22results about How to "Achieve shielding" patented technology

The utility model discloses a long-distance anti-metal biaxial 125kHz RFID access control antenna, including RFID reading coil, flexible soft magnetic film and metal layer, flexible soft magnetic film is provided on one side of RFID reading coil, metal layer is provided on one side of flexible soft magnetic film far away from RFID reading coil, RFID reading coil includes Y-axis coil and X-axis coil, the Y-axis coil and the X-axis coil are connected in parallel, and the X-axis coil and the Y-axis coil are connected in parallel. According to the RFID reading coil, the Y-axis coil and the X-axis coil form two axial magnetic fields in an orthogonal mode, the position adaptability of the RFID reading coil to a tag card is further improved, the coil Q value and self-inductance are optimized by optimizing the number of turns and the wire diameter, the magnetic field receiving and transmitting capacity is improved, long-distance recognition is achieved, and the RFID reading coil has the advantages of being simple in structure and convenient to use. The flexible soft magnetic film and the metal layer are additionally arranged on the back of the RFID reading coil, so that shielding of a backward magnetic field is achieved, and the recognition distance can be further increased.

The utility model discloses a video cable for a robot with a body, which is characterized in that a first shielding tape is lapped outside a cable core formed by twisting at least two signal transmission core wires and at least two electric energy transmission core wires, a metal braid layer is arranged outside the first shielding tape, a sheath layer is coated outside the metal braid layer, and a second shielding tape is arranged outside the sheath layer. A second shielding tape wraps the outer side of a data wire core formed by twisting at least two signal transmission core wires, each of the first shielding tape and the second shielding tape comprises a base material layer and an aluminum foil layer attached to the surface of one side of the base material layer through a glue layer, and the aluminum foil layer of the first shielding tape makes contact with the metal braid layer in an attached mode. According to the utility model, the anti-interference performance can be improved, the anti-bending performance and roundness of the cable can be ensured, and the shielding of high-frequency and low-frequency signals can be realized at the same time so as to improve the signal shielding range.

This invention provides an oral cleaning device and its control method. The oral cleaning device includes a first pressure detection area and a second pressure detection area spaced apart from the first pressure detection area. The control method includes: acquiring first pressure information of the first pressure detection area and second pressure information of the second pressure detection area; determining a shielding state of the first pressure detection area based on the second pressure information; the shielding state includes a shielded state and an unshielded state; when the first pressure detection area is triggered, if the shielding state is unshielded, determining whether to execute a target action based on the first pressure information; if the shielding state is shielded, not responding to the triggering state action of the first pressure detection area. This invention, by combining the detection and processing of the pressure status of the second pressure detection area, can shield the triggering of the first pressure detection area, reducing false triggering of the oral cleaning device.

The present invention discloses a safe hemodialysis indwelling needle, including a hemodialysis needle tube assembly, a catheter assembly and a needle tip shielding assembly. The needle tip shielding assembly is provided with a needle cavity, a needle passage and a limiting mechanism for limiting the needle in the needle cavity to prevent the hemodialysis needle tube needle tip from being pulled off the needle tip shielding assembly. A magnet cavity is also provided in the needle passage, and a first fixed magnet and a movable magnet are provided in the magnet cavity. In the initial state, the movable magnet is outside the needle passage. In the protection state, the attraction between the first fixed magnet and the movable magnet is used to make the movable magnet in the needle passage to seal the hemodialysis needle tube needle tip in the needle cavity, thereby shielding the needle tip and preventing the needle from stabbing people during garbage disposal or recycling, causing injuries and secondary cross infection.

The utility model relates to a carburized surface protective sleeve for cadmium plating of a propeller shell, which comprises an elastic sleeve, abutting ends used for elastically abutting against the inner wall of the propeller shell are formed on the outer walls of the two ends of the elastic sleeve, and an annular packing surface is formed on the outer wall of the elastic sleeve and located between the two abutting ends. The annular packing surface can directly face the carburizing surface of the propeller shell to isolate the carburizing surface; the elastic sleeve is designed on the basis of the cyaniding cadmium plating technological process, on the basis of the structure of the carburized surface of the propeller shell and on the basis of the size of the carburized surface, the elastic sleeve is fully attached to the carburized surface, and a power line is completely shielded, so that a cadmium plating layer is prevented from being deposited on a shielded part, and the elastic sleeve can easily enter and exit from an inner cavity of the carburized surface of the propeller shell; rapid mounting and dismounting are realized, a carburized surface can be fully attached, and shielding of a power line is realized.

The utility model relates to the technical field of moving iron units, in particular to a magnetic leakage prevention box cover which comprises a first lower cover, a first storage bottom cavity is formed in the first lower cover, and a first wire outlet groove is formed in the left side of the first lower cover. According to the magnetic leakage prevention box cover, through the upper cover and the lower cover which are large in upper portion and small in lower portion, the upper cover can cover the lower cover conveniently, the magnetic leakage prevention function of the box cover is achieved, meanwhile, the connecting cavities in the protruding blocks are filled with the connecting cavities in a welding or gluing mode, the protruding block cavities are connected with the lower cover, combination of the upper cover and the lower cover is completed, and therefore the problem of magnetic leakage is completely eradicated; through the flaring sealing square frame and the step supporting square frame of the second lower cover and the second upper cover, the second upper cover and the second lower cover can be more effectively prevented from magnetic leakage after being sleeved up and down, the new upper cover and the new lower cover do not adopt a butt joint mode, and the upper cover and the lower cover are partially crossed to achieve magnetic shielding. And the position of the bottom clamping block is staggered on the two sides to shield the magnetism.

The utility model discloses a bending-resistant multi-core shielding cable, and relates to the technical field related to power transmission. The cable comprises a center reinforcing steel strand, an inner ring sleeve and an outer ring sleeve, the center reinforcing steel strand is located on the inner side of the inner ring sleeve, the inner ring sleeve is located on the inner side of the outer ring sleeve, and a first reinforcing wire is inserted in the connecting position of each arc sleeve and the inner ring sleeve in a penetrating mode; a copper-plastic composite wrapping tape and a metal wire mixed woven shielding film are wound outside all the arc sleeves, a second reinforcing wire is inserted into the outer ring sleeve in a penetrating mode, and a copper wire wrapping tape and a copper wire shielding layer are wound outside the outer ring sleeve in a wrapping mode. According to the utility model, the central reinforcing steel strand, the inner ring sleeve, the outer ring sleeve, the first reinforcing wire, the second reinforcing wire, the copper-plastic composite wrapping tape, the metal wire hybrid shielding film, the shielding tape, the copper wire wrapping tape and the copper wire shielding layer are arranged, so that the problems that the bending resistance of the cable is insufficient, the shielding effect of the cable inner wire cores is poor, and the stacking arrangement of the multiple wire cores in the multi-core cable is poor are solved; and local torsional stress can be increased.

The utility model relates to the field of microelectronic, disclose a kind of flexible circuit board, anti-shake motor and electronic equipment.The utility model includes: first metal layer, insulating layer and second metal layer;Bent flexible circuit board's first metal layer includes: first surface and fourth surface, bent flexible circuit board's second metal layer includes: second surface and third surface;First surface, second surface, third surface and fourth surface are sequentially arranged along first direction;Capacitor structure's polar plate unit is etched on first surface, driving chip is arranged on third surface or fourth surface, polar plate is connected with driving chip by first circuit, driving chip is connected with external pin by second circuit, and first circuit and second circuit are respectively at the two sides of driving chip.The structure of bent single-layer flexible circuit board realizes the function of multilayer flexible circuit board structure, avoids crosstalk between circuit while reducing the manufacturing cost of flexible circuit board.

The invention relates to a lubricant guide housing (32) for being arranged in the region of a hydrodynamic torque converter, comprising a radially extending first section (33) which is arranged for axially opposite positioning to one end face (35) of the torque converter (9) in the installed state of the lubricant guide housing (32). The first section (33) transitions radially outwardly into an axially extending second section (34) which is configured for axially at least partially and radially outwardly surrounding the torque converter (9) starting from the first section (33) in the installed state of the lubricant guide housing (32). In order to realize a lubricant guide housing by means of which an excessive accumulation of lubricant in the region of the hydrodynamic torque converter can be reliably prevented, both the first section (33) and the second section (34) are configured to be completely annular.

The application relates to a B-grade high-flame-retardant shielding network line manufacturing equipment, which comprises a rack, a first wire combining mechanism, a second wire combining mechanism, an injection mechanism and a winding mechanism arranged on the rack in sequence along a production direction, the first wire combining mechanism is used for assembling and manufacturing between a first shielding layer and a plurality of second wire cores and a first wire core, the second wire combining mechanism is used for assembling and manufacturing between a second shielding layer and a third wire core and a second wire core, the first wire combining mechanism is used for assembling and manufacturing between a third shielding layer, a reinforcing rib and a protective layer and a third wire core, and the B-grade high-flame-retardant shielding network line is formed, and the winding mechanism is used for winding the formed B-grade high-flame-retardant shielding network line into a bundle. The application solves the problem that the existing multi-layer structure needs more processes, and when automatic one-time production and manufacturing are carried out, more production equipment leads to the problem of reduced production efficiency.

The application discloses a kind of based on network type VSC current limiting strategy's transient stability control and analysis method, its steps include:1, in voltage control loop using anti-integrator saturation module;2, introduce current saturation angle and determine its optimum value;3, based on the introduction current saturation angle to improve VSC current limiting module;4, based on current limiting module and current saturation angle, using phase diagram to analyze system transient stability.The application introduces current saturation angle to carry out transient stability control, can effectively promote the transient stability of the system formed by network type VSC and infinite grid, and the transient stability of network type VSC is qualitatively analyzed by phase diagram.

The utility model discloses a copper shield and transformer structure for a transformer partial discharge test, which comprises a copper plate piece, the copper plate piece is integrally bent to form a cylindrical structure, and the cylindrical copper plate piece is provided with a first edge, a second edge, a third edge and a fourth edge. The first edge and the second edge are parallel to the axis of the cylindrical copper plate piece, the first edge and the second edge are not in contact, the third edge and the fourth edge are arc edges at the two ends of the cylindrical copper plate piece correspondingly, transition parts are arranged on the third edge and the fourth edge correspondingly, and the transition parts are arranged at the two ends of the cylindrical copper plate piece correspondingly. The copper plate piece and the transition part are wrapped with insulating layers. The shielding sleeve is sleeved between a low-voltage coil and a high-voltage coil of a transformer, so that shielding between the low-voltage coil and the high-voltage coil is realized, transmission of partial discharge interference signals on a low-voltage side to a high-voltage side is reduced, background partial discharge quantity is reduced, and test accuracy is improved.

The application discloses a shielded RJ45 connector and an assembling equipment thereof, and belongs to the field of connectors. The connector comprises a first shield and a second shield, a first shield is arranged between any two adjacent terminal assemblies, the first shield is used for shielding the terminal assemblies adjacent in the horizontal direction, a second shield is arranged between the two terminal assemblies in each pair, the second shield is used for shielding the terminal assemblies adjacent in the vertical direction, the shield between the adjacent terminals is realized, the crosstalk between the terminals is reduced, and the transmission stability of the connector is ensured. In the assembling equipment, two mechanical hands are used for clamping the insulating seat and the shield shell, a pressing plate is used for positioning the bent part by pressing, a bending assembly is used for pre-bending to determine the bending position, and the bending position is bent twice, so that the accuracy and consistency of the bending are effectively ensured, and the machining precision and assembling precision of the shield shell are improved.

The invention relates to the technical field of lithium metal batteries, in particular to an in-situ gel polymer electrolyte based on a high-dipole-moment monomer and a preparation method and application of the in-situ gel polymer electrolyte. The preparation method comprises the following steps: S1, selecting and processing a high dipole moment monomer; s2, preparing an electrolyte precursor solution; s3, using an electrolyte additive; s4, determining the molar ratio of the monomer to the cross-linking agent; s5, carrying out in-situ polymerization reaction; and S6, battery assembly and polymerization reaction. The in-situ gel polymer electrolyte based on the high-dipole-moment monomer is successfully prepared, and the electrolyte improves the interface stability and the electrochemical performance of a lithium metal battery; and the material also has the advantages of relatively wide electrochemical window, high ionic conductivity and lithium ion transference number, good cycling stability, easiness in preparation, cost effectiveness and the like. Due to the characteristics, the electrolyte system has important application value and market potential in the field of lithium metal batteries.

The present application relates to a kind of vehicle SIM card real-name authentication system and method, belong to automobile technical field, the system includes: receiving module is used to obtain the VIN code and vehicle information of vehicle from real-name authentication request;Query module is used to determine the target host factory corresponding to vehicle SIM card;Encapsulation module is used to encapsulate the identity information of car owner, the VIN code and ICCID of vehicle as authentication request data packet, and authentication request data packet is forwarded to the real-name authentication platform of target host factory by network routing module;State management module is used to obtain the binding operation result returned by real-name authentication platform, and based on binding operation result triggers the channel mode of corresponding vehicle SIM card;Storage module is used to store the vehicle-card binding relationship and full life cycle change record formed after each real-name operation.The system realizes the full-process automation unified management of vehicle SIM card real-name authentication in the environment of multiple host factories by the synergistic cooperation of the above module.

A needle puncture prevention device with a limiting spring and a stopper comprises: a catheter seat assembly, the rear end of which is provided with an anti-slip structure; a needle shield, which is provided with a needle through hole, a slide groove, a first positioning groove, and a slot; a stopper, which is slidably installed in the slide groove, one side of which cooperates with the needle tube, and the other side cooperates with the anti-slip structure and the limiting spring; the limiting spring is installed in the first positioning groove and the slot, and a stop hole is provided on it; a needle seat, which covers the rear part of the needle shield; the needle tube passes through the catheter seat assembly, the needle shield, and the limiting spring, and provides support for the stopper, and the rear end of the needle seat is fixed in the needle seat, and a protruding buckle is provided near the front end. Pull the needle seat backward to make the needle seat drive the needle tube to retreat, and when the needle tube retreats to the point where the protruding buckle is blocked by the stop hole of the limiting spring, the front end of the needle tube retreats away from the stopper, and the stopper slides into the slide groove of the needle shield under the action of the limiting spring, thereby blocking the front end of the needle tube, and the needle tip is shielded in the needle shield, thereby improving the safety of the product.

The present invention discloses a WiFi signal shielding fence, comprising at least one fence body, wherein the fence body comprises a substrate and a first isolation fence and a second isolation fence respectively attached to a first surface and a second surface of the substrate, wherein the first isolation fence and the second isolation fence both comprise a plurality of metal bars distributed in an array and a plurality of resistive loads connected in series between adjacent metal bars; the projections of the metal bars of the first isolation fence and the metal bars of the second isolation fence in the thickness direction of the substrate are perpendicular to each other; the entire process decomposes the WiFi signal into parallel components and perpendicular components, utilizes the cross-polarization isolation characteristics of the mutually perpendicular metal bars on both sides of the substrate, absorbs and weakens the WiFi signal, so as to achieve the purpose of shielding, the structure is simple, the use is convenient, and the fence has strong practicality.

According to the data copper cable with the special structure, the shielding layer is sleeved on the periphery of the stranded cable core, the inner protection layer is arranged on the periphery of the shielding layer, the stranded cable core is protected, meanwhile, interference signals are shielded, the armor layer is arranged on the periphery of the inner protection layer, and the shielding layer is arranged on the periphery of the armor layer. The armor layer is an armor tube which is spirally arranged on the periphery of the inner protection layer in a surrounding manner, and an outer protection layer is further arranged on the periphery of the armor layer; the armor layer is excellent in flexibility and excellent in compression resistance, and can ensure that the data copper cable has good compression resistance, so that the data copper cable can adapt to harsh environments such as outdoor environments and the like.

This invention relates to the field of cementing materials technology, specifically disclosing a method for preparing a high-temperature cement stone strength degradation inhibitor and its application. The inhibitor is prepared using a two-step chemical modification method, based on a silane modifier, combined with active aluminum-containing materials, an activator, an alkaline modifier, and a solvent. Through steps such as silicate hydrolysis, surface grafting of the active aluminum-containing material, and secondary modification in an alkaline environment, a core-shell structured composite functional material is constructed. This material effectively inhibits cement stone strength degradation at temperatures of 180℃ and above, achieving a strength exceeding 40 MPa after 28 days of curing at 240℃. Furthermore, when added at a concentration of 10%, it affects the cement slurry thickening time by less than 65 minutes, while minimally interfering with the rheological properties of the cement slurry. It is suitable for high-temperature cementing operations in deep wells, ultra-deep wells, and thermal recovery wells. This invention combines high-temperature stability with construction friendliness, solving the technical challenges of shortening thickening time and increasing pumping risks associated with traditional aluminum-containing pozzolanic materials.

The utility model provides a kind of high-reliability trench gate silicon carbide VDMOS, comprising: drift layer lower side surface is connected to silicon carbide substrate upper side surface;Drift layer is equipped with recess;P-type source area lower side surface is connected to drift layer upper side surface;P-type well area lower side surface is connected to drift layer upper side surface, P-type well area outer side surface is connected to P-type source area inner side surface;P-type well area is equipped with N-type source area;Insulating medium layer lower part is in recess, insulating medium layer is connected to P-type well area and N-type source area;Insulating medium layer is equipped with suspension gate and groove;Suspension gate is located below groove;Gate metal layer is equipped in groove;Source metal layer is connected N-type source area and P-type source area respectively;Drain metal layer is connected to silicon carbide substrate lower side surface;By splitting the conductive channel of device, it can ensure that the device is turned off, and provide body diode large current freewheeling, improve the reliability of device.

The invention discloses electronic equipment, and belongs to the technical field of electronic equipment. The electronic equipment comprises a circuit board assembly which is provided with an electrical assembly; the radio frequency connecting line is connected with the circuit board assembly; the fixing assembly comprises a gasket assembly and a first shielding cover, and the gasket assembly is connected with the first shielding cover; wherein the circuit board assembly is provided with a screw hole, the gasket assembly is arranged around the screw hole, the first shielding cover covers at least one part of the electrical assembly, a clamping part is formed between the gasket assembly and the first shielding cover, and the radio frequency connecting line is clamped at the clamping part.

The invention provides a low-resistance high-reliability trench gate silicon carbide VDMOS and a preparation method thereof, and the method comprises the steps: depositing metal on the lower side surface of a silicon carbide substrate, and forming a drain metal layer; performing epitaxial growth on the upper side surface of the silicon carbide substrate to form a drift layer; forming a barrier layer, and performing etching and ion implantation to form a masking layer, a buried layer, a P-type well region, a P-type source region and an N-type source region; a barrier layer is formed again, a first groove is formed through etching, an insulating medium layer is formed through oxidation, and a groove is formed in the insulating medium layer; the method comprises the following steps of: forming a mask layer, re-forming a barrier layer, etching, depositing, forming a gate metal layer and a source metal layer, and realizing low resistance and high reliability of the device through the structural design of the mask layer and the buried layer.