115 results about "Bidirectional coupling" patented technology

An interactive coupling numerical simulation method for a molding temperature field of a composite autoclave comprises the following steps: building a heat flow calculation model to obtain a flow field and a fluid temperature field; building a curing molding calculation model to obtain a solid temperature field formed by a composite member and a molding die; performing temperature interaction based on iterative calculation of the heat flow calculation model and iterative calculation of the curing molding calculation model to realize temperature coupling between a fluid and a solid. According to the interactive coupling numerical simulation method, impacts on an airflow field from a die temperature field and a member temperature field are taken into consideration, iterative-step-based bidirectional coupling analysis is adopted, data interaction between the solid temperature field and the airflow field is arranged in each iterative step, and the strong coupling function between the solid temperature field and the airflow field is drawn into consideration, so that the problem of deviation of the temperature field in the background art is effectively solved, the reliability of simulated results is improved, the simulation better conforms to the reality, and a foundation is laid for follow-up stress and strain analysis.

The invention discloses a radio frequency transmitting circuit, comprising a radio frequency transmitter, an antenna switch and an antenna. A bidirectional coupler and an antenna tuner are arranged between the antenna switch and the antenna. The bidirectional coupler comprises a directional coupler and a switch, and forward or reverse transmission power is detected by switching the switch. The directional coupler is provided with a plurality of connected coupling lines, which are respectively located at any one or more positions of the upper side, the lower side, the outer side and the inner side of a main signal line. The bidirectional coupler is both used for detecting the transmitting power and is used for detecting the reflected power and outputting a detection value to the radio frequency transmitter. The radio frequency transmitter is both used for calibrating the transmitting power and is used for adjusting the input impedance of the antenna to realize the impedance matching of the antenna. The invention further discloses a bidirectional coupler, which has the advantages of simple structure, small volume, low cost, and easy integration with the manufacturing process of integrated circuits. The invention further discloses a directional coupler, which has high coupling degree and low insertion loss.

The invention discloses a method for predicting a numerical value of a transient fluid-solid coupling characteristic, and belongs to the technical field relevant to the mechanical flow induced vibration of pumps. The method mainly comprises the following three steps: calculating the transient fluid-solid coupling of an one-way and a bidirectional total fluid fields; measuring and processing the vibration data of a rotor; and comparing a predication result of the numerical value of the transient fluid-solid coupling with an experimental result. An coupling method can be selected flexibly. When the structure deformation quantity is not clear, the one-way coupling analysis is carried out firstly; if the predicted structure deformation has a big influence on the fluid field, the bidirectional coupling analysis is utilized. During the coupling calculation process, firstly, the transient fluid field calculation is carried out, and the load is added to a finite element model through interpolation calculation of an coupling interface so as to carry out a dynamic structural analysis. The convergence of data transmission of the coupling interface is judged, if the coupling calculation is not converged, fluid grids are recalculated according to the structural deformation, and then the coupling iteration for a time step is continued.

The invention provides a design method of a distributed water resource allocation model. The design method comprises the following steps: S1, dividing calculation units; s2, designing a topological relation; s3, designing information distribution; s4, designing a configuration module; and S5, designing a configuration rule. By means of modularization and integration thoughts, bidirectional coupling of a water resource allocation model and a distributed hydrological model SWAT is achieved, and the invention has the functions of natural-artificial water circulation dynamic mutual feedback simulation, water resource system and reasonable allocation simulation and the like; the problems that a traditional water resource allocation model neglects the dynamic mutual feedback effect between natural water circulation and artificial lateral branch circulation and cannot respond to the influence of dynamic changes of production and confluence on water resource allocation in real time are solved, and the accuracy of water resource system simulation and regulation and control is improved. The invention can be used as a powerful supporting tool for regional natural-artificial water circulation mutual feedback simulation and fine management of a water resource system.

The invention discloses an atmosphere-sea wave coupling system based on pipeline communication. The atmospheric mode is WRFV3, the sea wave mode is WW3, and the WW3 mode only exchanges data with the surface layer module in the WRFV3 mode. The WRFV3 mode drives the WW3 mode through a sea surface 10m wind field, and the WRFV3 mode provides environment variables of an atmosphere bottom layer, and theWW3 mode simulates the wave state of the sea surface, and feeds back the wave age parameter to the WRFV3 mode. According to the present invention, the bidirectional coupling is carried out on the medium-scale atmosphere mode WRFV3 and the third-generation sea wave mode WW3 by utilizing pipeline communication in the IPC technology of the Linux operating system. According to the technical scheme, the system reflects the dynamic coupling process and the thermal coupling process at the same time, the simulation effect of the coupling mode is improved, better transportability and expandability areachieved, and the forecasting level of the medium-scale atmospheric mode on the typhoon path and strength is effectively improved. The invention also discloses an operation method of the atmosphere-sea wave coupling system based on pipeline communication.

The invention relates to an electricity-gas interconnection system unit combination linear model and system considering electricity-to-gas coupling. According to the electricity-gas interconnection system, bidirectional coupling of the electricity-to-gas conversion technology and the gas turbine is considered, the unit combination problem of the gas interconnection system is studied, the lowest comprehensive operation cost of the whole system serves as the target, multiple safety constraints of an electric power system and a natural gas system are considered, and an electricity-gas interconnection system unit combination model is established and linearized to obtain a linear model. Through simulation calculation, the existing nonlinear model and the linear model are compared, the solving efficiency of the nonlinear model and the linear model is compared, meanwhile, the system operation cost and the operation state under the scenes of considering electricity-to-gas and not considering electricity-to-gas and electricity-to-gas are analyzed, and the result shows that the linear model improves the combination solving efficiency of the electricity-gas interconnection system unit, and the application of electricity-to-gas also helps to improve the economical efficiency of the electricity-gas hybrid connection system.

The invention relates to a bidirectional coupling device with same or different transmission characteristics and provides a transmission device part with same or different transmission characteristics and wide application range, in particular to a special bidirectional rotary transmission coupler with bidirectional transmission rotary kinetic energy of at least one first output/input end and at least one second output/input end. A transmission characteristic which can be used as a continuous rotary rotation difference and presents a special or adjustable flexibility value or toque can exist between the first output/input end and the second output/input end driven by the first output/input end, and another transmission characteristic which can be used as a continuous rotary rotation difference and presents a special or adjustable flexibility value or toque or a rigid transmission characteristic without the rotation difference can be selected as required to exist between the second output/input end and the first output/input end driven by the second output/input end. The coupling device is arranged at the output end of a rotary power source, an input side of an unstable impact load, between the rotary power source and a ballistic flywheel or a damping flywheel, between the ballistic flywheel or the damping flywheel and the load or used for transmitting the rotary kinetic energy of other machinery.

The invention describes the method and apparatus for enhancement of coupling efficiency in effective-ridge laterally-coupled surface-etched grating waveguide structures, where a slab waveguide has a sequence of the periodic parallel segmented trenches etched from its top surface, such that the segments of intact material having higher refractive index than that in the surrounding segments of periodic trenches form the effective ridges which confine the optical field in and around these ridges, on one hand, and provide bidirectional coupling for the confined modes experiencing Bragg reflection from the segments of the periodic trenches, on the other. The invention discloses the designs of the multiple effective ridge laterally coupled surface-etched grating waveguide structures, which enhances the coupling efficiency as compared to a conventional single effective ridge grating design because of an intended dilution of the lateral confinement caused by the multiple effective ridges, resulting in an increase of the optical mode's overlap with the surface etched grating formed everywhere outside the effective ridges.

A bidirectional flexible coupling device with variable transmission characteristics including one or multiple first input/out end and one or multiple second input/out end, indicating the transmission of specific or controllable flexibility or torque value when the first input/output end drives the second input/output end for transmission; and according to operation requirements, the transmission may be of specific or controllable flexibility or torque value or of rigid without revolution difference when the second input/output end drives the first input/output end.

The invention relates to a bidirectional coupling device with same or different transmission characteristics and aims to provide a transmission device part with same or different transmission characteristics and wide range of application, in particular a special bidirectional rotary transmission coupler with bidirectional transmission rotary kinetic energy of at least one first output/input end and at least one second output/input end. A transmission characteristic which can be used as a continuous rotary rotation difference and presents a special or adjustable flexibility value or toque can exist between the first output/input end and the second output/input end driven by the first output/input end, and another transmission characteristic which can be used as a continuous rotary rotation difference and presents a special or adjustable flexibility value or toque or a rigid transmission characteristic without the rotation difference can be selected as required to exist between the second output/input end and the first output/input end driven by the second output/input end. The coupling device is arranged at the output end of a rotary power source, an input side of an unstable impact load, between the rotary power source and a ballistic flywheel or a damping flywheel, between the ballistic flywheel or the damping flywheel and the load or for transmitting the rotary kinetic energy of other machines.

The invention discloses a bidirectional coupling detector and method based on a rectangular waveguide, and relates to the technical field of bidirectional coupling detectors. The bidirectional coupling detector comprises a detector which comprises a microwave circuit, and the bidirectional coupling detector also comprises a bidirectional waveguide coupler. The bidirectional waveguide coupler comprises a main cavity, the main cavity is provided with a main path straight-through waveguide, and the two ends of the main path straight-through waveguide are an input waveguide and an output waveguiderespectively. Coupling branches are arranged on the two sides of the main path straight-through waveguide. Each coupling branch is connected with the detector. The detector also comprises side cavities. The side cavities are each provided with at least two waveguide grooves. Each waveguide groove and the coupling branch corresponding to the side cavity form a coupling port and an isolation port.The bidirectional coupling detector based on a rectangular waveguide is high in integration level. The bidirectional coupler and the detector are designed in a combined mode in structure. The size isreduced, the installation complexity is reduced, and the assembly precision of the assembly is guaranteed.

The invention provides a coupling-degree-adjustable bidirectional coupler which comprises a main microstrip line and an auxiliary microstrip line which are parallel to each other, wherein one end of the main microstrip line is an input end, the other end of the main microstrip line is a straight-through end, the coupling microstrip line is perpendicular to the auxiliary microstrip line, one end of the coupling microstrip line is connected to the midpoint of the auxiliary microstrip line, and the other end of the coupling microstrip line forms a coupling end; two resistors a and b are arranged in the coupling microstrip line; and one side of the coupling microstrip line is provided with an impedance open-circuit line. Compared with a traditional structure, the symmetrical structure ensures that the same coupling degree can be realized at a coupling end regardless of the flow direction of signals; meanwhile, the coupling degree can be conveniently adjusted within a certain range through the design mode of the adjusting resistor, so that the requirements of different users are met, the coupler can be widely applied to transmitting and receiving circuits, meanwhile, flexible adjustment can be carried out, and the application range of the coupler is widened.

The invention discloses integrated EMI (electromagnetic interference) filter for optimizing grounded winding layout to improve noise suppression performance. The integrated EMI filter comprises an E-type magnetic core, a first I-type magnetic core, a second I-type magnetic core and two common-mode winding units of the same structure and symmetrically disposed on the two sides of the second I-type magnetic core. On the basis of the research of the characteristics of component integration and various coupling effects among the components as well as by optimizing the grounded winding layout of the integrated EMI filter, the integrated EMI filter with a small structure, complexity and processing difficulty is capable of effectively eliminating equivalent parallel capacitance of a common-mode inductor. By high-frequency performance comparison of reverse coupling, forward coupling and bidirectional coupling, the conclusion that the bidirectional coupling grounded winding structure can improve high-frequency common-mode noise suppression capacity to the greatest extent is obtained. At the mean time, an equivalent circuit is introduced for the quantitative analysis of a design process, and an accurate field simulation software is used for simulating filtering effects so as to finish the processing and test of the integrated EMI filter.

The invention discloses a symbolized permutation transfer entropy-based epileptic electroencephalogram bidirectional coupling analysis method. The epileptic electroencephalogram bidirectional couplinganalysis method comprises the following specific steps of firstly extracting coupling features of multi-channel epileptic electroencephalogram signals by adopting a method of multi-scale symbolized permutation transfer entropy, and selecting a proper scale and frequency band to construct an electroencephalogram synchronous matrix; and secondly, screening important channels during epileptic seizure based on a significance analysis method, and performing inter-channel bidirectional coupling analysis. In order to further research the overall synchronous relationship of the whole cerebral cortexarea, the multi-channel electroencephalogram signals are divided into 4 brain areas by the epileptic electroencephalogram bidirectional coupling analysis method, and synchronism analysis of multi-channel electroencephalogram signals is performed by using an S estimator under frequency bands of delta, theta, alpha and beta. The epileptic electroencephalogram bidirectional coupling analysis method improves the features of bidirectional coupling and synchronism of the epileptic electroencephalogram signals, and a more scientific and reasonable analysis method is made.

The invention provides an earth surface and pipe network distributed direct two-way coupling method, which comprises the steps of collecting hydrodynamic data of surface hydrology, and further comprises the following steps: generating an earth surface model and a pipe network model according to the hydrodynamic data of the surface hydrology, the earth surface model being an earth surface distributed hydrodynamic model; and on the basis of the surface model and the pipe network model, a coupling mode between the surface model and the pipe network model is constructed according to the actual composition of the urban drainage pipe network and the data coverage situation, and the coupling mode at least comprises physical coupling and concept coupling. The invention provides a novel distributed direct two-way coupling mode, namely a coupling mode of rainfall-earth surface-pipe network (Sewer), under the mode, the earth surface adopts a distributed hydrodynamic model, rainfall directly acts on earth surface grids, rainfall runoff generation and confluence and accumulated water flooding are calculated based on the unified earth surface grids, and therefore, the accuracy of the rainfall runoff generation and confluence and accumulated water flooding can be improved. Meanwhile, the surface model and the pipe network model are bidirectionally coupled.

The invention discloses a fluid-solid coupling method for the opening process of a pressure release valve of a pressure stabilizer. The fluid-solid coupling method comprises the following steps: establishing a simplified geometric model of a safety valve of the pressure stabilizer; respectively carrying out mesh generation on the solid region and the fluid region of the safety valve of the voltagestabilizer to obtain a mesh model of each part; controlling the stress state of the valve to be changed from a closed state to an open state through a user-defined function; carrying out steam flow characteristic calculation in the pressure stabilizer pressure release valve fluid domain grid model range, and carrying out solid mechanical vibration behavior calculation in the solid domain grid model range; achieving bidirectional coupling calculation of the same time step length of the mechanical behavior and the grid displacement through a fluid-solid coupling platform; and adopting a fluid-solid coupling platform is adopted to achieve dynamic flow field analysis inside the pressure release valve of the pressure stabilizer and mechanical behavior analysis of a solid region.

The invention discloses a ventilator blade fluid-solid coupling numerical analysis method, which comprises the following steps of respectively establishing the dynamic models and basic equations of afluid domain and a solid domain, the boundary conditions and a turbulence model, and substituting the equations into a fluid-solid coupling model flow chart. The vibration of the solid on the couplingboundary causes the movement of the fluid, and the pressure during the movement of the fluid reacts on the solid to form a coupling effect between the fluid and the solid, thereby establishing a bidirectional coupling model of the blade fluid-solid coupling problem. Compared with an existing blade fluid-solid coupling model, the blade fluid-solid coupling model is closer to reality, the effect offluid is not purely treated into the damping effect, but the fluid domain and the solid domain are regarded as a complete engineering problem.

The invention discloses a fluid-thermosetting coupling calculation method based on a physical neural network, relates to the technical field of fluid-thermosetting coupling mechanical application, and solves the problems that an existing method needs to consume a large amount of time and calculation resources, and there is no solution for complex coupling problems such as fluid-thermosetting coupling. One scheme is a scheme of separately establishing neural networks for a fluid domain and a solid domain and performing coupling calculation by adopting a continuity condition of an interface, and is called as a partition coupling calculation method; and the second scheme is a whole-field calculation scheme for establishing a set of neural network for a fluid domain and a solid domain to solve, and is called as a whole-field coupling calculation method. According to the method, discretization of a control equation is not needed, spatial discretization is carried out by replacing grid division with spatial sampling, and bidirectional coupling calculation of fluid mechanics, heat transfer theory and elastic mechanics can be realized. Therefore, more accurate physical field information of a solid domain and a fluid domain can be obtained.

The invention discloses a continuous adjustable nonresistive bidirectional coupler. The continuous adjustable nonresistive bidirectional coupler comprises a cavity as a carrier and signal processing portion of a whole product, connectors are installed at three surfaces of the cavity, a coupling primary rod is disposed in the cavity, and the two sides of the coupling primary rod are connected with the connectors; one end of a coupling secondary rod is connected with one of the connectors, the other end is connected with an adjustment rod, and an adjustment nut can realize adjustment of the adjustment rod; the coupling primary rod is a coaxial circular metal rod and presents step serial change; the coupling secondary rod is a circular metal rod, one end is provided with a circular hole and is enabled to have good elasticity through joint-cutting, closing and aging treatment, and the other end is provided with a threaded hole; and the adjustment rod is an insulation rod, a concentric-double-square-shaped opening is arranged in the middle, and the two ends of the adjustment rod are provided with threads. The continuous adjustable nonresistive bidirectional coupler is simple to assemble, stable in performance, realizes continuous adjustment and interchange between input and output and is free from coupling resistors.

The invention relates to a bidirectional coupling device with same or different transmission characteristics, which is a special bidirectional rotary transmission coupler with bidirectional transmission rotary kinetic energy of at least one first output/input end and at least one second output/input end. The coupling device is arranged at the output end of a rotary power source, an input side of an unstable impact load, between the rotary power source and a ballistic flywheel or a damping flywheel, between the ballistic flywheel or the damping flywheel and the load or for transmitting the rotary kinetic energy of other machines. The coupling device comprises at least two flexible coupling devices which flexibly interact with each other in the same rotating direction or reverse rotating directions or at least two flexible coupling devices which are combined with a friction-type damping flywheel or a non-contact damping flywheel so that the flexible coupling devices can input in the same rotating directions or the reverse rotating directions to drive the friction-type damping flywheel, the non-contact damping flywheel or another damping load device which has a set damping value or is provided with an operation mechanism device to adjust the damping value.

Bidirectional detection is performed with a suppressed increase in return loss at an output terminal. A bidirectional coupler includes a detection port, a main line connected to a first port and a second port, a sub-line, a termination circuit, a switch circuit that switches each of one end and another end of the sub-line to the termination circuit or the detection port, and a matching network disposed between the switch circuit and the detection port and including at least one of a first variable capacitor, a first variable inductor, or a first variable resistor. In a first mode for detecting a first signal, the switch circuit connects the one end of the sub-line to the detection port, and connects the other end of the sub-line to the termination circuit.