Multi-angle light source lighting mechanism and composite lamination stacking machine
By designing a multi-angle light source light mechanism in the lamination machine, and using a three-dimensional driving component to realize multi-angle movement of the CCD camera and the ring light source, the problems of low degree of freedom of the light source and uneven light intensity in the prior art are solved, and the effects of uniform light intensity and convenient calibration are achieved.
Patent Information
- Application Number
- CN202421685784.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the panoramic CCD detection, the existing stacker has low degrees of freedom of light sources and photography, uneven light intensity, difficult calibration, and the multi-light source system is costly and complex in structure, making it difficult to meet the uniformity of different lighting conditions.
A multi-angle light source lighting mechanism is designed to connect the CCD camera and the ring light source through a three-dimensional driving component to move it in the X, Y, and Z axes, realize multi-angle light source lighting, and improve the freedom of light source and taking photos.
It achieves uniform light intensity and convenient calibration, improves photography effect, reduces cost and structural complexity, and is suitable for different lighting conditions.
Smart Images

Figure CN222992819U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, and in particular, to a multi-angle light source lighting mechanism and a composite laminator. Background Art
[0002] The technical background of the multi-angle light source lighting structure in panoramic CCD detection is mainly to ensure the integrity and accuracy of lamination, detect defects and abnormalities, detect the characteristics and quality of the tape in real time, and discover and adjust problems in a timely manner.
[0003] Currently, in the panoramic CCD detection of the tape by the laminator, the lighting structure usually adopts a fixed light source and an image acquisition device, which can only light and take pictures from a fixed angle, with uneven light intensity, difficult calibration, low degree of freedom, and affecting the photographing effect. Or, in the prior art, a multi-light source system is also adopted, using multiple light sources to light from multiple directions to ensure uniform illumination intensity and avoid uneven imaging brightness. However, this method will increase the cost and the complexity of the mechanism, and due to the inability to adjust, it is difficult to meet the lighting uniformity for different lighting conditions, and there is also the problem of difficult calibration. Summary of the Utility Model
[0004] The objectives of the present utility model include, for example, providing a multi-angle light source lighting mechanism and a composite laminator, which can improve the degree of freedom of the light source and photographing, ensure the photographing effect, and can ensure uniform light intensity, convenient calibration, simple structure and low cost.
[0005] Embodiments of the present utility model can be implemented as follows:
[0006] In a first aspect, the present utility model provides a multi-angle light source lighting mechanism, including:
[0007] A mounting plate;
[0008] A three-dimensional driving component, which is arranged on the mounting plate;
[0009] A CCD camera, which is connected to the three-dimensional driving component and moves along the X-axis, Y-axis and Z-axis directions under the drive of the three-dimensional driving component;
[0010] An annular light source, which is connected to the three-dimensional driving component and moves along the X-axis, Y-axis and Z-axis directions under the drive of the three-dimensional driving component;
[0011] Wherein, the CCD camera corresponds to the middle hollow area of the annular light source, and the CCD camera and the annular light source can move synchronously under the drive of the three-dimensional driving component.
[0012] In an alternative embodiment, the three-dimensional driving assembly includes a first slide rail, a first slider, a second slide rail, a second slider, a support frame, and an adjustment block. The first slide rail is arranged on the mounting plate along the X-axis direction. The second slide rail is vertically mounted on the first slider along the Y-axis direction and is configured to move along the X-axis direction driven by the first slider. The first slider is slidably arranged on the first slide rail, and the second slider is slidably arranged on the second slide rail. The support frame is connected to the second slider and is configured to move along the Y-axis direction driven by the second slider. The adjustment block is movably arranged on the support frame and can move relative to the support frame along the Z-axis direction. The CCD camera and the annular light source are connected to the adjustment block.
[0013] In an alternative embodiment, a waist-shaped hole is formed in the support frame. The long axis direction of the waist-shaped hole is along the Z-axis direction. A connecting member is arranged on the adjustment block. The connecting member is detachably connected to the waist-shaped hole and can adjust the position of the adjustment block along the waist-shaped hole.
[0014] In an alternative embodiment, a connecting cylinder frame is further arranged on the adjustment block. The connecting cylinder frame extends along the Z-axis direction and is connected to the edge of the annular light source. The CCD camera is arranged in the connecting cylinder frame, and the lens of the CCD camera faces the opening area of the annular light source.
[0015] In an alternative embodiment, there are two of the first slider, the second slide rail, the second slider, the support frame, and the adjustment block. The two first sliders are spaced apart on the first slide rail. The two second slide rails are vertically mounted on the two first sliders along the Y-axis direction. The two second sliders are respectively slidably arranged on the two second slide rails. The two support frames are respectively connected to the two second sliders. The two adjustment blocks are respectively movably arranged on the two support frames. The CCD camera and the annular light source are connected to each adjustment block.
[0016] In an alternative embodiment, a pole piece passage for the pole piece to pass through is further arranged on the bottom side of the mounting plate. The annular light source and the CCD camera are both arranged on the upper side of the pole piece passage. The annular light source is configured to illuminate the upper surface of the pole piece.
[0017] In an alternative embodiment, the multi-angle light source illumination mechanism further includes a backlight. The backlight is arranged on the lower side of the pole piece passage and is configured to illuminate the lower surface of the pole piece.
[0018] In an alternative embodiment, a horizontally extending mounting plate and a sliding rod are further provided on the mounting plate. The mounting plate is vertically disposed on the mounting plate and extends along the X-axis direction. The sliding rod is movably disposed on the mounting plate and extends along the Y-axis direction, and is located below the pole piece channel for being spaced apart from the pole piece. The backlight source is detachably mounted on the sliding rod.
[0019] In an alternative embodiment, a plurality of mounting holes are formed in the mounting plate, and the plurality of mounting holes are distributed along the X-axis direction. One end of the sliding rod is detachably mounted in one of the mounting holes.
[0020] In a second aspect, the present invention provides a composite laminator, including a laminating mechanism and the multi-angle light source lighting mechanism according to any one of the foregoing embodiments. The laminating mechanism is disposed on the mounting plate for conveying and stacking pole pieces. The CCD camera and the annular light source are disposed above the pole pieces.
[0021] The beneficial effects of the embodiments of the present invention include, for example:
[0022] The multi-angle light source lighting mechanism and the composite laminator provided by the embodiments of the present invention are provided with a three-dimensional driving assembly on the mounting plate, and at the same time, both the CCD camera and the annular light source are connected to the three-dimensional driving assembly, so as to move along the X-axis, Y-axis and Z-axis directions under the drive of the three-dimensional driving assembly. Among them, the CCD camera corresponds to the hollow area in the middle of the annular light source, so as to facilitate its photographing and framing. Compared with the prior art, the present invention realizes the synchronous movement of the camera and the light source through the three-dimensional driving assembly, and can further adjust the angle and position of the light source to achieve multi-angle light source lighting, and can improve the freedom of the light source and photographing, ensure the photographing effect, and ensure uniform light intensity and convenient calibration through angle adjustment, and there is no need for a complex multi-light source support structure, with a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0024] Figure 1 It is a schematic structural diagram of the multi-angle light source lighting mechanism provided by the embodiment of the present invention from the first perspective;
[0025] Figure 2 It is a schematic structural diagram of the multi-angle light source lighting mechanism provided by the embodiment of the present invention from the second perspective;
[0026] Figure 3 is Figure 2 a schematic diagram of the connection structure of the three-dimensional drive assembly in
[0027] Icon: 100 - multi-angle light source lighting mechanism; 110 - mounting plate; 111 - pole piece channel; 130 - three-dimensional drive assembly; 131 - first slide rail; 132 - first slider; 133 - second slide rail; 134 - second slider; 135 - support frame; 136 - adjustment block; 137 - waist-shaped hole; 138 - connecting cylinder frame; 150 - CCD camera; 170 - annular light source; 190 - backlight; 191 - mounting plate; 193 - mounting hole; 195 - slide bar. Specific embodiments
[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0029] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.
[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0031] In the description of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed when in use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.
[0032] In addition, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.
[0033] It should be noted that, without conflict, the features in the embodiments of the present utility model can be combined with each other.
[0034] Please refer to Figures 1 to 3 , the embodiment of the present utility model provides a multi-angle light source lighting mechanism 100, which can improve the freedom of the light source and photography, ensure the photography effect, and can ensure uniform light intensity, convenient calibration, simple structure and low cost.
[0035] The multi-angle light source lighting mechanism 100 provided by the embodiment of the present utility model includes a mounting plate 110, a three-dimensional driving component 130, a CCD camera 150 and an annular light source 170. The mounting plate 110 is used for mounting on an external frame to achieve overall support. The three-dimensional driving component 130 is arranged on the mounting plate 110. The CCD camera 150 is connected to the three-dimensional driving component 130 and moves along the X-axis, Y-axis and Z-axis directions under the drive of the three-dimensional driving component 130; the annular light source 170 is connected to the three-dimensional driving component 130 and moves along the X-axis, Y-axis and Z-axis directions under the drive of the three-dimensional driving component 130; wherein, the CCD camera 150 corresponds to the middle hollow area of the annular light source 170, and the CCD camera 150 and the annular light source 170 can move synchronously under the drive of the three-dimensional driving component 130.
[0036] It should be noted that in this embodiment, the three-dimensional driving component 130 is arranged on the mounting plate 110, and at the same time, both the CCD camera 150 and the annular light source 170 are connected to the three-dimensional driving component 130, so as to move along the X-axis, Y-axis and Z-axis directions under the drive of the three-dimensional driving component 130. Among them, the CCD camera 150 corresponds to the middle hollow area of the annular light source 170, so as to facilitate its photography and framing. In this embodiment, the synchronous movement of the camera and the light source is realized through the three-dimensional driving component 130, and then the angle and position of the light source can be adjusted to realize multi-angle light source lighting, and the freedom of the light source and photography can be improved, the photography effect can be ensured, and the light intensity can be ensured to be uniform and the calibration is convenient through angle adjustment. Moreover, there is no need for a complex multi-light source support structure, and the structure is simple and the cost is low.
[0037] The three-dimensional driving assembly 130 includes a first slide rail 131, a first slider 132, a second slide rail 133, a second slider 134, a support frame 135, and an adjustment block 136. The first slide rail 131 is arranged on the mounting plate 110 along the X-axis direction. The second slide rail 133 is vertically mounted on the first slider 132 along the Y-axis direction and is used to move along the X-axis direction driven by the first slider 132. The first slider 132 is slidably arranged on the first slide rail 131, and the second slider 134 is slidably arranged on the second slide rail 133. The support frame 135 is connected to the second slider 134 and is used to move along the Y-axis direction driven by the second slider 134. The adjustment block 136 is movably arranged on the support frame 135 and can move relative to the support frame 135 along the Z-axis direction. The CCD camera 150 and the annular light source 170 are connected to the adjustment block 136.
[0038] It should be noted that in this embodiment, the X-axis direction is the horizontal left-right direction as shown in the figure, the Y-axis direction is the direction perpendicular to the plane of the figure, and the Z-axis is the vertical up-down direction as shown in the figure. In this embodiment, the first slide rail 131 is arranged horizontally on the mounting plate 110. At the same time, the second slide rail 133 is along the Y-axis step, and the adjustment block 136 is movably arranged on the support frame 135 and can be adjusted along the Z-axis direction. Therefore, the CCD camera 150 and the annular light source 170 on the adjustment block 136 can synchronously achieve adjustment in the X-axis, Y-axis, or Z-axis direction, and further achieve multi-angle adjustment of the CCD camera 150 and the annular light source 170, realizing multi-angle light projection.
[0039] It should be noted that the basic structure and photographing principle of the CCD camera 150 in this embodiment are the same as those of a conventional CCD. Its viewfinder corresponds to the middle position of the annular light source 170, facilitating framing. Of course, this is only one framing method. In other preferred embodiments of the present utility model, the annular light source 170 can also be arranged offset from the CCD camera 150, and its specific arrangement method is not specifically limited herein.
[0040] In this embodiment, a waist-shaped hole 137 is formed on the support frame 135. The long axis direction of the waist-shaped hole 137 is along the Z-axis direction. A connecting member is provided on the adjustment block 136. The connecting member is detachably connected to the waist-shaped hole 137 and can adjust the position of the adjustment block 136 along the waist-shaped hole 137. Specifically, the connecting member can be a connecting bolt. Through the cooperation of the connecting bolt and the nut, the adjustment block 136 can be fixed on the waist-shaped hole 137. When adjustment is required, the nut can be turned, and after adjusting the position of the adjustment block 136, it can be tightened to achieve adjustment in the Z-axis direction.
[0041] It should be noted that in this embodiment, the first slider 132 and the first slide rail 131 can slide with damping, and the second slider 134 and the second slide rail 133 can also slide with damping. In the absence of external force, the first slider 132 can be positioned on the first slide rail 131, and the second slider 134 can be positioned on the second slide rail 133. When the position needs to be adjusted, the first slider 132 or the second slider 134 can be manually toggled to achieve the position adjustment of the first slider 132 or the second slider 134.
[0042] Furthermore, a connecting cylinder frame 138 is also provided on the adjusting block 136. The connecting cylinder frame 138 extends along the Z-axis direction and is connected to the edge of the annular light source 170. The CCD camera 150 is arranged inside the connecting cylinder frame 138, and the lens of the CCD camera 150 faces the opening area of the annular light source 170. Specifically, the connecting cylinder frame 138 can be composed of multiple vertical rods. By arranging the connecting cylinder frame 138, it can be ensured that the installation of the CCD camera 150 does not affect the normal light projection of the annular light source 170, and it can ensure that the CCD camera 150 can view downward from the center of the annular light source 170.
[0043] In this embodiment, there are two first sliders 132, two second slide rails 133, two second sliders 134, two support frames 135, and two adjusting blocks 136. The two first sliders 132 are arranged at intervals on the first slide rail 131. The two second slide rails 133 are vertically installed on the two first sliders 132 along the Y-axis direction. The two second sliders 134 are respectively slidably arranged on the two second slide rails 133. The two support frames 135 are respectively connected to the two second sliders 134. The two adjusting blocks 136 are respectively movably arranged on the two support frames 135. Each adjusting block 136 is connected with a CCD camera 150 and an annular light source 170. Specifically, by using two CCD cameras 150 and annular light sources 170, front and rear view-taking can be realized, resulting in a better view-taking effect and more accurate testing.
[0044] In this embodiment, a pole piece channel 111 for the pole piece to pass through is further provided on the bottom side of the mounting plate 110. The annular light source 170 and the CCD camera 150 are both arranged on the upper side of the pole piece channel 111. The annular light source 170 is used to project light onto the upper surface of the pole piece. Specifically, the annular light source 170 projects light onto the upper surface of the pole piece, and the CCD camera 150 views the light-projected area, ensuring uniform illumination in the view-taking area.
[0045] Furthermore, the multi-angle light source lighting mechanism 100 further includes a backlight 190. The backlight 190 is arranged on the lower side of the pole piece channel 111 and is used to project light onto the lower surface of the pole piece. Specifically, by arranging the backlight 190, light can be projected from the lower surface of the pole piece, enabling the CCD camera 150 to more accurately collect the image information of the pole piece when taking pictures, which helps to detect pole piece defects in a timely manner.
[0046] In this embodiment, a horizontally extending mounting plate 191 and a sliding rod 195 are further provided on the mounting plate 110. The mounting plate 191 is vertically arranged on the mounting plate 110 and extends along the X-axis direction. The sliding rod 195 is movably arranged on the mounting plate 191 and extends along the Y-axis direction, and is located below the pole piece channel for being arranged at intervals with the pole piece. The backlight source is detachably mounted on the sliding rod 195. Specifically, there may be two mounting plates 191 and also two sliding rods 195. Two backlight sources 190 may be arranged on each sliding rod 195, and both ends of each sliding rod 195 are movably arranged on the two mounting plates 191 respectively.
[0047] Furthermore, a plurality of mounting holes 193 are formed in the mounting plate 191. The plurality of mounting holes 193 are distributed along the X-axis direction. One end of the sliding rod 195 is detachably mounted in one of the mounting holes 193.
[0048] In this embodiment, a plurality of mounting holes 193 are formed in the mounting plate 191. The plurality of mounting holes 193 are arranged in an array. The backlight source 190 is detachably mounted in one of the mounting holes 193. Specifically, there may be a plurality of backlight sources 190. The positions of the plurality of backlight sources 190 are adjustable. When the position of the upper annular light source 170 is adjusted, the backlight source 190 can also be adjusted in position among the plurality of mounting holes 193 to ensure as much as possible that the annular light source 170 and the backlight source 190 exactly correspond to better realize lighting of the pole piece.
[0049] On the other hand, the embodiment of the present utility model further provides a composite laminator, including a laminating mechanism and the foregoing multi-angle light source lighting mechanism 100. The multi-angle light source lighting mechanism 100 includes a mounting plate 110, a three-dimensional driving assembly 130, and a CCD camera 150. The mounting plate 110 is used for being mounted on an external frame to achieve overall support. The three-dimensional driving assembly 130 is arranged on the mounting plate 110. The CCD camera 150 is connected to the three-dimensional driving assembly 130 and moves along the X-axis, Y-axis, and Z-axis directions under the drive of the three-dimensional driving assembly 130. The annular light source 170 is connected to the three-dimensional driving assembly 130 and moves along the X-axis, Y-axis, and Z-axis directions under the drive of the three-dimensional driving assembly 130. Among them, the CCD camera 150 corresponds to the middle hollow area of the annular light source 170, and the CCD camera 150 and the annular light source 170 can move synchronously under the drive of the three-dimensional driving assembly 130. The laminating mechanism is arranged on the mounting plate 110 for conveying and stacking pole pieces. The CCD camera 150 and the annular light source 170 are arranged above the pole pieces.
[0050] In summary, the multi-angle light source lighting mechanism 100 and the composite laminating machine provided in this embodiment are provided with a three-dimensional driving assembly 130 on the mounting plate 110, and the CCD camera 150 and the ring light source 170 are connected to the three-dimensional driving assembly 130, so that they move along the X-axis, Y-axis and Z-axis directions under the drive of the three-dimensional driving assembly 130, wherein the CCD camera 150 corresponds to the middle hollow area of the ring light source 170, so that it can be convenient for it to take pictures and frame. Compared with the prior art, the utility model realizes the synchronous movement of the camera and the light source through the three-dimensional driving assembly 130, and then can adjust the angle and position of the light source, realize multi-angle light source lighting, and can improve the degree of freedom of the light source and photography, ensure the photography effect, and can ensure uniform light intensity and convenient calibration through angle adjustment, and does not require a complex multi-light source support structure, and has a simple structure and low cost.
[0051] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A multi-angle light source lighting mechanism, characterized in that: include: Mounting plate; A three-dimensional driving assembly, wherein the three-dimensional driving assembly is arranged on the mounting plate; A CCD camera, wherein the CCD camera is connected to the three-dimensional driving component and moves along the X-axis, Y-axis and Z-axis directions under the drive of the three-dimensional driving component; an annular light source, the annular light source is connected to the three-dimensional driving component and moves along the X-axis, Y-axis and Z-axis directions under the drive of the three-dimensional driving component; The CCD camera corresponds to the central hollow area of the annular light source, and the CCD camera and the annular light source can move synchronously under the drive of the three-dimensional driving component.
2. The multi-angle light source lighting mechanism according to claim 1, characterized in that: The three-dimensional driving component includes a first slide rail, a first slider, a second slide rail, a second slider, a support frame and an adjustment block. The first slide rail is arranged on the mounting plate along the X-axis direction, and the second slide rail is vertically installed on the first slider along the Y-axis direction for moving along the X-axis direction driven by the first slider. The first slider is slidably arranged on the first slide rail, and the second slider is slidably arranged on the second slide rail. The support frame is connected to the second slider for moving along the Y-axis direction driven by the second slider. The adjustment block is movably arranged on the support frame and can move relative to the support frame along the Z-axis direction. The CCD camera and the annular light source are connected to the adjustment block.
3. The multi-angle light source lighting mechanism according to claim 2, characterized in that: The support frame is provided with a waist-shaped hole, the long axis direction of the waist-shaped hole is along the Z-axis direction, and the adjustment block is provided with a connecting piece, which is detachably connected to the waist-shaped hole and can adjust the position of the adjustment block along the waist-shaped hole.
4. The multi-angle light source lighting mechanism according to claim 2, characterized in that: The adjusting block is also provided with a connecting tube frame, which extends along the Z-axis direction and is connected to the edge of the annular light source. The CCD camera is arranged in the connecting tube frame, and the lens of the CCD camera faces the opening area of the annular light source.
5. The multi-angle light source lighting mechanism according to claim 2, characterized in that: There are two of the first slider, the second slide rail, the second slider, the support frame and the adjustment block. The two first sliders are arranged on the first slide rail at an interval. The two second slide rails are vertically installed on the two first sliders along the Y-axis direction. The two second sliders are respectively slidably arranged on the two second slide rails. The two support frames are respectively connected to the two second sliders. The two adjustment blocks are respectively movably arranged on the two support frames. Each of the adjustment blocks is connected to the CCD camera and the annular light source.
6. The multi-angle light source lighting mechanism according to claim 1, characterized in that: The bottom side of the mounting plate is also provided with a pole piece channel for the pole piece to pass through. The annular light source and the CCD camera are both arranged on the upper side of the pole piece channel. The annular light source is used to illuminate the upper surface of the pole piece.
7. The multi-angle light source lighting mechanism according to claim 6, characterized in that: The multi-angle light source lighting mechanism also includes a backlight source, which is arranged on the lower side of the pole piece channel and is used to illuminate the lower surface of the pole piece.
8. The multi-angle light source lighting mechanism according to claim 7, characterized in that: A horizontally extending mounting plate and a slide bar are also provided on the mounting plate. The mounting plate is vertically arranged on the mounting plate and extends along the X-axis direction. The slide bar is movably arranged on the mounting plate and extends along the Y-axis direction. It is located at the lower side of the pole piece channel and is used to be spaced apart from the pole piece. The backlight source is detachably mounted on the mounting plate slide bar.
9. The multi-angle light source lighting mechanism according to claim 8, characterized in that: The mounting plate is provided with a plurality of mounting holes, which are distributed along the X-axis direction, and one end of the sliding rod is detachably mounted on one of the mounting holes.
10. A composite lamination machine, characterized in that: It comprises a stacking mechanism and a multi-angle light source lighting mechanism as described in any one of claims 1 to 9, wherein the stacking mechanism is arranged on the mounting plate for conveying and stacking pole pieces, and the CCD camera and the annular light source are arranged above the pole pieces.