Image measuring instrument for detecting size of aluminum profile

By designing an image measuring instrument for aluminum profile dimension inspection, the rotation of the rotating arm and the cooperation of the baffle ensure that the lens group coincides with the center line of the aluminum profile, solving the problem of inaccurate inspection data in the existing technology and realizing more accurate aluminum profile cross-section inspection.

CN223769470UActive Publication Date: 2026-01-06CHONGQING SHEMAO ELECTRONIC TECH CO LTD
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Patent Information

Application Number
CN202520095360.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-15
Publication Date
2026-01-06
Estimated Expiration
2035-01-15

AI Technical Summary

Technical Problem

In existing technologies, when inspecting the cross-section of aluminum profiles, the images acquired by the lens assembly are limited to the upper end of the aluminum profile, resulting in inaccurate inspection data that cannot represent all cross-sections along the entire length of the aluminum profile.

Method used

An image measuring instrument for aluminum profile dimension inspection was designed. The rotating arm is driven to rotate by the first drive mechanism, so that the lens group, aluminum profile and second lamp group are at the same level, and the aluminum profile is pushed to abut against the strip baffle, so that the center line of the lens group and the aluminum profile are coincided, ensuring the accuracy of the inspection data.

Benefits of technology

The lens assembly can accurately capture the shape of the cross-section of the aluminum profile, resulting in more accurate detection data and solving the problem of inaccurate detection data in existing technologies.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an image measuring instrument for detecting the size of an aluminum profile. The image measuring instrument comprises a rack, a workbench, a glass plate, a strip-shaped baffle, a rotating arm, a lens group, a first lamp group, a second lamp group and a first driving mechanism. The workbench is arranged on the rack, and the glass plate is arranged on the workbench and used for bearing an aluminum profile; the strip-shaped baffle is connected with the workbench and located above the glass plate, and the side face of the strip-shaped baffle can block the side face of the aluminum profile. The lens group is arranged at the upper end of the rotating arm; the second lamp group is arranged at the lower end of the rotating arm; the first driving mechanism drives the rotating arm to rotate, so that the lens set, the aluminum profile and the second lamp set are located on the same horizontal plane, the aluminum profile is pushed to abut against the strip-shaped baffle at the moment, the connecting line of the lens set and the second lamp set coincides with the center line of the aluminum profile, and the lens set obtains the shape of the cross section of the aluminum profile; and the detection data is more accurate.
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Description

Technical Field

[0001] This utility model relates to the field of measuring equipment technology, specifically to an image measuring instrument for detecting the dimensions of aluminum profiles. Background Technology

[0002] In the quality control and inspection process of aluminum profiles, dimensional inspection is essential. The main dimensions to be inspected for aluminum profiles are length, width, height, and various cross-sectional dimensions. Cross-sectional inspection can obtain information such as thickness and corner radius.

[0003] In existing technologies, when using an image projector to inspect the dimensions of aluminum profiles, the rectangular aluminum profile is placed horizontally on a transparent worktable for inspection. Lights are installed below the transparent worktable, and there are also lights on the side of the lens assembly above the worktable, ensuring a clear outline of the aluminum profile. The lens assembly then captures an image of the aluminum profile, and the software then obtains the length, width, and height dimensions. However, when inspecting the cross-sectional dimensions of the aluminum profile, the cross-section needs to be directly facing the lens assembly. Since the aluminum profile used for inspection is usually a section, its cross-section is not necessarily perpendicular to its centerline. Therefore, placing the aluminum profile vertically on the transparent worktable results in an tilt, causing the image captured by the lens assembly above to be limited to the upper end of the aluminum profile. The inspected data cannot represent all cross-sections along the entire length of the aluminum profile, meaning the inspection data is inaccurate. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides an image measuring instrument for aluminum profile size detection, which can solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] This utility model provides an image measuring instrument for inspecting the dimensions of aluminum profiles, comprising:

[0006] frame;

[0007] A workbench, which is mounted on the frame;

[0008] A glass plate is placed on the workbench and is used to support aluminum profiles;

[0009] A strip baffle, connected to the workbench, is located above the glass plate, and its side can block the side of the aluminum profile.

[0010] A rotating arm, the middle part of which is rotatably connected to the frame;

[0011] The lens assembly is located at the upper end of the rotating arm;

[0012] The first light assembly is located at the upper end of the rotating arm;

[0013] The second light assembly is located at the lower end of the rotating arm, opposite to the lens assembly; and

[0014] A first drive mechanism is used to drive the rotating arm to rotate;

[0015] The glass plate is located between the lens group and the second lamp group; the rotation center of the rotating arm is located above the glass plate.

[0016] Preferably, the frame includes upright support columns;

[0017] The workbench includes:

[0018] A connecting beam is attached to the supporting column.

[0019] A support base is connected to the end of the connecting beam furthest from the support column;

[0020] A glass mounting base is disposed on the support base; and

[0021] Second drive mechanism;

[0022] Both ends of the strip baffle are connected to the glass mounting base; a limiting window is formed between the strip baffle and the glass mounting base; the glass plate is slidably disposed on the glass mounting base along the length direction of the connecting beam; one end of the glass plate slides through the limiting window; the second driving mechanism is used to drive the glass plate to slide on the glass mounting base.

[0023] Preferably, the glass mounting base includes:

[0024] The two first mounting posts are set parallel to each other;

[0025] Two second mounting posts are arranged parallel to each other, with each end of the second mounting post connected to the ends of the two first mounting posts respectively. The two second mounting posts and the two first mounting posts form a square frame; and

[0026] Two side plates are respectively connected to the upper end of the corresponding second mounting column, and the two side plates are located on both sides of the glass plate;

[0027] The two ends of the strip baffle are respectively connected to the two side plates; the limiting window is formed between the strip baffle, the two side plates and the first mounting column; the glass plate is slidably mounted on the two second mounting columns.

[0028] Preferably, the support base has a mounting groove; the image measuring instrument for aluminum profile size inspection further includes:

[0029] A slider is slidably disposed in the mounting groove and connected to the lower end of the first mounting post; a first hole is provided on the slider.

[0030] A first drive rod, one end of which is threadedly connected to the first hole; and

[0031] A first motor is connected to the support base, and the output end of the first motor is connected to the first drive rod.

[0032] The axis of the first drive rod is perpendicular to the sliding direction of the glass plate.

[0033] Preferably, the glass plate has a strip-shaped hole at one end near the strip-shaped baffle; the length direction of the strip-shaped hole is parallel to the axis of the first drive rod.

[0034] The second drive mechanism includes:

[0035] A limiting seat is connected to the connecting beam and has a square hole thereon;

[0036] A square rod, one end of which is slidably disposed in the strip-shaped hole, and the other end passes through the square hole and has a coaxial second hole;

[0037] A second drive rod is rotatably mounted on the support column, and the second drive rod is threadedly connected to the second hole; and

[0038] The second motor is connected to the support column, and its output end is connected to the second drive rod.

[0039] Preferably, the second mounting post has multiple mating grooves; the multiple mating grooves are distributed along the length direction of the second mounting post; each of the mating grooves is provided with a rotatable roller; the roller abuts against the lower end of the glass plate.

[0040] Preferably, the first driving mechanism includes:

[0041] A rotating shaft is rotatably mounted on a support column, with one end connected to the middle of the rotating arm; and

[0042] A third motor is mounted on the support column, and its output end is connected to the end of the rotating shaft away from the rotating arm.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] In this invention, the rotating arm is driven to rotate by the first driving mechanism, so that the lens group, the aluminum profile, and the second lamp group are at the same level. At this time, the aluminum profile is pushed to abut against the strip baffle, so that the line connecting the lens group and the second lamp group coincides with the center line of the aluminum profile, thereby allowing the lens group to obtain the shape of the cross section of the aluminum profile, and the detection data is more accurate. Attached Figure Description

[0045] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0046] Figure 1 This is a perspective view of an image measuring instrument for aluminum profile dimension detection according to one embodiment of the present invention;

[0047] Figure 2 for Figure 1 Another 3D view (rackless);

[0048] Figure 3 for Figure 2 A three-dimensional view of the second drive mechanism in conjunction with the glass plate;

[0049] Figure 4 for Figure 3 Another 3D image;

[0050] Figure 5 for Figure 3 A three-dimensional view of the cooperation between the central support and the glass mounting base (without the glass plate);

[0051] Figure 6 for Figure 5 Another stereoscopic view (front view).

[0052] Figure label:

[0053] 10. Workbench; 11. Connecting beam; 12. Support base; 121. Mounting groove; 13. Glass mounting base; 131. First mounting post; 132. Second mounting post; 133. Side plate; 14. Second drive mechanism; 141. Limiting seat; 142. Square hole; 143. Square rod; 144. Second hole; 145. Second drive rod; 146. Second motor; 15. Limiting window; 16. Mating groove; 17. Roller;

[0054] 20. Glass plate; 21. Strip hole;

[0055] 30. Strip baffle; 31. Rotating arm; 32. Lens assembly; 33. Second light assembly;

[0056] 40. First drive mechanism; 41. Rotating shaft; 42. Third motor;

[0057] 50. Support column;

[0058] 60. Slider; 61. First hole; 62. First drive rod; 63. First motor;

[0059] 70. Aluminum profiles. Detailed Implementation

[0060] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0061] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0062] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0063] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0064] 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0065] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through 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. "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.

[0066] See Figures 1 to 6 This embodiment provides an image measuring instrument for aluminum profile size detection, including a frame, a worktable 10, a glass plate 20, a strip baffle 30, a rotating arm 31, a lens group 32, a first lamp group, a second lamp group 33, and a first drive mechanism 40.

[0067] A workbench 10 is mounted on a frame, and a glass plate 20 is mounted on the workbench 10. The glass plate 20 is used to support the aluminum profile 70. A strip baffle 30 is connected to the workbench 10 and is located above the glass plate 20. Its side can block the side of the aluminum profile 70. When the aluminum profile 70 is pushed against the strip baffle 30, the side of the cuboid-shaped strip baffle 30 can block the side of the normally cuboid-shaped aluminum profile 70, thereby making the aluminum profile 70 and the strip baffle 30 parallel to each other.

[0068] The middle part of the rotating arm 31 is rotatably connected to the frame, and the rotating arm 31 is C-shaped.

[0069] The lens assembly 32 is disposed at the upper end of the rotating arm 31, and can be referred to in the prior art. The lens assembly 32 can slide vertically at the upper end of the rotating arm 31, thereby allowing the lens assembly 32 to move closer to or further away from the glass plate 20 to achieve lens focusing. The first lamp assembly is disposed at the upper end of the rotating arm 31, and specifically, the first lamp assembly can be disposed on the outer periphery of the lens assembly 32, referring to the prior art.

[0070] The second lamp group 33 is located at the lower end of the rotating arm 31, opposite to the lens group 32. The function of the second lamp group 33 is the same as that of the lamp group below the transparent worktable 10 of the existing influence measuring instrument. The first drive mechanism 40 is used to drive the rotating arm 31 to rotate. The first lamp group and the second lamp group 33 irradiate the aluminum profile 70 on the transparent glass plate 20 from the upper and lower sides, respectively, so that the lens can obtain the cleaned outline of the aluminum profile 70.

[0071] The glass plate 20 is located between the lens group 32 and the second lamp group 33, and the rotation center of the rotating arm 31 is located on the upper side of the glass plate 20.

[0072] In this embodiment, the aluminum profile 70 is placed on the transparent glass plate 20. After the lens group 32 obtains the image of the aluminum profile 70 from above, the rotating arm 31 is driven to rotate by the first driving mechanism 40, so that the lens group 32, the aluminum profile 70 and the second lamp group 33 are at the same level. At this time, the aluminum profile 70 is pushed to abut against the strip baffle 30, so that the line connecting the lens group 32 and the second lamp group 33 coincides with the center line of the aluminum profile 70, so that the lens group 32 obtains the shape of the cross section of the aluminum profile 70, and the detection data is more accurate.

[0073] In one embodiment, the frame includes an upright support column 50, and a base is connected below the support base 12.

[0074] The workbench 10 includes a connecting beam 11, a support base 12, a glass mounting base 13, and a second drive mechanism 14.

[0075] The connecting beam 11 is connected to the support column 50. The support base 12 is connected to the end of the connecting beam 11 away from the support column 50. The glass mounting base 13 is disposed on the support base 12.

[0076] Both ends of the strip baffle 30 are connected to the glass mounting base 13. A limiting window 15 is formed between the strip baffle 30 and the glass mounting base 13. The glass plate 20 is slidably disposed on the glass mounting base 13 along the length direction of the connecting beam 11. One end of the glass plate 20 slides through the limiting window 15. The second drive mechanism 14 is used to drive the glass plate 20 to slide on the glass mounting base 13.

[0077] In this embodiment, the glass plate 20 is driven by the second driving mechanism 14 to slide on the glass mounting base 13, thereby adjusting the position of the aluminum profile 70 on the glass plate 20 in one horizontal direction. Furthermore, when the rotating arm 31 rotates, the glass plate 20 can also be driven to slide by the second driving mechanism 14, thereby abutting the aluminum profile 70 on the glass plate 20 against the strip baffle 30. This causes the line connecting the lens assembly 32 and the second lamp assembly 33 to coincide with or be parallel to the center line of the aluminum profile 70. The glass plate 20 can also slide to adjust the position of the aluminum profile 70.

[0078] In one embodiment, the glass mounting base 13 includes two first mounting posts 131, two second mounting posts 132, and two side plates 133.

[0079] Two first mounting posts 131 are arranged parallel to each other. Two second mounting posts 132 are also arranged parallel to each other, with each end of the second mounting post 132 connected to the ends of the two first mounting posts 131, forming a square frame. Two side plates 133 are connected to the upper ends of the corresponding second mounting posts 132, located on both sides of the glass plate 20. Two ends of a strip baffle 30 are connected to the two side plates 133; a limiting window 15 is formed between the strip baffle 30, the two side plates 133, and the first mounting posts 131. The glass plate 20 is slidably mounted on the two second mounting posts 132.

[0080] In this embodiment, the glass plate 20 slides on the two second mounting posts 132 and between the two side plates 133, and one end of the glass plate 20 is located between the first mounting post 131 and the strip baffle 30. As the glass plate 20 slides, the aluminum profile 70 on the glass plate 20 can abut against the strip baffle 30.

[0081] In one embodiment, the support base 12 has a mounting groove 121. The image measuring instrument for aluminum profile size detection also includes a slider 60, a first drive rod 62, and a first motor 63.

[0082] The slider 60 is slidably disposed within the mounting groove 121. The slider 60 is connected to the lower end of the first mounting post 131, and a first hole 61 is formed on the slider 60. One end of the first drive rod 62 is threadedly connected to the first hole 61. The first motor 63 is connected to the support base 12. The output end of the first motor 63 is connected to the first drive rod 62. The axis of the first drive rod 62 is perpendicular to the sliding direction of the glass plate 20. Furthermore, the slider 60 allows the glass mounting base 13 and the support base 12 to move relative to each other without separating.

[0083] In this embodiment, the first motor 63, which is mounted on the support base 12, drives the first drive rod 62 to rotate, thereby causing the slider 60 to slide in the mounting groove 121, which in turn causes the glass mounting base 13 to slide relative to the support base 12, thereby adjusting the position of the aluminum profile 70 on the glass plate 20 in one horizontal direction.

[0084] In one embodiment, a strip-shaped hole 21 is provided at one end of the glass plate 20 near the strip-shaped baffle 30. The length direction of the strip-shaped hole 21 is parallel to the axis of the first drive rod 62.

[0085] The second drive mechanism 14 includes a limit seat 141, a square rod 143, a second drive rod 145, and a second motor 146.

[0086] The limiting seat 141 is connected to the connecting beam 11, and a square hole 142 is provided on the limiting seat 141. One end of the square rod 143 is slidably disposed in the strip hole 21, and the other end of the square rod 143 passes through the square hole 142 and is provided with a coaxial second hole 144. Specifically, a groove is provided at the end of the square rod 143, and the end of the square rod 143 is engaged with the strip hole 21 through the side wall of the groove, realizing a sliding fit between the end of the square rod 143 and the strip hole 21. The second drive rod 145 is rotatably disposed on the support column 50, and the second drive rod 145 is threadedly connected to the second hole 144. Specifically, a through hole is provided on the support column 50, and the second drive rod 145 is rotatably disposed in the through hole. The second motor 146 is connected to the support column 50, and the output end of the second motor 146 is connected to the second drive rod 145.

[0087] In this embodiment, driven by the second motor 146, the second drive rod 145 rotates, thereby causing the square rod 143 to slide within the square hole 142, which in turn causes the glass plate 20 to slide.

[0088] In one embodiment, the second mounting post 132 has a plurality of mating grooves 16; the plurality of mating grooves 16 are distributed along the length direction of the second mounting post 132; each mating groove 16 is provided with a rotatable roller 17; the roller 17 abuts against the lower end of the glass plate 20. In addition, the roller 17 can be rotatably connected to the corresponding side plate 133, so that the roller 17 will not disengage from the mating groove 16.

[0089] In this embodiment, rollers 17 are provided to reduce the frictional resistance of the glass plate 20.

[0090] In one embodiment, the first drive mechanism 40 includes a rotating shaft 41 and a third motor 42.

[0091] A rotating shaft 41 is rotatably mounted on a support column 50, with one end of the shaft 41 connected to the middle of the rotating arm 31. Specifically, the connection method between the rotating shaft 41 and the support column 50 can be referenced from the connection method between the second drive rod 145 and the support column 50. A third motor 42 is mounted on the support column 50, and the output end of the third motor 42 is connected to the end of the rotating shaft 41 away from the rotating arm 31.

[0092] In this embodiment, the third motor 42 drives the rotating arm 31 to reciprocate within a 90-degree range via the rotating shaft 41 so that the lens group 32 can acquire images of the aluminum profile 70 on the glass plate 20 from directly above and from the side.

[0093] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A video measuring instrument for size detection of an aluminum profile, characterized in that, The utility model relates to a kind of image measuring instrument for aluminium profile size detection, including: Rack; Workbench (10), the workbench (10) is set on the rack; Glass plate (20), the glass plate (20) is set on the workbench (10), the glass plate (20) is used to carry aluminium profile (70); Strip baffle (30), connect with the workbench (10), located above the glass plate (20), its side can block the side of aluminium profile (70); Rotary arm (31), the middle part of the rotary arm (31) is rotatably connected with the rack; Lens group (32), set in the upper end of the rotary arm (31); First lamp group, set in the upper end of the rotary arm (31); Second lamp group (33), set in the lower end of the rotary arm (31), opposite the lens group (32); And First driving mechanism (40), for driving the rotary arm (31) rotation; The glass plate (20) is located between the lens group (32) and the second lamp group (33);The rotary center of the rotary arm (31) is located on the upper side of the glass plate (20).

2. The video measuring instrument for detecting the size of aluminum profile according to claim 1, characterized in that, The rack includes vertical support column (50); The workbench (10) includes: Connecting beam (11), connect with the support column (50); Support seat (12), connect with the connecting beam (11) away from one end of the support column (50); Glass mounting seat (13), set in the support seat (12);And Second driving mechanism (14); Two ends of the strip baffle (30) are connected with the glass mounting seat (13);The strip baffle (30) and the glass mounting seat (13) form a limiting window (15);The glass plate (20) is slidably arranged on the glass mounting seat (13) along the length direction of the connecting beam (11);One end of the glass plate (20) slides through the limiting window (15);The second driving mechanism (14) is used to drive the glass plate (20) to slide on the glass mounting seat (13).

3. The video measuring instrument for detecting the size of aluminum profile according to claim 2, characterized in that, The glass mounting seat (13) includes: Two first mounting columns (131) are arranged in parallel with each other; Two second mounting columns (132) are arranged in parallel with each other, and two ends of each second mounting column (132) are connected with ends of two first mounting columns (131), respectively, and two second mounting columns (132) and two first mounting columns (131) form a square frame;And Two side plates (133) are connected with upper ends of corresponding second mounting columns (132), respectively, and two side plates (133) are located on two sides of the glass plate (20); Two ends of the strip baffle (30) are connected with two side plates (133), respectively;The strip baffle (30), two side plates (133) and the first mounting column (131) form the limiting window (15);The glass plate (20) is slidably arranged on two second mounting columns (132).

4. The video measuring instrument for detecting the size of aluminum profile according to claim 3, characterized in that, Mounting groove (121) is formed in the support seat (12);The image measuring instrument for aluminium profile size detection further includes: A sliding block (60) is slidingly arranged in the mounting groove (121) and connected with the lower end of the first mounting column (131), and a first hole (61) is formed in the sliding block (60); A first driving rod (62) is threadedly connected with the first hole (61) at one end; and A first motor (63) is connected with the support base (12), and an output end of the first motor (63) is connected with the first driving rod (62); The axis of the first driving rod (62) is perpendicular to the sliding direction of the glass plate (20).

5. The video measuring instrument for size detection of aluminum profile according to claim 4, characterized in that, A strip-shaped hole (21) is formed in one end of the glass plate (20) close to the strip-shaped baffle (30), and the length direction of the strip-shaped hole (21) is parallel to the axis of the first driving rod (62); The second driving mechanism (14) comprises: A limiting seat (141) is connected with the connecting beam (11), and a square hole (142) is formed in the limiting seat (141); A square rod (143) is slidingly arranged in the strip-shaped hole (21) at one end and passes through the square hole (142) at the other end, and a coaxial second hole (144) is formed in the square rod (143); A second driving rod (145) is rotatably arranged on the support column (50), and the second driving rod (145) is threadedly connected with the second hole (144); and A second motor (146) is connected with the support column (50), and an output end of the second motor (146) is connected with the second driving rod (145).

6. The video measuring instrument for detecting the size of aluminum profile according to claim 5, characterized in that, A plurality of matching grooves (16) are formed in the second mounting column (132), and the matching grooves (16) are distributed along the length direction of the second mounting column (132); a rotatable roller (17) is arranged in each matching groove (16); and the roller (17) abuts against the lower end of the glass plate (20).

7. The video measuring instrument for size detection of aluminum profile according to claim 6, characterized in that, The first driving mechanism (40) comprises: A rotating shaft (41) is rotatably arranged on the support column (50), and one end of the rotating shaft (41) is connected with the middle part of the rotating arm (31); and A third motor (42) is arranged on the support column (50), and an output end of the third motor (42) is connected with one end of the rotating shaft (41) away from the rotating arm (31).