Calibration device, calibration system and conveying equipment
By using a combination of center circle and concentric sector calibration diagrams and encoders in battery production equipment, the problem of low calibration accuracy of vision components was solved, and high-precision vision component calibration and self-testing functions were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-04-03
AI Technical Summary
In battery production equipment, the calibration process of vision components requires high precision in the application of checkerboard patterns, and positional deviations can lead to low calibration accuracy.
A high-precision calibration is achieved by setting a central circle and multiple concentric, gradually increasing sector calibration patterns on the surface of the first roller, combined with a vision component and an encoder, and by comparing the image spacing.
The calibration accuracy of the vision components has been improved, the bonding accuracy requirements have been reduced, and the reliability of the calibration process has been ensured through a self-test function.
Smart Images
Figure CN224080921U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of visual correction technology, and in particular relates to a calibration device, calibration system and conveying equipment. Background Technology
[0002] In current battery production equipment, whether it is coating, rolling, die-cutting or winding, there are all scenarios that require measurement by vision components. Before and during operation, the accuracy of vision components needs to be tested and calibrated.
[0003] Currently, when calibrating the vision component, a checkerboard pattern needs to be pasted onto the imaging roller. However, pasting the checkerboard pattern requires a high level of skill from the operator. Furthermore, fine-tuning requires multiple adjustments to the position of the pasted checkerboard pattern and the camera mounting position, which is quite difficult. If the pasting position is off, it will result in lower calibration accuracy of the vision component. Utility Model Content
[0004] The purpose of this application is to provide a calibration device, a calibration system, and a conveying device.
[0005] According to a first aspect of the embodiments of this application, a calibration apparatus is provided, comprising:
[0006] A calibration component, comprising a first roller and a calibration diagram, wherein the calibration diagram is disposed on a portion of the surface of the first roller, the calibration diagram comprising a central circle and a plurality of sectors with gradually increasing diameters, the plurality of sectors being distributed on both sides of the central circle, the diameter direction of the central circle and the sectors being the same as the axial direction of the first roller, and the central circle and the sectors being concentrically arranged;
[0007] A vision component is disposed on one side of the first roller, and the first roller is located within the shooting range of the vision component.
[0008] Optionally, the diameter of the largest fan is greater than or equal to the axial length of the first roller, the diameter of the largest fan is greater than the diameter of the first roller, and the diameter of the central circle is smaller than the diameter of the first roller.
[0009] Optionally, the diameter difference between two adjacent sectors is the same.
[0010] Optionally, the calibration pattern is applied to the surface of the first roller by spraying.
[0011] According to a second aspect of the embodiments of this application, a calibration system is provided, comprising:
[0012] The aforementioned calibration device;
[0013] The drive mechanism includes a first drive component and a first encoder, wherein the first encoder is used to collect the rotational speed signal of the first roller, and the first roller is located at the output end of the first drive component;
[0014] The industrial control computer, the first drive component is communicatively connected to the industrial control computer, the first encoder is communicatively connected to the industrial control computer, and the vision component is communicatively connected to the industrial control computer.
[0015] Optionally, the vision component is communicatively connected to the first encoder.
[0016] Optionally, the calibration system further includes a light source assembly, which is communicatively connected to the industrial control computer.
[0017] According to a third aspect of the embodiments of this application, a conveying device is provided, comprising:
[0018] The aforementioned calibration system;
[0019] The first roller mechanism is arranged at an interval from the calibration device.
[0020] Optionally, the first roller mechanism includes a second drive assembly and a second roller, wherein the second roller is disposed at the output end of the second drive assembly;
[0021] The second drive component is communicatively connected to the industrial control computer, and the second roller forms an electronic cam with the first roller through the first encoder.
[0022] Optionally, the conveying device further includes a second roller mechanism, and the calibration device is disposed between the second roller mechanism and the first roller mechanism.
[0023] One technical advantage of this application embodiment is that by setting a center and multiple fan-shaped areas on the surface of the first roller, the image captured by the vision component includes both the spacing between two adjacent fan-shaped areas and the spacing between two fan-shaped areas formed by the same concentric circle. Through the combined effect of these two spacings, the calibration accuracy of the vision component can be improved.
[0024] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.
[0026] Figure 1 This is a schematic diagram of the calibration component in the embodiments of this application;
[0027] Figure 2 This is a schematic diagram of multiple concentric circles and a central circle in an embodiment of this application;
[0028] Figure 3 Images captured by the visual component in the embodiments of this application;
[0029] Figure 4 This is a schematic diagram of the conveying equipment in the embodiments of this application.
[0030] Explanation of reference numerals in the attached figures:
[0031] Calibration device 1; Calibration component 11; First roller 111; Calibration diagram 112; Concentric circle 1121; Center circle 1122; Sector 1123; Vision component 12;
[0032] Light source component 2;
[0033] First roller mechanism 3;
[0034] Second roller mechanism 4;
[0035] Transition roller 5;
[0036] 6. Foil material. Detailed Implementation
[0037] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present application.
[0038] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.
[0039] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.
[0040] In all the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.
[0041] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.
[0042] like Figures 1-4As shown, according to a first aspect of the embodiments of this application, a calibration device 1 is provided, including a calibration component 11 and a vision component 12. The calibration component 11 includes a first roller 111 and a calibration map 112. The calibration map 112 is disposed on a portion of the surface of the first roller 111. The calibration map 112 includes a central circle 1122 and a plurality of sectors 1123 with gradually increasing diameters. The plurality of sectors 1123 are distributed on both sides of the central circle 1122. The diameter direction of the central circle 1122 and the sector 1123 is the same as the axial direction of the first roller 111. The central circle 1122 and the sector 1123 are concentrically arranged. The vision component 12 is disposed on one side of the first roller 111, and the first roller 111 is located within the shooting range of the vision component 12.
[0043] like Figure 1 , Figure 2 and Figure 4 As shown, the calibration device 1 includes a calibration component 11 and a vision component 12. The calibration component 11 includes a first roller 111 and a calibration map 112. The first roller 111 can be used to convey the foil 6. The calibration map 112 is located on a portion of the surface of the first roller 111, meaning that the complete calibration map 112 can only be seen at a preset angle of the first roller 111. The calibration map 112 includes a central circle 1122 and multiple sectors 1123. When the first roller 111 rotates to the preset angle, the central circle 1122 can be fully seen. The multiple sectors 1123 are cut by multiple concentric circles 1121. The diameter of the multiple fan-shaped sections 1123 gradually increases, and the multiple fan-shaped sections 1123 are distributed on both sides of the central circle 1122. The multiple fan-shaped sections 1123 are spaced apart along the axial direction of the first roller 111. That is to say, when the first roller 111 rotates to a preset angle, the multiple fan-shaped sections 1123 located on both sides of the central circle 1122 can be seen, and there is a certain distance between two adjacent fan-shaped sections 1123. The vision component 12 is set on one side of the first roller 111. The vision component 12 has a certain shooting range, and the first roller 111 can be fully or partially located within the shooting range of the vision component 12.
[0044] During the calibration of the vision component 12, the first roller 111 rotates around its own axis, and the vision component 12 captures a calibration image 112 of the first roller 111. If the image captured by the vision component 12 shows uniformly distributed stripes covering the field of view (see attached diagram), the calibration will be performed. Figure 2 If the image captured by the vision component 12 is an unevenly distributed stripe, or if some fan-shaped areas 1123 are not captured, it means that the vision component 12 and the first roller 111 are not in a parallel state, and the vision component 12 needs to be adjusted.
[0045] The calibration device 1 of this application sets a calibration pattern 112 on the surface of the first roller 111. The calibration pattern 112 includes a central circle 1122 and multiple sectors 1123. In the image captured by the vision component 12, there is both the distance between two adjacent sectors 1123 and the distance between two sectors 1123 formed by the same concentric circle 1121. The combined effect of these two distances can improve the calibration accuracy of the vision component 12. If an adhesive method is used, the combined effect of these two distances can ensure the calibration accuracy of the vision component 12, thereby relatively reducing the adhesive accuracy of the calibration pattern 112.
[0046] The vision component 12 includes a line scan camera. The principle of the line scan camera is that it only captures one line at a time (the line width is usually 1 pixel). As the first roller 111 rotates, the line scan camera continuously captures lines. Countless lines converge to form a surface. When the first roller 111 rotates one revolution, the calibration image 112 is completely captured.
[0047] In one alternative embodiment, the diameter of the largest sector 1123 is greater than or equal to the axial length of the first roller 111, the diameter of the largest sector 1123 is greater than the diameter of the first roller 111, and the diameter of the central circle 1122 is smaller than the diameter of the first roller 111.
[0048] Among the multiple sectors 1123, the largest sector 1123 refers to the sector with the largest diameter among all sectors 1123; and the central circle 1122 is the smallest circle.
[0049] To further explain, the diameter of the center circle 1122 is smaller than the diameter of the first roller 111. In other words, when the first roller 111 rotates to the preset angle, the center circle 1122 can be seen completely. Therefore, the center circle 1122 is used as the reference when calibrating.
[0050] To further explain, the diameter of the largest sector 1123 is greater than or equal to the axial length of the first roller 111, and is also greater than the diameter of the first roller 111. In other words, the calibration pattern 112 can cover the axial length of the first roller 111. During the foil production process, the vision component 12 can still observe the calibration pattern 112 on the first roller 111. During the production process, the distance between the arcs in the image captured by the vision component 12 can also be measured. By comparing the arc distance with the authentication distance, it is possible to detect whether the vision component 12 has any abnormalities in a timely manner, so as to make timely adjustments and improve the detection accuracy of the vision component 12.
[0051] The authentication spacing is the distance between two adjacent sectors 1123 in the calibration diagram 112.
[0052] In one optional embodiment, the diameter difference between two adjacent sectors 1123 is the same; this can be understood as the spacing between two adjacent sectors 1123 being the same. If the vision component 12 is parallel to the first roller 111, the spacing between two adjacent sectors 1123 in the calibration map 112 in the image captured by the vision component 12 is also the same. In this embodiment, the diameter difference between two adjacent sectors 1123 is the same, which makes it easier to compare the distance between two adjacent sectors 1123 in the captured image with the authentication distance when measuring the distance, thereby improving calibration efficiency.
[0053] In an alternative embodiment, the calibration pattern 112 is applied to the surface of the first roller 111 by spraying.
[0054] Compared to the pasting method, the spraying method can maintain a high-precision pattern on the surface of the first roller 111, which can improve calibration accuracy and operational reliability. Furthermore, after calibration is completed, the calibration pattern 112 does not need to be removed, so that the vision component 12 can still perform self-inspection through the calibration pattern 112 during the production process.
[0055] Furthermore, the calibration pattern 112 after spraying is subject to third-party certification to obtain the uncertainty of the pattern accuracy, so as to quantify the accuracy of the calibration pattern 112 and improve the reliability of the measurement results.
[0056] According to a second aspect of the embodiments of this application, a calibration system is provided, including a calibration device 1, a drive mechanism, and an industrial control computer; the drive mechanism includes a first drive component and a first encoder, the first encoder being used to collect the rotational speed signal of the first roller 111, the first roller 111 being disposed at the output end of the first drive component; the first drive component is communicatively connected to the industrial control computer, the first encoder is communicatively connected to the industrial control computer, and the vision component 12 is communicatively connected to the industrial control computer.
[0057] Further explanation: The calibration system includes a calibration device 1, a drive mechanism, and an industrial control computer. The drive mechanism includes a first drive component and a first encoder. A first roller 111 is disposed at the output end of the first drive component, which drives the first roller 111 to rotate around its own axis. The first encoder can be disposed on the first roller 111 or on the rotating shaft of the first drive component. Therefore, the first encoder can directly acquire the rotational speed signal of the first roller 111, or indirectly acquire the rotational speed signal of the first roller 111 by acquiring the rotational speed signal of the first drive component's shaft. The first encoder is communicatively connected to the industrial control computer, and the vision component 12 is also communicatively connected to the industrial control computer. The vision component 12 is controlled by the first drive component. The industrial control computer can acquire images captured by the vision component 12 and adjust the position of the vision component 12 by comparing the arc spacing of the captured images with the authentication spacing. In this embodiment, the accuracy of the vision component 12 in capturing the calibration map 112 during its movement is improved, thereby enhancing the calibration accuracy of the vision component 12.
[0058] The first encoder is a device that encodes and converts signals or data into a signal form that can be used for communication, transmission, and storage. In this embodiment, the first encoder converts angular displacement into a periodic electrical signal, and then converts this electrical signal into a pulse equivalent. The pulse equivalent represents the magnitude of the displacement. Every time the first roller rotates by a preset angle, the first encoder emits a pulse signal, thereby triggering the vision component 12 to take a picture once.
[0059] The first drive component can be a servo drive motor or a regular motor, preferably a servo drive motor.
[0060] In one embodiment, the vision component 12 is communicatively connected to the first encoder. When the first drive component drives the first roller 111 to rotate, and the first roller 111 rotates by a certain angle, the first encoder can transmit a pulse signal to the vision component 12, which then performs an image capture. That is, the number of rows in the image captured by the vision component 12 is triggered by the signal from the first encoder. Figure 3 As shown, the resolution of the captured image in the Y direction is equivalent to the pulse equivalent, and the captured image in the X direction shows a uniform fan-shaped pattern 1123. Since the calibration diagram 112 itself has been certified and has reliable accuracy, the interval in the X direction of the captured image can be calibrated to obtain the resolution at different positions.
[0061] In one alternative implementation, such as Figure 1As shown, the calibration system also includes a light source component 2, which is communicatively connected to the industrial control computer. The industrial control computer can control the brightness, illumination time, etc. of the light source component 2. The light source component 2 can provide uniform and stable illumination. When the vision component 12 acquires images, it needs to ensure the uniformity and stability of the illumination in order to improve the quality of the images captured by the vision component 12.
[0062] According to a third aspect of the embodiments of this application, a conveying device is provided, including a calibration system and a first roller mechanism 3; the first roller mechanism 3 is disposed at an interval from the calibration device 1.
[0063] like Figure 1 As shown, the conveying equipment includes a calibration system and a first roller mechanism 3, wherein the first roller mechanism 3 is spaced apart from the calibration device 1 of the calibration system. The first roller mechanism 3 is used to convey the foil 6 to the first roller 111 of the calibration component 11 of the calibration device 1. The first roller mechanism 3 and the first roller 111 can work together to convey the foil 6.
[0064] In one alternative embodiment, the first roller mechanism 3 includes a second drive assembly and a second roller, the second roller being disposed at the output end of the second drive assembly; the second drive assembly is communicatively connected to the industrial control computer, and the second roller forms an electronic cam with the first roller 111 through the first encoder.
[0065] Further explanation: The first roller mechanism 3 includes a second drive assembly and a second roller. The second roller is located at the drive end of the second drive assembly, which can drive the second roller to rotate around its own axis. The second drive assembly is communicatively connected to the industrial control computer. When the vision assembly 12 is calibrated, the industrial control computer starts acquiring images and simultaneously sends a signal to the second drive assembly to control the rotation of the second roller, and also sends a signal to the first drive assembly to control the rotation of the first roller 111. This enables an electronic cam to be formed between the first roller 111 and the second roller. That is, the movement of the first roller 111 and the second roller simulates the function of a mechanical cam according to the cam curve. The first encoder on the first roller 111 outputs a pulse signal to the vision assembly 12 to ensure that the pulse signal captured by the vision assembly 12 remains synchronized when the first roller 111 rotates, thereby improving the capturing accuracy of the vision assembly 12 and thus improving the calibration accuracy.
[0066] Furthermore, the first encoder enables the first roller 111 and the second roller to form an electronic cam, thereby avoiding the distortion of the image captured by the vision component 12 due to slippage between the foil 6 and the first roller 111 caused by insufficient friction to accelerate the first roller 111, thus further improving the calibration accuracy.
[0067] The second drive component can be a servo drive motor or a regular motor, preferably a servo drive motor.
[0068] In one alternative implementation, such as Figure 1 As shown, the conveying equipment further includes a second roller mechanism 4, and the calibration device 1 is disposed between the second roller mechanism 4 and the first roller mechanism 3; as Figure 1 As shown, the second roller mechanism 4 is spaced apart from the first roller mechanism 3, and the calibration device 1 is located between the first roller mechanism 3 and the second roller mechanism 4. The first roller mechanism 3 is an unwinding mechanism, and the second roller mechanism 4 is a winding mechanism.
[0069] In a preferred embodiment, such as Figure 1 As shown, at least one transition roller 5 is provided between the first roller mechanism 3 and the second roller mechanism 4. During the conveying process of the foil 6, the transition roller 5 can support and / or steer the foil 6.
[0070] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.
Claims
1. A calibration device, characterized by The calibration device comprises: a calibration assembly, which comprises a first roller and a calibration pattern arranged on a part of the surface of the first roller, the calibration pattern comprising a center circle and a plurality of sectors with gradually increasing diameters, the plurality of sectors being arranged on both sides of the center circle, the diameters of the sectors being arranged in the same direction as the axial direction of the first roller, and the center circle and the sectors being concentrically arranged; a vision assembly arranged on one side of the first roller and in the shooting range of the vision assembly.
2. The calibration device of claim 1, wherein The diameter of the largest sector is greater than or equal to the axial length of the first roller, and the diameter of the largest sector is greater than the diameter of the first roller, and the diameter of the center circle is less than the diameter of the first roller.
3. The calibration device of claim 1, wherein The diameters of two adjacent sectors are the same.
4. The calibration device of claim 1, wherein The calibration pattern is arranged on the surface of the first roller by spraying.
5. A calibration system characterized by, The calibration device comprises: The calibration device according to any one of claims 1-4; a driving mechanism, which comprises a first driving assembly and a first encoder for collecting the rotation speed signal of the first roller, the first roller being arranged at the output end of the first driving assembly; an industrial computer, the first driving assembly being communicatively connected to the industrial computer, the first encoder being communicatively connected to the industrial computer, and the vision assembly being communicatively connected to the industrial computer.
6. The calibration system of claim 5, wherein, The vision assembly is communicatively connected to the first encoder.
7. The calibration system of claim 5, wherein, The calibration system further comprises a light source assembly, which is communicatively connected to the industrial computer.
8. A delivery apparatus characterized by, The calibration system comprises: The calibration system according to any one of claims 5-7; a first roller mechanism, which is arranged at a distance from the calibration device.
9. The delivery apparatus of claim 8, wherein, The first roller mechanism comprises a second driving assembly and a second roller, the second roller being arranged at the output end of the second driving assembly, the second driving assembly being communicatively connected to the industrial computer, and the second roller forming an electronic cam with the first roller through the first encoder.
10. The delivery apparatus of claim 8, wherein, The conveying device further comprises a second roller mechanism, and the calibration device is arranged between the second roller mechanism and the first roller mechanism.