CN117381539A - Pole piece cutting position determining method and device and electronic equipment - Google Patents
Pole piece cutting position determining method and device and electronic equipment Download PDFInfo
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Abstract
The embodiment of the application provides a method and a device for determining a pole piece cutting position and electronic equipment, wherein the method comprises the following steps: acquiring a first pulse number recorded by a preset encoder when the tab cutting equipment cuts a target tab of a target pole piece; responding to the image acquisition equipment to acquire an image, and acquiring a second pulse number of a preset coder when the image acquisition equipment acquires the image; determining the number of pulse signals received by a preset encoder in the process of cutting the target tab by the tab cutting equipment to the target tab through the target tab feeding through the image acquisition equipment as the remaining number of pulses according to the first number of pulses, the second number of pulses and the camera number of pulses; if the residual pulse number meets the preset pulse number condition, determining the position of the tab of the target tab in the target tab image; and determining the cutting position of the pole piece according to the position of the pole lug. Therefore, the accuracy of pole piece cutting is improved.
Description
Technical Field
The application relates to the technical field of machine vision, in particular to a pole piece cutting position determining method and device and electronic equipment.
Background
In the production of more accurate products, it is often necessary to use die cut sheeting processes, for example where the pole pieces are an important component, and where the pole pieces are typically formed by die cut sheeting. In the conventional die cutting and sheet making process, a pole piece is firstly manufactured by cutting out pole piece material side lugs through laser, then the pole piece is subjected to a plurality of camera photos, multi-dimensional information of the pole piece is recorded, and when an electrode represented by the multi-dimensional information meets the condition of becoming one battery cell, the information is sent to cutting equipment for subsequent core forming process. In this process, judging whether the multidimensional information of the pole piece meets the condition of becoming the battery cell is focused on the accuracy of positioning the target tab in the multidimensional information, and because the cutting position of the pole piece is determined according to the position of the target tab, if the target tab on the pole piece is not positioned or positioned by mistake, the cutting position of the pole piece is not judged or judged by mistake, and then pole piece materials are stacked, so that the core cannot be formed later or the pole piece is formed into a core too early, and the production loss is caused.
The method generally relies on an image processing method in machine vision to position a target tab on a pole piece, and needs to punch Mark holes on the target tab on materials in advance, then detect the Mark holes on a shot image in an image processing mode, further position the target tab according to the detected Mark holes, and cut the pole piece according to the target tab. However, due to factors such as punching quality, mechanical jitter in the pole piece conveying process, uneven visual algorithm level of visual algorithm engineers and the like, missed judgment and misjudgment of the target pole lug position are often caused by the method, and therefore, a method for reducing the missed judgment and misjudgment of the pole piece cutting position and causing inaccurate pole piece cutting is lacked in the related technology.
Disclosure of Invention
The embodiment of the application aims to provide a pole piece cutting position determining method and device and electronic equipment, so as to improve the accuracy of pole piece cutting. The specific technical scheme is as follows:
according to a first aspect of the present application, there is provided a pole piece cutting position determining method, the method comprising:
acquiring a first pulse number recorded by a preset encoder when the tab cutting equipment cuts a target tab of a target pole piece, wherein the preset encoder is used for receiving pulse signals and recording the total number of the received pulse signals;
responding to an image acquisition device to acquire an image, and acquiring a second pulse number of the preset encoder when the image acquisition device acquires the image, wherein the image acquisition device and the tab cutting device are arranged on the same assembly line, and the image acquisition device is positioned at the downstream of the tab cutting device;
determining the number of pulse signals received by the preset encoder in the process of cutting the target tab by the tab cutting device to the target tab by the target tab feeding through the image acquisition device according to the first pulse number, the second pulse number and the camera pulse number, wherein the camera pulse number is the total pulse number of pulse signals counted in the process of transmitting the distance from the position of the tab cutting device to the position of the image acquisition device by the assembly line;
If the residual pulse number meets a preset pulse number condition, determining the position of a tab where the target tab is located in a target tab image, wherein the target tab image is the image of the target tab which is acquired by the image acquisition equipment recently;
and determining the cutting position of the pole piece according to the position of the pole lug.
In one possible embodiment, the determining, in the target pole piece image, the pole ear position where the target pole ear is located includes:
according to the residual pulse number, the image row of the image acquisition equipment and the target pole piece image with the target pole lug in the pulse row prediction image, the pulse row is used for representing the image row of the pole piece image passing in one pulse time;
and determining the position of the tab of the target tab in the target tab image according to the first pulse number, the image row of the image acquisition equipment and the pulse row.
In a possible embodiment, the determining, according to the first pulse number, the image line height of the image capturing device and the pulse line height, the tab position where the target tab is located in the target tab image includes:
Predicting the predicted position of the target tab in the target pole piece image according to the first pulse number, the image line height of the image acquisition equipment and the pulse line height, and performing image processing on the target pole piece image;
if the result of image processing indicates that the target tab exists in the target pole piece image and the difference between the identification position of the target tab in the result of image processing and the prediction position meets a preset distance condition, determining the identification position as the tab position of the target tab in the target pole piece image.
In a possible embodiment, the determining, according to the first pulse number, the image line height of the image capturing device and the pulse line height, the tab position where the target tab is located in the target tab image includes:
predicting the predicted position of the target tab in the target pole piece image according to the first pulse number, the image line height of the image acquisition equipment and the pulse line height, and performing image processing on the target pole piece image;
and if the result of image processing indicates that the target tab does not exist in the target tab image, or if the difference between the identification position of the target tab in the result of image processing and the prediction position does not meet a preset distance condition, taking the prediction position as the tab position of the target tab in the target tab image.
In a possible embodiment, the image capturing device is a plurality of image capturing devices, and the method further includes:
determining pole piece data of a to-be-cut battery cell based on the target pole piece image and each image data acquired by the image acquisition equipment before the target pole piece image;
and synchronizing the pole piece data of the battery cells to be cut, which are determined by the image acquisition equipment.
According to a second aspect of the present application, there is also provided a pole piece cutting position determining device, the device comprising:
the first pulse determining module is used for obtaining a first pulse number recorded by a preset encoder when the tab cutting equipment cuts a target tab of the target pole piece, and the preset encoder is used for receiving pulse signals and recording the total number of the received pulse signals;
the second pulse determining module is used for responding to the image acquisition equipment to acquire an image, and acquiring a second pulse number of the preset encoder when the image acquisition equipment acquires the image, wherein the image acquisition equipment and the tab cutting equipment are arranged on the same assembly line, and the image acquisition equipment is positioned at the downstream of the tab cutting equipment;
the residual pulse determining module is used for determining the number of pulse signals received by the preset encoder in the process that the electrode tab cutting equipment cuts the target electrode tab to the target electrode tab travel material is acquired by the image acquisition equipment according to the first pulse number, the second pulse number and the camera pulse number, wherein the camera pulse number is the total pulse number of pulse signals counted in the process that the pipeline transmits the distance from the position of the electrode tab cutting equipment to the position of the image acquisition equipment;
The tab position determining module is used for determining the tab position of the target tab in a target electrode sheet image if the residual pulse number meets a preset pulse number condition, wherein the target electrode sheet image is the image of the target electrode sheet which is acquired by the image acquisition equipment recently;
and the cutting position determining module is used for determining the cutting position of the pole piece according to the position of the pole lug.
In one possible embodiment, the tab position determining module includes:
the pole piece determining submodule is used for predicting a target pole piece image with the target pole lug in the image according to the residual pulse number, the image row of the image acquisition equipment and the pulse row, and the pulse row is used for representing the image row of the pole piece image passing in one pulse time;
and the tab determination submodule is used for determining the tab position of the target tab in the target pole piece image according to the first pulse number, the image row height of the image acquisition equipment and the pulse row height.
In one possible embodiment, the tab determination submodule includes:
the first prediction unit is used for predicting the predicted position of the target tab in the target pole piece image according to the first pulse number, the image height of the image acquisition equipment and the pulse height, and performing image processing on the target pole piece image;
The first tab determining unit is configured to determine, if the result of image processing indicates that the target tab exists in the target pole piece image and a difference between an identification position of the target tab in the result of image processing and the predicted position meets a preset distance condition, the identification position as a tab position where the target tab is located in the target pole piece image.
In one possible embodiment, the tab determination submodule includes:
the second prediction unit is used for predicting the predicted position of the target tab in the target pole piece image according to the first pulse number, the image height of the image acquisition equipment and the pulse height, and performing image processing on the target pole piece image;
and the second tab position determining unit is used for taking the predicted position as the tab position of the target tab in the target tab image if the result of image processing indicates that the target tab does not exist in the target tab image or if the difference between the identification position of the target tab in the result of image processing and the predicted position does not meet the preset distance condition.
In a possible embodiment, the image acquisition device is a plurality of, the apparatus further includes:
The pole piece packaging module is used for determining pole piece data of the battery cell to be cut based on the target pole piece image and each image data acquired by the image acquisition equipment before the target pole piece image;
and the data synchronization module synchronizes the pole piece data of the to-be-cut battery cell determined by each image acquisition device.
According to a third aspect of the present application, there is also provided an electronic device comprising:
a memory for storing a computer program;
a processor configured to implement the method of any one of the first aspects when executing a program stored on a memory.
According to a fourth aspect of the present application, there is also provided a computer readable storage medium having stored therein a computer program which, when executed by a processor, implements the method of any of the first aspects.
Embodiments of the present application also provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the above-described first aspects.
The beneficial effects of the embodiment of the application are that:
according to the pole piece cutting position determining method, the pole piece cutting position determining device and the electronic equipment, the first pulse number when the target pole lug is cut, the second pulse number when the image acquisition equipment acquires images and the camera pulse number representing the distance between the pole lug cutting equipment and the image acquisition equipment are determined through the preset encoder, the residual pulse number of the distance between the target pole lug and the image acquisition equipment is obtained through calculation, the distance between the target pole lug and the image acquisition equipment is judged based on the residual pulse number, the target pole piece image containing the target pole lug and the position of the target pole lug in the target pole piece image are determined according to the preset pulse number conditions, and then the cutting position is obtained according to the pole lug position. The target pole piece image containing the target pole lug is presumed by statistics of the pulse signals, so that the cutting position is determined, mark holes do not need to be punched, visual positioning is not relied on, the condition that the cutting position is positioned inaccurately due to missed judgment and misjudgment of the target pole lug, which are easily caused by image processing, is reduced, and the accuracy of pole piece cutting is improved.
Of course, not all of the above-described advantages need be achieved simultaneously in practicing any one of the products or methods of the present application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly introduce the drawings that are required to be used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other embodiments may also be obtained according to these drawings to those skilled in the art.
Fig. 1a is a schematic flow chart of a method for determining a cutting position of a pole piece according to an embodiment of the present application;
fig. 1b is a schematic structural diagram of tab distribution on a pole piece according to an embodiment of the present application;
fig. 1c is a schematic distribution diagram of a tab cutting device and an image acquisition device corresponding to a pole piece cutting position determining method provided in an embodiment of the present application;
fig. 2 is a flow chart of another method for determining a cutting position of a pole piece according to an embodiment of the present application;
fig. 3 is a flowchart of another method for determining a cutting position of a pole piece according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a pole piece cutting position determining device according to an embodiment of the present application;
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
For a clearer description of the content of the present application, the following are relevant explanations of the technical terms referred to in the present application:
pole piece material: the special material with the side edges containing the metal edges is divided into a cathode and an anode, and is stored like roll paper after being manufactured, and the unwinding length of one roll of sheet material is usually hundreds of meters;
a diaphragm: an insulating material;
the die cutting process comprises the following steps: the process of cutting the metal area on the side edge of the pole piece material into rectangular-like pole lugs is that the pole piece is called after the material is die-cut, and the pole piece material is subjected to a core forming process after the die-cutting process;
and (3) core forming process: a process for combining the pole piece and the diaphragm to prepare a battery cell;
and (3) an electric core: the material is formed by combining a pole piece and a diaphragm;
tab: the quasi-rectangular metal sheet on the side edge of the pole piece is manufactured by a die cutting process;
head tab: a first tab on one cell;
tail tab: a last tab on one cell;
mark hole: marking holes cut on the tail electrode lugs are commonly used for visually positioning the tail parts of the electric cores;
cutting position: in the core forming process, the position for actually dividing the battery core is between the tail electrode lug and the head electrode lug of the next battery core;
Dividing EA: the length of one cell is far smaller than that of one roll of pole piece, so that the head and tail parts of the cell are required to be distinguished by utilizing cutting positions in a core forming process, and the process is called as EA separation;
winding: a core forming process is to roll a cathode plate and a diaphragm together to manufacture an electric core;
lamination: a core forming process is to stack a cathode plate and a diaphragm together to manufacture an electric core;
an encoder: and the electric appliance can convert the rotating speed of the shaft into pulse output with a certain frequency.
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. Based on the embodiments herein, a person of ordinary skill in the art would be able to obtain all other embodiments based on the disclosure herein, which are within the scope of the disclosure herein.
As described above, in the related art, a situation that a false miss judgment may occur on a cutting position of a pole piece is provided, and based on this, the application provides a method for determining the cutting position of the pole piece, as shown in fig. 1a, where the method includes:
s101, acquiring a first pulse number recorded by a preset encoder when the tab cutting equipment cuts a target tab of the target pole piece.
S102, responding to the image acquisition device to acquire the image, and acquiring a second pulse number of a preset coder when the image acquisition device acquires the image.
S103, determining the number of pulse signals received by a preset encoder in the process that the electrode tab cutting equipment cuts the target electrode tab until the target electrode tab feeding is acquired by the image acquisition equipment according to the first pulse number, the second pulse number and the camera pulse number, and taking the number of pulse signals as the remaining pulse number.
S104, if the residual pulse number meets the preset pulse number condition, determining the tab position of the target tab in the target tab image.
S105, determining the cutting position of the pole piece according to the position of the pole lug.
Wherein, in S101, the preset encoder is configured to receive the pulse signals and record the total number of the received pulse signals.
The pulse signals are continuously transmitted along with the process of transmitting the pole pieces by the assembly line, the preset encoder continuously receives the pulse signals and counts, and specifically, when the pole ear cutting equipment cuts the target pole ears of the target pole pieces, the first pulse number counted by the preset encoder is read. The tab cutting device is used for cutting the head tab and the tail tab on the target pole piece, and the tab cutting device can be a laser device or other precise cutting devices, and is not limited in the application. The target pole piece can be any pole piece which needs to be made into an electric core, and a plurality of pole lugs can be cut out on one target pole piece by the pole lug cutting equipment, wherein the target pole lug can be a head pole lug or a tail pole lug of one target pole piece. It can be understood that the first tab is the first tab on the battery cell obtained by cutting the target pole piece, the tail tab is the last tab on the battery cell obtained by cutting the target pole piece, as shown in fig. 1b, the cutting positions are between the first tab and the tail tab of the adjacent battery cell, see fig. 1b, the battery cell 1 and the battery cell 2 are adjacent battery cells, the cutting positions are between the first tab of the battery cell 1 and the tail tab of the battery cell 2, the battery cell 2 and the battery cell 3 are adjacent battery cells, and the cutting positions are between the first tab of the battery cell 2 and the tail tab of the battery cell 3. Therefore, the head tab or the tail tab can be used as the target tab, and the cutting position of each battery cell of the target pole piece is determined according to the position of the head tab or the tail tab of the target pole piece.
In S102, the image capturing device and the tab cutting device are disposed in the same pipeline, and the image capturing device is located downstream of the tab cutting device.
As shown in fig. 1c, the image collecting device and the tab cutting device are both fixed around the assembly line, and the image collecting device is located at the downstream of the tab cutting device, so that after the tab cutting device cuts to form a tab, the image collecting device can only shoot the image of the tab, that is, the images collected by the image collecting device are all the images of the pole piece cut by the tab. The pole pieces which are continuously fed are arranged on the assembly line, cutting positions are arranged between the head pole lug and the tail pole lug on the pole pieces, and the pole pieces between the two adjacent cutting positions can be formed into an electric core subsequently.
When the image acquisition device acquires the image, the number of pulses counted by the preset encoder at the moment is acquired to obtain a second number of pulses, and it can be understood that each image acquisition device periodically acquires the image on the pipeline, so that each time the image acquisition device acquires the image, the execution subject needs to respond to the number of pulses of the preset encoder, acquired by the image acquisition device at the moment, as the second number of pulses, and the number of pulses recorded by the preset encoder is continuously increased along with the distance of the pipeline conveying pole piece, so that the second number of pulses is updated along with the image acquisition device acquiring the image.
In S103, the number of pulses of the camera is the total number of pulses of the pulse signal counted in the distance of the pipeline from the position of the tab cutting device to the position of the image capturing device.
The actual physical distance D of each pulse of the pulse signals can be obtained through calibration, specifically, the physical distance D is the distance passed by a pipeline in the interval between two pulse signals, the distance D from the tab cutting device to the image acquisition device can also be measured, and then the camera pulse number=d/D can be calculated. It can be understood that, as shown in fig. 1c, the tab cutting device cuts the target tab at the position where the tab cutting device is located, and the distance between the tab cutting device and the image capturing device is the number of pulses of the camera, that is, the target tab and the image capturing device need to pass through the number of pulses of the camera. And when the tab cutting device cuts the target tab, the total number of pulse signals is a first pulse number, corresponding to the first image acquisition after the image acquisition device cuts the target tab, and the total number of pulses at the moment is recorded as a second pulse number, so that the difference between the second pulse number and the first pulse number is the pulse number passed from the position of the first image acquisition device to the position of the target tab cut by the tab cutting device.
Therefore, when the image capturing apparatus captures an image for the first time, the target tab needs a plurality of pulses from the image capturing apparatus, specifically, the remaining pulse number=the camera pulse number- (the second pulse number-the first pulse number). If the remaining pulse number is denoted Xr, the camera pulse number is denoted Xt, the second pulse number is denoted X2, and the first pulse number is denoted X1, the remaining pulse number can be calculated as follows:
Xr＝Xt-(X2-X1)
along with the process that the target tab is fed from the tab cutting device to the image acquisition device, the image acquisition device continuously acquires images, the counted second pulse number is also continuously updated, and based on the updated second pulse number, the residual pulse number of the target tab from the image acquisition device is also continuously reduced.
In S104, the target pole piece image is the image of the target pole piece that is acquired by the image acquisition device.
The residual pulse number represents the distance between the target tab and the visual field edge of the image acquisition device, when the target tab is closer to the image acquisition device, the image acquisition device is more likely to acquire a target tab image containing the target tab, the preset pulse number condition limits the approaching degree of the image acquisition device and the target tab, under the condition that the preset pulse number condition is met, the image acquired by the image acquisition device at the moment can be presumed to contain the target tab, the tab position can be predicted according to the relation between the image height and pulse statistics when the tab position is determined in the target tab image, and the tab position of the target tab can be determined by identifying the target tab in the target tab image through an image identification algorithm.
Specifically, the method for determining the tab position of the target tab in the target tab image comprises the following steps:
s1041, predicting a target pole piece image with a target pole lug in the image according to the residual pulse number, the image line height of the image acquisition device and the pulse line height.
S1042, determining the position of the target tab in the target tab image according to the first pulse number, the image line height and the pulse line height of the image acquisition device.
In S1041, the pulse line is used to represent the image line where the pole piece image passes within one pulse time.
The pixel row of the image row is perpendicular to the feeding direction of the target pole piece, the image row is the total pixel row in the perpendicular direction, and the pulse row is the pixel row through which the image acquired by the pulse signal on the pipeline in one pulse time passes, and the unit is row/pulse. For convenience of description, the image line height is set to be H, the pulse line height is set to be H, and the remaining pulse number is denoted as Xr, and it can be understood that xr×h is the image line height through which the pulse with the remaining pulse number can pass, and further the result of xr×h/H is the number of images through which the remaining pulse number can pass, that is, the target tab and the image acquisition device need to shoot xr×h/H images, so that the shooting range of the image acquisition device can be reached, that is, the image acquisition device needs to shoot xr×h/H images, and then the target pole piece image can be obtained.
In S1042, the target tab is included in the target pole piece image, and specifically how to determine the tab position in the target pole piece image according to the first pulse number, the image line height and the pulse line height of the image acquisition device will be described below, which is not repeated here.
According to the embodiment, according to the image height and the pulse height acquired by the image acquisition equipment, the number of the residual pulses is determined, namely, the number of the images acquired by the image acquisition equipment is determined, the target tab can be acquired after the number of the images acquired by the image acquisition equipment is determined, the tab position of the target tab in the target tab image is determined, the position of the target tab can be estimated by counting pulse signals, the cutting position is determined subsequently, mark holes do not need to be punched on the basis of reducing the condition that the cutting position is positioned inaccurately due to misjudgment of the target tab, which is easy to cause by image processing, and the efficiency of determining the cutting position of the pole piece is improved.
If the lug position of the target lug is calculated by counting pulse signals only, inaccuracy of the lug position due to the counting error of the pulse signals may occur, therefore, the present application further provides a method for determining the lug position, including:
S1042a, predicting the predicted position of a target tab in a target pole piece image according to the first pulse number, the image line height of the image acquisition equipment and the pulse line height, and performing image processing on the target pole piece image;
s1042b, if the result of the image processing indicates that the target tab exists in the target pole piece image, and the difference between the identification position and the prediction position of the target tab in the result of the image processing satisfies the preset distance condition, determining the identification position as the tab position of the target tab in the target pole piece image.
In S1042a, for convenience of description, the result of xr×h/H is set to M, that is, m=xr×h/H, and M is not necessarily an integer, so the integer bit of M is set to M1, and the remainder bit of M is set to P1. M1 represents the height of the target tab after the image acquisition device acquires M1 images again in the images (target pole piece images) acquired by the image acquisition device, wherein P1 represents the height of the target tab after the image acquisition device acquires M1 images, namely the height of the target tab in the target pole piece images, namely the predicted position. Since the remaining pulse number Xr is updated continuously along with the image collected by the image collecting device, M1 and P1 obtained by calculating Xr are updated along with the image collected by the image collecting device, M1 becomes smaller and smaller, the distance between the image collecting device and the target tab is smaller and smaller, the statistics of the second pulse number is more accurate, and further P1 is more accurate and more accurate due to the fact that the distance between the target tab and the image collecting device is smaller and smaller. When M1 is equal to 0, indicating that the target tab exists in the image acquired by the acquisition image acquisition equipment as a target pole piece image, and taking P1 at the moment as a predicted position of the target tab.
And meanwhile, carrying out image processing on the target pole piece image, specifically detecting whether a target pole lug exists in the target pole piece image, and if so, determining the position of the target pole lug in the target pole piece image.
In S1042b, if the result of the image processing indicates that the target tab exists in the target tab image, determining a difference between the identification position and the predicted position of the target tab in the result of the image processing, specifically, if the distance difference between the identification position and the predicted position satisfies a preset distance condition, taking the identification position as the tab position of the target tab. The preset distance condition is used for limiting the difference between the identification position and the predicted position, and the smaller the difference between the identification position and the predicted position is, the easier the preset distance condition is satisfied, and the preset distance condition can be set according to experience of a person skilled in the art or according to requirements, and the application is not limited. As one example, the preset distance condition may be that the distance between the identified location and the preset location is less than a preset threshold. It can be understood that the smaller the difference between the identification position and the predicted position, the higher the accuracy of the identification position in the result of the image processing is, and therefore, in the case where the difference between the identification position and the predicted position satisfies the preset distance condition, the identification position can be taken as the tab position of the target tab in the target pole piece.
According to the embodiment, not only is the predicted position of the target tab estimated through statistics of pulse signals, but also the identification position of the target tab is identified through image processing, the two positions are compared, the accurate tab position of the target tab is determined, the tab position is determined through a double method, and the accuracy of the tab position is further improved, so that the accuracy of the cutting position is improved.
Because the mechanical jitter or the algorithm of visual engineering in the pole piece material conveying process are staggered, the result of image processing after image processing is performed on the target pole piece image may not coincide with the predicted position of the estimated target pole lug, and based on the result, the application also provides a pole lug position determining method, which comprises the following steps:
s1042c, predicting the predicted position of the target tab in the target pole piece image according to the first pulse number, the image line height of the image acquisition device and the pulse line height, and performing image processing on the target pole piece image.
And S1042d, if the result of the image processing indicates that the target tab does not exist in the target tab image, or if the difference between the identification position of the target tab in the result of the image processing and the prediction position does not meet the preset distance condition, taking the prediction position as the tab position of the target tab in the target tab image.
In S1042c, the step is the same as S1042a, and specific reference can be made to the related description of S1042a, which is not repeated here.
In S1042d, if the result of the image processing indicates that the target tab does not exist in the target tab image, it is indicated that the image acquisition device may be abnormal or the image recognition of the target tab image may be problematic when the image acquisition device acquires the image, and in order to avoid the false omission of the tab position, the calculated predicted position is taken as the tab position of the target tab. If the result of the image processing indicates that the target tab exists in the target tab image, but the difference between the identification of the target tab and the predicted position is large, and the preset distance condition is not satisfied, the result indicates that the target tab image calculated by counting the pulse number is correct, and the accuracy of the predicted position calculated by counting the pulse number is higher, so that the predicted position is taken as the tab position of the target tab at the moment.
According to the embodiment, under the condition that the result of image processing is not consistent with the predicted position calculated by counting the pulse number, a more accurate predicted position is selected as the tab position of the target tab, so that errors caused by the tab positioning mode purely according to the image processing are reduced, the accuracy of the tab position is further improved, and the accuracy of the cutting position is further improved.
In S105, as described above, the cutting position of the pole piece is near the target tab, so that the cutting position of the pole piece is obtained based on the position of the target tab determined in the target pole piece image, specifically, since the offset between the target tab and the cutting position is fixed, the cutting position is obtained by adding the fixed offset to the position of the target tab.
The method comprises the steps of selecting the embodiment, determining a first pulse number when a target tab is cut, a second pulse number when an image acquisition device acquires an image and a camera pulse number representing the distance between the tab cutting device and the image acquisition device by using a preset encoder, calculating to obtain the residual pulse number of the distance between the target tab and the image acquisition device, judging the distance between the target tab and the image acquisition device based on the residual pulse number, determining a target tab image containing the target tab and the position of the target tab in the target tab image according to a preset pulse number condition, and further obtaining the cutting position according to the tab position. The target pole piece image containing the target pole lug is presumed by statistics of the pulse signals, so that the cutting position is determined, mark holes do not need to be punched, visual positioning is not relied on, the condition that the cutting position is positioned inaccurately due to missed judgment and misjudgment of the target pole lug, which are easily caused by image processing, is reduced, and the accuracy of pole piece cutting is improved.
In order to improve the quality of pole piece cutting and reduce the situation of misjudging the cutting position, a plurality of image acquisition devices are arranged on a production line, and based on the method, the application also provides a pole piece cutting position determining method, and the number of the image acquisition devices is multiple, as shown in fig. 2, and the method comprises the following steps:
s201, acquiring a first pulse number recorded by a preset encoder when the tab cutting equipment cuts a target tab of the target pole piece.
S202, responding to the image acquisition device to acquire the image, and acquiring a second pulse number of a preset coder when the image acquisition device acquires the image.
S203, determining the number of pulse signals received by a preset encoder in the process that the electrode tab cutting equipment cuts the target electrode tab until the target electrode tab is acquired by the image acquisition equipment according to the first pulse number, the second pulse number and the camera pulse number, and taking the number as the remaining pulse number.
S204, if the residual pulse number meets the preset pulse number condition, determining the tab position of the target tab in the target tab image.
S205, determining pole piece data of the battery cell to be cut based on the target pole piece image and each image data acquired by the image acquisition equipment before the target pole piece image.
S206, synchronizing the pole piece data of the battery cells to be cut, which are determined by the image acquisition equipment.
In S201, this step is the same as S101, and specific reference may be made to the description related to S101, which is not repeated here.
In S202, the step is the same as S102, and specific reference may be made to the description related to S102, which is not repeated here.
In S203, this step is the same as S103, and specific reference may be made to the description related to S103, which is not repeated here.
In S204, the step is the same as S104, and specific reference may be made to the description related to S104, which is not repeated here.
In S205, there are a plurality of image capturing devices, and for each image capturing device, the present application obtains the second pulse number corresponding to each image capturing device, and determines the target pole piece image corresponding to each image capturing device and the pole ear position of the target pole ear in the target pole piece image. Therefore, each image acquisition device can consider the target electrode plate image and each image data acquired before the target electrode plate image as the image data of the to-be-cut battery cell, and based on the image data, the relevant information of the electrode plate in the to-be-cut battery cell can be determined, including measurement data of the electrode plate, information for representing defects existing in the electrode plate and the like, and the relevant information is called as the electrode plate data of the to-be-cut battery cell.
In S206, as described above, in the method for determining a cutting position of a pole piece, each image acquisition device can determine a cutting position in a shot image, so each image acquisition device can accurately distinguish different pole pieces, and because each image acquisition device determines the cutting position based on the pulse number of a preset encoder, each image acquisition device can be regarded as distinguishing different pole pieces based on the same reference, each image acquisition device can accurately distinguish different pole pieces, and can also enable pole pieces distinguished by each image acquisition device to keep synchronous, i.e. can keep synchronous and accurate of pole piece data, so pole piece data determined by each image acquisition device can be packaged and sent to a designated device, so that related personnel can master related information of each pole piece according to the information, and therefore, the cell production process can be managed more effectively, and the quality of a produced cell can be improved.
For example, assuming that there are 5 image capturing devices, respectively denoted as image capturing devices 0-4, where the image capturing device 0 is farthest from the cropping device, the image capturing device 1-4 synchronizes the pole piece data obtained by determination to the image capturing device 0, and the image capturing device 0 integrates the pole piece data obtained by determination of each image capturing device, because in the embodiment of the present application, synchronization and precision of the pole piece data can be maintained, the integrated pole piece data can accurately reflect the actual situation of each pole piece, so that a related person can master the situation of the pole piece according to the pole piece data integrated by the image capturing device 0. If the synchronization and the precision of the pole piece data cannot be maintained, the integrated pole piece data may be disordered and/or inaccurate, so that the real situation of each pole piece cannot be accurately reflected, and the embodiment of the application can solve the technical problem.
In order to more clearly describe the pole piece cutting position determining method provided in the embodiment of the present application, a specific implementation manner will be described below, and the flow chart is shown in fig. 3:
firstly, in a calibration link, calibrating the distance D between the tab cutting equipment and the image acquisition equipment in advance, calibrating the actual physical distance D (mm/pulse) corresponding to the pulse signal, calibrating the image height H corresponding to the pulse signal, calibrating the total image height H of the acquired image, and calculating the required pulse number Xt between the tab cutting equipment and the image acquisition equipment according to D and D.
And then, starting a link of cutting the target tab at the tab cutting equipment:
s301, cutting a target tab by using a tab cutting device.
S302, a first pulse number X1 counted by a preset encoder at the moment is obtained.
S303, the image acquisition device acquires an image for the first time.
S304, acquiring a second pulse number X2 counted by a current preset encoder in response to the image acquisition device acquiring an image.
S305, the remaining pulse number Xr, xr=xt- (X2-X1) is calculated.
S306, predicting a target pole piece image and a predicted position P1 of a target pole lug according to Xr, H and H, wherein Xr is H/H=M … P1.
S307, the predicted position P1 is updated.
S308, whether M1 is 0 is detected, and if M1 is not 0, the process returns to S304.
S309, if M1 is 0, determining the currently acquired image as the target pole piece image, and performing image processing on the target pole piece image to obtain a processing result.
And S310, if the processing result shows that the target tab does not exist, taking the predicted position as the tab position of the target tab.
S311, if the processing result shows that the target tab exists, determining whether the identification position and the predicted position meet the preset distance condition.
S312, if the identification position and the predicted position are determined not to meet the preset distance condition, the predicted position is taken as the tab position of the target tab.
And S313, if the identification position and the predicted position meet the preset distance condition, taking the identification position as the tab position of the target tab.
S314, determining a cutting position according to the tab position, and cutting the target pole piece.
Corresponding to the pole piece cutting position determining method provided by the application, the application also provides a pole piece cutting position determining device, as shown in fig. 4, the device comprises:
a first pulse determining module 401, configured to obtain a first pulse number recorded by a preset encoder when the tab cutting device cuts a target tab of the target pole piece, where the preset encoder is configured to receive pulse signals and record a total number of the received pulse signals;
A second pulse determining module 402, configured to, in response to the image acquisition device acquiring an image, preset a second pulse number of the encoder when the image acquisition device acquires the image, where the image acquisition device and the tab cutting device are disposed in the same pipeline, and the image acquisition device is located downstream of the tab cutting device;
the remaining pulse determining module 403 is configured to determine, according to the first pulse number, the second pulse number, and the camera pulse number, the number of pulse signals received by the preset encoder in a process that the tab cutting device cuts the target tab to the target tab is collected by the image collecting device, as the remaining pulse number, where the camera pulse number is the total pulse number of pulse signals counted in a distance process that the assembly line transmits from the position of the tab cutting device to the position of the image collecting device;
the tab position determining module 404 is configured to determine, in a target pole piece image, a tab position where a target tab is located if the number of remaining pulses satisfies a preset number of pulses condition, where the target pole piece image is an image of a target pole piece that is acquired by the image acquisition device recently;
and the cutting position determining module 405 is configured to determine a cutting position of the pole piece according to the tab position.
In one possible embodiment, the tab position determination module 404 includes:
the pole piece determining submodule is used for predicting a target pole piece image with a target pole lug in the image according to the residual pulse number, the image row of the image acquisition equipment and the pulse row, wherein the pulse row is used for representing the image row of the pole piece image passing in one pulse time;
the tab determination submodule is used for determining the tab position of the target tab in the target pole piece image according to the first pulse number, the image row height and the pulse row height of the image acquisition equipment.
In one possible embodiment, the tab determination sub-module includes:
the first prediction unit is used for predicting the predicted position of the target tab in the target pole piece image according to the first pulse number, the image line height of the image acquisition equipment and the pulse line height, and performing image processing on the target pole piece image;
the first tab determining unit is configured to determine the identification position as a tab position where the target tab is located in the target pole piece image if the result of image processing indicates that the target tab exists in the target pole piece image and a difference between the identification position and the prediction position of the target tab in the result of image processing satisfies a preset distance condition.
In one possible embodiment, the tab determination sub-module includes:
the second prediction unit is used for predicting the predicted position of the target tab in the target pole piece image according to the first pulse number, the image row height of the image acquisition equipment and the pulse row height and performing image processing on the target pole piece image;
and the second lug position determining unit is used for taking the predicted position as the lug position of the target lug in the target pole piece image if the image processing result indicates that the target lug does not exist in the target pole piece image or if the difference between the identification position of the target lug in the image processing result and the predicted position does not meet the preset distance condition.
In one possible embodiment, the image capturing device is plural, and the apparatus further includes:
the pole piece packaging module is used for determining pole piece data of the battery cell to be cut based on the target pole piece image and each image data acquired by the image acquisition equipment before the target pole piece image;
and the data synchronization module synchronizes the pole piece data of the battery cell to be cut, which is determined by each image acquisition device.
The embodiment of the application also provides an electronic device, as shown in fig. 5, including:
a memory 501 for storing a computer program;
The processor 502 is configured to execute the program stored in the memory 501, and implement the following steps:
acquiring a first pulse number recorded by a preset encoder when the tab cutting equipment cuts a target tab of a target pole piece, wherein the preset encoder is used for receiving pulse signals and recording the total number of the received pulse signals;
responding to the image acquisition equipment to acquire an image, and acquiring a second pulse number of a preset encoder when the image acquisition equipment acquires the image, wherein the image acquisition equipment and the tab cutting equipment are arranged on the same assembly line, and the image acquisition equipment is positioned at the downstream of the tab cutting equipment;
determining the number of pulse signals received by a preset encoder in the process that the electrode tab cutting equipment cuts the target electrode tab to the target electrode tab is acquired by the image acquisition equipment according to the first pulse number, the second pulse number and the camera pulse number, wherein the camera pulse number is the total pulse number of pulse signals counted in the process that the assembly line transmits the distance from the position of the electrode tab cutting equipment to the position of the image acquisition equipment;
if the residual pulse number meets the preset pulse number condition, determining the position of the tab of the target tab in the target tab image, wherein the target tab image is the image of the target tab which is acquired by the image acquisition equipment recently;
And determining the cutting position of the pole piece according to the position of the pole lug.
And the electronic device may further comprise a communication bus and/or a communication interface, through which the processor 502, the communication interface, and the memory 501 communicate with each other.
The communication bus mentioned above for the electronic devices may be a peripheral component interconnect standard (Peripheral Component Interconnect, PCI) bus or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, etc. The communication bus may be classified as an address bus, a data bus, a control bus, or the like. For ease of illustration, the figures are shown with only one bold line, but not with only one bus or one type of bus.
The communication interface is used for communication between the electronic device and other devices.
The Memory may include random access Memory (Random Access Memory, RAM) or may include Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the aforementioned processor.
The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but also digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
In yet another embodiment provided herein, there is also provided a computer readable storage medium having stored therein a computer program which when executed by a processor implements the steps of any of the pole piece trimming position determination methods described above.
In yet another embodiment provided herein, there is also provided a computer program product containing instructions that, when run on a computer, cause the computer to perform any of the pole piece trimming position determination methods of the above embodiments.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, tape), an optical medium (e.g., DVD), or a Solid State Disk (SSD), etc.
It is noted that 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.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for apparatus, electronic devices, and computer-readable storage medium embodiments, the description is relatively simple, as it is substantially similar to method embodiments, with reference to the section descriptions of method embodiments being merely illustrative.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. that are within the spirit and principles of the present application are intended to be included within the scope of the present application.
Claims (12)
1. A method for determining a cutting position of a pole piece, the method comprising:
acquiring a first pulse number recorded by a preset encoder when the tab cutting equipment cuts a target tab of a target pole piece, wherein the preset encoder is used for receiving pulse signals and recording the total number of the received pulse signals;
responding to an image acquisition device to acquire an image, and acquiring a second pulse number of the preset encoder when the image acquisition device acquires the image, wherein the image acquisition device and the tab cutting device are arranged on the same assembly line, and the image acquisition device is positioned at the downstream of the tab cutting device;
determining the number of pulse signals received by the preset encoder in the process of cutting the target tab by the tab cutting device to the target tab by the target tab feeding through the image acquisition device according to the first pulse number, the second pulse number and the camera pulse number, wherein the camera pulse number is the total pulse number of pulse signals counted in the process of transmitting the distance from the position of the tab cutting device to the position of the image acquisition device by the assembly line;
If the residual pulse number meets a preset pulse number condition, determining the position of a tab where the target tab is located in a target tab image, wherein the target tab image is the image of the target tab which is acquired by the image acquisition equipment recently;
and determining the cutting position of the pole piece according to the position of the pole lug.
2. The method of claim 1, wherein determining the tab position in which the target tab is located in the target pole piece image comprises:
according to the residual pulse number, the image row of the image acquisition equipment and the target pole piece image with the target pole lug in the pulse row prediction image, the pulse row is used for representing the image row of the pole piece image passing in one pulse time;
and determining the position of the tab of the target tab in the target tab image according to the first pulse number, the image row of the image acquisition equipment and the pulse row.
3. The method of claim 2, wherein determining the tab position of the target tab in the target pole piece image from the first pulse number, the image line height of the image capturing device, and the pulse line height comprises:
Predicting the predicted position of the target tab in the target pole piece image according to the first pulse number, the image line height of the image acquisition equipment and the pulse line height, and performing image processing on the target pole piece image;
if the result of image processing indicates that the target tab exists in the target pole piece image and the difference between the identification position of the target tab in the result of image processing and the prediction position meets a preset distance condition, determining the identification position as the tab position of the target tab in the target pole piece image.
4. The method of claim 2, wherein determining the tab position of the target tab in the target pole piece image from the first pulse number, the image line height of the image capturing device, and the pulse line height comprises:
predicting the predicted position of the target tab in the target pole piece image according to the first pulse number, the image line height of the image acquisition equipment and the pulse line height, and performing image processing on the target pole piece image;
and if the result of image processing indicates that the target tab does not exist in the target tab image, or if the difference between the identification position of the target tab in the result of image processing and the prediction position does not meet a preset distance condition, taking the prediction position as the tab position of the target tab in the target tab image.
5. The method of claim 1, wherein the image acquisition device is a plurality of, the method further comprising:
determining pole piece data of a to-be-cut battery cell based on the target pole piece image and each image data acquired by the image acquisition equipment before the target pole piece image;
and synchronizing the pole piece data of the battery cells to be cut, which are determined by the image acquisition equipment.
6. A pole piece cutting position determining device, the device comprising:
the first pulse determining module is used for obtaining a first pulse number recorded by a preset encoder when the tab cutting equipment cuts a target tab of the target pole piece, and the preset encoder is used for receiving pulse signals and recording the total number of the received pulse signals;
the second pulse determining module is used for responding to the image acquisition equipment to acquire an image, and acquiring a second pulse number of the preset encoder when the image acquisition equipment acquires the image, wherein the image acquisition equipment and the tab cutting equipment are arranged on the same assembly line, and the image acquisition equipment is positioned at the downstream of the tab cutting equipment;
the residual pulse determining module is used for determining the number of pulse signals received by the preset encoder in the process that the electrode tab cutting equipment cuts the target electrode tab to the target electrode tab travel material is acquired by the image acquisition equipment according to the first pulse number, the second pulse number and the camera pulse number, wherein the camera pulse number is the total pulse number of pulse signals counted in the process that the pipeline transmits the distance from the position of the electrode tab cutting equipment to the position of the image acquisition equipment;
The tab position determining module is used for determining the tab position of the target tab in a target electrode sheet image if the residual pulse number meets a preset pulse number condition, wherein the target electrode sheet image is the image of the target electrode sheet which is acquired by the image acquisition equipment recently;
and the cutting position determining module is used for determining the cutting position of the pole piece according to the position of the pole lug.
7. The apparatus of claim 6, wherein the tab position determination module comprises:
the pole piece determining submodule is used for predicting a target pole piece image with the target pole lug in the image according to the residual pulse number, the image row of the image acquisition equipment and the pulse row, and the pulse row is used for representing the image row of the pole piece image passing in one pulse time;
and the tab determination submodule is used for determining the tab position of the target tab in the target pole piece image according to the first pulse number, the image row height of the image acquisition equipment and the pulse row height.
8. The apparatus of claim 7, wherein the tab determination submodule comprises:
the first prediction unit is used for predicting the predicted position of the target tab in the target pole piece image according to the first pulse number, the image height of the image acquisition equipment and the pulse height, and performing image processing on the target pole piece image;
The first tab determining unit is configured to determine, if the result of image processing indicates that the target tab exists in the target pole piece image and a difference between an identification position of the target tab in the result of image processing and the predicted position meets a preset distance condition, the identification position as a tab position where the target tab is located in the target pole piece image.
9. The apparatus of claim 7, wherein the tab determination submodule comprises:
the second prediction unit is used for predicting the predicted position of the target tab in the target pole piece image according to the first pulse number, the image height of the image acquisition equipment and the pulse height, and performing image processing on the target pole piece image;
and the second tab position determining unit is used for taking the predicted position as the tab position of the target tab in the target tab image if the result of image processing indicates that the target tab does not exist in the target tab image or if the difference between the identification position of the target tab in the result of image processing and the predicted position does not meet the preset distance condition.
10. The apparatus of claim 6, wherein the image acquisition device is a plurality of, the apparatus further comprising:
the pole piece packaging module is used for determining pole piece data of the battery cell to be cut based on the target pole piece image and each image data acquired by the image acquisition equipment before the target pole piece image;
and the data synchronization module synchronizes the pole piece data of the to-be-cut battery cell determined by each image acquisition device.
11. An electronic device, comprising:
a memory for storing a computer program;
a processor for implementing the method of any of claims 1-5 when executing a program stored on a memory.
12. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when executed by a processor, implements the method of any of claims 1-5.
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