CN113158130A - Method, equipment and medium for calculating radiance of shielding part of spindle of double-sided component - Google Patents
Method, equipment and medium for calculating radiance of shielding part of spindle of double-sided component Download PDFInfo
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Abstract
The invention discloses a method, equipment and a medium for calculating radiance of a shielding part of a spindle of a double-sided component, wherein the method comprises the following steps: acquiring the length D1 of the assembly, the width D2 of a main shaft, the maximum incident angle alpha of the light ray on the back surface of the first assembly and the maximum incident angle beta of the light ray on the back surface of the second assembly; according toAnd acquiring direct radiance at the shielding position of the main shaft S1. The invention has the technical effects that: the proportion of the power of the batteries irradiated on the battery pieces from the two sides of the main shaft to the total theoretical radiation quantity of the back of the assembly is calculated, the defect that the calculation is simply carried out according to the length of the assembly and the width of the main shaft in the prior technical scheme is overcome, the estimation of the power of the batteries irradiated on the battery pieces from the two sides of the main shaft to the total theoretical radiation quantity of the back of the assembly is realized, and the estimation precision of the power influence on the main shaft is further improved.
Description
Technical Field
The invention relates to the field of photovoltaic power generation, in particular to a method, equipment and medium for calculating radiance of a spindle shielding part of a double-sided assembly.
Background
For a vertically mounted dual-sided assembly mounted on a flat single-axis tracker, generally the central location of the back of the dual-sided assembly is shielded by the spindle, which mainly affects the back radiation near the spindle. In the conventional technical scheme, a common algorithm of the back shielding rate does not consider the height condition of a main shaft from the back of the component, and the back shielding ratio of the double-sided component is directly designed as the shielding rate, but the method can amplify the shielding effect, and the reason for the shielding is that although the main shaft blocks part of light rays, shadow is generated on a cell, actually, because the direction of the light rays is indefinite, the shadow part can still generate power, but an effective estimation means is lacked for the occupied ratio influence of the part of power on the original power.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method, equipment and a medium for calculating the radiance of a spindle shielding part of a double-sided component, wherein the specific technical scheme is as follows:
in another aspect, a method for calculating radiance of a spindle shielding part of a double-sided assembly is provided, which includes:
acquiring the length D1 of the assembly, the width D2 of a main shaft, the maximum incident angle alpha of the light ray on the back surface of the first assembly and the maximum incident angle beta of the light ray on the back surface of the second assembly;
and acquiring the direct radiance S1 of the shielding position of the main shaft according to the component length D1, the main shaft width D2, the maximum incident angle alpha of the light ray on the back surface of the first component and the maximum incident angle beta of the light ray on the back surface of the second component.
In the technical scheme, the proportion of the power of the batteries irradiated on the battery pieces from the two sides of the main shaft to the total theoretical radiation quantity of the back of the assembly is calculated, so that the defect that the power of the batteries irradiated on the battery pieces from the two sides of the main shaft to the total theoretical radiation quantity of the back of the assembly is overcome, the estimation of the power of the batteries irradiated on the battery pieces from the two sides of the main shaft to the total theoretical radiation quantity of the back of the assembly is realized, and the estimation accuracy of the power influence generated on the main shaft is further improved.
in another aspect, a method for calculating a back radiation shielding rate of a double-sided assembly is provided, which includes:
obtaining the direct radiance S1 of the spindle shielding position according to the calculation method of the radiance of the spindle shielding position of the double-sided component;
acquiring radiance of the unmasked part of the back surface S2;
and obtaining a back rough radiance S 'according to the main shaft shielding position direct radiance S1 and the back shielding position radiance S2, wherein the back rough radiance S' is S1+ S2.
In the technical scheme, the condition that the effective radiation quantity of the front side of the assembly leaks to the back side due to the existence of the distance between the assembly junction box and the battery plate and is reflected by the spindle is calculated, so that the spindle reflectivity is estimated, and the estimation accuracy of the power influence on the spindle is further improved.
further preferably, the method further comprises the following steps:
acquiring a distance D3 between a junction box and a battery piece of the assembly, effective radiation quantity Leff of the front side of the assembly, reflectivity Att of a main beam, theoretical radiation quantity Ir of the back side of the assembly, the number a of battery pieces influenced by the shadow of the main beam and the total number b of the battery pieces;
and acquiring the main shaft reflection radiant quantity Ir3 according to the distance D3 between the assembly junction box and the battery plates, the effective radiant quantity Leff of the front side of the assembly, the reflectivity Att of the main beam, the theoretical radiant quantity Ir of the back side of the assembly, the number a of the battery plates influenced by the shadow of the main beam and the total number b of the battery plates.
preferably, the method further comprises the following steps:
acquiring a main shaft reflectivity S3 according to the S3-Ir 3/Ir;
the rear surface shading rate S is obtained from S ═ 1- (S' + S3).
Preferably, the method further comprises the following steps: obtaining an angular radiance Ir1 according to Ir 1-Ir × S1;
or/and:
acquiring direct radiation Ir2 of the cell according to Ir 2-Ir × S2;
obtaining a coarse radiation amount Ir 'according to Ir' ═ Ir × S1+ Ir × S2;
or/and:
the fine radiation amount Ir0 is obtained from Ir0 ═ Ir1+ Ir2+ Ir 3.
In another aspect, an electronic device is provided, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, where the processor is configured to execute the computer program stored in the memory, and implement the method for calculating radiance at a spindle shield of a dual-sided assembly.
In another aspect, a medium is provided, and at least one instruction is stored in the medium and loaded and executed by a processor to implement the method for calculating radiance at spindle shielding of a double-sided assembly.
The invention at least comprises the following technical effects:
(1) the proportion of the power of the batteries irradiated on the battery pieces from the two sides of the main shaft to the total theoretical radiation quantity of the back of the assembly is calculated, so that the defect of simple calculation according to the length of the assembly and the width of the main shaft in the original technical scheme is overcome, the estimation of the power of the batteries irradiated on the battery pieces from the two sides of the main shaft to the total theoretical radiation quantity of the back of the assembly is realized, and the estimation precision of the power influence on the main shaft is further improved;
(2) the effective radiation quantity of the front side of the assembly, which is caused by the existence of the distance between the assembly junction box and the battery plate, is leaked to the back side of the assembly and is reflected by the spindle, so that the spindle reflectivity is estimated, and the estimation accuracy of the power influence on the spindle is further improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic flow chart of example 1 of the present invention;
FIG. 2 is a schematic flow chart of example 2 of the present invention;
fig. 3 is a schematic view of an application scenario of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically depicted, or only one of them is labeled. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1:
as shown in fig. 1 and 3, the present embodiment provides a method for calculating radiance at a spindle shielding position of a double-sided assembly, including:
step 1: acquiring the length D1 of the assembly, the width D2 of a main shaft, the maximum incident angle alpha of the light ray on the back surface of the first assembly and the maximum incident angle beta of the light ray on the back surface of the second assembly;
step 2: obtaining the direct radiance S1 of the shielding position of the main shaft according to the component length D1, the main shaft width D2, the maximum incident angle alpha of the light ray on the back surface of the first component and the maximum incident angle beta of the light ray on the back surface of the second component; preferably, according toAnd acquiring direct radiance at the shielding position of the main shaft S1.
In the conventional art, the influence of the bracket on the photovoltaic power generation is generally calculated by comparing the width of the back shield with the width of the upper module, and simply, directlyThe influence of the existence of the shielding object on the power is calculated to judge the influence of the generated power, but in the actual use process, the method directly designs the shielding ratio of the back of the double-sided component as the shielding rate without considering the height condition of the main shaft from the back of the component, so that the shielding influence can be amplified.
In the present embodiment, the influence of the height of the spindle from the back of the module on the power generation is determined according to the height of the spindle from the back of the module, specifically, although the existence of the spindle causes shadow on the back, it is known that the existence of the spindle shadow does not mean that no light exists at all, that is, the battery pieces at the position of the spindle shadow still generate a certain power, so that firstly, according to D2/D1, the proportion of the battery pieces affected by the existence of the spindle is calculated, and then, according to the proportion of the battery pieces affected by the existence of the spindle, the power generation is calculatedThe existence of the spindle is used to obtain how many angle ranges of the light can reach the battery plates, and the two are multiplied, so as to finally obtain the direct radiance S1 at the blocking position of the spindle, namely the power retention of the battery plates influenced by the spindle under the existence of the spindle, specifically,wherein the minimum value of alpha + beta can be represented by the formulaCalculated, the maximum value of α + β can be calculated by the formulaGenerally, α + β is calculated by the formula of 110 ° to 126 °, Ieff/Ir is 9.5, a/b is 1/12, Att is 40%, and the back surface shielding rate is calculated to be about 1.5% to 2.1%.
In the embodiment, the proportion of the power of the batteries irradiated on the battery pieces from the two sides of the main shaft to the total theoretical radiation quantity of the back of the assembly is calculated, so that the defect of simple calculation according to the length of the assembly and the width of the main shaft in the prior technical scheme is overcome, the estimation of the power of the batteries irradiated on the battery pieces from the two sides of the main shaft to the total theoretical radiation quantity of the back of the assembly is realized, and the estimation precision of the power influence on the main shaft is further improved.
Example 2:
as shown in fig. 2 and 3, the present embodiment provides a method for calculating radiance at a spindle shielding position of a dual-surface assembly, including:
step 1: acquiring the length D1 of the assembly, the width D2 of a main shaft, the maximum incident angle alpha of the light ray on the back surface of the first assembly and the maximum incident angle beta of the light ray on the back surface of the second assembly;
Step 3: acquiring radiance of the unmasked part of the back surface S2; preferably, according toAcquiring radiance of the unmasked part of the back surface S2;
step 4: and obtaining the rough radiance S 'according to the S' of S1+ S2.
In the present embodiment, not only the spindle shielding direct radiance S1 but also the overall radiance is evaluated, specifically, the radiance of the back shielding-free portion, that is, the radiance of the portion that is not affected by the existence of the spindle, is calculated, and then the spindle shielding direct radiance S1 and the back shielding-free radiance S2 are simply superimposed to obtain the rough radiance.
Preferably, the method further comprises the following steps: step 5: acquiring a distance D3 between a junction box and a battery piece of the assembly, effective radiation quantity Leff of the front side of the assembly, reflectivity Att of a main beam, theoretical radiation quantity Ir of the back side of the assembly, the number a of battery pieces influenced by the shadow of the main beam and the total number b of the battery pieces;
step 7: acquiring a main shaft reflectivity S3 according to the S3-Ir 3/Ir;
step 8: the rear surface shading rate S is obtained from S ═ 1- (S' + S3).
In the embodiment, considering the existence of the module junction box and the battery plate, a distance exists between the module junction box and the battery plate, light can pass through the distance, then the light irradiates on the spindle, and then the light is reflected from the spindle to the back surface of the module to generate power, so that the power leaked to the back surface due to the existence of the distance D3 is obtained through D3/D1 XLeff, then the proportion of the power leaked to the back surface by the back surface module to be dissipated is calculated according to a/b XAtt, then the two are multiplied, so that the spindle reflected radiation amount Ir3 is obtained, and further the back surface shading rate S due to the existence of the spindle is obtained.
According to the method and the device, the effective radiation quantity of the front side of the assembly, which is caused by the existence of the distance between the assembly junction box and the battery plate, is leaked to the back side and is reflected by the spindle, so that the spindle reflectivity is estimated, and the accuracy of the estimation of the power influence on the spindle is further improved.
Further preferably, the method further comprises the following steps:
step 9: obtaining an angular radiance Ir1 according to Ir 1-Ir × S1;
step 10: acquiring direct radiation Ir2 of the cell according to Ir 2-Ir × S2;
step 11: obtaining a coarse radiation amount Ir 'from Ir ═ Ir1+ Ir2 or from Ir ═ Ir × S';
step 12: the fine radiation amount Ir0 is obtained from Ir0 ═ Ir' + Ir3 or from Ir0 ═ Ir1+ Ir2+ Ir 3.
In this embodiment, in addition to calculating the occlusion rate, the radiation amount should be further calculated, so as to provide guidance for subsequent production scheduling.
Example 3
The embodiment provides an electronic device, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, where the processor is configured to execute the computer program stored in the memory, and implement the method for calculating the radiance at the spindle shielding position of the dual-sided assembly according to embodiment 1 or 2.
The device can be a desktop computer, a notebook, a palm computer, a tablet computer, a mobile phone, a man-machine interaction screen and the like. The apparatus may include, but is not limited to, a processor, a memory. Those skilled in the art will appreciate that the device is merely an example and not a limitation of the device, and may include more or less components than those shown, or some components in combination, or different components, as exemplary: the device may also include input/output interfaces, display devices, network access devices, communication buses, communication interfaces, and the like. A communication interface and a communication bus, and may further comprise an input/output interface, wherein the processor, the memory, the input/output interface and the communication interface complete communication with each other through the communication bus. The memory stores a computer program, and the processor is used for executing the computer program stored on the memory to realize the method in the embodiment.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may be an internal storage unit of the device, exemplary: hard disk or memory of the device. The memory may also be an external storage device of the device, for example: the equipment comprises a plug-in hard disk, an intelligent memory Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) and the like. Further, the memory may also include both internal storage units of the device and external storage devices. The memory is used for storing the computer program and other programs and data required by the device. The memory may also be used to temporarily store data that has been output or is to be output.
A communication bus is a circuit that connects the described elements and enables transmission between the elements. Illustratively, the processor receives commands from other elements via the communication bus, decrypts the received commands, and performs calculations or data processing based on the decrypted commands. The memory may include program modules, illustratively, a kernel (kernel), middleware (middleware), an Application Programming Interface (API), and applications. The program modules may be comprised of software, firmware or hardware, or at least two of the same. The input/output interface forwards commands or data input by a user via the input/output interface (e.g., sensor, keypad, touch screen). The communication interface connects the device with other network devices, user equipment, networks. For example, the communication interface may be connected to the network by wire or wirelessly to connect to other external network devices or user devices. The wireless communication may include at least one of: wireless fidelity (WiFi), Bluetooth (BT), Near Field Communication (NFC), Global Positioning Satellite (GPS) and cellular communications, among others. The wired communication may include at least one of: universal Serial Bus (USB), high-definition multimedia interface (HDMI), asynchronous transfer standard interface (RS-232), and the like. The network may be a telecommunications network and a communications network. The communication network may be a computer network, the internet of things, a telephone network. The device may connect to the network through the communication interface, and a protocol by which the device communicates with other network devices may be supported by at least one of an application, an Application Programming Interface (API), middleware, a kernel, and a communication interface.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/device and method may be implemented in other ways. The above-described apparatus/device embodiments are merely exemplary, and the division of the modules or units is merely an example of a logical division, and there may be other divisions in actual implementation, and it is exemplary that 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 some interfaces, devices or units, 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 application 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 integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units may be stored in a medium if implemented in the form of software functional units and sold or used as separate products. Based on such understanding, all or part of the flow in the method according to the above embodiments may be implemented by sending instructions to relevant hardware through a computer program, where the computer program may be stored in a medium, and when the computer program is executed by a processor, the steps of the above method embodiments may be implemented. Wherein the computer program may be in source code form, object code form, an executable file or some intermediate form, etc. The medium may include: any entity or device capable of carrying the computer program, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signal, telecommunication signal, software distribution medium, etc. It should be noted that the content contained in the medium can be increased or decreased as appropriate according to the requirements of legislation and patent practice in the jurisdiction, and the following are exemplary: in some jurisdictions, in accordance with legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunications signals. It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of program modules is illustrated, and in practical applications, the above-described distribution of functions may be performed by different program modules, that is, the internal structure of the apparatus may be divided into different program units or modules to perform all or part of the above-described functions. Each program module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one processing unit, and the integrated unit may be implemented in a form of hardware, or may be implemented in a form of software program unit. In addition, the specific names of the program modules are only used for distinguishing the program modules from one another, and are not used for limiting the protection scope of the application.
Example 4:
the present embodiment provides a medium, in which at least one instruction is stored, and the instruction is loaded and executed by a processor to implement the method for calculating the radiance at the spindle shielding position of the double-sided assembly according to embodiment 1 or 2.
Example 5:
the embodiment provides a method for calculating radiance of a spindle shielding part of a double-faced assembly, which comprises the following steps:
step 1: and calculating the back face receiving radiation subareas of the assembly, namely firstly, the part which is not influenced by shielding, secondly, the part which is influenced by the shielding of the main shaft, and thirdly, after the position of the junction box in the middle of the back face of the assembly is enlarged, part of light rays penetrate through assembly glass and then are reflected to the back face of the assembly from the main shaft.
Step 2: the part that is not affected by the occlusion is calculated,this part of the calculation is easy to understand, i.e. the unobstructed dimension is longer than the upper double-sided assembly back.
And step 3: the portion of the direct occlusion is calculated,the part calculates the maximum incident angles alpha and beta of the light on the back of the key value component, which means that the component and the back support have a certain distance and a certain range of receivable angles.
And 4, step 4: calculating the gap between the battery plates in the assembly, reflecting the light rays to the battery plates after the light rays penetrate through the glass from the gap and reach the main shaft,the part calculates the key value to increase the reflectivity of the back support material.
And 5: the back radiation calculation results of the subareas are synthesized and compared with the back radiation receiving amount of the double-sided component when the back is not shielded,and obtaining the back shielding rate of the double-sided assembly.
The embodiment further improves the accuracy of estimating the influence of the power generated by the main shaft by calculating the condition that the effective radiation quantity of the front surface of the assembly leaks to the back surface and is reflected by the main shaft due to the existence of the distance between the assembly junction box and the battery plate and calculating the proportion of the power irradiated to the battery plate from the two sides of the main shaft to the theoretical radiation quantity of the back surface of the assembly.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for calculating radiance of a shielding part of a spindle of a double-sided assembly is characterized by comprising the following steps:
acquiring the length D1 of the assembly, the width D2 of a main shaft, the maximum incident angle alpha of the light ray on the back surface of the first assembly and the maximum incident angle beta of the light ray on the back surface of the second assembly;
and acquiring the direct radiance S1 of the shielding position of the main shaft according to the component length D1, the main shaft width D2, the maximum incident angle alpha of the light ray on the back surface of the first component and the maximum incident angle beta of the light ray on the back surface of the second component.
3. A method for calculating the back radiation shielding rate of a double-sided assembly is characterized by comprising the following steps:
the calculation method of radiance at spindle shielding part of a double-sided assembly according to claim 1 obtains direct radiance at spindle shielding part S1;
acquiring radiance of the unmasked part of the back surface S2;
and obtaining a back rough radiance S 'according to the main shaft shielding position direct radiance S1 and the back shielding position radiance S2, wherein the back rough radiance S' is S1+ S2.
5. The method for calculating the back radiation shielding rate of the double-sided assembly according to claim 3, further comprising:
acquiring a distance D3 between a junction box and a battery piece of the assembly, effective radiation quantity Leff of the front side of the assembly, reflectivity Att of a main beam, theoretical radiation quantity Ir of the back side of the assembly, the number a of battery pieces influenced by the shadow of the main beam and the total number b of the battery pieces;
and acquiring the main shaft reflection radiant quantity Ir3 according to the distance D3 between the assembly junction box and the battery plates, the effective radiant quantity Leff of the front side of the assembly, the reflectivity Att of the main beam, the theoretical radiant quantity Ir of the back side of the assembly, the number a of the battery plates influenced by the shadow of the main beam and the total number b of the battery plates.
7. The method for calculating the back radiation shielding rate of the double-sided assembly according to claim 5, further comprising:
acquiring a main shaft reflectivity S3 according to the S3-Ir 3/Ir;
the rear surface shading rate S is obtained from S ═ 1- (S' + S3).
8. The method for calculating the back radiation shielding rate of the double-sided assembly according to claim 5, further comprising:
obtaining an angular radiance Ir1 according to Ir 1-Ir × S1;
or/and:
acquiring direct radiation Ir2 of the cell according to Ir 2-Ir × S2;
obtaining a coarse radiation amount Ir 'according to Ir' ═ Ir × S1+ Ir × S2;
or/and:
the fine radiation amount Ir0 is obtained from Ir0 ═ Ir1+ Ir2+ Ir 3.
9. An electronic device comprising a processor, a memory and a computer program stored in the memory and executable on the processor, wherein the processor is configured to execute the computer program stored in the memory to implement the method for calculating the radiance at the spindle shielding position of the double-sided assembly according to any one of claims 1 to 7.
10. A medium having stored therein at least one instruction that is loaded and executed by a processor to perform a method of calculating radiance at a principal axis occlusion of a bifacial assembly of any of claims 1 to 7.
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CN202110255594.0A CN113158130B (en) | 2021-03-09 | 2021-03-09 | Method, equipment and medium for calculating emissivity of shielding part of spindle of double-sided assembly |
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