CN111735825A - Pole piece edge detection device and detection method - Google Patents
Pole piece edge detection device and detection method Download PDFInfo
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- CN111735825A CN111735825A CN202010837353.2A CN202010837353A CN111735825A CN 111735825 A CN111735825 A CN 111735825A CN 202010837353 A CN202010837353 A CN 202010837353A CN 111735825 A CN111735825 A CN 111735825A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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Abstract
The invention relates to a pole piece edge detection device and a detection method, wherein the pole piece edge detection device comprises: the base, locate the formation of image subassembly on the base, the light source subassembly for paste the stabilizer of tight pole piece. The pole piece edge detection device is arranged on a production line of a pole piece, the light source assembly focuses light beams on the outer edge of the stabilizer, when the pole piece passes through the stabilizer, the pole piece is attached to the stabilizer, the edge of the pole piece penetrates through the set area, the imaging assembly shoots pole piece images of the set area to be used as sampling detection, and the pole piece can be detected in the production process. The invention adopts the real-time detection on the production line, improves the image brightness by combining the light source assembly, ensures the edge of the pole piece to be stable in the set area by the stabilizer, ensures that the pole piece edge image shot by the imaging assembly in the set area meets the detection requirement, overcomes the problem that the imaging assembly cannot shoot the qualified detection image when the lithium battery pole piece is detected in real time, and achieves the technical effect of real-time detection and accuracy on the production line.
Description
Technical Field
The invention relates to the field of lithium battery pole pieces, in particular to a pole piece edge detection device and a detection method.
Background
The lithium battery pole piece adopts a roll-to-roll production mode, the normal production process does not allow belt breakage, the pole piece is very thin, and if real-time detection is adopted, the image detected by the imaging assembly has the conditions of insufficient brightness, smear and the like, so that the imaging assembly cannot shoot the qualified detection image. Therefore, the sampling of the lithium battery pole piece can be only performed after the production is completed, and the sampling result has certain hysteresis. At present, the edge of the lithium battery pole piece is detected by adopting a manual sampling mode, so that the sampling efficiency is low and the accuracy is low.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a pole piece edge detection device and a detection method, so as to solve the problem that an imaging assembly cannot shoot qualified detection images when a lithium battery pole piece is detected in real time.
In order to solve the above technical problem, an embodiment of the present invention provides a pole piece edge detection apparatus, including: the device comprises a base, an imaging assembly arranged on the base, a light source assembly and a stabilizer tightly attached to a pole piece; the light beam emitted by the light source component is focused to a set area on the outer edge of the stabilizer; when the pole piece passes through the stabilizer, the pole piece is tightly attached to the stabilizer, and the edge of the pole piece passes through the set area; the imaging component shoots an image of the set area.
Furthermore, the imaging component comprises a camera and an imaging lens arranged at the front end of the camera; the pole piece edge detection device further comprises a focusing assembly used for adjusting the distance between the camera and the carrying assembly.
Furthermore, the imaging assembly further comprises a refraction lens arranged at the front end of the imaging lens.
Further, the imaging assembly further comprises a mounting seat for mounting a camera; the mounting seat is connected to the base in a sliding mode; the focusing assembly drives the mounting seat to move so that the imaging lens is close to or far away from the set area.
Furthermore, the focusing assembly comprises a driving motor and a screw rod in transmission connection with the output end of the driving motor; the mounting seat is provided with a nut in transmission connection with the screw rod.
Furthermore, the pole piece edge detection device also comprises a controller and an upper computer; the driving motor and the imaging assembly are respectively and electrically connected with the controller; the controller is in communication connection with the upper computer.
Further, the light source assembly comprises a mounting rack and at least two LED lamp beads; the mounting frame is provided with an annular mounting part, and the middle part of the mounting frame is provided with a shooting channel; the LED lamp beads are fixed on the mounting part and the emitted light beams are focused in a set area; the imaging component shoots the image of the set area through the shooting channel.
Further, the pole piece edge detection device also comprises a light source driver; the light source driver is electrically connected with the LED lamp beads.
Furthermore, the stabilizer comprises a rotating bracket fixed on the base and a roller rotatably connected to the rotating bracket; the rotating support comprises a fixed support fixed on the base and an adjusting piece rotatably connected to the fixed support; the adjusting piece is provided with an installation shaft for rotatably installing the roller.
Correspondingly, the embodiment of the invention also provides a pole piece detection method, and the detection method adopts the pole piece edge detection device; the upper computer of the pole piece edge detection device is provided with an image analysis unit and a storage unit; the detection method comprises the following steps: a shooting step: the imaging assembly shoots a pole piece image in a set area; a sending step: the imaging assembly sends the shot pole piece image to an upper computer; and (3) an analysis step: comprises a first judging step and a second judging step; the first judging step includes: an image analysis unit of the upper computer analyzes whether the pole piece image is clear or not, if not, the controller controls the focusing assembly to move the imaging assembly and returns to the shooting step; if yes, entering a second judgment step; the second judging step includes: the image analysis unit further judges whether the image has defects; if yes, storing the image in the storage unit; if not, the upper computer informs the controller to return to the shooting step to shoot the next image.
Further, the controller controlling the focus adjustment assembly to move the imaging assembly and returning to the photographing step includes: the controller sends a focusing instruction to the driving motor according to the analysis result of the image analysis unit; the driving motor drives the mounting seat and the imaging assembly to move; and returning to the shooting step.
The embodiment of the invention provides a pole piece edge detection device which can be arranged on a pole piece production line, a light source assembly focuses light beams on the outer edge of a stabilizer, when a pole piece passes through the stabilizer, the pole piece is tightly attached to the stabilizer, the edge of the pole piece passes through a set area, an imaging assembly shoots a pole piece image of the set area to be used for sampling detection, and the pole piece can be detected in the production process. The invention adopts the real-time detection on the production line, improves the image brightness by combining the light source assembly, ensures the edge of the pole piece to be stable in the set area by the stabilizer, and ensures that the image of the edge of the pole piece shot by the imaging assembly in the set area meets the detection requirement, thereby being convenient for detecting the quality of the edge of the pole piece, overcoming the problem that the imaging assembly can not shoot the qualified detection image when the lithium battery pole piece is detected in real time, and achieving the technical effect of real-time detection and accuracy on the production line.
Furthermore, the distance between the camera and the object carrying assembly is adjusted through the focusing assembly, so that the camera can clearly shoot images of the pole piece, and accurate detection results are obtained.
The embodiment of the invention also provides a pole piece detection method, which adopts the technical means of detecting the pole piece shooting image by the pole piece edge detection device, overcomes the problem that an imaging assembly cannot shoot a qualified detection image when the lithium battery pole piece is detected in real time, and achieves the technical effect of real-time detection and precision on a production line.
The invention is further described below with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a perspective view of an edge detection apparatus for a pole piece according to an embodiment of the present invention;
FIG. 2 is a top view of the pole piece edge detection apparatus of the embodiment of FIG. 1;
FIG. 3 is a flowchart of a pole piece detection method according to an embodiment of the present invention;
fig. 4 is a flow chart of the adjustment step of fig. 3.
The reference numbers illustrate:
1 base 2 imaging assembly
21 camera 22 imaging lens
23 Refraction lens 24 mounting seat
3 light source assembly 31 mounting rack
32 LED lamp bead 33 shooting channel
4 stabilizer 5 focusing assembly
51 motor driver 6 light source driver
7 pole pieces.
Detailed Description
In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further described and illustrated below with reference to the schematic drawings, but not limited thereto.
If directional indications (such as up, down, left, right, front, and rear … …) are provided in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the movement, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
As shown in fig. 1, a pole piece edge detection apparatus includes: the base 1, locate formation of image subassembly 2 on the base 1, light source subassembly 3 for paste the stabilizer 4 of tight pole piece. The light beam emitted by the light source component 3 is focused to a set area on the outer edge of the stabilizer, when the pole piece 7 passes through the stabilizer 4, the pole piece 7 is tightly attached to the stabilizer 4, the edge of the pole piece passes through the set area, and the imaging component 3 shoots an image of the set area. The base 1 is fixed on a pole piece production line, the produced pole piece passes through the stabilizer 4, and when the edge needing to be detected passes through a set area, the imaging assembly detects the edge of the pole piece 7.
Preferably, the imaging assembly 2 includes a camera 21, an imaging lens 22 disposed at a front end of the camera 21, and the pole piece edge detection device further includes a focusing assembly 5 for adjusting a distance between the camera 21 and the object bearing assembly 4.
Preferably, light source subassembly 3 includes mounting bracket 31, LED lamp pearl 32, and mounting bracket 31 is equipped with annular installation department, and the middle part of mounting bracket 31 is equipped with shoots passageway 33. LED lamp pearl 32 is fixed in the installation department and the light beam focus of transmission is in setting for the region, and imaging component 2 sees through shooting the passageway 33 and shoots for the region. The mounting bracket 31 comprises a first body and a second body, the second body is arranged on the inner side of the first body and is positioned on one side far away from the imaging assembly 2, the number of the LED lamp beads 32 on the first body is 15, and the number of the LED lamp beads 32 on the second body is 9.
Preferably, the imaging assembly 2 further includes a refractive lens 23 disposed at a front end of the imaging lens 22, and the refractive lens 23 is disposed at a rear side of the photographing passage 33 of the mounting frame 31.
Preferably, the pole piece edge detection device further comprises a light source driver 6, and the light source driver 6 is electrically connected with the LED lamp bead 32. In order to ensure the detection quality, the imaging resolution of the imaging component 2 needs to reach 2 micrometers, the minimum detection size is 10 micrometers, in order to avoid smearing of the imaging, the exposure time of a light source needs to be controlled within 3 microseconds, meanwhile, in order to ensure that the image has enough brightness, the current of the light source component needs to reach 60 amperes within 3 microseconds, and the mounting frame with the annular structure can play a role in light condensation, so that the brightness of shooting electricity is increased. The camera 21 is a camera with a pixel size of 5.86 microns, and the imaging lens 22 is a 3-time telecentric lens.
Preferably, the pole piece edge detection device further comprises a controller and an upper computer, wherein the light source driver 6, the focusing assembly 5 and the imaging assembly 2 are respectively electrically connected with the controller, and the controller is in communication connection with the upper computer.
Preferably, the stabilizer includes a rotation bracket fixed to the base, and a roller rotatably coupled to the rotation bracket. The rotating support comprises a fixed support fixed on the base, an adjusting piece connected to the fixed support in a rotating mode, and an installation shaft used for rotating the installation roller is arranged on the adjusting piece.
As shown in fig. 2, the imaging assembly 2 further includes a mounting seat 24 for mounting the camera 21, the mounting seat 24 is slidably connected to the base 1, and the focusing assembly 5 drives the mounting seat 24 to move, so that the imaging lens 22 is close to or far away from the set area, thereby realizing zooming and facilitating the imaging assembly 2 to shoot a clear pole piece image.
Preferably, the focusing assembly 5 comprises a driving motor, a screw rod in transmission connection with an output end of the driving motor, and a motor driver 51. The mounting seat 24 is provided with a nut in transmission connection with the screw rod, and the mounting seat 24 is in sliding connection with the base 1 through a linear sliding table. Because a resolution of 2 microns is required and the depth of field is only about 100 microns, the jitter of the pole piece during operation can exceed the range, and the position adjustment of the focusing assembly on the imaging assembly can compensate the fluctuation of the range.
Preferably, the base 1 is further provided with a protective shell, and the light source assembly 3, the refractive lens 23 and the imaging lens 22 are arranged in the protective shell.
The utility model provides a pole piece edge detection device, it can set up on the production line of pole piece, bear the pole piece through carrying thing subassembly 4, light source subassembly 3 is with the setting region of light beam focusing on carrying thing subassembly 4, when the pole piece is through carrying thing subassembly 4, the pole piece image that this region was shot to imaging assembly 2 is as sampling detection, can realize detecting the pole piece in the production process just, and can avoid the damage of artifical sample to the pole piece, the sample that obtains is more dispersed, higher sample value has, its testing result also has the representativeness, can be through the quality that detects accurate reaction whole book pole piece. The invention overcomes the technical problem of lagging detection of the lithium battery pole piece by adopting the technical means of instant detection on the production line, and achieves the technical effects of instant detection and accuracy on the production line.
In one embodiment, the imaging assembly is not provided with a refractor, and the imaging lens of the imaging assembly is directly arranged at the rear side of the shooting channel.
As shown in fig. 3, in the detection method, the pole piece edge detection device is adopted, and an upper computer of the pole piece edge detection device is provided with an image analysis unit and a storage unit; the detection method comprises the following steps:
a shooting step: the imaging assembly shoots a pole piece image in a set area;
a sending step: the imaging assembly sends the shot pole piece image to an upper computer;
and (3) an analysis step: comprises a first judging step and a second judging step;
the first judging step includes: an image analysis unit of the upper computer analyzes whether the pole piece image is clear or not, if not, the controller controls the focusing assembly to move the imaging assembly and returns to the shooting step;
if yes, entering a second judgment step;
the second judging step includes: the image analysis unit further judges whether the image has defects;
if yes, storing the image in the storage unit;
if not, the upper computer informs the controller to return to the shooting step to shoot the next image.
As shown in fig. 4, for the adjustment step: the controller controls the focusing assembly to move the imaging assembly and returns to the shooting step, and the method specifically comprises the following steps:
the controller sends a focusing instruction to the driving motor according to the analysis result of the image analysis unit;
the driving motor drives the mounting seat and the imaging assembly to move;
and returning to the shooting step.
The second judgment step is mainly used for judging whether pixels of the pole piece image meet requirements or not and cannot meet the requirements for detecting the quality of the pole piece, if the shot picture does not meet the requirements, the focusing assembly is used for adjusting the distance between the imaging assembly and the set area to adjust the focal length, so that the clear and required pole piece image is shot, the shot and required image is used as a sample for sampling detection, the whole sampling detection process cannot damage the pole piece, and the whole pole piece is not damaged in a manual sampling mode.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A pole piece edge detection device, comprising: the device comprises a base, an imaging assembly arranged on the base, a light source assembly and a stabilizer tightly attached to a pole piece; the light beam emitted by the light source component is focused to a set area on the outer edge of the stabilizer; when the pole piece passes through the stabilizer, the pole piece is tightly attached to the stabilizer, and the edge of the pole piece passes through the set area; the imaging component shoots an image of the set area.
2. The pole piece edge detection device of claim 1, wherein the imaging assembly comprises a camera and an imaging lens disposed at a front end of the camera; the pole piece edge detection device further comprises a focusing assembly used for adjusting the distance between the camera and the carrying assembly.
3. The pole piece edge detection apparatus of claim 2 wherein the imaging assembly further comprises a refractive lens disposed at a front end of the imaging lens.
4. The pole piece edge detection apparatus of claim 2, wherein the imaging assembly further comprises a mount for mounting a camera; the mounting seat is connected to the base in a sliding mode; the focusing assembly drives the mounting seat to move so that the imaging lens is close to or far away from the set area.
5. The pole piece edge detection device of claim 4, wherein the focusing assembly comprises a driving motor, a lead screw in transmission connection with an output end of the driving motor; the mounting seat is provided with a nut in transmission connection with the screw rod.
6. The pole piece edge detection device of claim 5, further comprising a controller, an upper computer; the driving motor and the imaging assembly are respectively and electrically connected with the controller; the controller is in communication connection with the upper computer.
7. The pole piece edge detection device of claim 1, wherein the light source assembly comprises a mounting bracket, at least two LED light beads; the mounting frame is provided with an annular mounting part, and the middle part of the mounting frame is provided with a shooting channel; the LED lamp beads are fixed on the mounting part and the emitted light beams are focused in a set area; the imaging component shoots the image of the set area through the shooting channel.
8. The pole piece edge detection device of claim 1, wherein the stabilizer comprises a rotating bracket fixed to the base, and a roller rotatably connected to the rotating bracket; the rotating support comprises a fixed support fixed on the base and an adjusting piece rotatably connected to the fixed support; the adjusting piece is provided with an installation shaft for rotatably installing the roller.
9. A pole piece detection method is characterized in that the detection method adopts the pole piece edge detection device of claim 6; the upper computer of the pole piece edge detection device is provided with an image analysis unit and a storage unit; the detection method comprises the following steps:
a shooting step: the imaging assembly shoots a pole piece image in a set area;
a sending step: the imaging assembly sends the shot pole piece image to an upper computer;
and (3) an analysis step: comprises a first judging step and a second judging step;
the first judging step includes: an image analysis unit of the upper computer analyzes whether the pole piece image is clear or not, if not, the controller controls the focusing assembly to move the imaging assembly and returns to the shooting step;
if yes, entering a second judgment step;
the second judging step includes: the image analysis unit further judges whether the image has defects;
if yes, storing the image in the storage unit;
if not, the upper computer informs the controller to return to the shooting step to shoot the next image.
10. The pole piece detection method of claim 9, wherein the controller controlling the focus assembly to move the imaging assembly and returning to the capturing step comprises:
the controller sends a focusing instruction to the driving motor according to the analysis result of the image analysis unit;
the driving motor drives the mounting seat and the imaging assembly to move;
and returning to the shooting step.
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| CN202010837353.2A CN111735825A (en) | 2020-08-19 | 2020-08-19 | Pole piece edge detection device and detection method |
| CN202110831004.4A CN113588687A (en) | 2020-08-19 | 2021-07-22 | Pole piece edge detection device and detection method |
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| CN202010837353.2A CN111735825A (en) | 2020-08-19 | 2020-08-19 | Pole piece edge detection device and detection method |
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| CN202110831004.4A Pending CN113588687A (en) | 2020-08-19 | 2021-07-22 | Pole piece edge detection device and detection method |
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| CN113203682A (en) * | 2021-05-18 | 2021-08-03 | 哈尔滨工业大学（深圳） | A lid surface defect automatic monitoring device behind cell phone case for assembly line |
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