31results about How to "Does not compromise structural integrity" patented technology

The invention discloses a novel method for modifying graphene with polymer. By introducing polydopamine and combining covalent modification with non-covalent modification, the method increases the stability of the modified product structure under the premise of ensuring the integrity of the graphene structure. Firstly, by utilizing the strong adhesion of dopamine, the dopamine is self-polymerized to form a film on the surface of a graphene sheet, moreover, 2-Bromo-2-methylpropionyl bromide (BiBB) as common initiator for atom transfer radical polymerization (ATRP) is grafted on the dopamine by amidation, at the same time, graphene oxide (GO) is partially reduced by the dopamine (DA), and thereby graphene macroinitiator RGO@PDA-Br is obtained. Polymeric monomer is then added, so that the ATRP of the polymeric monomer is initiated on the surface of the graphene, and thereby a polymer-modified graphene material is obtained. By controlling conditions such as monomer concentration and reaction time, the novel method can obtain modified graphene materials with different densities and chain lengths of polymer grafted on the surfaces, meeting the characteristics of controllable / living ATRP. In addition, the feasibility and universality of the novel method for modifying graphene with polymer put forward by the invention are applicable to various monomers suitable for ATRP.

The invention discloses a preparation method for a graphene reinforced magnesium matrix composite material. The preparation method comprises the following steps that magnesium powder is dissolved in ethanol, mechanical stirring and ultrasonic dispersion are conducted, and a magnesium alloy solution is obtained; graphene is added into the ethanol, ultrasonic mixing is conducted, and a graphene dispersion solution is obtained; the graphene dispersion solution is added into the magnesium alloy solution drop by drop, ultrasonic dispersion and mechanical stirring are conducted, and a graphene magnesium alloy dispersion solution is obtained; the graphene magnesium alloy dispersion solution is placed in a low-temperature water bath kettle to be heated; after the solution evaporates to be liquid seal pulp, heating is stopped, the pulp is taken out to be subjected to vacuum ball milling, vacuum pumping is conducted after standing, then high-purity argon is pumped in, and ball milling is conducted; a ball-milled mixture is taken out, subjected to vacuum drying and put into a vacuum glove box to be subjected to manual dispersion grinding; and composite powder is put into a sintering furnace to be sintered. The technological process is simple, practicability is wide, and the graphene reinforced magnesium matrix composite material has wide military and aviation application prospects.

The invention provides a medical image data generation method and device for artificial neural network training, and the method comprises the steps: building the corresponding relation between the target features of a basic medical image and the image features of an extended image through the self-learning capability of an artificial neural network; wherein the image features comprise texture features and content features; obtaining a current target feature of the current basic medical image; determining an image feature of a current extended image corresponding to the current target feature through the corresponding relationship; specifically, the method determines the image features of the current extended image corresponding to the target features, and comprises the steps: determining the image features of the extended image corresponding to the target features, which are the same as the current target features, in the corresponding relation as the image features of the current extended image, thereby improving the rationality of the generated extended image; details are restored more excellently, and the diversity of features is improved.

The invention discloses a preparation method of a fibroin fluorescent probe. The method comprises the following steps: screening a phage library by using a fibroin material to obtain a phage specifically bonded with fibroin proteins; carrying out gene sequencing; using an amino acid sequence corresponding to the gene obtained by sequencing as a fibroin affinity peptide primary sequence; carrying out polypeptide synthesis on the fibroin affinity peptide primary sequence by adopting a polypeptide synthesis technology to obtain fibroin affinity peptide powder; and bonding the fibroin affinity peptide powder with fluorescein to obtain a fibroin fluorescent probe. The phage screened by the invention has very high affinity to the fibroin material, is high in probe sensitivity, high in detection speed and wide in application prospect, and provides more choices for high-efficient targeting and identification of the fibroin protein and the fibroin material.

The invention provides a flaky acoustic black hole energy harvester set device which comprises a plurality of acoustic black hole energy harvesters and an energy harvester set lower bottom face sealing plate. The multiple acoustic black hole energy harvesters are sequentially connected in an attached mode and fastened with the energy harvester set lower bottom face sealing plate. The flaky acoustic black hole energy harvester set device has lots of adjustable parameters, has the good vibration reduction effect and is suitable for solving the problem of low-frequency vibration, the covering frequency range is wide, and the defects of low structural strength and weak bearing performance of traditional acoustic back holes are overcome. In vibration reduction application, the multiple energy harvester set devices can be arranged in a flat laid mode, and the acoustic black hole energy harvesters with the different structural sizes and parameters can be combined at will; the functions of devouring and capturing of vibration of the designated frequency band are conducted on the basis of not destroying the structural integrity and not reducing the structural strength and safety; designingcontrol over low-frequency vibration, medium-frequency vibration and high-frequency vibration can be achieved through the flaky acoustic black hole energy harvester set device; and the acoustic blackhole energy harvesters are small in additional mass, the implementing method is simple and flexible, and the acoustic black hole energy harvesters can be combined at will to adjust the energy absorption efficiency.

The invention provides a metal loaded activated carbon modified silk protein porous membrane and preparation and application methods thereof. The metal loaded activated carbon modified silk protein porous membrane is composed of silk protein and loofah sponge sheet-like activated carbon materials loaded with gold, platinum, palladium, titanium, iron, manganese or cerium. The preparation process ofthe metal loaded activated carbon modified silk protein porous membrane comprises processing the peripheral fiber of loofah sponge into sheets, performing pretreatment through dilute alkali, and thoroughly immersing the raw materials into sugar alcohol solution containing metal salt; inletting nitrogen into the solution to form tiny bubble clusters, performing immersion treatment, extracting andthen squeezing the materials to remove superfluous sugar alcohol solution, and performing drying, curing and high-temperature carbonization treatment to obtain loofah sponge sheet-like activated carbon materials; mixing the loofah sponge sheet-like activated carbon materials with the silk protein solution; performing electrophoresis treatment to obtain hydrogel, freeze-drying the hydrogel in vacuum to obtain the metal loaded activated carbon modified silk protein porous membrane. The prepared metal loaded activated carbon modified silk protein porous membrane achieves absorption, oxidation catalysis and protein immobilization, and is significant in processing effects and free from the potential risk of secondary pollution.

The invention provides a transformer digital self-adaptive protection device and method based on pressure features. The device comprises a transient oil pressure feature quantity measuring module, a switching quantity input module, a signal modulation and collection module and a digital core module, wherein the transient oil pressure feature quantity measuring module is connected with the signal modulation and collection module; and the signal modulation and collection module and the switching quantity input module are connected with the digital core module. The transient oil pressure digitalinformation of a plurality of measuring points inside an oil tank is obtained in real time; an action pressure value representing the oil pressure amplitude is obtained through operation; a protectioncriterion and threshold value setting method is built by using the obvious differences of the feature quantity under different operation conditions of a transformer; the reliable fast and sensitive discrimination and elimination of faults inside the oil tank of the transformer can be realized; and no influence is caused by excitation inrush current. Meanwhile, the fault state self-adaptive and threshold value self-adaptive protection scheme is designed so as to accelerate the protection action speed.

The invention relates to the technical field of metal-based composite materials, and particularly discloses a boron-doped graphene reinforced copper-based composite material and a preparation method thereof. According to the copper-based composite material, the boron-doped graphene serves as a reinforcement body, the bonding interface of copper and graphene is effectively increased, interface electron transmission is improved, boron doping is carried out on a complete graphene sheet layer, the structural integrity of the graphene is basically not damaged, the electron transmission performance of the boron-doped graphene is better, meanwhile, a Cu-B-C bond can be formed between the graphene and a copper substrate, and interface bonding and electron transmission are both considered. According to the preparation method, processes such as graphene doping, mixing of a copper raw material and a reinforcement body and heat treatment are combined, and the copper-based composite material with uniformly distributed boron-doped graphene is successfully prepared, experiments prove that the tensile strength of the boron-doped graphene reinforced copper-based composite material is not lower than 308.6 MPa, and the conductivity of the boron-doped graphene reinforced copper-based composite material is not lower than 90.6% IACS.

The invention discloses an interactive teaching device for English teaching, and the device structurally comprises a placement groove frame, a sound production module, a data strip, a recognition pen, and a display, so that when the device is used, through the arrangement of a placement groove frame mechanism, the problems can be avoided that a book easily slides on a desktop when the book is placed, and when a recognition pen scans and recognizes a book or during page turning, one end of the book needs to be pressed by a hand or a tool, and inconvenience is caused. A book side edge pressing area is clamped through a movable clamping block device, the book side edge pressing area is not prone to generating redundant sliding on a groove plate, and meanwhile, when the book is browsed and learned, the book pages slide in along the clamping plate device, and at the moment, the book pages are fixed in an auxiliary manner through mutual matching of the insert block device and the clamping plate device, so that the structural integrity of the book pages is not damaged while the book pages are prevented from being directly reset and closed, and more convenience is achieved.

The invention relates to a fiber winding pressure container with an on-line monitoring function and a manufacturing process thereof. The fiber winding pressure container comprises a liner, and the liner surface is provided with a fiber composite winding layer provided with a conductive sensing network for collecting electrical signals. The manufacturing process comprises the steps that a conductive nano material is added to a volatile solvent and stirred to prepare a conductive nanometer solution; a metal template is placed on the surface of the fiber composite winding layer to be wound on the outer layer of the liner; the conductive nanometer solution is sprayed on the fiber composite winding layer through the metal template; and the fiber composite winding layer is heated, so that the volatile solvent is completely evaporated, and the conductive sensing network is formed on the surface of the fiber composite winding layer. Compared with the prior art, the fiber winding pressure container has the advantages of being simple, reliable, capable of achieving on-line monitoring and the like.

The invention relates to the technical field of water stop structures between new and old concrete, in particular to a water stop mounting structure between new and old concrete and a mounting method. The structure comprises an old concrete part and a new concrete part poured on the old concrete part, and further comprises a red copper sheet water stop. The red copper sheet water stop comprises a horizontal part tightly fixed to the surface of the old concrete part through an anchoring structure and a vertical part fixed to the horizontal part and arranged in the vertical direction, the horizontal part and the vertical part form an L-shaped structure, one part of the L-shaped structure is located in the old concrete part, and the other part of the L-shaped structure enters the new concrete part in the direction perpendicular to water flow, the horizontal part is positioned on the downstream side of the vertical part; and the anchoring structure fixes the horizontal part on the surface of the old concrete through a bolt. The structure is simple, the installation and construction method is extremely convenient, damage to an old concrete part can be avoided, the service life of the red copper sheet water stop is prolonged, and great popularization value is achieved.

A mullion connection system for resisting wind load reactions using a connection clip structurally engaged with a mullion without a hole or a fastener penetrating into the mullion surface. The connection clip can undergo stress-free vertical sliding relative to the mullion along the entire length of the mullion without impairing the structural connection strength; therefore, the building construction tolerance in the vertical direction is eliminated as a design consideration of the curtain wall system. The design also eliminates the need for pre-fabricating mullion holes for the connection locations. The design does not require the pre-determination of the elevation of the connecting point and thus is most beneficial for a curtain wall renovation project where the available locations in the building structure for structural connection cannot be determined prior to the demolition of the existing wall. The uninterrupted mullion tube cavities can be conveniently utilized for inter-floor distribution of utility lines.

The invention provides a near-field communication antenna device, which belongs to the field of wireless communication. The antenna device is an antenna device formed in a mobile electronic device, including: a shell conductor layer, an insulating layer, a coil conductor, a flexible substrate and a magnetic material layer; The other side of the flexible substrate to which it is attached is equipped with a magnetic material; the shell conductor layer divides the shielding of the coil conductor into two areas: the first area is the non-shell conductor layer shielding part, that is, the actual magnetic link coupling part of the antenna. The area is covered with magnetic materials to improve the magnetic field radiation capability of the antenna; the second area is the shielding part of the shell conductor layer, which is not covered with magnetic materials to reduce the ohmic loss of the antenna caused by the loss of magnetic materials and reduce the The magnetic field density in the area is improved, while reducing the eddy current loss caused by the conductor layer, and improving the reading and writing distance of the antenna device.

The invention provides a roof and gable joint, and relates to the technical field of buildings. The roof and gable joint is used for connecting a roof and a gable, the roof and gable joint cannot damage the structural integrity of the roof, and can ensure a waterproof effect of the roof, the roof comprises a roof plate, the gable comprises a flashing plate, the roof and gable joint mainly comprises a mounting assembly and a fixing assembly which are connected with each other, and the roof plate is mounted on a rooftop through the fixing assembly, so that the free end of the roof plate is fixed, and it is ensured that the roof has the good waterproof effect. According to the roof and gable joint, the fixing assembly can provide a fixing position and an installation supporting platform for the roof and gable joint, the flashing plate is installed on the mounting assembly, the mounting assembly is fixed to the rooftop and abuts against the fixing assembly, the mounting assembly can provide an installation fixing platform for the flashing plate, damage to the roof plate possibly caused by direct connection of the flashing plate and the roof plate is avoided, through the connection of the mounting assembly and the fixing assembly, the roof plate and the flashing plate are connected and fixed, and then the roof and the gable are connected with each other.

The invention relates to a high-strength film-coated sand core for sand casting, a manufacturing machine and a manufacturing process. The core includes a core body, a core bone body, reinforcements, connectors and connecting bolts. A special The manufacturing machine includes a feeding mechanism, a crushing mechanism and a shell, and the feeding mechanism and the crushing mechanism are installed in the shell. The method for making the above-mentioned mold core by using the above-mentioned making machine includes the following steps: coated sand manufacturing, core box manufacturing Core, core trimming and core inspection. The present invention provides a high-strength film-coated sand core for sand casting. The various parts of the mandrel are connected in a detachable manner. After the mandrel is disassembled, the mandrel can be taken out from a narrow space without damage. The structural integrity of the core bone can be realized multiple times.

A transformer digital adaptive protection device and method based on pressure characteristics, including: a transient oil pressure characteristic quantity measurement module, a switch input module, a signal conditioning and acquisition module, and a digital core module; wherein, the transient oil pressure characteristic quantity The measurement module is connected with the signal conditioning and acquisition module, and the signal conditioning and acquisition module and the digital input module are all connected with the digital core module. The invention obtains the digital information of transient oil pressure at multiple measuring points inside the oil tank in real time, calculates and obtains the action pressure value representing the oil pressure range, and utilizes the significant difference of the characteristic quantity under different operating conditions of the transformer to construct the protection criterion and the threshold value setting method , to realize reliable, rapid and sensitive screening and removal of internal faults in the transformer oil tank, and is not affected by the excitation inrush current. At the same time, the present invention designs a fault state self-adaptation and threshold value self-adaptation protection scheme to improve the action speed of protection.

The invention discloses a full-bearing-type pure electric business purpose vehicle structure which comprises a full-stamping part front wall, a full-stamping part top cover, a rectangular pipe side wall, a full-stamping part back wall and a truss type chassis assembly. The full-stamping part front wall and full-stamping part back wall skeletons are connected into a whole through the full-stampingpart top cover arranged at the upper portion, rectangular pipe side wall vehicle bodies arranged at the two sides and a truss type chassis assembly arranged at the lower portion to form a whole vehicle box type skeleton vehicle body assembly. The structure has the beneficial effects that compared with a semi-bearing vehicle body, the whole strength of the full-bearing vehicle body is higher; the full-stamping part vehicle body structure is low in mass and good in strength; a chassis front section, a chassis middle section, a chassis back section and a chassis tail section on the truss type chassis assembly are manufactured at the same time, after the sections of the chassis are spliced, the sections and the side walls are welded and fixed to form the whole vehicle body skeleton, and the problems that installation is difficult and the precision is not high due to the buckling procedure are avoided. According to the business purpose vehicle structure, no bin door needs to be formed in the side walls, and the vehicle body structure integrity is not damaged.

An airloop wall system with durable water-tightness performance is disclosed. The system comprises a base anchor member secured to a top surface of a first floor slab, a base track connected to the base anchor, a base flashing for repelling moisture, a first ceiling anchor member secured to a bottom surface of the first floor slab, a first ceiling track connected to the first ceiling anchor member, a slab edge panel attached to the base track and the first ceiling track, a second ceiling anchor member secured to a bottom surface of a second floor slab, a second ceiling track connected to the second ceiling anchor member, a panel sill frame attached to the base track, a panel head frame attached to the second ceiling track, two jamb frames, and a panel secured between the frames. Corners of the frames are miter-matched such that air spaces inside form an airloop.

The invention relates to the technical field of door and window hardware, and discloses a sash body and a wiring method of the sash body. The fan body comprises a sash frame, an electric appliance assembly, a wire and a cover plate assembly; a wiring groove is formed in the surface of the section material of the sash frame, the electric appliance assembly is arranged on the sash frame, the wire isarranged in the wiring groove, one end of the wire is connected with the electric appliance assembly so as to transmit electric energy and / or control signals to the electric appliance assembly, and the cover plate assembly is detachably connected to the sash frame and covers the wire. The wiring method of the sash body comprises the steps that S1, the wire is arranged in the wiring groove of thesash frame, so that the wire is connected with the electric appliance assembly; and S2, the cover plate assembly is detachably installed on the sash frame, and meanwhile the cover plate assembly covers the wire. According to the sash body and the wiring method of the sash body, the wire is arranged in the wiring groove on the surface of the section material of the sash frame to replace an existinghidden wiring mode; the wire arrangement operation is convenient, the cover plate assembly is detachably installed on the sash frame, meanwhile, the cover plate assembly covers the wire, the wire isfixed and protected, and installation of the cover plate assembly and subsequent maintenance of the wire are facilitated.

The invention discloses a switching piece for fibrous vitrolite dry hanging and a fibrous vitrolite dry hanging method. Each switching piece comprises a first groove body and a second groove body of which the two groove openings are in opposite direction and the cross sections are U-shaped, wherein a groove wall on one side of the first groove body serves as a groove wall on one side of the second groove body. The dry hanging method comprises the following steps: grooving is performed on the two ends of the bonding layer of a fibrous vitrolite, the two ends of the inner layer plate of the fibrous vitrolite are both inserted into the first groove body of one switching piece, a gap between the first groove body and the inner layer plate and a gap between the first groove body and the outer layer are filled with fixing glue, the second groove bodies of two switching pieces are filled with fixing glue so as to be respectively and fixedly provided with insertion parts of corresponding hanging pieces, and the two groove bodies are fixedly connected with a keel system through fixing parts of all hanging pieces, so as to achieve vibrous vitrolite dry hanging. The switching piece provided by the invention is firm and durable, mechanical force is mainly used for achieving dry hanging of the vibrous vitrolite, and after dry hanging, the vibrous vitrolite has a good loaded property and is less susceptible to dropping off. The switching piece provided by the invention can achieve flatness adjustment of the vibrous vitrolite, and the the attractive appearance of the vibrous vitrolite is ensured.

The invention discloses a slow-release exosome composite material and its preparation method and application, which is characterized in that exosomes are chemically linked to biological The stent material serves the purpose of long-term stable and slow release. The preparation method includes the preparation of the scaffold material, the acquisition of the exosome suspension, and the loading of the exosome. The composite scaffold avoids damage to the body caused by chemical cross-linking agent residues. The loading process will not affect the biological activity of exosomes, and will not damage the structural integrity of the exosome membrane. It lays the foundation for the guarantee of the therapeutic effect of exosomes and can be released slowly. Exosomes prolong the action time in the body and provide long-term effective treatment for cases that cannot be transplanted repeatedly.

A mullion connection system for resisting wind load reactions using a connection clip structurally engaged with a mullion without a hole or a fastener penetrating into the mullion surface. The connection clip can undergo stress-free vertical sliding relative to the mullion along the entire length of the mullion without impairing the structural connection strength; therefore, the building construction tolerance in the vertical direction is eliminated as a design consideration of the curtain wall system. The design also eliminates the need for pre-fabricating mullion holes for the connection locations. The design does not require the pre-determination of the elevation of the connecting point and thus is most beneficial for a curtain wall renovation project where the available locations in the building structure for structural connection cannot be determined prior to the demolition of the existing wall. The uninterrupted mullion tube cavities can be conveniently utilized for inter-floor distribution of utility lines.

The invention discloses a hollow wood-plastic plate with a sealing head structure. One or two ends of the hollow wood-plastic plate is / are provided with a mounting surface / mounting surfaces, sealing head plates and the mounting surfaces are connected through a plurality of air row nails, glue is pasted between the sealing head plates and the mounting surfaces, and each sealing head plate is formedby cutting a whole wood-plastic plate the same as the hollow wood-plastic plate in material. By means of the hollow wood-plastic plate, one or two ends of the wood-plastic plate can be sealed with the sealing head plates as required, the connection strength of the hollow wood-plastic plate and the sealing head plates is large, the sealing head plates are not prone to falling off, and the servicelife is long. The sealing head plates do not damage the structural integrity of the hollow wood-plastic plate and do not affect the appearance of the hollow wood-plastic plate.

The invention discloses a preparation method of a fibroin fluorescent probe. The method comprises the following steps: screening a phage library by using a fibroin material to obtain a phage specifically bonded with fibroin proteins; carrying out gene sequencing; using an amino acid sequence corresponding to the gene obtained by sequencing as a fibroin affinity peptide primary sequence; carrying out polypeptide synthesis on the fibroin affinity peptide primary sequence by adopting a polypeptide synthesis technology to obtain fibroin affinity peptide powder; and bonding the fibroin affinity peptide powder with fluorescein to obtain a fibroin fluorescent probe. The phage screened by the invention has very high affinity to the fibroin material, is high in probe sensitivity, high in detection speed and wide in application prospect, and provides more choices for high-efficient targeting and identification of the fibroin protein and the fibroin material.

The invention provides a sheet-shaped acoustic black hole energy harvester group device, comprising a plurality of acoustic black hole energy harvesters and a lower bottom sealing plate of the energy harvester group, and a plurality of acoustic black hole energy harvesters are sequentially bonded and connected; a plurality of acoustic black hole energy harvesters The black hole energy harvester is firmly connected with the lower bottom sealing plate of the energy harvester group. The invention can adjust many parameters, has good vibration reduction effect, is suitable for solving the problem of low-frequency vibration, covers a wide frequency range, and overcomes the shortcomings of low structural strength and weak bearing capacity of the traditional acoustic black hole. In the application of vibration reduction, multiple energy harvester group devices can be arranged in a tiled manner, and acoustic black hole energy harvesters with different structural size parameters can be combined arbitrarily. On the basis of not destroying the integrity of the structure and reducing the safety of the structure, the "swallowing and capturing" function of vibrating in the specified frequency band has been realized. The invention can realize designable control of low-frequency, medium-frequency and high-frequency vibrations. The additional mass of the acoustic black hole energy harvester is small, the realization method is simple and flexible, and the energy absorption efficiency can be adjusted in any combination.

The invention belongs to the related technical field of laser processing and preparation of circuits, and discloses a multi-layer structure with an internal embedded circuit and a non-contact laser processing method thereof. The method comprises the following steps that (1) a composite film is provided and is of a layered structure, and the composite film comprises a substrate, a light absorption polymerization layer formed on the substrate and a packaging layer formed on the light absorption polymerization layer; and (2) the composite film is scanned by using laser, the laser penetrates through the substrate and then irradiates the light absorption polymerization layer, carbonization decomposition is conducted on the region of the light absorption polymerization layer irradiated by the laser, and a patterned conductive circuit is formed by residues obtained by means of carbonization decomposition, and the laser selectively carbonizes the region of the light absorption polymerization layer in the interlayer to form the patterned conductive circuit, so that the embedded circuit is prepared in the multi-layer structure. The method is simple in process and low in cost, and solves the problem of electrode breakage caused by large seal deformation in the traditional transfer printing process and the stress mismatching effect in the packaging process.

The invention provides an oil tank externally-pasted liquid level switch detection method based on guided waves. The method comprises the following steps that 1, a guided wave excitation element and a guided wave sensing element are pasted to the outer side of an oil tank; 2, when the liquid level of the oil tank does not reach the detection height, collecting and storing a guided wave signal; 3, when the liquid level of the oil tank changes, whether the liquid level of the liquid in the oil tank reaches or not is judged according to the guided wave signal, and therefore the guided wave excitation element and the guided wave sensing element are pasted to the position, needing to be detected, of the liquid level on the outer side of the oil tank; whether the liquid level reaches the detection height or not is known by comparing the energy change rate between the guided wave signal when the liquid level does not reach the liquid level detection height and the guided wave signal when the liquid level changes with a threshold value, and therefore the method has the advantages that holes do not need to be formed in the oil tank wall, and the structural integrity of the tank wall is not damaged.

The invention belongs to the field of wireless communication, and relates to an antenna device used in a short-distance wireless communication system. The antenna device is an antenna device formed in a mobile electronic device, including: a coil conductor, a flexible substrate, a magnetic material and a shell conductor layer. The coil conductor is an annular or helical coil with the winding center as the coil opening, and the flexible substrate attached to it is assembled on the surface of the magnetic sheet material. The shell conductor layer divides the shielding of the coil conductor into two areas: the first area is the shielding part of the non-shell conductor layer, that is, the actual magnetic link coupling part of the antenna, and the coil conductor of this part adopts a narrow line width design or most of it adopts a narrow line width design , and use the parallel design of double conductor layers; the second area is the shielding part of the shell conductor layer, and the coil conductor in this area is designed with wide lines. The invention has the positive effects of not destroying the structural integrity of the metal part of the casing of the mobile device, occupying a small space and having high performance.