85results about How to "Play the role of electromagnetic shielding" patented technology

The present application provides a male connector, a female connector, a connector assembly and a communication equipment. The male connector comprises a male conductive base, wherein a plurality of first through holes are arranged on the male conductive base; a plurality of shielding sleeves which are fixed on the male conductive base and electrically connected with the male conductive base, theshielding sleeves have a sleeve structure, a front-back through shielding cavity is formed in the shielding sleeves, a plurality of the shielding sleeves are corresponding to a plurality of first through holes in a one-to-one way and the shielding cavity is communicated with the corresponding first through holes; and a plurality of male differential pairs, wherein a plurality of male differentialpairs are corresponding to a plurality of shielding sleeves in a one-to-one way, the male differential pairs are fixed in the shielding cavity by penetrating through the first through holes and the male differential pairs are electrically insulated from the male conductive base and the shielding sleeves. Compared with the connectors in the prior art, the connector has the advantages of convenientprocessing, high mechanical strength and good shielding effect.

The invention discloses an air and water hybrid cooling high-speed permanent-magnet motor and belongs to the technical field of motors. The large-power high-speed permanent-magnet motor comprises a casing, a cooling water jacket, a stator core, a stator radial air duct, a stator inner air duct, a motor rotor, an outer rotor axial fan, an outer rotor fan fixing frame and two sliding bearings. The stator core is divided into two sections, the radial air duct is reserved in the middle, and the inner air duct is reserved in a stator slot close to the air gap position. The cooling water jacket is arranged outside the stator casing, a spiral water way is arranged in the water jacket, and water flows into the water way from the middle of the water way and flows out from a left spiral water outlet and a right spiral water outlet which are arranged at two ends of the water way. The air and water hybrid cooling high-speed permanent-magnet motor can mechanically solve the problem that a permanent magnet is broken when bearing large pulling stress during high-speed rotating, further solves the problems that the large-power high-speed motor is large in loss density, difficult in heat dissipation and over high in temperature rising, and prevents the permanent magnet from having irreversible demagnetization easily at high temperature.

The embodiment of the invention discloses terminal equipment, and relates to the electronic equipment field. The terminal equipment can consider the thickness of a whole machine at a fingerprint identification module and does not influence the board utilization rate of a main board. The terminal equipment includes a fingerprint identification module, a flexible printed circuitboard FPC and a main board, wherein the fingerprint identification module is pasted on one surface of the FPC; the other surface of the FPC is pasted on a reinforced sheet layer; the reinforced sheet layer is fixed on the main board, and is used for reinforcement of the FPC; and the reinforced sheet layer is also used for shielding a device on the main board. The embodiment of the terminal equipment is used for assembling of terminal equipment.

The invention relates to a circuit board which comprises a circuit substrate, an ink layer containing pure metal and an electromagnetic shielding structure, wherein the circuit substrate comprises an outer conducting circuit layer and a first insulating layer, which are in contact with each other; the outer conducting circuit layer is formed on one side of the first insulating layer and comprises a grounding circuit; open holes are formed in the first insulating layer to expose the grounding circuit; the ink layer containing the pure metal is formed on the surface, which is far from the outer conducting circuit layer, of the first insulating layer and the surface of the grounding circuit exposed out of the open holes; the grounding circuit is electrically connected with the electromagnetic shielding structure through the pure metal in the ink layer. The invention further provides a circuit board manufacturing method.

The invention relates to a modular PCB testing jig. The modular PCB testing jig comprises a testing module, a pin plate module, a supporting plate module and a covering plate module. The testing module comprises a testing platform, a support, a counter, a control board and a testing instrument. The pin plate module comprises a base, a pin plate, a sponge pad and a lower surrounding frame, wherein detection pins, spacers and springs are arranged on the pin plate, the base plate is provided with an air exhaust hole communicated with a vacuum extraction assembly, and the lower surrounding frame and the pin plate form a first containing cavity. The supporting plate module comprises a supporting plate, a sponge pad, a counter contact, an upper surrounding frame assembly, wherein the supporting plate is arranged in the first containing cavity, the upper surrounding frame assembly and the supporting plate define a second containing cavity for containing a PCB, and the supporting plate is provided with pin holes. The upper end faces of the pin plate and the supporting plate are both provided with a layer of copper foil. The covering plate module comprises an air cylinder and a cover plate fixed to a piston rod of the air cylinder, and pressing rods and a counter contact touch pin are arranged at the lower end of the cover plate. The modular PCB testing jig is compact in structure, convenient to maintain, accurate in test, high in automatic degree and capable of meeting the demand for large-scale test.

The invention provides an IPS-type In Cell touch display panel and a manufacturing method. The IPS-type In Cell touch display panel is provided with an insulating light resistance block (6) for insulation at the cross position of a touch transmitting electrode (4) and a touch receiving electrode (5). According to the method, a gray-scale mask etching process is adopted to manufacture the touch transmitting electrode (4), organic light resistance correspondingly located at the cross position of the touch transmitting electrode (4) and the touch receiving electrode (5) is retained to manufacture the insulating light resistance block (6), and the touch transmitting electrode (4) and the touch receiving electrode (5) are insulated through the insulating light resistance block (6). A film-coating and mask etching process special for manufacturing an insulation layer is omitted, accordingly a manufacturing process of the touch display panel is simplified, manufacturing cost is reduced, and production efficiency is improved. In addition, the touch transmitting electrode (4) and the touch receiving electrode (5) can further play an electromagnetic shielding role on a liquid crystal layer capacitor, and a specially-manufactured protection electrode is not needed.

The invention discloses a circuit board. The circuit board comprises a circuit substrate, a conductive polymeric membrane layer and a copper plating shielding layer, wherein the circuit substrate comprises a conductive circuit layer and a third insulating layer; the conductive circuit layer and the conduction circuit layer are formed on the two opposite sides of the third insulating layer; the conductive circuit layer comprises a signal circuit and a grounding circuit; the copper plating shielding layer is formed on the surface of the copper plating shielding layer in an electroplating way; a second conductive hole is formed in the third insulating layer; the grounding circuit is electrically connected to the copper plating shielding layer through the second conductive hole. The invention also provides a manufacturing method of the circuit board.

The invention discloses a preparation method of a black polyimide film with static electricity prevention and shielding functions. The preparation method comprises steps as follows: an additive and polyamide acid are adopted, wherein the additive accounts for 0.5%-5% of polyamide acid in weight; the additive comprises nano-nickel powder, carbon black and a coupling agent, and nano-nickel powder accounts for 1%-8% of the total quantity of the additive; the carbon black accounts for 90%-98% of the total quantity of the additive; the coupling agent accounts for 1%-2% of the total quantity of the additive; polyamide acid is obtained from diamine and dianhydride through polycondensation in a solvent; during synthesizing, the nano-nickel powder, the carbon black and the coupling agent are dissolved in the solvent firstly, then respective required reacting weights of diamine and dianhydride are calculated in an equal molar ratio, polyamide acid is obtained through synthesis, and a product is obtained through defoaming and film casting. The product has the static electricity prevention effect, the volume resistivity of the product is 10<4>omega*cm-10<9>omega*cm, and meanwhile, the product has the excellent electromagnetic shielding effect and can be applied to the electronic fields such as a high-end flexible circuit board and the like.

The invention discloses a snake-bone-turning-based bending cavity internal three-dimensional opto-acoustic endoscope and an imaging method thereof. The endoscope comprises an integral scanning head, asnake bone bending part, an insertion hose, a three-dimensional scanning part, a control handle and a joint part. An opto-acoustic scanning probe and an optical camera are integrated in the integralscanning head, the opto-acoustic probe achieves mechanical circular scanning and retracting through the three-dimensional scanning part, the snake bone bending part is connected with the integral scanning head and the insertion hose, under adjustment of the control handle, four-way bending of the integral scanning head is achieved, and the joint part is connected with a pulse laser and a main unit. According to the method, by means of snake bone turning, bending cavity internal three-dimensional opto-acoustic imaging under the guidance of video images is achieved. Accordingly, the snake-bone-turning-based bending cavity internal three-dimensional opto-acoustic imaging method and the endoscope thereof combine high-resolution opto-acoustic imaging with high-resolution optical imaging, and bymeans of snake bone turning, bending cavity internal surface high-definition video images and a three-dimensional structure, function and molecular images of cavity tissue are obtained.

The present invention provides an electrostatic precipitator, comprising an electrically charged unit and an electrostatic dust collection unit, and the electrostatic precipitator is characterized in that: the electrostatic dust collection unit adopts a spacer made from a metal material or an inorganic conductive material to keep a certain distance between dust collection plates and sheets. The air contact surface of the dust collection plates and sheets is made from an insulation material, so that adjacent dust collection plates and sheets may not be conducted. The spacer can be prepared by stamping molding of a metal plate such as an aluminum plate and a copper plate, also can be prepared by die-cast molding, metal bar pressing molding, and other manners, and an inorganic conductive material also can be used. Compared with a traditional electrostatic precipitator, electrostatic precipitator has the advantages of high efficiency, no arc discharge, low ozone and higher security.

The invention discloses a test system of the long-term stability of the input offset voltage of an operational amplifier. The operational amplifier to be tested is placed in the liquid oil body environment to protect the operational amplifier to be tested from being affected by fluctuations of an air medium; the constant temperature control is performed on an oil body and accordingly the influence of the temperature change on the test is eliminated; meanwhile the operational amplifier to be tested is arranged inside a metal box which is connected with the ground and accordingly the electromagnetic shielding effect on the operational amplifier to be tested is achieved; in addition, the operational amplifier to be tested and a peripheral resistor-capacitor form a feedback amplifier circuit and accordingly the measurement of the output voltage is accurate. Accordingly, the external influence is eliminated, the error is further reduced due to the measurement method, and accordingly the measured long-term stability of the input offset voltage is close to the real situation and the dependence on the staff is reduced due to the fact that the test process is achieved automatically.

The invention relates to a radar assembly packaging body. The radar assembly packaging body comprises a box cover and a box body, wherein the box cover has a metal layer arranged on the inner surfaceof the box cover, wherein a cavity is formed between the box cover and the box body; the box body comprises a first insulator, one or more chips, a second insulator, a third insulator, antennas and conductive circuits, wherein the first insulator is connected with the box cover; hole channels are formed in the first insulator; one ends of the hole channels are corresponding to the positions of thecorresponding antennas while the other ends are connected with the cavity; the one or more chips are arranged on the second insulator in an inversion manner and covered by the first insulator; and the antennas and the conductive circuits are arranged in the third insulator and pass through the second insulator to be connected with bonding pads of the corresponding chips, wherein the conductive circuits are exposed from the third insulator for realizing electric contact.

The invention discloses a preparation method of a wood-based sound insulating and electromagnetic shielding cross double-X lattice sandwich structure, which relates to the field of building materials.The structure is mainly composed of upper and lower coatings, upper and lower veneers, upper and lower fiber reinforced resin layers, upper and lower panels, a core layer and a filling material. Thelattice columns of the core layer are cross-distributed to constitute the basic elements of the cross double-X lattice sandwich structure, and the basic elements are distributed in the core layer according to a reasonable arrangement mode. The structure preparation method designed by the invention is reasonable, and the materials are green and environment-friendly. The panels have high stiffness.The core material is lighter and can increase the ability of the structure to withstand transverse shearing. The filling material and the surface layer have sound insulating and electromagnetic shielding functions, and structure and function integration is realized. The application of the preparation method in the field of wood structure buildings widens the utilization scope of wood resources andhas great significance to the effective utilization of wood resources.

The invention provides a noise-reduction protective apparatus for a power distribution transformer, and belongs to the technical field of the transformer. The noise-reduction protective apparatus comprises a side wall, a top plate, and a supporting beam, wherein the side wall comprises a foam concrete wall body and a PVC board from outside to inside in sequence; the outer side face of the foam concrete wall body is coated with a transparent waterproof material; the inner side face of the PVC board is coated with shielding coating; a gap is formed between the foam concrete wall body and the PVC board; a sealed hollow cavity is formed in the gap; the circumferential side of the sealed hollow cavity is filled with a thermal insulating material; the sealed hollow cavity is connected with a protective cavity through multiple threaded holes; the threaded holes are formed in a tilted manner; the threaded holes are connected with an air injection mechanism; the air injection mechanism comprises an air injection pipe which is connected with the threaded holes in a matching manner; the sealed hollow cavity is connected with an air supply mechanism; an air exhausting mechanism is arranged on the top plate; and a temperature monitoring module and a smog monitoring module are arranged in the protective cavity. The noise-reduction protection apparatus is good in shielding effect, capable of reducing outward propagation of noise, and capable of realizing effective fireproof and temperature-reducing effects.

The invention discloses a Hall gear position senor, which comprises an inner shell, a circuit board and Hall chips arranged on the circuit board, wherein the Hall chips are Hall integrated circuits IC and are tightly attached to the inner wall of the inner shell, the number of the Hall chips is the same as that of vehicle gear positions and the Hall chips are connected in parallel with the vehicle gear positions. Each Hall integrated circuit has three pins S1, S2 and S3, the pin S1 is connected with a power supply, the pin S2 is earthed, and the pin S3 is a signal output end. The sensor realizes point to point detection of gear-selecting gear positions, is accurate in performance, high in sensitivity, quick in response time, high in reliability, small in influence of environmental change, simple in structure, convenient in installation and long in service life, has shock-resistance, impact-resistance, electromagnetic interference-resistance, waterproof and dustproof capabilities, and is particularly suitable for monitoring gear positions in an automotive electrically-controlled mechanical automatic transmission and a pneumatic automatic gear box.

The invention relates to a photovoltaic inverter which comprises a cabinet body, a power module, a filter module, a transformer module, a control plate module, a circuit breaker and a contactor, wherein the power module is arranged in the cabinet body; a plurality of beams for supporting and fixing the power module, the filter module and the transformer module are arranged in the cabinet body; the transformer module is arranged at the lowest part in the cabinet body; the filter module, the contactor and the circuit breaker are arranged on the transformer module; the power module and the control plate module are arranged at the uppermost part in the cabinet body; the power module is arranged on a fixed panel of the power module; the lower end of the power module is provided with a heat radiator; the fixed panel of the power module is fixed to a fixed beam of the power module in the cabinet body; the control plate module is arranged in the front of the power module in the cabinet body; the filter module is arranged on the fixed beam of the filter module under the power module; the circuit breaker is arranged on an installation panel of the circuit breaker; the installation panel of the circuit breaker is arranged under the control plate module; the contactor is arranged on a copper plate installation panel; the copper plate installation panel is arranged under the installation panel of the circuit breaker; a copper plate is connected with the circuit breaker; the contactor is connected with the circuit breaker by a lead; and a ground lead copper plate is arranged on the copper plate installation panel.

The invention provides a glue spraying method of array camera modules. The method comprises the following steps of arranging a plurality of camera modules; and spraying glue around the plurality of camera modules by using multi-degree-of-freedom glue spraying equipment, wherein the multi-degree-of-freedom glue spraying equipment comprises a glue spraying head, adjusting a glue spraying angle of the glue spraying head according to the surrounding conditions of the plurality of camera modules, then moving the glue spraying head according to the glue spraying angle, and carrying out glue sprayingon to-be-sprayed surfaces of the plurality of camera modules. An assembling method of array camera modules and the multi-degree-of-freedom glue spraying equipment are further provided. According to the glue spraying equipment, the glue spraying method and the assembling method of array camera modules, the array camera modules can be subjected to vertical glue spraying and inclined glue spraying,and the angle of glue spraying can be adjusted.

The invention discloses a hydraulic turbine automatic governor control system based on computer control. The system comprises a computer which is connected with a single chip microcomputer controller through a data line. The computer is connected with a wireless radio frequency transceiver module through a GPRS network. The input end of the single chip microcomputer controller is electrically connected with the output ends of a power transmitter module, an external grid frequency monitoring module, a filtering module and a power supply. The output end of the single chip microcomputer controller is electrically connected with the input ends of a signal grounding module, a signal amplification module, a position monitoring module and a liquid level monitoring module. The single chip microcomputer controller is electrically connected with a database module and a dynamic simulation module. The output end of the signal amplification module is electrically connected with the input end of an electro-hydraulic servo valve. The system provided by the invention has the advantages that a computer can carry out remote control on a hydraulic turbine automatic governor; the operation of a hydraulic turbine can be monitored in real time; and the intelligence degree is high.

The invention provides a dielectric waveguide filter, which solves the problem that an existing dielectric waveguide filter is poor in strength due to structure thereof. The dielectric waveguide filter comprises a filter body. The filter body is provided with a radio-frequency connector and a filter dielectric block. The filter dielectric block comprises a plurality of dielectric single cavities and a plurality of coupling windows. The plurality of dielectric single cavities are connected in a head-to-tail manner in sequence through the coupling windows. Each coupling window is provided with more than one sensitive through hole in the middle. The dielectric waveguide filter can effectively adjust coupling amount of each coupling window to enable the strength of each coupling window to be higher, so that the overall strength of the dielectric waveguide filter is allowed to be higher; the structural strength is more reliable; processing process is allowed to be simpler and more convenient; the dielectric waveguide filter can better meet requirements of low insertion loss, high suppression and high power and the like of the filter, and meanwhile, meets development trend of miniaturization of the filter; and filter signals can be limited within the filter well and are isolated from the external space.

The invention provides a plastic package method and a package body prepared by the same. The plastic package method includes the following steps that: a product to be packaged comprises a carrier, wherein the carrier is provided with at least one chip, wherein the chips are connected with the carrier; a plastic package mold is provided, a plastic package groove is formed in the plastic package mold, a jig is provided, the shape of the jig is the same as the shape of the plastic package groove, the jig covers the inner surface of the plastic package groove, and a metal thin sheet is formed on the inner surface of the jig; a plastic package material is arranged, the product to be packaged is buckled to the plastic package groove, and a surface of the product to be packaged, which is providedwith the chips, face the interior of the plastic package groove; and plastic package is carried out, the plastic package material forms the plastic package body and covers the chips, so that the package body can be formed; and the plastic package mold is removed, and the jig is removed with the plastic package mold, and the metal thin sheet covers the surface of the plastic package body. With theplastic package method adopted, technique procedures can be decreased, and costs can be saved; and the metal thin sheet not only plays a role of electromagnetic shielding, but also can be used as a conductive layer; the metal thin sheet has a heat dissipation sheet function; and a metal pattern can be formed on the metal thin sheet.

The invention provides a seal protecting structure of an output terminal of a DCDC convertor, comprising a DCDC convertor and an output terminal, wherein the DCDC convertor is provided with an inner notch at the position where the output terminal is arranged, and an output terminal box is embedded in the inner notch; the output terminal box is a semi-closed box body formed by enclosing a base and three baffles, wherein one upper surface and the outer side of the semi-closed box body are opened; the base and the bottom of the inner notch on the DCDC convertor are fixed; the left side surface, the right side surface and the inner side surface of the inner notch are respectively shielded by the three baffles, and a through hole is arranged at the copper bar extending position which corresponds to the output terminal of the DCDC converter on each baffle; the output terminal extends into the output terminal box through the through hole and is connected with an external line cluster by a hold-down nut; an L-shaped bin cover is arranged above the inner notch of the DCDC convertor; and the open surfaces of the output terminal box are covered. The structure can protect and seal the output terminal by isolating the output part from the inside of the DC/DC system, thereby playing a role of electromagnetic shielding and reducing the space occupation.

The invention relates to a lightweight shell device for a transponder antenna. The lightweight shell device comprises a metal top cover, a metal box body, a non-metal bottom cover and a circular connector, wherein the metal top cover is arranged at one end of the metal box body and fixedly connected with the metal box body; the non-metal bottom cover is arranged at one end of the metal box body and fixedly connected with the metal box body, and the circular connector is arranged on the side face of the metal box body; and the metal box body takes light weight and rigid strength as optimizationobjectives, adopts a finite element method and takes the wall thickness of a light weight shell as a design parameter to carry out rigidity matching to obtain a wall thickness parameter. Compared with the prior art, the lightweight shell device has the advantages of light weight and the like on the premise of ensuring the rigidity.

The invention belongs to the field of track vehicle driving wheel testing, and particularly relates to a function and test integrated driving wheel torque calibration method. According to the method, a function and test integrated driving wheel is utilized. The function and test integrated driving wheel comprises a wheel hub which is formed by a flange, multiple wheel arms and a connecting disc which are connected from outside to inside in turn. One end, which is close to the external side of a vehicle, of the external edge of the flange is connected with a driving wheel fluted disc. At least m wheel arms are evenly distributed on the wheel hub. A self-powered test unit is integrated with the wheel hub structure to form the function and test integrated driving wheel, wherein the self-powered test unit is integrated with the driving wheel body to realize information acquisition. The self-powered test unit is sealed in the internal part of the function and test integrated driving wheel so that the technical problem that data transmission is influenced by muddy gravels and other complex environments in testing of the driving wheel can be solved.