CN116933454A - Simulation method and device for cable crosstalk, computer equipment and storage medium - Google Patents
Simulation method and device for cable crosstalk, computer equipment and storage medium Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/18—Network design, e.g. design based on topological or interconnect aspects of utility systems, piping, heating ventilation air conditioning [HVAC] or cabling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/16—Cables, cable trees or wire harnesses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The application relates to a simulation method, a simulation device, computer equipment, a storage medium and a computer program product for cable crosstalk. The method comprises the following steps: in a CST cable operation environment, at least two node coordinates are respectively set for a first cable and a second cable, the node coordinates of each cable are connected to obtain a cable model, and a first attribute is set to construct a cable simulation model; the cable simulation model is imported into a CST microwave operation environment, and the physical simulation model is obtained by setting the attribute of the grounding plate based on the cable simulation model in the CST microwave operation environment; setting electromagnetic simulation parameters aiming at the joint simulation model; and introducing the joint simulation model into a CST design operation environment, accessing a signal source and a load to the joint simulation model in the CST design operation environment, and simulating the joint simulation model by changing simulation parameters to determine the cable crosstalk condition between two cables. By adopting the method, the manpower and material resources for cable crosstalk detection can be saved.
Description
Technical Field
The present application relates to the field of computer technology, and in particular, to a cable crosstalk simulation method, apparatus, computer device, storage medium, and computer program product.
Background
With the rapid development of science and technology, the number and variety of electronic devices have increased dramatically, and cables are connected to the electronic devices and provide a propagation path for power and signals, but at the same time, crosstalk between cables has seriously affected the performance of the electronic devices. Cable crosstalk is noise on a wire caused by coupling between two signal wires, mutual inductance between the signal wires and mutual capacitance, and the influence of cable crosstalk on equipment must be suppressed by a certain method.
The prior art often tests crosstalk conditions between cables by building cable objects and related circuits, for example, manufacturing cable objects and manufacturing test jigs with a certain distance and a certain height or manufacturing test jigs with dynamically adjustable distances, arranging interference cables and interfered cables on a panel according to a preset distance, and finally building related circuits to test cable crosstalk. But this approach requires significant human and physical resources to accomplish.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a simulation method, apparatus, computer device, computer readable storage medium, and computer program product for cable crosstalk that can save human and material resources.
In a first aspect, the present application provides a method for simulating cable crosstalk. The method comprises the following steps:
in a CST cable operation environment, at least two node coordinates are respectively set for a first cable and a second cable, the node coordinates of the first cable are connected to obtain a first cable model, and the coordinates of the second cable are connected to obtain a second cable model; setting a first attribute of the first cable model and the second cable model to construct a cable simulation model;
the cable simulation model is imported into a CST microwave operation environment, and the attribute of the grounding plate is set based on the cable simulation model in the CST microwave operation environment so as to perform model construction on the grounding plate, and a physical simulation model is obtained; setting electromagnetic simulation parameters for a joint simulation model comprising the entity simulation model and the cable simulation model;
and leading the joint simulation model into a CST design operation environment, accessing a signal source and a load to the joint simulation model in the CST design operation environment, simulating the joint simulation model by changing at least one of a second attribute of a first cable model, a second attribute of a second cable model, an attribute of a grounding plate or electromagnetic simulation parameters, respectively detecting electric signals of the first cable model and the second cable model during each simulation, and determining cable crosstalk conditions between the two cables based on the electric signals.
In one embodiment, the setting process of the first attribute includes: setting material properties, physical properties and electrical characteristics of the cable, wherein the material properties comprise at least one of dielectric constant, dielectric loss tangent, magnetic permeability or electrical conductivity; the physical properties include at least one of braid density, braid angle, cable conductor diameter, cable conductor shape, wire spacing, wire number, wire strand shape, or coating thickness of the cable; the electrical characteristic includes at least one of a transferred impedance or a shielding effectiveness.
In one embodiment, the property of the ground plane includes at least one of a material property or a dimension.
In one embodiment, the electromagnetic simulation parameters include at least one of: signal source frequency; the solving frequency and the solving precision of the entity simulation model and the cable simulation model; the distance between the two cable models and the ground plane plate; background and boundary conditions.
In one embodiment, before setting the electromagnetic simulation parameters for the joint simulation model including the entity simulation model and the cable simulation model, the method further includes: and respectively gridding the cable simulation model and the entity simulation model.
In one embodiment, the second attribute includes the first attribute and a cable length; the simulating the joint simulation model by changing at least one of a second attribute of the first cable model, a second attribute of the second cable model, an attribute of the ground plane, or the electromagnetic simulation parameter includes:
determining a plurality of simulation items corresponding to the cable model based on at least one of the second attribute of the first cable model or the second attribute of the second cable model, wherein the simulation items comprise at least one of ohmic loss, dielectric loss or maximum coupling distance of a cable wire bundle;
and in response to a selection operation for the plurality of simulation items, simulating the joint simulation model based on a default simulation item and the simulation item determined by the selection operation, wherein the default simulation item comprises cable lengths which are related to node coordinates of corresponding cables.
In a second aspect, the application further provides a simulation device for cable crosstalk. The device comprises:
the first simulation model construction module is used for setting at least two node coordinates for a first cable and a second cable respectively in a CST cable running environment, connecting the node coordinates of the first cable to obtain a first cable model, and connecting the coordinates of the second cable to obtain a second cable model; setting a first attribute of the first cable model and the second cable model to construct a cable simulation model;
The second simulation model construction module is used for guiding the cable simulation model into a CST microwave operation environment, setting the attribute of the grounding flat plate based on the cable simulation model in the CST microwave operation environment so as to perform model construction on the grounding flat plate and obtain a physical simulation model; setting electromagnetic simulation parameters for a joint simulation model comprising the entity simulation model and the cable simulation model;
the simulation module is used for leading the joint simulation model into a CST design operation environment, accessing a signal source and a load to the joint simulation model under the CST design operation environment, simulating the joint simulation model by changing at least one of a second attribute of a first cable model, a second attribute of a second cable model, an attribute of a grounding plate or electromagnetic simulation parameters, detecting electric signals of the first cable model and the second cable model respectively during each simulation, and determining cable crosstalk conditions between the two cables based on the electric signals.
In a third aspect, the present application also provides a computer device. The computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the simulation method of the cable crosstalk when executing the computer program.
In a fourth aspect, the present application also provides a computer-readable storage medium. The computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the simulation method of cable crosstalk described above.
In a fifth aspect, the present application also provides a computer program product. The computer program product comprises a computer program which, when executed by a processor, implements step C of the above-described simulation method of cable crosstalk.
The simulation method, the device, the computer equipment, the storage medium and the computer program product for cable crosstalk are provided with at least two node coordinates for a first cable and a second cable respectively in a CST cable operation environment, the first cable model and the second cable model can be obtained by connecting the corresponding node coordinates, then the two cable models are provided with a first attribute, namely, the cable simulation model is built in the CST cable operation environment, then the cable simulation model is led into the CST microwave operation environment, the physical simulation model is built in the CST microwave operation environment based on the attributes of a ground plane of the cable simulation model, electromagnetic simulation parameters are set for the joint simulation model comprising the physical simulation model and the cable simulation model, then the joint simulation model in the CST microwave operation environment is led into the CST design operation environment, a signal source and a load are accessed for the joint simulation model, at least one of the second attribute, the ground plane attribute and the electromagnetic simulation parameter of the cable is changed, the joint simulation model is simulated, the electrical signal source and the load are simulated, the electrical signal is detected through the three-dimensional simulation model, the three-dimensional cross-talk condition is determined through the cable simulation model, the three-dimensional cross-talk condition is determined, the cross-talk condition is determined through the two cable simulation models is determined, and the mutual cross-talk condition is completed, and the mutual condition is determined, and the mutual condition is achieved through the two cable simulation and the physical simulation condition is determined, and the mutual condition is relative to the physical condition and the actual condition and the cable and the real-condition, and the manpower and material resources are saved.
Meanwhile, compared with the existing scheme of obtaining the cable crosstalk situation through simulation by constructing a simulation model, in the existing scheme, three-dimensional modeling is often carried out in CST software to simulate an actual cable structure, the construction of the cable model is complex due to the complexity of the cable structure, the simulation obtaining of the cable model is that a port of a connecting circuit is not reserved, only cable model data can be imported into a CST design operation environment and cannot be directly imported into the cable model, the simulation effect is poor, the cable model can be obtained by only setting node coordinates of a cable and connecting the node coordinates, then the cable model can be constructed by carrying out first attribute setting on the cable model, the actual structure of the cable model is not needed, and the cable model construction is simpler. Meanwhile, the obtained cable model can be provided with a port for connecting a circuit, so that the cable model can be directly guided into a design working chamber for simulation, and the simulation effect is better.
Drawings
FIG. 1 is a flow diagram of a simulation method of cable crosstalk in one embodiment;
FIG. 2 is a flow chart of a simulation method of cable crosstalk in another embodiment;
FIG. 3 is a flow chart of a simulation method of cable crosstalk in another embodiment;
FIG. 4 is a block diagram of a simulation apparatus of cable crosstalk in one embodiment;
fig. 5 is an internal structural diagram of a computer device in one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In one embodiment, as shown in fig. 1, a simulation method of cable crosstalk is provided, where this embodiment is applied to a terminal to illustrate the method, it is understood that the method may also be applied to a server, and may also be applied to a system including a terminal and a server, and implemented through interaction between the terminal and the server. In this embodiment, the method includes the steps of:
step S102, setting at least two node coordinates for a first cable and a second cable respectively in a CST cable running environment, connecting the node coordinates of the first cable to obtain a first cable model, and connecting the coordinates of the second cable to obtain a second cable model; setting a first attribute of the first cable model and the second cable model to construct a cable simulation model;
The CST (Computer Simulation Technology ) simulation software includes a plurality of studio sub-software, such as a CST cable studio sub-software, a CST microwave studio sub-software, and a CST design studio sub-software, and a CST cable running environment, i.e., a network running environment corresponding to the CST cable studio sub-software.
The actions performed in step S102 are performed in a CST cable running environment, in which the terminal sets at least two node coordinates for the first cable and the second cable, respectively, and specifically, the first cable (or the second cable) may be a straight cable or a curved cable, and if a cable model of the straight cable needs to be constructed, the number of node coordinates of the straight cable is 2, that is, the node coordinates include a first node coordinate and a last node coordinate, and if a cable model of the curved cable needs to be constructed, the number of node coordinates of the curved cable is 3 or more, including a first node coordinate and a last node coordinate, and an intermediate node coordinate corresponding to a curve turning point.
The cable can comprise at least one wire harness, a line segment obtained by connecting node coordinates corresponding to each wire harness in the cable is used as a wire harness model of the cable, and the wire harness models are associated to form a cable model. The terminal can be connected with the first node coordinate and the tail node coordinate of the linear cable to obtain a cable model, and can be sequentially connected with the first node coordinate, the middle node coordinate and the tail node coordinate of the curve cable to obtain the cable model of the curve cable, so that a first cable model corresponding to the first cable and a second cable model corresponding to the second cable can be obtained, and the terminal can set first attributes of the first cable model and the second cable model respectively to construct a cable simulation model.
Alternatively, in this embodiment, the node coordinates may be set in the following manner: the terminal determines the node coordinates selected by the user based on the clicking operation or the touching operation of the user on the page, or the terminal determines the node coordinates based on the coordinate data manually input by the user, or the terminal determines the node coordinates based on the operation of the user drawing the line segment on the page.
Step S104, a cable simulation model is imported into a CST microwave operation environment, and the attribute of the grounding plate is set based on the cable simulation model in the CST microwave operation environment so as to perform model construction on the grounding plate, and a physical simulation model is obtained; electromagnetic simulation parameters are set for a joint simulation model comprising a physical simulation model and a cable simulation model.
The terminal imports the cable simulation model constructed under the CST cable running environment into the CST microwave running environment, if the CST cable running environment and the CST microwave running environment correspond to different terminal pages, the cable simulation model in the page corresponding to the CST cable running environment is imported into the page corresponding to the CST microwave running environment when the CST cable running environment and the CST microwave running environment are actually executed;
the terminal simulates the grounding plate of the cable simulation model in a CST microwave operation environment in a 3D modeling mode, and sets the attribute of the grounding plate to perform model construction on the grounding plate to obtain a physical simulation model, and in the embodiment, the structure of the actual grounding plate is simulated in the 3D modeling mode, so the simulated model is called as the physical simulation model. In this embodiment, the case structure may be simulated by 3D modeling for the case where the cable and the ground plane need to be wrapped with a case.
The terminal takes the entity simulation model and the cable simulation model as a joint simulation model together, and sets electromagnetic simulation parameters aiming at the joint simulation model, and the method specifically comprises the following steps: setting electromagnetic simulation parameters for the physical simulation model, setting electromagnetic simulation parameters for the cable simulation model, and setting interactive electromagnetic simulation parameters related to the physical simulation model and the cable simulation model.
Step S106, the joint simulation model is imported into a CST design operation environment, a signal source and a load are accessed to the joint simulation model in the CST design operation environment, the joint simulation model is simulated by changing at least one of the second attribute of the first cable model, the second attribute of the second cable model, the attribute of the grounding plate or electromagnetic simulation parameters, the electric signals of the first cable model and the second cable model are detected respectively during each simulation, and the cable crosstalk condition between the two cables is determined based on the electric signals.
The terminal imports the joint simulation model in the CST microwave operation environment into the CST design operation environment, and similarly, if the CST microwave operation environment and the CST design operation environment correspond to different terminal pages, the joint simulation model in the page corresponding to the CST microwave operation environment is imported into the page corresponding to the CST design operation environment in actual execution;
In a CST design operation environment, the terminal is connected with a circuit aiming at the joint simulation model, wherein the joint simulation model is connected with a signal source and a load, a first cable can be used as an interference line, and one end of the first cable is connected with the signal source. In this embodiment, the load includes a resistor and/or a node element, etc., and the value of the load device is set by the terminal based on the user operation and can be modified.
After the signal source and the load are accessed, the terminal can perform simulation operation on the combined simulation model based on a simulation start instruction input by a user, and then perform multiple simulations on the combined simulation model by changing at least one of a second attribute of the first cable model, a second attribute of the second cable model, an attribute of the ground plane or electromagnetic simulation parameters, wherein the second attribute of the cable model (both refer to the first cable model or the second cable model in the application) comprises the first attribute of the cable model. And when the terminal is simulated each time, the probe models are respectively arranged in the first cable model and the second cable model and are used for detecting the electric signals in the cable models, so that the cable crosstalk condition between the two cables can be determined based on the electric signals of the first cable model and the second cable model detected by each simulation.
In this embodiment, the electrical signal may be a voltage signal or a current signal.
After determining the cable crosstalk condition between two cables, the terminal analyzes the cable crosstalk condition to form a coupling rule, wherein the coupling rule refers to a change rule of the cable crosstalk along with the change of a simulation condition (namely at least one of a second attribute of a first cable model, a second attribute of a second cable model, an attribute of a grounding plate or an electromagnetic simulation parameter). For example, as the node coordinates of the first and/or second cable models change, the distance between the two cable models may also change, and the coupling rule may be that as the distance between the two cable models increases, the crosstalk gradually decreases. Therefore, the actual cable can be built based on the coupling rule.
In this embodiment, two line segments obtained by respectively connecting node coordinates of two cables may be two parallel line segments or two non-parallel line segments, and the distance between the two cable models may be the distance between the two parallel line segments or the maximum distance between the non-parallel line segments.
According to the application, at least two node coordinates are respectively set for a first cable and a second cable in a CST cable running environment, the first cable model and the second cable model can be obtained by connecting the corresponding node coordinates, then the first attribute of the two cable models is set, and a cable simulation model is constructed, namely, the cable simulation model is constructed in the CST cable running environment, then the cable simulation model is imported into the CST microwave running environment, the physical simulation model is constructed in the CST microwave running environment based on the attributes of a cable simulation model, electromagnetic simulation parameters are set for the joint simulation model comprising the physical simulation model and the cable simulation model, then the joint simulation model in the CST microwave running environment is imported into the CST design running environment, and the joint simulation model is imported into the physical simulation model by changing at least one of the second attribute of the cable, the attribute of the grounding flat plate and the electromagnetic simulation parameters.
Meanwhile, compared with the existing scheme of obtaining the cable crosstalk situation through simulation by constructing a simulation model, in the existing scheme, three-dimensional modeling is often carried out in CST software to simulate an actual cable structure, the construction of the cable model is complex due to the complexity of the cable structure, the simulation obtaining of the cable model is that a port of a connecting circuit is not reserved, only cable model data can be imported into a CST design operation environment and cannot be directly imported into the cable model, the simulation effect is poor, the cable model can be obtained by only setting node coordinates of a cable and connecting the node coordinates, then the cable model can be constructed by carrying out first attribute setting on the cable model, the actual structure of the cable model is not needed, and the cable model construction is simpler. Meanwhile, the obtained cable model can be provided with a port for connecting a circuit, so that the cable model can be directly guided into a design working chamber for simulation, and the simulation effect is better.
In one embodiment, the setting process of the first attribute in step S102 specifically includes: setting material properties, physical properties and electrical properties of the cable;
wherein the material property comprises at least one of dielectric constant, dielectric loss tangent, magnetic permeability, or electrical conductivity;
The physical properties include at least one of braid density, braid angle, cable conductor diameter, cable conductor shape, wire spacing, wire number, wire strand shape, or coating thickness of the cable; in a possible case, if at least two wire harnesses are included in the cable, the wire pitch refers to the distance between the at least two wire harnesses, and the number of wires refers to the number of wire harnesses in the cable; the strand form of the cable comprises at least one of a single wire, twisted pair, coaxial wire, flat cable, or hybrid wire.
The electrical characteristic includes at least one of a transferred impedance or shielding effectiveness.
The cable model comprises at least one model of an inner conductor model, an inner insulating layer model, a shielding layer model or an outer insulating layer model, and the material property and the electrical property of any model can be set.
In the embodiment, a specific setting process of the first attribute is recorded, and the cable simulation model is constructed by setting the first attribute of the cable model, so that the joint simulation model is obtained based on the cable simulation model, the cable crosstalk condition between two cables is determined by simulating the joint simulation model, and manpower and material resource are saved.
In one embodiment, the property of the ground plane includes at least one of a material property or a dimension. The size of the grounding plate refers to the length, width and height of the grounding plate, and the grounding plate material can be a metal conductor.
In this embodiment, the physical simulation model is built by setting at least one of the material property or the size of the grounding plate, so that a joint simulation model is obtained based on the physical simulation model, and the joint simulation model is simulated to determine the cable crosstalk condition between two cables, thereby saving manpower and material resources.
In one embodiment, the electromagnetic simulation parameters include at least one of: signal source frequency; the solving frequency and the solving precision of the entity simulation model and the cable simulation model; the method comprises the steps of carrying out a first treatment on the surface of the The distance between the two cable models and the ground plane plate; background and boundary conditions.
In the embodiment of the application, the node coordinates of the cable can be two-dimensional coordinates or three-dimensional coordinates.
One is that the two cable models are located on the same horizontal plane, i.e. the distances between the two cable models and the ground plane are equal, the distance between the two cable models and the ground plane refers to the distance between the two cable models and the physical simulation model, and the other is that the two cable models are not located on the same horizontal plane, the distances between the two cable models and the ground plane are unequal, and the distance between the two cable models and the ground plane comprises the distance between the first cable model and the physical simulation model and the distance between the second cable model and the physical simulation model.
It should be noted that, the specific implementation manner of setting the distance between the two cable models and the ground plane plate is as follows: the position of the two cable models is fixed after the node coordinates of the two cable models are set, the coordinates of the grounding flat plate are set when the terminal simulates the grounding flat plate in a 3D modeling mode, the position of the simulated grounding flat plate model on a terminal page is also fixed, the distance between the two cable models and the grounding flat plate is set by the terminal, the distance between the two cable models and the grounding flat plate is calculated automatically by the terminal based on the node coordinates of the cable models and the coordinates of the grounding flat plate, namely, the distance between the two cable models and the grounding flat plate is set automatically by the terminal without manual setting of a user.
It should be noted that, for example, the solving frequency and the solving precision of the physical simulation model and the cable simulation model are respectively the electromagnetic simulation parameters of the physical simulation model and the electromagnetic simulation parameters of the cable simulation model, and the distance between the two cable models and the ground plane is the interactive electromagnetic simulation parameters related to the physical simulation model and the cable simulation model.
In this embodiment, after setting at least one parameter included in the electromagnetic simulation parameters for the joint simulation model, the cable crosstalk situation between two cables can be obtained by simulating the joint simulation model after setting the parameters, and the cable crosstalk situation is obtained by a model simulation mode, so that manpower and material resources are saved.
In one embodiment, the simulating the joint simulation model in step S106 by changing at least one of the second attribute of the first cable model, the second attribute of the second cable model, the attribute of the ground plane, or the electromagnetic simulation parameter includes: judging whether the distance between the two cable models is smaller than a preset distance threshold value or not; if yes, simulating the combined simulation model by changing at least one of the second attribute of the first cable model, the second attribute of the second cable model, the attribute of the grounding plate or the electromagnetic simulation parameter.
In this embodiment, only if the distance between the two cable models is smaller than the preset distance threshold, the cable simulation model is simulated, and if the distance exceeds the preset distance threshold, no cable crosstalk exists between the two cable models by default.
In one embodiment, before setting the electromagnetic simulation parameters for the joint simulation model including the physical simulation model and the cable simulation model, the method further includes: and respectively gridding the cable simulation model and the entity simulation model.
Gridding a cable simulation model refers to dividing a line segment corresponding to the cable simulation model into a limited number of straight line segments. When the cable simulation model is solved by using a transmission line algorithm, the line segments in the cable simulation model can be divided into a limited number of straight line segments, so that a long cable can be equivalent to transmission line parameters (namely, each section of straight line segment can be equivalent to resistance, capacitance, inductance and/or conductivity values) of each unit length, which is equivalent to dividing the line segments in the cable simulation model into small blocks for solving one by one, and then integrating the solving result of each small block to obtain the solving result of the whole line segment.
Gridding the entity simulation model means that the entity simulation model is gridded, when the entity simulation model is solved by a time domain finite difference algorithm, the entity simulation model is divided into hexahedral models, and when the entity simulation model is simulated by a frequency finite element algorithm, the entity simulation model is divided into tetrahedral models.
In the embodiment, the cable simulation model and the entity simulation model are respectively gridded, so that the cable simulation model and the entity simulation model after gridding can be used for simulation in the follow-up process, and the simulation accuracy is enhanced.
Referring to fig. 2, in one embodiment, the second attribute includes a first attribute and a cable length; step S106 simulates the joint simulation model by changing at least one of the second attribute of the first cable model, the second attribute of the second cable model, the attribute of the ground plane, or the electromagnetic simulation parameter, including:
step S202, determining a plurality of simulation items corresponding to the cable model based on at least one of the second attribute of the first cable model or the second attribute of the second cable model, wherein the simulation items comprise at least one of ohmic loss, dielectric loss or the maximum coupling distance of the cable wire bundle;
In step S204, in response to the selection operation for the plurality of simulation items, the joint simulation model is simulated based on the default simulation item and the simulation item determined by the selection operation, the default simulation item including the cable length, the cable length being related to the node coordinates of the corresponding cable.
In this embodiment, the simulation terms are associated with a second property of the cable model, one simulation term may be associated with at least one of the second properties, such as the second property associated with dielectric loss including permittivity, permeability, and conductivity, and the second property associated with the maximum coupling distance of the cable wire harness including wire spacing.
The second simulation item specifically comprises a first attribute and a cable length, wherein the cable length refers to the length of a line segment obtained after connecting node coordinates corresponding to the cable, if the cable is a straight line, the cable length is the length of a straight line, if the cable is a curve, any adjacent connection point coordinates in the node coordinates corresponding to the curve cable are connected to form a small straight line segment, at least two small straight line segments can be obtained after connecting the node coordinates corresponding to the curve cable in sequence, and the cable length of the curve cable is the accumulation of the lengths of a plurality of small straight line segments. The cable length is obviously related to the node coordinates of the corresponding cable, and changing the cable length of the cable model can be achieved by changing the node coordinates of the cable.
The terminal may determine a plurality of simulation items corresponding to the first cable model based on the second attribute of the first cable model, or determine a plurality of simulation items corresponding to the second cable model based on the second attribute of the second cable model, or determine a plurality of simulation items corresponding to the first cable model and a plurality of simulation items corresponding to the second cable model based on the second attribute of the first cable model and the second attribute of the second cable model, respectively. The plurality of simulation items corresponding to the first cable model and the plurality of simulation items corresponding to the second cable model may be the same.
The terminal displays selection buttons corresponding to each simulation item in the plurality of simulation items on a page, and when the selection operation of a user for at least one simulation item in the plurality of simulation items is detected, the simulation is performed on the combined simulation model based on the default simulation item and the simulation item determined by the selection operation. The default simulation item refers to other attributes, including cable length, in the second attribute except for the attribute having correspondence with the plurality of simulation items.
If at least one loss of ohmic loss, dielectric loss or the maximum coupling distance of the wire harness in the cable is ignored during simulation, the corresponding simulation item is not selected, so that even if the second attribute corresponding to the simulation item is set, the simulation can be ignored, and the requirement of user diversification is met.
Referring to fig. 3, the present embodiment provides a simulation method for cable crosstalk, which specifically includes:
1. using CST cable studio software (cable studio in the corresponding figure) the following steps were first performed:
first, the node coordinates of the cables are created, the first node coordinates of the first cable are defined as N1 (-500,0,0), the tail node coordinates of the second cable are defined as N1 (500,0,0), the first node coordinates of the second cable are defined as N3 (-500, -30, 0), and the tail node coordinates of the second cable are defined as N4 (500, -30, 0) (cable nodes are defined in the corresponding diagrams). Nodes N1 and N2 are selected, a path of a first cable is created, nodes N3 and N4 are also selected, a path of a second cable is created (cable paths are defined in the corresponding diagrams), and the line segments of the cables are bundled to obtain corresponding cable models (cable bundles in the corresponding diagrams are bundled and form geometric models, namely a first cable model and a second cable model).
The terminal sets the material property, the physical property and the electrical parameter property of the cable model through the cable working chamber to form a physical model, namely a cable simulation model. And performing grid division on the cable simulation model through the cable working chamber to form a cable solving model.
The present embodiment sets the first cable model to be of the RG58 coaxial line type and the second cable model to be of the RG316 coaxial line type. And selecting simulation items corresponding to at least one loss such as ohmic loss, dielectric loss and maximum coupling distance between wire harnesses through Cable- > Modeling- >2D (TL) Modeling, and carrying out Cable model Meshing through Start Mesh.
2. Using CST microwave working chamber sub-software (corresponding to the microwave working chamber in the figure), the following steps are performed:
creating a grounding plate (corresponding to 3D model Modeling in the figure) with the length of 2m, the width of 0.2m and the distance from a cable model of 0.1m through Modeling- > Shapes- > Brick, setting the grounding plate material as an ideal metal conductor to construct a physical simulation model, setting the solving frequency of the cable simulation model and the physical simulation model to be 0-100 MHz (corresponding to frequency setting in the figure), setting the background and the boundary to be air and open boundary conditions, setting the grid attribute of the physical simulation model through Mesh- > Global Properties- > Hexaheat TLM, and carrying out grid division on the physical simulation model to set the solving items of the cable simulation model and the physical simulation model.
3. Using CST design studio sub-software, the following steps were performed:
default the first cable to be the victim wire and the second cable to be the victim wire. Therefore, a signal source excitation port is added at the first cable model, and the signal source is set to 220V alternating current (defined by the signal source in the corresponding diagram). Load devices such as drag resistors and ground elements enter the design interface, wherein the values of the drag resistors and ground elements can be modified by double clicking. And after the circuit connection is completed, a probe model is added to the first cable model and the second cable model respectively for monitoring the voltage and the current in the circuit. Clicking Home- > Simulation- > Update to start the Simulation of the task (corresponding Simulation solution), and checking the voltage and current values of the second cable model, namely the received crosstalk value, in the Simulation result after the Simulation is completed.
After the simulation of the steps is completed, multiple simulations can be performed by changing the distance between the two cable models and the ground plane, and the influence of the distance change between the two cable models on crosstalk can be obtained by changing the distance between the two cable models, so that a coupling rule is formed, and wiring and design are guided. It is also possible, as is common, to line the length of the cable, the material properties of the cable, the physical properties of the cable, such as the braid density, the size of the ground plane, the solving frequency of the physical simulation model and/or the solving frequency of the simulation model of the cable.
Compared with the existing scheme of determining the crosstalk condition between cables by building cable real objects and related circuits, the simulation method of the cable crosstalk does not need to manufacture a large number of real objects and clamps, and tests are not limited by various factors such as samples, sites and equipment, so that manpower and material resources are saved.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the application also provides a cable crosstalk simulation device for realizing the simulation method of the cable crosstalk. The implementation scheme of the device for solving the problem is similar to that described in the above method, so the specific limitation in the embodiments of the simulation device for crosstalk of one or more cables provided below can be referred to the limitation of the simulation method for crosstalk of cables in the above description, and will not be repeated here.
In one embodiment, as shown in fig. 4, there is provided a simulation apparatus 400 of cable crosstalk, including: a first simulation model construction module 402, a second simulation model construction module 404, and a simulation module 406, wherein:
the first simulation model construction module 402 is configured to set at least two node coordinates for a first cable and a second cable in a CST cable running environment, connect the node coordinates of the first cable to obtain a first cable model, and connect the coordinates of the second cable to obtain a second cable model; setting a first attribute of the first cable model and the second cable model to construct a cable simulation model;
a second simulation model construction module 404, configured to introduce the cable simulation model into a CST microwave operation environment, set properties of a ground plane based on the cable simulation model in the CST microwave operation environment, so as to perform model construction on the ground plane, and obtain a physical simulation model; setting electromagnetic simulation parameters for a joint simulation model comprising the entity simulation model and the cable simulation model;
the simulation module 406 is configured to import the joint simulation model into a CST design operation environment, access a signal source and a load to the joint simulation model in the CST design operation environment, simulate the joint simulation model by changing at least one of a second attribute of a first cable model, a second attribute of a second cable model, an attribute of a ground plane, or the electromagnetic simulation parameter, and detect electrical signals of the first cable model and the second cable model during each simulation, and determine a cable crosstalk condition between two cables based on the electrical signals.
In one embodiment, the setting process of the first attribute by the first simulation model building module 402 specifically includes:
an attribute setting unit configured to set a material attribute, a physical attribute, and an electrical characteristic of the cable, the material attribute including at least one of a dielectric constant, a dielectric loss tangent, a magnetic permeability, or an electrical conductivity; the physical properties include at least one of braid density, braid angle, cable conductor diameter, cable conductor shape, wire spacing, wire number, wire strand shape, or coating thickness of the cable; the electrical characteristic includes at least one of a transferred impedance or a shielding effectiveness.
In one embodiment, the property of the ground plane includes at least one of a material property or a dimension.
In one embodiment, the electromagnetic simulation parameters include at least one of: signal source frequency; the solving frequency and the solving precision of the entity simulation model and the cable simulation model; the distance between the two cable models and the ground plane plate; background and boundary conditions.
In one embodiment, the apparatus further comprises a gridding model:
and the gridding module is used for gridding the cable simulation model and the entity simulation model respectively.
In one embodiment, the second attribute includes the first attribute and a cable length; the simulation module 406 specifically includes a determining unit and a simulation unit when the joint simulation model is simulated by changing at least one of the second attribute of the first cable model, the second attribute of the second cable model, the attribute of the ground plane, or the electromagnetic simulation parameter:
a determining unit, configured to determine a plurality of simulation items corresponding to the cable model based on at least one of the second attribute of the first cable model or the second attribute of the second cable model, where the plurality of simulation items includes at least one of ohmic loss, dielectric loss, or a maximum coupling distance of a cable harness in the cable;
and the simulation unit is used for responding to the selection operation of the plurality of simulation items, simulating the joint simulation model based on a default simulation item and the simulation item determined by the selection operation, wherein the default simulation item comprises a cable length, and the cable length is related to the node coordinates of the corresponding cable.
The above-described respective modules in the simulation apparatus for cable crosstalk may be implemented in whole or in part by software, hardware, and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a computer device is provided, which may be a terminal, and the internal structure of which may be as shown in fig. 5. The computer device includes a processor, a memory, an input/output interface, a communication interface, a display unit, and an input means. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program, when executed by a processor, implements a method of simulating cable crosstalk. The display unit of the computer device is used for forming a visual picture, and can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in FIG. 5 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
In one embodiment, a computer device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of:
in a CST cable operation environment, at least two node coordinates are respectively set for a first cable and a second cable, the node coordinates of the first cable are connected to obtain a first cable model, and the coordinates of the second cable are connected to obtain a second cable model; setting a first attribute of the first cable model and the second cable model to construct a cable simulation model;
the cable simulation model is imported into a CST microwave operation environment, and the attribute of the grounding plate is set based on the cable simulation model in the CST microwave operation environment so as to perform model construction on the grounding plate, and a physical simulation model is obtained; setting electromagnetic simulation parameters for a joint simulation model comprising the entity simulation model and the cable simulation model;
And leading the joint simulation model into a CST design operation environment, accessing a signal source and a load to the joint simulation model in the CST design operation environment, simulating the joint simulation model by changing at least one of a second attribute of a first cable model, a second attribute of a second cable model, an attribute of a grounding plate or electromagnetic simulation parameters, respectively detecting electric signals of the first cable model and the second cable model during each simulation, and determining cable crosstalk conditions between the two cables based on the electric signals.
In one embodiment, the processor when executing the computer program further performs the steps of:
the setting process of the first attribute comprises the following steps: setting material properties, physical properties and electrical characteristics of the cable, wherein the material properties comprise at least one of dielectric constant, dielectric loss tangent, magnetic permeability or electrical conductivity; the physical properties include at least one of braid density, braid angle, cable conductor diameter, cable conductor shape, wire spacing, wire number, wire strand shape, or coating thickness of the cable; the electrical characteristic includes at least one of a transferred impedance or a shielding effectiveness. In one embodiment, the processor when executing the computer program further performs the steps of: the properties of the ground plane include at least one of material properties or dimensions.
In one embodiment, the processor when executing the computer program further performs the steps of: the electromagnetic simulation parameters include at least one of: signal source frequency; the solving frequency and the solving precision of the entity simulation model and the cable simulation model; the distance between the two cable models and the ground plane plate; background and boundary conditions.
In one embodiment, the processor when executing the computer program further performs the steps of: the method further comprises the following steps before setting electromagnetic simulation parameters for a joint simulation model comprising the entity simulation model and the cable simulation model: and respectively gridding the cable simulation model and the entity simulation model. … …
In one embodiment, the processor when executing the computer program further performs the steps of:
the second attribute includes the first attribute and a cable length; the simulating the joint simulation model by changing at least one of a second attribute of the first cable model, a second attribute of the second cable model, an attribute of the ground plane, or the electromagnetic simulation parameter includes:
determining a plurality of simulation items corresponding to the cable model based on at least one of the second attribute of the first cable model or the second attribute of the second cable model, wherein the simulation items comprise at least one of ohmic loss, dielectric loss or maximum coupling distance of a cable wire bundle;
And in response to a selection operation for the plurality of simulation items, simulating the joint simulation model based on a default simulation item and the simulation item determined by the selection operation, wherein the default simulation item comprises cable lengths which are related to node coordinates of corresponding cables.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, carries out the steps of the method embodiments described above.
In an embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of the method embodiments described above.
It should be noted that, the user information (including but not limited to user equipment information, user personal information, etc.) and the data (including but not limited to data for analysis, stored data, presented data, etc.) related to the present application are information and data authorized by the user or sufficiently authorized by each party, and the collection, use and processing of the related data need to comply with the related laws and regulations and standards of the related country and region.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. A method of simulating cable crosstalk, the method comprising:
in a CST cable operation environment, at least two node coordinates are respectively set for a first cable and a second cable, the node coordinates of the first cable are connected to obtain a first cable model, and the coordinates of the second cable are connected to obtain a second cable model; setting a first attribute of the first cable model and the second cable model to construct a cable simulation model;
The cable simulation model is imported into a CST microwave operation environment, and the attribute of the grounding plate is set based on the cable simulation model in the CST microwave operation environment so as to perform model construction on the grounding plate, and a physical simulation model is obtained; setting electromagnetic simulation parameters for a joint simulation model comprising the entity simulation model and the cable simulation model;
and leading the joint simulation model into a CST design operation environment, accessing a signal source and a load to the joint simulation model in the CST design operation environment, simulating the joint simulation model by changing at least one of a second attribute of a first cable model, a second attribute of a second cable model, an attribute of a grounding plate or electromagnetic simulation parameters, respectively detecting electric signals of the first cable model and the second cable model during each simulation, and determining cable crosstalk conditions between the two cables based on the electric signals.
2. The method of claim 1, wherein the setting of the first attribute comprises:
setting material properties, physical properties and electrical characteristics of the cable, wherein the material properties comprise at least one of dielectric constant, dielectric loss tangent, magnetic permeability or electrical conductivity; the physical properties include at least one of braid density, braid angle, cable conductor diameter, cable conductor shape, wire spacing, wire number, wire strand shape, or coating thickness of the cable; the electrical characteristic includes at least one of a transferred impedance or a shielding effectiveness.
3. The method of claim 1, wherein the property of the ground plane comprises at least one of a material property or a dimension.
4. The method of claim 1, wherein the electromagnetic simulation parameters include at least one of: signal source frequency; the solving frequency and the solving precision of the entity simulation model and the cable simulation model; the distance between the two cable models and the ground plane plate; background and boundary conditions.
5. The method of claim 1, further comprising, prior to setting electromagnetic simulation parameters for a joint simulation model comprising the physical simulation model and the cable simulation model:
and respectively gridding the cable simulation model and the entity simulation model.
6. The method of claim 1, wherein the second attribute comprises the first attribute and a cable length; the simulating the joint simulation model by changing at least one of a second attribute of the first cable model, a second attribute of the second cable model, an attribute of the ground plane, or the electromagnetic simulation parameter includes:
determining a plurality of simulation items corresponding to the cable model based on at least one of the second attribute of the first cable model or the second attribute of the second cable model, wherein the simulation items comprise at least one of ohmic loss, dielectric loss or maximum coupling distance of a cable wire bundle;
And in response to a selection operation for the plurality of simulation items, simulating the joint simulation model based on a default simulation item and the simulation item determined by the selection operation, wherein the default simulation item comprises cable lengths which are related to node coordinates of corresponding cables.
7. A simulation apparatus for cable crosstalk, the apparatus comprising:
the first simulation model construction module is used for setting at least two node coordinates for a first cable and a second cable respectively in a CST cable running environment, connecting the node coordinates of the first cable to obtain a first cable model, and connecting the coordinates of the second cable to obtain a second cable model; setting a first attribute of the first cable model and the second cable model to construct a cable simulation model;
the second simulation model construction module is used for guiding the cable simulation model into a CST microwave operation environment, setting the attribute of the grounding flat plate based on the cable simulation model in the CST microwave operation environment so as to perform model construction on the grounding flat plate and obtain a physical simulation model; setting electromagnetic simulation parameters for a joint simulation model comprising the entity simulation model and the cable simulation model;
The simulation module is used for leading the joint simulation model into a CST design operation environment, accessing a signal source and a load to the joint simulation model under the CST design operation environment, simulating the joint simulation model by changing at least one of a second attribute of a first cable model, a second attribute of a second cable model, an attribute of a grounding plate or electromagnetic simulation parameters, detecting electric signals of the first cable model and the second cable model respectively during each simulation, and determining cable crosstalk conditions between the two cables based on the electric signals.
8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 6 when the computer program is executed.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
10. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
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