Method for detecting a material tape, method for slitting a material tape and die-cutting machine

Abstract

The disclosure provides a kind of detection method of material belt, slitting method of material belt and slitting machine, it is related to battery production technical field, at least to solve the problems such as high cost, long processing time, low capacity in related art due to the fact that slitting machine only carries out alarm, or in other battery production equipment, there are inaccurate marking, material waste and other problems.The slitting machine includes a vision detection system for capturing images of the current material belt released by the unwinding mechanism;Slitting mechanism for slitting the current material belt along the length direction of the material belt;Marking mechanism for marking the current material belt based on the received first marking signal in the case where the detection result of the current material belt indicates that the current material belt has defects, the detection result of the current material belt is determined based on the image of the current material belt, and the first marking signal is generated based on the defects of the current material belt, the first distance between the vision detection system and the marking mechanism and the running speed of the slitting machine.

Description

Technical Field

[0001] The present disclosure relates to, but is not limited to, the field of battery production technology, and in particular to a material strip detection method, a material strip slitting method, and a slitting machine. Background Art

[0002] In related technologies, during the battery production process, a visual acquisition system is usually used to detect defects in the material strip (for example, metal leakage, cracking, etc.). Once a defect is detected, the slitting machine only issues an alarm and is manually processed online, which results in high labor costs, long processing time, and low production capacity. Alternatively, defect marking is performed in other battery production equipment, which results in inaccurate marking positions and material waste. Summary of the Invention

[0003] The embodiments of the present disclosure provide a material strip detection method, a material strip slitting method, and a slitting machine.

[0004] The technical solution of the embodiment of the present disclosure is implemented as follows:

[0005] An embodiment of the present disclosure provides a slitting machine, comprising an unwinding mechanism, a visual inspection system, a marking mechanism, and a rewinding mechanism sequentially arranged along a conveying direction of a material strip, the slitting machine further comprising a slitting mechanism located between the unwinding mechanism and the marking mechanism, wherein:

[0006] The unwinding mechanism is used to release the material strip;

[0007] The visual inspection system is used to collect an image of the current material strip released by the unwinding mechanism;

[0008] The slitting mechanism is used to slit the current material strip along the length direction of the material strip;

[0009] The marking mechanism is configured to mark the current material strip based on a received first marking signal when an inspection result of the current material strip indicates that the current material strip has a defect, the inspection result of the current material strip being determined based on an image of the current material strip, the first marking signal being generated based on the defect of the current material strip, a first distance between the visual inspection system and the marking mechanism, and an operating speed of the slitting machine;

[0010] The winding mechanism is used to wind up the current material strip.

[0011] In some embodiments, the marking mechanism is further used to: mark the next material strip based on the received second marking signal when the inspection result of the next material strip indicates that the next material strip has a defect; wherein the inspection result of the next material strip is determined based on the image of the next material strip captured by the visual inspection system, the second marking signal is generated based on the defect of the next material strip, the first distance and the operating speed of the slitting machine, and the distance between the defect of the next material strip and the defect of the current material strip is greater than a preset distance threshold.

[0012] In the embodiment of the present disclosure, on the one hand, a second marking signal is generated based on the defects of the next material strip, the distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, thereby improving the accuracy and timeliness of the second marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being involved in the battery cell; on the other hand, the next marking is performed when the distance between the two defects is greater than the preset distance threshold, thereby reducing the number of marking times and reducing system consumption.

[0013] In some embodiments, the visual inspection system includes a first image acquisition device and a second image acquisition device arranged in sequence along the transmission direction of the material strip, and the inspection result of the current material strip includes a first inspection result and a second inspection result, wherein: the first image acquisition device is used to acquire a first image of the current material strip; wherein the first image is used to determine the first inspection result, and the first inspection result indicates whether the current material strip has a first defect; the second image acquisition device is used to acquire a second image of the current material strip; wherein the second image is used to determine the second inspection result, and the second inspection result indicates whether the current material strip has a second defect, the second defect is located on the second side of the current material strip and the first defect is located on the first side of the current material strip, and / or the type of the second defect is different from the type of the first defect.

[0014] In the embodiments of the present disclosure, on the one hand, multiple defect detections are performed on the same side and / or different sides of the material strip using images captured by different image acquisition devices, thereby improving the comprehensiveness and accuracy of defect detection; on the other hand, the detection results of the material strip are determined based on the images captured by each image acquisition device, thereby improving the accuracy of the detection results.

[0015] In some embodiments, the marking mechanism includes a first marking mechanism and a second marking mechanism, and the winding mechanism includes a first winding mechanism and a second winding mechanism, wherein: the first marking mechanism is used to mark the first part of the current material tape based on the received first marking signal when the defect of the current material tape is located in the first part of the current material tape; the first winding mechanism is used to wind up the first part of the current material tape; the second marking mechanism is used to mark the second part of the current material tape based on the received first marking signal when the defect of the current material tape is located in the second part of the current material tape; the second winding mechanism is used to wind up the second part of the current material tape, and the first part of the current material tape and the second part of the current material tape are formed by the slitting mechanism for slitting the current material tape.

[0016] In the embodiment disclosed herein, on the one hand, the corresponding marking mechanism is selected according to the location of the defect to mark the unqualified material strip, thereby improving the accuracy and pertinence of the marking, so as to facilitate the subsequent accurate removal of unqualified material strips; on the other hand, different parts of the material strip are wound up in time by different winding mechanisms, thereby improving the accuracy of the slitting machine operation, and being able to meet the production needs of high timeliness and high efficiency.

[0017] In some embodiments, the marking mechanism includes a conveying device, a separating device, a pressing device and a sensing device located on the pressing device, wherein: the conveying device is used to drive the conveyor belt with the defective label to move; the separating device is used to peel the defective label from the conveyor belt; the pressing device is used to press the defective label onto the current material belt to mark the current material belt; the sensing device is used to obtain information about the marking material belt in the pressing device, and the information about the marking material belt is used to determine the working status of the pressing device, and the marking material belt includes a plurality of identification segments arranged at intervals, and adjacent identification segments have different identifications.

[0018] In the disclosed embodiment, the information of the marking tape obtained by the sensor device is used to determine the working status of the pressing device, so as to promptly know whether the pressing device is abnormal, reducing the possibility of wrinkles, skewness, missing labels, etc. caused by abnormalities in the pressing device, and greatly improving the error rate of the winding process.

[0019] In some embodiments, the slitting machine further includes at least one of the following: an encoding mechanism, a deviation correction mechanism, and a tension adjustment mechanism, wherein: the encoding mechanism is located between the unwinding mechanism and the rewinding mechanism, and is used to send at least one output signal to a preset control device, so that the control device generates the first marking signal based on the at least one output signal; the deviation correction mechanism is located between the unwinding mechanism and the slitting mechanism, and is used to correct the deviation of the current material strip; the tension adjustment mechanism is located between the marking mechanism and the rewinding mechanism, and is used to adjust the rewinding tension of the rewinding mechanism.

[0020] In the embodiment of the present disclosure, on the one hand, the position of the material strip is located by the signal output by the encoding mechanism, thereby improving the accuracy of positioning, thereby improving the accuracy and timeliness of the first marking signal, reducing the possibility of material waste while also reducing production costs; on the other hand, by integrating a multi-functional mechanism into the slitting machine, the functions of the slitting machine are enriched, improving the slitting quality while also improving the slitting efficiency, thereby improving the versatility and adaptability of the slitting machine.

[0021] The present disclosure provides a method for slitting a material strip, which is applied to any of the slitting machines described above. The method comprises:

[0022] Acquiring an image of the current material strip released by the unwinding mechanism through the visual inspection system;

[0023] Cutting the current material strip along the length direction of the material strip by the cutting mechanism;

[0024] When the inspection result of the current material strip indicates that the current material strip has a defect, the current material strip is marked by the marking mechanism based on the received first marking signal; wherein the inspection result of the current material strip is determined based on the image of the current material strip, and the first marking signal is generated based on the defect of the current material strip, a first distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine.

[0025] In the embodiment disclosed herein, first, a marking mechanism is integrated in the slitting machine to automatically mark defective material strips, which reduces labor costs and improves the production efficiency and automation level of the equipment compared to manual online processing; secondly, when a defect in the material strip is detected, a first marking signal is generated based on the defect, the distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, improves the accuracy and timeliness of the first marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being rolled into the battery cell; finally, all material strips are wound up in time by the winding mechanism, which improves the accuracy of the slitting machine operation and can meet the production needs of high timeliness and high efficiency.

[0026] In some embodiments, the inspection result of the current material strip includes a first inspection result and a second inspection result; the collecting of the image of the current material strip released by the unwinding mechanism by the visual inspection system includes: collecting a first image of the current material strip by the first image acquisition device of the visual inspection system; wherein the first image is used to determine the first inspection result, and the first inspection result characterizes whether the current material strip has a first defect; collecting a second image of the current material strip by the second image acquisition device of the visual inspection system; wherein the second image is used to determine the second inspection result, and the second inspection result characterizes whether the current material strip has a second defect, the second defect is located on the second side of the current material strip and the first defect is located on the first side of the current material strip, and / or the type of the second defect is different from the type of the first defect.

[0027] In the embodiments of the present disclosure, on the one hand, multiple defect detections are performed on the same side and / or different sides of the material strip using images captured by different image acquisition devices, thereby improving the comprehensiveness and accuracy of defect detection; on the other hand, the detection results of the material strip are determined based on the images captured by each image acquisition device, thereby improving the accuracy of the detection results.

[0028] In some embodiments, the slitting method further includes at least one of the following: when the distance between the defect of the current material strip and the defect of the next material strip is not greater than a preset distance threshold, marking the current material strip based on the received first marking signal by the marking mechanism; when the distance between the defect of the current material strip and the defect of the next material strip is greater than the distance threshold, marking the current material strip based on the received first marking signal and marking the next material strip based on the received second marking signal by the marking mechanism; wherein the second marking signal is generated based on the defect of the next material strip, the first distance and the operating speed of the slitting machine.

[0029] In the embodiment of the present disclosure, on the one hand, a second marking signal is generated based on the defects of the next material strip, the distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, thereby improving the accuracy and timeliness of the second marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being involved in the battery cell; on the other hand, the next marking is performed when the distance between the two defects is greater than the preset distance threshold, thereby reducing the number of marking times and reducing system consumption.

[0030] In some embodiments, the slitting method further includes at least one of the following: when the defect of the current material tape is located in the first part of the current material tape, marking the first part of the current material tape by the first marking mechanism in the marking mechanism based on the received first marking signal; when the defect of the current material tape is located in the second part of the current material tape, marking the second part of the current material tape by the second marking mechanism in the marking mechanism based on the received first marking signal; wherein, the first part of the current material tape and the second part of the current material tape are formed by slitting the current material tape by the slitting mechanism.

[0031] In the embodiment of the present disclosure, a corresponding marking mechanism is selected according to the location of the defect to mark the unqualified material strip, thereby improving the accuracy and pertinence of the marking, so as to facilitate the subsequent accurate removal of the unqualified material strip.

[0032] In some embodiments, the slitting method further includes: obtaining information of the marking tape in the pressing device of the marking mechanism through the sensing device of the marking mechanism; wherein, the marking tape includes a plurality of marking segments arranged at intervals, and adjacent marking segments have different markings; when the working status of the pressing device indicates that there is an abnormality in the pressing device, a prompt is given through the prompt device of the slitting machine; wherein, the working status of the pressing device is determined based on the information of the marking tape.

[0033] In the embodiment disclosed herein, on the one hand, the information of the marking tape obtained by the sensor device is used to determine the working status of the pressing device, thereby improving the accuracy of the working status; on the other hand, when the working status indicates that the pressing device is abnormal, a prompt is given in time, thereby reducing the possibility of wrinkles, skewness, missing labels, etc. caused by the abnormality of the pressing device, and greatly improving the misjudgment rate of the winding process.

[0034] The present disclosure provides a method for detecting a material strip, which is applied to a control device. The method includes:

[0035] Controlling the visual inspection system of the slitting machine to collect an image of the current material strip; wherein the slitting machine includes an unwinding mechanism, the visual inspection system, a marking mechanism, and a rewinding mechanism sequentially arranged along the conveying direction of the material strip, and the slitting machine also includes a slitting mechanism located between the unwinding mechanism and the marking mechanism;

[0036] Determining a detection result of the current material strip based on the image of the current material strip;

[0037] When the inspection result of the current material strip indicates that the current material strip has defects, a first marking signal is generated based on the defects of the current material strip, a first distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, and the first marking signal is sent to the marking mechanism, so that the marking mechanism marks the current material strip based on the first marking signal.

[0038] In the disclosed embodiments, firstly, by automatically detecting defects on the material strip, the detection cost is reduced, and the detection efficiency and degree of automation are improved compared with manual detection; secondly, a marking mechanism is integrated in the slitting machine to automatically mark the defective material strip, which reduces labor costs and improves the production efficiency and degree of automation of the equipment compared with manual online processing; finally, when a defect in the material strip is detected, a first marking signal is generated based on the defect, the distance between the visual detection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, improves the accuracy and timeliness of the first marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being drawn into the battery cell.

[0039] In some embodiments, the generating of the first marking signal based on the defect of the current material strip, the first distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine includes: using a preset correspondence relationship to determine the target processing method corresponding to the defect of the current material strip; wherein the correspondence relationship characterizes the relationship between at least one defect and at least one processing method, and the at least one processing method includes at least one of the following: prompt processing, shutdown processing, and marking processing; when the target processing method includes marking processing, the generating of the first marking signal based on the defect of the current material strip, the first distance, and the operating speed of the slitting machine.

[0040] In the embodiment of the present disclosure, on the one hand, the target processing method corresponding to the defect is determined based on the corresponding relationship, thereby improving the accuracy and flexibility of the target processing method; on the other hand, the first marking signal is generated only when the material strip needs marking processing, thereby improving the targetedness of the material strip marking processing.

[0041] In some embodiments, the detection method further includes: displaying a configuration interface, the configuration interface including a configuration area, the configuration area being used to configure the relationship between at least one defect and at least one processing method; and determining the corresponding relationship in response to a configuration operation performed in the configuration area.

[0042] In the embodiment of the present disclosure, the corresponding relationship is configured through a visual interface, which simplifies the operation steps and improves the accuracy of the corresponding relationship.

[0043] In some embodiments, the first marking signal is generated based on the defect of the current material strip, the first distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, including: determining a first coding value based on the position of the defect of the current material strip in the image; determining a second coding value based on the first distance and the operating speed of the slitting machine; determining a target coding value based on the sum of the first coding value and the second coding value; and generating the first marking signal when the coding value corresponding to the output signal of the coding mechanism of the slitting machine is the target coding value.

[0044] In the embodiment of the present disclosure, on the one hand, the target coding value is determined based on the position of the defect of the current material strip in the image, the first distance and the operating speed of the slitting machine, thereby improving the accuracy of the target coding value; on the other hand, the coding value corresponding to the output signal of the encoding mechanism of the slitting machine is the target coding value, that is: when the current material strip is about to run into the marking range of the marking mechanism, the first marking signal is regenerated, thereby improving the accuracy and timeliness of the first marking signal, thereby reducing the possibility of marking delay.

[0045] In some embodiments, the image includes multiple rows and columns, and each row corresponds to a coding value; determining the first coding value based on the position of the defect of the current material strip in the image includes: based on the contour information of the defect of the current material strip, determining the target row corresponding to the defect of the current material strip from multiple rows in the image; and using the coding value corresponding to the target row as the first coding value.

[0046] In the embodiment of the present disclosure, the target row of the defect in the image is determined based on the contour information of the defect, which improves the accuracy of the defect position and thus improves the accuracy of the first code value.

[0047] In some embodiments, the second coding value is determined based on the first distance and the operating speed of the slitting machine, including: determining the labeling time of the marking mechanism based on the operating speed of the slitting machine; determining the offset distance based on the operating speed of the slitting machine and the labeling time of the marking mechanism; and determining the second coding value based on the first distance, the offset distance and the pulse equivalent of the encoding mechanism.

[0048] In the embodiment of the present disclosure, first, the labeling time is determined according to the running speed of the slitting machine, fully considering the influence of the running speed on the labeling time, thereby improving the accuracy of the labeling time; secondly, the offset distance is determined in time according to the running speed and the labeling time, thereby improving the accuracy of the offset distance; finally, the second coding value is determined according to the first distance, the offset distance and the pulse equivalent, thereby fully considering the marking delay, thereby improving the accuracy of the second coding value.

[0049] In some embodiments, determining the second coding value based on the first distance, the offset distance and the pulse equivalent of the coding mechanism includes: determining the second distance based on the difference between the first distance and the offset distance; and determining the second coding value based on the ratio between the second distance and the pulse equivalent.

[0050] In the embodiment of the present disclosure, on the one hand, the second distance is determined based on the difference between the first distance and the offset distance, thereby improving the accuracy of the second distance; on the other hand, the second coding value is determined by the ratio between the second distance and the pulse equivalent, thereby improving the accuracy of the second coding value.

[0051] In some embodiments, the sending of the first marking signal to the marking mechanism so that the marking mechanism marks the current material tape based on the first marking signal includes at least one of the following: when the defect of the current material tape is located in the first part of the current material tape, the first marking signal is sent to the first marking mechanism of the marking mechanism so that the first marking mechanism marks the first part of the current material tape based on the first marking signal; when the defect of the current material tape is located in the second part of the current material tape, the first marking signal is sent to the second marking mechanism of the marking mechanism so that the second marking mechanism marks the second part of the current material tape based on the first marking signal; wherein, the first part of the current material tape and the second part of the current material tape are formed by slitting the current material tape by the slitting mechanism.

[0052] In the embodiment of the present disclosure, a corresponding marking mechanism is selected according to the location of the defect to mark the unqualified material strip, thereby improving the accuracy and pertinence of the marking, so as to facilitate the subsequent accurate removal of the unqualified material strip.

[0053] In some embodiments, the detection method further includes: when the defect of the next material strip and the defect of the current material strip are greater than a preset distance threshold, a second marking signal is generated based on the defect of the next material strip, the first distance and the operating speed of the slitting machine, and the second marking signal is sent to the marking mechanism, so that the marking mechanism marks the next material strip based on the second marking signal.

[0054] In the embodiment of the present disclosure, on the one hand, a second marking signal is generated based on the defects of the next material strip, the distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, thereby improving the accuracy and timeliness of the second marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being involved in the battery cell; on the other hand, the next marking is performed when the distance between the two defects is greater than the preset distance threshold, thereby reducing the number of marking times and reducing system consumption.

[0055] In some embodiments, the detection method further includes: determining the working state of the pressing device based on information of the marking tape in the pressing device of the marking mechanism obtained by the sensing device of the marking mechanism, the marking tape including a plurality of marking segments arranged at intervals, and adjacent marking segments having different markings; and controlling the prompt device of the slitting machine to give a prompt when the working state of the pressing device indicates that there is an abnormality in the pressing device.

[0056] In the embodiment disclosed herein, on the one hand, the information of the marking tape obtained by the sensor device is used to determine the working status of the pressing device, thereby improving the accuracy of the working status; on the other hand, when the working status indicates that the pressing device is abnormal, a prompt is given in time, thereby reducing the possibility of wrinkles, skewness, missing labels, etc. caused by the abnormality of the pressing device, and greatly improving the misjudgment rate of the winding process.

[0057] In an embodiment of the present disclosure, the slitting machine includes an unwinding mechanism, a visual inspection system, a marking mechanism and a rewinding mechanism which are sequentially arranged along the conveying direction of the material tape, and the slitting machine also includes a slitting mechanism located between the unwinding mechanism and the marking mechanism, wherein: the unwinding mechanism is used to release the material tape; the visual inspection system is used to collect an image of the current material tape released by the unwinding mechanism; the slitting mechanism is used to slit the current material tape along the length direction of the material tape; the marking mechanism is used to mark the current material tape based on a received first marking signal when a detection result of the current material tape indicates that the current material tape has a defect, the detection result of the current material tape is determined based on the image of the current material tape, the first marking signal is generated based on the defect of the current material tape, a first distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine; the rewinding mechanism is used to rewind the current material tape. In this way, firstly, a marking mechanism is integrated in the slitting machine to automatically mark defective material strips, which reduces labor costs and improves the production efficiency and automation level of the equipment compared to manual online processing; secondly, when a defect in the material strip is detected, a first marking signal is generated based on the defect, the distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, improves the accuracy and timeliness of the first marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being rolled into the battery cell; finally, all material strips are wound up in time by the winding mechanism, which improves the accuracy of the slitting machine operation and can meet the production needs of high timeliness and high efficiency.

[0058] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The accompanying drawings herein are incorporated into and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and, together with the specification, are used to explain the technical solutions of the present disclosure.

[0060] Figure 1 A schematic diagram of the implementation process of a material strip detection method provided in an embodiment of the present disclosure Figure 1 ;

[0061] Figure 2 A schematic diagram of a first coding value provided in an embodiment of the present disclosure;

[0062] Figure 3 A schematic diagram of a second distance provided in an embodiment of the present disclosure;

[0063] Figure 4A schematic diagram of the implementation process of a material strip detection method provided in an embodiment of the present disclosure Figure 2 ;

[0064] Figure 5 A schematic diagram of a configuration interface provided in an embodiment of the present disclosure Figure 1 ;

[0065] Figure 6 A schematic diagram of a configuration interface provided in an embodiment of the present disclosure Figure 2 ;

[0066] Figure 7 A schematic diagram of the structure of a slitting machine provided in an embodiment of the present disclosure Figure 1 ;

[0067] Figure 8 A schematic diagram of the structure of a visual inspection system provided in an embodiment of the present disclosure;

[0068] Figure 9 A schematic diagram of the structure of a slitting machine provided in an embodiment of the present disclosure Figure 2 ;

[0069] Figure 10 A schematic diagram of the structure of a marking mechanism provided in an embodiment of the present disclosure;

[0070] Figure 11 A schematic diagram of the structure of a slitting machine provided in an embodiment of the present disclosure Figure 3 ;

[0071] Figure 12 A schematic diagram of the implementation flow of a material strip slitting method provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0072] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limiting the present disclosure. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0073] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0074] In the following description, the terms "first\second\third" are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0075] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the art of the present disclosure. The terms used herein are only for the purpose of describing the embodiments of the present disclosure and are not intended to limit the present disclosure.

[0076] In related technologies, new energy batteries are increasingly being used in daily life and industry. New energy batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields. As the application areas of power batteries continue to expand, their market demand is also growing. Batteries can be single cells. A single cell is a basic unit that can convert chemical energy into electrical energy and can be used to make battery modules or battery packs to power electrical devices. A single cell can be a secondary battery, which refers to a cell that can be recharged to activate the active material after discharge and continue to be used. Cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, and others. A battery can also be a single physical module comprising one or more cells to provide higher voltage and capacity. When there are multiple cells, they are connected in series, parallel, or in parallel via a busbar.

[0077] Electrode sheets are a key component of battery cells and directly determine the battery's electrochemical performance and safety. They consist of a metal current collector and a coating uniformly applied to the metal current collector. During the manufacturing process, electrode sheets are delivered in rolls for coating, rolling, slitting, and other processes. In this disclosure, electrode sheet rolls are also referred to as strips.

[0078] The production equipment for the pre-process of battery cells (for example, slitting machines, die-cutting machines, etc.) usually uses a visual acquisition system to detect defects in the material strips (for example, metal leakage, cracking, etc.). Once a defect in the material strip is detected, the existing slitting machine only issues an alarm and requires manual online processing, which has problems such as high labor costs, long processing time, and low production capacity. Although the existing die-cutting machines can mark defects, the cutting mechanism cannot send the marking signal to the control device in time due to signal blocking, network problems, etc., so when the control device controls the marking mechanism for marking, there are problems such as inaccurate marking position and material waste. When the marking position exceeds the error range, the sensor of the winding mechanism cannot correctly identify the marking, causing the marking to be rolled into the battery cell, which will seriously affect the performance of the battery.

[0079] The disclosed embodiment provides a slitting machine. First, a marking mechanism is integrated in the slitting machine to automatically mark defective material strips. Compared with manual online processing, this reduces labor costs and improves the production efficiency and automation level of the equipment. Second, when a defect in the material strip is detected, a first marking signal is generated based on the defect, the distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine. This fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, improves the accuracy and timeliness of the first marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being rolled into the battery cell. Finally, all material strips are wound up in time by the winding mechanism, which improves the accuracy of the slitting machine operation and can meet the production requirements of high timeliness and high efficiency.

[0080] The method provided in the embodiments of the present disclosure can be performed by a slitting machine, a control device, and the like. The slitting machine can be a slitting device of any suitable type and in any suitable scenario. In some embodiments, the slitting machine may include the control device. The control device may include a processor and a memory storing processor-executable instructions, and when the instructions are executed by the processor, the method provided in the embodiments of the present disclosure is implemented. The processor may include, but is not limited to, a programmable logic controller (PLC), a host computer, a mid-level computer, a single-chip microcomputer, and the like.

[0081] Below, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the drawings in the embodiments of the present disclosure.

[0082] Figure 1 A schematic diagram of the implementation process of a strip detection method is provided for the embodiment of the present disclosure Figure 1 , the detection method is applied to control devices, such as Figure 1 As shown, the detection method includes steps S11 to S13, wherein:

[0083] Step S11: Control the visual inspection system of the slitting machine to collect an image of the current material strip.

[0084] Here, the slitting machine includes an unwinding mechanism, a visual inspection system, a marking mechanism and a rewinding mechanism which are sequentially arranged along the conveying direction of the material strip. The slitting machine also includes a slitting mechanism located between the unwinding mechanism and the marking mechanism.

[0085] The control device can be any suitable device, such as a host computer, a PLC, etc. In practice, the control device can be located in the slitting machine or can be independent of the slitting machine. The control device is in communication with the slitting machine. In some embodiments, the slitting machine can be part of a die-cutting machine.

[0086] The visual inspection system can be any suitable system capable of performing image acquisition. In some embodiments, the visual inspection system may include at least one image acquisition device, which may include but is not limited to a camera, a camera, etc. For example, the visual inspection system includes four cameras arranged in sequence along the conveying direction of the material strip. The images acquired by the first camera and the second camera are used to perform defect detection on the same side or different sides (i.e., the first side or side A, the second side or side B, or referred to as the front side and the back side) of the material strip before slitting, such as metal leakage in the film area, dark spots, dark marks, cracks, etc. The images acquired by the third camera and the fourth camera are respectively used to perform defect detection and size detection on different parts of the material strip after slitting, such as straight edge excess, breakage, cracks, metal leakage, etc.

[0087] The unwinding mechanism can be any suitable mechanism capable of performing an unwinding function. In some embodiments, the unwinding mechanism can include an unwinding shaft on which the material strip is wound. During operation, the unwinding shaft releases the material strip when rotating about its central axis. In some embodiments, the unwinding mechanism can also include a spare unwinding shaft, a roll-changing device, etc. The spare unwinding shaft is used to release the spare material strip, and the roll-changing device is used to automatically switch the unwinding shaft to the spare unwinding shaft, that is, to pull the tail of the material strip on the unwinding shaft to the head of the spare unwinding shaft for engagement. In this way, automatic roll changing is achieved through the roll-changing device, which improves roll changing efficiency and thereby enhances the operating efficiency of the die-cutting machine.

[0088] The slitting mechanism can be any suitable mechanism capable of performing a slitting function. There can be at least one slitting mechanism. In some embodiments, the number of slitting mechanisms matches the number of material conveyor lines, with each slitting mechanism being configured to slit the material on a corresponding material conveyor line. In some embodiments, the slitting mechanism can include, but is not limited to, a slitting frame and at least one cutter located on the slitting frame, the cutters being spaced apart along the length of the material, and capable of slitting the material into at least two portions.

[0089] The marking mechanism can be any suitable mechanism capable of marking the material strip, such as a laser marker, a color marker, a pattern marker, etc. The marking mechanism is used to mark the material strip as unqualified when the inspection results of the current material strip indicate that the material strip is defective. The number of such marking mechanisms can be at least one. In some embodiments, the number of such marking mechanisms matches the number of times the material strip is cut. For example, if the current material strip is cut into two parts, then the number of such marking mechanisms can also be two, each used to mark a different part of the material strip. During implementation, when the current material strip is transferred to the marking range of the marking mechanism, the current material strip is marked by the marking mechanism.

[0090] The winding mechanism can be any suitable mechanism capable of achieving a winding function. The number of such winding mechanisms can be at least one. In some embodiments, the number of winding mechanisms matches the number of strips to be cut, and each winding mechanism is used to wind up a corresponding strip. In some embodiments, the winding mechanism may include a winding shaft that winds up the strip when rotating around its central axis. In some embodiments, the winding mechanism also includes a spare winding roller and a splicing device. The splicing device is used to cut off the unwound strip after the winding roller has finished winding and wind it onto the spare winding roller. In this way, automatic winding and splicing is achieved through the splicing device, which improves the winding efficiency and thus improves the working efficiency of the die-cutting machine.

[0091] In some embodiments, the control device sends a capture instruction to the visual inspection system, causing the visual inspection system to capture an image of the current strip based on the capture instruction. This reduces the number of captures and hardware consumption compared to real-time capture. The current strip refers to the strip on the unwinding reel that is conveyed to the capture position of the visual inspection system in the direction of conveyance.

[0092] Step S12: Determine the detection result of the current material strip based on the image of the current material strip.

[0093] Here, the inspection results of the current strip may include, but are not limited to, a first target inspection result and a second target inspection result. The first target inspection result indicates that the current strip has defects, while the second target inspection result indicates that the current strip does not have defects. The defects of the strip may be inherent to the strip, such as metal leakage in the film area, dark spots, dark marks, cracks, etc., or they may be defects not inherent to the strip, such as excess straight edge material, breakage, or splicing.

[0094] In some embodiments, the captured image is compared with a corresponding standard image to obtain a detection result for the current strip. In some embodiments, the image of the current strip can be recognized using any suitable neural network or model to obtain the detection result for the current strip. The neural network / model can be trained using a training sample set. The training sample set can include sample images with different defects and sample images without defects.

[0095] In some embodiments, the visual inspection system includes a first image acquisition device and a second image acquisition device arranged in sequence along the transmission direction of the material strip. Then, the image of the current material strip includes a first image acquired by the first image acquisition device and a second image acquired by the second image acquisition device, and the inspection result of the current material strip includes a first inspection result and a second inspection result.

[0096] Here, the first detection result is determined by the control device based on the first image, and the second detection result is determined by the control device based on the second image. The first detection result indicates whether the current strip has a first defect, and the second detection result indicates whether the current strip has a second defect. The first defect and the second defect can be different types of defects, or they can be defects of the same type or different types on different surfaces.

[0097] In some embodiments, if the first detection result indicates that the current material strip has a first defect, or the second detection result indicates that the current material strip has a second defect, the first target detection result is used as the detection result of the current material strip; if the first detection result indicates that the current material strip does not have the first defect, and the second detection result indicates that the current material strip does not have the second defect, the second target detection result is used as the detection result of the current material strip.

[0098] In some embodiments, the number of the first image acquisition devices may be at least one, and the number of the second image acquisition devices may also be at least one. During implementation, the images acquired by different first image acquisition devices may be used for different types of defect detection, and / or for detecting defects on different sides of the material strip. The images acquired by different second image acquisition devices may be used for different types of defect detection, and / or for detecting defects on different sides of the material strip. For example, the number of the first image acquisition devices and the number of the second image acquisition devices are both two, wherein the images acquired by the two first image acquisition devices are used to detect different types of defects on the material strip before slitting, and the images acquired by the two second image acquisition devices are used to detect defects on different parts of the same side (e.g., side A, side B, etc.) of the material strip after slitting.

[0099] Step S13: When the inspection result of the current material strip indicates that the current material strip has defects, a first marking signal is generated based on the defects of the current material strip, the first distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, and the first marking signal is sent to the marking mechanism so that the marking mechanism marks the current material strip based on the first marking signal.

[0100] Here, the first marking signal may be any appropriate signal, and the first marking signal is used to promptly mark the current material strip as a non-conforming material strip.

[0101] The first distance may refer to the distance between any image acquisition device and the marking mechanism in the visual inspection system. For example, the distance between the last image acquisition device and the marking mechanism in the visual inspection system may be used as the first distance. In implementation, the first distance may be obtained through measurement, calibration, or other methods.

[0102] In some embodiments, different defects correspond to the same or different handling methods. Handling methods may include, but are not limited to, prompting, shutting down, and marking. During implementation, when the handling method corresponding to a defect is marking, the control device generates the first marking signal. In some embodiments, a correspondence between defects and handling methods can be pre-established. Based on this correspondence, the target handling method corresponding to the defect of the current strip can be determined. In some embodiments, this correspondence can be established through any suitable means, such as a configuration file or a configuration interface.

[0103] In some embodiments, the target coding value can be determined based on the position of the defect of the current material strip in the image, the first distance and the offset distance, and the first marking signal is generated when the coding value corresponding to the output signal of the coding mechanism of the slitting machine is the target coding value.

[0104] Here, the offset distance is determined based on the slitting machine's operating speed. In practice, since the marking mechanism experiences a relatively fixed delay from receiving the first marking signal to marking the current strip, a deviation between the actual marking position and the ideal marking position occurs, i.e., the offset distance exists. The delay time is determined based on the marking mechanism's marking speed. For example, if 20 marks are produced per second, the marking delay time is 50 (1 / 20) milliseconds.

[0105] In some embodiments, the offset distance is related to the running speed and the bid-issuing time of the bid-issuing mechanism, and the bid-issuing time is opposite to the bid-issuing speed. During implementation, if the bid-issuing time is fixed, the faster the running speed, the larger the offset distance, and conversely, the slower the running speed, the smaller the offset distance; if the running speed is fixed, the shorter the bid-issuing time, the smaller the offset distance, and conversely, the longer the bid-issuing time, the larger the offset distance. In some embodiments, the bid-issuing speed can be adapted to the running speed, that is, different running speeds are adapted to different bid-issuing speeds. During implementation, when the running speed is fixed, the bid-issuing speed is also fixed, then the bid-issuing time is also fixed, and thus the offset distance is also fixed. In some embodiments, in order to reduce the offset distance, when the bid-issuing speed is fixed, since the bid-issuing time is fixed, then the running speed can be adjusted to reduce the offset distance.

[0106] The encoding mechanism can be any suitable device that can realize this function. For example, an encoder. The encoding mechanism communicates with the control device and is used to send at least one generated output signal to the control device so that the control device can locate the position of the current material strip according to the output signal. The output signal can be a pulse signal, a square wave signal, etc. During implementation, the control device can calculate the encoding value corresponding to the output signal sent by the encoding mechanism in real time. When the encoding value corresponding to the output signal is less than the target encoding value, it indicates that the current material strip has not yet been transmitted to the marking range of the marking mechanism. At this time, there is no need to generate the first marking signal; when the encoding value corresponding to the output signal is the target encoding value, it indicates that the current material strip has been transmitted to the marking range of the marking mechanism. At this time, the first marking signal can be generated.

[0107] The number of marking mechanisms may be at least one. For example, the marking mechanism includes a first marking mechanism and a second marking mechanism. The first marking mechanism is configured to mark the first portion of the current material strip when a defect exists on the first portion. The second marking mechanism is configured to mark the second portion of the current material strip when a defect exists on the second portion. The first portion of the current material strip and the second portion of the current material strip are formed by slitting the current material strip via the slitting mechanism.

[0108] In the disclosed embodiments, firstly, by automatically detecting defects on the material strip, the detection cost is reduced, and the detection efficiency and degree of automation are improved compared with manual detection; secondly, a marking mechanism is integrated in the slitting machine to automatically mark the defective material strip, which reduces labor costs and improves the production efficiency and degree of automation of the equipment compared with manual online processing; finally, when a defect in the material strip is detected, a first marking signal is generated based on the defect, the distance between the visual detection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, improves the accuracy and timeliness of the first marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being drawn into the battery cell.

[0109] In some embodiments, the step S13 of “sending the first marking signal to the marking mechanism so that the marking mechanism marks the current material strip based on the first marking signal” includes step S131 and / or step S132, wherein:

[0110] Step S131: When the defect of the current material strip is located in the first part of the current material strip, send a first marking signal to a first marking mechanism of the marking mechanism, so that the first marking mechanism marks the first part of the current material strip based on the first marking signal.

[0111] Here, the first marking mechanism may be any suitable mechanism capable of marking the material strip, for example, a laser marking machine, a color marking machine, a pattern marking machine, and the like.

[0112] When performing defect detection on an image of the current strip, the control device can determine whether the current strip has a defect, the location of the defect, and other information. The current strip includes a first edge and a second edge along its width. The first portion of the current strip includes at least the first edge of the current strip. If a third distance between the defect and the first edge of the current strip satisfies a preset distance condition, the defect is located in the first portion. The distance condition can be any suitable condition. For example, it can be less than a distance threshold. The distance threshold can be any suitable value, such as half the width of the strip. In some embodiments, since defects may be irregular, the minimum bounding rectangle that encloses the defect can be used as the defect size. In this case, the third distance can be the distance between the first edge and a predetermined side of the minimum bounding rectangle (parallel to the first edge). The predetermined side can include, but is not limited to, the upper edge, the lower edge, or the middle edge (i.e., the midpoint between the upper and lower edges). For example, if the third distance between the first edge of the strip and the middle edge of the minimum bounding rectangle is less than the distance threshold, the defect is located in the first portion.

[0113] In some embodiments, the control device may communicate directly with the first marking mechanism, and the control device may send a first marking signal to the first marking mechanism, so that the first marking mechanism marks the first portion of the current material strip based on the first marking signal.

[0114] Step S132: When the defect of the current material tape is located in the second part of the current material tape, the first marking signal is sent to the second marking mechanism of the marking mechanism, so that the second marking mechanism marks the second part of the current material tape based on the first marking signal; wherein the first part of the current material tape and the second part of the current material tape are formed by cutting the current material tape by the slitting mechanism.

[0115] Here, the second marking mechanism may be any suitable mechanism capable of marking the material strip, for example, a laser marking machine, a color marking machine, a pattern marking machine, and the like.

[0116] The current material strip includes a first edge and a second edge along the width direction of the material strip. The second part of the current material strip includes at least the second edge of the current material strip. If the fourth distance between the defect and the second edge of the current material strip meets the preset distance condition, it indicates that the defect is located in the second part. The fourth distance may refer to the distance between the second edge and the set side of the minimum circumscribed rectangle (parallel to the second edge). The set side may include but is not limited to the upper side, the lower side, the middle side (i.e., the median of the upper side and the lower side), etc. For example, if the distance between the second edge of the material strip and the middle side of the minimum circumscribed rectangle is less than the distance threshold, it indicates that the defect is located in the second part.

[0117] In some embodiments, the control device may communicate directly with the second marking mechanism. The control device may send the first marking signal to the second marking mechanism, so that the second marking mechanism marks the second portion of the current material strip based on the first marking signal.

[0118] In the embodiment of the present disclosure, a corresponding marking mechanism is selected according to the location of the defect to mark the unqualified material strip, thereby improving the accuracy and pertinence of the marking, so as to facilitate the subsequent accurate removal of the unqualified material strip.

[0119] In some embodiments, the step S13 of “generating a first marking signal based on the defect of the current strip, the first distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine” includes steps S141 to S144, wherein:

[0120] Step S141: Determine a first coding value based on the position of the defect of the current material strip in the image.

[0121] Here, the visual acquisition system continuously captures the material strip, outputting an image frame every specified number of rows. This image can be a specific frame output by the visual acquisition system. The image includes multiple rows, for example, 5000 rows. During implementation, when the control device receives the image, it uses the code value corresponding to the output signal sent by the encoding mechanism as the code value corresponding to the first row of the image. Based on the code value corresponding to the first row, the code values ​​corresponding to the other rows can be derived. Therefore, the code value corresponding to the position of the defect in the image is used as the first code value.

[0122] In some embodiments, the image includes multiple rows and columns, each row corresponds to a code value, and step S141 includes step S1411, wherein:

[0123] Step S1411: Based on the contour information of the defect of the current material strip, determine the target row corresponding to the defect of the current material strip from multiple rows in the image, and use the coding value corresponding to the target row as the first coding value.

[0124] Here, since the defect may be irregular, the minimum circumscribed rectangle that can surround the outline of the defect can be used as the size of the defect, and the position of the defect in the image includes the position of the minimum circumscribed rectangle in the image.

[0125] The target row can be the row in the image corresponding to the set side of the minimum circumscribed rectangle, wherein the set side can include but is not limited to the upper side, the lower side, the middle side (i.e., the median of the upper side and the lower side), etc. For example, the row in the image corresponding to the upper side of the minimum circumscribed rectangle is used as the target row. During implementation, the encoding value corresponding to the target row is used as the first encoding value. In some embodiments, if the row corresponding to the set side in the image is not unique, the target row can be determined based on preset rules. The preset rules can include but are not limited to random, default, user settings, etc. For example, if the rows in the image corresponding to the upper side of the minimum circumscribed rectangle include the Nth row and the N+1th row, then the Nth row or the N+1th row can be used as the target row, wherein N is not less than 0.

[0126] Figure 2 A schematic diagram of a first coding value provided in an embodiment of the present disclosure is shown in FIG. Figure 2 As shown, where:

[0127] The control device uses the code value corresponding to the output signal sent by the coding mechanism as the code value corresponding to the first row in the image 21;

[0128] When a defect 22 exists in the image 21 , a target row in the image where the middle side 231 of the minimum circumscribed rectangle 23 surrounding the defect 22 is located is determined, and a coding value corresponding to the target row is used as the first coding value.

[0129] In this way, the target row of the defect in the image is determined based on the contour information of the defect, which improves the accuracy of the defect position and thus improves the accuracy of the first code value.

[0130] Step S142: Determine a second code value based on the first distance and the operating speed of the slitting machine.

[0131] In some embodiments, step S142 includes steps S151 to S153, wherein:

[0132] Step S151: Determine the labeling time of the marking mechanism based on the operating speed of the slitting machine.

[0133] Here, the operating speed is adapted to the marking speed of the marking mechanism. When the marking speed is determined, the marking time can be obtained based on the relationship between the marking speed and the marking time. For example, if the marking mechanism marks 40 marks per second, then the marking time is 25 (1 / 40) milliseconds. In some embodiments, a correspondence between the operating speed and the marking speed can be pre-established. Then, based on the correspondence, a target marking speed adapted to the operating speed can be obtained, and based on the target marking speed, the marking time can be obtained.

[0134] Step S152: Determine the offset distance based on the operating speed of the slitting machine and the marking time of the marking mechanism.

[0135] Here, the offset distance is proportional to the operating speed and the duration of the bid. Methods for determining the offset distance may include, but are not limited to, a first product, a weighted version of the first product, and the like. The first product is the product of the operating speed and the duration of the bid. For example, the first product is used as the offset distance.

[0136] Step S153: Determine a second encoding value based on the first distance, the offset distance, and the pulse equivalent of the encoding mechanism.

[0137] Here, pulse equivalent refers to the displacement of the positioning control movement generated when the controller outputs a positioning control pulse. For linear motion, this refers to the distance moved; for circular motion, it refers to the angle of rotation. In practice, the pulse equivalent of the encoder mechanism is determined based on the circumference of one rotation of the encoder mechanism and the total number of pulses generated during that rotation. For example, the pulse equivalent is the ratio of the circumference to the total number of pulses. For example, if the circumference is 200 mm and the total number of pulses is 8000, then the pulse equivalent is 0.025 (200 / 8000) mm / pulse.

[0138] The method for determining the second coding value may include, but is not limited to, the ratio between the second distance and the pulse equivalent, the weighting of the ratio, the rounding of the ratio (including rounding up or down), the weighted rounding of the ratio, etc. The second distance is determined based on the first distance and the offset distance. The method for determining the second distance may include, but is not limited to, the difference between the first distance and the offset distance, the weighting of the difference, etc. For example, the ratio between the second distance and the pulse equivalent is used as the second coding value. For example, if the second distance is 3000 mm and the pulse equivalent is 0.025 mm / pulse, then the second coding value is 120,000 (3000 / 0.025).

[0139] In some embodiments, step S153 includes steps S1531 to S1532, wherein:

[0140] Step S1531: Determine a second distance based on the difference between the first distance and the offset distance.

[0141] Here, the second distance may be determined by, but is not limited to, the difference, a weighted value of the difference, etc. For example, the difference is used as the second distance. For example, if the first distance is 3100 mm and the offset distance is 100 mm, then the second distance is 3000 (3100-100) mm.

[0142] Figure 3 A schematic diagram of a second distance provided in an embodiment of the present disclosure is shown in FIG. Figure 3 As shown, the first distance between the camera 31 (corresponding to the aforementioned image acquisition device) and the marking machine 32 (corresponding to the aforementioned marking mechanism) is L1. Since the marking machine 32 has a relatively fixed delay time from receiving the first marking signal to marking the current material strip, it will cause a deviation between the actual marking position P2 and the ideal marking position P1, that is, there is an offset distance L2. Therefore, in order to make the actual marking position P2 close to the ideal marking position P1, the control device needs to send the first marking signal to the marking machine 32 when the material strip runs to the second distance L3 (L1-L2).

[0143] Step S1532: Determine a second coding value based on the ratio between the second distance and the pulse equivalent.

[0144] Here, the method for determining the second code value may include, but is not limited to, the ratio, a weighted value of the ratio, rounding the ratio, and rounding the weighted value of the ratio. During implementation, those skilled in the art may independently select a method for determining the second code value based on actual needs, and the embodiments of the present disclosure are not limited thereto. For example, the rounded value of the ratio may be used as the second code value.

[0145] In this way, first, the labeling time is determined according to the running speed of the slitting machine, and the influence of the running speed on the labeling time is fully considered, thereby improving the accuracy of the labeling time; secondly, the offset distance is determined in time according to the running speed and the labeling time, thereby improving the accuracy of the offset distance; finally, the second coding value is determined according to the first distance, the offset distance and the pulse equivalent, thereby fully considering the marking delay and improving the accuracy of the second coding value.

[0146] Step S143: Determine a target code value based on the sum of the first code value and the second code value.

[0147] Here, the method for determining the target code value may include, but is not limited to, the sum value, a weighted sum value, etc. During implementation, those skilled in the art may independently select the method for determining the target code value based on actual needs, and the embodiments of this disclosure are not limited thereto. For example, the sum value may be used as the target code value.

[0148] Step S144: When the code value corresponding to the output signal of the coding mechanism of the slitting machine is the target code value, generate a first marking signal.

[0149] Here, the control device can calculate the coding value corresponding to the output signal sent by the coding mechanism in real time. When the coding value corresponding to the output signal is less than the target coding value, it indicates that the current material tape has not been transmitted to the marking range of the marking mechanism. At this time, there is no need to generate the first marking signal; when the coding value corresponding to the output signal is the target coding value, it indicates that the current material tape has been transmitted to the marking range of the marking mechanism. At this time, the first marking signal can be generated.

[0150] In the embodiment of the present disclosure, a first coding value is determined based on the position of the defect of the current material strip in the image; a second coding value is determined based on the first distance and the operating speed of the slitting machine; a target coding value is determined based on the sum of the first coding value and the second coding value; and a first marking signal is generated when the coding value corresponding to the output signal of the encoding mechanism of the slitting machine is the target coding value. In this way, on the one hand, the target coding value is determined based on the position of the defect of the current material strip in the image, the first distance and the operating speed of the slitting machine, thereby improving the accuracy of the target coding value; on the other hand, when the coding value corresponding to the output signal of the encoding mechanism of the slitting machine is the target coding value, that is, when the current material strip is about to run into the marking range of the marking mechanism, the first marking signal is generated again, thereby improving the accuracy and timeliness of the first marking signal, thereby reducing the possibility of marking delay.

[0151] In some embodiments, the detection method further comprises step S16, wherein:

[0152] Step S16: When the defect of the next material strip is greater than the preset distance threshold from the defect of the current material strip, a second marking signal is generated based on the defect of the next material strip, the first distance and the operating speed of the slitting machine, and the second marking signal is sent to the marking mechanism so that the marking mechanism marks the next material strip based on the second marking signal.

[0153] Here, the next strip refers to the strip after the current strip. The method for determining the defects of the next strip is similar to that of the current strip. When implementing, please refer to the specific implementation of the above steps S11 to S12.

[0154] The distance threshold can be any suitable value. In some embodiments, when the distance between the defect in the next strip and the defect in the current strip is relatively close, only the current strip can be marked. When the distance between the defect in side A and the defect in side B is less than the distance threshold, only the defect that occurs first can be marked. For example, if the defect in side A is a defect in the current strip and the defect in side B is a defect in the next strip, then only the defect in side A can be marked. If the defect in side A is a defect in the next strip and the defect in side B is a defect in the current strip, then only the defect in side B can be marked.

[0155] The generation and sending of the second marking signal may refer to the specific implementation of the aforementioned step S13.

[0156] In the embodiment of the present disclosure, on the one hand, a second marking signal is generated based on the defects of the next material strip, the distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, thereby improving the accuracy and timeliness of the second marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being involved in the battery cell; on the other hand, the next marking is performed when the distance between the two defects is greater than the preset distance threshold, thereby reducing the number of marking times and reducing system consumption.

[0157] In some embodiments, the detection method further includes steps S171 to S172, wherein:

[0158] Step S171: Determine the working state of the pressing device based on information of the marking tape in the pressing device of the marking device acquired by the sensing device of the marking device. The marking tape includes a plurality of marking segments arranged at intervals, and adjacent marking segments have different markings.

[0159] Here, the sensing device may be any suitable device capable of achieving this function, such as a color sensor, a pattern sensor, etc.

[0160] The pressing device may be any suitable device, and is used to press the label of the marking mechanism onto the current material strip.

[0161] The marking tape can be any suitable tape. The marking tape can have different identification information, such as patterns, colors, etc. Different identification information can refer to different colors and / or different patterns. For example, the marking tape can be a half-yellow and half-red self-adhesive sticker, which is affixed to the laminating device.

[0162] The information of the identification tape may include one identification, different identifications, etc.

[0163] The operating state of the pressing device may include, but is not limited to, normal and abnormal states. During implementation, if the marking mechanism becomes stuck or the pressure wheel is improperly adjusted, the pressing device may stop rotating, indicating that the pressing device is in an abnormal operating state. Currently, this is primarily done manually, which can lead to missed or false detections. To improve detection efficiency and accuracy, the operating state of the pressing device can be determined using the information on the marking tape. Specifically, if the pressing device is in an abnormal operating state, the marking tape will contain only one identifier; if the pressing device is in a normal operating state, the marking tape will contain different identifiers.

[0164] Step S172: When the working state of the laminating and pressing device indicates that the laminating and pressing device is abnormal, controlling the prompting device of the slitting machine to give a prompt.

[0165] Here, the prompt device can be any suitable device that can realize this function. For example, a display device, a voice device, etc. During implementation, the prompt device is connected to the control device in communication, and the control device can send a prompt message to the prompt device, and the prompt device performs a prompt. Among them, the prompt message can be any suitable prompt message. During implementation, the prompt message can be a pre-set prompt message, or it can be a prompt message generated based on the working state. For example, the prompt message can be "abnormal pressing", or the prompt message can be "the working state of the current pressing device is abnormal, please deal with it in time".

[0166] In the embodiment disclosed herein, on the one hand, the information of the marking tape obtained by the sensor device is used to determine the working status of the pressing device, thereby improving the accuracy of the working status; on the other hand, when the working status indicates that the pressing device is abnormal, a prompt is given in time, thereby reducing the possibility of wrinkles, skewness, missing labels, etc. caused by the abnormality of the pressing device, and greatly improving the misjudgment rate of the winding process.

[0167] Figure 4 A schematic diagram of the implementation process of a strip detection method is provided for the embodiment of the present disclosure Figure 2 , the detection method is applied to control devices, such as Figure 4 As shown, the detection method includes steps S41 to S45, wherein:

[0168] Step S41: Control the visual inspection system of the slitting machine to collect an image of the current material strip.

[0169] Step S42: Determine the detection result of the current material strip based on the image of the current material strip.

[0170] Here, the above steps S41 to S42 correspond to the above steps S11 to S12 respectively. When implementing, please refer to the specific implementation of the above steps S11 to S12.

[0171] Step S43: When the inspection result of the current material strip indicates that the current material strip has a defect, a target processing method corresponding to the defect of the current material strip is determined using a preset corresponding relationship.

[0172] Here, the corresponding relationship represents the relationship between at least one defect and at least one processing method, and the at least one processing method includes at least one of the following: prompt processing, shutdown processing, and marking processing.

[0173] Different defects correspond to the same or different processing methods. The target processing method may include at least one processing method, for example, a marking process and a prompt process. In some embodiments, a correspondence between defects and processing methods can be pre-established. Then, based on this correspondence, the target processing method corresponding to the defect of the current strip can be obtained. In some embodiments, this correspondence can be established through any suitable means, such as a configuration file or a configuration interface.

[0174] Step S44: When the target processing method includes marking processing, a first marking signal is generated based on the defects of the current material strip, the first distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine.

[0175] Here, the method for generating the first marking signal may refer to the specific implementation of the aforementioned step S13.

[0176] Step S45: Send the first marking signal to the marking mechanism, so that the marking mechanism marks the current material strip based on the first marking signal.

[0177] Here, the sending of the first marking signal may refer to the specific implementation of the aforementioned step S13.

[0178] In the embodiment of the present disclosure, on the one hand, the target processing method corresponding to the defect is determined based on the corresponding relationship, thereby improving the accuracy and flexibility of the target processing method; on the other hand, the first marking signal is generated only when the material strip needs marking processing, thereby improving the targetedness of the material strip marking processing.

[0179] In some embodiments, the detection method further includes steps S461 to S462, wherein:

[0180] Step S461: Display a configuration interface, where the configuration interface includes a configuration area for configuring a relationship between at least one defect and at least one processing method.

[0181] Here, the configuration interface is an interactive interface for performing configuration operations and displaying information. The configuration interface may include, but is not limited to, areas where configuration operations can be performed, operation controls, and the like. The areas where configuration operations can be performed may include, but are not limited to, at least one of an area for configuring defects and treatment methods, an area for configuring dimensions, and an area for configuring other information. During implementation, those skilled in the art may determine the number of areas within the configuration interface where configuration operations can be performed, as well as the specific layout of each area within the configuration interface where configuration operations can be performed, based on actual circumstances, and this disclosure does not limit this.

[0182] The operation control can be any suitable control that can be operated. For example, an edit control, a new control, a save control, etc. During implementation, those skilled in the art can determine the number of operation controls and the location of each operation control in the configuration interface based on actual circumstances, and the embodiments of this disclosure are not limited thereto.

[0183] The configuration area is at least used to configure defects and treatment methods. In some embodiments, the configuration area can also configure size and treatment methods, configure other information, etc.

[0184] The configuration interface can be displayed on any suitable electronic device with an interface interaction function, for example, a laptop computer, a mobile phone, a tablet computer, a PDA, a personal digital assistant, a digital television, or a desktop computer. In practice, the electronic device displaying the configuration interface and the electronic device executing the detection method can be the same or different, and this is not limited here.

[0185] Figure 5 A schematic diagram of a configuration interface provided in an embodiment of the present disclosure Figure 1 ,like Figure 5 As shown, the configuration interface 500 includes a configuration area 501 , which is used to configure different defects and corresponding processing methods.

[0186] Step S462: Determine a corresponding relationship in response to the configuration operation performed in the configuration area.

[0187] Here, based on the configuration operation, a correspondence between each defect and the corresponding processing method is generated. The processing method corresponding to each defect may include at least one processing method. During implementation, different defects may correspond to the same or different processing methods.

[0188] Figure 6 A schematic diagram of a configuration interface provided in an embodiment of the present disclosure Figure 2 ,like Figure 6 As shown, the configuration interface 500 includes a configuration area 501 and a save control 502. The configuration area 501 includes a list 503, which displays at least one defect and at least one treatment method. The configuration area 501 can also configure the relationship between size and treatment method, and configure other information. The save control 502 is used to save each defect and corresponding treatment method in the list 503.

[0189] In the embodiment of the present disclosure, the corresponding relationship is configured through a visual interface, which simplifies the operation steps and improves the accuracy of the corresponding relationship.

[0190] Based on the above embodiment, the present disclosure further provides a slitting machine. Figure 7 A schematic diagram of the structure of a slitting machine provided in an embodiment of the present disclosure Figure 1 ,like Figure 7 As shown, the slitting machine 70 includes an unwinding mechanism 71, a visual inspection system 72, a marking mechanism 73, and a rewinding mechanism 74, which are sequentially arranged along the conveying direction of the material strip. The slitting machine also includes a slitting mechanism 75 located between the unwinding mechanism 71 and the marking mechanism 73, wherein:

[0191] Unwinding mechanism 71, for releasing the material strip;

[0192] A visual inspection system 72 is used to capture an image of the current material strip released by the unwinding mechanism;

[0193] The slitting mechanism 75 is used to slit the current material strip along the length direction of the material strip;

[0194] a marking mechanism 73 for marking the current strip based on a received first marking signal when an inspection result of the current strip indicates that the current strip has a defect, wherein the inspection result of the current strip is determined based on an image of the current strip, and the first marking signal is generated based on the defect of the current strip, a first distance between the visual inspection system and the marking mechanism, and an operating speed of the slitting machine;

[0195] The reeling mechanism 74 is used to reel in the current material strip.

[0196] Here, the unwinding mechanism 71 can be any suitable mechanism that can realize the unwinding function. In some embodiments, the unwinding mechanism can include an unwinding shaft, on which the material tape is wound. During implementation, the unwinding shaft releases the material tape when it rotates around its central axis. In some embodiments, the unwinding mechanism can also include a spare unwinding shaft, a roll-changing device, etc. Among them, the spare unwinding shaft is used to release the spare material tape, and the roll-changing device is used to automatically switch the unwinding shaft to the spare unwinding shaft, that is, to pull the tail of the material tape on the unwinding shaft to move to the head of the spare unwinding shaft for engagement. In this way, automatic roll changing is achieved through the roll-changing device, which improves the roll changing efficiency and thus improves the working efficiency of the die-cutting machine.

[0197] The visual inspection system 72 can be any suitable system capable of image capture. In some embodiments, the visual inspection system 72 can include at least one image capture device, which may include, but is not limited to, a camera. Images captured by different image capture devices can be used to detect different types of defects and / or to detect defects on different surfaces of the material strip. Defects detected in the material strip can be inherent to the material strip, such as metal leakage in the film area, dark spots, dark marks, cracks, etc., or defects not inherent to the material strip, such as excess material on straight edges, damage, and cracks.

[0198] The acquisition of the image of the current material strip can refer to the specific implementation of the aforementioned step S11, and the method for determining the defects of the current material strip can refer to the specific implementation of the aforementioned step S12.

[0199] In some embodiments, the visual inspection system 72 includes a first image acquisition device and a second image acquisition device arranged in sequence along the transmission direction of the material strip, and the inspection result of the current material strip includes a first inspection result and a second inspection result, wherein: the first image acquisition device is used to acquire a first image of the current material strip; wherein the first image is used to determine the first inspection result, and the first inspection result indicates whether the current material strip has a first defect; the second image acquisition device is used to acquire a second image of the current material strip; wherein the second image is used to determine the second inspection result, and the second inspection result indicates whether the current material strip has a second defect, the second defect is located on the second side of the current material strip and the first defect is located on the first side of the current material strip, and / or the type of the second defect is different from the type of the first defect.

[0200] Here, the number of the first image acquisition devices may be at least one, and the number of the second image acquisition devices may also be at least one. During implementation, the images acquired by different first image acquisition devices may be used for different types of defect detection, and / or for detecting defects on different sides of the material strip. The images acquired by different second image acquisition devices may be used for different types of defect detection, and / or for detecting defects on different sides of the material strip. For example, the number of the first image acquisition devices and the number of the second image acquisition devices are both two, wherein the images acquired by the two first image acquisition devices are used to detect different types of defects on the material strip before slitting, and the images acquired by the two second image acquisition devices are used to detect defects on different parts of the same side (e.g., side A, side B, etc.) of the material strip after slitting.

[0201] Figure 8 A schematic diagram of the structure of a visual inspection system provided in an embodiment of the present disclosure is shown in FIG. Figure 8 As shown, the visual inspection system includes a first image acquisition device and a second image acquisition device sequentially deployed along the transmission direction of the material belt, wherein the first image acquisition device includes a first camera 7211 and a second camera 7212, and the second image acquisition device includes a third camera 7221 and a fourth camera 7222, wherein:

[0202] The first camera 7211 is used to capture an image of the front side of the material strip before slitting, and the image is used to perform metal leakage detection on the front side of the material strip;

[0203] The second camera 7212 is used to capture the front image of the material strip before slitting. The front and back images are used to detect defects in the front film area of ​​the material strip;

[0204] The third camera 7221 and the fourth camera 7222 are used to capture the front image of the upper material strip and the front image of the lower material strip after slitting. The front image is used to perform defect detection on the front of the material strip after slitting (including the film area, non-film area, etc.).

[0205] In the embodiments of the present disclosure, on the one hand, multiple defect detections are performed on the same side and / or different sides of the material strip using images captured by different image acquisition devices, thereby improving the comprehensiveness and accuracy of defect detection; on the other hand, the detection results of the material strip are determined based on the images captured by each image acquisition device, thereby improving the accuracy of the detection results.

[0206] Marking mechanism 73 can be any suitable mechanism capable of marking the strip, such as a laser marker, a color marker, or a pattern marker. There can be at least one marking mechanism. In some embodiments, the number of marking mechanisms matches the number of strips to be cut. The method for determining and sending the first marking signal can be found in the detailed embodiment of step S13 above.

[0207] In some embodiments, the marking mechanism 73 includes a first marking mechanism and a second marking mechanism, and the winding mechanism 74 includes a first winding mechanism and a second winding mechanism, wherein: the first marking mechanism is used to mark the first part of the current material tape based on the received first marking signal when the defect of the current material tape is located in the first part of the current material tape; the first winding mechanism is used to wind up the first part of the current material tape; the second marking mechanism is used to mark the second part of the current material tape based on the received first marking signal when the defect of the current material tape is located in the second part of the current material tape; the second winding mechanism is used to wind up the second part of the current material tape, and the first part of the current material tape and the second part of the current material tape are formed by cutting the current material tape by the slitting mechanism.

[0208] Here, the current strip includes a first edge and a second edge along the width of the strip. The first portion of the current strip includes at least the first edge of the current strip, and the second portion of the current strip includes at least the second edge of the current strip. Whether the defect of the current strip is located in the first portion and / or the second portion can be determined by referring to the specific implementation of steps S131 and S132 above.

[0209] Figure 9 A schematic diagram of the structure of a slitting machine provided in an embodiment of the present disclosure Figure 2 ,like Figure 9 As shown, the slitting machine 70 includes an unwinding mechanism 71, a visual inspection system 72, a marking mechanism 73 and a rewinding mechanism 74, which are sequentially arranged along the conveying direction of the material strip. The slitting machine 70 also includes a slitting mechanism 75 located between the unwinding mechanism 71 and the marking mechanism 73. The visual inspection system 72 includes a first image acquisition device 721 and a second image acquisition device 722. The first image acquisition device 721 is located between the unwinding mechanism 71 and the slitting mechanism 75. The second image acquisition device 722 includes a first camera 7221 and a second camera 7222. The first camera 7221 is located between the slitting mechanism 75 and the first marking mechanism 731. The second camera 7222 is located between the slitting mechanism 75 and the second marking mechanism 732. The marking mechanism 73 includes a first marking mechanism 731 and a second marking mechanism 732. The rewinding mechanism 74 includes a first rewinding mechanism 741 and a second rewinding mechanism 742.

[0210] When the material strip is transferred to the first image acquisition device 721 , the first image acquisition device 721 acquires a first image of the material strip;

[0211] When the material strip is transferred to the slitting mechanism 75 , the slitting mechanism 75 cuts the material strip into a first portion and a second portion;

[0212] When the first portion of the material strip is transferred to the first camera 7221 , the first camera 7221 captures a second image of the first portion of the material strip;

[0213] When the second portion of the material strip is transferred to the second camera 7222 , the second camera 7222 captures a second image of the second portion of the material strip;

[0214] When the first image indicates that the material strip has a defect and the defect is located in the first portion of the material strip, or when the first image indicates that the material strip has no defect and the second image of the first portion of the material strip indicates that the first portion of the material strip has a defect, when the first portion of the material strip is transferred to the first marking mechanism 731, the first marking mechanism 731 marks the first portion of the material strip;

[0215] When the first image indicates that the material strip has a defect and the defect is located in the second portion of the material strip, or when the first image indicates that the material strip has no defect and the second image of the second portion of the material strip indicates that the second portion of the material strip has a defect, when the second portion of the material strip is transferred to the second marking mechanism 732, the second marking mechanism 732 marks the second portion of the material strip;

[0216] When the first portion of the material tape is transferred to the first reeling mechanism 741 , the first reeling mechanism 741 reels the first portion of the material tape;

[0217] When the second portion of the material tape is transferred to the second winding mechanism 742 , the second winding mechanism 742 winds up the second portion of the material tape.

[0218] In the embodiment disclosed herein, on the one hand, the corresponding marking mechanism is selected according to the location of the defect to mark the unqualified material strip, thereby improving the accuracy and pertinence of the marking, so as to facilitate the subsequent accurate removal of unqualified material strips; on the other hand, different parts of the material strip are wound up in time by different winding mechanisms, thereby improving the accuracy of the slitting machine operation, and being able to meet the production needs of high timeliness and high efficiency.

[0219] In some embodiments, the marking mechanism 73 includes a conveying device, a separating device, a pressing device, and a sensing device located on the pressing device, wherein: the conveying device is used to drive the conveyor belt with the defective label to move; the separating device is used to peel the defective label from the conveyor belt; the pressing device is used to press the defective label onto the current material belt to mark the current material belt; the sensing device is used to obtain information about the marking material belt in the pressing device, and the information about the marking material belt is used to determine the working status of the pressing device, and the marking material belt includes a plurality of marking segments set at intervals, and adjacent marking segments have different markings.

[0220] Here, the conveying device can be any suitable device capable of achieving this function. For example, the conveying device includes an unwinding roller, at least one drive roller, and a rewinding roller. The unwinding roller unwinds the conveyor belt, the drive roller transports the conveyor belt, and the rewinding roller rewinds the conveyor belt after the defective label has been removed. The conveyor belt can be made of release paper, and the defective label can be any suitable label paper.

[0221] The separation device may be any suitable device capable of achieving this function. For example, the separation device may be a vacuum suction cup capable of absorbing the defective label so that the defective label is separated from the conveyor belt.

[0222] The pressing device can be any suitable device capable of achieving this function. For example, a pressing roller assembly is provided near the separating device. When a defective label is attached to the current material strip, the pressing roller assembly presses the defective label onto the current material strip, thereby making the connection between the defective label and the current material strip tighter and preventing it from falling off.

[0223] The sensing device can be any suitable device capable of achieving this function, such as a color sensor or pattern sensor. The operating state of the pressing device may include, but is not limited to, normal state and abnormal state. In practice, the determination of the operating state of the pressing device can refer to the specific implementation of step S171 above.

[0224] Figure 10 A schematic diagram of the structure of a marking mechanism provided in an embodiment of the present disclosure is shown in FIG. Figure 10 As shown, the marking mechanism includes a conveying device, a separating device, a pressing device, a sensor device 734 located on the pressing device, and a fixing component 735, wherein the fixing component 735 is used to fix the sensor device 734 on the pressing device, wherein:

[0225] When the marking mechanism is working, if the information of the marking tape obtained by the sensor device 734 includes only one identification, indicating that the pressing device is in a non-rotating state, then the working state of the pressing device is abnormal; if the information of the marking tape obtained by the sensor device 734 includes at least two identifications, indicating that the pressing device is in a rotating state, then the working state of the pressing device is normal.

[0226] In the disclosed embodiment, the information of the marking tape obtained by the sensor device is used to determine the working status of the pressing device, so as to promptly know whether the pressing device is abnormal, reducing the possibility of wrinkles, skewness, missing labels, etc. caused by abnormalities in the pressing device, and greatly improving the error rate of the winding process.

[0227] In some embodiments, the marking mechanism 73 is also used to: mark the next material strip based on the received second marking signal when the inspection result of the next material strip indicates that the next material strip has a defect; wherein the inspection result of the next material strip is determined based on the image of the next material strip captured by the visual inspection system, the second marking signal is generated based on the defect of the next material strip, the first distance and the operating speed of the slitting machine, and the distance between the defect of the next material strip and the defect of the current material strip is greater than a preset distance threshold.

[0228] Here, the next strip refers to the strip after the current strip. The method for determining the defects of the next strip can refer to the specific implementation of the above-mentioned step S16.

[0229] The distance threshold can be any suitable value. In some embodiments, when the distance between the defect in the next strip and the defect in the current strip is close, only the current strip can be marked; when the distance between the defects in the A and B surfaces is less than the distance threshold, only the defect that appears first can be marked.

[0230] The marking mechanism marks the next material strip in a similar manner to the current material strip. During implementation, reference may be made to the specific implementation process of marking the current material strip described above.

[0231] In the embodiment of the present disclosure, on the one hand, a second marking signal is generated based on the defects of the next material strip, the distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, thereby improving the accuracy and timeliness of the second marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being involved in the battery cell; on the other hand, the next marking is performed when the distance between the two defects is greater than the preset distance threshold, thereby reducing the number of marking times and reducing system consumption.

[0232] The slitting mechanism 74 can be any suitable mechanism capable of performing a slitting function. There can be at least one slitting mechanism. In some embodiments, the number of slitting mechanisms matches the number of material conveyor lines, with each slitting mechanism being used to slit the material on a corresponding material conveyor line. In some embodiments, the slitting mechanism can include, but is not limited to, a slitting frame and at least one cutter located on the slitting frame, the cutters being spaced apart along the length of the material, and the material can be cut into at least two portions.

[0233] The winding mechanism 75 can be any suitable mechanism that can realize the winding function. The number of the winding mechanisms can be at least one. In some embodiments, the number of winding mechanisms matches the number of material strips cut, and each winding mechanism is used to wind up the corresponding material strip. In some embodiments, the winding mechanism may include a winding shaft, which winds up the material strip when rotating around its central axis. In some embodiments, the winding mechanism also includes a spare winding roller and a splicing device, and the splicing device is used to cut off the unwound material strip and wind it onto the spare winding roller after the winding roller is wound. In this way, automatic winding and splicing of materials is achieved through the splicing device, which improves the winding efficiency and thus improves the working efficiency of the die-cutting machine.

[0234] In some embodiments, the slitting machine also includes at least one of the following: an encoding mechanism, a correction mechanism, and a tension adjustment mechanism, wherein: the encoding mechanism is located between the unwinding mechanism and the rewinding mechanism, and is used to send at least one output signal to a preset control device, so that the control device generates a first marking signal based on the at least one output signal; the correction mechanism is located between the unwinding mechanism and the slitting mechanism, and is used to correct the current material strip; the tension adjustment mechanism is located between the marking mechanism and the rewinding mechanism, and is used to adjust the rewinding tension of the rewinding mechanism.

[0235] Here, the encoding mechanism can be any suitable device capable of performing this function, such as an encoder. The encoding mechanism communicates with the control device and is configured to generate and send at least one output signal to the control device, so that the control device can locate the current position of the material strip based on the output signal. The output signal can be a pulse signal, a square wave signal, etc.

[0236] The correction mechanism can be any suitable mechanism that can realize the correction function. In some embodiments, the correction mechanism may include but is not limited to correction parts, collection components, etc. The collection components may include but are not limited to cameras, rangefinders, etc., which are used to compare the collected material strip information with the standard information to determine whether the material strip is offset. If there is an offset, the correction part is controlled to move until the material strip information is consistent with the standard information. In some embodiments, the number of the correction mechanism can be at least one. For example, the correction mechanism is located between the unwinding mechanism and the slitting mechanism, and is used to correct the unslit material strip. In this way, by correcting the unslit material strip in a timely manner, the possibility of uneven cutting and high scrap rate due to material strip offset is reduced.

[0237] The tension adjustment mechanism can be any suitable mechanism capable of adjusting tension. In some embodiments, there can be at least one tension adjustment mechanism. For example, the number of tension adjustment mechanisms can match the number of strips to be cut by the slitting mechanism. This allows the tension adjustment mechanism to timely adjust the winding tension, thereby reducing the possibility of strip wrinkling, barreling, and uneven winding.

[0238] Figure 11 A schematic diagram of the structure of a slitting machine provided in an embodiment of the present disclosure Figure 3 ,like Figure 11 As shown, the slitting machine 70 includes an unwinding mechanism 71, a visual inspection system 72, a marking mechanism 73 and a rewinding mechanism 74 arranged in sequence along the conveying direction of the material strip. The slitting machine 70 also includes a slitting mechanism 75, a deviation correction mechanism 76 and a tension adjustment mechanism 77, wherein:

[0239] Unwinding mechanism 71, for releasing the material strip;

[0240] A visual inspection system 72 for collecting images of the material strip;

[0241] The deflection correction mechanism 76 is located between the unwinding mechanism 71 and the slitting mechanism 75 and is used to correct the deflection of the unslit material strip;

[0242] A slitting mechanism 75 is located between the unwinding mechanism 71 and the marking mechanism 73 and is used to slit the material strip along its length to form a plurality of material strips (corresponding to the first and second portions of the material strip);

[0243] a marking mechanism 73 for marking the material strip based on the received first marking signal when the inspection result of the material strip indicates that the material strip has a defect;

[0244] The tension adjustment mechanism 77 is located between the marking mechanism 73 and the winding mechanism 74 and is used to adjust the winding tension of the winding mechanism 74;

[0245] The winding mechanism 74 is used for winding the material strip.

[0246] In this way, on the one hand, the position of the material strip is located by the signal output by the encoding mechanism, which improves the positioning accuracy, thereby improving the accuracy and timeliness of the first marking signal, reducing the possibility of material waste while also reducing production costs; on the other hand, by integrating a variety of functional mechanisms into the slitting machine, the functions of the slitting machine are enriched, and the slitting quality is improved while the slitting efficiency is improved, thereby improving the versatility and adaptability of the slitting machine.

[0247] In the embodiment disclosed herein, first, a marking mechanism is integrated in the slitting machine to automatically mark defective material strips, which reduces labor costs and improves the production efficiency and automation level of the equipment compared to manual online processing; secondly, when a defect in the material strip is detected, a first marking signal is generated based on the defect, the distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, improves the accuracy and timeliness of the first marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being rolled into the battery cell; finally, all material strips are wound up in time by the winding mechanism, which improves the accuracy of the slitting machine operation and can meet the production needs of high timeliness and high efficiency.

[0248] Based on the above embodiments, the present disclosure provides a method for slitting a material strip, which is applied to any of the above slitting machines. Figure 12 A schematic diagram of the implementation process of a strip slitting method provided in an embodiment of the present disclosure is shown as follows: Figure 12 As shown, the strip slitting method includes steps S81 to S83, wherein:

[0249] Step S81: Capture an image of the current material strip released by the unwinding mechanism through a visual inspection system.

[0250] Here, the image of the current material strip collected by the visual inspection system can be seen from the specific implementation of the aforementioned step S11.

[0251] Step S82: Cut the current material strip along the length direction of the material strip by using a cutting mechanism.

[0252] Here, when the current material strip is transferred to the slitting mechanism, the slitting mechanism slits the current material strip into a first portion and a second portion.

[0253] Step S83: When the inspection result of the current material strip indicates that the current material strip has defects, the current material strip is marked by a marking mechanism based on the received first marking signal.

[0254] Here, the inspection result of the current strip is determined based on the image of the current strip, and the first marking signal is generated based on the defects in the current strip, the first distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine. The first marking signal can be any suitable signal. This first marking signal is used to promptly mark the current strip as unqualified. The generation and transmission of the first marking signal can be seen in the specific implementation of step S13 described above.

[0255] The inspection results of the current strip may include, but are not limited to, a first target inspection result and a second target inspection result. The first target inspection result indicates that the current strip has a defect, while the second target inspection result indicates that the current strip does not have a defect. The defect in the strip may be a defect in the strip itself or a defect not inherent in the strip. The method for determining the inspection results can be found in the specific implementation of step S12 above.

[0256] In the embodiment disclosed herein, first, a marking mechanism is integrated in the slitting machine to automatically mark defective material strips, which reduces labor costs and improves the production efficiency and automation level of the equipment compared to manual online processing; secondly, when a defect in the material strip is detected, a first marking signal is generated based on the defect, the distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, improves the accuracy and timeliness of the first marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being rolled into the battery cell; finally, all material strips are wound up in time by the winding mechanism, which improves the accuracy of the slitting machine operation and can meet the production needs of high timeliness and high efficiency.

[0257] In some embodiments, the detection result of the current material strip includes a first detection result and a second detection result, and step S81 includes steps S811 to S812, wherein:

[0258] Step S811: Capture a first image of the current material strip through a first image acquisition device of a visual inspection system.

[0259] Here, the first image is used to determine the first detection result, which indicates whether the current material strip has the first defect. The acquisition of the first image can refer to the specific implementation of the aforementioned step S11.

[0260] Step S812: Capture a second image of the current material strip through a second image acquisition device of the visual inspection system.

[0261] Here, the second image is used to determine a second inspection result. The second inspection result indicates whether the current strip has a second defect. The second defect is located on the second side of the current strip, the first defect is located on the first side of the current strip, and / or the type of the second defect is different from the type of the first defect. The acquisition of the first image can be seen in the detailed implementation of step S11 above.

[0262] In the embodiments of the present disclosure, on the one hand, multiple defect detections are performed on the same side and / or different sides of the material strip using images captured by different image acquisition devices, thereby improving the comprehensiveness and accuracy of defect detection; on the other hand, the detection results of the material strip are determined based on the images captured by each image acquisition device, thereby improving the accuracy of the detection results.

[0263] In some embodiments, the slitting method further includes step S841 and / or step S842, wherein:

[0264] Step S841: When the distance between the defect of the current material strip and the defect of the next material strip is not greater than a preset distance threshold, the current material strip is marked by a marking mechanism based on the received first marking signal.

[0265] Here, the next strip refers to the strip following the current strip. The distance threshold can be any suitable value. In practice, if the defect in the next strip is close to the defect in the current strip, only the current strip can be marked.

[0266] Step S842: When the distance between the defect of the current material strip and the defect of the next material strip is greater than the distance threshold, the current material strip is marked based on the received first marking signal and the next material strip is marked based on the received second marking signal by the marking mechanism; wherein the second marking signal is generated based on the defect of the next material strip, the first distance and the operating speed of the slitting machine.

[0267] Here, when the defect of the next material strip is far away from the defect of the current material strip, the current material strip and the next material strip can be marked. The marking of the next material strip can refer to the specific implementation of the above-mentioned step S16.

[0268] In the embodiment of the present disclosure, on the one hand, a second marking signal is generated based on the defects of the next material strip, the distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, which fully considers the impact of the operating speed of the slitting machine on the marking of the marking mechanism, thereby improving the accuracy and timeliness of the second marking signal, thereby improving the accuracy of the marking position and reducing material waste, thereby reducing the possibility of the marking being involved in the battery cell; on the other hand, the next marking is performed when the distance between the two defects is greater than the preset distance threshold, thereby reducing the number of marking times and reducing system consumption.

[0269] In some embodiments, the slitting method further includes step S851 and / or step S852, wherein:

[0270] Step S851: When a defect of the current material strip is located in a first portion of the current material strip, a first marking mechanism in the marking mechanism marks the first portion of the current material strip based on a received first marking signal.

[0271] Here, the first portion of the current strip includes at least the first edge of the current strip. If the third distance between the defect and the first edge of the current strip satisfies a predetermined distance condition, the defect is located in the first portion. In implementation, the first marking mechanism marks the current strip, as described in the specific implementation of step S131 above.

[0272] Step S852: When the defect of the current material tape is located in the second part of the current material tape, the second part of the current material tape is marked by the second marking mechanism in the marking mechanism based on the received first marking signal; wherein, the first part of the current material tape and the second part of the current material tape are formed by cutting the current material tape by the slitting mechanism.

[0273] Here, the second portion of the current strip includes at least the second edge of the current strip. If a fourth distance between the defect and the second edge of the current strip satisfies a predetermined distance condition, the defect is located in the second portion. In implementation, the second marking mechanism marks the current strip, as described in the specific implementation of step S132 above.

[0274] In the embodiment of the present disclosure, a corresponding marking mechanism is selected according to the location of the defect to mark the unqualified material strip, thereby improving the accuracy and pertinence of the marking, so as to facilitate the subsequent accurate removal of the unqualified material strip.

[0275] In some embodiments, the slitting method further includes steps S861 to S862, wherein:

[0276] Step S861: Acquire information of the marking tape in the pressing device of the marking mechanism through the sensing device of the marking mechanism; wherein the marking tape includes a plurality of marking segments arranged at intervals, and adjacent marking segments have different markings.

[0277] Here, the sensing device may be any suitable device capable of achieving this function, such as a color sensor, a pattern sensor, etc. The pressing device is used to press the label of the marking mechanism onto the current material strip.

[0278] The information of the identification tape may include one identification, different identifications, etc.

[0279] Step S862: When the working state of the laminating device indicates that there is an abnormality in the laminating device, a prompt is given through the prompt device of the slitting machine; wherein the working state of the laminating device is determined based on the information of the marking tape.

[0280] Here, the working state of the pressing device may include but is not limited to a normal state, an abnormal state, etc. The method for determining the working state of the pressing device may refer to the specific implementation of the aforementioned step S171.

[0281] The prompting device may be any suitable device capable of implementing this function, such as a display device, a voice device, etc. The manner in which the prompting device performs the prompting may refer to the specific implementation of the aforementioned step S172.

[0282] In the embodiment disclosed herein, on the one hand, the information of the marking tape obtained by the sensor device is used to determine the working status of the pressing device, thereby improving the accuracy of the working status; on the other hand, when the working status indicates that the pressing device is abnormal, a prompt is given in time, thereby reducing the possibility of wrinkles, skewness, missing labels, etc. caused by the abnormality of the pressing device, and greatly improving the misjudgment rate of the winding process.

[0283] It should be understood that references to "one embodiment" or "an embodiment" throughout this specification mean that specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present disclosure. Therefore, the appearance of "in one embodiment" or "in an embodiment" throughout this specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of the present disclosure, the order of execution of the above-mentioned processes does not necessarily indicate a precedence in execution. The execution order of each process should be determined by its function and inherent logic and should not constitute any limitation on the implementation of the embodiments of the present disclosure. The above-mentioned numbers of the embodiments of the present disclosure are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. It should be noted that, in this document, the terms "comprise," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. Without further limitation, the phrase "comprises an..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising such elements.

[0284] In the several embodiments provided in this disclosure, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is merely a logical functional division. In actual implementation, other division methods may be used, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not implemented. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between the devices or units can be electrical, mechanical, or other forms. The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment. In addition, the functional units in the embodiments of this disclosure may be fully integrated into a single processing unit, each unit may be a separate unit, or two or more units may be integrated into a single unit; the integrated units may be implemented in the form of hardware or hardware plus software functional units.

[0285] The above is only an embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present disclosure, and they should all be covered by the protection scope of the present disclosure.

Claims

1. A slitting machine, characterized in that: The slitting machine comprises an unwinding mechanism, a visual inspection system, a marking mechanism and a rewinding mechanism which are sequentially arranged along the conveying direction of the material strip. The slitting machine also comprises a slitting mechanism located between the unwinding mechanism and the marking mechanism, wherein: The unwinding mechanism is used to release the material strip; The visual inspection system is used to collect an image of the current material strip released by the unwinding mechanism; The slitting mechanism is used to slit the current material strip along the length direction of the material strip; The marking mechanism is configured to mark the current material strip based on a received first marking signal when an inspection result of the current material strip indicates that the current material strip has a defect, wherein the inspection result of the current material strip is determined based on an image of the current material strip, and the first marking signal is generated based on a position of the defect of the current material strip in the image, a first distance between the visual inspection system and the marking mechanism, and an operating speed of the slitting machine; The rewinding mechanism is used to rewind the current material strip; wherein, the number of the rewinding mechanisms is at least two, and the number of the rewinding mechanisms is the same as the number of the marking mechanisms.

2. The slitting machine according to claim 1, characterized in that: The marking mechanism is further used for: In a case where the inspection result of the next material strip indicates that the next material strip has a defect, the next material strip is marked based on the received second marking signal; wherein the inspection result of the next material strip is determined based on the image of the next material strip captured by the visual inspection system, the second marking signal is generated based on the defect of the next material strip, the first distance and the operating speed of the slitting machine, and the distance between the defect of the next material strip and the defect of the current material strip is greater than a preset distance threshold.

3. The slitting machine according to claim 1, characterized in that: The visual inspection system includes a first image acquisition device and a second image acquisition device sequentially arranged along the transmission direction of the material strip, and the inspection result of the current material strip includes a first inspection result and a second inspection result, wherein: The first image acquisition device is used to acquire a first image of the current material strip; wherein the first image is used to determine the first detection result, and the first detection result indicates whether the current material strip has a first defect; The second image acquisition device is used to acquire a second image of the current material strip; wherein the second image is used to determine the second detection result, and the second detection result indicates whether the current material strip has a second defect, the second defect is located on the second side of the current material strip and the first defect is located on the first side of the current material strip, and / or the type of the second defect is different from the type of the first defect.

4. The slitting machine according to claim 1, characterized in that: The marking mechanism includes a first marking mechanism and a second marking mechanism, and the winding mechanism includes a first winding mechanism and a second winding mechanism, wherein: The first marking mechanism is configured to mark the first portion of the current material strip based on the received first marking signal when the defect of the current material strip is located in the first portion of the current material strip; The first winding mechanism is used to wind up the first portion of the current material strip; the second marking mechanism is configured to mark the second portion of the current material strip based on the received first marking signal when the defect of the current material strip is located in the second portion of the current material strip; The second winding mechanism is used to wind up the second part of the current material tape, and the first part and the second part of the current material tape are formed by slitting the current material tape by the slitting mechanism.

5. The slitting machine according to claim 1, characterized in that: The marking mechanism includes a conveying device, a separating device, a pressing device, and a sensing device located on the pressing device, wherein: The conveying device is used to move the conveyor belt with the defective label; The separating device is used to peel the defective label from the conveyor belt; The pressing device is used to press the defective label onto the current material strip to mark the current material strip; The sensing device is used to obtain information about the marking tape in the pressing device. The information about the marking tape is used to determine the working state of the pressing device. The marking tape includes a plurality of marking segments arranged at intervals, and adjacent marking segments have different markings.

6. The slitting machine according to any one of claims 1 to 5, characterized in that: The slitting machine further comprises at least one of the following: an encoding mechanism, a deviation correction mechanism, and a tension adjustment mechanism, wherein: The encoding mechanism is located between the unwinding mechanism and the rewinding mechanism, and is used to send at least one output signal to a preset control device, so that the control device generates the first marking signal based on the at least one output signal; The deviation correction mechanism is located between the unwinding mechanism and the slitting mechanism, and is used to correct the deviation of the current material strip; The tension adjustment mechanism is located between the marking mechanism and the winding mechanism, and is used to adjust the winding tension of the winding mechanism.

7. A method for slitting a material strip, characterized in that: Applicable to the slitting machine according to any one of claims 1 to 6, the slitting method comprises: Acquiring an image of the current material strip released by the unwinding mechanism through the visual inspection system; Cutting the current material strip along the length direction of the material strip by the cutting mechanism; In a case where the inspection result of the current material strip indicates that the current material strip has defects, the current material strip is marked by the marking mechanism based on the received first marking signal.

8. The slitting method according to claim 7, characterized in that: The detection result of the current material strip includes a first detection result and a second detection result; The collecting of the image of the current material strip released by the unwinding mechanism by the visual inspection system includes: Capturing a first image of the current material strip by a first image acquisition device of the visual inspection system; wherein the first image is used to determine a first inspection result, the first inspection result indicating whether the current material strip has a first defect; A second image of the current material strip is captured by a second image capture device of the visual inspection system; wherein the second image is used to determine the second inspection result, and the second inspection result indicates whether the current material strip has a second defect, the second defect is located on the second side of the current material strip and the first defect is located on the first side of the current material strip, and / or the type of the second defect is different from the type of the first defect.

9. The slitting method according to claim 7, characterized in that: The slitting method further comprises at least one of the following: When the distance between the defect of the current material strip and the defect of the next material strip is not greater than a preset distance threshold, marking the current material strip based on the received first marking signal by the marking mechanism; When the distance between the defect of the current material strip and the defect of the next material strip is greater than the distance threshold, the current material strip is marked based on the received first marking signal and the next material strip is marked based on the received second marking signal by the marking mechanism; wherein the second marking signal is generated based on the defect of the next material strip, the first distance and the operating speed of the slitting machine.

10. The slitting method according to claim 7, characterized in that: The slitting method further comprises at least one of the following: In a case where the defect of the current material strip is located in a first portion of the current material strip, marking the first portion of the current material strip by a first marking mechanism among the marking mechanisms based on a received first marking signal; In a case where the defect of the current material strip is located in the second portion of the current material strip, marking the second portion of the current material strip by a second marking mechanism in the marking mechanism based on the received first marking signal; The first portion of the current material strip and the second portion of the current material strip are formed by the slitting mechanism slitting the current material strip.

11. The slitting method according to any one of claims 7 to 10, characterized in that: The slitting method further comprises: The sensor device of the marking mechanism obtains information of the marking tape in the pressing device of the marking mechanism; wherein the marking tape includes a plurality of marking segments arranged at intervals, and adjacent marking segments have different markings; When the working state of the pressing device indicates that there is an abnormality in the pressing device, a prompt is given through the prompt device of the slitting machine; wherein the working state of the pressing device is determined based on the information of the marking tape.

12. A method for detecting a material strip, characterized in that: Applied to a control device, the detection method includes: Controlling the visual inspection system of the slitting machine to capture an image of the current material strip; wherein the slitting machine includes an unwinding mechanism, the visual inspection system, a marking mechanism, and a rewinding mechanism sequentially arranged along the conveying direction of the material strip, the slitting machine also includes a slitting mechanism located between the unwinding mechanism and the marking mechanism, and the number of the rewinding mechanisms is at least two, and the number of the rewinding mechanisms is the same as the number of the marking mechanisms; Determining a detection result of the current material strip based on the image of the current material strip; When the inspection result of the current material strip indicates that the current material strip has a defect, a first marking signal is generated based on the position of the defect of the current material strip in the image, the first distance between the visual inspection system and the marking mechanism, and the operating speed of the slitting machine, and the first marking signal is sent to the marking mechanism, so that the marking mechanism marks the current material strip based on the first marking signal.

13. The detection method according to claim 12, characterized in that: The generating a first marking signal based on a position of the defect of the current material strip in the image, a first distance between the visual inspection system and the marking mechanism, and an operating speed of the slitting machine includes: Determining a target processing method corresponding to the defect of the current strip using a preset correspondence relationship; wherein the correspondence relationship represents a relationship between at least one defect and at least one processing method, the at least one processing method including at least one of the following: prompt processing, shutdown processing, and marking processing; In a case where the target processing method includes marking processing, the first marking signal is generated based on the position of the defect of the current material strip in the image, the first distance, and the operating speed of the slitting machine.

14. The detection method according to claim 13, characterized in that The detection method further comprises: Displaying a configuration interface, the configuration interface including a configuration area, the configuration area being used to configure a relationship between at least one defect and at least one processing method; The corresponding relationship is determined in response to a configuration operation performed in the configuration area.

15. The detection method according to claim 12, characterized in that: The generating a first marking signal based on a position of the defect of the current material strip in the image, a first distance between the visual inspection system and the marking mechanism, and an operating speed of the slitting machine includes: determining a first code value based on a position of the defect of the current strip in the image; Determining a second code value based on the first distance and the operating speed of the slitting machine; determining a target code value based on a sum of the first code value and the second code value; When the code value corresponding to the output signal of the encoding mechanism of the slitting machine is the target code value, the first marking signal is generated.

16. The detection method according to claim 15, characterized in that: The image includes multiple rows and columns, each row corresponding to a coding value; and determining the first coding value based on the position of the defect of the current material strip in the image includes: Based on the contour information of the defect of the current material strip, a target row corresponding to the defect of the current material strip is determined from multiple rows in the image, and a coding value corresponding to the target row is used as the first coding value.

17. The detection method according to claim 15, characterized in that The determining of the second code value based on the first distance and the operating speed of the slitting machine includes: Determining the labeling time of the marking mechanism based on the operating speed of the slitting machine; Determining an offset distance based on the operating speed of the slitting machine and the marking time of the marking mechanism; The second encoding value is determined based on the first distance, the offset distance, and a pulse equivalent of the encoding mechanism.

18. The detection method according to claim 17, characterized in that: The determining the second encoding value based on the first distance, the offset distance, and the pulse equivalent of the encoding mechanism includes: determining a second distance based on a difference between the first distance and the offset distance; The second encoding value is determined based on a ratio between the second distance and the pulse equivalent.

19. The detection method according to claim 12, characterized in that: The step of sending the first marking signal to the marking mechanism so that the marking mechanism marks the current material strip based on the first marking signal includes at least one of the following: When the defect of the current material strip is located in a first portion of the current material strip, sending the first marking signal to a first marking mechanism of the marking mechanism, so that the first marking mechanism marks the first portion of the current material strip based on the first marking signal; When the defect of the current material tape is located in the second part of the current material tape, the first marking signal is sent to the second marking mechanism of the marking mechanism, so that the second marking mechanism marks the second part of the current material tape based on the first marking signal; wherein the first part of the current material tape and the second part of the current material tape are formed by the slitting mechanism cutting the current material tape.

20. The detection method according to any one of claims 12 to 19, characterized in that The detection method further comprises at least one of the following: When the distance between the defect of the next material strip and the defect of the current material strip is greater than a preset distance threshold, generating a second marking signal based on the defect of the next material strip, the first distance, and the operating speed of the slitting machine, and sending the second marking signal to the marking mechanism, so that the marking mechanism marks the next material strip based on the second marking signal; Based on the information of the marking material tape in the pressing device of the marking mechanism obtained by the sensing device of the marking mechanism, the working status of the pressing device is determined, the marking material tape includes a plurality of marking segments arranged at intervals, and adjacent marking segments have different markings; when the working status of the pressing device indicates that there is an abnormality in the pressing device, the prompt device of the slitting machine is controlled to give a prompt.

Images