134 results about "Wave coupling" patented technology

The invention discloses a rock burst ultra-deep hole blasting unloading wave absorption coupling prevention method for a steeply inclined coal seam, and belongs to the technical field of coal mining, and the method comprises the following steps: step 1, determining an unloading target rock stratum where a working face top plate and / or bottom plate stress concentration area is located in the steeply inclined coal seam; 2, determining a wave absorbing target rock stratum between the unloading target rock stratum and a roadway on the corresponding side of the working face of the steeply inclined coal seam; 3, arranging a plurality of unloading blast hole groups in the roadway; step 4, arranging a wave absorbing blast hole group at the position where the unloading blast hole group is arranged in the roadway; 5, all the wave absorbing blast holes are detonated, and all the unloading blast holes are detonated; and 6, after blasting is completed, the near-surface surrounding rock of the roadway on the corresponding side subjected to blasting serves as a supporting bearing layer for combined supporting. According to the invention, a three-level cooperative control mechanism of source unloading, propagation weakening and terminal bearing is realized, and steeply inclined coal seam clamping type roof and floor rock burst disasters are prevented fundamentally.

The invention relates to the technical field of non-linear regulation and control, in particular to a non-linear regulation and control method for a high-power narrow-linewidth multi-tone fiber laser system, which comprises the following steps: analyzing an influence mechanism of key parameters in the multi-tone fiber laser system on a non-linear effect; on the basis of the analyzed influence mechanism, establishing a nonlinear kinetic equation for describing the interaction of the pump wave, the stokes wave and the sound wave by combining a three-wave coupling theory, and forming a nonlinear propagation model; designing a Tab-DDPM generation network based on a nonlinear propagation model, and modeling a reverse mapping relation between a performance index and a design parameter by using a conditional diffusion mechanism to realize prediction of an optimal parameter; and inputting the optimal parameter into the nonlinear propagation model for verification, extracting an actually output performance index, and comparing the actually output performance index with a set target index to realize nonlinear performance evaluation and closed-loop optimization regulation and control. According to the method, the output capability and the signal fidelity of the high-power fiber laser system are effectively improved, and the method has good generalization capability.

The invention discloses a near-shore disaster-bearing body disaster-causing path tracing method based on a digital-analog experiment, and relates to the technical field of ocean dynamic disaster simulation, the near-shore disaster-bearing body disaster-causing path tracing method comprises the following steps: determining ocean dynamic disaster characteristics of a near-shore research area, integrating multi-source historical disaster data, real-time monitoring data and disaster-bearing body background data, and constructing a time-space association database; and based on a three-dimensional ocean and third-generation ocean wave mode, an offshore storm surge-ocean wave coupling numerical mode is established and verified. According to the method, a storm surge-sea wave coupling numerical mode is constructed, multi-disaster-type nonlinear interaction is comprehensively considered, an energy conservation equation is introduced to quantify generation, transmission and dissipation processes of disaster energy, limitation of a traditional single-disaster-type linear model is solved, real-time feedback of a disaster-bearing body three-dimensional dynamic model is combined, and the disaster-bearing body three-dimensional dynamic model is optimized. A closed energy-damage association mechanism is formed, the tracing accuracy of a disaster chain type propagation path is remarkably improved, and it is ensured that recognition of key nodes and dominant paths better conforms to physical reality.

The application discloses an analysis method for key local vibration of fluid-solid coupling bridges based on a substructure method, and relates to the technical field of bridge vibration analysis, and comprises the following steps: dividing a response key area in a bridge structure into substructures, performing static condensation, and obtaining a condensed substructure model; establishing a whole bridge-wave coupling model, and adopting a dynamic explicit solving strategy based on a coupling Euler-Lagrange method; independently solving the substructures by using a dynamic implicit method; coupling the substructures to the whole model by an interface coordination condition, and jointly calculating the whole explicit model and the local implicit model. The analysis method adopts an explicit method to process a strong nonlinear fluid-solid coupling process at a whole level, and establishes a fine substructure model through Guyan static condensation at a local area, so that the analysis precision is effectively improved.

The invention relates to a coupling structure for coupling electromagnetic waves into and / or out of a waveguide. The coupling structure comprises a substrate which comprises a pot-shaped, electrically hollow structure having an oval basic shape, wherein the electrically hollow structure is defined on one side of the substrate and is terminated on the opposite side of the substrate.

A Ka-band double-layer substrate integrated waveguide directional coupler belongs to the technical field of communication and comprises two layers of laminated dielectric substrates, a plurality of mounting holes are formed in the surfaces of the dielectric substrates and used for mounting waveguides; after the two layers of dielectric substrates are laminated, the surface between the outer surface and the dielectric substrates is coated with copper, and the wide wall part of the outer surface is provided with a mounting hole matched with the mounting hole of the dielectric substrate, a butt joint groove used for being in butt joint with the waveguide port, and a metalized through hole penetrating through the two layers of dielectric substrates. Coupling grooves which are regularly arranged are formed in the wide wall between the two layers of dielectric substrates in the electromagnetic wave transmission direction and used for coupling electromagnetic waves of one layer of dielectric substrate to the other layer of dielectric substrate. The feed structure adopts a waveguide-substrate integrated waveguide transition structure, the bandwidth is relatively wide, the waveguide joint is used as a feed end interface, and the transmission loss is relatively small. The two substrate integrated waveguide wide-wall coupling structures improve the miniaturization degree of the product.

The present invention relates to a test probe (10) for contactless measuring of the electromagnetic properties of a radio unit (20), in particular an antenna unit, the test probe (10) comprising a waveguide (1) for transmitting electromagnetic waves, a filler element (2) made of dielectric material and disposed in the waveguide (1), a lens element (3) for coupling electromagnetic waves into the waveguide (1), the lens element (3) being made of dielectric material and being disposed at one end of the waveguide (1), and a contact portion (4) for coupling out a measurement signal, the contact portion (4) being disposed at an end of the waveguide (1) opposite the lens element (3).

The invention discloses a split-band synthetic electromagnetic wave coupling device based on Rydberg atoms. The split-band synthetic electromagnetic wave coupling device comprises an energy collecting and processing case, a millimeter wave local oscillator source, a coaxial switch matrix, a surface plasma transmission line, a microwave local oscillator source, a laser generator and a photoelectric detector. The energy collecting and processing case comprises a plurality of frequency band antennas, a waveguide magic T, a waveguide adapter, a waveguide probe and a parabolic mirror, the frequency band antennas are connected with the corresponding coaxial switch matrix and the waveguide magic T after receiving incoming wave signals, and the coaxial switch matrix is connected to a plasma transmission line channel of the surface plasma transmission line; and the waveguide magic T is connected to the waveguide adapter, and is irradiated to the atomic gas chamber above the plasma transmission line channel through the waveguide probe and the parabolic reflector. And the laser generator irradiates the atomic gas chamber and then outputs to the photoelectric detector for detection. According to the invention, the problem of integration of a plurality of coupling channels is effectively solved, and meanwhile, efficient coupling of local oscillator signals, received incoming wave signals and the atomic gas chamber is met.

The invention provides a grating coupler and a design method thereof, relates to the technical field of optics, and aims to realize dynamic regulation and control of the grating coupler. The grating coupler comprises a substrate, a waveguide layer and a phase change material metasurface layer. The waveguide layer is disposed on the substrate. The phase change material metasurface layer is arranged on the side, away from the substrate, of the waveguide layer. Wherein the phase-change material metasurface layer comprises a plurality of protruding structures, so that filtering coupling and switching of the grating coupler on a target working wavelength are achieved.

This application provides a self-injection-locked narrow-linewidth laser with a quasi-continuous locking region, comprising: a semiconductor laser source for generating an initial linewidth laser and outputting it via end-face coupling; a photonic integrated microcavity chip including a bus waveguide and a microring resonator coupled to it via an evanescent wave, for receiving the initial linewidth laser and providing feedback light to the semiconductor laser through Rayleigh backscattering of the microring resonator to excite a self-injection-locking effect; the microring resonator is a compact folded waveguide microcavity with an ultra-low free spectral range, the free spectral range of which is less than a preset threshold, so that when the driving current of the semiconductor laser is changed for wavelength tuning, the self-injection-locking regions of adjacent resonant modes in the cavity physically overlap or are closely spliced ​​in the current tuning parameter space, so that the semiconductor laser can continuously transition between adjacent modes without experiencing permanent unlocking during continuous current tuning, forming a quasi-continuous locking region.

The application provides a visual micro-nano optical waveguide refractive index sensing system, and a hardware part comprises a nano fiber taper coupled fluorescent doped polymer microwire; the nano fiber taper coupled fluorescent doped polymer microwire is coupled by a nano fiber taper and a fluorescent doped polymer microwaveguide; the nano fiber taper is obtained by adopting a flame tapering method from a standard single-mode optical fiber; the fluorescent doped polymer microwaveguide is directly prepared by wire drawing from a mixed solution doped with a fluorescent dye; the nano fiber taper and the fluorescent doped polymer microwaveguide placed in a channel of an optical substrate jointly form an evanescent wave coupling structure; a signal analysis part enhances, edge extracts, smoothes and peak extracts a fluorescent image of the microwire through an image analysis algorithm, obtains an oscillation period of a fluorescent light path in the microwire under a current environment, establishes a response relationship between the light path period and the environmental refractive index, realizes direct real-time obtaining of environmental change conditions from optical images of a sensing unit shot by a camera, and thus obtains the change of the refractive index.

The invention discloses a dielectric-filled metamaterial filter. The dielectric-filled metamaterial filter comprises a waveguide, a plurality of metamaterial resonance units, an input port and an output port. The waveguide is filled with a dielectric material. The plurality of metamaterial resonance units are arranged in the waveguide, and each resonance unit in the plurality of metamaterial resonance units is electromagnetically coupled with at least one adjacent resonance unit. The input port is used for receiving input electromagnetic waves and coupling the input electromagnetic waves to the waveguide. The output port is used for receiving the output electromagnetic wave from the waveguide and transmitting the output electromagnetic wave to the outside of the dielectric-filled metamaterial filter; wherein the output electromagnetic wave is generated by filtering the input electromagnetic wave through the plurality of metamaterial resonance units.

This invention relates to a method for predicting ship maneuvering motions under high sea states, comprising the following steps: establishing a three-dimensional numerical model of ship-wave coupling under high sea states based on computational fluid dynamics; installing sensors on the ship to collect real-time motion data of the ship under high sea states, and preprocessing the collected data; extracting feature parameters related to the ship's six degrees of freedom motion based on the preprocessed data; using the feature parameters as input, constructing a ship maneuvering motion prediction model using a neural network model, the output of which is the prediction result of the ship's six degrees of freedom motion over a future period; training and validating the prediction model using historical data; inputting the real-time collected data into the trained prediction model to perform real-time prediction of the ship's six degrees of freedom motion; generating ship maneuvering suggestions based on the prediction results; and providing real-time feedback and correction to the model based on the comparison between actual operating data and the prediction results. This invention has the effects of improving prediction accuracy, ensuring ship safety, and improving prediction precision.

The application discloses a high-isolation plastic metalized waveguide slot antenna, which comprises a fixed back plate, a transmitting antenna, a transceiving isolation structure and a receiving antenna arranged on the fixed back plate. The transmitting antenna comprises one waveguide slot antenna unit and is used for transmitting electromagnetic signals. The transceiving isolation structure is arranged between the transmitting antenna and the receiving antenna and is used for inhibiting spatial wave coupling between the transmitting antenna and the receiving antenna. The receiving antenna comprises eight waveguide slot antenna units arranged according to predetermined positions and is used for receiving echo signals of a target. The application has the characteristics of high isolation while ensuring the gain requirement, and has the advantages of light weight and low cost.

The embodiment of the invention relates to an optical assembly of an integrated waveguide and an optical chip. According to some embodiments of the present application, a waveguide-integrated optical assembly includes: a first waveguide having a first end; the second waveguide is provided with a second end and is parallel to the first waveguide, and the second end of the second waveguide is coupled with the first end of the first waveguide; the optical device is located in the second waveguide, and the surface of at least one of the first end of the first waveguide and the second end of the second waveguide is gradually shrunk in the tail end direction so that light can enter the second waveguide from the first waveguide in an evanescent wave coupling mode. Another embodiment of the invention provides an optical chip. The optical chip comprises one or more optical assemblies. The optical assembly of the integrated waveguide and the optical chip provided by the embodiment of the invention can effectively solve the problems encountered in the traditional technology.

The present invention relates to a test probe (10) for contactless measurement of the electromagnetic properties of a radio unit (20), in particular an antenna unit, comprising a waveguide (1) for transmitting electromagnetic waves, a filling element (2) made of dielectric material arranged in the waveguide, a lens element (3) made of dielectric material arranged at the end of the waveguide (1) for coupling electromagnetic waves into the waveguide (1), and a contact section (4) arranged at an end of the waveguide opposite the lens element (3) for coupling out a measurement signal.

The invention discloses a bionic robotic fish cooperatively driven by rigid-flexible coupling pectoral fins and a variable-rigidity body, a left pectoral fin mechanism and a right pectoral fin mechanism are arranged in a mirror image manner and are mounted at an inclined included angle relative to a longitudinal neutral plane of a fish body, and branch fin bones in pectoral fins realize two-degree-of-freedom wing rocking and flapping movement by adopting coaxial gears and rope winding mechanisms; the pectoral fin on each side is provided with a plurality of fin rays, rigid and flexible joints are alternately matched with an elastic substrate and paired memory alloy wires for antagonistic actuation to realize controllable bending and traveling waves, and a hydrogel fin film is integrally poured outside the pectoral fin to form a continuous stress surface and ensure watertightness; the body part is driven by left and right pull wires which are wound and unwound in a differential mode and driving and driven gears to achieve bidirectional large-stroke bending, memory alloy actuators which are symmetrical up and down and hyperelastic wires are overlaid to regulate and control pretension and stress paths, and continuous adjustment of equivalent bending rigidity and damping is achieved. According to the structure, fin-body fusion, pectoral fin beat / wave coupling motion and body traveling wave propagation cooperative work are achieved under the compact size, and efficient propelling and sensitive maneuvering are both considered.

The invention discloses a high-isolation Ka-band millimeter wave coupler device and a calibration method thereof, and belongs to the technical field of coupler devices, and the high-isolation Ka-band millimeter wave coupler device comprises a coupler housing, an input pipeline, an output pipeline, a first coupling port and a second coupling port. The input pipeline and the output pipeline are respectively arranged at two ends of the coupler shell and are communicated with the coupler shell; the first coupling port and the second coupling port are arranged at the bottom end of the coupler shell and are communicated with the coupler shell; and a high-isolation switch and a digital front-end leakage elimination system which are in communication connection are arranged in the input pipeline. According to the invention, the high-isolation switch is arranged, the parasitic effect of the NMOS transistor is matched to a corresponding transmission network, and a high-Q-value inductance matching network design is adopted, so that high isolation is obtained under the condition that insertion loss is accepted, the isolation of the device at the Ka wave band reaches 33-51dB, and the requirement of high-efficiency transmission of the device at the Ka wave band is met.

A liquid crystal antenna array and communication device. The liquid crystal antenna array includes multiple antenna structures arranged in an array; each antenna structure includes a phase shifter layer, a radiating patch, and a first coupling layer; the phase shifter layer includes a fully phasor-adjustable phase shifter, a power splitter structure, and a first adjustable phase shifter; the output end of the fully phasor-adjustable phase shifter is coupled to the input end of the power splitter structure, the first adjustable phase shifter is coupled to the first output end of the power splitter structure, the first coupling structure couples the output end of the first adjustable phase shifter to the radiating patch, and the second coupling structure couples the electromagnetic wave output from the second output end of the power splitter structure to the radiating patch. The first coupling structure and the second coupling structure are orthogonal, and the phase adjustment range of the first adjustable phase shifter is smaller than the phase adjustment range of the fully phasor-adjustable phase shifter. Thus, the liquid crystal antenna array can perform polarization-reconfigurable beam scanning and achieve miniaturization.

The invention discloses a line sag measurement method and device based on traveling wave and temperature frequency wave velocity coupling, a medium and a product, and relates to the technical field of power transmission lines, and the method comprises the steps: calculating a modular domain wave velocity according to a traveling wave current signal in combination with a temperature frequency wave velocity coupling change function; based on the mode domain wave velocity, integration is carried out in combination with geometric characteristics of an oblique parabola, and a conductor oblique projectile traveling wave coupling coefficient is obtained; and establishing and deriving a sag expression of any point of the overhead conductor, and measuring to obtain the maximum sag of the overhead conductor in combination with the coupling coefficient. The invention provides a line sag measurement method and device based on traveling wave and temperature frequency wave velocity coupling, a medium and a product, the maximum sag position is locked through sag expression derivation, and calculation is completed in combination with the span, so that the maximum sag is obtained. The method can solve the problem of inaccurate sag calculation caused by the fact that an existing overhead conductor maximum sag calculation method does not consider the coupling influence of the temperature and the frequency on the traveling wave mode domain wave velocity and does not fully combine the geometrical characteristics of a conductor oblique parabola.

The embodiment of the invention relates to an optical assembly of an integrated waveguide and an optical chip. According to some embodiments of the present application, a waveguide-integrated optical assembly includes: a first waveguide having a first end; the second waveguide is provided with a second end and is parallel to the first waveguide, and the second end of the second waveguide is coupled with the first end of the first waveguide; the optical device is located in the second waveguide, and the surface of at least one of the first end of the first waveguide and the second end of the second waveguide is gradually shrunk in the tail end direction so that light can enter the second waveguide from the first waveguide in an evanescent wave coupling mode. Another embodiment of the invention provides an optical chip. The optical chip comprises one or more optical assemblies. The optical assembly of the integrated waveguide and the optical chip provided by the embodiment of the invention can effectively solve the problems encountered in the traditional technology.

The application belongs to the technical field and discloses a motor current harmonic suppression method and system based on a decoupling controller, wherein d-axis current harmonics and q-axis current harmonics are extracted through an adaptive complex vector decoupling controller; a conventional coupling compensation item is calculated according to an electric angular velocity ω; a delay coupling compensation item is calculated according to a switching frequency; adaptive decoupling gain is dynamically adjusted according to current harmonic tracking error; d-axis compensation voltage is added to d-axis actual voltage, and q-axis compensation voltage is added to q-axis actual voltage, so as to obtain corrected d-axis voltage instruction and q-axis voltage instruction. The application can decouple conventional coupling and sampling delay coupling of current harmonics, can guarantee the effectiveness of decoupling under various working conditions, reduces the influence of current harmonic coupling on compensation voltage accuracy, and thus improves the current harmonic suppression effect.

This invention discloses an electromagnetic coil winding detection system and method, belonging to the field of electromagnetic coil winding technology. It solves the problem in segmented electromagnetic coil windings of high-voltage high-frequency transformers where distributed parameter resonance and high-frequency harmonic coupling generate dynamic interlayer overvoltages, continuously inducing partial discharges, ultimately leading to winding breakdown and short circuits, and the cause of failure is difficult to trace. The system includes a data acquisition module, a data preprocessing module, a resonance feature extraction module, a parameter calculation module, a risk index calculation module, a product-level judgment module, and a batch statistical process control module. This invention collects impedance data of the electromagnetic coil at multiple frequency points and preprocesses it to extract resonance feature parameters. It then calculates the resonance amplification factor and harmonic excitation intensity by combining operating parameters, and further integrates the quality factor and frequency matching degree to generate a comprehensive risk index. Based on this index, the coil is graded, and batch data is statistically controlled to issue process warnings.

The invention discloses an analysis method for key local vibration of a fluid-structure interaction bridge based on a substructure method, and relates to the technical field of bridge vibration analysis, and the method comprises the following steps: dividing a response key region in a bridge structure into substructures, and carrying out static polycondensation to obtain a polycondensed substructure model; an integral bridge-wave coupling model is established, and a dynamic explicit solving strategy based on a coupling Euler-Lagrange method is adopted; independently solving the substructures by adopting a dynamic implicit method; and coupling the substructures into the overall model through an interface coordination condition, and carrying out joint calculation of the overall explicit model and the local implicit model. According to the analysis method, an explicit method is adopted to process the strong nonlinear fluid-solid coupling process on the overall level, a fine substructure model is established in a local area through Guyan static polycondensation, and the analysis precision is effectively improved.

A system including a mode coupler has at least one waveguide section connected between a mode coupler input and a mode coupler output. The waveguide section supports a set of guided coupler modes and a set of cutoff coupler modes, and has a transverse refractive index profile and a longitudinal refractive index profile. The transverse refractive index profile is adjusted by free-form optimization to yield a set of desired spacings between a set of propagation constants of the sets of coupler modes such that the longitudinal refractive index profile induces desired couplings between the guided coupler modes, while inhibiting undesired couplings between the guided coupler modes and the cutoff coupler modes, and undesired couplings between the guided coupler modes.

A coupling structure for coupling electromagnetic waves into and / or out of a waveguide is disclosed. The coupling structure comprises a substrate containing a pot-shaped, electrically hollow structure with an oval base, wherein the electrically hollow structure is defined on one side of the substrate and closed on the opposite side.

The invention discloses a bionic fluctuation coupling pump jet propulsion performance numerical calculation method, program and equipment and a storage medium, and belongs to the technical field of underwater bionic robots. According to the method, a physical model is established according to bionics and fish taxonomy principles, the external flow field range and the boundary condition type of the bionic propeller are determined, a structured grid and non-structured grid combination technology is adopted, the calculation accuracy is improved, and a dynamic grid method is adopted for simulation calculation; the numerical calculation method provided by the invention is based on combination of various grids, can more accurately control the initial state of the propeller, improves the accuracy of a simulation result, obtains a fin surface pressure distribution rule of the undulating fin in one period and a flow field evolution rule along with the motion of the undulating fin, and obtains a blade surface pressure distribution rule of the pump-jet rotor in one period at the same time; the propelling performance of the bionic fluctuation coupling pump jet is effectively predicted, and a theoretical foundation is laid for structural design optimization and motion control of the bionic fluctuation coupling pump jet propeller.

The invention discloses a compact all-metal high-gain filtering yagi antenna based on evanescent wave coupling, and belongs to the technical field of evanescent wave antennae, the compact all-metal high-gain filtering yagi antenna comprises a driving unit, a reflector, a connecting device and a coaxial probe, one end of the coaxial probe is located in the driving unit, and the other end of the coaxial probe penetrates through the bottom side of the driving unit and is located on the outer side of the driving unit; the connecting device is located between the driving unit and the reflector, and the two ends of the connecting device are connected with the driving unit and the reflector respectively. By means of the structure, the all-metal design is adopted, and the miniaturized high-gain design is achieved based on the evanescent wave coupling mechanism and the working principle of the yagi antenna; meanwhile, the antenna also has all-metal characteristics and out-of-band filtering response, and is suitable for miniaturized high-gain antenna design in high-power communication application.

A method for wind-ship fluid-structure interaction (FSI) in a digital twin environment is proposed. This method establishes a wind-ship coupling force and moment calculation model within the constructed digital twin environment. Based on the ship's attitude attributes, the wind force and moment are calculated, and dynamic formulas are further applied to simulate changes in the ship's velocity and angular velocity, thus achieving FSI. This invention fully considers the spatiotemporal changes in the environment and the impact of changes in ship attitude. The surface of the ship model is decomposed into triangular facets for calculation, ensuring the realism of the simulation results. It is applicable to any type of offshore floating body, such as buoys, offshore drilling platforms, or offshore wind turbines, where wind and wave coupling is significant.

Systems and methods to improve efficiency of in-coupling electromagnetic waves, such as in a visible light wavelength range, into a waveguide system arrangement are disclosed. The waveguide system includes: a display or an illumination assembly; a waveguide substrate; a polarization volume grating or a spin-dependent bifacial metasurface as in-coupler, which efficiently couples electromagnetic waves, such as in a visible light wavelength range, into the waveguide substrate. An out-coupler can couple the electromagnetic waves, such as in a visible light wavelength range, out of the waveguide substrate.