86 results about "Electromagnetic transmission" patented technology

The invention provides a comprehensive shielding signal cable and a manufacturing method thereof.The comprehensive shielding signal cable comprises a cable core and a protective layer wrapping the cable core, and the protective layer sequentially comprises a composite shielding layer and an outer sheath layer from inside to outside; the composite shielding layer comprises an iron-based amorphous nanocrystalline alloy layer, a 3D woven mesh layer and a conductive polymer coating which are sequentially arranged on the outer side of the cable core from inside to outside; through the gradient composite structure of the iron-based amorphous nanocrystalline alloy layer (low-frequency magnetic shielding), the 3D woven mesh layer (medium-frequency electromagnetic shielding) and the conductive polymer coating (high-frequency electric field shielding), the full-band shielding effectiveness is realized for the first time, meanwhile, the return loss is greatly reduced, the electromagnetic transmission performance and reliability of the cable are improved, and the service life of the cable is prolonged. And the structural stability of the cable is improved.

The utility model discloses an electromagnetic double clutch type power mechanism, which comprises a motor and an electromagnetic transmission mechanism, the structure of the electromagnetic transmission mechanism comprises a fixing ring, two electromagnetic coils are arranged on the fixing ring in parallel, an armature is fixedly arranged on the outer side of each of two opposite ends in the axial direction of the fixing ring, and a clutch outer core is axially fixed with the fixing ring. A fast-gear clutch assembly and a slow-gear clutch assembly are arranged in the clutch outer core side by side in a circumferential transmission mode, and an inner shifting structure acting on the fast-gear clutch assembly and the slow-gear clutch assembly is arranged in the clutch outer core. A fast gear and slow gear transmission set in transmission connection with the transmission shaft is arranged in the clutch outer core and used for achieving fast gear and slow gear switching transmission. And the electromagnetic force of the two electromagnetic coils realizes the axial sliding of the clutch outer core, so that the fast-gear clutch assembly and the slow-gear clutch assembly are staggered for separation and reunion.

The present invention relates to an external antenna kit. The kit includes a first module including a first electromagnetic shielding zone and a first electromagnetic transmission zone; a second module including a second electromagnetic shielding zone and attached to and communicatively connected with the first module; an external antenna configured separately from and electrically connected to the second module; and an antenna slot configured within the first electromagnetic transmission zone on the first module and having a structural geometry corresponding to that of the external antenna to provide for insertion of the external antenna.

The invention discloses a terahertz wave regulation and control method and system for inhomogeneous medium discrete data and a storage medium. The method comprises the following steps: establishing an electromagnetic model based on a multi-dimensional discrete data set; calculating the propagation trajectory of the terahertz wave in the medium by adopting a non-uniform medium ray tracing method; calculating transmission change characteristics of the terahertz wave according to the propagation trajectory of the terahertz wave in the medium; the transmission change characteristics comprise an attenuation characteristic, a phase shift characteristic and a polarization change characteristic of the terahertz wave in a transmission process; and performing terahertz wave regulation and control according to the attenuation characteristic and / or the phase shift characteristic and / or the polarization change characteristic of the terahertz wave. According to the method, the problem that the current modeling and electromagnetic calculation scheme is difficult to be suitable for electromagnetic transmission process calculation and terahertz wave regulation and control of the high-dimensional complex inhomogeneous medium is solved.

In order to provide a method for sustainably operating an electromagnetic transport system to move at least one mover, a first maximum value of a first trajectory for at least one movement quantity of the mover is determined. Additionally, a second maximum value of a second trajectory for said at least one movement quantity of the mover is determined. The first trajectory is selected as a target trajectory if the first maximum value is equal to or smaller than the second maximum value. The second trajectory is selected as a target trajectory, if the second maximum value is smaller than the first maximum value. The mover is moved in accordance with said target trajectory.

Power-split continuously variable transmission system for stepless transmission of drive power for an agricultural vehicle, with an input element for introducing torque and speed at least two switchable output elements for outputting torque and speed, an electromagnetic gear stage with an inner and a middle rotor and an outer stationary ring element, which are mounted concentrically to each other, a mechanical gear stage connected to the electromagnetic gear stage, wherein the outer ring element of the electromagnetic gear stage has electromagnetic coils to generate an electromagnetic field, and an output element is actuated solely by the electromagnetic gear stage, and a further output element is actuated by the electromagnetic gear stage and the mechanical gear stage, wherein the continuously variable transmission system is designed such that the same rotational speed is present between two output elements at a switching point in order to carry out a switching between them synchronously.

The invention relates to a method for operating a sensor system (2) of an ego-vehicle (1), in which the sensor system (2) emits electromagnetic transmission radiation (4) and sensor data (7) are generated as a received signal (5, 6) by detecting the transmission radiation (4) reflected by environmental objects (9) and / or by the ego-vehicle (1). According to the invention, it is provided that during the movement of the ego-vehicle (1), the mirror objects (12, 13) appearing in the sensor data (7) due to multiple reflections of the transmission radiation (4) from environmental objects (9) and / or the ego-vehicle (1) are used to assign the environmental objects (9) to target objects (10).

The invention belongs to the field of electromagnetic emission, and discloses an electromagnetic track emission system and method for friction coefficient full-period measurement. The electromagnetic track launching system comprises an electromagnetic track launching device, a pulse power system, a diagnosis system and a control system. According to the electromagnetic track launching system, full-launching-period measurement of the friction coefficient in an extreme electromagnetic environment can be achieved, and the system is used for monitoring the contact state between central tracks in each launching process and predicting the service life of a device; the full-emission period measurement of the local temperature of the guide rail can be realized; and full emission period measurement of contact pressure and contact resistance between the pivot rails is realized. According to the contact state between the guide rails in the launching process, the pretightening force of the guide rails or the size of the armature is adjusted, so that the service life of the guide rails is prolonged. The local temperature of the guide rail and the contact pressure between the pivot rails are monitored by utilizing the intrinsic physical characteristics of the Bragg grating, the reliability is high, the wavelength self-reference characteristic is realized, the absolute measurement can be realized, the temporal-spatial resolution is high, and the structure is compact.

The present invention relates to a method for performing a verification test on a radar level gauge system and a radar level gauge system for determining a filling level of a product in a storage tank, wherein the radar level gauge system is arranged to determine the filling level of the product in the storage tank. The method comprises the following steps: transmitting an electromagnetic transmission signal towards the surface of the product in the storage tank; receiving an electromagnetic reflection signal generated by reflection of the transmission signal at the surface of the product; forming a measurement representation based on the transmission signal and the reflection signal, the measurement representation comprising surface echo information indicating the filling level of the product; adding verification test echo information indicating a predefined verification test level to the measurement representation, thereby generating a modified measurement representation; processing the modified measurement representation to determine the verification test level based on the modified measurement representation; and providing a signal indicating the result of the processing.

The invention provides a composite board, an equipment shell and a manufacturing method of the composite board. The composite board comprises a main body area and a functional wave-transparent area, wherein the main body area comprises at least one first fiber composite material layer taking carbon fibers as reinforcing materials; the functional wave-transparent area comprises at least one second fiber composite material layer taking non-carbon fibers as reinforcing materials, and the non-carbon fibers are fiber materials with electromagnetic permeability; the main body area and the functional wave-transparent area are designed in a partitioned mode on the basis of functional requirements of electronic equipment, different fiber materials are laid according to preset partitioned patterns respectively, and the composite board with the continuous appearance is formed through one-time hot press forming technology. According to the composite board provided by the invention, high structural strength and high-end appearance continuity are kept, the wave-transparent requirement of a wireless signal is considered, and the shielding problem of a traditional carbon fiber or metal shell on an antenna signal is avoided, so that the communication performance is improved, and the integrated design of the structure and the function is realized.

The present invention provides a substrate-integrated notched mirror dielectric waveguide transmission structure and array thereof, belonging to the field of microwave engineering technology. The structure comprises a dielectric substrate, a metal ground plane and a metal plane attached to the lower surface of the dielectric substrate. Air holes or air slots are provided along one side of the dielectric substrate. The air holes or air slots divide the dielectric substrate into three parts, namely dielectric blocks on both sides and a dielectric strip in the middle. The metal plane is located on the upper surface of the dielectric block. The metal plane and the metal ground plane are connected to form a common ground. Compared with traditional dielectric waveguides, this dielectric waveguide transmission structure is easier to achieve planar integration. The integrated design makes the dielectric waveguide transmission structure simple, stable and low-loss. It is suitable for the integrated planar circuit board manufacturing process for millimeter wave terahertz and other frequency bands, and is used for electromagnetic transmission in millimeter wave terahertz and other frequency bands.

Disclosed are photocurable compositions and processes for fabricating 3D high-frequency dielectric materials for use as insulators in circuits, for example, high-performance RF components such as antennas, filters, transmission lines, or high-frequency interconnects for electromagnetic transmission. The high-frequency circuit structures exhibit very low dielectric loss at operating frequencies (1-60 GHz).

The invention discloses an MCU dual-port fixed side differential type signal output control method, and relates to the technical field of output signal control circuits, the MCU dual-port fixed side differential type signal output control method comprises an AC / DC module, a voltage stabilization module, an MCU, an optocoupler relay, a triode driving circuit and an electromagnetic relay, the first output end of the AC / DC module is in signal connection with the voltage stabilization module and the MCU in sequence, and the second output end of the AC / DC module is in signal connection with the optocoupler relay. The MCU is connected with an optocoupler relay through a dual-port signal, the optocoupler relay is in signal connection with the electromagnetic relay through a triode driving circuit, and the electromagnetic relay is connected with a second output end of the AC / DC module. The multi-isolation technology is adopted, and the reliability and safety of the circuit are guaranteed. According to the invention, a fixed side differential signal transmission mode is adopted, and the signal transmission stability is ensured. A signal-light-electricity-electromagnetic transmission mode is adopted, and stable and efficient signal transmission is guaranteed.

The receiver captures an electromagnetic transmission carrying a bauded signal, such as a transmission from an orbiting satellite, and processes it for Doppler shift analysis. The electromagnetic transmission is captured and a non-linear operation is performed to expose a cyclostationary feature of the captured transmission that will define a rate-line. This rate-line will exist at a frequency that is related to the bauded signal and Doppler shift relative to the motion of the transmitter to the receiver. The rate-line frequency is tracked in time to generate data indicative of a Doppler shift associated with the satellite and processed by an estimator fed by satellite propagator to supply positioning, navigation and timing services at the receiver output.

This invention provides a conformal antenna for insect-scale small biomimetic aircraft, relating to the field of biomimetic aircraft technology. In this invention, the body structure of the insect-scale small biomimetic aircraft includes legs, a tail, and wings; several conformal antennas are respectively configured around the legs, tail, and wings, operating in different frequency bands and receiving electromagnetic signal excitation from corresponding feed points. The insect biomimetic antenna is both a structural component of the organism and a communication component for electromagnetic transmission, essentially integrating multiple functions into one structure; multi-functional multiplexing is an effective way to achieve miniaturization and lightweighting of insect biomimetic aircraft. The application of the antenna described in this invention significantly improves the level of multi-frequency high-speed data transmission in biomimetic aircraft, while also endowing them with extremely high stealth capabilities.

The application relates to the field of electromagnetic field transmission and waveguide technology, and discloses a rectangular waveguide based on an electromagnetic Weyl metamaterial and a design method. 2d The structure parameters of the saddle-shaped metal unit with point group symmetry are adjusted to match the Weyl point frequency with a target screening frequency, the saddle-shaped metal units are periodically arranged in a three-dimensional direction to form a rectangular waveguide nesting structure, and the self-driven frequency selection function is realized; the CST full-wave simulation software is used to model the Weyl metamaterial waveguide, a limited period is set along the transmission direction of the Weyl metamaterial waveguide, and an x-y-z full-direction open boundary condition is adopted to simulate the electromagnetic transmission characteristics of the actual waveguide, and the electromagnetic field response of the waveguide basic mode is calculated, so that the self-driven frequency selection function is verified; based on the simulation verification result, the transmission mode of the Weyl metamaterial waveguide is analyzed, it is verified that the Weyl metamaterial waveguide is bounded by the Weyl frequency, and the frequency selection characteristic that the low-frequency signal is spontaneously suppressed and the high-frequency signal is conducted.

The invention relates to the technical field of signal transmission, and discloses an inspection well monitoring terminal low power consumption and data reliability guarantee method based on edge calculation, which comprises the following steps: collecting well lid vibration signals through a terminal built-in sensor, and extracting vibration dominant frequency, amplitude and instantaneous phase; constructing a well lid edge gap opening model reflecting the contact state of the well lid and the well seat by using the vibration amplitude, and deducing an effective electromagnetic transmission window proportion in combination with a preset radio frequency signal overflow threshold; calculating the number of retransmission times of the data packets meeting the transmission success probability according to the proportion, and calculating the optimal emission moment offset aiming at the maximum gap opening according to the vibration phase; and finally generating a discrete emission time sequence set and driving a radio frequency unit to send data. According to the invention, a micro gap generated by structural vibration is used as an electromagnetic transmission channel, phase-locked transmission is realized through deterministic calculation of an edge side, and the problem of communication reliability and energy efficiency balance of a low-power-consumption terminal in a strong-shielding and non-stationary channel environment is effectively solved.

The present invention relates to the technical field of magnetic-coupled wireless power transmission, and specifically discloses a full-space magnetic-coupled wireless local power transmission system and a magnetic energy regulation method thereof. The power transmission system includes N ≥ 3 three-dimensional orthogonal solid coils; each three-dimensional orthogonal solid coil includes an X-plane orthogonal coil, a Y-plane orthogonal coil, and a Z-plane orthogonal coil that are respectively distributed on the X, Y, and Z coordinate planes and whose geometric centers coincide with the origin of coordinates; any combination of an X-plane orthogonal coil, a Y-plane orthogonal coil, and a Z-plane orthogonal coil forms a transmitting mechanism for full-space electromagnetic transmission. The magnetic energy regulation method selects the optimal transmitting mechanism according to the position of the receiving coil, the magnitude and direction of the desired magnetic field. After determining the optimal transmitting mechanism, the amplitudes of the three excitation currents are set according to the solutions of the non-linear programming equation, and the phases of the three excitation currents are set to be in the same phase, which can dynamically regulate the spatial distribution of magnetic energy with the position and orientation of the terminal within the effective power transmission range, eliminate the influence brought by the dead zone space, achieve omnidirectional and full-angle power transmission, and minimize magnetic leakage.

The invention discloses a cable distribution parameter model construction and wave process analysis method, and relates to the technical field of the power industry, and the method comprises the steps: analyzing a cable structure to determine the hierarchy of the cable structure; constructing a distributed parameter model composed of unit length resistance, inductance, conductance and capacitance according to the ratio of the wavelength of the traveling wave to the length of the cable; an equation set is listed based on the Kirchhoff's law, and a transmission line partial differential equation describing the electromagnetic transmission characteristics of the cable is deduced; a refraction and reflection rule of traveling waves in a cable is analyzed, voltage and current refraction and reflection coefficients are deduced to determine traveling wave propagation behaviors, and in addition, time domain traveling wave fault distance measurement, fault distance measurement based on an improved head end reflection coefficient spectrum and insulation defect online monitoring based on active signal injection can be achieved in an extending mode. The method can eliminate the periodic distortion of the traditional frequency domain reflection spectrum, improves the fault distance measurement precision, achieves the real-time monitoring of the insulation state, and guarantees the safe and stable operation of the cable.

This invention discloses a power-off compensation mechanism for a two-dimensional electro-hydraulic servo valve directly driven by an ultrasonic motor. The mechanism includes a 2D valve assembly, an ultrasonic motor, an electromagnetic transmission assembly connecting the 2D valve assembly and the ultrasonic motor, and a motor cover. The 2D valve assembly includes an LVDT body, an LVDT sensing core, a left valve end cover, a left plug, a valve body, a valve sleeve, a valve core, a concentric ring, and a right plug. The electromagnetic transmission assembly includes a braking assembly and a motion transmission assembly. The braking assembly includes a right valve end cover, a coil, a retaining ring, and a return spring assembly. The motion transmission assembly includes a first coupling, an armature, and a second coupling. This invention uses a direct-drive ultrasonic motor to move the valve core via the motion transmission assembly. Energizing the braking assembly disconnects the valve core shaft from the motor shaft, solving the problem of the ultrasonic motor jamming due to power failure. This allows for independent and effective control of the valve core even during abnormal braking and when the motor stops rotating.

An apparatus and a method for inspecting a display device are provided. The apparatus includes an electromagnetic transfer unit including a first electromagnetic transfer unit extending in a first direction and a second electromagnetic transfer unit spaced apart from the first electromagnetic transfer unit and extending parallel to the first electromagnetic transfer unit, a stage, and a mechanical transfer unit, the stage is disposed on the electromagnetic transfer unit to support the display substrate, and the mechanical transfer unit is disposed between the first electromagnetic transfer unit and the second electromagnetic transfer unit and extends in a first direction.

The invention discloses a broadband angle insensitive nonlinear electromagnetic transmission modulation surface and a working method. The broadband angle insensitive nonlinear electromagnetic transmission modulation surface comprises a plurality of structural units which are periodically arranged; the structural unit comprises a metal layer and a dielectric substrate, the dielectric substrate is of a square structure, the metal layer is arranged on the dielectric substrate, a sawtooth structure, a square metal ring and a PIN diode are arranged in the metal layer, the square metal ring is arranged along the side length of the dielectric substrate, the sawtooth structure is arranged at one end of the outer side of the square metal ring, and the PIN diode is arranged in the square metal ring. Gaps are arranged between the square metal rings on two adjacent edges of the dielectric substrate, and the PIN diodes are installed in the gaps. By introducing the sawtooth structure, reasonable installation of the PIN diode and miniaturization of the unit size are both considered, adaptive response control over high-power electromagnetic waves and low-power signals can be achieved, transmission of the high-power electromagnetic waves is shielded to prevent the high-power electromagnetic waves from damaging a protected instrument circuit, and normal transmitting and receiving of the signals are guaranteed through transmission of the low-power electromagnetic waves.

The invention discloses a circuit board and a manufacturing method thereof, and the method comprises the steps: providing a main board which comprises a first base layer, a first line pattern layer and a second line pattern layer, the first line pattern layer is located in a current transmission region, the second line pattern layer is located in an electromagnetic transmission region, then providing an auxiliary board which comprises a second base layer and a third line pattern layer, and finally, carrying out the manufacturing of the circuit board. The main board and the auxiliary board are pre-pressed, so that the third circuit pattern layer is aligned with a part of the second circuit pattern layer to form a laminated structure, and then the main board and the auxiliary board are subjected to thermal compression bonding, so that the second base layer is converted from a glassy state into a molten liquid state, flows towards the direction close to the laminated structure and wraps the laminated structure. The scheme has the advantages that multiple times of electroplating are not needed after the lamination auxiliary board is laminated on the main board, so that the production time is effectively shortened.

The invention relates to the field of in-well electromagnetic geophysical exploration, in particular to an in-well fluid multi-scale polar distance electromagnetic emission system, which comprises a carrier plate made of a solid buoyancy material; the pull rope is arranged above the carrier plate; the first transmitting electrode is arranged below the carrier plate at a fixed distance and can be connected to a first end of an electromagnetic transmitter through a first wire; and the second emission electrode is arranged below the carrier plate at a variable specified distance and can be connected to the second end of the electromagnetic emitter through a second electric wire. The electromagnetic emission system disclosed by the invention is automatically adjusted along with the change of the water level of the underground fluid based on the buoyancy effect of the carrier plate, so that the problem of multi-scale electromagnetic emission in the high-reliability underground fluid is solved, and the intensity of electromagnetic signals directly emitted in the underground fluid is greatly improved; and a basic guarantee is provided for the quality of original data acquired by an inter-well and well-ground electromagnetic method. The invention further provides a using method of the in-well fluid multi-scale polar distance electromagnetic emission system.

The invention belongs to the technical field of radar calibration, and discloses a GNSS-based radar calibration system and method. According to the invention, the unmanned aerial vehicle carries GNSS equipment to dynamically fly, the three-dimensional space is segmented in combination with rays, and automatic obstacle avoidance and calibration point lifting are realized, so that an electromagnetic transmission channel is ensured to be barrier-free and cover the full range of radar beams, the integrity and adaptability of the calibration space are improved, and manual intervention is reduced. By integrating temperature, humidity, electromagnetic interference intensity and channel length, through finite difference conjoint analysis and a historical data mapping model, multivariable environmental influence compensation is realized, the problem of single environmental parameter compensation is solved, and systematic errors in a complex environment are remarkably reduced. Through cooperation of the environmental influence calibration module and the fixed-point test module, environmental errors are compensated first, then calibration results are verified, a closed-loop calibration process is formed, the number of times of repeated calibration is reduced, and the real-time performance of the system is improved.

The invention relates to a measuring device for characterizing a measurement object in a vacuum, wherein the measuring device comprises at least one inductive sensor, which has at least one transmitting coil for generating an alternating electromagnetic field and one receiving coil for detecting an impedance change, as well as a signal amplifier and / or a signal processing unit for evaluating the measurement signals.The object of the present invention is to provide a measuring device that can be integrated into a vacuum system with minimal additional space requirements and enables measurement with high accuracy and high spatial resolution with precise repeatability on a static and / or moving object past the measuring device, by arranging both the transmitting and receiving coils as well as the signal amplifier and / or the signal processing unit outside a vacuum region, wherein the transmitting and receiving coils can each be inserted into a capsule and the capsules are designed as an integral part of a chamber wall of a vacuum chamber and project into the vacuum, the chamber wall separating the vacuum region from an atmospheric side.

Apparatus for electromagnetic imaging and switch matrices are disclosed. The switch matrix can include a transmission port couplable to an RF measurement unitto receive an electromagnetic transmission signal, a reception port couplable to the RF measurement unit to transmit an electromagnetic reception signal, a plurality of transceiver ports couplable to transceivers positioned around a subject; and a plurality of PCB layers arranged in a stack, and a control port couplable to a controller for receiving at least one control signal. The PCB layers include a reception layer, a transmission layer, and at least four intermediate layers between the transmission layer and the reception layer. At least two intermediate layers are electrically grounded to provide radio frequency isolation between the transmission and reception layers. The transmission and reception layers includes a plurality of switches. The at least one control signal controls the plurality of switches in a plurality of operating states.

The application relates to the technical field of electromagnetic lock, in particular to a mechanical unlocking device of an electromagnetic lock, which comprises a lock body one, an electromagnetic transmission part is arranged in the lock body one, a lock tongue is movably arranged at the bottom of the electromagnetic transmission part, a lock body two is arranged on one side of the lock body one, a locking groove is arranged in the lock body two, an unlocking assembly is arranged, the unlocking assembly comprises a lock cylinder, an extrusion piece is fixedly connected to one side of the lock cylinder, a transmission piece is arranged at the bottom of the extrusion piece, an unlocking piece is arranged at the bottom of the transmission piece, and the unlocking piece is used for pushing the lock tongue out of the locking groove when the lock is mechanically unlocked; a reset piece is arranged in the lock body two, and the reset piece is used for resetting the unlocking piece; a secondary locking prevention assembly is arranged, and the secondary locking prevention assembly comprises an elastic piece; the electromagnetic lock mechanical unlocking device is provided with the extrusion piece matched with the transmission piece, the unlocking piece can be conveniently pushed to one side of the lock body one, the lock tongue is separated from the locking groove, and the purpose of unlocking the electromagnetic lock is achieved.

To provide a method and system for performing non-classical computations.SOLUTION: An optical system 200 use, as a whole, a plurality of spatially distinct optical trapping sites to trap a plurality of atoms, one or more electromagnetic delivery units 220 to apply electromagnetic energy to one or more atoms of the plurality to induce the atoms to adopt one or more superposition states of a first atomic state and a second atomic state, one or more entanglement units to quantum mechanically entangle at least a subset of the one or more atoms in the one or more superposition states with at least another atom of the plurality, and one or more readout optical units 230 to perform measurements of the superposition states to obtain the non-classical computation.SELECTED DRAWING: Figure 2

The invention discloses a variable-thickness interlayer radome design method based on a genetic algorithm, and belongs to the technical field of radar radomes. According to the design method, related knowledge of electromagnetism, machine learning and intelligent optimization is comprehensively utilized, and the technical problems that in the prior art, a design method of a variable-thickness interlayer antenna housing is complex, and the implementation target is single are solved. According to the design process of the method, various preconditions such as antenna electromagnetic characteristics, antenna housing structure characteristics and material parameters are fully considered, the whole electromagnetic transmission process is analyzed, meanwhile, multi-parameter optimization design is carried out for multiple optimization targets, and variable-thickness interlayer antenna housing design under the complex multi-target condition is achieved. According to the method, the design mode of the antenna housing can be unified, and the modeling process is simplified; and in combination with an optimization algorithm, multi-parameter and multi-target rapid optimization is realized, and the design difficulty is reduced.