Method and apparatus for controlling strip welding machine

Abstract

The application provides a strip steel welding machine control method and device. When the strip steel welding machine control device is in a first working mode, a touch screen receives a first target working current input by a user. The touch screen sends the first target working current to a controller in response to a confirmation operation of the user on the first target working current. The controller sends the first target working current to corresponding welding machines through each welding machine interface, so that the corresponding welding machines weld the tail of a previous coil of strip steel and the head of a next coil of strip steel located on a welding area of a continuous strip steel production line based on the first target working current. The current of multiple welding machines is uniformly adjusted by one key, the time consumption is short, the efficiency is high, and the normal welding demand can be met.

Description

Technical Field

[0001] This application relates to the field of strip welding technology, and in particular to a strip welding machine control method and equipment. Background Technology

[0002] Steel strip (such as silicon steel and electrical steel) is a core soft magnetic material in the power, motor, and transformer manufacturing industries, and its performance directly determines the hysteresis loss and permeability of the iron core. With the rapid development of new energy power generation, high-efficiency motors, and smart grids, the market demand for high-grade non-oriented and oriented steel strips continues to grow, while higher requirements are being placed on the dimensional accuracy, surface quality, and electromagnetic performance consistency of the strip. In continuous treatment (CT) units for steel strip, common processes include continuous annealing, continuous pickling, insulating coating application, and stretching and leveling. To improve production efficiency and reduce the number of threading operations, CT units typically adopt a continuous operation mode: the tail of the previous roll of steel strip needs to be welded online quickly and reliably (e.g., using an argon arc welding machine) to achieve continuous and stable operation of the process section.

[0003] Currently, due to the diverse thicknesses of silicon steel products, operators need to manually adjust the operating current of multiple welding machines repeatedly and frequently according to different thicknesses. However, manually adjusting the operating current of multiple welding machines is time-consuming, inefficient, and cannot meet normal welding requirements. Summary of the Invention

[0004] This application provides a strip welding machine control method and equipment to solve the problem that in the prior art, manually adjusting the working current of multiple welding machines one by one is time-consuming, inefficient, and cannot meet normal welding requirements.

[0005] In a first aspect, this application provides a strip steel welding machine control method, applied to a strip steel welding machine control device. The strip steel welding machine control device includes a controller, a touch screen, and multiple welding machine interfaces. The controller is communicatively connected to the touch screen and the multiple welding machine interfaces, and each welding machine interface is used to connect to a welding machine. The method provided in this application includes: When the strip welding machine control equipment is in the first working mode, the touch screen receives the first target working current input by the user. The touchscreen responds to the user's confirmation of the first target operating current by sending the first target operating current to the controller; The controller sends a first target operating current to the corresponding welding machine through each welding machine interface, so that the corresponding welding machine can weld the tail of the previous coil of strip and the head of the next coil of strip in the welding area of ​​the continuous strip production line based on the first target operating current.

[0006] In some implementations, after the controller sends a first target operating current to the corresponding welding machine through each welding machine interface, the method provided in this application further includes: The touch screen receives the current adjustment amount of at least one target welding machine among multiple welding machines from the user, and transmits the current adjustment amount of the target welding machine to the controller; The controller adjusts the first target operating current of at least one target welding machine through the welding machine interface corresponding to at least one target welding machine and the current adjustment amount of at least one target welding machine.

[0007] In some embodiments, the strip welding machine control equipment further includes a strip thickness detector electrically connected to the controller, and the method provided in this application further includes: When the strip welding machine control equipment is in the second working mode, and the continuous strip production line is in welding condition, the controller receives the thickness of the next coil of strip located in the welding area of ​​the continuous strip production line from the strip thickness detector. The controller determines the lower limit welding current based on the greater of the thickness of the next coil of strip and the pre-recorded thickness of the previous coil of strip. The controller determines the upper limit current for welding based on the smaller of the thickness of the next coil of strip and the pre-recorded thickness of the previous coil of strip. The controller controls one welding machine through each welding machine interface to weld the tail of the previous coil of strip and the head of the next coil of strip based on a second target working current, wherein the value of the second target working current is between the lower limit welding current and the upper limit welding current.

[0008] In some embodiments, the strip welding machine control equipment further includes an image acquisition module communicatively connected to the controller. After the controller controls one welding machine through each welding machine interface to weld the tail end of the previous coil of strip and the head end of the next coil of strip based on a second target operating current, the method provided in this application further includes: After a preset welding time has elapsed, the controller controls the image acquisition module to take pictures of the weld joints at the tail end of the previous coil and the head end of the next coil. The controller receives images of the weld area captured by the image acquisition module. The controller identifies whether the weld point corresponding to any welding machine is fully welded or burned through based on the image of the weld. If the weld point corresponding to one of the welding machines is not fully welded, the controller increases the second target operating current of one of the welding machines through the welding machine interface corresponding to that welding machine. If the solder joint corresponding to one of the welding machines is burned through, the controller reduces the second target operating current of one of the welding machines through the welding machine interface corresponding to that welding machine.

[0009] In some implementations, the controller identifies whether a weld point corresponding to any welding machine has been fully penetrated or burned through based on the image of the weld joint, including: The controller is based on a pre-trained welding quality recognition model to identify whether the weld point corresponding to any welding machine is fully penetrated or burned through. The welding quality recognition model is obtained by inputting multiple training samples into the network to be trained. Each training sample is a historical weld point image labeled with a welding quality type label, which is used to represent fully penetrated, not fully penetrated, burned through, or not burned through.

[0010] In some embodiments, the strip welding machine control equipment further includes a voltage detection module electrically connected to the controller. The voltage acquisition terminal of the voltage detection module is connected between each welding machine interface and the controller. The method provided in this application also includes: The controller receives voltage data corresponding to each welding machine interface collected by the voltage detection module. When the controller determines that the voltage data corresponding to any welding machine interface is abnormal, it outputs a prompt message indicating that the voltage data corresponding to the welding machine interface is abnormal to the touch screen.

[0011] Secondly, this application provides a strip welding machine control device, including a controller, a touch screen and multiple welding machine interfaces. The controller is communicatively connected to the touch screen and the multiple welding machine interfaces. Each welding machine interface is used to connect to a welding machine. The strip welding machine control device is used to execute the method provided in the first aspect of this application.

[0012] In some implementations, each welding machine interface is connected to the controller via a CAN interface communication line.

[0013] In some implementations, a CAN interface isolation module is connected between each CAN interface communication line and the controller.

[0014] In some implementations, the strip welding machine control equipment also includes a multiplexed channel selection circuit. The controller is electrically connected to the multiplexed channel selection circuit via a CAN interface communication line, and the controller is also electrically connected to the controller via a channel selection address line.

[0015] Thirdly, this application also provides a storage medium storing a computer program, which, when executed by a processor, causes the computer to perform the method executed by the controller as described in the first aspect of this application.

[0016] Fourthly, this application also provides a computer program product, including a computer program that, when run, causes a strip welding machine control device to perform the method executed by the controller in the first aspect of this application.

[0017] This application provides a strip steel welding machine control method and equipment. In response to the user's confirmation operation of the first target working current, the touch screen sends the first target working current to the controller. The controller sends the first target working current to the corresponding welding machine through each welding machine interface, so that the corresponding welding machine can weld the tail of the previous strip steel and the head of the next strip steel in the welding area of ​​the continuous strip steel production line based on the first target working current. This achieves "one-click" unified adjustment of the current of multiple welding machines, which is time-saving, efficient, and can meet normal welding needs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A circuit module connection block diagram of the strip welding machine control equipment provided in the embodiments of this application; Figure 2 A flowchart of a strip welding machine control method provided in an embodiment of this application; Figure 3 One of the schematic diagrams of the display interface of the touch screen provided in the embodiments of this application; Figure 4 A second schematic diagram of the display interface of the touch screen provided in the embodiments of this application. Figure 5 A schematic diagram of the structure of the welding machine and the previous and next coils of strip steel provided in the embodiments of this application; Figure 6 A circuit diagram of the controller provided in the embodiments of this application; Figure 7 A circuit diagram of a touch screen provided in an embodiment of this application; Figure 8 This is a circuit diagram of the CAN interface isolation module provided in an embodiment of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.

[0021] The technical solutions of this application and how they solve the aforementioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0022] This application provides a strip welding machine control method, applied to strip welding machine control equipment. For example... Figure 1 As shown, the strip welding machine control equipment includes a controller, a touch screen (such as a programmable serial port touch screen connected via a TTL serial cable), a strip thickness detector, and multiple welding machine interfaces. The controller is communicatively connected to the strip thickness detector, the touch screen, and the multiple welding machine interfaces. Each welding machine interface is used to connect to one welding machine. For example, the controller can be, but is not limited to, a microcontroller chip, such as the AT90CAN128 chip. The number of welding machine interfaces can be, but is not limited to, 12, 16, etc., and is not limited here. Each welding machine can be, but is not limited to, an argon arc welding machine. Figure 2 As shown, the method provided in this application embodiment includes: S201: When the strip welding machine control equipment is in the first working mode, the touch screen receives the first target working current input by the user.

[0023] S202: In response to the user's confirmation operation of the first target operating current, the touch screen sends the first target operating current to the controller; S203: The controller sends a first target operating current to the corresponding welding machine through each welding machine interface, so that the corresponding welding machine welds the tail of the previous coil of strip and the head of the next coil of strip in the welding area of ​​the continuous strip production line based on the first target operating current.

[0024] In some implementations, after S203, the method provided in this application embodiment further includes: Step A1: The touch screen receives the current adjustment amount of at least one target welding machine among multiple welding machines from the user, and transmits the current adjustment amount of the target welding machine to the controller.

[0025] Step A2: The controller adjusts the first target operating current of at least one target welding machine through the welding machine interface corresponding to at least one target welding machine and the current adjustment amount of at least one target welding machine.

[0026] like Figure 3As shown, the touchscreen display area includes a current adjustment area 401, a welding machine interface status display area 404, a current confirmation control, and advanced setting controls. The welding machine interface status display area 404 includes the welding machine interface statuses of welding machine interfaces W1-W12. The current adjustment area 401 includes a current increase control 402 and a current decrease control 403. The user can input a first target operating current through the current increase control 402 or the current decrease control 403 and trigger the current confirmation control. The touchscreen responds to the user's confirmation of the first target operating current by sending the first target operating current to the controller. The controller then controls one welding machine 303 through each welding machine interface to weld the tail of the previous coil of strip steel 301 and the head of the next coil of strip steel 302 based on the first target operating current. This allows the user to uniformly adjust the first target operating current of the welding machines 303 corresponding to multiple welding machine interfaces, resulting in high efficiency.

[0027] After step A2, the method provided in this application embodiment may further include: Step A3: The touch screen receives the current adjustment amount of at least one target welding machine among multiple welding machines from the user, and transmits the current adjustment amount of the target welding machine to the controller; Step A4: The controller adjusts the first target operating current of at least one target welding machine through the welding machine interface corresponding to at least one target welding machine and the current adjustment amount of at least one target welding machine. For example, such as Figure 4 As shown, the user can trigger Figure 3 The advanced settings controls in the interface switch the touchscreen to display the current compensation interface 501. The current compensation interface 501 displays the serial numbers of multiple welding machines 303 and their corresponding current adjustment input areas. The user can input the current adjustment amount in the current adjustment input area next to the serial number of the target welding machine. For example... Figure 4 As shown, the current adjustment amount "1" can be input into welding machine 303, the current adjustment amount "-1" can be input into welding machine 403, the current adjustment amount "-2" can be input into welding machine 703, and the current adjustment amount "3" can be input into welding machine 1003. Then, the current adjustment amount of each target welding machine is transmitted to the controller. The controller adjusts the first target working current of at least one target welding machine through the welding machine interface corresponding to at least one target welding machine and the current adjustment amount of at least one target welding machine.

[0028] In summary, the strip welding machine control method provided in this application allows the touchscreen to respond to the user's confirmation of a first target operating current and send the first target operating current to the controller. The controller then sends the first target operating current to the corresponding welding machine through each welding machine interface, enabling the corresponding welding machine to weld the tail end of the previous coil and the head end of the next coil of strip located in the welding area of ​​the continuous strip production line based on the first target operating current. This achieves "one-click" unified adjustment of the current of multiple welding machines, is time-efficient, and can meet normal welding requirements. In addition, the method provided in the embodiments of this application includes: Step B1: When the strip welding machine control equipment is in the second working mode, and the continuous strip production line is in welding condition, the controller receives the thickness of the next coil of strip located in the welding area of ​​the continuous strip production line from the strip thickness detector.

[0029] For example, the strip thickness detector may be, but is not limited to, a label scanning module, which is used to scan the label on the next roll of strip to obtain the thickness of the next roll of strip.

[0030] Step B2: The controller determines the lower limit welding current based on the larger of the thickness of the next coil of strip and the pre-recorded thickness of the previous coil of strip.

[0031] For example, if the thickness of the next coil of strip is 0.25 cm and the thickness of the previous coil is 0.20 cm, then the lower limit welding current is determined based on the thickness of the next coil, and the greater the thickness of the next coil, the greater the determined lower limit welding current. As another example, if the thickness of the next coil of strip is 0.15 cm and the thickness of the previous coil is 0.20 cm, then the lower limit welding current is determined based on the thickness of the previous coil, and the greater the thickness of the previous coil, the greater the determined lower limit welding current.

[0032] Step B3: The controller determines the upper limit current for welding based on the smaller of the thickness of the next roll of strip and the pre-recorded thickness of the previous roll of strip.

[0033] For example, if the thickness of the next coil of strip is 0.25 cm and the thickness of the previous coil is 0.20 cm, then the upper limit current for welding is determined based on the thickness of the previous coil, and the smaller the thickness of the previous coil, the smaller the upper limit current for welding. As another example, if the thickness of the next coil of strip is 0.15 cm and the thickness of the previous coil is 0.20 cm, then the upper limit current for welding is determined based on the thickness of the next coil, and the smaller the thickness of the next coil, the smaller the upper limit current for welding.

[0034] Step B4: The controller controls one welding machine through each welding machine interface to weld the tail of the previous coil of strip and the head of the next coil of strip based on the first target working current, wherein the value of the first target working current is between the lower limit welding current and the upper limit welding current.

[0035] For example, such as Figure 5 As shown, multiple welding machines 303 are arranged in two rows, each row including multiple welding machines 303 spaced apart. One row of welding machines 303 is located on one side of the tail end of the previous coil of strip 301, and the other row of welding machines 303 is located on one side of the head end of the next coil of strip 302. In this way, welding of the tail end and the head end of the previous coil of strip 301 can be reliably achieved. It can be understood that when the value of the first target working current is between the lower limit current and the upper limit current of welding, it can be ensured that the thicker coil of strip is melted through, while the thinner coil of strip is prevented from being burned through, further improving the reliability of welding.

[0036] In this way, the lower welding current can be determined by taking the larger value between the thickness of the subsequent strip 302 and the pre-recorded thickness of the previous strip 301; the upper welding current can be determined by taking the smaller value between the thickness of the subsequent strip 302 and the pre-recorded thickness of the previous strip 301. Then, each welding machine interface controls a welding machine 303 to weld the tail and head of the previous strip 301 based on the second target operating current, where the value of the second target operating current is between the lower and upper welding current limits. This allows for the automated determination of the second target operating current for each welding machine 303 based on the thicknesses of the previous and subsequent strip 302, eliminating the need for frequent manual adjustments by operators, improving the adjustment efficiency of the second target operating current for each welding machine 303, and meeting normal welding requirements.

[0037] In addition, the strip welding machine control equipment also includes an image acquisition module that is communicatively connected to the controller. After S204 above, the method provided in this application embodiment further includes: Step C1: After a preset time (e.g., 6 minutes), the controller controls the image acquisition module to take pictures of the weld joints at the tail of the previous strip 301 and the head of the next strip 302.

[0038] Step C2: The controller receives the image of the weld obtained by the image acquisition module.

[0039] Step C3: The controller identifies whether the weld point corresponding to any welding machine 303 is fully welded or burned through based on the image of the welded area.

[0040] Specifically, the controller can identify whether the weld point corresponding to any welding machine 303 is fully penetrated or burned through based on a pre-trained welding quality recognition model. The welding quality recognition model is obtained by inputting multiple training samples into the network to be trained. Each training sample is a historical weld point image labeled with a welding quality type label, which is used to represent fully penetrated, not fully penetrated, burned through, or not burned through.

[0041] It should be noted that the network to be trained can be, but is not limited to, a convolutional neural network. A convolutional neural network may include an input layer, a second convolutional layer, a second pooling layer, a second convolutional layer, a second pooling layer, a fully connected layer, and an output layer. The second convolutional layer includes 64 convolutional kernels, each with a size of 3×3, and uses the ReLU activation function. The second pooling layer is a 1D convolutional layer with a pooling window size of 2. Alternatively, the second convolutional layer may include 128 convolutional kernels, each with a size of 3×3, and uses the ReLU activation function. The second pooling layer is also a 1D convolutional layer with a pooling window size of 2. The fully connected layer is a Dense layer containing 50 neurons and uses the ReLU activation function. The output layer uses a linear activation function.

[0042] Step C4: If the weld point corresponding to one of the welding machines 303 is not fully welded, the controller increases the second target operating current of one of the welding machines 303 through the welding machine interface corresponding to one of the welding machines 303.

[0043] Understandably, increasing the second target operating current of one of the welding machines 303 can ensure that the weld point corresponding to one of the welding machines 303 is fully penetrated, thereby improving the reliability of the welding.

[0044] Step C5: If the solder joint corresponding to one of the welding machines 303 is burned through, the controller reduces the second target operating current of one of the welding machines 303 through the welding machine interface corresponding to one of the welding machines 303.

[0045] Understandably, reducing the second target operating current of one of the welding machines 303 can ensure that the weld point corresponding to one of the welding machines 303 is fully penetrated, thereby improving the reliability of the welding.

[0046] Still Figure 1As shown, the strip welding machine control equipment also includes a voltage detection module and a touch screen electrically connected to the controller. The voltage acquisition terminal of the voltage detection module is connected between each welding machine interface and the controller. The method provided in this embodiment further includes: the controller receiving voltage data corresponding to each welding machine interface acquired by the voltage detection module; when the controller determines that the voltage data corresponding to any welding machine interface is abnormal (e.g., large fluctuations, voltage too high, or voltage too low), it outputs a prompt message indicating that the voltage data of the corresponding welding machine interface is abnormal to the touch screen. In this way, it can prompt the operator which welding machine interface's voltage data is abnormal, facilitating maintenance.

[0047] In addition, as before Figure 1 As shown in the figure, this application embodiment also provides a strip welding machine control device, including a controller, a touch screen, a strip thickness detector and multiple welding machine interfaces. The controller is communicatively connected to the strip thickness detector, the touch screen and the multiple welding machine interfaces respectively. Each welding machine interface is used to connect to a welding machine 303. The strip welding machine control device is used to execute the method provided in the above embodiment of this application.

[0048] Specifically, each welding machine interface can communicate with the controller through a CAN interface communication line, realizing point-to-point communication between the controller and multiple welding machine interfaces, avoiding communication logic confusion, and ensuring that the normal communication of other welding machine interfaces is not affected when a single welding machine interface fails.

[0049] Furthermore, the controller can be powered by an external AC220V power supply circuit.

[0050] Furthermore, each CAN interface communication line is connected to a CAN interface isolation module. This prevents mutual interference and influence between welding machines 303 and between welding machines 303 and the controller.

[0051] In addition, the strip welding machine control equipment also includes a multiplexed channel selection circuit. The controller is electrically connected to the multiplexed channel selection circuit via a CAN interface communication line, and the controller is also electrically connected to the controller via a channel selection address line. This allows for the scanning of the working status of each welding machine interface and the transmission of this data to the touchscreen display, enabling timely detection of welding machine fault 303 to ensure normal production.

[0052] Additionally, it should be noted that the circuit of the controller provided in the embodiments of this application can be as follows: Figure 6 As shown, the circuit of the touch screen provided in this application embodiment can be as follows: Figure 7 As shown, the circuit of the CAN interface isolation module provided in this application embodiment can be as follows: Figure 8 As shown.

[0053] Furthermore, the aforementioned controller may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed through integrated logic circuits in the processor's hardware or through software instructions. The aforementioned controller can be a general-purpose processor, including a Central Processing Unit (CPU), a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory; the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0054] In addition, embodiments of this application also provide a storage medium storing a computer program, which, when executed by a processor, causes the computer to perform the method executed by the controller as described in the first aspect of this application.

[0055] Furthermore, storage media, including permanent and non-permanent, removable and non-removable media, can be used to store information by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0056] In addition, this application also provides a computer program product, including a computer program that, when run, causes a strip welding machine control device to perform a method as executed by the controller in the above embodiments of this application.

[0057] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0058] In summary, the above descriptions are merely preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A control method for a strip steel welding machine, characterized in that, A method for controlling a strip steel welding machine includes a controller, a touch screen, and multiple welding machine interfaces. The controller is communicatively connected to the touch screen and the multiple welding machine interfaces, and each welding machine interface is used to connect to a welding machine. When the strip welding machine control equipment is in the first working mode, the touch screen receives the first target working current input by the user; In response to the user's confirmation operation of the first target operating current, the touch screen sends the first target operating current to the controller; The controller sends a first target operating current to the corresponding welding machine through each welding machine interface, so that the corresponding welding machine welds the tail end of the previous coil of strip and the head end of the next coil of strip in the welding area of ​​the continuous strip production line based on the first target operating current.

2. The method according to claim 1, characterized in that, After the controller sends a first target operating current to the corresponding welding machine through each of the welding machine interfaces, the method further includes: The touch screen receives the current adjustment amount of at least one target welding machine among multiple welding machines from the user, and transmits the current adjustment amount of the target welding machine to the controller; The controller adjusts the first target operating current of at least one of the target welding machines through the welding machine interface corresponding to the at least one target welding machine and the current adjustment amount of the at least one target welding machine.

3. The method according to claim 1, characterized in that, The strip welding machine control equipment further includes a strip thickness detector electrically connected to the controller, and the method further includes: When the strip welding machine control equipment is in the second working mode, and the continuous strip production line is in welding condition, the controller receives the thickness of the next coil of strip located in the welding area of ​​the continuous strip production line from the strip thickness detector. The controller determines the lower limit welding current based on the larger of the thickness of the subsequent coil of strip and the pre-recorded thickness of the previous coil of strip. The controller determines the upper limit welding current based on the smaller of the thickness of the subsequent coil of strip and the pre-recorded thickness of the previous coil of strip. The controller controls one of the welding machines through each welding machine interface to weld the tail end of the previous coil of strip and the head end of the next coil of strip based on a second target operating current, wherein the value of the second target operating current is between the lower limit welding current and the upper limit welding current.

4. The method according to claim 3, characterized in that, The strip welding machine control equipment further includes an image acquisition module communicatively connected to the controller. After the controller controls one welding machine through each welding machine interface to weld the tail end of the previous strip and the head end of the next strip based on a second target operating current, the method further includes: After a preset welding time has elapsed, the controller controls the image acquisition module to take pictures of the weld joint at the tail end of the previous coil of strip and the head end of the next coil of strip. The controller receives the weld image obtained by the image acquisition module; The controller identifies, based on the image of the weld, whether any weld point corresponding to the welding machine is fully welded or burned through. If the weld point corresponding to one of the welding machines is not fully welded, the controller increases the second target operating current of one of the welding machines through the welding machine interface corresponding to that welding machine. If the solder joint corresponding to one of the welding machines is burned through, the controller reduces the second target operating current of one of the welding machines through the welding machine interface corresponding to that welding machine.

5. The method according to claim 4, characterized in that, The controller identifies whether a weld point corresponding to any welding machine has been fully penetrated or burned through based on the image of the welded area, including: The controller, based on a pre-trained welding quality recognition model, identifies whether a weld point corresponding to any welding machine is fully penetrated or burned through. The welding quality recognition model is obtained by inputting multiple training samples into the network to be trained. Each training sample is a historical weld point image labeled with a welding quality type label, which is used to represent fully penetrated, not fully penetrated, burned through, or not burned through.

6. The method according to claim 1, characterized in that, The strip welding machine control equipment further includes a voltage detection module electrically connected to the controller. The voltage acquisition terminal of the voltage detection module is connected between each welding machine interface and the controller. The method further includes: The controller receives voltage data corresponding to each welding machine interface collected by the voltage detection module; When the controller determines that the voltage data corresponding to any welding machine interface is abnormal, it outputs a prompt message to the touch screen indicating that the voltage data corresponding to the welding machine interface is abnormal.

7. A strip steel welding machine control device, characterized in that, The device includes a controller, a touch screen, and multiple welding machine interfaces. The controller is communicatively connected to the touch screen and the multiple welding machine interfaces. Each welding machine interface is used to connect to a welding machine. The strip welding machine control device is used to execute the method described in any one of claims 1-6.

8. The strip welding machine control equipment according to claim 7, characterized in that, Each of the welding machine interfaces is connected to the controller via a CAN interface communication line.

9. The strip welding machine control equipment according to claim 8, characterized in that, Each CAN interface communication line is connected to a CAN interface isolation module between itself and the controller.

10. The strip welding machine control equipment according to claim 7, characterized in that, The strip welding machine control equipment also includes a multiplexed channel selection circuit. The controller is electrically connected to the multiplexed channel selection circuit via a CAN interface communication line. The controller is also electrically connected to the controller via a channel selection address line.

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