48 results about "Electromagnetic transmission" patented technology

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.

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 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 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 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.

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 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 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.

A circuit board and a manufacturing method thereof, the method comprising providing a main board, the main board comprising a first base layer, a first circuit pattern layer and a second circuit pattern layer, the first circuit pattern layer being located in a current transmission area, the second circuit pattern layer being located in an electromagnetic transmission area, then providing a sub-board, the sub-board comprising a second base layer and a third circuit pattern layer, then pre-pressing the main board and the sub-board, so that the third circuit pattern layer is located on part of the second circuit pattern layer to form a laminated structure, then hot-pressing the main board and the sub-board, so that the second base layer is transformed from a glass state to a molten liquid state and flows towards the laminated structure to coat the laminated structure. The advantage of the present application is that after the sub-board is pressed on the main board, multiple electroplating is not required, thereby effectively shortening the production time.

A measuring device for characterizing a measurement object in a vacuum includes at least one inductive sensor having at least one transmitting coil for generating an alternating electromagnetic field, a receiving coil for detecting an impedance change, and a signal amplifier and / or a signal processing unit for evaluating measurement signals. The measuring device can be integrated in a vacuum system with minimal additional space requirements and enables a measurement with high accuracy and high spatial resolution with precise repeatability on a static measurement object and / or a measurement object guided past the measuring device. Both the transmitting and receiving coils as well as the signal amplifier and / or the signal processing unit are arranged outside a vacuum region. The transmitting and receiving coils can each be inserted into a capsule, and the capsules are configured as an integral part of a chamber wall of a vacuum chamber and project into the vacuum.

The application discloses a cable storage system for lunar soil / rock micro-disturbance drilling, which comprises a reel base lifting frame, the reel base lifting frame is fixedly connected with a soil / rock storage and auxiliary drilling system, a reel base lifting motor is arranged in the inner cavity of the reel base lifting frame and is fixedly connected with the reel base lifting frame, and the reel base lifting frame can drive the reel base to move vertically and axially; a first plane thrust bearing is arranged between a second reel and the reel base, the rotor of a reel driving motor is fixedly connected with the reel base, an electromagnetic transmission reversing element is fixedly connected with the shell of the reel driving motor, the current direction of the electromagnetic transmission reversing element is changed, the electromagnetic transmission reversing element can be connected with the first matching slot of the first reel or the second matching slot of the second reel under the action of magnetic force, and the purpose of single motor independently driving two reels is achieved.

The utility model relates to the technical field of power supply, and discloses a dual-power supply system, which comprises a main power supply module and a standby power supply module, the main power supply module is connected with the CPS controller and used for converting alternating current output by an internal coil system of the electromagnetic transmission mechanism into stable direct current suitable for working of the CPS controller and inputting the stable direct current into the CPS controller so as to supply power to the CPS controller; and the standby power supply module is respectively connected with the main power supply module and the CPS controller, and is used for converting external alternating current into stable direct current suitable for working of the CPS controller when the main power supply module is powered off, and inputting the stable direct current into the CPS controller so as to supply power to the CPS controller. According to the utility model, automatic switching and switching of the standby power supply module can be realized, and the CPS controller can work normally in any working state.

An optical construction includes optical stacks arranged across the construction and spaced apart from each other. Each of the optical stacks has a transmittance of at least 60% for at least one visible wavelength and includes one or more electrically conductive layers. The optical stacks are co-extensive with first and second antennas. Each of the electrically conductive layers defines a through opening aligned with at least one of the first and second antennas. For each of an s-polarized first incident signal incident on the optical construction in a first incident plane and a p-polarized second incident signal incident on the optical construction in a second incident plane orthogonal to the first incident plane, for at least one frequency in a range from 0.5 GHz to 10 GHz, and for incident angles of up to 40 degrees, the optical construction has a transmission coefficient of between 0 dB and −10 dB.

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.

A level determination system, for determining a level of a material interface in a tank, the level determination system comprising: a transceiver configured to generate, transmit, and receive electromagnetic signals; processing circuitry coupled to the transceiver, and configured to determine the filling level based on a timing relation between an electromagnetic transmit signal and an electromagnetic reflection signal resulting from reflection of the transmit signal at the material interface; and a signal propagation arrangement coupled to the transceiver, and configured to propagate the transmit signal from the transceiver towards the material interface and to propagate the reflection signal towards the transceiver, the signal propagation arrangement having a fluid absorbing surface portion, configured to absorb condensate.

The application discloses a cascaded super surface electromagnetic transmission modeling and analysis method based on a wave matrix and a cascaded super surface, belongs to the technical field of high-frequency communication and artificial electromagnetic super surface, and takes the wave matrix theory as the core. The cascaded structure contains a dielectric partition and n sheet admittance layers, the total electric field is the sum of the forward and backward propagation fields, the magnetic field expression is obtained by combining a 90-degree rotation matrix, an equivalent four-port network is obtained, the wave matrix is associated with the scattering and transmission matrix, the total wave matrix is obtained by combining the wave matrix of each layer, the isolation medium is introduced for correction, and the modeling is completed by solving the parameters. The cascaded super surface electromagnetic transmission modeling and analysis method based on the wave matrix and the cascaded super surface can form a building surface signal enhancement system framework, improve the electromagnetic wave transmission efficiency through the glass curtain wall, reduce the deployment and maintenance cost, endow the super surface with mechanical adaptability, enhance the compatibility with the glass curtain wall, and support large-scale deployment in complex scenes.

The application provides a high-load top plate for a radome top and a forming method, and belongs to the field of wireless communication.The application solves the problems of low strength, poor electromagnetic transmission performance and large weight of the existing radome top plate.The high-load top plate comprises a top plate body, the top plate body is a C sandwich structure, the top plate body is formed by resin infiltration and solidification, the top plate body comprises a first inner skin, a second inner skin, a first middle skin, a second middle skin, an outer skin, outer skin chopped felt and inner skin chopped felt, the outer skin chopped felt, the outer skin, the first middle skin, the second middle skin, the first inner skin, the second inner skin and the inner skin chopped felt are sequentially arranged layer by layer from top to bottom, three-dimensional fabric is arranged between the outer skin and the first middle skin and between the second middle skin and the first inner skin, and the three-dimensional fabric is formed by a thermosetting resin vacuum-assisted forming.The high-load top plate is mainly used for the radome top.

The invention relates to the technical field of gas detection control, in particular to an anti-electromagnetic interference wireless gas detection alarm method for a working environment, which comprises the following steps of: analyzing associated characteristics of equipment operation and electromagnetic interference by periodically collecting start-stop signals of working equipment and electromagnetic interference parameters; and dividing anti-interference transmission sub-time periods in the detection period. Three transmission types of stable transmission, fluctuation transmission and fault-tolerant transmission are determined based on the interference influence degree, and differential transmission modes are configured in combination with the priorities of detection signals. The system monitors electromagnetic transmission parameters in real time, dynamically adjusts an anti-interference compensation strategy, and starts an early warning mechanism when signal transmission is abnormal. According to the invention, active sensing and self-adaptive protection of dynamic electromagnetic interference are realized, and the communication reliability and alarm accuracy of a gas detection system in a complex industrial environment are remarkably improved.

The invention discloses a data transmission while drilling method, equipment, a system and an electrical method while drilling, which are applied to the technical fields of well drilling, geophysics and electromagnetic transmission. In order to solve the problems that an existing while-drilling data transmission technology is low in transmission rate and cannot meet the real-time requirements of intelligent drilling and while-drilling geophysical GWD technology development for mass data, the invention provides a while-drilling transmission method which comprises a while-drilling electromagnetic waveguide wireless transmission method, a cableless wired transmission method and an insulated wired transmission method. The invention also provides a manufacturing method of transmission equipment such as an electromagnetic waveguide structure drill rod and an insulated wired structure drill rod, and provides a system connection and operation method. The technical bottlenecks of intelligent drilling and while-drilling geophysical mass data well-ground real-time communication are broken through; and the technical blank of the while-drilling geoelectric method is filled.

The invention relates to a measuring device for characterizing a measurement object in a vacuum by means of an electromagnetic transmission-type inductive sensor, said measuring device comprising at least one inductive sensor, the inductive sensor has at least one transmitting coil for generating an alternating electromagnetic field, a receiving coil for detecting a change in impedance, and a signal amplifier and / or a signal processing unit for evaluating a measurement signal. The transmitting coil and the receiving coil and the signal amplifier and / or the signal processing unit are arranged outside the vacuum region, the transmitting coil and the receiving coil can be introduced into the capsule, and the capsule is configured as an integral component of a cavity wall of the vacuum chamber and protrudes into the vacuum, and the cavity wall isolates the vacuum region from the atmosphere side.

A sensor for measuring a pH value of a measuring liquid includes: a sensor element including a surface adapted to the measuring liquid; a radiation source configured to emit electromagnetic transmission radiation to the sensor element, wherein at least a portion of the transmission radiation is converted into measurement radiation by reflection and / or scattering in a region of the surface; a radiation receiver configured to receive the measurement radiation and convert it into electrical signals; and a measuring circuit configured to determine the pH value from signals, wherein a wavelength of at least a portion of the transmission radiation generates charge carriers in at least a surface region or a near-surface region of the surface of the sensor element as to effect a photoelectrochemical reaction with formation of hydrogen at the surface.

The invention discloses a cascading metasurface electromagnetic transmission modeling and analysis method based on a wave matrix and a cascading metasurface, and belongs to the technical field of high-frequency communication and artificial electromagnetic metasurs.The method takes the wave matrix theory as the core, a cascading structure comprises a dielectric partition plate and n slice admittance layers, the total electric field is the sum of a forward propagation field and a reverse propagation field, a magnetic field expression is obtained by combining a 90-degree rotation matrix, a four-port network is equivalent, a wave matrix is associated with a scattering matrix and a transmission matrix, wave matrixes of all layers are combined to obtain a total wave matrix, isolation medium correction is introduced, parameters are solved, and modeling is completed. By adopting the wave matrix-based cascaded metasurface electromagnetic transmission modeling and analysis method and the cascaded metasurface, a cross-building surface signal enhancement system framework can be formed; the transmission efficiency of electromagnetic waves penetrating through the glass curtain wall is improved; the deployment and maintenance cost is reduced; and the metasurface is endowed with mechanical adaptability, compatibility with a glass curtain wall is enhanced, and large-scale deployment in a complex scene is supported.

An objective of the present invention for solving the conventional problems described above is to provide a geophysical exploration apparatus which is mounted on a geophysical and drilling exploration robot to perform geophysical exploration unmanned and / or remotely. In order to achieve the above objective, the geophysical exploration apparatus according to the present invention comprises: an electric exploration unit which measures the electrical resistivity of a seabed stratum by injecting a current into the stratum through a plurality of electrodes spaced apart from each other in a cable installed on the seabed; an electromagnetic exploration unit for analyzing electromagnetic characteristics of the seabed stratum through an electromagnetic transmission unit installed in the robot to generate an electromagnetic field and an electromagnetic reception unit installed in the cable to receive the generated electromagnetic field; and an elastic wave exploration unit whereby the structure of the seabed stratum is analyzed when an elastic wave reception unit disposed in the cable receives an elastic wave generated when the robot performs drilling work or an elastic wave generated by a separate elastic wave transmission unit.

The present application relates to a kind of transmission passband switchable periodic electromagnetic structure between P wave band and C wave band, it is related to radar wave-transparent technology field, including the controllable array layer being formed by multiple groups of basic units along several periodic arrays and the medium layer being pasted below controllable array layer, basic unit is composed of square ring type metal patch, several switching diodes and inductive device, switching diode and inductive device are spaced apart and welded in the gap of metal patch, the equivalent electromagnetic parameter of basic unit is changed to realize the electrically controlled switching of passband, the electromagnetic transmission performance that the present application has can realize the quick switching of electromagnetic transmission passband between P wave band and C wave band, the advantages that large-angle incident electromagnetic wave has good frequency selectivity function.