60 results about "Self shielding" patented technology

The utility model discloses a mobile cable irradiation work platform and an electron accelerator system, the mobile cable irradiation work platform comprises a platform base, a shielding device, a take-up and pay-off device and a wire guide wheel set, and the bottom of the platform base is provided with a mobile device; the shielding device comprises a shielding wall main body which is vertically arranged at the rear part of the platform base; the take-up and pay-off device is used for loading and unloading a cable, and the cable on the take-up and pay-off device is connected with the wire guide The wire guide wheel set guides a cable on the take-up and pay-off device to the rear side of the shielding wall body. The electron accelerator system comprises a shielding shell and an electron accelerator; when the platform base moves to an operation position, the shielding wall body and the shielding shell form a shielding cavity, and an electron beam outlet of the electron accelerator is aligned with a cable on the rear side of the shielding wall body in the shielding cavity. The self-shielding device can be matched with a miniaturized electron accelerator to form a self-shielding structure, the occupied space is greatly reduced, the installation is convenient, and the production efficiency can be improved.

The present invention relates to a shielded connector for automobiles in the field of electrical component technology, comprising a shielded connector body, a shielded wire, a transfer assembly, a metal mesh, and a terminal block. The transfer assembly is integrally sleeved on the shielding layer of the shielded wire end, and after the end of the shielded wire enters a housing cavity from a shielded wire port, the transfer assembly contacts the inner circumference of a shielding ring. The terminal block enters the housing cavity from the terminal port and is electrically connected to the end of the shielded wire. The metal mesh is sleeved outside the housing and is tied and contacted with the shielding ring and the conductive ring respectively by metal ties. Interference electrical signals from the shielding layer of the shielded wire are sequentially transferred to the conductive ring via the transfer assembly, the shielding ring, and the metal mesh, and then transferred to the ground via the grounding end face of the grounding block. The present invention transforms the metal housing structure of the prior art into an integrated structure of a resin material and a metal ring. The stability of the shielding ring and the conductive ring structure can effectively improve the shielding effect, and the housing and the shield cover of the prior art are cleverly integrated into one, thereby reducing the number of structural components of the shielded connector. At the same time, the resin material housing also significantly reduces the manufacturing cost of the shielded connector.

The utility model relates to an electric connector with a grounding strengthening function. The electric connector comprises an insulating body, and a terminal assembly and a shielding component which are arranged on the insulating body, the terminal assembly comprises a first terminal strip and a second terminal strip, the first terminal strip and the second terminal strip respectively comprise a first grounding terminal and a second grounding terminal, and the first grounding terminal and the second grounding terminal are respectively divided into a first section and a second section; the shielding component comprises a shielding sheet body, two paired first guide pins and two paired second guide pins, the two paired first guide pins and the two paired second guide pins extend from the shielding sheet body, the shielding sheet body is located between the first terminal strip and the second terminal strip, the two first guide pins abut against the first section and the second section of the first grounding terminal respectively, and the two second guide pins abut against the first section and the second section of the second grounding terminal respectively. Therefore, the effect of strengthening grounding by using the shielding sheet body can be achieved.

The utility model discloses a self-shielding neutron target device and a self-shielding neutron target system, the self-shielding neutron target device comprises a neutron target and a shielding housing, the neutron target comprises a target disc and a rotating part, the target disc is connected with the rotating part, the shielding housing is provided with a shielding chamber and a channel, the shielding chamber is used for packaging the target disc, and the rotating part passes through the channel. The shielding shell is further provided with a connecting end and an emitting end, the connecting end faces at least one part of the target disc, and the emitting end and the connecting end are located on the two opposite sides of the target disc. The shielding cavity can effectively package the target disc, generated neutrons and other radiation are limited in the shielding cavity, radiation leakage is avoided, the neutron target equipment is protected, operators can be prevented from being hurt by radiation, a channel for the rotating part to penetrate out is reserved in the shielding shell, and movement of the rotating part cannot be hindered while the sealing effect is achieved.

Provided in the present application are a self-shielding module and a communication apparatus. The communication apparatus comprises: a TRX board, at least one heat-dissipation structural member, and at least one self-shielding module, wherein a surface of each of the at least one self-shielding module comprises a metal shielding layer, the at least one self-shielding module is electrically connected to the TRX board, and the at least one heat dissipation structural member and the at least one self-shielding module are disposed on the same surface and / or different surfaces of the TRX board. The self-shielding module provided in the embodiments of the present application does not require a large-weight metal shielding cover, and does not require a large-sized enclosure frame; and a metal shielding layer can implement the signal shielding of power amplifier circuits, thereby making shielding modules of the power amplifier circuits miniaturized and lightweight, and increasing the effective layout areas of the power amplifier circuits.

A method of manufacturing a packaged acoustic wave component includes forming or providing a cap substrate. The method also includes forming a metal shield plate on a surface of the cap substrate. The cap substrate is attached to a device substrate that has an acoustic wave device on a surface thereof such that the metal shield plate is spaced from and faces the acoustic wave device and so that a peripheral metal wall extends between the device substrate and the metal plate. The metal shield plate and peripheral metal wall enclose and electrically shield the acoustic wave device.

A gradient coil system for use in a magnetic resonance device comprises a main coil having at least two main sub-coils for generating a gradient coil magnetic field in a target volume, a shielding coil having at least two shielding sub-coils for shielding the main coil, and a power supply system configured to adjust a plurality of electric currents. The main coil and the shielding coil are arranged coaxially along a z-axis, wherein the gradient coil magnetic field is aligned with the z-axis and varies along a gradient direction. The gradient coil system comprises N sub-coil groups, with N≥2, with each of the N sub-coil groups comprising a main sub-coil and a shielding sub-coil (3a-3d) connected in series. The power supply system is configured to adjust the electric current of each of the N sub-coil groups individually. The system provides strong gradient coil magnetic fields with improved switching time.

The present application relates to a kind of high-energy X-ray multilayer nested shielding device, belong to CT technical field, solve the problem that the high-energy ray test needs to be carried out in shielding plant in prior art, and the space occupied is large and test site is limited.The present application includes: fixed shielding tube, mobile shielding tube and intermediate scanning tube;The fixed shielding tube is provided with two, and is first fixed shielding tube and second fixed shielding tube respectively;The mobile shielding tube is symmetrically provided with two, including: first mobile shielding tube and second mobile shielding tube;First mobile shielding tube and second mobile shielding tube are respectively slidably connected in the inside of first fixed shielding tube and second fixed shielding tube;The intermediate scanning tube is sleeved in the inside of the mobile shielding tube, and two ends of the intermediate scanning tube are respectively connected with first fixed shielding tube and second fixed shielding tube fixedly.The present application realizes the self-shielding of high-energy ray.

This application discloses a method, apparatus, electronic device, and storage medium for calculating fuel sphere burnup, relating to the field of nuclear reactor physics and thermal calculation technology. The method includes: dividing fuel spheres into multiple batches based on their distribution; establishing neutron transport equations for each batch of fuel spheres; calculating the self-shielding factor of each batch of fuel spheres; calculating the neutron flux density of each region of the reactor core using the homogenized cross section of the pebble bed region and the homogenized cross section of the reflector layer region; calculating the power density of each region of the pebble bed based on the neutron flux density of each region of the reactor core; calculating the neutron flux density and power density of each batch of fuel spheres at the current reactor core power level based on the neutron flux density of the pebble bed region and the self-shielding factor of each batch of fuel spheres; and calculating the burnup depth of the corresponding batch of fuel spheres based on the power density of each batch of fuel spheres at the current reactor core power level, thereby improving the technical accuracy of fuel sphere burnup calculation in non-uniformly packed pebble bed reactors.

The invention provides a cable GIS terminal type test device, so as to construct a mechatronics test platform integrating self-shielding environment simulation, multi-attitude working condition reproduction, adaptive electrical connection and built-in nondestructive testing, and a Faraday cage effect is formed through a metal cabin of the device to replace a special shielding hall. Safe switching of the terminal between a horizontal working condition and a vertical working condition is realized by utilizing the attitude driving mechanism, and a comprehensive solution for efficiently and accurately completing a cable GIS terminal full-project type test in a common environment is finally realized through the sensor and the self-adaptive electric connection assembly.

A mobile cable irradiation operation platform (11) and an electronic accelerator system. The mobile cable irradiation operation platform (11) comprises a platform base (111), a shielding device (112), cable winding / unwinding devices (113), and a cable guide wheel set (114); a moving device is provided at the bottom of the platform base (111); the shielding device (112) comprises a shielding wall body (1121), and the shielding wall body (1121) is vertically arranged at the rear part of the platform base (111); the cable winding / unwinding devices (113) are configured to load and unload cables (1131), and the cables (1131) on the cable winding / unwinding devices (113) are connected to the cable guide wheel set (114); the cable guide wheel set (114) guides the cables (1131) on the cable winding / unwinding devices (113) to the rear side of the shielding wall body (1121). The electron accelerator system comprises a shielding housing (21) and an electron accelerator; when the platform base (111) moves to an operating position, the shielding wall body (1121) and the shielding housing (21) define a shielding cavity, and an electron beam outlet of the electron accelerator is aligned with the cables (1131) at the rear side of the shielding wall body (1121) inside the shielding cavity. The mobile cable irradiation operation platform (11) can work in conjunction with a miniaturized electron accelerator to form a self-shielding structure, thereby greatly reducing the occupied space, facilitating installation, and improving production efficiency.

The present document describes techniques for a magnetically self-shielded speaker box for a mobile device. The speaker box described herein includes a thin metal enclosure, thereby reducing or eliminating plastic components from the exterior enclosure of the speaker box. The metal of the enclosure has a high magnetic permeability to prevent penetration of a magnetic field generated by the speaker transducer within the exterior enclosure. Also, the exterior enclosure includes at least two enclosure portions that are joined together with a continuous welded seam. Accordingly, the speaker box described herein is a thin-walled, fully metal, high-permeability enclosure resulting in a smaller, self-shielded solution that reduces both (i) the total physical volume of the speaker box for a given internal speaker back volume and (ii) the spacing requirements to adjacent voice-coil-motor auto-focus camera modules.

The invention relates to the field of wind power control optimization, and particularly discloses a wind power master control PLC anti-interference method and system based on a self-shielding filtering algorithm, which abandons the traditional thought of adding hardware, and uses a current feedback signal homologous with an interference source (variable pitch driver) as an original reference. The method is characterized in that the signal is not directly used, but a software-defined shielding layer is constructed through unique interference feature extraction and purification steps, and pure interference features capable of accurately representing noise are intelligently extracted from an original reference signal, so that a high-quality virtual noise reference is generated. On the basis, the adaptive filtering algorithm can accurately estimate and eliminate actual interference components from a main signal (a blade angle signal). According to the method, on the premise of not increasing any hardware cost and system delay, real-time and high-precision anti-interference protection on key control signals is realized by utilizing the existing data flow in the PLC.

The application provides a cable GIS terminal type test device to construct a mechatronic test platform integrating self-shielding environment simulation, multi-posture working condition reproduction, self-adaptive electrical connection and built-in nondestructive testing. The device itself forms a Faraday cage effect by the metal cabin to replace a special shielding hall. The posture driving mechanism is used to realize safe switching of the terminal between horizontal and vertical working conditions. Through the sensor and self-adaptive electrical connection assembly, the comprehensive solution of efficiently and accurately completing the full item type test of the cable GIS terminal in the ordinary environment is realized.

Disclosed in the present invention is an electron accelerator system for cable irradiation. The electron accelerator system comprises a shielding housing, an electron accelerator, a cable irradiation operating platform, and a shielding door body, wherein the cable irradiation operating platform comprises at least two take-up and pay-off devices and a cable guide wheel set; the shielding door body and the shielding housing form a peripheral shielding cavity; cables on the take-up and pay-off devices are guided into the peripheral shielding cavity by means of the cable guide wheel set; two first shielding bodies are provided on the front side of a rear shell of the shielding housing, and two second shielding bodies are provided on the rear side of the shielding door body; the first shielding bodies and the second shielding bodies form a central shielding cavity; and an electron beam outlet of the electron accelerator is arranged in the central shielding cavity, and the cables on the take-up and pay-off devices are guided to the position below the electron beam outlet in the central shielding cavity by means of the cable guide wheel set. The present invention can cooperate with a miniaturized electron accelerator to form a self-shielding structure, thereby achieving a better shielding effect; in addition, the cable guide wheel set has a longer service life.

The utility model discloses an electron linear accelerator frame with a self-shielding device, which comprises a base, a sliding rail is arranged at the upper end of the base, a sliding seat is connected in the sliding rail in a sliding manner, and a moving mechanism for moving the sliding seat is arranged on the base; a bed body is fixedly mounted at the upper end of the sliding seat, a sliding cavity is formed in the upper end of the bed body, two protection plates are symmetrically arranged in the sliding cavity, and a rotating mechanism used for rotating the two protection plates is arranged in the bed body. According to the utility model, the stable and accurate rotation of the protection plate is realized, so that the radiation generated by the electron linear accelerator can be quickly and effectively shielded, and meanwhile, the rack is also provided with a flexible sliding seat design, so that the bed body can horizontally move to a required position, and accurate experiment or treatment operation can be conveniently carried out. The design not only improves the shielding efficiency and the cost effectiveness, but also enhances the flexibility and the operation convenience of the equipment.

The utility model relates to a self-shielding device for radiotherapy. The self-shielding device comprises an electronic flash therapy equipment base, the electronic flash therapy shell is rotationally assembled on the electronic flash therapy equipment base; the high-energy electron accelerator is arranged in the electron flash therapy shell and is used for providing pulse electron beams; the electronic flash therapy head is assembled at the end part of the electronic flash therapy shell, and the tail end of the electronic flash therapy head is used for irradiating the irradiation device; the irradiation device is located on the electronic flash therapy equipment base, and the guide rail is located between the electronic flash therapy equipment base and the electronic flash therapy shell and used for adjusting the position relation between the electronic flash therapy shell and the irradiation device; the electronic flash therapy head is ingenious in design and convenient to operate, the outer sleeve can move up and down along the inner sleeve, and animal fixing and electronic ray irradiation operation can be conveniently carried out.

The invention discloses a self-shielding coil design method based on a finite element method, relates to the technical field of high-precision magnetic field control, and solves the problems that when a compensation coil is designed in a closed magnetic shielding structure (such as a permalloy cylinder), the external stray magnetic field of the coil is coupled with the wall of the magnetic shielding cylinder to induce eddy current, so that the compensation magnetic field is distorted, and the background noise is increased. Meanwhile, high-precision magnetic field generation of a target area needs to be realized in a limited space. According to the technical scheme, finite element triangular mesh discretization is carried out on the surfaces of a main coil and a shielding coil; constructing a target function; and solving the minimum value of the function to obtain the optimal solution of the flow function psi of all grid nodes, calculating the current density of each triangular grid unit according to the optimal solution, and finally generating a closed-loop wire wiring structure of the main coil and the shielding coil along an equal-flow function line. The method is mainly used for scenes, such as a biological magnetic measurement system, magnetic resonance imaging and the like, which are limited in space and need to suppress external magnetic field coupling, and collaborative optimization of a high-precision target magnetic field and active self-shielding is realized.

This application relates to the field of microwave radio frequency technology, and in particular to a single-balanced mixer and system integrating second harmonic extraction and self-shielding functions. The single-balanced mixer includes: a branch-line coupler, a diode mixer unit, an RF input port, a local oscillator input port, and an intermediate frequency (IF) output port. The branch-line coupler includes two parallel transmission arms and two series transmission arms. The RF input port and the local oscillator input port are respectively connected to the input terminals of the branch-line coupler. The signal input terminal of the diode mixer unit is connected to the output terminal of the branch-line coupler, and the output terminal of the diode mixer unit is connected to the IF output port. A second harmonic extraction port is led out on the transmission line between the output terminal of the branch-line coupler and the signal input terminal of the diode mixer unit. By adopting this application, down-conversion of down-going reception and extraction of up-going second harmonic carrier are simultaneously achieved, solving the self-interference problem between transmission and reception, simplifying the circuit structure, and improving the RF energy utilization rate.

According to several embodiments, a high-frequency (HF) self-shielded inductor includes an outer shell having a dispersive or quasi-dispersive gap and two or more notches, an inner core disposed within the outer shell and having a dispersive or quasi-dispersive gap, coil windings disposed between the inner core and the outer shell, two end caps disposed at the opposing ends of the inner core and the outer shell, and a conductive shield disposed around the outer shell.

The invention discloses a double-layer spherical self-shielding uniform field coil and a design method, and relates to the field of electromagnetic design. The problems that due to the line width of an existing spherical coil, as the number of turns increases, the actually-machined coil can not meet spherical distribution constraint possibly, and consequently the actual result does not conform to theoretical analysis are solved. The method comprises the following steps: on the basis of a constructed double-layer spherical self-shielding uniform field coil, the magnitude of a magnetic field generated by an ith pair of coils in a space (x, y, z) is calculated according to the Bios-Savart law, and the magnetic field of the double-layer spherical self-shielding uniform field coil is obtained by accumulating the magnetic fields of the coils; describing the uniformity of the magnetic field through a relative error, describing the self-shielding effect of the coil through a ratio, and setting a non-uniform error and an attenuation coefficient constant threshold; a constrained nonlinear multi-objective optimization problem is constructed and is further converted into a single-objective optimization problem through a weighting mode, and optimization calculation is carried out based on a genetic algorithm.

The invention discloses an effective ray shielding structure, and relates to the technical field of ray shielding. According to the effective ray shielding structure, through scientific material selection and structural design, harmful X-rays generated when an electron accelerator works can be effectively blocked, harm of the rays to a human body and the environment is avoided, it is ensured that the self-shielding electron accelerator operates in a safe environment, reliable protection guarantee is provided for the irradiation process, and the service life of the self-shielding electron accelerator is prolonged. According to the effective ray shielding structure, an iron material and a lead material are mixed for use, and a sandwich biscuit type structure of stainless steel plate-lead plate-stainless steel plate is innovatively designed, so that the advantages of high density and good shielding effect of lead are utilized, and the problems that the lead material is soft, needs to be supported and is difficult to process are solved through the stainless steel plate; meanwhile, compared with the single use of concrete or iron materials, the combination greatly reduces the thickness of the shielding structure on the premise of ensuring the shielding effect, and gives consideration to both cost and flexibility.

The application discloses basalt fiber and PVDF composite material and a preparation method of Ag / Fe3O4 synergic modification, Ag nanoparticles and Fe3O4 nanoparticles are simultaneously modified on the basalt fiber, and the limitation of traditional single modification function is broken; and the modified basalt is used to prepare oriented PVDF composite material, so that the prepared PVDF composite material realizes synchronous improvement of piezoelectric performance and electromagnetic shielding performance, and can be directly used as a structural material of equipment shell, cabin, automobile and the like, realizes intelligent structure manufacturing of self-sensing and self-shielding, and has good application prospect and economic value as a new type of PVDF composite material product.

The invention relates to a micro-ring filter based on a polymer cladding. The micro-ring filter comprises an upper cladding, a micro-ring filter and a lower cladding, the upper cladding layer is a PDMS (Polydimethylsiloxane) polymer; the lower cladding is made of silicon dioxide; the micro-ring filter comprises an input grating coupler connected with an input light source, and the input light source sequentially passes through the input grating coupler, an input conical waveguide, a straight-through waveguide and a straight-through end output conical waveguide and is finally output from a straight-through end output grating coupler; and the straight waveguide is matched with an annular waveguide. Through the complementary design of the negative thermo-optical coefficient of the PDMS upper cladding and the positive thermo-optical coefficient of the silicon core layer, the self-shielding of the micro-ring resonant wavelength to the external temperature change is realized.

The application provides a high-voltage isolation ring structure of a gate driving circuit, which comprises a high-voltage field effect tube, a high-voltage isolation ring and a closed loop structure formed by a high-voltage transition zone between the high-voltage field effect tube and the high-voltage isolation ring; the inside of the closed loop structure is a high-end voltage area, and the outside is a low-end voltage area; a P-type shielding isolation ring is inserted between the high-voltage field effect tube and the high-end voltage area; a self-shielding isolation ring is nested on the P-type shielding isolation ring; a high-voltage interconnection parasitic resistance area is formed between the P-type shielding isolation rings, and the position of the self-shielding isolation ring embedded in the P-type shielding isolation ring and the distance between the two P-type shielding isolation rings can adjust the parasitic N-epi resistance of the high-voltage interconnection parasitic resistance area. The application realizes the complete isolation between the high-voltage field effect tube and the high-end voltage area by using the P-type shielding isolation ring, then nests the self-shielding isolation ring on the P-type shielding isolation ring, and realizes the semi-self-shielding isolation structure of the full-shielding isolation in part of the area and the self-shielding isolation in part of the area.

This application relates to the field of microwave radio frequency technology, and in particular to a single-balanced mixer and system integrating second harmonic extraction and self-shielding functions. The single-balanced mixer includes: a branch-line coupler, a diode mixer unit, an RF input port, a local oscillator input port, and an intermediate frequency (IF) output port. The branch-line coupler includes two parallel transmission arms and two series transmission arms. The RF input port and the local oscillator input port are respectively connected to the input terminals of the branch-line coupler. The signal input terminal of the diode mixer unit is connected to the output terminal of the branch-line coupler, and the output terminal of the diode mixer unit is connected to the IF output port. A second harmonic extraction port is led out on the transmission line between the output terminal of the branch-line coupler and the signal input terminal of the diode mixer unit. By adopting this application, down-conversion of down-going reception and extraction of up-going second harmonic carrier are simultaneously achieved, solving the self-interference problem between transmission and reception, simplifying the circuit structure, and improving the RF energy utilization rate.

The application provides a battery-powered plug-in electromagnetic flowmeter, comprising a probe shell, an inner magnetic conducting rod, an inner magnetic conducting rod insulating plug, a winding and electrode isolation plug, a winding and electrode lead-out line cavity, a winding lead-out lining flat washer and a winding tail magnetic conducting plug. The application adopts a T-shaped tee structure to establish a self-shielding stable magnetic circuit, ensuring measurement stability; adopts an insulating film plating method on the surface of a magnetic material to realize pipeline insulation and reduce excitation current; increases a conversion drive from magnetization to constant magnetism, measurement and magnetic energy recovery, and monitors excitation current by using a single-chip component, realizes seamless transition of the excitation magnetization stage and the constant magnetism stage, reduces resistance consumption in the excitation process, realizes that excitation power consumption is reduced to 15-20 uA under the condition of positive-negative excitation period measurement in a 2-second interval, and high precision with an R ratio of 1:500 can be obtained. The application has the characteristics of simple structure, energy saving and strong stability.

The invention relates to the technical field of radio frequency signal receiving and transmitting equipment, and discloses a low-cost miniaturized digital intermediate frequency receiving and transmitting front end based on an SIP (Session Initiation Protocol) module, which comprises a transmitting unit, a local oscillator unit and a receiving unit, the transmitting unit receives signal input from the digital signal processing unit for transmitting, and the receiving unit outputs the received signal to the digital signal processing unit; a transmitting intermediate frequency module and a transmitting SIP module are arranged in the transmitting unit. Through SIP modular design, a large number of radio frequency bare chips are integrated in a tube shell, the integration level of the assembly can be greatly improved, meanwhile, the self-shielding characteristic of metal ceramic BGA packaging is utilized, a metal partition wall occupying a large space in a traditional microwave assembly can be omitted, and the space of the assembly is greatly saved.