CN113255276A - Method and system for optimizing vibration performance of printed circuit board and electronic equipment - Google Patents
Method and system for optimizing vibration performance of printed circuit board and electronic equipment Download PDFInfo
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- CN113255276A CN113255276A CN202110562544.7A CN202110562544A CN113255276A CN 113255276 A CN113255276 A CN 113255276A CN 202110562544 A CN202110562544 A CN 202110562544A CN 113255276 A CN113255276 A CN 113255276A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2115/00—Details relating to the type of the circuit
- G06F2115/12—Printed circuit boards [PCB] or multi-chip modules [MCM]
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Abstract
The invention provides a method and a system for optimizing vibration performance of a printed circuit board and electronic equipment, and relates to the technical field of new energy automobiles, wherein the method is used for the assembly process of the printed circuit board in a vehicle-mounted charger, and firstly, attribute data of the printed circuit board is obtained; then, performing modal analysis on the printed circuit board according to the attribute data of the printed circuit board, and determining the resonance frequency of each component in the printed circuit board; determining the position of a component with the resonance frequency lower than a preset frequency threshold value as a region to be optimized; and after at least one damping device is installed on the area to be optimized, modal analysis is carried out on the printed circuit board until the resonance frequency of the area to be optimized is greater than a preset frequency threshold. According to the method, the low-order modal weak area is obtained through modal analysis, the mode is optimized by using the damping device aiming at the weak area, the vibration performance of the printed circuit board is improved, the number of fastening screws in the printed circuit board of the vehicle-mounted charger can be reduced, and the assembly efficiency of the printed circuit board is improved.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a method and a system for optimizing vibration performance of a printed circuit board and electronic equipment.
Background
The vehicle-mounted charger in the new energy automobile is used as charging equipment and has the capability of safely and automatically charging the power battery of the electric automobile. With the development of new energy automobile technology, the vehicle-mounted charger also enters the development trend of high power and miniaturization. Under the influence of resonance, fastening screws are usually used in PCBs (Printed Circuit boards) of vehicle chargers to meet the requirements of vibration performance. However, due to the miniaturization of the vehicle-mounted charger, the assembly space of the fastening screws is limited, the area capable of providing the screw space is also reduced, and the vibration performance is difficult to further improve on the premise of the miniaturization of the vehicle-mounted charger.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for optimizing vibration performance of a printed circuit board, and an electronic device, wherein the vibration performance of the printed circuit board is improved by using a damping device, so that the number of fastening screws used in the printed circuit board of a vehicle-mounted charger can be reduced, and the assembly space is saved; the vibration performance is further improved on the premise of miniaturization of the vehicle-mounted charger; meanwhile, the damping device is not required to be assembled by an electric screwdriver in the installation process, and the assembly efficiency of the printed circuit board can be improved.
In a first aspect, an embodiment of the present invention provides a method for optimizing vibration performance of a printed circuit board, where the method is used in an assembly process of the printed circuit board in a vehicle-mounted battery charger, and includes:
acquiring attribute data of the printed circuit board;
performing modal analysis on the printed circuit board according to the attribute data of the printed circuit board, and determining the resonance frequency of each component in the printed circuit board;
determining the position of a component with the resonance frequency lower than a preset frequency threshold value as a region to be optimized;
after at least one damping device is installed on the area to be optimized, modal analysis is carried out on the printed circuit board until the resonance frequency of the area to be optimized is larger than a preset frequency threshold.
In some embodiments, the step of performing modal analysis of the printed circuit board based on the attribute data of the printed circuit board to determine the resonant frequency of components in the printed circuit board comprises:
inputting the attribute data of the printed circuit board into a preset finite element analysis model;
and performing modal analysis on the attribute data of the printed circuit board by using the finite element analysis model, and determining the resonance frequency of each component in the printed circuit board under the multi-order mode.
In some embodiments, the multi-order modality is at least a 6-order modality.
In some embodiments, after installing the at least one damping device on the area to be optimized, the method further comprises:
and if the region to be optimized contains the installed encryption screws, removing the encryption screws.
In some embodiments, the step of determining the position of the component having a resonance frequency below a preset frequency threshold as the area to be optimized comprises:
if the parts comprise a plurality of parts of which the resonance frequencies are lower than a preset frequency threshold value, determining the distances among the parts according to the positions of the parts;
the method comprises the steps of obtaining the positions of a plurality of components with the distances meeting a preset distance threshold, and determining a region to be optimized according to the positions of the plurality of components.
In some embodiments, the damping device is: and the rubber pad and/or the heat conducting rubber sheet.
In some embodiments, the preset frequency threshold is the lowest resonance frequency of the vehicle-mounted charger; wherein the lowest resonance frequency is not lower than 250 Hz.
In a second aspect, an embodiment of the present invention provides a system for optimizing vibration performance of a printed circuit board, where the system is used in an assembly process of the printed circuit board in a vehicle-mounted battery charger, and the system includes:
the attribute data acquisition module is used for acquiring attribute data of the printed circuit board;
the resonance frequency determining module is used for carrying out modal analysis on the printed circuit board according to the attribute data of the printed circuit board and determining the resonance frequency of each component in the printed circuit board;
the device comprises a to-be-optimized region determining module, a to-be-optimized region determining module and a to-be-optimized region determining module, wherein the to-be-optimized region determining module is used for determining the position of a component of which the resonance frequency is lower than a preset frequency threshold as the to-be-optimized region;
and the resonance frequency optimization module is used for carrying out modal analysis on the printed circuit board after at least one damping device is installed on the area to be optimized until the resonance frequency of the area to be optimized is greater than a preset frequency threshold.
In a third aspect, an embodiment of the present invention further provides an electronic device, which includes a memory and a processor, where the memory stores a computer program that is executable on the processor, and when the processor executes the computer program, the steps of the method for optimizing the vibration performance of the printed circuit board mentioned in the first aspect are implemented.
In a fourth aspect, the present invention further provides a computer readable medium having a non-volatile program code executable by a processor, where the program code causes the processor to execute the steps of the method for optimizing the vibration performance of the printed circuit board according to the first aspect.
The embodiment of the invention brings at least the following beneficial effects:
the invention provides a method, a system and electronic equipment for optimizing vibration performance of a printed circuit board, wherein the method is used for the assembly process of the printed circuit board in a vehicle-mounted charger; then, performing modal analysis on the printed circuit board according to the attribute data of the printed circuit board, and determining the resonance frequency of each component in the printed circuit board; determining the position of a component with the resonance frequency lower than a preset frequency threshold value as a region to be optimized; and after at least one damping device is installed on the area to be optimized, modal analysis is carried out on the printed circuit board until the resonance frequency of the area to be optimized is greater than a preset frequency threshold. According to the method, the vibration performance of the printed circuit board is improved by using the damping device, the number of fastening screws in the printed circuit board of the vehicle-mounted charger can be reduced, and the assembly space is saved; the vibration performance is further improved on the premise of miniaturization of the vehicle-mounted charger; meanwhile, the damping device is not required to be assembled by an electric screwdriver in the installation process, and the assembly efficiency of the printed circuit board can be improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention as set forth above.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a method for optimizing vibration performance of a printed circuit board according to an embodiment of the present invention;
fig. 2 is a flowchart of step S102 in a method for optimizing vibration performance of a printed circuit board according to an embodiment of the present invention;
fig. 3 is a flowchart of step S103 in a method for optimizing vibration performance of a printed circuit board according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a pcb before optimization according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an optimized printed circuit board according to an embodiment of the present invention;
FIG. 6 is a graph illustrating a comparison of the first six-order modal natural frequencies of a printed circuit board according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a system for optimizing vibration performance of a printed circuit board according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Icon:
710-attribute data acquisition module; 720-resonant frequency determination module; 730-a to-be-optimized region determination module; 740-a resonant frequency optimization module; 101-a processor; 102-a memory; 103-a bus; 104-communication interface.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The vehicle-mounted charger in the new energy automobile is used as charging equipment, has the capability of safely and automatically charging a power battery of the electric automobile, and has a development trend of high power and miniaturization along with the development of new energy automobile technology. Under the influence of resonance, fastening screws are generally used in printed circuit boards of vehicle chargers to meet the requirements of vibration performance. However, due to the miniaturization of the vehicle-mounted charger, the assembly space of the fastening screws is limited, so that the number of the fastening screws is gradually reduced, and the vibration performance of the printed circuit board of the vehicle-mounted charger is difficult to improve.
Meanwhile, the printed circuit board is fastened on a metal shell of the vehicle-mounted charger by screws, the screws belong to a grounding end and need to keep a certain safety distance with the high-voltage device, namely, the high-voltage end of the high-voltage device needs to keep a certain space distance with the grounding end, so that the situation that the vehicle body is electrified due to high-voltage breakdown is prevented, and personal safety is further harmed. Therefore, the safety distance of the screw, which needs to be considered in practical use, is gradually a bottleneck in the miniaturization development of the vehicle-mounted charger.
Based on the above, the method and the system for optimizing the vibration performance of the printed circuit board and the electronic device provided by the embodiment of the invention improve the vibration performance of the printed circuit board by using the damping device, can reduce the number of fastening screws in the printed circuit board of the vehicle-mounted charger, and save the assembly space; the vibration performance is further improved on the premise of miniaturization of the vehicle-mounted charger; meanwhile, the damping device is not required to be assembled by an electric screwdriver in the installation process, and the assembly efficiency of the printed circuit board can be improved.
For the understanding of the present embodiment, a detailed description will be given to a method for optimizing the vibration performance of the printed circuit board according to the embodiment of the present invention.
Referring to fig. 1, a flowchart of a method for optimizing vibration performance of a printed circuit board is shown, and the method is used in an assembly process of the printed circuit board in a vehicle-mounted charger, and includes:
step S101, acquiring attribute data of the printed circuit board.
The attribute data of the printed circuit board serve as input data of modal analysis, and the attribute data comprise circuit board device connection relation parameters, frequency parameters, damping parameters and the like, and the intrinsic characteristics of the printed circuit board, such as frequency, damping and vibration mode, can be described through the parameters. Since the method is ultimately used to improve the vibration performance of the printed circuit board, the attribute data of the printed circuit board in this step mainly characterizes the dynamic parameters of the printed circuit board, independently of the electrically relevant attribute data.
And step S102, performing modal analysis on the printed circuit board according to the attribute data of the printed circuit board, and determining the resonance frequency of each component in the printed circuit board.
The attribute data of the printed circuit board comprises the dynamic data of the printed circuit board, so that the modal analysis can be carried out on the attribute data of the printed circuit board. The modal analysis is a method applied in the field of engineering vibration to research the dynamic characteristics of a structure, and the mode refers to the inherent vibration characteristics of a mechanical structure, and each mode has specific inherent frequency, damping ratio and mode shape. The process of analyzing these modal parameters is called modal analysis.
The modal analysis obtains the resonance frequency and the vibration form, and is simply an analysis method which describes the structure according to the dynamic property of the structure. The specific implementation process of the modal analysis can be performed through a related analysis program and an analysis algorithm, and the resonant frequency of each component in the printed circuit board is finally determined through the related analysis program and the analysis algorithm.
And step S103, determining the position of the component with the resonance frequency lower than a preset frequency threshold value as a region to be optimized.
The resonant frequency generally includes a plurality of natural frequencies, and when the natural frequency is low, the corresponding mode is a low-order mode. The resonance frequency of the low-order mode is lower and is more easily subjected to resonance caused by external excitation, so that the acquisition of the resonance frequency of the low-order mode is very important, and the acquisition of the low-order mode is obtained by comparing with a preset frequency threshold. When the preset frequency threshold is related to the characteristics of the printed circuit board and parameters of the vehicle-mounted charger, for example, the preset frequency threshold is 250Hz, when the resonance frequency obtained by modal analysis is lower than 250Hz, the mode corresponding to the preset frequency threshold is used as a low-order mode, and the position of a component in the printed circuit board corresponding to the mode is determined as a region to be optimized.
And step S104, after at least one damping device is installed on the area to be optimized, performing modal analysis on the printed circuit board until the resonance frequency of the area to be optimized is greater than a preset frequency threshold.
The region to be optimized represents the weak resonance position of the printed circuit board, so that the lowest resonance frequency of the printed circuit board can be improved after the damping device is installed in the region to be optimized. After the damping device is installed, although the lowest resonance frequency is improved, the requirement of a preset frequency threshold value cannot be met certainly, so modal analysis needs to be further performed on the printed circuit board, and if the area does not meet the preset frequency threshold value, the damping device is installed again in the area to be optimized to perform optimization until the resonance frequency of the area to be optimized is larger than the preset frequency threshold value.
According to the optimization method for the vibration performance of the printed circuit board in the embodiment, the low-order modal weak area is obtained through modal analysis, the mode is optimized by using the damping device aiming at the weak area, the low-order modal natural frequency of the printed circuit board is further improved, the vibration performance of the printed circuit board is improved, the number of fastening screws in the printed circuit board of the vehicle-mounted charger can be reduced, and the assembly space is saved; the vibration performance is further improved on the premise of miniaturization of the vehicle-mounted charger; meanwhile, the damping device is not required to be assembled by an electric screwdriver in the installation process, and the assembly efficiency of the printed circuit board can be improved.
In some embodiments, the step S102 of performing modal analysis on the printed circuit board according to the attribute data of the printed circuit board to determine the resonant frequency of each component in the printed circuit board includes, as shown in fig. 2:
step S201, inputting the attribute data of the printed circuit board into a preset finite element analysis model.
The finite element analysis model may be deployed in associated finite element analysis software for analyzing the printed circuit board using the finite element analysis software. The analysis requires the input of the property data of the printed circuit board into the finite element analysis model before the analysis, which can be understood as the step of data input.
Step S202, modal analysis is carried out on the attribute data of the printed circuit board by using the finite element analysis model, and the resonance frequency of each component in the printed circuit board under the multi-order mode is determined.
The resonance frequency of each part acquired in most scenes comprises a multi-order mode, and in the actual analysis process, a plurality of areas to be optimized are often present, and the shapes of the areas to be optimized are different; if the damping devices are respectively installed on the areas to be optimized, the assembly efficiency is not favorable. Therefore, the distance between the areas to be optimized needs to be determined, and if the areas to be optimized are located relatively close to each other, the areas to be optimized can be combined into one area to be optimized. Therefore, step S103 of determining the position of the component with the resonance frequency lower than the preset frequency threshold as the region to be optimized includes, as shown in fig. 3:
in step S301, if a plurality of components with resonant frequencies lower than a preset frequency threshold are included, distances between the plurality of components are determined according to positions of the plurality of components.
Each part lower than the preset frequency threshold value comprises corresponding position coordinates, and the distance between the parts can be calculated according to the coordinates of the central point of the coverage area of each part in the actual operation process; the distance between the components may also be defined as the closest distance between each component.
Step S302, positions of a plurality of components with distances meeting a preset distance threshold are obtained, and an area to be optimized is determined according to the positions of the plurality of components.
The distance threshold is a parameter for whether or not to perform the merging, and is related to the shape and layout of the components in the printed circuit board. Generally, the smaller the distance threshold, the more stringent the merge between components; the larger the distance threshold, the more relaxed the merging between components. In other words, if the distance threshold is set to 5cm, when the distance between two components is lower than 5cm, the areas covered by the two components are merged; and covering the non-component area in the merging process to finally obtain the area to be optimized. The area to be optimized follows as close to a standard geometry as possible, such as a circle, a rounded rectangle, a rectangle, etc., which facilitates the manufacture and acquisition of the relevant damping device and facilitates its deployment in the area to be optimized.
Due to the method of optimizing the printed circuit board according to the method, it is possible to already mount the encryption screws in the printed circuit board to be optimized in advance. Therefore, after obtaining and installing the relevant damping devices, the encryption screws can be removed, so in some embodiments, after installing at least one damping device on the area to be optimized, the method further comprises: and if the region to be optimized contains the installed encryption screws, removing the encryption screws.
The following describes the method for optimizing the vibration performance of the printed circuit board with reference to the specific implementation process. Fig. 4 is a schematic structural diagram of a printed circuit board before optimization, where the structural diagram is a printed circuit board of a vehicle-mounted charger before optimization. Therefore, the printed circuit board is small in size, and the screws in the printed circuit board are difficult to deploy and difficult to install as can be seen from the positions and the number of the screw holes.
In some embodiments, the preset frequency threshold is the lowest resonance frequency of the vehicle-mounted charger; wherein the lowest resonance frequency is not lower than 250 Hz. Specifically, the resonance frequency lower than 250Hz is a point to be optimized, the relevant attribute data of the printed circuit board in fig. 4 is input into simulation analysis software for modal analysis, and the natural frequency of a low-order mode is confirmed; and analyzing a region of the printed circuit board where the resonant frequency is lower than 250 Hz. The analysis result shows that the first-order resonance frequency of the three cylindrical devices in fig. 4 is 216Hz, and the requirement that the lowest resonance frequency is more than 250Hz cannot be met.
Since the three cylindrical devices are adjacent, the optimization is completed by installing one damping device according to the cross section of the three cylindrical devices, as shown in fig. 5. The damping device in fig. 5 has a cross section of a rounded triangle, so that the triangular appearance is maintained as much as possible on the basis of ensuring that the damping device can cover three cylindrical cross sections, the manufacturing and the acquisition of the damping device are facilitated, and the damping device is more conveniently deployed in an area to be optimized.
In a specific implementation process, the damping device comprises: and the rubber pad and/or the heat conducting rubber sheet. Since each object has its own resonance frequency, and there is also more than one resonance frequency. It may resonate at tens of Hz and at hundreds of Hz. If modal analysis is performed, the resonant frequency of the object is found. If these resonant frequencies are ranked from small to large in terms of frequency values, they are "stepped". The minimum resonance frequency is, for example, of the first order. The multi-order mode in this embodiment is at least a 6-order mode.
And after the damping device is installed on the area to be optimized, carrying out modal analysis on the printed circuit board continuously, and confirming that the natural frequency of a low-order mode is higher than 250 Hz. As can be seen from the comparison graph of the first six-order modal natural frequency of the printed circuit board shown in fig. 6, the resonance frequency of the multi-order modal is 0 to 700Hz, the first-order natural frequency of the optimized printed circuit board is raised to 337Hz, which is far higher than the requirement of 250Hz, so that the vibration performance of the printed circuit board is improved, the number of fastening screws in the printed circuit board of the vehicle-mounted charger is reduced, and the assembly space is saved.
According to the method for optimizing the vibration performance of the printed circuit board in the embodiment, the natural frequency of the low-order mode of the PCBA is increased by adding the damping component instead of adding the fastening screw, so that the natural frequency of the low-order mode of the printed circuit board is greater than the minimum resonance frequency of the vehicle-mounted charger, and therefore devices on the printed circuit board are prevented from being damaged due to resonance. Compared with fastening screws, the damping device is simpler to assemble and lower in cost, the number of the fastening screws in the printed circuit board of the vehicle-mounted charger can be reduced, and the assembling space is saved; the vibration performance is further improved on the premise of miniaturization of the vehicle-mounted charger; meanwhile, the damping device is not required to be assembled by an electric screwdriver in the installation process, and the assembly efficiency of the printed circuit board can be improved.
Corresponding to the above method embodiment, an embodiment of the present invention provides a system for optimizing vibration performance of a printed circuit board, where the system is used in an assembly process of the printed circuit board in a vehicle-mounted charger, and as shown in fig. 7, the system includes:
an attribute data acquisition module 710 for acquiring attribute data of the printed circuit board;
the resonant frequency determining module 720 is configured to perform modal analysis on the printed circuit board according to the attribute data of the printed circuit board, and determine a resonant frequency of each component in the printed circuit board;
a to-be-optimized region determining module 730, configured to determine a position of a component having a resonance frequency lower than a preset frequency threshold as a to-be-optimized region;
the resonant frequency optimization module 740 is configured to perform modal analysis on the printed circuit board after at least one damping device is mounted on the region to be optimized until the resonant frequency of the region to be optimized is greater than a preset frequency threshold.
The optimization system of the vibration performance of the printed circuit board provided by the embodiment of the invention has the same technical characteristics as the optimization method of the vibration performance of the printed circuit board provided by the embodiment, so that the same technical problems can be solved, and the same technical effect can be achieved. For the sake of brief description, the embodiments are not mentioned in part, and reference may be made to the corresponding contents in the foregoing embodiments of the method for optimizing the vibration performance of the printed circuit board.
The embodiment also provides an electronic device, a schematic structural diagram of which is shown in fig. 8, and the electronic device includes a processor 101 and a memory 102; the memory 102 is used for storing one or more computer instructions, and the one or more computer instructions are executed by the processor to implement the method for optimizing the vibration performance of the printed circuit board.
The electronic device shown in fig. 8 further comprises a bus 103 and a communication interface 104, and the processor 101, the communication interface 104 and the memory 102 are connected through the bus 103.
The Memory 102 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Bus 103 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 8, but that does not indicate only one bus or one type of bus.
The communication interface 104 is configured to connect with at least one user terminal and other network units through a network interface, and send the packaged IPv4 message or IPv4 message to the user terminal through the network interface.
The processor 101 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 101. The Processor 101 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The various methods, steps, and logic blocks disclosed in the embodiments of the present disclosure may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present disclosure may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 102, and the processor 101 reads the information in the memory 102 and completes the steps of the method of the foregoing embodiment in combination with the hardware thereof.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs the steps of the method of the foregoing embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention or a part thereof, which essentially contributes to the prior art, can be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for optimizing vibration performance of a printed circuit board is characterized in that the method is used for the assembly process of the printed circuit board in a vehicle-mounted charger and comprises the following steps:
acquiring attribute data of the printed circuit board;
performing modal analysis on the printed circuit board according to the attribute data of the printed circuit board, and determining the resonant frequency of each component in the printed circuit board;
determining the position of the component with the resonance frequency lower than a preset frequency threshold value as a region to be optimized;
and after at least one damping device is arranged on the area to be optimized, performing modal analysis on the printed circuit board until the resonance frequency of the area to be optimized is greater than the preset frequency threshold.
2. The method of claim 1, wherein the step of performing modal analysis of the printed circuit board to determine resonant frequencies of components in the printed circuit board based on the printed circuit board property data comprises:
inputting the attribute data of the printed circuit board into a preset finite element analysis model;
and performing modal analysis on the attribute data of the printed circuit board by using the finite element analysis model, and determining the resonance frequency of each component in the printed circuit board under a multi-order mode.
3. The method of claim 2, wherein the multi-order mode is at least 6-order mode z.
4. The method of optimizing printed circuit board vibration performance of claim 1, wherein after mounting at least one damping device on the area to be optimized, the method further comprises:
and if the region to be optimized contains the installed encryption screws, removing the encryption screws.
5. The method of claim 1, wherein the step of determining the position of the component having the resonance frequency lower than a preset frequency threshold as the region to be optimized comprises:
if the plurality of components with the resonance frequencies lower than a preset frequency threshold value are included, determining the distances among the plurality of components according to the positions of the plurality of components;
and acquiring the positions of a plurality of components of which the distances meet a preset distance threshold, and determining the area to be optimized according to the positions of the plurality of components.
6. The method of optimizing vibration performance of a printed circuit board according to claim 1, wherein the damping means is: and the rubber pad and/or the heat conducting rubber sheet.
7. The method for optimizing the vibration performance of the printed circuit board according to claim 1, wherein the preset frequency threshold is a lowest resonance frequency of the vehicle-mounted charger; wherein the lowest resonance frequency is not lower than 250 Hz.
8. A system for optimizing the vibration performance of a printed circuit board is used in the assembly process of the printed circuit board in a vehicle-mounted charger, and comprises:
the attribute data acquisition module is used for acquiring the attribute data of the printed circuit board;
the resonance frequency determining module is used for carrying out modal analysis on the printed circuit board according to the attribute data of the printed circuit board and determining the resonance frequency of each component in the printed circuit board;
the to-be-optimized region determining module is used for determining the position of the component with the resonance frequency lower than a preset frequency threshold as a to-be-optimized region;
and the resonant frequency optimization module is used for performing modal analysis on the printed circuit board after at least one damping device is installed on the area to be optimized until the resonant frequency of the area to be optimized is greater than the preset frequency threshold.
9. An electronic device, comprising: a processor and a storage device; the storage means has stored thereon a computer program which, when executed by the processor, implements the steps of the method of optimizing printed circuit board vibration performance according to any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for optimizing vibration performance of a printed circuit board according to any one of claims 1 to 7.
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| CN202110562544.7A CN113255276A (en) | 2021-05-21 | 2021-05-21 | Method and system for optimizing vibration performance of printed circuit board and electronic equipment |
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| US20070288873A1 (en) * | 2006-04-28 | 2007-12-13 | Nec Corporation | System for and method of analyzing printed board carrying chassis, printed board carrying chassis structure, program, and recording medium |
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Address after: 313300 No. 505, Wenchang Road, Dipu street, Anji County, Huzhou City, Zhejiang Province (self declaration) Applicant after: Zhejiang Fute Technology Co.,Ltd. Address before: 310000 1-5 / F, building 5, 6 xiyuanjiu Road, Xihu District, Hangzhou City, Zhejiang Province Applicant before: HANGZHOU EV-TECH CO.,LTD. |
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Application publication date: 20210813 |