CN220137712U

CN220137712U - Visual imaging calibrating device

Info

Publication number: CN220137712U
Application number: CN202321572162.3U
Authority: CN
Inventors: 谢飞; 靳玲伟; 衡海龙; 余招宇
Original assignee: Rept Battero Energy Co Ltd
Current assignee: Rept Battero Energy Co Ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-12-05
Anticipated expiration: 2033-06-19

Abstract

The utility model relates to a visual imaging calibration device, comprising: the material carrier assembly comprises a roller and a calibration sheet, the calibration sheet is fixed on the surface of the roller, the shooting assembly comprises a camera, the roller is positioned at one side of the camera and in the shooting range of the camera, and the camera is used for acquiring and sending the image of the calibration sheet; the upper computer unit is in communication connection with the camera, and is used for receiving and analyzing the image data of the calibration film image and adjusting the camera precision according to the comparison result of the image data and the preset data. The camera can shoot the images of the calibration sheet simultaneously in the working process, and the camera is connected with the upper computer component in a communication way, so that the camera can directly upload the shot images of the calibration sheet to the upper computer component, the upper computer component can generate adjustment parameters of the camera after the calibration sheet is processed, and the parameters of the camera are adjusted, thereby greatly improving the calibration efficiency of the camera.

Description

Visual imaging calibrating device

Technical Field

The utility model relates to the field of machine vision detection, in particular to a vision imaging calibration device.

Background

With the improvement of the intelligent and automatic degree of secondary battery manufacturing, machine vision products are beginning to be widely applied to each section of secondary battery equipment production. The coating rolling of the front-stage process, the assembly of the battery cells of the middle-stage process, the detection after the later-stage formation and the module PACK stage, and the permeability of the machine vision application are gradually improved. The wide use of machine vision in secondary battery devices brings a significant improvement in quality control of secondary batteries. By taking visual detection as an example, the use of machine vision can avoid pollution caused by manual operation on one hand and cut off the flow direction of batch defective products to the terminal on the other hand.

In the current battery manufacturing, in the coating process, the rolling process, the die cutting process and the winding process, the detection precision of the camera may be changed due to various factors such as mechanical vibration, foreign matter pollution, personnel misoperation and the like, so that the camera for visual detection needs to be detected and calibrated every time a period of time. The existing calibration mode usually uses a camera to be calibrated to shoot an image of a calibration sheet by a worker holding the calibration sheet to the site, then inputs the image of the calibration sheet to other measuring equipment (such as a computer) for processing, further determines the accuracy of the camera and the adjustment parameters of the camera, and then manually adjusts the parameters in the camera.

In the prior art, in the process of calibrating the camera, the manual operation is large, human errors are easily caused, and the calibration efficiency is low. And the equipment cannot operate in the calibration process, so that the shutdown loss is serious.

Disclosure of Invention

The embodiment of the utility model provides a visual imaging calibration device, which is used for solving the problem that the efficiency of a mode of detecting the precision of a camera and adjusting parameters in the related art is lower.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a visual imaging calibration apparatus, comprising: the material carrier assembly comprises a roller and a calibration sheet, and the calibration sheet is fixed on the surface of the roller; the shooting assembly comprises a camera, the roller is positioned at one side of the camera and is positioned in the shooting range of the camera, and the camera is used for collecting images of the standard pieces and sending the images of the standard pieces to the upper computer assembly; the upper computer unit is in communication connection with the camera, and is used for receiving and analyzing the image data of the standard piece and adjusting the camera precision according to the comparison result of the image data and the preset data.

In some embodiments, the photographing assembly includes: the camera comprises a mounting frame, a fixing seat and a base, wherein the mounting frame is connected with the camera through the mounting seat; the fixing seats are fixed on two sides of the mounting frame; the base is movably connected with the fixing seat, and the fixing seat rotates relative to the base.

In some embodiments, the mounting frame is provided with a track groove, and the mounting seat moves and is kept in the track groove.

In some embodiments, the shooting assembly further comprises: and the protective cover is sleeved on the surface of the camera and is connected with the mounting seat.

In some embodiments, the visual imaging calibration apparatus further comprises: the polishing assembly comprises a light source body and a light source controller connected with the light source body, wherein the light source controller is electrically connected with the upper computer assembly, and the roller is positioned on one side of the light source body and in the light source irradiation range of the light source body.

In some embodiments, the lighting assembly further comprises an adjusting bracket, the adjusting bracket comprises a base, a supporting piece and a connecting piece, the end part of the supporting piece is connected with the base, the connecting piece is movably arranged on the supporting piece, and the light source body is connected with the adjusting bracket through the connecting piece.

In some embodiments, the over roller is provided with an encoder, and the encoder is electrically connected with the camera.

In some embodiments, the upper computer assembly includes an industrial personal computer and a display, the industrial personal computer is connected with the camera and the display, and is used for receiving and analyzing the image data of the calibration sheet image and transmitting the image data to the display for display.

In some embodiments, the visual imaging calibration apparatus further comprises an alarm assembly coupled to the upper computer assembly.

In some embodiments, the calibration sheet is rectangular, the calibration sheet comprises a plurality of checkerboards, and two adjacent checkerboards are different in color.

The technical scheme provided by the utility model has the beneficial effects that:

the embodiment of the utility model provides a visual imaging calibration device, which is characterized in that a calibration piece with a fixed size is connected with a passing roller, an image of the calibration piece can be shot at the same time in the working process of a camera, the passing roller is not required to be stopped in the shooting process, and the camera is communicated with an upper computer component to directly upload the shot image of the calibration piece to the upper computer component, after the calibration piece is processed, the upper computer component generates adjustment parameters of the camera and adjusts the parameters of the camera.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an overall structure according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a shooting assembly according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a polishing assembly and a material carrier assembly according to an embodiment of the present utility model.

In the figure: 1. a shooting assembly; 10. a base; 11. a mounting frame; 110. a track groove; 12. a camera; 13. a protective cover; 14. a mounting base; 15. a fixing seat;

2. a polishing assembly; 20. adjusting the bracket; 200. a base; 201. a support; 202. a connecting piece; 21. a light source body;

3. a material carrier assembly; 30. passing through a roller; 31. the pieces were identified.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment of the utility model provides a visual imaging calibration device which can solve the problem that the efficiency of a mode of detecting camera precision and adjusting parameters in the related art is low.

Referring to fig. 1 to 3, an embodiment of the present utility model provides a visual imaging calibration apparatus, which includes: the material carrier assembly 3, the shooting assembly 1 and the upper computer assembly, wherein the material carrier assembly 3 comprises a roller 30 and a calibration sheet 31, the calibration sheet 31 is fixedly arranged on the surface of the roller 30, the shooting assembly 1 comprises a camera 12, the roller 30 is positioned at one side of the camera 12 and is positioned in the shooting range of the camera 12, and the camera 12 is used for acquiring an image of the calibration sheet 31 and transmitting the image of the calibration sheet 31 to the upper computer assembly; the upper computer unit is connected with the camera 12, and is used for receiving and analyzing the image data of the standard sheet 31 and adjusting the precision of the camera 12 according to the comparison result of the image data and preset data.

The utility model connects the calibration piece 31 with fixed size with the over-roller 30, the camera 12 is connected with the upper computer component in a communication way, the camera 12 can shoot the image of the calibration piece 31 at the same time in the working process, the stopping operation is not needed to be carried out on the over-roller 30 in the shooting process, the camera 12 can directly upload the shot image of the calibration piece 31 into the upper computer component, the upper computer component can analyze the image data of the calibration piece 31 with fixed size in real time and compare the image data with the preset data, so as to judge whether the precision of the camera 12 in the working process is changed, and the upper computer component can adjust the precision of the camera 12 in real time when the precision is changed; the camera 12 precision is detected and adjusted through the upper computer assembly, a manual field photo is replaced, after the photo is subjected to data analysis, the camera 12 precision is manually calibrated, the manual participation rate is reduced, the calibration can be performed in real time, the detection precision of the camera 12 is improved, and the loss of materials is reduced.

It should be noted that, because the roller 30 is in a rotation state during the working process, in order to improve the shooting precision of the calibration sheet 31, the camera 12 adopted in the embodiment of the utility model is a line scanning camera, and the principle of the line scanning camera is as follows: the line scanning camera generally shoots only one line (the line width is usually 1 pixel) at a time, and continuously shoots the line in the process of the movement of the mechanism, so that the line scanning camera gathers lines to form a surface, and finally complete shooting of the calibration sheet 31 is finished, and further shooting precision in the movement process of the calibration sheet 31 is realized.

There are various ways of shooting by the camera 12, for example:

in some possible embodiments, the over-roller 30 rotates at a constant speed, setting the same interval time camera 12 to shoot once;

in other possible embodiments, an encoder is provided on the over-roller 30, the encoder being electrically connected to the camera 12, and the encoder triggering the camera 12 to take a picture once after the over-roller 30 is rotated by a certain angle. Specifically, the encoder is fixed to the shaft end of the over-roller 30. An encoder is a device that compiles, converts, or communicates, transmits, and stores signals or data into a signal form. In this embodiment, the encoder converts the angular displacement into an electrical signal. The encoder in the utility model can select an incremental encoder which converts the displacement into a periodic electric signal, then converts the electric signal into counting pulses, and the number of the pulses is used for representing the size of the displacement. Thus, the over-roller 30 emits a pulse signal every unit of angular encoder rotation, which in turn triggers the camera 12 to take a picture.

The label 31 is attached to the roller 30 by means of a high-viscosity glue in order to provide the camera 12 with a standard size control. There are various types of arrangement patterns of the calibration sheet 31, and the calibration sheet 31 may be rectangular, square, or rectangular, and the calibration sheet 31 may include a plurality of checkerboards, for example, the calibration sheet 31 may be three rows and three columns of checkerboards having a size of 5mm×5 mm. If the black-and-white camera 12 is used as the camera 12, the checkerboard is set to be black-and-white in order to avoid errors in photographing by the camera 12 using other colors, as shown in fig. 1. The label 31 may be a film or may be made of plastic or metal.

It should be noted that in the prior art: the upper computer is a computer which can directly send out control commands, and various signal changes are displayed on a screen. The upper computer unit in this embodiment has the functions of receiving and analyzing the image of the calibration piece 31, storing the preset data of the calibration piece 31, comparing the shot image data of the calibration piece 31 with the preset data, and adjusting the camera precision by using the comparison result. How to analyze the image data, and determine and adjust the accuracy of the camera, reference may be made to the prior art: for example, chinese patent application No. 202110661195.4 discloses a calibration method of a battery plate detection device based on machine vision.

Further, in this embodiment, the upper computer unit includes an industrial personal computer and a display, the industrial personal computer is connected to the camera 12 and the display, and is configured to receive and analyze the image data of the image of the standard sheet 31, and transmit the image data to the display for display.

Specifically, the industrial personal computer receives the image of the calibration sheet 31 transmitted from the camera 12, analyzes the image of the calibration sheet 31, and displays the analyzed image data on a display screen.

Wherein the image data of the calibration piece 31 includes the size data of the image of the calibration piece 31, the higher the accuracy of the camera 12, the closer the size data of the calibration piece 31 in the acquired image of the calibration piece 31 to the real size data of the calibration piece 31. Since the size data of the calibration piece 31 is fixed, when the camera 12 captures an image of the calibration piece 31, the industrial control computer obtains the size data of the calibration piece 31 and the camera precision corresponding to the size data of the calibration piece 31 in the captured image of the calibration piece 31, and if the calculated size data and the preset real size data of the calibration piece 31 are excessively different, the size data is abnormal data, which indicates that an error occurs in the camera precision, and the industrial control computer needs to adjust the camera precision. Further, after the industrial personal computer analyzes the size data each time, the latest size data and the camera precision before adjustment are stored, if abnormal data continuously appear, the industrial personal computer sends a stop signal, and the stop signal is displayed on a display screen to remind workers;

the image data of the prescribed piece 31 also includes gradation value data. The industrial personal computer is provided with a gray value threshold range, when the camera 12 shoots an image of the calibration sheet 31, the industrial personal computer analyzes the image gray value data in the shot image of the calibration sheet 31, compares the image gray value data with the gray value threshold range, and sends a warning signal when the image gray value data is not in the gray value threshold range, and the warning signal is displayed on the display screen to remind workers.

Further, in order to enable automatic calibration of the accuracy of the camera 12 when the image gray-scale value data is not within the gray-scale value threshold value range, the visual imaging calibration apparatus is provided to further include a lighting assembly 2. Specifically, the lighting assembly 2 includes a light source body 21 and a light source controller connected to the light source body 21. The light source body 21 is a non-standardized LED lamp capable of freely adjusting the intensity of the light source, the light source controller is electrically connected with the upper computer unit, namely is connected with the industrial personal computer through a cable, and the roller 30 is positioned on one side of the light source body 21 and is positioned in the light source irradiation range of the light source body 21. When the gray value data of the image of the calibration sheet 31 photographed by the camera 12 is not within the gray value threshold range, the industrial control computer outputs an adjustment signal to the light source controller, by which the brightness of the light source emitted from the light source body 21 is adjusted. When the brightness of the light source is adjusted, the camera 12 continuously shoots the images of the calibration piece 31, and the industrial personal computer continuously analyzes the gray value data of the images of the calibration piece 31 until the gray value data of the calibration piece 31 returns to be within the gray value threshold range.

On the basis of the above-described embodiments, in the present embodiment, when the light source is adjusted, not only the brightness of the light source can be adjusted by the light source controller, but also the adjusting bracket 20 can be provided to adjust the up-down irradiation angle and the left-right irradiation range of the light source. Specifically, the setting lighting assembly 2 further includes an adjusting bracket 20, and the setting light source body 21 is connected with the adjusting bracket 20, and the adjusting bracket 20 is used for supporting the light source body 21, and can also be used for adjusting the left and right irradiation range of the light source and the distance between the adjusting light source body 21 and the roller 30.

Specifically, in the present embodiment, the adjusting bracket 20 includes a base 200, on which a supporting member 201 is disposed on the base 200, and the supporting member 201 is of a telescopic structure, for example, the supporting member 201 is a telescopic metal cylinder with a smooth surface. The light source body 21 is connected with the supporting member 201 through the connecting member 202, the connecting member 202 is movably connected with the supporting member 201, for example, the connecting member 202 is a mounting plate, a plurality of threaded holes with different positions are formed in the surface of the supporting member 201, and the mounting plate is locked on the surface of the supporting member 201 through hexagonal screws. By adjusting the amount of expansion and contraction of the support 201 and the position of the connector 202 on the support 201, the up-down irradiation angle and the left-right irradiation range of the light source can be adjusted: when the amount of expansion and contraction of the support 201 is changed, the left and right irradiation ranges of the light source are changed; the connection member 202 is rotatably connected to the support member 201, and when the connection member 202 is rotated on the support member 201 by a certain angle, the up-down irradiation angle of the light source is changed.

When the device is in an operating state, the display may display an image photographed by the current camera, the current camera accuracy, the illumination intensity of the light source body 21, the gray value of the calibration sheet 31 photographed by the camera at the current illumination intensity, and the like. In order to remind staff in time when abnormal data appear, in the embodiment, the visual imaging calibration device further comprises an alarm assembly, the alarm assembly is connected with the upper computer assembly, the upper computer assembly is further used for outputting an alarm signal according to a comparison result of the image data and preset data, and the alarm assembly is used for receiving the alarm signal and alarming.

In this embodiment, the alarm assembly is connected to the industrial personal computer, and when abnormal data or operation failure occurs, the industrial personal computer outputs an alarm signal to the alarm assembly. The alarm component can be a three-color lamp, the three-color lamp displays different colors when the image data are normal, the image data are abnormal once and the abnormal data continuously appear, so that the working state of the device can be visualized, and when a system has a problem, workers can be reminded of processing the abnormality in time; the alarm component can also be an alarm bell, and when the image data is abnormal, the alarm bell sounds.

On the basis of the above embodiment, in the present embodiment, the photographing assembly 1 includes: the device comprises a mounting frame 11, a fixing seat 15 and a base 10, wherein the fixing seat 15 is fixed on two sides of the mounting frame 11; the base 10 is movably connected with the fixed seat 15, the fixed seat 15 rotates relative to the base 10, and the mounting frame 11 is connected with the camera 12 through the mounting seat 14.

Specifically, the camera 12 is fixed on the mounting frame 11 through the mounting seat 14, so that the camera 12 is firm and stable and the precision is not affected by factors such as shaking. The mounting frame 11 is connected to the base 10 through a fixing seat 15, wherein the fixing seat 15 and the base 10 can be fixedly connected; the fixing seat 15 and the base 10 can be further rotatably connected to adjust the angle of the camera 12, different screw hole sites are arranged on the base 10, the base 10 and the fixing seat 15 are fixed by screws, and the shooting angle of the camera 12 can be adjusted by fixing screws on the different screw hole sites. In order to adjust the field of view of the camera 12, a rail groove 110 is formed in the mounting frame 11, so that the mounting seat 14 moves and is held in the rail groove 110, and the mounting seat 14 is slidably connected with the mounting frame 11: as shown in fig. 1, the track groove 110 may be opened along the length extension direction of the mounting frame 11, and the mounting seat 14 can adjust the left and right visual field range of the camera 12 when moving in the track groove 110; the track groove 110 may also be formed along the width extension direction of the mounting frame 11, and the mount 14 may adjust the front-rear view range of the camera 12 when moving in the track groove 110. The mounting frame 11 is provided with a plurality of holes with different positions, and the camera 12 is fixed by tightening screws on the mounting frame 14 after the mounting frame 14 moves to a proper position.

Further, the shooting assembly 1 further comprises a protective cover 13, wherein after the protective cover 13 is sleeved on the surface of the camera 12, a connecting plate at one end of the protective cover 13 is connected with the mounting seat 14 in a manner that the connecting plate is connected with the mounting seat 14 through bolts; the mounting seat 14 may be provided with a clamping groove, and the connecting plate is clamped with the mounting seat 14 in various connection modes, which are not described in detail herein. The wall surface of the protective cover 13 at the front end of the camera head of the camera 12 is made of transparent material, and the rest wall surfaces can be made of transparent material, or can be made of stainless steel or other materials, wherein the transparent material can be high-transparency plexiglass. The purpose of this arrangement is to protect the camera 12 from malfunction by others without affecting the photographing effect of the camera 12.

In summary, according to the visual imaging calibration device, the calibration sheet 31 with a fixed size is connected with the roller 30, the camera 12 can shoot the image of the calibration sheet 31 at the same time in the working process, the roller 30 is not required to be stopped in the shooting process, and the camera 12 is directly uploaded to the upper computer component by connecting the camera 12 with the upper computer component in a communication manner, the upper computer component generates the adjustment parameters of the camera 12 after the calibration sheet 31 is processed, and carries out parameter adjustment on the camera 12.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present utility model, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A visual imaging calibration apparatus, comprising:

a material carrier assembly (3), wherein the material carrier assembly (3) comprises a roller (30) and a calibration sheet (31), and the calibration sheet (31) is fixed on the surface of the roller (30);

the shooting assembly (1), the shooting assembly (1) comprises a camera (12), the roller (30) is positioned at one side of the camera (12) and is positioned in the shooting range of the camera (12), and the camera (12) is used for collecting the image of the calibration sheet (31) and sending the image of the calibration sheet (31) to the upper computer assembly;

the upper computer component is in communication connection with the camera (12), and is used for receiving and analyzing the image data of the standard piece (31) and adjusting the camera precision according to the comparison result of the image data and preset data;

the photographing assembly (1) includes:

the camera comprises a mounting frame (11), wherein the mounting frame (11) is connected with a camera (12) through a mounting seat (14);

the fixing seats (15), wherein the fixing seats (15) are fixed on two sides of the mounting frame (11);

the base (10), base (10) and fixing base (15) swing joint, fixing base (15) rotate for base (10).

2. The visual imaging calibration apparatus of claim 1, wherein:

the mounting frame (11) is provided with a track groove (110), and the mounting seat (14) moves and is kept in the track groove (110).

3. The visual imaging calibration apparatus of claim 1, wherein the camera assembly (1) further comprises:

the protection cover (13), the protection cover (13) is sleeved on the surface of the camera (12) and is connected with the mounting seat (14).

4. The visual imaging calibration apparatus of claim 1, further comprising:

the polishing assembly (2), the polishing assembly (2) comprises a light source body (21) and a light source controller connected with the light source body (21), the light source controller is electrically connected with the upper computer assembly, and the roller (30) is positioned on one side of the light source body (21) and in the light source irradiation range of the light source body (21).

5. The visual imaging calibration apparatus of claim 4, wherein: the polishing assembly (2) further comprises an adjusting bracket (20), the adjusting bracket (20) comprises a base (200), a supporting piece (201) and a connecting piece (202), the end part of the supporting piece (201) is connected with the base (200), the connecting piece (202) is movably arranged on the supporting piece (201), and the light source body (21) is connected with the adjusting bracket (20) through the connecting piece (202).

6. The visual imaging calibration apparatus of claim 1, wherein: an encoder is arranged on the roller (30), and the encoder is electrically connected with the camera (12).

7. The visual imaging calibration apparatus of claim 1, wherein:

the upper computer assembly comprises an industrial personal computer and a display, the industrial personal computer is connected with the camera (12) and the display, and is used for receiving and analyzing the image data of the image of the standard sheet (31) and transmitting the image data to the display for displaying.

8. The visual imaging calibration apparatus of claim 1, wherein: the visual imaging calibration device further comprises an alarm assembly, and the alarm assembly is connected with the upper computer assembly.

9. The visual imaging calibration apparatus of claim 1, wherein:

the calibration sheet (31) is rectangular, the calibration sheet (31) comprises a plurality of chessboards, and two adjacent chessboards are different in color.