CN114778445A - Single-camera detection device and method based on optical path branching and winder - Google Patents
Single-camera detection device and method based on optical path branching and winder Download PDFInfo
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- CN114778445A CN114778445A CN202210273103.XA CN202210273103A CN114778445A CN 114778445 A CN114778445 A CN 114778445A CN 202210273103 A CN202210273103 A CN 202210273103A CN 114778445 A CN114778445 A CN 114778445A
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Abstract
The application relates to a single-camera detection device and method based on optical path branching and a winding machine, wherein the device comprises: a camera; the first lens module is positioned in front of the camera, the first lens module has both light transmission performance and reflection performance, and the camera is used for shooting the insertion position of the winding needle through the first lens module; the second lens module has reflection performance, and the reflection surface of the second lens module and the camera are both positioned on the light reflection path of the first lens module; and the lens adjusting module is used for adjusting the pose of the first lens module and/or the second lens module so as to enable the rolling needle rolling-in position to be positioned on the light reflection path of the second lens module when the camera is used for shooting the rolling needle rolling-in position. Through the method and the device, the calibration precision is improved, the installation and the maintenance are simpler, the cost can be reduced, and the robustness of the detection system is better.
Description
Technical Field
The application relates to the technical field of lithium battery detection, in particular to a single-camera detection device and method based on optical path shunting and a winding machine.
Background
In the winding process of the lithium battery core, the distance between the cathode and the anode of the battery core and the distance between the cathode and the anode and the diaphragm need to be detected in real time, and unqualified battery cores are discharged. This process is critical and involves the quality control and safety of the battery. At present, due to the limitation of the size and the type change of the winding needle, a detection mode that a global camera is arranged at both an inserting position and a winding position is mostly adopted. However, the position degree of the camera is required to be very high in the mode, so that the installation and the later maintenance are very troublesome, the abnormity is easy to occur, and the detection precision is easily interfered by the outside.
Disclosure of Invention
The application provides a single-camera detection device and method for optical path shunting and a winder, which are used for solving the problems that double cameras are troublesome to install and maintain and detection precision is easily interfered by the outside. The technical scheme of the application is as follows:
according to a first aspect of embodiments of the present application, there is provided an optical path splitting-based single-camera detection apparatus, the apparatus including: a camera; the first lens module is positioned in front of the camera, the first lens module has both light transmission performance and reflection performance, and the camera is used for shooting the insertion position of the winding needle through the first lens module; the second lens module has reflection performance, and the reflection surface of the second lens module and the camera are positioned on the light reflection path of the first lens module; and the lens adjusting module is used for adjusting the pose of the first lens module and/or the second lens module so as to enable the rolling needle rolling-in position to be positioned on the light reflection path of the second lens module when the camera is used for shooting the rolling needle rolling-in position.
Further, when the camera is used for shooting a winding needle winding position, the optical path difference between a first optical path from the winding needle insertion position to the camera and a second optical path from the winding needle winding position to the camera is smaller than or equal to a preset optical path difference.
Furthermore, the first lens module is a half-transmitting half-reflecting mirror.
Furthermore, the camera, the first lens module, the second lens module and the lens adjusting module are arranged in a separated manner; or the camera, the first lens module, the second lens module and the lens adjusting module are integrally arranged.
Further, the lens adjusting module comprises: a lens position adjusting unit, configured to move the first lens module and/or the second lens module in a preset direction, so as to adjust a position of the first lens module and/or the second lens module in the preset direction; and the lens angle adjusting unit is used for adjusting the reflection angle of the first lens module and/or the second lens module.
Further, the device also comprises a fixing body, wherein the fixing body comprises a first fixing surface and a second fixing surface; the lens position adjusting unit comprises a connecting block which is arranged on the first fixing surface in a sliding manner; the lens angle adjusting unit comprises a connecting arm, the connecting arm is rotatably connected with the connecting block, and the second lens module is fixedly connected with the connecting arm; the second fixing surface is located in front of the camera, and the first lens module is fixedly arranged on the second fixing surface.
Further, the lens adjusting module comprises: a controller electrically connected to the camera for generating a control signal according to information acquired from the camera; the lens adjusting module is further used for adjusting the pose of the first lens module and/or the pose of the second lens module according to the control signal of the controller, so that the winding needle winding position is located on the light reflection path of the second lens module when the camera is used for shooting the winding needle winding position.
According to a second aspect of embodiments herein, there is provided a winding machine comprising an apparatus as defined in any one of the above first aspects.
According to a third aspect of embodiments of the present application, there is provided an optical path splitting-based single-camera detection method for a single-camera detection apparatus as described in any one of the above first aspects, the method including: acquiring first image information of the winding needle insertion position shot by the camera; acquiring second image information of the winding position of the winding needle shot by the camera; and when the definition of the first image information and the definition of the second image information are greater than or equal to the preset definition, stopping adjusting the pose of the first lens module and/or the second lens module, and detecting the rolling needle inserting position and the rolling needle rolling-in position by using the camera.
According to a fourth aspect of the embodiments of the present application, there is provided a single-camera detection method based on optical path splitting, for a single-camera detection apparatus as described in any one of the above first aspects, the method including: acquiring a first optical path from the winding needle insertion position to the camera; acquiring a second optical path from the winding position of the winding needle to the camera; and when the optical path difference between the first optical path and the second optical path is smaller than or equal to a preset optical path difference, stopping adjusting the pose of the first lens module and/or the second lens module, and detecting the winding needle inserting position and the winding needle winding position by using the camera.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects:
in an embodiment of the present application, there is provided an optical path splitting-based single camera detection apparatus, including: a camera; the first lens module is positioned in front of the camera, the first lens module has both light transmission performance and reflection performance, and the camera is used for shooting the insertion position of the winding needle through the first lens module; a second lens module located in a light reflection path of the first lens module, the second lens module having a reflective property; and the lens adjusting module is used for adjusting the pose of the first lens module and/or the second lens module so as to enable the rolling needle rolling-in position to be positioned on the light reflection path of the second lens module when the camera is used for shooting the rolling needle rolling-in position. Through the embodiment of the application, compared with a double camera, the calibration precision is improved, the installation and maintenance are simpler, the cost is reduced compared with the double camera, and the robustness of the detection system is better.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application and are not to be construed as limiting the application.
Fig. 1 is a schematic structural diagram of a single-camera detection device based on optical path splitting according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another single-phase machine detection device based on optical path splitting according to an embodiment of the present application.
Reference numerals are as follows:
1-camera 2-first lens module 3-winding needle insertion position
4-second lens module 5-rolling needle rolling position 6-fixing body
61-first fixing surface 62-second fixing surface 63-camera accommodating part
7-connecting block 8-connecting arm
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be implemented in sequences other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for presentation, analyzed data, etc.) referred to in this application are information and data authorized by the user or sufficiently authorized by each party.
In the winding process of the lithium battery core, the distance between the cathode and the anode of the battery core and the distance between the cathode and the anode and the diaphragm need to be detected in real time, and unqualified battery cores are discharged. This process is critical and involves the quality control and safety of the battery. At present, due to the limitation of the size and the type change of a winding needle, a detection mode that a global camera is arranged at an inserting position and a winding position is mostly adopted. However, the position degree of the camera is required to be very high in the mode, so that the installation and the later maintenance are very troublesome, the abnormity is easy to occur, and the detection precision is easily interfered by the outside.
Based on this, the present application provides a single-camera detection device based on optical path splitting, as shown in fig. 1, the device includes: a camera 1; the first lens module 2 is positioned in front of the camera 1, the first lens module 2 has both light transmission performance and reflection performance, and the camera 1 is used for shooting a winding needle insertion position 3 through the first lens module 2; the second lens module 4, the second lens module 4 has reflection performance, the reflecting surface of the second lens module 4 and the camera 1 are both located on the light reflection path of the first lens module 2; and the lens adjusting module is used for adjusting the pose of the first lens module 2 and/or the second lens module 4 so as to enable the winding needle winding position 5 to be positioned on the light reflection path of the second lens module 4 when the camera 1 is used for shooting the winding needle winding position 5.
In the embodiment of the present application, the first lens module 2 includes a lens having light transmittance and reflection performance, so as to ensure that a part of light incident to the first lens module 2 can pass through the first lens module 2, and a part of light can be reflected by the surface of the first lens module 2.
The first lens module 2 can be a half mirror, i.e. 50% of light can pass through the first lens module 2, and 50% of light can be reflected by the surface of the first lens module 2. Of course, the reflectance and transmittance may be in other ratios, for example, 55% transmittance and 45% reflectance, which is not limited in this application.
In this embodiment, the front of the camera 1 is the front of the lens of the camera 1, and the first lens module 2 is located in front of the camera 1, so that it can be ensured that external light can enter the lens of the camera 1 through the surface reflection of the first lens module 2.
In this embodiment, the reflective surface of the first lens module 2 can face the reflective surface of the second lens module 4 and the camera 1, so that the reflective surface of the second lens module 4 and the camera 1 are both located on the light reflection path of the first lens module 2, that is, the light reflected from the reflective surface of the first lens module 2 can be incident on the reflective surface of the second lens module 4 and the camera 1.
Similarly, the reflective surface of the second lens module 4 is disposed toward the needle winding position 5, so that the needle winding position 5 is located on the light reflection path of the second lens module 4, that is, the light reflected from the second lens module 4 can be incident on the needle winding position 5.
In this embodiment, after adjusting the pose of the first lens module 2 and/or the second lens module 4, the light on the surface of the winding needle insertion position 3 may enter the camera 1 through the first lens module 2, so that the winding needle insertion position 3 may be photographed in a half of the visual field of the camera 1; the light of rolling needle roll-in position 5 can be reflected to the reflecting surface of first lens module 2 through the reflecting surface of second lens module 4, the reflecting surface of first lens module 2 launches light to camera 1 again, thereby the other half field of vision of camera 1 can be shot roll needle roll-in position 5.
Preferably, when the camera 1 is used to photograph the winding needle winding position 5, an optical path difference between a first optical path from the winding needle insertion position 3 to the camera 1 and a second optical path from the winding needle winding position to the camera 1 is less than or equal to a preset optical path difference.
The first optical path (the optical path 1 shown in fig. 1) may be a distance from the winding pin insertion position 3 to the camera 1, and the second optical path (the optical path 2 shown in fig. 1) may be a distance from the camera 1 to the first lens module 2 plus a distance from the first lens module 2 to the second lens module 4 plus a distance from the second lens module 4 to the winding pin winding position 5. The preset optical path difference may be set based on a test, for example, the preset optical path difference may be set to 0.
In practical applications, since cameras have a certain depth of field range, the first optical path and the second optical path may be determined to be substantially the same directly from the field of view of the camera, in the case where the accuracy is not particularly high. The judgment method is to adjust the up-down, left-right positions and the reflection angles of the first lens module 2 and/or the second lens module 4, so that the visual field is clear.
For the case of high precision requirement, the first optical path and the second optical path may be specifically calculated, and the calculation method is based on the reflection principle of light and is not specifically developed here.
In the embodiment of the present application, by reducing the optical path difference between the first optical path and the second optical path, the first optical path and the second optical path may be made to coincide, so as to achieve the effect of simultaneously patting the winding needle winding position 5 and the winding needle winding position.
In this embodiment, adjusting the pose of the first lens module 2 and/or the second lens module 4 includes adjusting the position and the reflection angle of the corresponding lens module, and specifically, the lens adjusting module may include:
a lens position adjusting unit, configured to move the first lens module 2 and/or the second lens module 4 in a preset direction, so as to adjust a position of the first lens module 2 and/or the second lens module 4 in the preset direction;
and a lens angle adjusting unit for adjusting the reflection angle of the first lens module 2 and/or the second lens module 4.
In some embodiments, the camera 1, the first lens module 2, the second lens module 4, and the lens adjustment module are in a separate configuration.
In other embodiments, the camera 1, the first lens module 2, the second lens module 4, and the lens adjusting module may be integrally disposed.
In a particular embodiment, as shown in fig. 2, the device comprises a fixed body 6, the fixed body 6 comprising a first fixed surface 61 and a second fixed surface 62; the lens position adjusting unit comprises a connecting block 7, and the connecting block 7 is arranged on the first fixing surface 1 in a sliding manner; the lens angle adjusting unit comprises a connecting arm 8, the connecting arm 8 is rotatably connected with the connecting block 7, and the second lens module 4 is fixedly connected with the connecting arm 8; the second fixing surface 62 is located in front of the camera 1, and the first lens module 2 is fixedly disposed on the second fixing surface 62.
Wherein, first fixed surface 1 can be the inclined plane, so, when removing connecting block 7 on the first fixed surface 1, can realize the second lens module 4 moves about from top to bottom. Further, since the reflection surface of the second lens module 4 needs to be located on the light reflection path of the first lens module 2, the second fixing surface 62 is also generally an inclined surface.
Further, the fixing body 6 further includes a camera accommodating portion 63, the camera accommodating portion 63 is used for accommodating the camera 1, and the camera accommodating portion 63, the first fixing surface 1 and the second fixing surface 62 are respectively located at different positions of the fixing body 6, so as to realize optical matching among the camera 1, the second lens module 4 and the first lens module 2.
For example, as shown in fig. 2, the camera accommodating portion 63 is located at the upper right end of the fixing body 6, the first fixing surface 1 is located at the lower right end of the fixing body 6, and the second fixing surface 62 is located at the upper left end of the fixing body 6.
In practical application, when shooting detection is required, the connecting block 7 on the first fixing surface 1 can be slid to enable the second lens module 4 to move up and down and left and right, and the connecting arms 8 can be rotated at the same time, so that the second lens module 4 can be driven to rotate to adjust the visual field due to the fact that the second lens module 4 is arranged between the connecting arms 8.
In this application embodiment, the pose adjustment mode may be manual or automatic, and when automatically adjusting the pose, the lens adjustment module may include:
a controller electrically connected to the camera 1 for generating a control signal according to information acquired from the camera 1;
the lens adjusting module is further configured to adjust the pose of the first lens module 2 and/or the second lens module 4 according to the control signal of the controller, so that when the camera 1 is used to shoot the needle winding position 5, the needle winding position 5 is located on the light reflection path of the second lens module 4.
In the embodiment of the application, the detection of the winding needle insertion position 3 and the winding needle winding position 5 can be realized by using a single camera, the calibration precision is improved compared with that of a double camera, the installation and maintenance are simpler than that of the double camera, the cost is reduced compared with that of the double camera, and the robustness of the detection system is better.
The embodiment of the application also provides a winding machine which can comprise any one of the single-phase machine detection devices.
Regarding the winding machine in the embodiment of the present application, the composition of the single-phase machine detection device included therein and the specific manner of operation thereof have been described in detail in the above-mentioned embodiment of the camera detection device, and will not be described in detail herein.
The embodiment of the present application further provides a single-camera detection method based on optical path splitting, which is used in any one of the single-camera detection devices, and the method may include:
acquiring first image information of the winding needle insertion position shot by the camera;
acquiring second image information of the winding position of the winding needle shot by the camera;
and when the definition of the first image information and the definition of the second image information are greater than or equal to the preset definition, stopping adjusting the pose of the first lens module and/or the pose of the second lens module, and detecting the inserting position of the winding needle and the winding position of the winding needle by using the camera.
In the embodiment of the present application, since the cameras have a certain depth of field range, in a case where the accuracy is not particularly high, it is sufficient to determine that the first optical path and the second optical path are substantially the same through the field of view of the cameras. The judgment method is to adjust the up-down, left-right positions and the reflection angles of the first lens module 2 and/or the second lens module to ensure that the visual field is clear, so that the automatic detection of the single camera is realized.
The embodiment of the present application further provides a single-camera detection method based on optical path splitting, which is used for any one of the single-camera detection devices, and the method may include:
acquiring a first optical path from the winding needle insertion position to the camera;
acquiring a second optical path from the winding position of the winding needle to the camera;
and when the optical path difference between the first optical path and the second optical path is smaller than or equal to a preset optical path difference, stopping adjusting the pose of the first lens module and/or the second lens module, and detecting the winding needle inserting position and the winding needle winding position by using the camera.
In the embodiment of the present application, for a case where the requirement for precision is high, the first optical path and the second optical path may be specifically calculated, and the calculation method is based on the principle of light reflection and is not specifically developed here.
In the embodiment of the present application, by reducing an optical path difference between the first optical path and the second optical path, the first optical path and the second optical path may be made to be consistent, so as to achieve an effect of simultaneously tapping the winding needle winding position and the winding needle winding position.
The specific manner of the composition and operation of the single-phase machine detection device for executing the single-phase machine detection method in the embodiment of the present application has been described in detail in the above-mentioned embodiment of the single-phase machine detection device, and will not be described in detail here.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A single camera inspection device based on optical path splitting, the device comprising:
a camera;
the first lens module is positioned in front of the camera, the first lens module has both light transmission performance and reflection performance, and the camera is used for shooting the insertion position of the winding needle through the first lens module;
the second lens module has reflection performance, and the reflection surface of the second lens module and the camera are both positioned on the light reflection path of the first lens module;
and the lens adjusting module is used for adjusting the pose of the first lens module and/or the second lens module so as to enable the rolling needle rolling-in position to be positioned on the light reflection path of the second lens module when the camera is used for shooting the rolling needle rolling-in position.
2. The single-camera detection device according to claim 1, wherein an optical path difference between a first optical path from the needle winding position to the camera and a second optical path from the needle winding position to the camera is equal to or less than a predetermined optical path difference when the camera is used to photograph the needle winding position.
3. The single-camera inspection device of claim 1, wherein the first lens module is a half mirror.
4. The single-camera inspection device of claim 1, wherein the camera, the first lens module, the second lens module, and the lens adjustment module are in a separate configuration; or the like, or, alternatively,
the camera, the first lens module, the second lens module and the lens adjusting module are integrally arranged.
5. The single-camera inspection device of any one of claims 1-4, wherein the lens adjustment module comprises:
a lens position adjusting unit, configured to move the first lens module and/or the second lens module in a preset direction, so as to adjust a position of the first lens module and/or the second lens module in the preset direction;
and the lens angle adjusting unit is used for adjusting the reflection angle of the first lens module and/or the second lens module.
6. The single-camera inspection device of claim 5, wherein the device further comprises a fixture body comprising a first fixture face and a second fixture face;
the lens position adjusting unit comprises a connecting block which is arranged on the first fixing surface in a sliding manner;
the lens angle adjusting unit comprises a connecting arm, the connecting arm is rotatably connected with the connecting block, and the second lens module is fixedly connected with the connecting arm;
the second fixing surface is located in front of the camera, and the first lens module is fixedly arranged on the second fixing surface.
7. The single-camera inspection device of claim 1, wherein the lens adjustment module comprises:
a controller electrically connected to the camera for generating a control signal according to information acquired from the camera;
the lens adjusting module is further used for adjusting the pose of the first lens module and/or the second lens module according to the control signal of the controller, so that the winding needle winding position is located on the light reflection path of the second lens module when the camera is used for shooting the winding needle winding position.
8. A winding machine comprising a single-camera inspection device according to any one of claims 1 to 7.
9. A single-camera inspection method based on optical path splitting, for a single-camera inspection apparatus according to any one of claims 1 to 8, the method comprising:
acquiring first image information of the winding needle insertion position shot by the camera;
acquiring second image information of the winding position of the winding needle shot by the camera;
and when the definition of the first image information and the definition of the second image information are greater than or equal to the preset definition, stopping adjusting the pose of the first lens module and/or the second lens module, and detecting the rolling needle inserting position and the rolling needle rolling-in position by using the camera.
10. A single-camera inspection method based on optical path splitting, for use in a single-camera inspection device as claimed in any one of claims 1 to 8, the method comprising:
acquiring a first optical path from the winding needle insertion position to the camera;
acquiring a second optical path from the winding position of the winding needle to the camera;
and when the optical path difference between the first optical path and the second optical path is smaller than or equal to a preset optical path difference, stopping adjusting the pose of the first lens module and/or the second lens module, and detecting the inserting position and the rolling position of the rolling needle by using the camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210273103.XA CN114778445A (en) | 2022-03-18 | 2022-03-18 | Single-camera detection device and method based on optical path branching and winder |
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| CN202210273103.XA CN114778445A (en) | 2022-03-18 | 2022-03-18 | Single-camera detection device and method based on optical path branching and winder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116067619A (en) * | 2023-03-07 | 2023-05-05 | 宁德时代新能源科技股份有限公司 | Battery winding detection device, winding device, detection method, device, and medium |
| WO2024041518A1 (en) * | 2022-08-23 | 2024-02-29 | 无锡先导智能装备股份有限公司 | Inspection apparatus and winding device |
-
2022
- 2022-03-18 CN CN202210273103.XA patent/CN114778445A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024041518A1 (en) * | 2022-08-23 | 2024-02-29 | 无锡先导智能装备股份有限公司 | Inspection apparatus and winding device |
| CN116067619A (en) * | 2023-03-07 | 2023-05-05 | 宁德时代新能源科技股份有限公司 | Battery winding detection device, winding device, detection method, device, and medium |
| CN116067619B (en) * | 2023-03-07 | 2023-08-11 | 宁德时代新能源科技股份有限公司 | Battery winding detection device, winding device, detection method, device, and medium |
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