Rapid judgment method, device, equipment and system for bus arrangement rationality and storage medium
By simplifying the film of the coated heated windshield glass into a basic circuit model, and using circuit principles to quickly calculate the square resistance of the film, the problems of high cost and long cycle of design rationality are solved, and efficient design verification is achieved.
Patent Information
- Application Number
- CN202411856286.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-03-25
AI Technical Summary
When designing coated heating front windshield glass, it is necessary to balance the heating area and light transmittance. The existing methods have problems such as high cost, verification hysteresis and long calculation period.
By simplifying the film of the coated heated windshield glass into a basic circuit model, the maximum and minimum values of the film square resistance are quickly calculated using the circuit principle, and the rationality of the design is judged based on the preset square resistance threshold.
It quickly judges the rationality of the design of coated heated windshield glass, reduces verification costs and shortens verification cycles, and avoids the problems of reduced light transmittance and hot spot formation.
Smart Images
Figure CN119692272A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of windshields, and in particular to a method, device, equipment, system and storage medium for quickly determining the rationality of busbar arrangement. Background Art
[0002] In cold weather, car glass is very easy to frost and fog, which will affect the vision of people in the car, so it is necessary to defrost and defog in time, especially for the front windshield of the car, which needs to provide the driver with a good field of vision to ensure driving safety and comfort. In recent years, coated heated front windshields have gradually become the mainstream development direction of car windshields. In order to ensure that the front windshield has sufficient field of vision under the condition of large temperature difference between inside and outside the car, it is necessary to ensure that the windshield has a suitable heating area for defrosting and defog when designing the windshield. Therefore, when designing the windshield in the early stage, the distance between the upper busbar and the lower busbar of the coated heated front windshield is generally designed to be large. However, when the distance between the upper busbar and the lower busbar of the coated heated windshield is large, the total resistance of the film of the coated heated windshield will be smaller. The square resistance is determined by the deposition process of the thin film resistance. The industry often uses the method of increasing the number of metal layers of magnetron sputtering to reduce the square resistance. The increase of metal layers means that the overall light transmittance of the glass is reduced, which will directly affect the driving safety of the driver and greatly increase the cost. In addition, the reduction of square resistance means that the local power is too large, the temperature rise of the glass per unit time is too large, and hot spots are formed in the area with excessive temperature, which can easily cause the glass to shatter and reduce the service life and safety of the windshield. Therefore, the distance between the upper busbar and the lower busbar of the coated heated windshield needs to balance the relationship between the windshield design and the actual coating process capabilities of the coated heated glass supplier.
[0003] In the prior art, there are two main methods for arranging the upper busbars and the lower busbars of the auxiliary coated heated windshield: first, physical verification is performed, that is, samples are manufactured according to the windshield design, and physical tests are performed under different environmental conditions. This method will increase the man-hours of manual testing and the cost of parts manufacturing, and the test results of the samples often lag far behind the structural design and cannot provide technical design guidance; second, simulation calculations are performed, that is, modeling is performed with the help of relevant professional finite element simulation software, the calculation model is corrected through a long period of test results, and a longer period of calculation is performed. Although this method is faster than the first method, the calculation cycle is still lengthy, and the calculation accuracy depends greatly on the experience of the staff. The accuracy of the calculation model requires a large amount of test data support. Summary of the invention
[0004] In order to solve at least one aspect of the above-mentioned problems, the present invention provides a method for quickly determining the rationality of busbar arrangement, comprising the following steps: obtaining a corresponding basic circuit model according to the design information of the current coated heated windshield, wherein the design information includes a target voltage, a target total heating power, and a maximum and minimum value of the distance between the upper busbar and the lower busbar; obtaining the heating power of the thin-film resistor per unit area based on the basic circuit model and the target total heating power and based on the circuit principle; obtaining the heating power of the thin-film resistor per unit area based on the basic circuit model, the target voltage, the heating power of the thin-film resistor per unit area, and the maximum value of the distance between the upper busbar and the lower busbar. and minimum value, based on the circuit principle, obtain the maximum and minimum values of the thin film square resistance; respectively compare the maximum and minimum values of the thin film square resistance with the preset square resistance threshold, wherein the preset square resistance threshold can realize the square resistance value determination according to the coating process of the coated heated windshield glass supplier; when the minimum value of the thin film square resistance is greater than the preset square resistance threshold, or the minimum value of the thin film square resistance is less than the preset square resistance threshold and the maximum value of the thin film square resistance is greater than the preset square resistance threshold, it is confirmed that the design of the current coated heated windshield glass is qualified; when the maximum value of the thin film square resistance is less than the preset square resistance threshold, it is confirmed that the design of the current coated heated windshield glass is unqualified.
[0005] Preferably, the method for obtaining the basic circuit model is to cut the current coated heated windshield glass along its width direction with a step length of W, and convert the film of the current coated heated windshield glass into a plurality of thin film resistors with a length equal to the distance between the upper busbar and the lower busbar and a width of W connected in parallel.
[0006] Preferably, the calculation formula of the thin film square resistance is:
[0007]
[0008] in, is the target voltage; is the heating power of the thin film resistor per unit area; is the distance between the upper busbar and the lower busbar; It is the thin film square resistance.
[0009] Preferably, the method further comprises the steps of: outputting qualified result information when confirming that the design of the current coated heated windshield is qualified; and outputting unqualified result information when confirming that the design of the current coated heated windshield is unqualified.
[0010] The present application also provides a device for quickly determining the rationality of busbar arrangement, the device comprising: an input module, configured to obtain a corresponding basic circuit model according to design information of a current coated heated windshield, wherein the design information comprises a target voltage, a target total heating power, and a maximum and minimum value of a distance between an upper busbar and a lower busbar; a first calculation module, configured to obtain a heating power of a thin film resistor per unit area based on the basic circuit model and the target total heating power, based on circuit principles; a second calculation module, configured to obtain a maximum and minimum value of a thin film square resistance based on the basic circuit model, the target voltage, the heating power of a thin film resistor per unit area, and a maximum and minimum value of a distance between an upper busbar and a lower busbar, based on circuit principles; a comparison module, configured to Respectively compare the maximum and minimum values of the thin film square resistance with the preset square resistance threshold, wherein the preset square resistance threshold can realize the determination of the square resistance value according to the coating process of the coated heated windshield supplier; a judgment module is configured to confirm that the design of the current coated heated windshield is qualified when the minimum value of the thin film square resistance is greater than the preset square resistance threshold, or the minimum value of the thin film square resistance is less than the preset square resistance threshold and the maximum value of the thin film square resistance is greater than the preset square resistance threshold; confirm that the design of the current coated heated windshield is unqualified when the maximum value of the thin film square resistance is less than the preset square resistance threshold; an output module is configured to output qualified result information when the design of the current coated heated windshield is confirmed to be qualified; and output unqualified result information when the design of the current coated heated windshield is confirmed to be unqualified.
[0011] The present application also provides a device for quickly determining the rationality of a busbar arrangement, the device comprising a memory and a processor, the memory storing a computer program, and implementing the above-mentioned method for quickly determining the rationality of a busbar arrangement when the computer program is executed by the processor.
[0012] Preferably, the device further comprises a display device for displaying qualified result information when outputting qualified result information, and for displaying unqualified result information when outputting unqualified result information.
[0013] Preferably, the device further comprises an interactive device for inputting design information including target voltage, target total heating power, maximum and minimum values of the distance between the upper busbar and the lower busbar, and a preset square resistance threshold.
[0014] The present application also provides a system for quickly determining the rationality of a busbar arrangement, comprising a display device, an interactive device and a device for quickly determining the rationality of a busbar arrangement as described above, wherein the display device and the interactive device are both communicatively connected to the rapid determination device; the interactive device is used to input design information including a target voltage, a target total heating power, a maximum value and a minimum value of the distance between an upper busbar and a lower busbar, and a preset square resistance threshold; the display device is used to receive qualified result information and unqualified result information, and display the qualified result information when the qualified result information is received, and display the unqualified result information when the unqualified result information is received.
[0015] The present application also provides a storage medium storing computer-readable instructions, and when the instructions are executed by a processor, the method described above is executed.
[0016] A method, device, equipment, system and storage medium for quickly determining the rationality of busbar arrangement of the present invention have the following beneficial effects:
[0017] This application simplifies the film of the coated heated windshield into a basic circuit model. According to the design information of the current coated heated windshield, the circuit principle can be used to quickly calculate the sheet resistance of the current coated heated windshield. Then, according to the coating process capability of the coated heated windshield supplier, it is judged whether the sheet resistance of the current coated heated windshield is qualified, thereby inferring whether the design of the current coated heated windshield is qualified. This application realizes the rapid judgment of the rationality of the preliminary design of the windshield, which not only overcomes the shortcomings of high cost and lagging behind of development work in physical verification, but also solves the problem of long simulation calculation cycle and great reliance on empirical algorithms, which helps to save verification costs and shorten verification cycles. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.
[0019] Figure 1 A flow chart showing a method for quickly determining the rationality of busbar arrangement according to an embodiment of the present invention is shown;
[0020] Figure 2 A basic circuit model diagram showing a method for quickly determining the rationality of busbar arrangement according to an embodiment of the present invention is shown;
[0021] Figure 3It shows a structural block diagram of a device for quickly determining the rationality of busbar arrangement according to an embodiment of the present invention;
[0022] Figure 4 It shows a structural block diagram of a device for quickly determining the rationality of busbar arrangement according to an embodiment of the present invention;
[0023] Figure 5 The structure block diagram of the system for quickly determining the rationality of busbar arrangement according to an embodiment of the present invention is shown.
[0024] Description of reference numerals:
[0025] 101. Input module; 103. Second calculation module; 104. Comparison module; 105. Judgment module; 106. Output module; 2. Rapid judgment device; 3. Memory; 4. Processor; 5. Display device; 6. Interaction device. DETAILED DESCRIPTION
[0026] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.
[0027] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.
[0028] In order to at least partially solve one or more of the above-mentioned problems and other potential problems, an embodiment of the present disclosure proposes a method for quickly determining the rationality of busbar arrangement, comprising the following steps: obtaining a corresponding basic circuit model based on the design information of the current coated heated windshield, wherein the design information includes the target voltage, the target total heating power, the three-dimensional geometric parameters of the windshield, and the maximum and minimum values of the distance between the upper busbar and the lower busbar; obtaining the heating power of the thin film resistor per unit area based on the basic circuit model and the target total heating power based on the circuit principle; obtaining the maximum and minimum values of the thin film square resistance based on the basic circuit model, the target voltage, the heating power of the thin film resistor per unit area, and the maximum and minimum values of the distance between the upper busbar and the lower busbar based on the circuit principle.
[0029] In a preferred embodiment, based on the characteristics that the thin film resistor is equivalent to no electron flow in the thickness direction and the characteristics that the pressure difference between two adjacent thin film resistors in the Y direction is small, the method for obtaining the basic circuit model is to cut the current coated heated windshield along its width direction with a step length of W, and convert the thin film of the current coated heated windshield into a number of thin film resistors with a length equal to the distance between the upper busbar and the lower busbar and a width of W connected in parallel.
[0030] Based on the circuit characteristics of thin film resistors, the target total heating power is equal to the power density (i.e., the heating power per unit area of thin film resistor) × the area of thin film resistor, that is, , is the target total heating power of the thin film resistor whose length is the distance L between the upper busbar and the lower busbar and whose width is W, is the heating power of the thin film resistor per unit area, is the area of the thin film resistor with a length equal to the distance L between the upper busbar and the lower busbar and a width W in the direction of the windshield profile, then .
[0031] Based on Ohm's law, , is the target voltage, is the resistance value of a thin film resistor whose length is the distance L between the upper busbar and the lower busbar and whose width is W.
[0032] Based on the calculation formula of thin film square resistance, is a thin film resistor.
[0033] The maximum distance between the upper busbar and the lower busbar and minimum value , substituting into the above formula, we can obtain the minimum value of the film square resistance and the maximum value of the sheet resistance of the film .
[0034] The method of the present application also includes the steps of: respectively comparing the maximum and minimum values of the thin film square resistance with the preset square resistance threshold, wherein the preset square resistance threshold can realize the determination of the square resistance value according to the coating process of the coated heated windshield glass supplier; when the minimum value of the thin film square resistance is greater than the preset square resistance threshold, or the minimum value of the thin film square resistance is less than the preset square resistance threshold and the maximum value of the thin film square resistance is greater than the preset square resistance threshold, confirming that the design of the current coated heated windshield glass is qualified; when the maximum value of the thin film square resistance is less than the preset square resistance threshold, confirming that the design of the current coated heated windshield glass is unqualified.
[0035] The method of the present application can be selected through manual calculation or machine calculation. When machine calculation is selected, the method of the present application also includes the steps of: when it is confirmed that the design of the current coated heated windshield is qualified, outputting the result qualified information; when it is confirmed that the design of the current coated heated windshield is unqualified, outputting the result unqualified information.
[0036] The present application also provides a device for quickly determining the rationality of busbar arrangement, such as Figure 3 As shown, the device includes: an input module 101, configured to obtain a corresponding basic circuit model according to design information of a current coated heated windshield, wherein the design information includes a target voltage, a target total heating power, and a maximum and minimum value of a distance between an upper busbar and a lower busbar; a first calculation module 102, configured to obtain a heating power of a thin film resistor per unit area based on the basic circuit model and the target total heating power and based on circuit principles; a second calculation module 103, configured to obtain a maximum and minimum value of a thin film resistor per unit area based on the basic circuit model, the target voltage, the heating power of a thin film resistor per unit area, and the maximum and minimum value of a distance between an upper busbar and a lower busbar and based on circuit principles; a comparison module 104, configured to compare the thin film resistors, respectively. The maximum and minimum values of the thin film square resistance are relative to the preset square resistance threshold, wherein the preset square resistance threshold can realize the determination of the square resistance value according to the coating process of the coated heated windshield supplier; a judgment module 105 is configured to confirm that the design of the current coated heated windshield is qualified when the minimum value of the thin film square resistance is greater than the preset square resistance threshold, or the minimum value of the thin film square resistance is less than the preset square resistance threshold and the maximum value of the thin film square resistance is greater than the preset square resistance threshold; when the maximum value of the thin film square resistance is less than the preset square resistance threshold, confirm that the design of the current coated heated windshield is unqualified; an output module 106 is configured to output qualified result information when confirming that the design of the current coated heated windshield is qualified; when confirming that the design of the current coated heated windshield is unqualified, output unqualified result information.
[0037] The present application also provides a device for quickly determining the rationality of busbar arrangement, such as Figure 4 As shown, the device includes a memory 3 and a processor 4, wherein the memory 3 stores a computer program, and when the computer program is executed by the processor 4, the above-mentioned method for quickly determining the rationality of busbar arrangement is implemented.
[0038] In a preferred embodiment, the device further comprises a display device 5, which is used to display qualified result information when outputting qualified result information, and to display unqualified result information when outputting unqualified result information. Preferably, the device further comprises an interactive device 6, which is used to input design information including target voltage, target total heating power, maximum and minimum values of the distance between the upper busbar and the lower busbar, and a preset square resistance threshold.
[0039] The present application also provides a system for quickly determining the rationality of busbar layout, such as Figure 5 As shown, it includes a display device 5, an interactive device 6 and a rapid determination device 2 for the rationality of a busbar arrangement as described above, wherein the display device 5 and the interactive device 6 are both communicatively connected to the rapid determination device 2; the interactive device 6 is used to input design information including target voltage, target total heating power, maximum and minimum values of the distance between the upper busbar and the lower busbar, and a preset square resistance threshold; the display device 5 is used to receive qualified result information and unqualified result information, and display the qualified result information when the qualified result information is received, and display the unqualified result information when the unqualified result information is received.
[0040] The present application also provides a storage medium storing computer-readable instructions, and when the instructions are executed by a processor, the method described above is executed.
[0041] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the present invention.
Claims
1. A method for quickly determining the rationality of busbar layout, characterized in that: The following steps are involved: According to the design information of the current coated heated windshield, a corresponding basic circuit model is obtained, wherein the design information includes a target voltage, a target total heating power, and a maximum value and a minimum value of a distance between an upper busbar and a lower busbar; According to the basic circuit model and the target total heating power, the heating power of the thin film resistor per unit area is obtained based on the circuit principle; According to the basic circuit model, the target voltage, the heating power of the thin film resistor per unit area, the maximum and minimum values of the distance between the upper busbar and the lower busbar, and based on the circuit principle, the maximum and minimum values of the thin film square resistance are obtained; Respectively comparing the maximum and minimum values of the sheet resistance of the thin film with the preset sheet resistance threshold, wherein the preset sheet resistance threshold can be determined according to the coating process of the coated heated windshield glass supplier to achieve a sheet resistance value; When the minimum value of the thin film square resistance is greater than the preset square resistance threshold, or the minimum value of the thin film square resistance is less than the preset square resistance threshold and the maximum value of the thin film square resistance is greater than the preset square resistance threshold, it is confirmed that the design of the current coated heated windshield is qualified; when the maximum value of the thin film square resistance is less than the preset square resistance threshold, it is confirmed that the design of the current coated heated windshield is unqualified.
2. The method for quickly determining the rationality of busbar arrangement according to claim 1 is characterized in that: The method for obtaining the basic circuit model is to cut the current coated heated windshield glass along its width direction with a step length of W, and convert the film of the current coated heated windshield glass into a plurality of thin film resistors with a length equal to the distance between the upper busbar and the lower busbar and a width of W connected in parallel.
3. The method for quickly determining the rationality of busbar layout according to claim 2 is characterized in that: The calculation formula of the thin film square resistance is: in, is the target voltage; is the heating power of the thin film resistor per unit area; is the distance between the upper busbar and the lower busbar; It is the thin film square resistance.
4. A method for quickly determining the rationality of busbar layout according to any one of claims 1 to 3, characterized in that: The method further includes the steps of: outputting qualified result information when confirming that the design of the current coated heated windshield is qualified; and outputting unqualified result information when confirming that the design of the current coated heated windshield is unqualified.
5. A device for quickly determining the rationality of busbar layout, characterized in that: The device comprises: An input module (101) is configured to obtain a corresponding basic circuit model according to design information of a current coated heated windshield glass, wherein the design information includes a target voltage, a target total heating power, and a maximum value and a minimum value of a distance between an upper busbar and a lower busbar; A first calculation module (102) is configured to obtain the heating power of the thin film resistor per unit area based on the basic circuit model and the target total heating power and based on the circuit principle; A second calculation module (103) is configured to obtain the maximum value and the minimum value of the thin film square resistance based on the basic circuit model, the target voltage, the heating power of the thin film resistor per unit area, the maximum value and the minimum value of the distance between the upper busbar and the lower busbar, and the circuit principle; A comparison module (104) is configured to compare the maximum and minimum values of the thin film square resistance with a preset square resistance threshold value, wherein the preset square resistance threshold value can be determined based on the coating process of the coated heated windshield glass supplier; A judgment module (105) is configured to confirm that the design of the current coated heated windshield is qualified when the minimum value of the thin film square resistance is greater than a preset square resistance threshold, or the minimum value of the thin film square resistance is less than the preset square resistance threshold and the maximum value of the thin film square resistance is greater than the preset square resistance threshold; and confirm that the design of the current coated heated windshield is unqualified when the maximum value of the thin film square resistance is less than the preset square resistance threshold; The output module (106) is configured to output qualified result information when confirming that the design of the current coated heated windshield is qualified; and output unqualified result information when confirming that the design of the current coated heated windshield is unqualified.
6. A device for quickly determining the rationality of busbar layout, characterized in that: The device comprises a memory (3) and a processor (4), wherein a computer program is stored in the memory (3), and when the computer program is executed by the processor (4), a method for quickly determining the rationality of a busbar arrangement as described in claim 4 is implemented.
7. A device (2) for quickly determining the rationality of busbar arrangement according to claim 6, characterized in that: The device also includes a display device (5) for displaying qualified result information when outputting qualified result information, and for displaying unqualified result information when outputting unqualified result information.
8. A device (2) for quickly determining the rationality of busbar arrangement according to claim 6 or 7, characterized in that: The device also includes an interactive device (6) for inputting design information including target voltage, target total heating power, maximum and minimum values of the distance between the upper busbar and the lower busbar, and a preset square resistance threshold.
9. A system for quickly determining the rationality of busbar layout, characterized in that: The invention comprises a display device (5), an interactive device (6) and a device (2) for quickly determining the rationality of a busbar arrangement as claimed in claim 6, wherein the display device (5) and the interactive device (6) are both connected in communication with the quick determination device (2); the interactive device (6) is used to input design information including a target voltage, a target total heating power, a maximum value and a minimum value of a distance between an upper busbar and a lower busbar, and a preset square resistance threshold; The display device (5) is used for receiving qualified result information and unqualified result information, and for displaying the qualified result information when the qualified result information is received, and for displaying the unqualified result information when the unqualified result information is received.
10. A storage medium storing computer-readable instructions, wherein when the instructions are executed by a processor, the method according to claim 4 is executed.