Workpiece multi-surface inspection apparatus and method

Abstract

The present application relates to a workpiece multi-surface detection device and a method for detecting a multi-surface workpiece by using the workpiece multi-surface detection device. The workpiece multi-surface detection device comprises a rotating workbench configured to carry the multi-surface workpiece and drive the multi-surface workpiece to sequentially pass through a plurality of shooting assemblies when rotating; and a plurality of shooting assemblies sequentially arranged at different stations along the rotating direction of the rotating workbench, each of the shooting assemblies comprising a surface image capturing device configured to capture an image of a corresponding one of the circumferential surfaces of the multi-surface workpiece when the multi-surface workpiece passes through, and configured to form a first offset angle and a second offset angle with the corresponding one of the circumferential surfaces respectively when capturing the image of the corresponding one of the circumferential surfaces. The workpiece multi-surface detection device improves the detection efficiency and saves the working space.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of workpiece detection, and particularly relates to a workpiece multi-surface detection device and a method for detecting a multi-surface workpiece by using the workpiece multi-surface detection device. BACKGROUND

[0002] In the process of manufacturing workpieces, it is often necessary to detect the workpieces, for example, by acquiring images of the surfaces of the workpieces by cameras to detect the sizes and surface defects of the workpieces. However, a workpiece usually has multiple surfaces, and the existing detection devices can usually only detect one surface of the workpiece at a time, and cannot detect multiple surfaces at a time, which is low in detection efficiency. Therefore, how to quickly and efficiently detect multiple surfaces of a workpiece has become a major problem in the industry. In addition, the existing detection devices are usually large in overall size when meeting the shooting distance between the camera and the workpiece, which is not conducive to saving space. SUMMARY

[0003] The present application aims to solve at least one of the above problems and defects in the prior art.

[0004] According to one aspect of the present application, a workpiece multi-surface detection device is provided, which comprises:

[0005] a rotating worktable configured to carry a multi-surface workpiece and drive the multi-surface workpiece to sequentially pass through a plurality of shooting assemblies when rotating; and

[0006] the plurality of shooting assemblies are sequentially arranged at different stations along the rotation direction of the rotating worktable, each shooting assembly comprising a surface image capturing device configured to capture an image of a corresponding one of the circumferential surfaces of the multi-surface workpiece when passing through, and configured to form a first offset angle and a second offset angle with the corresponding one of the circumferential surfaces when capturing the image of the corresponding one of the circumferential surfaces,

[0007] wherein the first offset angle refers to the included angle formed between the normal direction of the corresponding one of the circumferential surfaces and the orthogonal projection of the optical axis of the image capturing device in a plane perpendicular to the rotation axis of the rotating worktable, and

[0008] wherein the second offset angle refers to the included angle formed between the normal direction of the corresponding one of the circumferential surfaces and the orthogonal projection of the optical axis of the image capturing device in a plane parallel to the rotation axis of the rotating worktable and perpendicular to the corresponding one of the circumferential surfaces.

[0009] According to one example embodiment of the present disclosure, one of the plurality of photographing assemblies is a rear surface photographing assembly, the image capturing device is a rear surface camera of the rear surface photographing assembly, the rear surface camera is located outside the rotary table and is higher than the multi-surface workpiece in a direction perpendicular to the rotary table, the circumferential surface includes a rear surface of the multi-surface workpiece in the rotation direction, and the rear surface camera is configured to capture an image of the rear surface of the multi-surface workpiece in the rotation direction as the multi-surface workpiece passes by.

[0010] According to another example embodiment of the present disclosure, one of the plurality of photographing assemblies is an inside surface photographing assembly, the image capturing device is an inside surface camera of the inside surface photographing assembly, the inside surface camera is located inside the rotary table and is higher than the multi-surface workpiece in a direction perpendicular to the rotary table, the circumferential surface includes an inside surface of the multi-surface workpiece facing the center of the rotary table, and the inside surface camera is configured to capture an image of the inside surface of the multi-surface workpiece facing the center of the rotary table as the multi-surface workpiece passes by.

[0011] According to another example embodiment of the present disclosure, one of the plurality of photographing assemblies is an outside surface photographing assembly, the image capturing device is an outside surface camera of the outside surface photographing assembly, the outside surface camera is located outside the rotary table and is higher than the multi-surface workpiece in a direction perpendicular to the rotary table, the circumferential surface includes an outside surface of the multi-surface workpiece facing away from the center of the rotary table, and the outside surface camera is configured to capture an image of the outside surface of the multi-surface workpiece facing away from the center of the rotary table as the multi-surface workpiece passes by.

[0012] According to another example embodiment of the present disclosure, one of the plurality of photographing assemblies is a front surface photographing assembly, the image capturing device is a front surface camera of the front surface photographing assembly, the front surface camera is located outside the rotary table and is higher than the multi-surface workpiece in a direction perpendicular to the rotary table, the circumferential surface includes a front surface of the multi-surface workpiece in the rotation direction, and the front surface camera is configured to capture an image of the front surface of the multi-surface workpiece in the rotation direction as the multi-surface workpiece passes by.

[0013] According to another example embodiment of the present disclosure, the first offset angle and the second offset angle are each greater than or equal to 0 degrees and less than or equal to 30 degrees.

[0014] According to another exemplary embodiment of the present application, the workpiece multi-surface inspection apparatus further comprises a lateral surface photographing assembly, which comprises a lateral surface camera located above or below the rotary table, the lateral surface camera being configured to capture an image of a lateral surface of the multi-surface workpiece as the multi-surface workpiece passes by, the lateral surface being a surface of the multi-surface workpiece facing or away from the rotary table, and the lateral surface camera being configured to form a third and a fourth offset angle with the lateral surface respectively when capturing the image of the lateral surface,

[0015] wherein the third offset angle refers to an included angle formed between a normal direction of the lateral surface and a normal projection of an optical axis of the lateral surface camera on a first reference plane, the first reference plane being parallel to a rotation axis of the rotary table and perpendicular to the lateral surface;

[0016] wherein the fourth offset angle refers to an included angle formed between the normal direction of the lateral surface and a normal projection of the optical axis of the lateral surface camera on a second reference plane, the second reference plane being parallel to the rotation axis of the rotary table and perpendicular to the lateral surface, the first reference plane and the second reference plane being perpendicular to each other.

[0017] According to another exemplary embodiment of the present application, the third and the fourth offset angle are both greater than or equal to 0 degree and less than or equal to 30 degrees.

[0018] According to another exemplary embodiment of the present application, each of the photographing assemblies further comprises a light source for providing illumination for the corresponding one surface and a bracket, the light source and the image capturing device being mounted on the bracket.

[0019] According to another exemplary embodiment of the present application, the brackets of two adjacent photographing assemblies are independent of each other or connected to each other.

[0020] According to another exemplary embodiment of the present application, the plurality of photographing assemblies are distributed within a range of one rotation half of the rotary table.

[0021] According to another aspect of the present application, there is provided a method for inspecting a multi-surface workpiece by using the above-mentioned workpiece multi-surface inspection apparatus, the method comprising the following steps:

[0022] placing a multi-surface workpiece on the rotary table and rotating the rotary table to make the multi-surface workpiece pass by the plurality of photographing assemblies in turn;

[0023] An image capture device of one of the shooting assemblies captures an image of a corresponding one of the peripheral side surfaces of the multi-surface workpiece each time the multi-surface workpiece passes by the one shooting assembly; and

[0024] The first offset angle and the second offset angle are recorded while the image capture device captures the image of the corresponding one of the peripheral side surfaces.

[0025] According to one exemplary embodiment of the present application, when the multi-surface workpiece (2) is a cuboid, the method further comprises the following steps:

[0026] The size of the corresponding one of the peripheral side surfaces is calculated by the following formula:

[0027] Formula (1):

[0028] wherein E1 is the length of one side of the corresponding one of the peripheral side surfaces, and e1 is the length of the image of the one side, and a1 is the first offset angle;

[0029] Formula (2):

[0030] wherein E2 is the length of another side of the corresponding one of the peripheral side surfaces adjacent to the one side, and e2 is the length of the image of the another side, and a2 is the second offset angle.

[0031] In the foregoing various exemplary embodiments of the present application, the provided workpiece multi-surface detection device can detect multiple surfaces of a workpiece at one time, greatly improving the detection efficiency; and unlike the prior detection device which must arrange a camera parallel to a rotating worktable at a relatively far distance to meet the shooting distance requirement, the workpiece multi-surface detection device of the present application can meet the shooting distance requirement and reduce the size of the entire detection device by setting reasonable offset angles.

[0032] Other objects and advantages of the present application will become apparent and help to understand the present application from the following description of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly described below, and it should be known that the drawings described below only relate to some embodiments of the present application, not to the limitation of the present application, wherein:

[0034] Figure 1 is a schematic diagram showing the overall structure of the workpiece multi-surface detection device according to the embodiments.

[0035] Figure 2is a schematic diagram showing a back surface photographing assembly according to an embodiment.

[0036] Figures 3(a) to 3(c) is a schematic diagram showing a back surface photographing assembly according to an embodiment.

[0037] Figure 4 is a schematic diagram showing an inner side surface photographing assembly according to an embodiment.

[0038] Figures 5(a) to 5(c) is a schematic diagram showing an inner side surface photographing assembly according to an embodiment.

[0039] Figure 6 is a schematic diagram showing an outer side surface photographing assembly according to an embodiment.

[0040] Figures 7(a) to 7(c) is a schematic diagram showing an outer side surface photographing assembly according to an embodiment.

[0041] Figure 8 is a schematic diagram showing a front surface photographing assembly according to an embodiment.

[0042] Figures 9(a) to 9(c) is a schematic diagram showing a front surface photographing assembly according to an embodiment.

[0043] Figure 10 is a schematic diagram showing a lateral surface photographing assembly according to an embodiment.

[0044] Figures 11(a) to 11(c) is a schematic diagram showing a lateral surface photographing assembly according to an embodiment.

[0045] Reference Signs:

[0046] 1, rotating table; 2, multi-surface workpiece; 21, back surface of multi-surface workpiece; 22, inner side surface of multi-surface workpiece; 23, outer side surface of multi-surface workpiece; 24, front surface of multi-surface workpiece; 25, lateral surface of multi-surface workpiece; 3, back surface photographing assembly; 31, back surface camera; 4, inner side surface photographing assembly; 41, inner side surface camera; 5, outer side surface photographing assembly; 51, outer side surface camera; 6, front surface photographing assembly; 61, front surface camera; 7, lateral surface photographing assembly; 71, lateral surface camera; 8, light source; 9, stand. DETAILED DESCRIPTION

[0047] For the purpose of making the objectives, technical solutions and superiorities of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. It should be understood that the following description of the embodiments is intended to explain and illustrate the general inventive concept of the present application, and should not be understood as limiting the present application. In the description and drawings, identical or similar reference numerals refer to identical or similar components or members. For the sake of clarity, the drawings are not necessarily to scale and some well-known components and structures can be omitted from the drawings.

[0048] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the ordinary meaning as understood by a person having ordinary skill in the art to which the present application pertains. The terms "first", "second" and similar terms used in the present application do not denote any order, quantity or importance, but are used to distinguish different components. The term "a" or "an" does not exclude a plurality. The terms "comprising" or "including" or similar terms mean that the elements or objects before the term encompass the elements or objects listed after the term and equivalents thereof, without excluding other elements or objects. The terms "connected" or "coupled" or similar terms do not limit to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", "top" or "bottom" and the like merely indicate relative positional relationships when the absolute positions of the described objects are changed, and the relative positional relationships can also be changed accordingly. When an element is referred to as being "on" or "under" another element, the element can be "directly" on or under the other element, or there can be an intermediate element.

[0049] As shown in Figures 1 to 11(c) An embodiment of the present application provides a workpiece multi-surface detection device, which generally comprises a rotating table 1 and a plurality of shooting assemblies 3, 4, 5, 6. The rotating table 1 is configured to carry a multi-surface workpiece 2 and drive the multi-surface workpiece 2 to pass through the plurality of shooting assemblies 3, 4, 5, 6 in turn when rotating. The plurality of shooting assemblies 3, 4, 5, 6 are arranged at different stations in turn along the rotating direction of the rotating table 1, which enables different shooting assemblies to work independently at different stations without affecting each other, especially avoiding the influence between illuminations at different stations.

[0050] Each of the plurality of photographing assemblies comprises a surface image capturing device 31, 41, 51, 61 configured to capture an image of a corresponding one of the peripheral side surfaces of the multi-surface workpiece 2 as the multi-surface workpiece 2 passes by, and configured to form a first offset angle and a second offset angle with the corresponding one of the peripheral side surfaces respectively when capturing the image of the corresponding one of the peripheral side surfaces, wherein the first offset angle refers to an included angle formed between a normal direction of the corresponding one of the peripheral side surfaces and a normal projection of an optical axis of the image capturing device in a plane perpendicular to a rotation axis of the rotary table 1, and wherein the second offset angle refers to an included angle formed between a normal direction of the corresponding one of the peripheral side surfaces and a normal projection of the optical axis of the image capturing device in a plane parallel to the rotation axis of the rotary table 1 and perpendicular to the corresponding one of the peripheral side surfaces.

[0051] The specific structure of the multi-surface workpiece detection device will be described in detail below with reference to specific drawings and taking a cuboid-shaped multi-surface workpiece as an example.

[0052] As shown in FIG. 3(a), the rear surface camera 31 is configured to capture an image of the rear surface 21 of the multi-surface workpiece 2 in the rotation direction as the multi-surface workpiece 2 passes by. Moreover, as shown in FIG. 3(b), the first offset angle a1 and the second offset angle a2 can be greater than 0 degrees and less than or equal to 30 degrees. Figure 2 As shown in FIG. 5(a), the inner side surface camera 41 is configured to capture an image of the inner side surface 22 of the multi-surface workpiece 2 facing the center of the rotary table 1 as the multi-surface workpiece 2 passes by. Moreover, as shown in FIG. 5(b), the first offset angle a1 is 0 degrees, and the second offset angle a2 is greater than 0 degrees and less than or equal to 30 degrees. Figures 3(b) to 3(c)

[0053] As shown in FIG. 5(a), the inner side surface camera 41 is configured to capture an image of the inner side surface 22 of the multi-surface workpiece 2 facing the center of the rotary table 1 as the multi-surface workpiece 2 passes by. Moreover, as shown in FIG. 5(b), the first offset angle a1 is 0 degrees, and the second offset angle a2 is greater than 0 degrees and less than or equal to 30 degrees. Figure 4 As shown in FIG. 5(a), the inner side surface camera 41 is configured to capture an image of the inner side surface 22 of the multi-surface workpiece 2 facing the center of the rotary table 1 as the multi-surface workpiece 2 passes by. Moreover, as shown in FIG. 5(b), the first offset angle a1 is 0 degrees, and the second offset angle a2 is greater than 0 degrees and less than or equal to 30 degrees. Figures 5(b) to 5(c) As shown in FIG. 5(a), the inner side surface camera 41 is configured to capture an image of the inner side surface 22 of the multi-surface workpiece 2 facing the center of the rotary table 1 as the multi-surface workpiece 2 passes by. Moreover, as shown in FIG. 5(b), the first offset angle a1 is 0 degrees, and the second offset angle a2 is greater than 0 degrees and less than or equal to 30 degrees.​

[0054] As shown in FIG. 6(a), the lateral surface camera 71 is configured to capture an image of the lateral surface 25 of the multi-surface workpiece 2 when the multi-surface workpiece 2 passes by. As shown in FIG. 6(b) and FIG. 6(c), the first offset angle a1 and the second offset angle a2 can be greater than 0 degree and less than or equal to 30 degree. Figure 6 As shown in FIG. 7(a), the outer lateral surface camera 51 is configured to capture an image of the outer lateral surface 23 of the multi-surface workpiece 2 when the multi-surface workpiece 2 passes by. As shown in FIG. 7(b) and FIG. 7(c), the first offset angle a1 is 0 degree, and the second offset angle a2 is greater than 0 degree and less than or equal to 30 degree.

[0055] As shown in FIG. 9(a), the front surface camera 61 is configured to capture an image of the front surface 24 of the multi-surface workpiece 2 when the multi-surface workpiece 2 passes by. As shown in FIG. 9(b) and FIG. 9(c), the first offset angle a1 and the second offset angle a2 can be greater than 0 degree and less than or equal to 30 degree. Figure 8 As shown in FIG. 9(a), the front surface camera 61 is configured to capture an image of the front surface 24 of the multi-surface workpiece 2 when the multi-surface workpiece 2 passes by. As shown in FIG. 9(b) and FIG. 9(c), the first offset angle a1 and the second offset angle a2 can be greater than 0 degree and less than or equal to 30 degree.

[0056] As shown in FIG. 6(a), the lateral surface camera 71 is configured to capture an image of the lateral surface 25 of the multi-surface workpiece 2 when the multi-surface workpiece 2 passes by. As shown in FIG. 6(b) and FIG. 6(c), the first offset angle a1 and the second offset angle a2 can be greater than 0 degree and less than or equal to 30 degree. Figure 10 As shown in FIG. 6(a), the lateral surface camera 71 is configured to capture an image of the lateral surface 25 of the multi-surface workpiece 2 when the multi-surface workpiece 2 passes by. As shown in FIG. 6(b) and FIG. 6(c), the first offset angle a1 and the second offset angle a2 can be greater than 0 degree and less than or equal to 30 degree.

[0057] The lateral surface is a surface of the multi-surface workpiece 2 facing or away from the rotary table 1, as shown in FIG. 11(a), the lateral surface of the embodiment is the bottom surface of the multi-surface workpiece 2, and the lateral surface camera 71 is configured to form a third offset angle and a fourth offset angle with the lateral surface respectively when capturing the image of the lateral surface. Among them, the third offset angle refers to the included angle formed by the normal direction of the lateral surface and the projection of the optical axis of the lateral surface camera on the first reference plane, the first reference plane is parallel to the rotation axis of the rotary table 1 and perpendicular to the lateral surface 25; wherein the fourth offset angle refers to the included angle formed by the normal direction of the lateral surface and the projection of the optical axis of the lateral surface camera on the second reference plane, the second reference plane is parallel to the rotation axis of the rotary table 1 and perpendicular to the lateral surface 25, and the first reference plane and the second reference plane are perpendicular to each other. In the embodiment, the third offset angle and the fourth offset angle can be greater than or equal to 0 degrees and less than or equal to 30 degrees. For example, as shown in FIG. 11(b) and FIG. 11(c), the third offset angle and the fourth offset angle of the embodiment are both 0 degrees.

[0058] In addition, as shown in the above figures, each of the shooting assemblies further comprises a light source 8 and a bracket 9, the light source 8 is used to provide illumination for the corresponding one surface, and the light source 8 and the image capturing device 31, 41, 51, 61 are mounted on the bracket 9. The brackets of two adjacent shooting assemblies can be independent of each other or connected to each other. In the embodiment, as shown in the figures, the brackets of two adjacent shooting assemblies are actually connected to each other, and each bracket is staggered with intervals to avoid mutual influence between different light sources. Figure 1

[0059] As can be seen from the above, Figure 1 the plurality of shooting assemblies 3, 4, 5, 6 and the lateral surface shooting assembly 7 are distributed within one rotation half cycle of the rotary table 1, so that the rotary table only needs to rotate half a cycle to complete the shooting and detection of multiple circumferential surfaces of one multi-surface workpiece, thereby further improving the detection efficiency.

[0060] In addition, the rotary table is of transparent material, and the driving mode of the rotary table is not specifically limited in the embodiment, and a conventional driving mode in the art can be used to drive the rotary table. Similarly, the image capturing device is not specially selected in the embodiment, and a commonly used image capturing device in the art can be selected, for example, the camera with a protruding lens can be selected in the embodiment, and the operation of the camera can also refer to the conventional operation mode in the art.

[0061] ​In an embodiment, the plurality of shooting assemblies can include, in sequence along the rotation direction of the rotating table 1, a rear surface shooting assembly 3, an inner side surface shooting assembly 4, a lateral surface shooting assembly 7, an outer side surface shooting assembly 5, and a front surface shooting assembly 6, which are respectively located at five workstations and correspondingly detect, at the five workstations, the rear surface 21 of the multi-surface workpiece 2 in the rotation direction of the rotating table, the inner side surface 22 facing the center of the rotating table, the lateral surface 25, the outer side surface 23 facing away from the center of the rotating table, and the front surface 24 in the rotation direction. The above five shooting assemblies are only examples, and the present application can increase or decrease the shooting assemblies according to specific shooting requirements.

[0062] In addition, the embodiment also provides a method for detecting a multi-surface workpiece by using the above multi-surface workpiece detection device, which comprises the following steps:

[0063] Placing the multi-surface workpiece 2 on the rotating table 1 and rotating the rotating table 1 to make the multi-surface workpiece 2 pass through the plurality of shooting assemblies 3, 4, 5, 6 in sequence;

[0064] Whenever the multi-surface workpiece 2 passes through one shooting assembly, using the image capturing device of the one shooting assembly to capture the image of the corresponding one circumferential surface of the multi-surface workpiece 2; and

[0065] Simultaneously with the image capturing device capturing the image of the corresponding one circumferential surface, recording the first offset angle and the second offset angle.

[0066] Due to the existence of the above first offset angle and second offset angle, the size of the captured image of the surface is not necessarily equal to the actual size of the surface, so it is necessary to convert the image size into the actual size of the surface by calculation. For example, when the multi-surface workpiece 2 is a cuboid, the method further comprises the following steps:

[0067] The size of the corresponding one circumferential surface is calculated by the following formula:

[0068] Formula (1):

[0069] Wherein, E1 is the length of one side of the corresponding one circumferential surface, and e1 is the length of the image of the one side, and α1 is the first offset angle;

[0070] Formula (2):

[0071] Wherein, E2 is the length of another side adjacent to the one side of the corresponding one circumferential surface, and e2 is the length of the image of the another side, and α2 is the second offset angle.

[0072] Further, for the diagonal length D of the corresponding one circumferential surface, the following formula (3) can also be used to calculate:

[0073] Formula (3),

[0074] It should be noted that the existing detection device usually arranges the camera parallel to the rotating workbench, and in order to meet the shooting distance between the camera and the rotating workbench, the camera has to be arranged at a far distance outside the rotating workbench, which will cause the increase of the working space and the overall size of the entire detection device, which is not conducive to space saving. The present application reasonably sets the above offset angle, and changes the camera from a far distance outside the rotating workbench to a certain distance obliquely above (or obliquely below) the rotating workbench, which undoubtedly reduces the extension distance of the entire detection device in the horizontal direction, thereby reducing the overall size and greatly saving the space. In addition, the existing detection device shoots each camera directly against the surface of the workpiece, which inevitably brings background noise to the captured image. The present application can avoid background noise to a certain extent by setting the offset angle.

[0075] In summary, the workpiece multi-surface detection device of the embodiment enables the workpiece to continuously move in the rotating workbench, and can detect multiple surfaces of the workpiece at one time. As shown in the drawings, the workpiece multi-surface detection device of the embodiment can also detect multiple multi-surface workpieces in batches, greatly improving the detection efficiency. Moreover, the workpiece multi-surface detection device of the embodiment avoids the influence of illumination between different workstations, reduces background noise, and reduces the size of the entire detection device, saving the working space. Figure 1

[0076] Those skilled in the art can understand that the above-described embodiments are exemplary, and those skilled in the art can make improvements thereto, and the structures described in various embodiments can be freely combined without structural or principle conflicts.

[0077] Although the present application is described in conjunction with the drawings, the embodiments disclosed in the drawings are intended to exemplarily illustrate the embodiments of the present application, and cannot be understood as a limitation of the present application. The size ratio in the drawings is only illustrative, and cannot be understood as a limitation of the present application.

[0078] The above-described embodiments only exemplarily illustrate the principles and structures of the present application, and are not used to limit the present application. Those skilled in the art should understand that any changes and improvements made to the present application without deviating from the general concept of the present application are within the scope of the present application. The scope of protection of the present application should be limited by the scope defined in the claims of the present application.​

Claims

1. A multi-surface inspection device for workpieces, characterized in that, include: A rotating worktable (1) configured to carry a multi-surface workpiece (2) and, upon rotation, cause the multi-surface workpiece (2) to sequentially pass through multiple imaging components (3, 4, 5, 6); and The plurality of imaging components (3, 4, 5, 6) are sequentially arranged at different workstations along the rotation direction of the rotary table (1). Each imaging component includes a surface image capturing device (31, 41, 51, 61). Each surface image capturing device is configured to capture an image of a corresponding peripheral surface of the multi-surface workpiece (2) when the multi-surface workpiece (2) passes by the surface image capturing device, and is configured to form a first offset angle and a second offset angle with the corresponding peripheral surface when capturing the image of the corresponding peripheral surface. Wherein, the first offset angle refers to the angle formed by the orthographic projection of the optical axis of the surface image capturing device in a plane perpendicular to the rotation axis of the rotary table (1) and the normal direction of the corresponding peripheral surface, wherein the first offset angle is greater than or equal to 0 degrees and less than or equal to 30 degrees, and Wherein, the second offset angle refers to the angle formed by the orthographic projection of the optical axis of the surface image capturing device in a plane parallel to the rotation axis of the rotary stage (1) and perpendicular to the corresponding peripheral surface, and the normal direction of the corresponding peripheral surface. The second offset angle is greater than 0 degrees and less than or equal to 30 degrees. The surface image capturing device of the plurality of imaging components includes a camera positioned above the multi-surface workpiece in a direction perpendicular to the rotary table, so as to form a second offset angle with the corresponding peripheral surface when capturing an image of the corresponding peripheral surface.

2. The workpiece multi-surface inspection device according to claim 1, characterized in that, One of the multiple imaging components (3, 4, 5, 6) is a rear surface imaging component (3), and the image capturing device is a rear surface camera (31) of the rear surface imaging component (3). The rear surface camera (31) is located outside the rotary table (1) and is higher than the multi-surface workpiece (2) in a direction perpendicular to the rotary table (1). The peripheral surface includes the rear surface (21) of the multi-surface workpiece (2) in the rotation direction. The rear surface camera (31) is configured to capture an image of the rear surface (21) of the multi-surface workpiece (2) in the rotation direction as the multi-surface workpiece (2) passes by.

3. The multi-surface inspection device for workpieces according to claim 1, characterized in that, One of the multiple imaging components (3, 4, 5, 6) is an inner surface imaging component (4), and the image capturing device is an inner surface camera (41) of the inner surface imaging component (4). The inner surface camera (41) is located inside the rotary table (1) and is higher than the multi-surface workpiece (2) in a direction perpendicular to the rotary table (1). The peripheral surface includes the inner surface (22) of the multi-surface workpiece (2) facing the center of the rotary table (1). The inner surface camera (41) is configured to capture an image of the inner surface (22) of the multi-surface workpiece (2) facing the center of the rotary table (1) when the multi-surface workpiece (2) passes by.

4. The multi-surface inspection device for workpieces according to claim 1, characterized in that, One of the multiple imaging components (3, 4, 5, 6) is an outer surface imaging component (5), and the image capturing device is an outer surface camera (51) of the outer surface imaging component (5). The outer surface camera (51) is located outside the rotary table (1) and is higher than the multi-surface workpiece (2) in a direction perpendicular to the rotary table (1). The peripheral surface includes the outer surface (23) of the multi-surface workpiece (2) that is away from the center of the rotary table (1). The outer surface camera (51) is configured to capture an image of the outer surface (23) of the multi-surface workpiece (2) that is away from the center of the rotary table (1) when the multi-surface workpiece (2) passes by.

5. The workpiece multi-surface inspection device according to claim 1, characterized in that, One of the multiple imaging components (3, 4, 5, 6) is a front surface imaging component (6), and the image capturing device is a front surface camera (61) of the front surface imaging component (6). The front surface camera (61) is located outside the rotary table (1) and is higher than the multi-surface workpiece (2) in a direction perpendicular to the rotary table (1). The peripheral surface includes the front surface (24) of the multi-surface workpiece (2) in the rotation direction. The front surface camera (61) is configured to capture an image of the front surface (24) of the multi-surface workpiece (2) in the rotation direction as the multi-surface workpiece (2) passes by.

6. The workpiece multi-surface inspection device according to claim 1, characterized in that, The multi-surface inspection device for the workpiece further includes a transverse surface imaging component (7), which includes a transverse surface camera (71). The transverse surface camera (71) is located above or below the rotary table (1). The transverse surface camera (71) is configured to capture images of the transverse surface (25) of the multi-surface workpiece (2) as it passes by. The transverse surface is the surface of the multi-surface workpiece (2) facing or away from the rotary table. The transverse surface camera (71) is configured to form a third offset angle and a fourth offset angle with the transverse surface when capturing images of the transverse surface. Wherein, the third offset angle refers to the angle formed by the orthographic projection of the optical axis of the transverse surface camera onto the first reference plane and the normal direction of the transverse surface, wherein the first reference plane is parallel to the rotation axis of the rotary table (1) and perpendicular to the transverse surface (25); Wherein, the fourth offset angle refers to the angle formed by the orthographic projection of the optical axis of the transverse surface camera onto the second reference plane and the normal direction of the transverse surface. The second reference plane is parallel to the rotation axis of the rotary table (1) and perpendicular to the transverse surface (25). The first reference plane and the second reference plane are perpendicular to each other.

7. The multi-surface inspection device for workpieces according to claim 6, characterized in that, The third offset angle and the fourth offset angle are both greater than or equal to 0 degrees and less than or equal to 30 degrees.

8. The workpiece multi-surface inspection device according to any one of claims 1 to 5, characterized in that, Each of the shooting components also includes a light source (8) and a bracket (9), the light source (8) being used to provide illumination for the corresponding surface, and the light source (8) and the image capturing devices (31, 41, 51, 61) being mounted on the bracket (9).

9. The workpiece multi-surface inspection device according to claim 8, characterized in that, The supports for two adjacent shooting components are independent of each other or connected to each other.

10. The multi-surface inspection device for workpieces according to claim 1, characterized in that, The multiple shooting components (3, 4, 5, 6) are distributed within one half-rotation range of the rotary table (1).

11. A method for inspecting a multi-surface workpiece (2) using the multi-surface inspection device according to any one of claims 1 to 10, characterized in that, Includes the following steps: The multi-surface workpiece (2) is placed on the rotary table (1), and the rotary table (1) is rotated so that the multi-surface workpiece (2) passes through the multiple imaging components (3, 4, 5, 6) in sequence. Whenever the multi-surface workpiece (2) passes through a shooting component, the image capturing device of the shooting component captures an image of a corresponding peripheral surface of the multi-surface workpiece (2); as well as While the image capturing device captures an image of the corresponding peripheral surface, it records the first offset angle and the second offset angle.

12. The method according to claim 11, characterized in that, When the multi-surface workpiece (2) is a cuboid, the method further includes the following steps: The dimension of the corresponding circumferential surface is calculated using the following formula: Formula (1): E1= Where E1 is the length of one side of the corresponding peripheral surface, and The length of the image of the edge is α1, and the first offset angle is α1. Formula (2): E2 = Where E2 is the length of the other side of the corresponding circumferential surface adjacent to the first side, and α1 is the length of the image of the other side, and α2 is the second offset angle.

Images