Tension testing system and tension testing method

Abstract

The embodiment of the invention relates to the photovoltaic field, and provides a tension testing system and a tension testing method.The tension testing system comprises a bearing table, a tension testing device and a tension testing device, the bearing table is used for bearing a silk-screen printing plate, and a plurality of testing point positions and knocking point positions are arranged on the bearing table; the tension testing device comprises a testing base, a gravity sensor is arranged in the testing base, the testing base is located on the surface of the silk-screen printing plate and right faces the testing point positions, and the gravity sensor is used for testing the tension of the surface of the silk-screen printing plate at the position corresponding to each testing point position after the stress of the knocking point position is recovered; the display screen displays the tension, obtained by the gravity sensor, of the surface of the silk-screen printing plate; the processor is electrically connected with the tension testing device and used for obtaining the tension of the surface of the silk-screen printing plate at the position corresponding to each testing point position and calculating the average value, and the average value is used for representing the surface tension of the silk-screen printing plate. The accuracy of tension testing can be improved.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the photovoltaic field, and in particular to a tension testing system and a tension testing method. Background Art

[0002] In the process of manufacturing solar cells, metal conductive paste is printed on the surface of the cell according to the designed pattern using a screen to form electrode grid lines. The quality of grid line printing affects the photoelectric conversion efficiency and component life of solar cells, while the quality of the screen directly affects the quality of the final printed cell and the printing cost. Therefore, it is necessary to test the quality of the screen before it is put into use to ensure the consistency of the quality of different batches of screens used in the same batch of solar cells.

[0003] Currently there is a problem that the surface tension test of screen printing screens is not accurate enough. Summary of the invention

[0004] The embodiments of the present disclosure provide a tension testing system and a tension testing method, which can at least improve the accuracy of the surface tension test of a screen printing screen.

[0005] According to some embodiments of the present disclosure, on the one hand, an embodiment of the present disclosure provides a tension testing system, comprising: a load platform, the load platform is used to carry a screen printing screen, and a plurality of test points and knocking points are arranged on the load platform; a tension testing device, the tension testing device comprising: a test base, the test base comprises a gravity sensor, the test base is located on the surface of the screen printing screen, facing the test points, the gravity sensor is used to test the tension of the screen printing screen surface at each position corresponding to the test point after the force at the knocking point is restored; a display screen, the display screen displays the tension of the screen printing screen surface acquired by the gravity sensor; a processor, the processor is electrically connected to the tension testing device, and is used to acquire the tension of the screen printing screen surface at each position corresponding to the test point and calculate an average value, the average value is used to characterize the surface tension of the screen printing screen.

[0006] In some embodiments, the number of the test points is N, N is an odd number greater than or equal to 3, the central axis of one of the test points coincides with the central axis of the screen printing screen, and the central axes of the remaining test points coincide with the central axes of each of the screen printing screen divided into N-1 equal parts, or, N is an odd number greater than or equal to 2, and the central axes of the test points coincide with the central axes of each of the screen printing screen divided into N equal parts.

[0007] In some embodiments, the number of the test points is M, M=2 m+1, the central axis of one of the test points coincides with the central axis of the screen printing screen, and the central axes of the remaining test points coincide with the central axes of each of the screen printing screen divided into M-1 equal parts in two mutually perpendicular directions, or, M=2 m The central axis of the test point coincides with the central axis of each of the M equal parts of the screen printing screen along two directions perpendicular to each other, where m is an integer greater than 1.

[0008] In some embodiments, the number of the test points is an odd number, the number of the knocking points is two, the two knocking points are located on both sides of the test point whose central axis coincides with the central axis of the screen printing screen, and the distance between the two knocking points and the test point is equal.

[0009] In some embodiments, the test point is a projection pattern, and the surface of the carrier platform also has a target pattern, and the target pattern corresponds to the projection pattern. The tension testing system also includes: a light source, which is located on a side of the target pattern away from the screen printing screen, and is used to provide light to the target pattern to project the target pattern onto the surface of the screen printing screen to form the projection pattern.

[0010] In some embodiments, it also includes: a level testing device, which is fixed on the supporting platform and is used to test whether the surface of the screen printing screen is level.

[0011] In some embodiments, it also includes: a horizontal adjustment device, which is fixed to the bottom surface of the support platform and is used to adjust the height of each part of the support platform according to the test results of the horizontal testing device.

[0012] According to some embodiments of the present disclosure, on the other hand, the embodiments of the present disclosure further provide a tension testing method, comprising: providing a supporting platform, wherein a plurality of test points and knocking points are provided on the supporting platform; placing a screen printing screen, wherein the screen printing screen covers the surface of the supporting platform; testing each of the test points in turn, wherein the steps of testing the test points comprise: placing a tension testing device, wherein the tension testing device is located on the surface of the screen printing screen, directly opposite to the test points; knocking at least once at the knocking points, and testing the surface tension of the screen printing screen through the tension testing device after the knocking points are restored; obtaining the surface tension of the screen printing screen at the corresponding position of each of the test points and calculating an average value, wherein the average value is used to characterize the surface tension of the screen printing screen.

[0013] In some embodiments, before testing each of the test points, the method further includes: testing whether the surface of the carrier platform is horizontal; if the surface of the carrier platform is tilted, adjusting the angle of the carrier platform to make the surface of the carrier platform horizontal.

[0014] In some embodiments, before calculating the average value, it also includes: determining whether there is an abnormal value on the surface tension of the screen printing screen at the position corresponding to each test point, and if there is an abnormal value, re-testing each test point.

[0015] The technical solution provided by the embodiments of the present disclosure has at least the following advantages: before testing, force is applied to the knocking points so that the surface of the screen printing screen laid on the supporting platform is made smoother, thereby improving the accuracy of subsequent tests; thereafter, the surface tension of the screen printing screen is tested by a tension testing device, and the tension data of the current test point is displayed on a display screen; by repeating the above-mentioned process at each test point and obtaining the average value of the tension of multiple test points through processing, the accuracy of the test can be further improved, thereby avoiding deviations at any test point that may lead to misjudgment of the surface tension of the test screen printing screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings, and these exemplified descriptions do not constitute a limitation on the embodiments. Unless otherwise specified, the pictures in the drawings do not constitute a scale limitation. In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the traditional technology, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a tension testing system provided by an embodiment of the present disclosure;

[0018] Figure 2 A perspective view of a tension testing system provided for an embodiment of the present disclosure;

[0019] Figure 3 A structural schematic diagram of a printing screen and positions corresponding to test points provided in an embodiment of the present disclosure;

[0020] Figure 4 A flow chart of a tension testing method provided in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] As can be seen from the background technology, the current screen printing screen is thin, has a small bearing weight, and requires high tension accuracy. Therefore, it is necessary to provide a tension testing system to improve the accuracy of the test of the surface tension of the screen printing screen.

[0022] The disclosed embodiment provides a tension testing system, which, before testing, applies force to the striking points so that the surface of the screen printing screen laid flat on the support table is made smoother, thereby improving the accuracy of subsequent tests. Thereafter, the surface tension of the screen printing screen is tested by a tension testing device, and the tension data of the current test point is displayed on a display screen. By repeating the above process at each test point and obtaining the average value of the tensions of multiple test points through processing, the accuracy of the test can be further improved, thereby avoiding deviations at any test point that may lead to misjudgment of the surface tension of the test screen printing screen.

[0023] In the description of the embodiments of the present disclosure, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present disclosure, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present disclosure. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] In the description of the embodiments of the present disclosure, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0026] In the description of the embodiments of the present disclosure, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0027] In the description of the embodiments of the present disclosure, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description. They do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the embodiments of the present disclosure.

[0028] In the description of the embodiments of the present disclosure, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0029] In the accompanying drawings corresponding to the embodiments of the present disclosure, the thickness and area of ​​the layers are magnified for better understanding and ease of description. When describing a component (such as a layer, a film, a region or a substrate) on another component or on the surface of another component, the component may be "directly" located on the surface of the other component, or a third component may be present between the two components. On the contrary, when describing a component on the surface of another component or when another component is formed or provided on the surface of a component, it means that there is no third component between the two components. In addition, when describing a component as being "substantially" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a partial edge of the entire surface.

[0030] In the description of the embodiments of the present disclosure, when a component "includes" another component, unless otherwise specified, other components are not excluded, and other components may be further included. In addition, when a component such as a layer, a film, a region, or a plate is referred to as being "on / located on" another component, it may be "directly on" the other component (i.e., located on the surface of the other component with no other components between them), or another component may exist in between. In addition, when a component such as a layer, a film, a region, a plate, etc. is "directly located on" another component, or when a component such as a layer, a film, a region, a plate, etc. is located on the surface of another component, it means that no other components are located in between.

[0031] The terms used in the description of the various embodiments described herein are only used to describe specific embodiments and are not intended to be limiting. As used in the description of the various embodiments described and in the appended claims, "the components" are also intended to include plural forms unless the context clearly indicates otherwise. Among them, components include components such as layers, films, regions, or plates.

[0032] The following will describe the various embodiments of the present disclosure in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present disclosure, many technical details are provided in order to enable the reader to better understand the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present disclosure can be implemented.

[0033] refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the three-dimensional structure of a tension testing system provided by an embodiment of the present disclosure is shown in FIG. Figure 2 A perspective view of a tension testing system provided in accordance with an embodiment of the present disclosure.

[0034] In some embodiments, the tension testing system is used in the photovoltaic field and may include: a carrying platform 100 , the carrying platform 100 is used to carry a screen printing screen 101 , and a plurality of testing points 110 and knocking points 120 are provided on the carrying platform 100 .

[0035] The tension testing system may also include: a tension testing device 102, the tension testing device 102 includes: a test base 112, the test base 112 includes a gravity sensor, the test base 112 is located on the surface of the screen printing screen 101, facing the test point 110, the gravity sensor is used to test the tension on the surface of the screen printing screen 101 at the corresponding position of each test point 110 after the force at the tapping point 120 is restored; a display screen 122, the display screen 122 displays the surface tension of the screen printing screen 101 obtained by the gravity sensor.

[0036] The tension testing system may also include: a processor (not shown), which is electrically connected to the tension testing device 102 and is used to obtain the surface tension of the screen printing screen 101 at the corresponding position of each test point 110 and calculate an average value, which is used to characterize the surface tension of the screen printing screen 101.

[0037] The disclosed embodiment provides a tension testing system. Before the test, a force is applied to the striking point 120 so that the surface of the screen printing screen 101 laid flat on the supporting platform 100 is made smoother, thereby improving the accuracy of subsequent tests. Thereafter, the surface tension of the screen printing screen 101 is tested by the tension testing device 102, and the tension data of the current test point 110 is displayed on the display screen 122. By repeating the above process at each test point 110 and obtaining the average value of the tension of multiple test points 110 through processing, the accuracy of the test can be further improved, thereby avoiding deviations at any test point 110 that may lead to misjudgment of the surface tension of the test screen printing screen 101.

[0038] In some embodiments, the carrier platform 100 can carry the screen printing screen 101 by directly laying the screen printing screen 101 on the surface of the carrier platform 100, or, through the spacing between the surface of the carrier platform 100 and the bottom surface of the screen printing screen 101, the carrier platform 100 can clamp the screen printing screen 101 to the side wall of the carrier platform 100 by clamping, so that the screen printing screen 101 is suspended in the air.

[0039] The test point 110 is a projection pattern, and the surface of the carrier platform 100 also has a target pattern, which corresponds to the projection pattern. The tension testing system also includes: a light source 103, which is located on the side of the target pattern away from the screen printing screen 101, and is used to provide the light source 103 to the target pattern to project the target pattern onto the surface of the screen printing screen 101 to form a projection pattern.

[0040] For example, the position corresponding to the target pattern on the surface of the carrier 100 is a transparent layer, and the light of the light source 103 can penetrate the transparent layer to irradiate the surface of the screen printing screen 101. The light of the light source 103 cannot penetrate the surface of the carrier 100 except the position corresponding to the target pattern. In this way, a light spot, i.e., a projection pattern, can be formed on the surface of the screen printing screen 101. In this way, the tension testing device 102 can be directly matched with the position of the projection pattern. Similarly, the knocking point 120 can also be irradiated to the transparent layer by the light source 103 to form a light spot on the surface of the screen printing screen 101. By adopting the projection pattern method, the entire test process can be simplified. It is not necessary to find the location of the test point 110 for each test of a screen printing screen 101, or it is not necessary to perform additional steps to find the location of the test point 110 for each test of a screen printing screen 101. Another convenience is that it is easy to achieve through the cooperation of the light source 103 and the target pattern and the cost is low.

[0041] In some embodiments, a plurality of through holes may be provided on the surface of the carrier 100, and the positions of the through holes correspond to the positions of the test points 110 and the knocking points 120. Similarly, the tension testing system may also include: a light source 103, and the light source 103 is located on the side of the through hole away from the screen printing screen 101, so that when the light source 103 is on, the part that can pass the light is the test point 110 and the knocking point 120, and it can be understood that for the tension testing device 102, the process of testing the tension will cause the screen printing screen 101 to deform. For the solution of providing a plurality of through holes on the surface of the carrier 100, the screen printing screen 101 can be directly laid on the surface of the carrier 100, and the deformed part is carried out through the through holes, and the rest is also supported by the carrier 100, and the support area is increased, thereby reducing the probability of damage to the screen printing screen 101.

[0042] In some embodiments, the support platform 100 has a receiving space in addition to the supporting surface, and the light source 103 can be disposed in the receiving space.

[0043] The tension test system further includes a power switch 104, which is fixed to the outer side of the carrier 100 and electrically connected to the light source 103, and is used to control the on and off of the light source 103. By arranging the power switch 104 on the outer side of the carrier 100, it is convenient to control the start and shut down of the tension test system.

[0044] The wiring of the light source 103 and the power switch 104 can be installed in the accommodation space of the supporting platform 100, so that the aesthetics and safety of the entire tension testing system can be taken into consideration.

[0045] The support platform 100 is also provided with an openable door 105, and a handle 115 is provided on the openable door 105. The light source 103 and the light source 103 can be installed and inspected through the openable door 105, and the handle 115 is used to control the opening and closing of the openable door 105, which can be easily operated.

[0046] refer to Figure 3 , Figure 3 A structural schematic diagram of a printing screen and corresponding positions of test points provided in one embodiment of the present disclosure.

[0047] In some embodiments, the number of test points 110 is N, N is an odd number greater than or equal to 3, the central axis of one test point 110 coincides with the central axis of the screen printing screen 101, and the central axes of the remaining test points 110 coincide with the central axes of each of the screen printing screen 101 after being divided into N-1 equal parts, or, N is an odd number greater than or equal to 2, and the central axis of the test point 110 coincides with the central axis of each of the screen printing screen 101 after being divided into N equal parts.

[0048] If the test point 110 is an odd number greater than or equal to 3, then for the test point 110, one of them is ensured to be located at the center of the screen printing screen 101, and the rest of the screen printing screen 101 is divided into equal parts, and the test point 110 is set on the central axis of each equal part. In this way, all the test points 110 can be set in the parts with uniform force as much as possible, so that the tension tested by each test point 110 can better reflect the tension of the area as much as possible; similarly, if the test point 110 is an even number greater than or equal to 2, the test point 110 is set on the central axis of each equal part, so that each test point 110 can be more representative, so that when the average value is finally obtained, the average value can better reflect the surface tension of the screen printing screen 101, thereby improving the accuracy of the test.

[0049] It should be noted that the equal division here can be equal division along the same direction or along different directions. For example, the equal division here can be dividing a square into four rectangles along the same direction or into four squares, triangles or quadrilaterals (non-squares) along different directions, etc. The equal division here refers to dividing the area into equal parts.

[0050] In some embodiments, the number of the test points 110 is M, M=2 m +1, the central axis of one of the test points 110 coincides with the central axis of the screen printing screen 101, and the central axes of the remaining test points 110 coincide with the central axes of each of the screen printing screen 101 divided into M-1 equal parts along two mutually perpendicular directions, or, M = 2 m The central axis of the test point 110 coincides with the central axis of each of the M equal parts of the screen printing screen 101 along two directions perpendicular to each other, where m is an integer greater than 1.

[0051] When the number of test points 110 is 2 m +1 or 2 m At this time, it is convenient to divide the screen printing screen 101 into equal parts and to determine the position of each test point 110. On the one hand, it is convenient to divide the screen printing screen 101 into equal parts and, on the other hand, it can also simplify the calculation of the position of the test point 110 on the surface of the carrier 100.

[0052] For example, when the number of the test points 110 is 5, the central axis of one of the test points 110 coincides with the central axis of the screen printing screen 101, and the remaining test points 110 can directly divide the screen printing screen 101 along a cross, and directly correspond the remaining test points 110 to the central axes of the divided areas of the screen printing screen 101. For example, the screen printing screen 101 is a square as a whole, and the middle axis of one of the test points 110 is located at the center of the square, and the remaining test points 110 are located at the centers of the square areas after the screen printing is divided into four equal parts. Regardless of whether it is a square screen printing screen 101 or a rectangular screen printing screen 101, by dividing the regular pattern into 2 m Dividing the area into equal parts is the most convenient and easiest way to determine the position of the central axis.

[0053] In some embodiments, the number of test points 110 is 2 m +1 or 2 m The position of the test point 110 may not completely correspond to the central axis of the divided area. The screen printing screen 101 may be first moved according to 2 m+1 The screen printing screen 101 is divided equally, that is, the number of divisions along different directions is the same during the division process. This method can be used to divide the screen printing screen 101 in the simplest and most effective way. After that, the test point 110 is selected by using the divided area. For example, the intersection of the dividing lines can be used as the position of the central axis of the test point 110. Taking the number of the test points 110 as 8 (i.e. m=3), the screen printing screen 101 can be divided into 16 areas first, and the screen printing screen 101 can be divided into Dividing into 16 areas requires dividing three times in each direction to obtain 9 intersections. Excluding the central intersection, the remaining intersections can be used as the positions of the central axes of the 8 test points 110. Taking the number of test points 110 as 32 as an example (i.e. m=5), the screen printing screen 101 can be divided into 64 areas. Dividing the screen printing screen 101 into 64 areas requires dividing seven times in each direction to obtain 49 intersections, and then arbitrarily select 32 intersections from these 49 intersections.

[0054] In some embodiments, the number of the test points 110 is an odd number, the number of the knocking points 120 is two, the two knocking points 120 are located on both sides of the test point 110 whose central axis coincides with the central axis of the screen printing screen 101, and the distances between the two knocking points 120 and the test point 110 are equal. It can be understood that, for the odd number of the test points 110, there is a test point 110 whose central axis coincides with the central axis of the screen printing screen 101, and the test point 110 can be regarded as being in the center of the entire screen printing screen 101, and the test points 110 are set on both sides of the center of the screen printing screen 101, so that the forces at the same distance from the center of the screen printing screen 101 can be as similar as possible, so that the knocking points 120 can make the entire screen printing screen 101 more evenly laid, thereby further improving the accuracy of the test of the tension testing device 102.

[0055] In some embodiments, the tension test system may further include: a horizontal test device 106, which is fixed on the carrier 100 and is used to test whether the surface of the screen printing screen 101 is horizontal. The horizontal test device 106 can keep the surface of the screen printing screen 101 as horizontal as possible, thereby avoiding abnormal tension test caused by the tilt of the screen printing screen 101 during subsequent tests, thereby improving the accuracy of tension testing by the tension test device 102.

[0056] In some embodiments, the level testing device 106 can be a level meter. By observing the position of the bubble in the level meter, if the position of the bubble deviates from the center line, it means that the surface of the screen printing screen 101 is not horizontal. If the position of the bubble is located at the center line, it means that the surface of the screen printing screen 101 is horizontal.

[0057] In some embodiments, it further includes: a level adjustment device 107, which is fixed to the bottom surface of the carrier 100 and is used to adjust the height of each part of the carrier 100 according to the test result of the level test device 106. The carrier 100 is adjusted by the level adjustment device 107, and then the level of the surface of the carrier 100 is adjusted, and then the surface level of the screen printing screen 101 is controlled, so as to improve the accuracy of the tension test device 102 in testing the tension.

[0058] The level adjustment device 107 may be a base at the four corners of the carrier platform 100 , and the height of each base may be adjusted by rotation to thereby adjust the height of each part of the carrier platform 100 , so as to achieve the purpose of adjusting the levelness of the surface of the carrier platform 100 .

[0059] The disclosed embodiment provides a tension testing system. Before the test, a force is applied to the striking point 120 so that the surface of the screen printing screen 101 laid flat on the supporting platform 100 is made smoother, thereby improving the accuracy of subsequent tests. Thereafter, the surface tension of the screen printing screen 101 is tested by the tension testing device 102, and the tension data of the current test point 110 is displayed on the display screen 122. By repeating the above process at each test point 110 and obtaining the average value of the tension of multiple test points 110 through processing, the accuracy of the test can be further improved, thereby avoiding deviations at any test point 110 that may lead to misjudgment of the surface tension of the test screen printing screen 101.

[0060] Another embodiment of the present disclosure further provides a tension testing method, which can be tested using the above-mentioned tension testing system. The tension testing method provided by another embodiment of the present disclosure will be described below in conjunction with the accompanying drawings. It should be noted that the same or corresponding parts of the aforementioned embodiments can refer to the corresponding description of the aforementioned embodiments and will not be repeated below.

[0061] refer to Figure 4 , Figure 4 A flow chart of a tension testing method provided in one embodiment of the present disclosure.

[0062] In some embodiments, the tension testing method includes: S10. providing a support platform, on which a plurality of testing points and knocking points are arranged.

[0063] The tension testing method may further include: S11. placing a screen printing screen, wherein the screen printing screen covers the surface of the carrier platform.

[0064] In some embodiments, after the screen printing screen is placed, the tapping points are tapped so that the screen printing screen is laid more evenly on the support table, thereby improving the accuracy of subsequent testing of the surface tension of the screen printing screen.

[0065] In some embodiments, before testing each test point, the method further includes: testing whether the surface of the carrier is horizontal, and if the surface of the carrier is tilted, adjusting the angle of the carrier to make the surface of the carrier horizontal. Similarly, by adjusting the surface of the carrier to a horizontal state before testing, the accuracy of subsequent testing of the surface tension of the screen printing screen can be improved.

[0066] The tension testing method may also include: S12. Testing each test point in turn, the steps of testing the test points include: placing a tension testing device, the tension testing device is located on the surface of the screen printing screen, facing the test point; knocking the knocking point at least once, and testing the surface tension of the screen printing screen through the tension testing device after the knocking point recovers.

[0067] In some embodiments, before calculating the average value, it also includes: whether there is an abnormal value on the surface tension of the screen printing screen at the position corresponding to each test point, and if there is an abnormal value, each test point is re-tested. Whether the test is valid is determined by first determining whether there is an abnormal value at each test point. If there is an abnormal value, it indicates that there is a detection error during the test, or the screen printing screen is abnormal, or the screen printing screen is not laid evenly during the laying process, and each test point needs to be re-tested, or the screen printing screen needs to be replaced.

[0068] In some embodiments, the method for determining whether there are abnormal values ​​can be: classifying the data, converting the data into points according to the distance between the test points and the central axis of the screen printing screen, and dividing the test points with the same distance into the same category. When the data difference between the test points of the same category exceeds 30%, it indicates that the data is abnormal.

[0069] The tension testing method may further include: S13. Obtaining the surface tension of the screen printing plate at a position corresponding to each test point and calculating an average value, wherein the average value is used to characterize the surface tension of the screen printing plate.

[0070] By using the average value to characterize the surface tension of the screen printing screen, the accuracy of the test can be further improved, and the misjudgment of the surface tension of the screen printing screen can be avoided.

[0071] Those skilled in the art can understand that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the embodiments of the present disclosure. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of the present disclosure, so the protection scope of the embodiments of the present disclosure shall be based on the scope defined in the claims.

Claims

1. A tension test system, used in the photovoltaic field, characterized in that: include: A carrying platform, the carrying platform is used to carry the screen printing screen, and the carrying platform is provided with a plurality of testing points and knocking points; A tension testing device, the tension testing device comprising: a test base, the test base comprising a gravity sensor, the test base being located on the surface of the screen printing screen and facing the test point, the gravity sensor being used to test the tension of the screen printing screen surface at each position corresponding to the test point after the force of the knocking point is restored; a display screen, the display screen displaying the tension of the screen printing screen surface acquired by the gravity sensor; A processor is electrically connected to the tension testing device and is used to obtain the surface tension of the screen printing screen at a position corresponding to each of the test points and calculate an average value, wherein the average value is used to characterize the surface tension of the screen printing screen.

2. The tension testing system according to claim 1, characterized in that: The number of the test points is N, N is an odd number greater than or equal to 3, the central axis of one of the test points coincides with the central axis of the screen printing screen, and the central axes of the remaining test points coincide with the central axes of each of the screen printing screen divided into N-1 equal parts, or, N is an odd number greater than or equal to 2, and the central axes of the test points coincide with the central axes of each of the screen printing screen divided into N equal parts.

3. The tension testing system according to claim 1, characterized in that: The number of the test points is M, M=2 m +1, the central axis of one of the test points coincides with the central axis of the screen printing screen, and the central axes of the remaining test points coincide with the central axes of each of the screen printing screen divided into M-1 equal parts in two mutually perpendicular directions, or, M=2 m The central axis of the test point coincides with the central axis of each of the M equal parts of the screen printing screen along two directions perpendicular to each other, where m is an integer greater than 1.

4. The tension testing system according to claim 2 or 3, characterized in that: The number of the test points is an odd number, the number of the knocking points is two, the two knocking points are located on both sides of the test point whose central axis coincides with the central axis of the screen printing screen, and the distances between the two knocking points and the test point are equal.

5. The tension testing system according to claim 1, characterized in that: The test point is a projection pattern, the surface of the carrier platform also has a target pattern, the target pattern corresponds to the projection pattern, and the tension testing system further includes: A light source is located on a side of the target pattern away from the screen printing screen, and is used to provide light to the target pattern so as to project the target pattern onto the surface of the screen printing screen to form the projection pattern.

6. The tension testing system according to claim 1, characterized in that: Also includes: A level testing device is fixed on the supporting platform and is used to test whether the surface of the screen printing screen is level.

7. The tension testing system according to claim 6, characterized in that: Also includes: A level adjustment device is fixed to the bottom surface of the support platform and is used to adjust the height of each part of the support platform according to the test result of the level test device.

8. A tension test method, characterized in that: include Providing a carrying platform, wherein a plurality of testing points and knocking points are arranged on the carrying platform; Placing a screen printing screen, wherein the screen printing screen covers the surface of the carrier platform; Each of the test points is tested in turn, and the step of testing the test points includes: placing a tension test device, the tension test device is located on the surface of the screen printing screen, facing the test point; Tapping the tapping point at least once, and testing the surface tension of the screen printing screen by the tension testing device after the tapping point is restored; The surface tension of the screen printing screen at a position corresponding to each of the test points is obtained and an average value is calculated, and the average value is used to characterize the surface tension of the screen printing screen.

9. The tension testing method according to claim 8, characterized in that: Before testing each of the test points, the method further includes: testing whether the surface of the carrier platform is horizontal; if the surface of the carrier platform is tilted, adjusting the angle of the carrier platform to make the surface of the carrier platform horizontal.

10. The tension testing method according to claim 8, characterized in that: Before calculating the average value, the method further includes: determining whether there is an abnormal value on the surface tension of the screen printing screen at the position corresponding to each test point; if there is an abnormal value, retesting each test point.

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