Deformed steel bar surface defect detection device based on machine vision

Abstract

The utility model discloses a deformed steel bar surface defect detection device based on machine vision, which comprises a detection component, and the detection component comprises a working plate and a support frame; the movable assembly comprises a supporting plate, a guide rod, a movable plate, an electric telescopic rod, a rotating disc, a first sleeve, a positioning pipe and a second sleeve; the supporting plate is fixedly connected to one side of the upper end of the working plate, the two ends of the guide rod are fixedly connected to the two ends of the inner side of the supporting plate and the two ends of the outer side of the supporting frame respectively, the outer surface of the guide rod is sleeved with the movable plate, and the electric telescopic rod is fixedly connected to the center of the outer side of the supporting plate. The first sleeve is fixedly connected to the center of the outer surface of the rotating disc, the positioning pipe is fixedly connected to the center inside one side of the supporting frame, and the second sleeve is fixedly connected to the center inside the other side of the supporting frame. There is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of threaded steel surface defect detection, in particular to a threaded steel surface defect detection device based on machine vision. Background Art

[0002] Rebar, a fundamental material in modern construction, is widely used. During the rolling process, surface defects are often detected in time, leading to significant waste. Therefore, rapid detection of defects is crucial so workers can adjust mill pressure or replace rolling equipment. Currently, machine vision systems are commonly used to detect surface defects in rebar.

[0003] When using machine vision to inspect the surface defects of existing rebar, the position of the rebar needs to be adjusted so that the position of the outer surface of the rebar corresponds to the outer surface of the comparison pattern. When the position of the outer surface of the rebar deviates, it is easy to deviate from the comparison pattern, resulting in inaccurate detection. Adjusting the outer surface of the rebar requires the operator to manually adjust it multiple times, which is a cumbersome operation. Utility Model Content

[0004] The purpose of the present utility model is to provide a surface defect detection device for threaded steel based on machine vision to solve the problem proposed in the above background technology that when the existing threaded steel is subjected to surface defect detection using machine vision, the position of the threaded steel needs to be adjusted so that the position of the outer surface of the threaded steel corresponds to the outer surface of the comparison pattern. When the position of the outer surface of the threaded steel deviates, it is easy to deviate from the comparison pattern, thereby resulting in inaccurate detection. Moreover, the adjustment of the outer surface of the threaded steel requires the operator to manually adjust it multiple times, which is a cumbersome operation.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model is a device for detecting surface defects of threaded steel bars based on machine vision, comprising:

[0007] A detection assembly, comprising a working plate and a support frame;

[0008] A movable assembly, comprising a support plate, a guide rod, a movable plate, an electric telescopic rod, a turntable, a first sleeve, a positioning tube, and a second sleeve;

[0009] The support plate is fixedly connected to one side of the upper end of the working plate, the two ends of the guide rod are respectively fixedly connected to the two ends of the inner side of the support plate and the two ends of the outer side of the support frame, the movable plate is sleeved on the outer surface of the guide rod, the electric telescopic rod is fixedly connected to the central position of the outer side of the support plate, the turntable is sleeved on the central inner position of one side of the movable plate, the first sleeve is fixedly connected to the central position of the outer surface of the turntable, the positioning tube is fixedly connected to the central position of the inner side of one side of the support frame, and the second sleeve is fixedly connected to the central position of the inner side of the other side of the support frame.

[0010] Furthermore, the detection component also includes a light source and a camera;

[0011] The support frame is fixedly connected to one side of the upper end of the working plate, the light source is fixedly connected to both sides of the top end inside the support frame, and the camera is fixedly connected to the center of the top end inside the support frame.

[0012] Furthermore, the electric telescopic rod passes through the support plate and is fixedly connected to the outer side of the movable plate, and a threaded structure is provided inside the positioning tube relative to the outer surface of the threaded steel bar.

[0013] Furthermore, the first sleeve, the positioning tube and the second sleeve are collinear, and a hollow structure is provided inside one side of the movable plate and is opened relative to the turntable.

[0014] Furthermore, it also includes auxiliary components, which include a light meter, a hot air blower, a connecting pipe and a nozzle;

[0015] The light meter is fixedly connected to the upper end of the working plate, the hot air blower is fixedly connected to the upper end of the support frame, one end of the connecting pipe is fixedly connected to the outer end of the hot air blower, and the nozzle is fixedly connected to the two ends of the center of the top end inside the support frame.

[0016] Furthermore, the other end of the connecting pipe is fixedly connected to the top of the nozzle, and the light meter is located below the light source, and the light meter is electrically connected to the hot air blower through a circuit.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. The utility model sets a movable component to place the two ends of the threaded steel bar inside the first sleeve and the positioning tube respectively, and then controls the extension of the electric telescopic rod to make one end of the threaded steel bar enter the first sleeve and move toward the positioning tube driven by the turntable. The threaded steel bar is positioned by the threaded structure inside the positioning tube, so that the position of the threaded steel bar photo taken by the camera is consistent with the position of the comparison photo, avoiding detection deviation caused by shooting position deviation, and no manual adjustment is required. The operation is simple and easy to use.

[0019] 2. Based on the first beneficial effect, by setting up auxiliary components, since there is a lot of fog in the rebar production workshop, and the fog will affect the camera's shooting of the rebar, the intensity of the light source is measured by a light meter. When the fog is large and the intensity of the light source is reduced, the hot air blower is started to discharge the hot air from the connecting pipe into the inside of the nozzle, and then from the inside of the nozzle to the inside of the support frame, so that the fog inside the support frame is discharged outward, thereby increasing the accuracy of the camera when shooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is the main view of the utility model;

[0022] Figure 2 This is a structural diagram of the detection component of the utility model;

[0023] Figure 3 This is a structural diagram of the active components of the utility model;

[0024] Figure 4 This is a structural diagram of the auxiliary components of the utility model.

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0026] 11. Working plate; 12. Support frame; 13. Light source; 14. Camera; 21. Support plate; 22. Guide rod; 23. Movable plate; 24. Electric telescopic rod; 25. Turntable; 26. First sleeve; 27. Positioning tube; 28. Second sleeve; 31. Light meter; 32. Hot air blower; 33. Connecting pipe; 34. Nozzle. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0031] See also Figure 1-3 As shown, this embodiment is a threaded steel surface defect detection device based on machine vision, comprising:

[0032] Detection assembly, the detection assembly includes a working plate 11 and a support frame 12;

[0033] The movable assembly includes a support plate 21, a guide rod 22, a movable plate 23, an electric telescopic rod 24, a turntable 25, a first sleeve 26, a positioning tube 27 and a second sleeve 28;

[0034] The support plate 21 is fixedly connected to one side of the upper end of the working plate 11, the two ends of the guide rod 22 are respectively fixedly connected to the two ends of the inner side of the support plate 21 and the two ends of the outer side of the support frame 12, the movable plate 23 is sleeved on the outer surface of the guide rod 22, the electric telescopic rod 24 is fixedly connected to the central position of the outer side of the support plate 21, the turntable 25 is sleeved on the central inner position of one side of the movable plate 23, the first sleeve 26 is fixedly connected to the central position of the outer surface of the turntable 25, the positioning tube 27 is fixedly connected to the inner central position of one side of the support frame 12, and the second sleeve 28 is fixedly connected to the inner central position of the other side of the support frame 12;

[0035] The support plate 21 is used to support the guide rod 22 and the electric telescopic rod 24. The guide rod 22 is used to support and guide the movable plate 23. The movable plate 23 is used to support the turntable 25. The electric telescopic rod 24 is used to drive the movable plate 23 to move horizontally. The turntable 25 is used to support the first sleeve 26. The first sleeve 26 is used to support one end of the threaded steel bar. The positioning tube 27 is used to limit the threaded steel bar. The second sleeve 28 is used to support the other end of the threaded steel bar.

[0036] The detection assembly also includes a light source 13 and a camera 14;

[0037] The support frame 12 is fixedly connected to one side of the upper end of the working plate 11, the light source 13 is fixedly connected to both sides of the top of the inner portion of the support frame 12, and the camera 14 is fixedly connected to the center of the top of the inner portion of the support frame 12;

[0038] The working plate 11 is used to support the support frame 12, and the support frame 12 is used to support the light source 13 and the camera 14. The light source 13 is used to emit light, and the camera 14 is used to take pictures of the outer surface of the threaded steel bar;

[0039] The electric telescopic rod 24 passes through the support plate 21 and is fixedly connected to the outer side of the movable plate 23, and the interior of the positioning tube 27 has a threaded structure relative to the outer surface of the threaded steel bar;

[0040] When the electric telescopic rod 24 is extended, the electric telescopic rod 24 drives the movable plate 23 to move horizontally along the guide rod 22;

[0041] The first sleeve 26, the positioning tube 27 and the second sleeve 28 are collinear, and a hollow structure is provided inside one side of the movable plate 23 relative to the turntable 25;

[0042] One end of the threaded steel bar moves outward through the positioning tube 27 to the inside of the second sleeve 28 and extends outward from the second sleeve 28;

[0043] Working principle: When machine vision inspection of defects on the outer surface of threaded steel is required, the two ends of the threaded steel are placed inside the first sleeve 26 and the positioning tube 27 respectively, and then the electric telescopic rod 24 is controlled to extend. The extension of the electric telescopic rod 24 drives the movable plate 23 to move along the guide rod 22. At this time, the threaded steel moves outward driven by the first sleeve 26, and the threaded steel is limited by the threaded structure inside the positioning tube 27. The threaded steel can maintain the same state at the same position inside the support frame 12, so that the camera 14 can shoot the same position of the threaded steel, and the threaded steel passes through the positioning tube 27 into the second sleeve 28 and moves outward. The threaded steel can be removed from the outside of the second sleeve 28. The entire operation process will not affect the camera 14's shooting of the threaded steel.

[0044] See also Figure 4 As shown, this embodiment is based on the above embodiment and also includes:

[0045] Auxiliary components, including a light meter 31, a hot air blower 32, a connecting pipe 33 and a nozzle 34;

[0046] The light meter 31 is fixedly connected to the upper end of the working plate 11, the hot air blower 32 is fixedly connected to the upper end of the support frame 12, one end of the connecting pipe 33 is fixedly connected to the outer end of the hot air blower 32, and the nozzle 34 is fixedly connected to the inner center of the top end of the support frame 12.

[0047] The photometer 31 is used to measure the intensity of light received by the light source 13. The hot air blower 32 is used to generate hot air and discharge it into the connecting pipe 33. The connecting pipe 33 is used to connect the hot air blower 32 and the nozzle 34. The nozzle 34 is used to discharge the hot air into the support frame 12.

[0048] The other end of the connecting pipe 33 is fixedly connected to the top of the nozzle 34, and the light meter 31 is located below the light source 13. The light meter 31 is electrically connected to the hot air blower 32 through a circuit.

[0049] When the light intensity of the light source 13 measured by the light meter 31 decreases, it indicates that there is more fog inside the support frame 12;

[0050] Working principle: When inspecting threaded steel, if the light intensity emitted by the light source 13 measured by the light meter 31 remains unchanged, it means that there is less fog inside the support frame 12 and there is no obstruction to the propagation of light, so that the camera 14 will not be blurred when photographing the threaded steel. When the light intensity emitted by the light source 13 measured by the light meter 31 weakens, it means that there is more fog inside the support frame 12, which obstructs the propagation of light, so that the camera 14 may be blurred when photographing the threaded steel. At this time, start the hot air blower 32, and the hot air blower 32 generates hot air and is discharged into the nozzle 34 through the connecting pipe 33, and then discharged into the support frame 12 through the nozzle 34, so that the fog inside the support frame 12 is dissipated outward to avoid affecting the camera 14.

[0051] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0052] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A surface defect detection device for threaded steel bars based on machine vision, characterized in that: include: A detection assembly, the detection assembly comprising a working plate (11) and a support frame (12); A movable assembly, comprising a support plate (21), a guide rod (22), a movable plate (23), an electric telescopic rod (24), a turntable (25), a first sleeve (26), a positioning tube (27) and a second sleeve (28); The support plate (21) is fixedly connected to a position on one side of the upper end of the working plate (11); the two ends of the guide rod (22) are fixedly connected to the two ends of the inner side of the support plate (21) and the two ends of the outer side of the support frame (12); the movable plate (23) is sleeved on the outer surface of the guide rod (22); the electric telescopic rod (24) is fixedly connected to the central position of the outer side of the support plate (21); the turntable (25) is sleeved on the central inner position of one side of the movable plate (23); the first sleeve (26) is fixedly connected to the central position of the outer surface of the turntable (25); the positioning tube (27) is fixedly connected to the central position of the inner side of one side of the support frame (12); and the second sleeve (28) is fixedly connected to the central position of the inner side of the other side of the support frame (12).

2. The machine vision-based threaded steel surface defect detection device according to claim 1, characterized in that: The detection assembly further includes a light source (13) and a camera (14); The support frame (12) is fixedly connected to one side of the upper end of the working plate (11), the light source (13) is fixedly connected to both sides of the top of the inner top of the support frame (12), and the camera (14) is fixedly connected to the center of the top of the inner top of the support frame (12).

3. The machine vision-based threaded steel surface defect detection device according to claim 1, characterized in that: The electric telescopic rod (24) passes through the support plate (21) and is fixedly connected to the outer side of the movable plate (23), and the interior of the positioning tube (27) has a threaded structure opened relative to the outer surface of the threaded steel bar.

4. The device for detecting surface defects of threaded steel bars based on machine vision according to claim 1, characterized in that: The first sleeve (26), the positioning tube (27) and the second sleeve (28) are collinear, and a hollow structure is provided inside one side of the movable plate (23) and is opened relative to the turntable (25).

5. The device for detecting surface defects of threaded steel bars based on machine vision according to claim 1, characterized in that: It also includes auxiliary components, which include a light meter (31), a hot air blower (32), a connecting pipe (33) and a nozzle (34); The light meter (31) is fixedly connected to the upper end of the working plate (11), the hot air blower (32) is fixedly connected to the upper end of the support frame (12), one end of the connecting pipe (33) is fixedly connected to the outer end of the hot air blower (32), and the nozzle (34) is fixedly connected to the two end positions of the center of the top end inside the support frame (12).

6. The machine vision-based threaded steel surface defect detection device according to claim 5, characterized in that: The other end of the connecting pipe (33) is fixedly connected to the top of the nozzle (34), and the light meter (31) is located below the light source (13). The light meter (31) is electrically connected to the hot air blower (32) through a circuit.

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