Light shielding device and power measurement system

Abstract

The application relates to a light shielding device and a power measurement system. The light shielding device comprises: a plurality of light shielding mechanisms, the projections of the plurality of light shielding mechanisms along a first direction are connected in sequence, the projection of the light shielding mechanism along the first direction is located on a to-be-tested mechanism, and the light shielding mechanism is used for shielding the to-be-tested mechanism; and a detection hole, the plurality of light shielding mechanisms surround and construct the detection hole, and the detection hole is used for exposing an active area of the to-be-tested mechanism along the first direction; wherein the positions between two adjacent light shielding mechanisms are adjustable, so as to change the size of the detection hole. Through the technical scheme provided in the application, the problems of complicated operation and low applicability of the light shielding device in the related art can be solved.

Description

Technical Field

[0001] This application relates to the field of power measurement system technology, and in particular to a shading device and a power measurement system. Background Technology

[0002] During the power measurement of solar cells and modules, it is necessary to accurately limit the effective light-receiving area of ​​the solar cells or modules using a light-shielding device to eliminate interference from reflected light from inactive areas.

[0003] In related technologies, light-shielding devices include black adhesive tape or photomask assemblies. Typically, black adhesive tape is directly applied to inactive areas, or a photomask assembly is fixed to the inactive area. However, when measuring different test subjects, it is necessary to re-apply and remove the tape, or to fabricate different types of photomask assemblies. Both of these light-shielding devices suffer from cumbersome operation, low applicability, and increased testing time and processing costs, thus reducing testing efficiency. Utility Model Content

[0004] Therefore, it is necessary to provide a shading device and a power measurement system to address the problems of cumbersome operation and low applicability of shading devices.

[0005] A light-shielding device includes: a plurality of light-shielding mechanisms, the projections of the plurality of light-shielding mechanisms along a first direction being connected sequentially, the projections of the light-shielding mechanisms along the first direction being located on the test object, and the light-shielding mechanisms being used to shield the test object; and a detection hole, the plurality of light-shielding mechanisms enclosing and forming a detection hole, the detection hole being used to expose the active area of ​​the test object along the first direction; wherein the position between two adjacent light-shielding mechanisms is adjustable to change the size of the detection hole.

[0006] In one embodiment, the light-shielding device includes four light-shielding mechanisms whose projections along a first direction overlap sequentially. The four light-shielding mechanisms enclose and construct a detection hole, wherein two light-shielding mechanisms are arranged opposite each other, and the other two light-shielding mechanisms are arranged opposite each other. The two light-shielding mechanisms arranged opposite each other can move towards or away from each other.

[0007] In one embodiment, the light-shielding mechanism is movably disposed on the test mechanism, and the light-shielding device further includes: a plurality of pressing mechanisms disposed on the light-shielding mechanism to fix the light-shielding mechanism.

[0008] In one embodiment, the light-shielding mechanism is configured as a rectangular plate, with a length of not less than 250 mm, a width between 3 mm and 4 mm, and a thickness between 3 mm and 5 mm.

[0009] In one embodiment, the light-shielding mechanism includes: a connecting unit, the projection of which along a first direction is located on the mechanism to be tested; and an adjusting unit, the projection of which along the first direction is located on the mechanism to be tested. The adjusting unit is connected to the connecting unit or the projection of which along the first direction of an adjacent light-shielding mechanism. An adjusting structure is provided between the adjusting unit and the connecting unit. The adjusting structure changes the position of the adjusting unit relative to the connecting unit to change the position between two adjacent light-shielding mechanisms, thereby changing the size of the detection hole.

[0010] In one embodiment, the adjustment structure includes: a sliding groove disposed on the connecting unit; and a locking member disposed at one end of the adjustment unit, the locking member being slidably inserted into the sliding groove, the locking member being used to fix the relative position of the connecting unit and the adjustment unit, and the locking member being used to fix the connecting unit and the adjustment unit on the testing mechanism.

[0011] In one embodiment, the connecting unit includes a first light-shielding part and a first fixing part. The first light-shielding part is used to abut against the top surface of the mechanism under test, and the first fixing part is used to abut against the side wall of the mechanism under test. A sliding groove is provided on the first fixing part. The adjusting unit includes a second light-shielding part and a second fixing part. The second light-shielding part is used to abut against the top surface of the mechanism under test, and the second fixing part is used to abut against the side wall of the mechanism under test. A locking member is provided on the second fixing part.

[0012] In one embodiment, the first light-shielding part is configured as a rectangular plate, and the thickness of the first light-shielding part is set between 5mm and 20mm; and / or, the first fixing part is configured as a rectangular plate, and the thickness of the first fixing part is set between 5mm and 20mm.

[0013] In one embodiment, the reflectivity of the light-shielding mechanism is less than 7%.

[0014] A power measurement system includes a support mechanism and the aforementioned light-shielding device, wherein the support mechanism is used to support the light-shielding device.

[0015] In the aforementioned light-shielding device, multiple light-shielding mechanisms project sequentially along a first direction, overlapping and enclosing to form a detection hole to expose the active area of ​​the device under test. By adjusting the relative positions between two adjacent light-shielding mechanisms, the size of the detection hole can be flexibly changed to adapt to the measurement needs of devices of different specifications. With this configuration, by adjusting the relative positions between two adjacent light-shielding mechanisms, the light-shielding device can cover devices of various specifications, thus quickly matching devices of different sizes, improving the applicability of the light-shielding device, reducing the need to manufacture light-shielding devices of different specifications, or even eliminating the need to manufacture light-shielding devices of different specifications, improving testing efficiency, meeting diverse testing needs, simplifying the light-shielding process, reducing the difficulty of light-shielding, and reducing testing time and processing costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a light-shielding device according to one embodiment;

[0017] Figure 2 for Figure 1 A schematic diagram of another state of the device shown;

[0018] Figure 3 This is a schematic diagram of the power measurement system according to another embodiment;

[0019] Figure 4 This is a schematic diagram of the structure of a light-shielding device according to another embodiment;

[0020] Figure 5 This is a schematic diagram of the power measurement system according to another embodiment.

[0021] Explanation of reference numerals in the attached figures:

[0022] 10. Light-blocking mechanism;

[0023] 11. Connecting unit; 111. Sliding groove; 112. First light-shielding part; 113. First fixing part;

[0024] 12. Adjustment unit; 121. Locking element; 122. Second light-shielding part; 123. Second fixing part;

[0025] 20. Inspection hole;

[0026] 30. Holding mechanism;

[0027] 100. Bearing mechanism;

[0028] 1. Battery cell; 2. Battery module; 201. Frame. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] See Figure 1 and Figure 2 One embodiment of this application provides a light-shielding device, which includes a plurality of light-shielding mechanisms 10 and a detection hole 20. The projections of the plurality of light-shielding mechanisms 10 along a first direction are sequentially connected, and the projections of the light-shielding mechanisms 10 along the first direction are located on the test object, serving to shield the test object. The plurality of light-shielding mechanisms 10 enclose and construct the detection hole 20, which exposes the active area of ​​the test object along the first direction. The positions of adjacent light-shielding mechanisms 10 are adjustable to change the size of the detection hole 20. The first direction is the light illumination direction.

[0036] Applying the technical solution of this application, multiple light-shielding mechanisms 10 are sequentially overlapped and enclosed along the projection of a first direction to form a detection hole 20, thereby exposing the active area of ​​the device under test. By adjusting the relative position between two adjacent light-shielding mechanisms 10, the size of the detection hole 20 can be flexibly changed to adapt to the measurement needs of devices under test of different specifications. With this configuration, by adjusting the relative position between two adjacent light-shielding mechanisms 10, the light-shielding device can cover devices under test of various specifications. This allows for rapid matching of devices under test of different sizes, improves the applicability of the light-shielding device, reduces the need to process light-shielding devices of different specifications, and may even eliminate the need to process light-shielding devices of different specifications, thereby improving testing efficiency, meeting diverse testing needs, simplifying the light-shielding steps, reducing the difficulty of light-shielding, and reducing testing time and processing costs.

[0037] In some embodiments, the material of the light-shielding mechanism 10 is insulated from the mechanism under test.

[0038] In some embodiments, the detection hole 20 can be rectangular or circular, and the operator can set it according to the requirements, as long as it matches the outline of the active area of ​​the mechanism to be tested.

[0039] See Figure 1 and Figure 2The light-shielding device includes four light-shielding mechanisms 10. The projections of the four light-shielding mechanisms 10 along a first direction overlap sequentially, and the four light-shielding mechanisms 10 enclose and construct a detection hole 20. Two light-shielding mechanisms 10 are arranged opposite each other, and the other two light-shielding mechanisms 10 are also arranged opposite each other. The two oppositely arranged light-shielding mechanisms 10 can move closer to or further away from each other. This arrangement allows the four light-shielding mechanisms 10 to enclose and form the detection hole 20, and makes the shape of the detection hole 20 conform to most commercially available testing mechanisms, reducing the manufacturing difficulty of the light-shielding device. Furthermore, changing the size of the detection hole 20 is convenient; only the light-shielding mechanism 10 needs to be moved.

[0040] See Figure 1 The light-shielding mechanism 10 is movably mounted on the test device. The light-shielding device also includes multiple holding mechanisms 30, which are mounted on the light-shielding mechanism 10 to fix the light-shielding mechanism 10. This arrangement facilitates the fixation of the light-shielding mechanism 10, prevents displacement after the light-shielding mechanism 10 moves into place, thereby ensuring the light-shielding effect of the light-shielding mechanism 10 and improving the accuracy of subsequent power measurements.

[0041] In some embodiments, the holding mechanism 30 simply uses gravity to fix the light-shielding mechanism 10 to the test mechanism.

[0042] In some embodiments, the holding mechanism 30 is a magnetic element, and the holding mechanism 30 is magnetically fixed to the mechanism to be tested, which can further reduce the possibility of displacement of the light-shielding mechanism 10.

[0043] In some embodiments, the holding mechanism 30 is made of a matte black material.

[0044] The light-shielding mechanism 10 is a rectangular plate with a length L of not less than 250mm, a width W between 3mm and 4mm, and a thickness H1 between 3mm and 5mm. This design simplifies the structure of the light-shielding mechanism 10, making it easier for workers to manufacture, and ensures that its dimensions conform to most testing mechanisms on the market. Furthermore, setting the thickness of the light-shielding mechanism 10 between 3mm and 5mm reduces both the manufacturing difficulty and the weight and cost.

[0045] See Figure 4 and Figure 5Another embodiment of this application provides a light-shielding mechanism 10, which includes a connecting unit 11 and an adjusting unit 12. The projection of the connecting unit 11 along a first direction is located on the mechanism to be tested. The projection of the adjusting unit 12 along the first direction is located on the mechanism to be tested. The adjusting unit 12 is connected to the connecting unit 11 or the projection of the adjusting unit 12 along the first direction of an adjacent light-shielding mechanism 10. An adjusting structure is provided between the adjusting unit 12 and the connecting unit 11. The adjusting structure changes the position of the adjusting unit 12 relative to the connecting unit 11, thereby changing the position between two adjacent light-shielding mechanisms 10, and thus changing the size of the detection hole 20. With this configuration, through the cooperative action of the adjusting unit 12 and the connecting unit 11, the relative position between adjacent light-shielding mechanisms 10 can be precisely controlled, thereby adjusting the size of the detection hole 20 in real time, thereby improving the applicability of the light-shielding mechanism 10.

[0046] Specifically, the adjustment structure includes a sliding groove 111 and a locking member 121. The sliding groove 111 is disposed on the connecting unit 11. The locking member 121 is disposed at one end of the adjusting unit 12, and is slidably inserted into the sliding groove 111. The locking member 121 is used to fix the relative position of the connecting unit 11 and the adjusting unit 12, and to fix the connecting unit 11 and the adjusting unit 12 to the testing mechanism. With this configuration, the sliding groove 111 allows the locking member 121 to move freely within a continuous range, achieving stepless adjustment between the connecting unit 11 and the adjusting unit 12, avoiding the limitations of traditional fixed hole position adjustment. Operators can quickly fine-tune the size of the detection hole 20 according to needs, without relying on preset positions. Furthermore, the locking member 121 can be used to fix the connecting unit 11 and the adjusting unit 12, as well as the light-shielding mechanism 10 and the testing mechanism, simplifying the structure of the light-shielding mechanism 10 and facilitating its processing.

[0047] In some embodiments, the locking member 121 is a screw or a pin. The locking member 121 securely locks the adjusting unit 12 and the connecting unit 11 by friction fastening, and fixes the light-shielding mechanism 10 on the test mechanism to avoid accidental displacement caused by vibration or external force collision, and ensures the long-term stability of the light-shielding mechanism 10.

[0048] Specifically, the connecting unit 11 includes a first light-shielding part 112 and a first fixing part 113. The first light-shielding part 112 is used to abut against the top surface of the mechanism under test, and the first fixing part 113 is used to abut against the side wall of the mechanism under test. A sliding groove 111 is provided on the first fixing part 113. The adjusting unit 12 includes a second light-shielding part 122 and a second fixing part 123. The second light-shielding part 122 is used to abut against the top surface of the mechanism under test, and the second fixing part 123 is used to abut against the side wall of the mechanism under test. A locking member 121 is provided on the second fixing part 123. This arrangement ensures the light-shielding effect of the connecting unit 11 and the adjusting unit 12, while facilitating the fixing of the connecting unit 11 and the adjusting unit 12, and preventing the adjusting structure from affecting the light-shielding effect of the light-shielding mechanism 10.

[0049] In some embodiments, the outer wall of the adjusting unit 12 abuts against the inner wall of the connecting unit 11, so that when the adjusting unit 12 is slid, the inner wall of the connecting unit 11 can guide the adjusting unit 12 and ensure the stability of the movement of the adjusting unit 12.

[0050] In some embodiments, the mechanism under test is a rectangular structure, and the connecting unit 11 includes a first connecting part and a second connecting part, which are arranged vertically between each other. Both the first connecting part and the second connecting part include a first light-shielding part 112 and a first fixing part 113. The connection point of the first connecting part and the second connecting part is fixed at the turning point of the mechanism under test. This arrangement can further improve the stability of the connecting unit 11 fixed on the mechanism under test.

[0051] In some embodiments, the sliding groove 111 may be provided only on the first connecting part or the second connecting part, or the sliding groove 111 may be provided on both the first connecting part and the second connecting part.

[0052] In some embodiments, the adjustment unit 12 abuts against the adjustment unit 12 of the adjacent light-shielding mechanism 10.

[0053] In some embodiments, one end of the adjustment unit 12 is disposed inside the connecting unit 11 of the adjacent light-shielding mechanism 10.

[0054] In some embodiments, the length of the adjustment unit 12 can be 0.2m, 0.5m, or 1m, and staff can choose according to their needs.

[0055] In this design, the first light-shielding part 112 is a rectangular plate with a thickness between 5mm and 20mm. Alternatively, the first fixing part 113 is a rectangular plate with a thickness between 5mm and 20mm. In this application, the first light-shielding part 112, the first fixing part 113, the second light-shielding part 122, and the second fixing part 123 are all rectangular plates. The thickness H2 of the first light-shielding part 112, the first fixing part 113, the second light-shielding part 122, and the second fixing part 123 is all between 5mm and 20mm. This design simplifies the structure of the light-shielding mechanism 10, making it easier for workers to process. Furthermore, the thickness of the first light-shielding part 112, the first fixing part 113, the second light-shielding part 122, and the second fixing part 123, all between 5mm and 20mm, reduces the processing difficulty, weight, and cost of the light-shielding mechanism 10.

[0056] The reflectivity of the light-shielding mechanism 10 is less than 7%. This design significantly reduces stray light interference, prevents reflected light from causing secondary interference within the system, and improves the accuracy of measurement data.

[0057] Furthermore, in the above embodiments, since adjacent light-shielding mechanisms 10 are abutted or detachably connected, it is convenient to store the light-shielding device.

[0058] Another embodiment of this application provides a power measurement system, which includes a support mechanism 100 and the aforementioned light-shielding device. The support mechanism 100 supports the light-shielding device. Using the aforementioned light-shielding device can improve the testing efficiency of the power measurement system, meet diverse testing needs, simplify testing procedures, and reduce testing time and processing costs.

[0059] See Figure 3 Another embodiment of this application provides a power measurement system. The shading device of the power measurement system includes a plurality of shading mechanisms 10, which are configured as rectangular plates. The power measurement system is used to measure the power of the battery cell 1. The X direction is the first direction.

[0060] The carrier mechanism 100 includes a carrier surface with a carrier portion and a light-shielding portion. The light-shielding portion surrounds the outer periphery of the carrier portion and is used to place the battery cell 1. Multiple light-shielding mechanisms 10 are placed in the light-shielding portion, and the distance 'a' between the light-shielding mechanism 10 and the battery cell 1 is set between 0.1 mm and 0.3 mm. This arrangement avoids collisions between the light-shielding mechanism 10 and the battery cell 1, thus preventing damage to the battery cell 1, and ensures effective light shielding of the light-shielding portion, preventing reflected light from the carrier surface from affecting the measurement results.

[0061] In some embodiments, the power measurement system further includes one or more film rulers with a measuring range of 0-25cm or 0-30cm, which can be used to adjust the position of the solar cell 1 to ensure sufficient light illumination on the solar cell 1. Simultaneously, the position of the light-shielding mechanism 10 can be adjusted using the film rulers.

[0062] Specifically, the power measurement system described above can measure battery cells 1 with dimensions of 210mm×210mm, 210mm×182mm or 182mm×182mm, as well as half cells or three-quarters cells.

[0063] In some embodiments, when measuring the power of the battery cell 1, multiple light-shielding mechanisms 10 may be provided on one side of the battery cell 1 to cover the light-shielding portion.

[0064] In some embodiments, the height of the battery cell 1 is H2, and 0.9≤H2 / H1≤1.1. This setting ensures the light-blocking effect on the light-shielding part while preventing light reflection onto the battery cell 1, thus ensuring the accuracy of the power measurement of the battery cell 1.

[0065] See Figure 5 Another embodiment of this application provides a power measurement system. The power measurement system includes a shading device comprising a plurality of shading mechanisms 10, each shading mechanism 10 including a connecting unit 11 and an adjusting unit 12. The power measurement system is used to measure the power of the battery assembly 2.

[0066] Specifically, the battery assembly 2 includes a frame 201, a light-shielding mechanism 10 fixed on the frame 201, a first light-shielding part 112 and a second light-shielding part 122 located above the frame 201, and a first fixing part 113 and a second fixing part 123 located on one side of the frame 201.

[0067] In this embodiment, since the support mechanism 100 cannot be observed along the direction of illumination, there is no need to shield the support mechanism 100 from the light.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A light-shielding device, characterized in that, The light-shielding device includes: Multiple light-shielding mechanisms (10) are connected sequentially along the projection of the multiple light-shielding mechanisms (10) along the first direction. The projection of the light-shielding mechanism (10) along the first direction is located on the test mechanism. The light-shielding mechanism (10) is used to shield the test mechanism. The detection hole (20) is constructed by a plurality of the light-shielding mechanisms (10), and the detection hole (20) is used to expose the active area of ​​the mechanism to be tested along the first direction; The positions of two adjacent light-shielding mechanisms (10) are adjustable to change the size of the detection hole (20).

2. The light-shielding device according to claim 1, characterized in that, The light-shielding device includes four light-shielding mechanisms (10), which are projected sequentially along the first direction and overlap. The four light-shielding mechanisms (10) enclose and construct the detection hole (20). Two of the light-shielding mechanisms (10) are arranged opposite each other, and the other two light-shielding mechanisms (10) are arranged opposite each other. The two light-shielding mechanisms (10) arranged opposite each other can move towards or away from each other.

3. The light-shielding device according to claim 2, characterized in that, The light-shielding mechanism (10) is movably disposed on the test mechanism, and the light-shielding device further includes: Multiple holding mechanisms (30) are provided on the light-shielding mechanism (10) to fix the light-shielding mechanism (10).

4. The light-shielding device according to claim 2, characterized in that, The light-shielding mechanism (10) is configured as a rectangular plate, the length of the light-shielding mechanism (10) is not less than 250mm, the width of the light-shielding mechanism (10) is set between 3mm and 4mm, and the thickness of the light-shielding mechanism (10) is set between 3mm and 5mm.

5. The light-shielding device according to claim 1, characterized in that, The light-shielding mechanism (10) includes: A connecting unit (11) is projected along the first direction onto the mechanism under test; An adjustment unit (12) is located on the test mechanism along the first direction. The adjustment unit (12) is connected to the connecting unit (11) of the adjacent light-shielding mechanism (10) or the projection of the adjustment unit (12) along the first direction. An adjustment structure is provided between the adjustment unit (12) and the connecting unit (11). The adjustment structure changes the position of the adjustment unit (12) relative to the connecting unit (11) to change the position between the two adjacent light-shielding mechanisms (10) to change the size of the detection hole (20).

6. The light-shielding device according to claim 5, characterized in that, The adjustment structure includes: A sliding groove (111) is provided on the connecting unit (11); A locking member (121) is disposed at one end of the adjusting unit (12). The locking member (121) is slidably inserted into the sliding groove (111). The locking member (121) is used to fix the relative position of the connecting unit (11) and the adjusting unit (12). The locking member (121) is used to fix the connecting unit (11) and the adjusting unit (12) on the mechanism to be tested.

7. The light-shielding device according to claim 6, characterized in that, The connecting unit (11) includes a first light-shielding part (112) and a first fixing part (113). The first light-shielding part (112) is used to abut against the top surface of the mechanism to be tested, and the first fixing part (113) is used to abut against the side wall of the mechanism to be tested. The first fixing part (113) is provided with the sliding groove (111). The adjustment unit (12) includes a second light-shielding part (122) and a second fixing part (123). The second light-shielding part (122) is used to abut against the top surface of the mechanism to be tested, and the second fixing part (123) is used to abut against the side wall of the mechanism to be tested. The locking member (121) is provided on the second fixing part (123).

8. The light-shielding device according to claim 7, characterized in that, The first light-shielding part (112) is configured as a rectangular plate, and the thickness of the first light-shielding part (112) is set between 5mm and 20mm, and / or the first fixing part (113) is configured as a rectangular plate, and the thickness of the first fixing part (113) is set between 5mm and 20mm.

9. The light-shielding device according to any one of claims 1-8, characterized in that, The reflectivity of the light-shielding mechanism (10) is less than 7%.

10. A power measurement system, characterized in that, The power measurement system includes a support mechanism (100) and a light-shielding device according to any one of claims 1 to 9, wherein the support mechanism (100) is used to support the light-shielding device.

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