Weld seam tracking method and system on continuous strip processing production line

Abstract

The present application relates to a weld tracking method and system on a continuous processing production line of steel strip, the method comprising: dividing and preprocessing the simulated production line on the production line screen model through a host computer, obtaining model data of different tracking sections and sending them to a controller; the controller obtains the entry length of the weld of the current steel strip on the continuous processing production line, and determines the actual position of the weld in the target tracking section according to the actual length measured for each tracking section on the continuous processing production line; the controller determines the screen position of the weld according to the actual position of the weld of the current steel strip in the target tracking section and the model data of the target tracking section, and displays the screen position of the weld in real time on the production line screen model through the host computer. The present application completes the calculation work involved in the weld tracking method in the controller, which is convenient for function encapsulation and function protection, and improves the data refresh efficiency of the host computer.

Description

Technical Field

[0001] The present application relates to the technical field of strip steel production monitoring, and in particular to a weld tracking method and system on a strip steel continuous processing production line. Background Art

[0002] In recent years, with the continuous development and technological progress of the steel industry, more automated and intelligent control requirements have been proposed in new continuous production lines and project transformations, and weld tracking is a more representative example. At present, there are some problems and difficulties in the actual production process of production personnel and managers, and they have proposed a lot of improvements and upgrades, and weld tracking is one of them. Due to its technical difficulty and complexity of implementation, only a few large state-owned enterprises and foreign companies have some functional implementation methods based on Siemens' original related technologies. Therefore, as market competition becomes more and more severe, ordinary production units naturally have to make independent improvements and upgrades at the technical level. Summary of the invention

[0003] Based on the above description, the present application provides a weld tracking method and system on a continuous strip processing production line. By placing the main work of coordinate tracking calculation involved in the weld tracking method in the controller, it is convenient for function encapsulation and function protection to prevent program data leakage. In addition, the host computer only displays the production line screen model, reducing the programming work on the host computer side, thereby reducing data loading and improving data refresh efficiency.

[0004] According to a first aspect, the present application provides a weld tracking method on a strip steel continuous processing production line, which is applied between a controller and a host computer of a weld tracking system, and includes: The host computer divides and preprocesses the simulated production line on the production line screen model, obtains model data of different tracking sections and sends them to the controller; The controller obtains the entry length of the weld of the current strip steel on the continuous processing production line, and determines the actual position of the weld in the target tracking section according to the actual length measured for each of the different tracking sections on the continuous processing production line; The controller determines the screen position of the weld according to the actual position of the weld of the current strip in the target tracking section and the model data of the target tracking section, and displays the screen position of the weld in real time on the production line screen model through the host computer.

[0005] In one or more embodiments, the controller obtains the entry length of the weld of the current strip steel on the continuous processing production line, and determines the actual position of the weld in the target tracking section according to the actual length of each tracking section on the continuous processing production line, including: Determine the target tracking section where the weld is located according to the entry length of the weld of the current strip steel and the actual length of each tracking section; The entry ratio of the weld in the target tracking section is determined and used as the actual position of the weld in the target tracking section.

[0006] In one or more embodiments, the classifying and preprocessing the simulated production line on the production line screen model by the host computer includes: The simulated production line is divided according to the line type, and the incomplete semicircle is simplified to obtain a line segment type tracking section and an arc type tracking section; Acquire geometric data of each of the tracking sections, the geometric data including the starting point coordinates, the ending point coordinates, the model length, direction, angle and / or radius of the tracking section; The geometric data of each tracking section is transformed to obtain the model data of each tracking section, wherein the model data refers to the data used for coordinate transformation of the actual position of the weld.

[0007] In one or more embodiments, when classifying the simulated production line on the production line screen model, it also includes: simplifying the tracking section of the incomplete semicircular arc.

[0008] In one or more embodiments, the controller determines the screen position of the weld according to the actual position of the weld of the current strip steel in the target tracking section and the model data of the target tracking section, including: Assigning the model data of the target tracking section to the weld tracking function corresponding to the target tracking section to obtain a coordinate transformation model corresponding to the target tracking section; The screen position of the weld is determined according to the actual position of the weld of the current steel strip in the target tracking section and the coordinate transformation model corresponding to the target tracking section.

[0009] In one or more embodiments, it also includes: different weld tracking functions are encapsulated in the controller, a linear weld tracking function is preset for a line segment type tracking section, and a trigonometric function form of weld tracking function is preset for an arc type tracking section.

[0010] In one or more embodiments, the ratio of the actual length of each tracking section on the continuous processing line to the model length in the line screen model is the display ratio; the display ratios of the various tracking sections are set to be the same or different.

[0011] In one or more embodiments, before the controller obtains the entry length of the weld of the current strip steel on the continuous processing production line, it also includes: the host computer obtains the actual loop amount set for the loop on the continuous processing production line, and updates the start and end positions and model length of the tracking section corresponding to the loop area in the production line screen model.

[0012] In one or more embodiments, it also includes: the controller obtains the entry length of the new weld on the current strip on the continuous processing production line, and the controller simultaneously tracks and calculates multiple welds, so that the host computer simultaneously displays the screen positions of multiple welds on the production line screen model.

[0013] According to a second aspect, the present application provides a weld tracking system on a strip steel continuous processing production line, comprising: a host computer and a controller; The host computer is used to divide and pre-process the simulated production line on the production line screen model, obtain model data of different tracking sections and send them to the controller; Classifying and simplifying the simulated production lines on the production line screen model to obtain geometric model data of different tracking sections, so as to establish coordinate transformation models of each tracking section and send them to the controller; The controller is used to obtain the entry length of the weld of the current strip steel on the continuous processing production line, and determine the actual position of the weld in the target tracking section according to the actual length measured for each tracking section on the continuous processing production line; The controller is also used to determine the screen position of the weld according to the actual position of the weld of the current strip steel in the target tracking section and the coordinate transformation model of the target tracking section, and to display the screen position of the weld in real time on the production line screen model through the host computer.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: In the above-mentioned weld tracking method and system on the continuous processing production line of strip steel, the simulated production line on the production line screen model is divided and preprocessed by the host computer, and the model data of different tracking sections are obtained and sent to the controller. The controller obtains the entry length of the weld of the current strip steel on the continuous processing production line, and determines the actual position of the weld in the target tracking section according to the actual length measured for each tracking section on the continuous processing production line; the screen position of the weld is determined according to the actual position of the weld of the current strip steel in the target tracking section and the model data of the target tracking section, and the screen position of the weld is displayed in real time on the production line screen model through the host computer. In this way, the main work of coordinate tracking calculation involved in the weld tracking method is completed in the controller, which is convenient for function encapsulation and function protection to prevent program data leakage, and the host computer is mainly used to display the production line screen model, reducing the programming work on the host computer side, thereby reducing data loading and improving data refresh efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic flow chart of a weld tracking method on a strip steel continuous processing production line provided in one embodiment of the present application; Figure 2 This is a flow chart of step S102 in the embodiment of the present application; Figure 3 This is a flow chart of step S101 in the embodiment of the present application; Figure 4 This is a flow chart of step S103 in the embodiment of the present application; Figure 5a Schematic diagram of coordinate transformation of four line segments in the embodiment of the present application; Figure 5b Schematic diagram of coordinate conversion of four clockwise arcs in the embodiment of the present application; Figure 5c Schematic diagram of coordinate conversion of four counterclockwise arcs in the embodiment of the present application; Figure 6 A schematic diagram of the principle of a weld tracking system on a strip steel continuous processing production line provided in an embodiment of the present application. DETAILED DESCRIPTION

[0016] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0018] See also Figure 1 , Figure 1 A schematic flow chart of a weld tracking method on a strip steel continuous processing production line provided by an embodiment of the present application is shown. A weld tracking method on a strip steel continuous processing production line provided by an embodiment of the present application is applied between a controller and a host computer of a weld tracking system. The method comprises the following steps: S101, dividing and preprocessing the simulated production line on the production line screen model through the host computer, obtaining model data of different tracking sections and sending them to the controller; S102, the controller obtains the entry length of the weld of the current strip steel on the continuous processing production line, and determines the actual position of the weld in the target tracking section according to the actual length measured for each tracking section on the continuous processing production line; S103, the controller determines the screen position of the weld according to the actual position of the weld of the current strip steel in the target tracking section and the model data of the target tracking section, and displays the screen position of the weld in real time on the production line screen model through the host computer.

[0019] It should be noted that the weld tracking system includes hardware devices such as a controller, various sensing devices, and a host computer. The controller can be a PLC controller. According to the sufficient function calculation and high-level language programming capabilities of the PLC, in this embodiment, 99% of the calculation tracking and coordinate calculation work is completed in the PLC, which is convenient for function packaging and function protection.

[0020] The continuous processing production line is equipped with continuous units, including uncoilers, welding machines or stitching machines, speed measuring equipment, S rollers, round rollers, various processing sections (for example, brushing sections, pickling sections, coating sections, cooling sections, etc.), winders, etc. According to the process requirements, the unit equipment on the continuous processing line is reasonably configured, and this embodiment is not limited here. The production line screen model refers to the HMI screen model of the simulated production line built on the host computer through the winCC software, which is convenient for monitoring and viewing the movement process of the strip weld. The simulated production line refers to the production line that simulates the continuous processing production line. In the production line screen model, the simulated production line is divided into multiple tracking sections to facilitate tracking and calculation of the weld. The model data of the tracking section refers to the data used for coordinate conversion of the actual position of the weld.

[0021] The simulated production line on the production line screen model is divided and preprocessed by the host computer to obtain the model data of different tracking sections. The host computer sends the model data of each tracking section to the controller through the communication module. The controller obtains the actual length measured for each tracking section on the continuous processing production line. In this embodiment, when measuring the actual length of each tracking section, a strip steel can be passed through a continuous unit. Specifically, after the strip steel is spot welded or seam welded in the welding machine or the sewing machine, a weld is generated, and the real-time moving speed of the weld tracking point is obtained by the speed measuring device, and the moment when the weld on the strip steel enters each unit equipment and the moment when it exits each unit equipment is monitored by the sensor. Through the real-time moving speed and moving time, the moving length of the weld tracking point can be calculated in real time, thereby calculating the travel of the weld tracking point in each unit equipment and the interval length between each unit equipment. At the same time, according to the division method of each tracking section on the continuous processing production line, the actual length of each tracking section is determined, and the accuracy is at the millimeter level.

[0022] Specifically, after the unwinder outputs the strip and the welder or stitching machine welds the weld, the sensing device obtains the weld tracking point of the current strip on the continuous processing production line, and tracks and calculates the length of the weld tracking point entering the continuous unit. The controller obtains the entry length of the weld of the current strip on the continuous processing production line, and determines the actual position of the weld in the target tracking section based on the actual length measured for each tracking section on the continuous processing production line. Then, based on the actual position of the weld of the current strip in the target tracking section and the model data of the target tracking section, the screen position of the weld is determined, and the screen position of the weld is displayed in real time on the production line screen model through the host computer, that is, the movement of the entire weld is displayed in real time.

[0023] In the weld tracking scheme of the related art, the main work of coordinate tracking calculation is placed on the host computer. In order to simplify the calculation, too many tracking areas are fuzzy processed, so that the tracking cannot be accurate in real time. Compared with the weld tracking scheme of the related art, in this embodiment, the host computer divides and preprocesses the simulated production line on the production line screen model, obtains the model data of different tracking sections and sends it to the controller; the controller obtains the entry length of the weld of the current strip on the continuous processing production line, and determines the actual position of the weld in the target tracking section based on the actual length measured for each tracking section on the continuous processing production line; the controller determines the screen position of the weld based on the actual position of the weld of the current strip in the target tracking section and the model data of the target tracking section, and displays the screen position of the weld in real time on the production line screen model through the host computer. In this way, the main work of coordinate tracking calculation in the weld tracking method is completed in the controller, which is convenient for function encapsulation and function protection to prevent program data leakage. In addition, the host computer is mainly used to display the production line screen model, reducing the programming work on the host computer side, thereby reducing data loading, improving data refresh efficiency, and accurately displaying the movement of the weld in real time.

[0024] Figure 2 A schematic diagram of the method flow of step S102 in an embodiment of the present application is shown.

[0025] See also Figure 2 In some embodiments, in step S102, the controller obtains the entry length of the weld of the current strip on the continuous processing production line, and determines the actual position of the weld in the target tracking section according to the actual length of each tracking section on the continuous processing production line, including the following steps: S201, determining the target tracking section where the weld is located according to the entry length of the weld of the current strip steel and the actual length of each tracking section; S202, determining the entry ratio of the weld in the target tracking section, and using it as the actual position of the weld in the target tracking section.

[0026] Specifically, according to the entry length of the weld of the current strip and the actual length of each tracking section, the target tracking section where the weld is located and the length occupied by the weld in the target tracking section are determined, thereby determining the entry proportion of the weld in the target tracking section. In this way, it is convenient to determine the screen position of the weld according to the entry proportion of the weld in the target tracking section and the model data of the target tracking section.

[0027] See also Figure 3 , Figure 3 A flow chart of step S101 in an embodiment of the present application is shown.

[0028] In some embodiments, the step S101 of dividing and preprocessing the simulated production line on the production line screen model by the host computer includes: S301, dividing the simulated production line according to the line type, and simplifying the incomplete semicircle to obtain a line segment-type tracking section and an arc-type tracking section; Specifically, in this embodiment, the simulated production line is divided into various tracking sections, and each tracking section has a unique type, such as a line segment type or an arc type. For example, the scrubbing section on the simulated production line is divided into a line segment type tracking section, and the S roller on the simulated production line is divided into two semi-arc type tracking sections and one line segment type tracking section. Based on this principle, the simulated production line is divided into different tracking sections. In this way, according to the two types of line segments and arcs, each tracking section on the simulated production line is determined as a two-dimensional line segment or arc, which is convenient for subsequent unified classification calculation.

[0029] Furthermore, when dividing the simulated production line on the production line screen model, it also includes: simplifying the tracking section of the incomplete semicircle. Specifically, by simplifying some incomplete semicircle arcs, for example, simplifying arcs greater than 1 / 4 to semicircles, simplifying arcs less than or equal to 1 / 4 to right angles, etc., the calculation of subsequent tracking point coordinates is more standardized, and the display of the production line screen model is smoother.

[0030] S302, obtaining geometric data of each tracking segment, the geometric data including the starting point coordinates, the ending point coordinates, the model length, direction, angle and / or radius of the tracking segment; Specifically, after building the production line screen model in the WinCC software, the geometric data of the simulated production line will be generated, and the geometric data of each tracking segment will be obtained based on the division and simplification results of the simulated production line. The geometric data of the line segment type tracking segment includes the starting point coordinates, end point coordinates, model length, direction and angle of the tracking segment; the geometric data of the arc type tracking segment includes the starting point coordinates, end point coordinates, model length, direction, angle and radius of the tracking segment.

[0031] S303, transforming the geometric data of each tracking section to obtain the model data of each tracking section, where the model data refers to the data used for coordinate transformation of the actual position of the weld.

[0032] It should be noted that the model data is used to assign values ​​to the weld tracking function encapsulated by the controller, and is used for coordinate conversion of the actual position of the weld.

[0033] Specifically, according to the direction of the line-segment type tracking segment, the quadrant in which the line-segment type tracking segment is located in the model coordinate system and the corresponding weld tracking function are determined, and according to the starting point coordinates, end point coordinates and angle of the line-segment type tracking segment, the linear constant of the line-segment type tracking segment is determined, which is used to assign the weld tracking function of the line-segment type tracking segment to obtain the coordinate transformation model corresponding to the line-segment type tracking segment. According to the direction of the arc-type tracking segment, it is determined whether the arc-type tracking segment rotates counterclockwise or clockwise, and the rotation angle, so as to determine the quadrant in which the arc-type tracking segment is located in the model coordinate system and the corresponding weld tracking function, and the radius of the arc-type tracking segment is assigned to the weld tracking function of the arc-type tracking segment to obtain the coordinate transformation model corresponding to the arc-type tracking segment.

[0034] See also Figure 4 , Figure 5a to Figure 5c , Figure 4 A schematic diagram of the process of step S103 in an embodiment of the present application is shown; Figure 5a Schematic diagram of coordinate transformation of four line segments in the embodiment of the present application is shown. Figure 5b Schematic diagrams showing coordinate transformation of four clockwise arcs in the embodiment of the present application are shown. Figure 5c Schematic diagrams of coordinate transformation of four counterclockwise arcs in embodiments of the present application are shown.

[0035] In some embodiments, the controller in step S103 determines the screen position of the weld according to the actual position of the weld of the current strip in the target tracking section and the model data of the target tracking section, including: S401, assigning the model data of the target tracking section to the weld tracking function corresponding to the target tracking section to obtain a coordinate transformation model corresponding to the target tracking section; S402, determining the screen position of the weld according to the actual position of the weld of the current steel strip in the target tracking section and the coordinate transformation model corresponding to the target tracking section.

[0036] Specifically, in this embodiment, different weld tracking functions are encapsulated in the controller. For line segment-type tracking sections, a linear weld tracking function is preset, and for arc-type tracking sections, a trigonometric weld tracking function is preset.

[0037] Specifically, Figure 5aAs shown, all line segment type tracking segments are converted to the four quadrants in the model coordinate system according to the four line segment directions. In the figure, marks ①②③④ are four classifications of line segments combined with the shape attribute characteristics of winCC, representing the oblique line segments from the first to the fourth quadrants respectively. Special line segments can be represented by the x-axis and y-axis; among them, (X0, Y0) represents the reference coordinates, the length of the ab segment in the model coordinate system is the model length of the corresponding tracking segment, H and W represent the fixed constants of the ab segment (that is, the line segment type tracking segment), which are related to the length and angle of the ab segment, k represents the entry ratio (percentage) of the weld tracking point into the current ab segment, and X and Y represent the HMI coordinates of the weld tracking point (that is, the screen position). Among them, for the first type of oblique line segment, the weld tracking function is: X=X0+WK, Y=Y0+H (1-K); for the second type of oblique line segment, the weld tracking function is: X=X0+WK, Y=Y0+HK; for the third type of oblique line segment, the weld tracking function is: X=X0+W (1-K), Y=Y0+HK; for the fourth type of oblique line segment, the weld tracking function is: X=X0+W (1-K), Y=Y0+H (1-K).

[0038] like Figure 5b As shown, the clockwise rotating arc-shaped tracking segment is converted to the model coordinate system. In the figure, marks ①②③④ are four classifications of arcs combined with the shape attribute characteristics of winCC, representing the clockwise arcs of the first to fourth quadrants respectively; among them, (X0, Y0) represents the reference coordinates, r represents the arc radius, k represents the percentage of the weld tracking point entering the current ab segment, the length of the ab segment is the model length of the corresponding tracking segment, and X and Y represent the HMI coordinates of the weld tracking point (i.e., the screen position). Among them, for the arc-shaped tracking segment of the first category, its weld tracking function is: X=X0+r·(1+cos(pi·k)), Y=Y0+r·sin(pi·k). For the arc-shaped tracking segment of the second category, its weld tracking function is: X=X0+r·(1-sin(pi·k)), Y=Y0+r·(1+cos(pi·k)). For the arc-shaped tracking section of the third category, the weld tracking function is: X=X0+r·(1-cos(pi·k)), Y=Y0+r·(1+sin(pi·k)). For the arc-shaped tracking section of the fourth category, the weld tracking function is: X=X0+r·sin(pi·k), Y=Y0+r·(1-cos(pi·k)). Where pi represents π.

[0039] like Figure 5cAs shown, the counterclockwise arc-shaped tracking segment is converted to the model coordinate system. In the figure, marks ①②③④ are four classifications of arcs combined with the shape attribute characteristics of winCC, representing the counterclockwise arcs in the first to fourth quadrants respectively; among them, (X0, Y0) represents the reference coordinates, r represents the arc radius, k represents the percentage of the weld tracking point entering the current ab segment, the length of the ab segment is the model length of the corresponding tracking segment, and X and Y represent the HMI coordinates of the weld tracking point (i.e., the screen position). For the arc-shaped tracking segment of the first category, its weld tracking function is: X=X0+r·(1+cos(pi·k)), Y=Y0+r·(1-sin(pi·k)). For the arc-shaped tracking segment of the second category, its weld tracking function is: X=X0+r·sin(pi·k), Y=Y0+r·(1+cos(pi·k)). For the arc-shaped tracking section of the third category, the weld tracking function is: X=X0+r·(1-cos(pi·k)), Y=Y0+r·sin(pi·k). For the arc-shaped tracking section of the fourth category, the weld tracking function is: X=X0+r·(1-sin(pi·k)), Y=Y0+r·(1-cos(pi·k)). Where pi represents π.

[0040] Specifically, according to the model data of each tracking section, the weld tracking function corresponding to each tracking section is confirmed by direction and angle, and then the coordinate conversion model corresponding to each tracking section can be obtained by assignment, which is used to provide data for coordinate conversion of the actual position of the weld, so as to facilitate the controller to perform coordinate tracking calculations on the weld tracking points. In addition, after the weld is generated, the moving distance of the weld can be calculated accurately to millimeters, and the proportion of the weld entering the current line segment or arc is calculated according to the moving distance of the weld tracking point, so as to perform coordinate conversion according to the reference element on the model coordinate system. Since the actual data is much larger than the pixel unit on the HMI screen model, the movement continuity of the weld on the HMI screen model can reach its pixel unit, so that smooth and accurate tracking can be achieved.

[0041] In some embodiments, the ratio of the actual length of each tracking section on the continuous processing line to the model length in the line screen model is the display ratio; the display ratios of the various tracking sections are set to be the same or different.

[0042] Specifically, due to the display size limitation of the HMI screen in the winCC software interface on the host computer, some longer line segments are inconvenient to display too long or need to be enlarged for display, so the line segments corresponding to some tracking segments have a smaller display ratio, and the line segments corresponding to some tracking segments have a larger display ratio. The arcs corresponding to some tracking segments have a smaller display ratio, and the arcs corresponding to some tracking segments have a larger display ratio. In this way, by setting the display ratio between the actual length and the model length of each tracking segment to be different or the same, the HMI screen drawing is made freer, and there is no need to uniformly match the ratio of the actual length and the model length too much. The arcs or line segments corresponding to each tracking segment can be matched according to different ratios.

[0043] In some embodiments, before the controller obtains the entry length of the weld of the current strip on the continuous processing production line in step S102, it also includes: the host computer obtains the actual amount of loop set for the loop on the continuous processing production line, and updates the start and end positions and model length of the tracking section corresponding to the loop area in the production line screen model.

[0044] Specifically, some continuous processing production lines are equipped with inlet loops and outlet loops. When the continuous processing production line is officially used to complete the current strip processing process, the loop amount may be adjusted according to process requirements. The loop amount can be adjusted between 0 and 100%. The preset loop amount for the loop on the production line screen model is 100%. After adjusting the loop amount on the continuous processing production line according to process requirements, it is necessary to dynamically adjust the loop amount on the production line screen model, and dynamically calculate the start and end positions and model length of the tracking section corresponding to the loop area in the production line screen model.

[0045] It should be noted that due to the different types of looper vehicles, the start and end position adjustment methods of the tracking section corresponding to the looper area are different. Specifically, for horizontal loopers, the length of each layer of strip steel is: Y=aX+b, where X represents the loop amount, Y represents the length of each layer of strip steel, b is the fixed length of the loop when the loop amount of each layer of strip steel is 0%, and a is the corresponding loop length when the loop amount of each layer of strip steel is 100%. Each layer of strip steel has different coefficients a and b. For vertical loopers: The length of each layer of strip steel is: Y= , where X represents the looping amount, Y represents the length of each layer of strip steel on the looping, b is the distance between the adjacent upper and lower rollers, a is the looping length corresponding to 100% of the looping amount of each layer of strip steel, and the coefficients a and b of each layer of strip steel are the same. In this way, the upper computer determines the length of each layer of strip steel according to the looping amount and the type of looping car, that is, determines the model length of each layer of tracking section, and adjusts the model length of the tracking section corresponding to the looping area in the production line screen model, that is, adjusts the start and end positions of the tracking section corresponding to the looping area, so that the geometric data and model data of the entire continuous tracking section can be dynamically updated to improve the weld tracking accuracy of the strip steel.

[0046] Considering that in the related art, when tracking multiple welds simultaneously, the workload of programming and screen editing is large, which is not conducive to the expansion of related functions such as material tracking. The weld tracking method of this embodiment also includes: the controller obtains the entry length of the new weld on the current strip steel on the continuous processing production line, and the controller simultaneously tracks and calculates the multiple welds, so that the host computer simultaneously displays the screen positions of the multiple welds on the production line screen model.

[0047] Specifically, if there are multiple welds continuously welded on a strip of steel, N equal data blocks can be established to achieve simultaneous tracking of N welds. Specific additions can be made according to process requirements. In this way, a corresponding number of weld tracking points can be added to the production line screen model. Theoretically, the number can be increased infinitely, which is simple and convenient.

[0048] The weld tracking method of this embodiment has been fully functionally tested on multiple projects. The test results show that the weld tracking is smooth and accurate, which has been well received by production units and meets the design requirements.

[0049] In a specific embodiment, a production unit has four continuous units for strip processing. Due to the characteristics of the process, the welds need to be tracked along the entire line. Before the weld tracking function was available, each time welding was completed, the operator was required to follow the welds in real time and perform linkage operations and protective observations on related equipment. After the weld tracking function of this embodiment is added, the operator can notify relevant personnel in advance based on the real-time position of the weld on the HMI screen model and the camera monitoring screen at the corresponding position. While reducing the number of on-site operators, the work pressure and intensity of regional personnel are greatly reduced. The linkage of some key equipment can also automatically complete related operations.

[0050] In summary, in this embodiment, the programming language of the controller is used, and the coordinates of the strip weld tracking points are accurately calculated by using multi-layer data nesting and loop calculation stacking. By classifying, segmenting, and simplifying the simulated production line in the production line screen model according to line segments and arcs, and in principle, the display ratio between the model length of each tracking section on the HMI screen model and the actual length of each tracking section on the continuous processing production line can be set differently, so that the detailed position of the weld can be accurately reflected and calculated without adjusting the ratio of each unit equipment in the original HMI screen model, which makes it easier to add weld tracking functions to old units, making the program more applicable and practical, and at the same time, it is easy to track production conditions and respond in a timely and effective manner to better avoid unknown risks and reduce the loss of downtime caused by human or unknown factors. At the same time, it provides technical preparation for material tracking, on this basis, it can quickly, conveniently and accurately expand the material tracking function.

[0051] See also Figure 6 Based on the same inventive concept, an embodiment of the present application provides a weld tracking system on a strip steel continuous processing production line, and the weld tracking system on a strip steel continuous processing production line corresponds to a weld tracking method on a strip steel continuous processing production line in the above embodiment. The weld tracking system includes a host computer 601 and a controller 602.

[0052] The host computer 601 is used to divide and simplify the simulated production line on the production line screen model, obtain the geometric model data of different tracking sections, establish the coordinate transformation model of each tracking section and send it to the controller 602. The controller 602 is used to obtain the entry length of the weld of the current strip on the continuous processing production line, and determine the actual position of the weld in the target tracking section according to the actual length measured for each tracking section on the continuous processing production line. The controller 602 is also used to determine the screen position of the weld according to the actual position of the weld of the current strip in the target tracking section and the model data of the target tracking section, and display the screen position of the weld in real time on the production line screen model through the host computer 601.

[0053] In this embodiment, the main work involving coordinate tracking calculation in the weld tracking method is completed in the controller, which is convenient for function encapsulation and function protection to prevent program data leakage. In addition, the host computer only displays the production line screen model, reducing the programming work on the host computer side, thereby reducing data loading and improving data refresh efficiency.

[0054] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A weld tracking method on a strip steel continuous processing production line, characterized in that: Applied between the controller and the host computer of the weld tracking system, including: The host computer divides and preprocesses the simulated production line on the production line screen model, obtains model data of different tracking sections and sends them to the controller; The controller obtains the entry length of the weld of the current strip steel on the continuous processing production line, and determines the actual position of the weld in the target tracking section according to the actual length measured for each of the different tracking sections on the continuous processing production line; The controller determines the screen position of the weld according to the actual position of the weld of the current strip in the target tracking section and the model data of the target tracking section, and displays the screen position of the weld in real time on the production line screen model through the host computer.

2. The weld tracking method on a strip steel continuous processing production line according to claim 1 is characterized in that: The controller obtains the entry length of the weld of the current strip steel on the continuous processing production line, and determines the actual position of the weld in the target tracking section according to the actual length of each tracking section on the continuous processing production line, including: Determine the target tracking section where the weld is located according to the entry length of the weld of the current strip steel and the actual length of each tracking section; The entry ratio of the weld in the target tracking section is determined and used as the actual position of the weld in the target tracking section.

3. The weld tracking method on a strip steel continuous processing production line according to claim 1, characterized in that: The classifying and preprocessing the simulated production line on the production line screen model by the host computer includes: The simulated production line is divided according to the line type, and the incomplete semicircle is simplified to obtain a line segment type tracking section and an arc type tracking section; Acquire geometric data of each of the tracking sections, the geometric data including the starting point coordinates, the ending point coordinates, the model length, direction, angle and / or radius of the tracking section; The geometric data of each tracking section is transformed to obtain the model data of each tracking section, wherein the model data refers to the data used for coordinate transformation of the actual position of the weld.

4. The weld tracking method on a strip steel continuous processing production line according to claim 3 is characterized in that: When classifying the simulated production line on the production line screen model, it also includes: simplifying the tracking section of the incomplete semicircular arc.

5. The weld tracking method on a strip steel continuous processing production line according to claim 1, characterized in that: The controller determines the screen position of the weld according to the actual position of the weld of the current strip steel in the target tracking section and the model data of the target tracking section, including: Assigning the model data of the target tracking section to the weld tracking function corresponding to the target tracking section to obtain a coordinate transformation model corresponding to the target tracking section; The screen position of the weld is determined according to the actual position of the weld of the current steel strip in the target tracking section and the coordinate transformation model corresponding to the target tracking section.

6. The weld tracking method on a strip steel continuous processing production line according to any one of claims 1 to 5, characterized in that: Also includes: The controller encapsulates different weld tracking functions. For a line segment type tracking section, a linear weld tracking function is preset, and for an arc type tracking section, a trigonometric function form of weld tracking function is preset.

7. The weld tracking method on a strip steel continuous processing production line according to any one of claims 1 to 5, characterized in that: The ratio of the actual length of each tracking section on the continuous processing production line to the model length in the production line screen model is the display ratio; the display ratios of the various tracking sections are set to be the same or different.

8. The weld tracking method on a strip steel continuous processing production line according to any one of claims 1 to 5, characterized in that: Before the controller obtains the entry length of the weld of the current strip steel on the continuous processing production line, it also includes: the host computer obtains the actual loop quantity set for the loop on the continuous processing production line, and updates the start and end positions and model length of the tracking section corresponding to the loop area in the production line screen model.

9. The weld tracking method on a strip steel continuous processing production line according to any one of claims 1 to 5, characterized in that: Also includes: The controller obtains the entry length of the new weld on the current strip on the continuous processing production line, and the controller simultaneously tracks and calculates multiple welds so that the host computer simultaneously displays the screen positions of multiple welds on the production line screen model.

10. A weld tracking system on a strip steel continuous processing production line, characterized in that: include: Host computer and controller; The host computer is used to divide and preprocess the simulated production line on the production line screen model, obtain model data of different tracking sections and send them to the controller; The controller is used to obtain the entry length of the weld of the current strip steel on the continuous processing production line, and determine the actual position of the weld in the target tracking section according to the actual length measured for each tracking section on the continuous processing production line; The controller is also used to determine the screen position of the weld according to the actual position of the weld of the current strip steel in the target tracking section and the model data of the target tracking section, and to display the screen position of the weld in real time on the production line screen model through the host computer.

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