discloses an insulation shielding sheet structure of a backboard connector. The insulation shielding sheet structure comprises an insulation body, a terminal group, a shielding sheet and a cover plate. The shielding sheet is arranged on the upper surface of the insulating body; the matching cover plate is arranged on the insulating body through the matching of the fixing holes and the fixing columns, and is fixedly mounted on the insulating body in a hot melting manner; the cover plate covers the upper surface of the shielding sheet and the peripheral side walls of the shielding sheet, so that the shielding sheet is clamped between the insulation body and the cover plate, the insulation performance of the backboard connector can be effectively improved, and when a plurality of backboard connectors are used together, the plurality of backboard connectors can be arranged in a contact manner, so that the use space of the backboard connector is compressed, and the service life of the backboard connector is prolonged. And the hidden shielding sheet can be prevented from being contacted with the outside in the use process, so that the shielding effect of the backboard connector is ensured, and meanwhile, the hot melting fixing mode can also ensure that the integrity of the overall appearance of the backboard connector is better.

The invention discloses a network layout design method based on Samsung 4nm, and relates to the technical field of semiconductor layout design. Comprising the following steps: selecting two layers of topmetal to construct a power ground network; a power supply layer and a ground layer are overlapped, the power supply layer is connected with a power supply to form a low-impedance power supply network, and the ground layer is grounded to form a low-impedance ground network; uniformly distributed power supply ground voltage stabilizing capacitors are formed between the power supply layer and the ground layer, and the ground layer is connected with a ground network; according to the invention, the two layers of top metal are arranged in an overlapped manner, so that a low-impedance power ground network and a voltage stabilizing capacitor which are uniformly distributed are formed, a low-impedance grounding network is provided, and noise interference is effectively reduced; a power ground network is constructed, low impedance is achieved, a power ground with higher quality is provided, electromagnetic interference is better restrained through a large number of evenly-distributed shielding networks, and the circuit is protected against the influence of external electromagnetic interference.

This invention discloses a filtering device suitable for mobile phone shielding, comprising a connector, a tube, a first conductive element, a second conductive element, and a tubular ceramic capacitor. The connector includes a metal housing and a conductive core disposed within it. The tube is also made of metal, with its front end connected to the rear end of the connector housing. The first conductive element passes through the tube axially from within it, without contacting the tube. The front end of the first conductive element is connected to the conductive core of the connector. The second conductive element is disposed outside the tube, with its front end connected to the connector housing. The tubular ceramic capacitors are connected in series with the first conductive element, with at least one of them sealing the rear end of the tube. The casing of the tubular ceramic capacitor includes a conductive portion connected to the tube. Compared with existing technologies, this filtering device not only performs better in high-frequency filtering and electromagnetic shielding, but its structural design is also simpler and more practical.

A floating shielding cavity for an ultra-low board spacing connector is arranged between a main board and a daughter board which are connected through the connector and comprises a frame body with a solid structure and a shielding cavity defined by the frame body, and the connector needing to be shielded is located in the shielding cavity. The frame body is of a porous structure formed by winding and weaving metal wires, and intersection points of the metal wires are in contact to form a conductive net. According to the utility model, the axial compression capability in the length direction is realized, and the shielding performance reduction caused by elasticity attenuation can be avoided after long-time use, so that high isolation and shielding between low-spacing PCBs and between signals of small connector products become possible.

The invention discloses an electromagnetic shielding cover which comprises an insulating layer, and a shaping piece is arranged in the insulating layer and used for maintaining the shape of the electromagnetic shielding cover when the electromagnetic shielding cover is pressed on a circuit board. According to the invention, the embedding performance of the electromagnetic shielding case in a tiny gap is improved, the conformal capability of the electromagnetic shielding case and the circuit board is improved, and the shielding effect of the electromagnetic shielding case is enhanced.

The utility model discloses a control device of a mobile phone signal shielding device, which relates to the technical field of mobile phone signal shielding and comprises a mobile phone signal shielding device body and a control panel used for controlling the mobile phone signal shielding device body. According to the utility model, the telescopic end of the electric telescopic rod is controlled to stretch out and draw back, so that the rack is driven to move up and down in the box body, and the plurality of guide vanes are driven to swing up and down through the plurality of gears respectively, so that air flow which is formed by the micro fan and is blown to the control panel is guided, and the heat dissipation area of the micro fan to the control panel is increased; meanwhile, the inner wall of the mobile phone signal shielding device body is cooled, so that the cooling effect of the micro fan on the control panel is improved, it is ensured that the control panel is not prone to being heated and damaged in the process of controlling the mobile phone signal shielding device body, and then long-time normal use of the mobile phone signal shielding device body is ensured; therefore, the shielding effect of the mobile phone signal shielding device body on mobile phone signals is ensured.

The utility model belongs to the technical field of electric connection, and particularly relates to a shielding connector, which comprises a shielding shell, a plug shell, a cable, a jack terminal, a seat body provided with a first through hole and a shielding compression ring sleeved on the cable, the plug housing is provided with a second through hole and an annular through hole communicated with the second through hole. The shielding shell comprises a first sleeve and a second sleeve connected with the first sleeve. The end, away from the first sleeve, of the second sleeve is provided with an annular flange. The plug shell is inserted into the first through hole, and an annular space communicated with the annular through hole is arranged between the plug shell and the seat body; the first sleeve is inserted into the second through hole. The shielding pressing ring is inserted into the first sleeve and abuts against the inner wall of the first sleeve. The second sleeve is inserted into the annular through hole, and the annular flange is located in the annular space and abuts against the shielding shell. The jack terminal is installed in the second through hole and is electrically connected with the cable. The shielding connector has good shielding effect and waterproof effect.

The utility model relates to the technical field of control cables, in particular to an environment-friendly high-flame-retardant shielding control cable for special instruments, which comprises a plurality of mutually twisted control wire cores. The plurality of flame-retardant filling strips are filled in gaps among the control wire cores and are wrapped and fixed by a flame-retardant belt to form a cable core with a circular cross section; the outer wall of the cable core is coated with the composite shielding layer; and the outer sheath is extruded on the outer wall of the composite shielding layer. Through the combination of the copper strip shielding layer and the copper wire shielding layer in the composite shielding layer, respective advantages can be exerted on different frequency bands, a comprehensive shielding effect is provided, meanwhile, the elastic deformation space is increased by utilizing the convex structure of the copper strip, the overall flexibility of the cable is high, wiring in frequent bending and narrow space is facilitated, and the cable has a wide application prospect. And meanwhile, the aramid fiber braid layer is utilized to buffer and protect the copper wire braid layer, so that the probability that the copper wires are broken under the action of compression / tensile stress of the cable can be reduced, and the shielding performance of the cable is maintained.

The utility model discloses a wave recording device for recording faults of an electric power system, which comprises a shielding case, an equipment shell is fixedly connected to the outer side of the shielding case, a linkage mechanism is rotatably connected to the equipment shell through a hinge, the linkage mechanism comprises a protection plate, T-shaped plates are fixedly connected to the two ends of the protection plate, and the T-shaped plates are fixedly connected to the two ends of the protection plate. A handle is fixedly connected to the T-shaped plate, a switch button is arranged on the handle, and a hydraulic rod is rotationally connected to the other side of the T-shaped plate. Through the equipment, interference signals generated by external electronic equipment, power lines and other electromagnetic sources can be reduced, the influence on the performance and data quality of the wave recording device is avoided, the accuracy and reliability of the wave recording device are ensured, and under the cooperation of the fixing mechanism and the linkage mechanism, the operation of replacing the internal wave recording instrument is simple, and the working efficiency is improved. And the wire harnesses can be quickly plugged and arranged, so that the wire harnesses are prevented from being wound and the workload is reduced.

The application discloses a preparation method of superfine denier electromagnetic shielding functional chinlon and a product thereof. The chinlon is prepared by mixing 2-7% electromagnetic shielding functional chinlon master batch containing Fe3O4 nanoparticles and 93-98% pure chinlon chips, and then performing drying, melt extrusion, spinning cooling, oiling treatment, drafting setting and winding silk collection. In the preparation process, key parameters such as spinning temperature, filter mesh size, cooling parameter and drafting multiple are optimized, so that the problems of superfine denier fiber spinning breakage, product adhesion and uneven dispersion under high master batch content are solved. The chinlon monofilament fineness obtained by the application is 0.2-0.5 dtex, the breaking strength is greater than or equal to 3.0 cN / dtex, the electromagnetic shielding effectiveness reaches 40 dB in a frequency range of 2000 MHz, the thermal stability is better than that of pure chinlon, and the application is suitable for high-end application scenes such as high-grade clothes, home textiles, electronic protection and filtering materials.

The present invention discloses a radiation-proof curing agent and building materials, wherein the radiation-proof curing agent comprises the following raw materials: 220 to 400 parts of water, 90 to 255 parts of sodium silicate, 10 to 55 parts of sodium hydroxide, 0 to 300 parts of electromagnetic radiation shielding materials, and 0 to 300 parts of neutron shielding materials. The present invention comprehensively utilizes materials such as ilmenite, barite, polyethylene, and boron carbide, and evenly mixes the finely ground radiation shielding materials, activators, and soil materials to form radiation-proof building materials that take into account strength, density, and radiation protection capabilities. The present invention can save construction costs in strong radiation environments such as lunar bases while ensuring that personnel and equipment on the lunar surface are protected from radiation hazards.

The utility model discloses an acoustic test noise shielding box, which comprises a box body, a box door rotatably mounted on the surface of the box body through hinges, a flash lamp mounted on one side of the top end of the box body, a base arranged at the bottom of the box body, a sound insulation gasket arranged on the inner wall of the box body, a guide rail arranged at the top end of the base, and a rail seat slidably connected to one side of the top of the guide rail. A linkage plate is arranged at the top end of the rail seat, a linkage seat is arranged on one side of the top end of the linkage plate, a bearing plate is arranged at the top end of the linkage seat, a base is arranged in the center of the top end of the bearing plate, side supporting frames are arranged on the two sides of the top end of the base, and a top seat is arranged at the top end of each side supporting frame. And one end of the first telescopic driving piece is connected with the outer wall of the linkage seat. According to the utility model, not only is the convenience of the shielding box in use improved, but also the test efficiency of the shielding box on products in use is improved, and the shielding effect of the shielding box on a sound source in use is ensured.

The utility model discloses automatic production equipment for a transportation container, which comprises a lead smoke purification system, a lead melting system, a lead filling system and a control assembly, the lead melting system is arranged between the lead smoke purification system and the lead filling system, one end of the lead melting system is connected with the lead smoke purification system, and the other end of the lead melting system is connected with the transportation container. The lead filling system is arranged at the top of the transportation container, and the lead smoke purification system, the lead melting system and the lead filling system are electrically connected with the control assembly.

A shielding piece with a counterbore comprises a covering top surface and a side edge which is formed by bending and extending downwards from the periphery of the covering top surface, and the covering top surface is stretched downwards to form the counterbore. The counterbore comprises a stretching inclined wall which is formed by downward inclined stretching from the covering top surface and a bonding pad which is formed by flattening and extending from the bottom end of the stretching inclined wall. The shielding piece can achieve the purposes of avoiding an object and ensuring the shielding performance without independently arranging a supporting column, and the manufacturing cost can be reduced.

The invention provides an unmanned aerial vehicle body electromagnetic shielding evaluation method, which belongs to the technical field of unmanned aerial vehicle electromagnetic shielding, and comprises the following steps: constructing a shielding attenuation calculation model according to the thickness and relative conductivity of a shielding structure, and analyzing the attenuation of electromagnetic shielding of materials with different thicknesses; the material thickness of the unmanned aerial vehicle fuselage shielding structure is adjusted according to the attenuation analysis result; an energy self-adaptive surface is constructed, a periodic grid structure is constructed to realize selective shielding of incident waves, and selective shielding effects of different materials are analyzed; and shielding the effect according to the selectivity. The method has the advantages that the content of high-frequency electromagnetic waves is concerned and focused on screening of shielding objects in the use environment of the unmanned aerial vehicle, the shielding effect of the electromagnetic shielding mechanism of the unmanned aerial vehicle for each frequency domain can be accurately judged through frequency domain shielding effect evaluation, optimization for weak frequency domains is facilitated, and a frequency domain optimization direction is provided.

The utility model discloses a conductive wire mesh based on a non-metal base material, which belongs to the technical field of conductive materials and comprises a wire mesh structure formed by weaving non-metal wires, the non-metal wires are made of carbon fibers, and a conductive layer is arranged on the surface of the wire mesh structure. According to the conductive wire mesh based on the non-metal base material provided by the utility model, the carbon fiber wire mesh structure is compounded with the conductive layer, so that the conductive wire mesh has the advantages that the surface is smoother and not easy to deform while excellent conductivity and electromagnetic shielding performance are obtained.

The application relates to the technical field of residual magnetism detection, and particularly relates to an array type magnetic flux gate arrangement tool which is arranged in a cylindrical magnetic shielding cylinder and comprises a base, a guide rail and a residual magnetism detection component. The base is arranged in the magnetic shielding cylinder and is in contact with the inner wall of the magnetic shielding cylinder, is used for bearing the tool, has two contact parts which are in close contact with the inner wall of the magnetic shielding cylinder, and a main body part is arranged between the two contact parts. The guide rail is arranged on the base and is fixedly connected with the base. The residual magnetism detection component is arranged on the guide rail and cooperates with the guide rail, a plurality of magnetic flux gates are arranged on the residual magnetism detection component, and the residual magnetism of a material to be detected is detected. The application provides a magnetic flux gate arrangement tool which is specially arranged in the magnetic shielding cylinder, the position of a plurality of magnetic flux gates can be synchronously adjusted, the consistency of the positions of the magnetic flux gates before and after adjustment is ensured, and the residual magnetism gradient of the material to be detected can be conveniently detected.

The application discloses a wide-band FSIW-like dual-band filter, which comprises a top metal layer, a middle metal layer, a bottom metal layer, a dielectric layer, a first array of metallized through holes, a second array of metallized through holes, a third array of metallized through holes and an input / output port. The first and second modes of the FSIW-like rectangular cavity are used to construct the first and second passbands of the filter respectively. The width of the rectangular gap at the folding position of the FSIW-like rectangular cavity is changed, so that the resonant frequency of the second mode can be adjusted, and the resonant frequencies of the first and third modes are not changed, thereby effectively improving the stopband bandwidth of the dual-band filter while the frequency of the second passband is independently adjustable.

The utility model provides a graphene composite shielding layer which comprises an installation substrate, an installation groove is arranged on the upper surface of the installation substrate, a partition plate is arranged in the installation groove, a graphene shielding net is arranged on the surface of the partition plate, a heat conduction structure is arranged on the side portion of the installation groove, and a protection cover is arranged on the top of the installation groove. The protecting cover is in contact with the heat conducting structure; by means of the detachable partition plates and the graphene shielding nets, different layers of graphene shielding nets can be installed according to actual requirements, so that the shielding effect is ensured, heat generated by the electronic component can be rapidly transmitted to the outside through the heat conduction structure, and therefore stable operation of the electronic component is ensured.

The utility model belongs to the technical field of electromagnetic shielding, and particularly relates to an electromagnetic shielding door which comprises a shielding door frame, a shielding door leaf and an electromagnetic shielding effectiveness monitor. The electromagnetic shielding effectiveness monitor comprises a transmitting device and a receiving device, the transmitting device is embedded in the inner side of a shielding door leaf, the receiving device is embedded in the outer side of the shielding door leaf, and a clamping frame connected with the transmitting device and the receiving device is fixed in the shielding door leaf. The transmitting device and the receiving device are fixedly connected with the corresponding clamping frames through first bolts respectively; the outer end of the transmitting device and the outer end of the receiving device are each provided with a sealing strip sealed with a door leaf of the shielding door. The shielding effectiveness of the electromagnetic shielding door can be monitored online in real time, so that the shielding door can be rectified or replaced in time when the shielding effectiveness of the shielding door is reduced, and electromagnetic leakage of sensitive information in a machine room is avoided.

The waveguide microstrip conversion device comprises a waveguide, one end of a cavity of the waveguide is connected with a microstrip structure in an inserted mode, the microstrip structure comprises a dielectric substrate, a microstrip line and a microstrip circuit board, the microstrip line is arranged on the dielectric substrate, the dielectric substrate is connected with the microstrip circuit board, the dielectric substrate is connected in the waveguide in an inserted mode, and the microstrip circuit board is connected with the waveguide. A shielding plate is further arranged on one side of the waveguide, the microstrip structure penetrates through the shielding plate, an outer circuit board is further arranged on one side of the shielding plate, the outer circuit board is connected with a microstrip circuit board, and a radio frequency connector is connected to the microstrip circuit board. The waveguide and the micro-strip are ingeniously integrated, and the connecting contacts are arranged on the side surface of the micro-strip circuit board and are electrically connected with the external circuit board, so that the occupied space of the circuit board is greatly reduced, and the overall size is reduced; by arranging the shielding plate at one end of the waveguide where the microstrip structure is located, electromagnetic leakage caused by installation of the microstrip is greatly reduced, and the shielding effect of the end is ensured; and the choking coil is arranged to suppress the influence of surface waves and improve the gain.

This invention discloses a method for preparing a high-density patch inductor blank, relating to the field of patch power inductors. In the prefabrication process, the patch inductor blank undergoes a first-stage pressing and a second-stage pressing. During the first-stage pressing, the current positions of the upper die head and the second lower die head are kept constant. The first lower die head is activated and controlled to press upwards at a first preset pressure. When the powder height on the periphery of the cavity is higher than a preset dimension of powder height at the center of the cavity, the second-stage pressing begins. During the second-stage pressing, the first lower die head continues to press at the first preset pressure, while the upper die head and the second lower die head are activated and controlled to press downwards and upwards respectively at a second preset pressure. When the powder height on the periphery of the cavity is equal to the powder height at the center of the cavity, the pressing pressure of the first lower die head is adjusted to the second preset pressure and held, resulting in a patch inductor blank. This method significantly improves the compaction density and permeability of the inductor blank.

The utility model provides a baffle structure of an air conditioner outdoor unit, which relates to the technology of electrical equipment and comprises a baffle main body, and the baffle main body is provided with a plurality of first mounting holes fixedly connected with a bottom plate and a front plate of the air conditioner outdoor unit respectively. The lower end of the baffle body is further provided with a clamping hook used for being clamped and matched with a flanging of a bottom plate of the outdoor unit of the air conditioner. The baffle main body is provided with at least one reinforcing rib, the baffle main body can replace a shielding part formed by a traditional condenser assembly, the structure is simple, the cost is low, the reinforcing ribs are integrally arranged, the supporting strength of the baffle main body can be further improved, and the overall strength of the air conditioner outdoor unit is further improved.

The invention provides a three-seat forming machine. The controller is used for receiving speed signals sent by the first photoelectric sensor, the second photoelectric sensor and the third photoelectric sensor and controlling the lining core conveying assembly. Rotating speeds of the semi-finished product conveying assembly and the shielding material semi-finished product conveying assembly enable the conveying speed of the lining core conveying assembly for conveying the lining core into the second forming machine and / or the conveying speed of the shielding material semi-finished product conveying assembly for conveying the shielding material semi-finished product to the output end of the third forming machine to be larger than half of the conveying speed of the lining core conveying assembly for conveying the lining core into the second forming machine and / or the conveying speed of the shielding material semi-finished product to the output end of the third forming machine. The finished product conveying assembly conveys the semi-finished products to a conveying speed in a third forming machine; the conveying speeds of all layers of materials of the foam electromagnetic shielding material semi-finished product are matched through automation, the stability of the conveying speeds of all layers of materials of the foam electromagnetic shielding material semi-finished product is improved, the problems of bending deformation of all layers of materials, reduction of the attaching precision of all layers of materials and the like are effectively avoided, and the production efficiency is improved.