37results about How to "Shield electromagnetic interference" patented technology

The invention relates to the technical field of hollow part production, and discloses a metal-plastic composite car lamp frame shell integrated injection molding device which comprises an injection molding machine, a movable mold and a fixed mold are installed in the injection molding machine, an external manipulator and an external cooling module are installed outside the injection molding machine, and two fixing holes are symmetrically formed in the outer surface of the movable mold; an injection molding assembly is arranged in the injection molding machine, the injection molding assembly comprises not less than two metal pipes and not less than four extension pipes, and in the cooling process, the metal pipes are cooled from inside to outside based on the physical characteristics of the metal pipes; by means of the cooling mode, the middle of the molding material is cooled and shrunk firstly, the situation that the outer layer is solidified firstly due to the fact that cooling is conducted from the outside to the inside of the cavity traditionally is changed, when the internal material is cooled and shrunk, limitation of the solidified outer layer material is avoided, and therefore the problem that cavities are generated due to inconsistent shrinkage is effectively prevented.

The invention discloses a railway digital signal cable, and relates to the technical field of cables, the railway digital signal cable comprises a cable body, and the outer surface of the cable body is provided with a protection assembly. When the protective assembly is used, the protective assembly is dragged to a position where the protective assembly needs to be installed, and then one end of the tightening belt is lifted upwards, so that the clamping column is separated from the elastic hole. When the cable is tightened, the tightening sleeve is pinched to wrap the outer surface of the cable body, then the tightening belt is tightened in the direction of the loop side of the hook-and-loop fastener to be tightly wound on the outer surface of the tightening sleeve, and the tightening belt is pressed to enable the clamping column to penetrate through the elastic hole to fix the tightened tightening belt. When the cable body is installed, the fixing clamp is sleeved on the protective sleeve, so that the protective sleeve is not in direct contact with the cable body, the cable body is protected, the cable body is prevented from being abraded by the clamp, the service life of the cable body is prolonged, and the stability of signal transmission is improved.

The invention discloses an indoor plant lighting and breeding device and a plasma lamp. The plasma lamp comprises a resonant cavity heat dissipation device, a light-emitting assembly, a radio frequency driving heat dissipation device, a direct-current power source and a heat isolation plate. According to the working temperature and the heat dissipation requirement of each component, a heat separation mode is adopted, and the resonant cavity device and the light-emitting assembly are arranged in an accommodating space; the radio frequency driving heat dissipation device and the direct-current power supply are arranged in the other accommodating space, and the resonant cavity heat dissipation device is connected with the radio frequency driving heat dissipation device through a wire; wherein the light-emitting assembly is arranged at the front end of the resonant cavity heat dissipation device, and the thermal isolation plate is arranged between the radio frequency driving heat dissipation device and the direct-current power supply; the plasma lamp further comprises a horizontal connecting plate, the two ends of the horizontal connecting plate are fixedly connected with the resonant cavity heat dissipation device and the radio frequency driving heat dissipation device respectively, and the problems that in the prior art, heat of all components in a plasma lamp is mutually crossed and transferred, the service life is affected, and the size of a large heat dissipation device is needed are solved.

The invention relates to the field of cable installation, in particular to a marine environment resistant electric connector which comprises a male connecting seat and a female connecting seat, the male connecting seat comprises a first gold-plated outer cylinder and a first inner core, and the inner wall of the first gold-plated outer cylinder is provided with at least one PTFE insulating layer; the first inner core comprises a male terminal, a first PTFE insulator, a first crimping sleeve and a first heat-shrinkable sleeve, the front end of the male terminal is a connecting plug, the rear end of the male terminal is a first wiring part used for being connected with a cable, the male terminal is arranged in the first crimping sleeve, and the first PTFE insulator is arranged in the first crimping sleeve; the first PTFE insulator is arranged in the first crimping sleeve and is positioned between the inner wall of the first crimping sleeve and the male terminal; the first heat-shrinkable sleeve is sleeved in the first crimping sleeve to form the first inner core; through reasonable material selection and structural design, the cable has remarkable advantages in the aspects of corrosion resistance, sealing performance, electrical insulating performance and signal transmission stability, and can reliably operate in a marine environment for a long time.

This utility model relates to the field of electromagnetic shielding materials technology, and provides an electromagnetic shielding composite material structure, including a first shielding layer and a protective structure. A second shielding layer is disposed on one side of the first shielding layer, and a protective structure is disposed inside both the first and second shielding layers. By providing the protective structure, when electromagnetic waves are incident on the electromagnetic shielding composite material, the first and second metal film layers effectively reflect most of the electromagnetic waves back to their original direction, thus preventing electromagnetic wave penetration. Furthermore, a heat insulation layer is provided to prevent heat transfer. This heat insulation layer is an electromagnetic shielding heat insulation material with functions such as heat insulation, waterproof sealing, and corrosion resistance, thereby protecting the internal structure or equipment of the composite material from the effects of high-temperature environments. Finally, a wear-resistant layer is made of transparent PET material, which has properties such as abrasion resistance and corrosion resistance.

The utility model belongs to the technical field of transducers, and discloses an ultrasonic transducer. The ultrasonic transducer comprises a shell, piezoelectric ceramics, a cover plate, a matching layer piece and a leading-out wire set, a containing cavity is formed in the shell, an opening is formed in the shell, the piezoelectric ceramics are arranged in the containing cavity, the cover plate covers the opening and can shield electromagnetic interference, the matching layer piece is attached to the piezoelectric ceramics and arranged on the side away from the cover plate, and the leading-out wire set is arranged on the matching layer piece. And the outgoing line group is connected with the positive electrode of the piezoelectric ceramic and the negative electrode of the piezoelectric ceramic. Through the arrangement that the cover plate can shield electromagnetic interference, the ultrasonic transducer can shield external electromagnetic field interference, and the production cost of the ultrasonic transducer can be reduced.

The utility model provides a control panel shielding installation box which comprises an upper cover, a lower box body, a locking support and a debugging leading-out interface. The upper cover and the lower box body are detachably assembled into a shell structure of which the middle part is used for accommodating the control panel body; a through hole is formed in the side face of the upper cover, a debugging leading-out interface is installed at the through hole, and the debugging interface of the control panel body is electrically connected with the debugging leading-out interface through a wire harness. The locking support is fixed to the side face of the lower box body and used for being connected with a cabinet body. According to the utility model, the shielding installation box assembled by the upper cover and the lower box body is additionally arranged, the control panel body is installed in the shielding installation box, and then the control panel body is installed in a required cabinet body through the locking support, so that external electromagnetic interference to the control panel is shielded; meanwhile, the side surface of the upper cover of the shielding installation box is provided with a through hole for installing a debugging lead-out interface, and the debugging interface on the control panel body is led out and connected to the debugging lead-out interface through a wire harness, thereby facilitating the plugging of the interface for debugging wiring.

The invention discloses a multifunctional glass fiber insulating sleeve and a manufacturing process, and relates to the technical field of insulating sleeves, the multifunctional glass fiber insulating sleeve comprises an inner protective layer, the outer wall of the inner protective layer is sleeved with a waterproof layer, the outer wall of the waterproof layer is sleeved with a flame-retardant layer, the outer wall of the flame-retardant layer is sleeved with an insulating layer, the outer wall of the insulating layer is sleeved with a stab-resistant layer, and the stab-resistant layer is arranged on the outer wall of the stab-resistant layer. The outer wall of the puncture-proof layer is sleeved with an outer protection layer, and the outer wall of the outer protection layer is provided with a buffer ring. When the sleeve is extruded, the buffer ring is compressed, air in the buffer ring is jetted to the surface of the sleeve through the air jetting holes, when the buffer ring loses pressure, new air is sucked through the air jetting holes, the air flowing speed on the surface of the sleeve can be increased in a reciprocating mode, and therefore the heat dissipation speed of the sleeve is increased; external electromagnetic interference can be effectively shielded through the tinned copper wire braid layer, signal or power transmission in the cable is protected from being affected by the external electromagnetic environment, and meanwhile the anti-puncture effect of the sleeve can be improved through the tinned copper wire braid layer.

The present application provides a female connector comprising: a terminal assembly, the terminal assembly comprising a plurality of conductive elements and an accommodating part for accommodating the plurality of conductive elements, the accommodating part and the plurality of conductive elements being molded into an integrated piece; the conduction component is arranged on at least one part of the outer side part of the accommodating part in a sleeving manner; the first shell is arranged on the outer side part of the conduction component in a sleeving manner and is attached to the conduction component, and the first shell surrounds at least one part of the terminal assembly; the female seat connector comprises a first shell and a second shell, the second shell is attached to the outer side portion of the first shell, the female seat connector further comprises an attachment component fixedly connected to the outer side portion of the second shell, and the attachment component is provided with a mounting hole.

The invention relates to the field of sensors, in particular to an anti-electromagnetic interference MEMS pressure sensing element which comprises a shell, a pressure sensitive film is arranged on the top of the shell, a sealed cavity is formed in the shell, pressure sensitivity and electrical detection are separated, the pressure sensitive film is exposed in the air, a capacitor structure is arranged in a box body in the sealed cavity, and the pressure sensitive film is exposed in the sealed cavity. The external electromagnetic interference on the capacitor structure is shielded; the pressure sensitive film deforms along with pressure change, so that air pressure in the sealed cavity is driven to change, the movable polar plate is driven to move through air pressure change, the movable polar plate and the corresponding first fixed polar plate form a first capacitor, and the movable polar plate and the corresponding second fixed polar plate form a second capacitor. The external pressure can be detected by detecting the change of the capacitance, and the movable polar plate is not in contact with the pressure sensitive film, so that the problem that the movable polar plate affects the bending deformation of the pressure sensitive film in the traditional capacitive MEMS pressure sensor is avoided.

The present application relates to the technical field of spectrometer, and specifically discloses a light source excitation assembly of a spectrometer, the spectrometer comprising a light inlet channel, the light source excitation assembly comprising: a placing table cooperating with a clamping component; a through hole is arranged in the middle of the placing table, the center of the through hole is coaxial with the center of a bottom excitation component; an excitation table is arranged in close contact with the bottom of the placing table, a groove is arranged on the excitation table, one end of the groove facing the light inlet channel abuts against an adjustable light barrier, a ventilation hole is arranged at the bottom of the end of the groove away from the light inlet channel, and a light inlet hole corresponding to the light inlet channel is arranged on the excitation table; the adjustable light barrier is arranged in the center of the through hole of the light inlet channel, and the light transmission height of the adjustable light barrier is adjustable; the bottom excitation component is fixedly arranged in the middle of the groove; and the axis of the light inlet channel is arranged at a preset included angle with the plane where the light inlet hole is located. Through improvement of the light source excitation assembly, a larger irradiation intensity is allowed to be used for detection of a sample to be measured, so that the characteristic spectral signal dispersion rate and signal density during detection are improved, and the detection range of substances is expanded.

The present invention discloses an optical voltage sensor mounting device for measuring GIS bus voltage, comprising a mounting device housing, a matching sensor bracket and a pressure plate arranged in the mounting device housing for mounting an optical voltage sensor, an optical fiber flange arranged on the device housing and used in conjunction with the optical voltage sensor, and a connecting plate for fixing the mounting device housing to the GIS housing flange; the mounting device housing is designed with an opening surface that fits with a pot-type insulator and a GIS housing flange; the optical voltage sensor is crimped and fixed to the bracket by adjusting the fastening screws at both ends of the pressure plate. The present invention fixes the optical voltage sensor on the outer surface of the insulating part of the GIS pot-type insulator by means of the mounting device housing and the connecting plate, and uses the optical voltage sensor to measure the electric field distribution therein, which can not only realize the measurement of the GIS bus voltage, but also realize the installation, disassembly, operation and maintenance of the sensor without affecting the operation of the primary equipment.

The utility model discloses a high strength shock resistant rubber medium voltage cable relates to medium voltage cable technical field, including cable core, the cable core is composed of two sets of wire core, the wire core includes conductor, wrapping the outside of conductor insulating layer and wrapping the outside of insulating layer shielding layer, the outside of cable core is provided with buffer layer, and the outside of cable core is provided with the buffer layer. The buffer layer comprises an elastic inner layer and a fiber braid layer, the elastic inner layer is coated with the fiber braid layer, a reinforcing layer is arranged outside the buffer layer, the reinforcing layer comprises a supporting inner layer and an anti-impact outer layer, the supporting inner layer is coated with the anti-impact outer layer, an outer protective layer is arranged outside the reinforcing layer, and the anti-impact outer layer is arranged outside the outer protective layer. The outer protective layer comprises a wear-resistant base layer and an anti-tear surface layer, the wear-resistant base layer is coated with the anti-tear surface layer, and the problems that the impact resistance effect of the medium-voltage cable is poor and the improvement of the insulation performance is limited are solved.

The utility model discloses a high-voltage circuit breaker synthesis test ignition device and a synthesis test device, and belongs to the technical field of high-voltage circuit breaker tests. Comprising a photoelectric isolation unit, an MOS tube, a transformer, a first ignition ball, a first capacitor and a voltage source. The input end of the optoelectronic isolation unit is used for receiving optical pulse signals, the first end of the optoelectronic isolation unit is electrically connected with the grid electrode of the MOS tube, the drain electrode of the MOS tube is electrically connected with the first end of the voltage source, the second end of the voltage source is electrically connected with the first end of the transformer, and the second end of the transformer is electrically connected with the second end of the optoelectronic isolation unit. The third end and the fourth end of the transformer are electrically connected with the first ignition ball, and the first ignition ball is electrically connected with the first capacitor. Operation safety and stability of equipment can be improved, and the problem that an existing ignition device is insufficient in operation safety and stability is solved.

The utility model relates to a gallium nitride charging circuit for solving EMI conduction, which comprises a circuit board, an EMI anti-interference circuit and a gallium nitride switch tube, the EMI anti-interference circuit and the gallium nitride switch tube are arranged on the circuit board, an isolation wire is arranged on the circuit board between the EMI anti-interference circuit and the gallium nitride switch tube Q1, and the isolation wire is grounded. According to the technical scheme of the utility model, the distance between the switching tube and the EMI circuit can be kept very close while electromagnetic interference is shielded, so that the size of a corresponding PCB can be smaller.

The utility model belongs to the technical field of mutual inductors, and particularly relates to an anti-interference mutual inductor which comprises a mounting plate, round holes are formed in the mounting plate, a supporting column is arranged on the top of the mounting plate, a wiring end is arranged on one side of the supporting column, a shell is arranged on the top of the supporting column, a boss is arranged on the top of the shell, and a mutual inductance assembly is arranged in the shell. According to the utility model, the shielding cover and the shielding rings are arranged, the coil is placed in the shielding cover, and the shielding rings are arranged on the two sides of the shielding cover and the coil, so that the electromagnetic shielding effect of the transformer is enhanced, the transformer can stably output, the insulating layer and the anti-interference layer are arranged, the insulating layer is epoxy resin, and the epoxy resin is good in electrical insulation performance; and the anti-interference layer is a conductive fabric and can shield electromagnetic radiation and electromagnetic interference generated by a high-frequency electronic device, so that the anti-interference performance is further improved, the mutual inductor is free from external interference, the safety of the mutual inductor is improved, and the personal safety is guaranteed.

The invention discloses a board-to-board connector with a shielding structure. The board-to-board connector with the shielding structure comprises a first circuit board, a first connecting piece, a buffer conductor, a second circuit board, a second connecting piece and a shielding cover, the first connecting piece is arranged on the first circuit board; the buffer conductor is arranged on the first circuit board and surrounds the first connecting piece; the second circuit board is perpendicular to the first circuit board, and one side edge of the second circuit board is provided with a first metal layer; the second connecting piece is arranged on the second circuit board and is in butt joint with the first connecting piece along a butt joint direction; the shielding cover is arranged on the second circuit board and surrounds the second connecting piece; when the second connecting piece is in butt joint with the first connecting piece in the butt joint direction, the side edge of the second circuit board abuts against the buffering electric conductor, so that the first metal layer is electrically connected to the buffering electric conductor, and the shielding cover surrounds the first connecting piece. The first metal layer of the board-to-board connector with the shielding structure provided by the invention can make up the problem that the shielding cover cannot completely shield the connector.

The utility model discloses an anti-electromagnetic interference shielding shell structure based on a new energy automobile motor controller, which comprises a mounting seat, the top of the mounting seat is connected with a protective shell in a clamping manner, the inner wall of the protective shell is connected with a metal shielding layer in a clamping manner, and the top of the mounting seat is in bolted connection with an exhaust fan close to one side. Buckle structures are symmetrically and fixedly connected to the positions, close to the side wall, of the top of the mounting base, and a reinforcing assembly is mounted at the position, close to the corner of one end, of the top of the mounting base. According to the motor controller, the metal shielding cover is arranged in the controller shell, so that external electromagnetic interference can be shielded, the motor controller can work stably, the shell is arranged to be in a covering mode, the motor controller can be rapidly installed and fixed through a buckle structure, and meanwhile, the positioning and reinforcing assembly is additionally arranged, so that the motor controller can work stably. And the protection strength of the whole controller shell is improved.

The utility model relates to the field of cables, and discloses a flame-retardant fireproof cable, which comprises a wire and a wear-resistant protective sleeve, the outer wall of the wire is fixedly connected with a first insulating layer, the outer wall of the first insulating layer is fixedly connected with a first flame-retardant layer, the inner wall of the wear-resistant protective sleeve is fixedly connected with a second flame-retardant layer, and the outer wall of the second flame-retardant layer is fixedly connected with a second flame-retardant layer. The inner wall of the second flame-retardant layer is fixedly connected with a second waterproof layer, the inner wall of the second waterproof layer is fixedly connected with a metal armor layer, the inner wall of the metal armor layer is fixedly connected with a compression-resistant layer, the inner wall of the compression-resistant layer is fixedly connected with a second insulating layer, and the inner wall of the second insulating layer is fixedly connected with a first waterproof layer. According to the utility model, through the second flame-retardant layer, the cable can be prevented from burning when a fire disaster occurs, the damage degree of the fire disaster to the cable is reduced, and through the first flame-retardant layer, the problem of spontaneous combustion of the cable caused by local overheating due to short circuit of the cable is solved.

The utility model relates to the technical field of electric connectors, and provides an electric connector shielding spring which comprises a socket body, a spiral shielding spring and a connecting assembly for transmitting signals, a trapezoid groove is formed in the top end of the outer wall of the socket body and matched with the spiral shielding spring, edge extrusion parts are arranged on the upper side edge and the lower side edge of the periphery of the trapezoid groove, and the bottom face of the trapezoid groove is a back part. And the spiral shielding spring is inversely buckled by the edge extrusion part to abut against the back, so that the spiral shielding spring is tightly attached to the trapezoidal groove. According to the technical scheme, the technical problem of electromagnetic interference of the connector is solved, and the effect that the connector shields interference signals without dead angles is achieved.

A structure capable of reducing electromagnetic interference of a display module comprises a glass cover plate, a display screen, a display FPC, a touch FPC and a COF package. The left side of the bottom of the front face of the display FPC is provided with an FPC copper exposing area. Composite conductive cloth is arranged on the FPC copper exposing area, and a COF package is arranged at the bottom of the composite conductive cloth. According to the structure capable of reducing the electromagnetic interference of the display module, the composite conductive cloth is attached to the COF package of the display screen, and the FPC copper exposing area arranged on the display FPC is also covered by the conductive cloth, so that the interference of a driving chip on the display module and the display FPC on signals such as an antenna on a wearable product when the driving chip and the display FPC work can be shielded; therefore, the electromagnetic interference in the display module can be reduced, and the competitiveness of the display module is improved.

The utility model discloses an anti-shake anti-electromagnetic communication wire harness, which comprises a wire harness main body with a flat structure, the front end and the rear end of the wire harness main body are fixedly provided with connectors, the wire harness main body is connected and communicated with equipment through the connectors, and the side surface of each connector is provided with a stabilizing assembly. The connector and the equipment are connected in a sticking manner through the stabilizing assembly; positioning sleeves are mounted outside the wire harness main body at equal intervals in a sleeving manner, fixing assemblies are arranged outside the positioning sleeves, and the wire harness main body and the device are connected in a binding manner through the fixing assemblies. According to the anti-shaking and anti-electromagnetic communication wire harness, the novel structural design is adopted, the fixing assembly is arranged, after the wire harness body is installed, the wire harness body is fixed to a fixing object beside the wire harness body through the fixing ribbon outside the positioning sleeve, and therefore shaking of the wire harness in the using process is reduced, and the situation that the wire harness is loosened due to long-term shaking is avoided.

This invention discloses a cavity electrically tunable preselection filter, relating to the field of wireless communication equipment. It includes a mounting cavity and a PCB board. The PCB board is fixed to the mounting cavity via connectors and houses an integrated circuit and a coil assembly. The mounting cavity contains four resonant cavities and two circuit-shielded resonant cavities. The four resonant cavities are arranged side-by-side along the length of the mounting cavity. The two circuit-shielded resonant cavities are arranged side-by-side along the width of the mounting cavity and located in the middle of the four resonant cavities, serving to shield the integrated circuit and provide resonance for the resonant cavities on either side. The coil assembly includes four coils for specific frequency bands. The four coils are electrically connected to the PCB board and located within the four resonant cavities. It features a compact structure, excellent filtering performance, and adaptability to complex electromagnetic environments.

The invention provides an anti-interference integrated etching end point detection device. The anti-interference integrated etching end point detection device comprises a signal collection module, a signal processing module and a signal processing module, wherein the signal collection module is used for collecting optical signals in an etching cavity; the interference end point detection function module and the optical emission spectrum end point detection function module are respectively used for receiving and processing optical signals in different process scenes, and the interference end point detection function module comprises a xenon lamp light source used for providing a light source for detection in a first process scene and a boosting power supply module used for supplying power to the xenon lamp light source. According to the invention, the OES and IEP functions are integrated and anti-interference design is carried out to form a complete machine, interference end point detection and optical emission spectrum end point detection are carried out at the same time, and accurate detection of an etching end point is realized through integration of double detection functions by one device. According to the invention, the large dispersion space occupied by single-function equipment is reduced, the integrated volume is minimized, and the space utilization rate is improved.

The utility model discloses a circuit grounding structure based on an aluminum substrate, which is characterized in that a reference ground of a radio frequency circuit is arranged at the edge of a copper metal layer, and an aluminum shell is contacted with the copper metal layer and an aluminum metal layer of the aluminum substrate, so that the reference ground and the aluminum metal layer which are respectively positioned on the two sides of an insulating layer are conducted through the aluminum shell; electromagnetic interference shielding is achieved, and holes do not need to be formed in the aluminum substrate. Meanwhile, connection is carried out based on an existing insulating shell of the lighting equipment, conductive metal does not need to be additionally arranged, the circuit grounding mode is simplified, and production cost is reduced.

The utility model discloses a motor structure and vehicle electric power assisted steering system with it relates to motor technical field, including: the pivot, the fixed sleeve, the fixed sleeve downside is provided with the first mounting hole, the pivot upper end is inserted into the first mounting hole, the fixed sleeve upside is provided with the second mounting hole, the hole wall of second mounting hole is non -circular hole wall, the inductive magnet is located in second mounting hole, the lateral wall of inductive magnet is non -circular lateral wall, the outside wall of non -circular lateral wall is stuck up the inside wall of non -circular hole wall, the circuit board is located inductive magnet top, the circuit board downside is provided with sensor, the fixed sleeve is installed in pivot end position, and inductive magnet is not easy to axial deviation on the pivot, and the non -circular lateral wall of inductive magnet and the non -circular hole wall of fixed sleeve correspond with the design of fixed sleeve and ensure that inductive magnet is not easy to rotate and slide deviation on the pivot, so as to guarantee the precision of sensor pivot monitoring.

The utility model discloses a total shielding layer and branch shielding layer pressure-resistant torsion-resistant computer cable, which sequentially comprises an outer protection layer, a pressure-resistant protection layer, a total shielding layer and an outer wrapping layer from outside to inside, and is characterized in that the pressure-resistant protection layer comprises two wrapping units, and the outer wrapping layer is internally provided with a skeleton unit, a plurality of computer cable cores and a plurality of tensile cable cores. According to the computer cable, the framework unit is provided with the substrate part, and the substrate part is provided with the first branch part and the second branch part, so that the computer cable has a good anti-torsion effect; the tensile cable cores on the two sides have a good tensile effect, so that the tensile strength of the cable is enhanced; the two wrapping units realize a good voltage-withstanding protection effect, so that the voltage-withstanding performance of the cable is improved; the total shielding structure and the branch shielding structure achieve a better shielding effect, can effectively shield electromagnetic interference from the internal environment and the external environment, and improves the transmission quality of signals.

The utility model relates to a kind of multilayer polycarbonate radar protective cover with outer surface heating function, including polycarbonate base material, polycarbonate base material outer surface is sequentially provided with hardening layer, ITO film layer, AR film layer, the upper end of ITO film layer is provided with upper conductive silver paste, the lower end of ITO film layer is provided with lower conductive silver paste, the cross section of the upper conductive silver paste and the lower conductive silver paste is cylindrical.The utility model can effectively improve the operating performance of radar system, prevent water vapor condensation or frost formation.

The present invention provides a drive-control integrated motor, the main body of which is embedded in the stator and extends from the middle of the stator to the end of the stator to form a groove; the puncture piece is inserted into the groove of the winding skeleton, and an electrical connection is formed with the stator winding lead-out wire head through puncture inside the groove; the other end of the puncture piece is welded to the busbar circuit board, and the busbar circuit board and the control circuit board are electrically connected through a rectangular socket, a rectangular plug and a cable; after the control circuit board and the drive circuit board are connected by a screw and isolated by a limit device, the outer cylindrical surface is wrapped by a reel and then inserted into the inner cylindrical hole of a barrel-shaped structure heat dissipation base; the heat dissipation base and the shell are connected by an end cover. The present invention can realize the miniaturization, integration and low cost of the drive-control integrated motor while ensuring reliable electrical connection, effective heat dissipation and optimized structural support.

The present invention discloses an artificial electret and an electret antenna. The artificial electret includes: a first electrode for connecting to the positive electrode of a power supply; a second electrode for connecting to the negative electrode of a power supply; a metal layer, one of two adjacent metal layers is connected to the first electrode, and the other of the two adjacent metal layers is connected to the second electrode; and a dielectric layer, a dielectric layer is arranged between two adjacent metal layers. The electret of the present invention includes a positive electrode plate, a negative electrode plate, multiple metal layers and multiple high-dielectric dielectric layers. The high-dielectric dielectric layer is located between the metal layers, providing the metal layers with anti-breakdown capability, thereby increasing the amount of charge stored in the metal layers. When the electret rotates, the ability to generate a time-varying electric field in space can be achieved. A large amount of charge is provided to the multiple metal layers through the positive electrode plate and the negative electrode plate. The surface charge density is more than 20 times that of the passive electret under the same size, and the multi-layer structure can increase the electric dipole moment, greatly improving the communication distance.