Zinc layer control method and device, medium and equipment

Abstract

The invention discloses a zinc layer control method and device, a medium and equipment, and is applied to a hot galvanizing unit. The method comprises the steps that whether the connecting position of a current steel coil and a next steel coil passes through an air knife or not is judged, and if yes, a first steel coil parameter of the current steel coil and a second steel coil parameter of the next steel coil are obtained; if the parameter variation of the second steel coil parameter relative to the first steel coil parameter is greater than a preset parameter variation, obtaining a second zinc layer thickness control parameter according to the second steel coil parameter based on a pre-established steel coil zinc layer thickness mapping relationship; and controlling the zinc layer thickness of the next steel coil according to the second zinc layer thickness control parameter. The stability of the thickness of the zinc layer can be ensured.

Description

Technical Field

[0001] The present application relates to the technical field of hot-dip galvanizing, and in particular, to a zinc layer control method, device, medium, and equipment. Background Art

[0002] The thickness of the zinc layer of the galvanized sheet is a key control indicator. On the one hand, it is related to the pass rate of the galvanized sheet, and on the other hand, it affects the production cost of the galvanized sheet.

[0003] At present, when controlling the thickness of the zinc layer, first, the air knife parameters are set based on experience, and secondly, the air knife parameters are corrected according to the measurement results of the zinc layer thickness gauge. However, on the one hand, the air knife parameters are set manually, which makes it difficult to ensure the production stability of the galvanized sheet and the zinc layer thickness is prone to fluctuations. On the other hand, the zinc layer thickness gauge uses cold thickness measurement to measure the zinc layer thickness and performs feedback control based on this, which results in a long lag and control delay. Summary of the Invention

[0004] The embodiments of the present application provide a zinc layer control method, device, medium, and equipment for solving the technical problem that the zinc layer thickness is prone to fluctuation when the air knife parameters are manually set.

[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by practice of the present application.

[0006] According to a first aspect of the present application, a zinc layer control method is provided, which is applied to a hot-dip galvanizing unit, and the method comprises:

[0007] Determine whether the connection position between the current steel coil and the next steel coil passes through the air knife, and if so, obtain the first steel coil parameter of the current steel coil and the second steel coil parameter of the next steel coil;

[0008] If a parameter change of the second steel coil parameter relative to the first steel coil parameter is greater than a preset parameter change, a second zinc layer thickness control parameter is obtained according to the second steel coil parameter based on a pre-established steel coil zinc layer thickness mapping relationship, wherein the steel coil zinc layer thickness mapping relationship includes: a plurality of steel coil parameters and a zinc layer thickness control parameter corresponding to each steel coil parameter, the steel coil parameters including steel coil thickness, steel coil running speed, steel type, zinc layer thickness, and air knife distance, and the zinc layer thickness control parameter includes air knife pressure and air knife height;

[0009] The zinc layer thickness of the next steel coil is controlled according to the second zinc layer thickness control parameter.

[0010] In some embodiments, based on the above solution, after determining whether the connection position between the current steel coil and the next steel coil passes through the air knife, the method further includes:

[0011] If not, obtaining a first steel coil parameter of the current steel coil, wherein the first steel coil parameter includes a first running speed;

[0012] If the change in the first operating speed is greater than a preset speed change, updating the first operating speed;

[0013] Based on a pre-established mapping relationship of the zinc layer thickness of the steel coil, obtaining a first zinc layer thickness control parameter according to the first steel coil parameter;

[0014] The zinc layer thickness of the current steel coil is controlled according to the first zinc layer thickness control parameter.

[0015] In some embodiments, based on the above solution, after obtaining the first steel coil parameter of the current steel coil, the method further includes:

[0016] If the change in the first operating speed is less than or greater than a preset speed change;

[0017] Obtaining a current zinc layer thickness control parameter of the current steel coil;

[0018] The zinc layer thickness of the current steel coil is controlled according to the current zinc layer thickness control parameter.

[0019] In some embodiments, based on the above solution, after obtaining the first steel coil parameter of the current steel coil and the second steel coil parameter of the next steel coil, the method further includes:

[0020] If the parameter change of the second steel coil parameter relative to the first steel coil parameter is less than or equal to the preset parameter change, obtaining the current zinc layer thickness control parameter of the current steel coil;

[0021] The zinc layer thickness of the next steel coil is controlled according to the current zinc layer thickness control parameter.

[0022] In some embodiments, based on the above solution, after determining whether the connection position between the current steel coil and the next steel coil passes through the air knife, the method further includes:

[0023] If not, obtain the first zinc layer shape parameter of the current steel coil, and determine whether the current steel coil has a wedge-shaped or convex curve feature based on the first zinc layer shape parameter. If so, obtain the first zinc layer shape control parameter based on the first zinc layer shape parameter based on a pre-established steel coil zinc layer shape mapping relationship. The steel coil zinc layer shape mapping relationship includes multiple zinc layer shape parameters and zinc layer shape control parameters corresponding to each zinc layer shape parameter. The zinc layer shape parameters include steel coil thickness, steel coil hardness, a straight line slope and a straight line determination coefficient obtained by linear fitting the zinc layer thickness from one side to the other in the width direction of the upper surface or the lower surface of the steel coil, and a quadratic term coefficient and a curve determination coefficient obtained by quadratic curve fitting. The zinc layer shape control parameters include an air knife movement distance and a distance between a correction roller and a centerline of the steel coil. The air knife movement distance includes a first movement distance and a second movement distance. The first movement distance is the distance between the air knife on the same side of the upper surface of the steel coil and both sides of the upper surface of the steel coil in the width direction. The second movement distance is the distance between the air knife on the same side of the lower surface of the steel coil and both sides of the lower surface of the steel coil in the width direction.

[0024] The zinc layer shape of the current steel coil is controlled according to the first zinc layer shape control parameter.

[0025] In some embodiments, based on the above solution, in determining whether the current steel coil has a wedge-shaped or convex curve feature according to the first zinc layer shape parameter, the method further includes:

[0026] If not, obtaining the current zinc layer shape control parameters of the current steel coil;

[0027] The zinc layer shape of the current steel coil is controlled according to the current zinc layer shape control parameter.

[0028] In some embodiments, based on the above solution, the first zinc layer shape parameters include a first straight line slope, a first straight line determination coefficient, a first quadratic term coefficient, and a first curve determination coefficient, and determining whether the current steel coil has a wedge-shaped or convex curve feature based on the first zinc layer shape parameters includes:

[0029] If the absolute value of the slope of the first straight line is greater than a first preset value and the determination coefficient of the first straight line is greater than a first preset coefficient, the current steel coil has a wedge shape;

[0030] If the absolute value of the first quadratic term coefficient is greater than a second preset value and the second curve determination coefficient is greater than a second preset coefficient, the current steel coil has a convex curve feature.

[0031] According to a second aspect of the present application, a zinc layer control device is provided, comprising:

[0032] a first judging unit, for judging whether a connection position between a current steel coil and a next steel coil passes through an air knife, and if so, obtaining a first steel coil parameter of the current steel coil and a second steel coil parameter of the next steel coil;

[0033] a first obtaining unit, wherein if a parameter change of the second steel coil parameter relative to the first steel coil parameter is greater than a preset parameter change, a second zinc layer thickness control parameter is obtained according to the second steel coil parameter based on a pre-established steel coil zinc layer thickness mapping relationship, wherein the steel coil zinc layer thickness mapping relationship includes: a plurality of steel coil parameters and a zinc layer thickness control parameter corresponding to each steel coil parameter, the steel coil parameters including steel coil thickness, steel coil running speed, steel type, zinc layer thickness, and air knife distance, and the zinc layer thickness control parameter includes air knife pressure and air knife height;

[0034] The first control unit controls the zinc layer thickness of the next steel coil according to the second zinc layer thickness control parameter.

[0035] According to a third aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored. The computer program includes executable instructions. When the executable instructions are executed by a processor, the method described in any embodiment of the first aspect of the present application is implemented.

[0036] According to the fourth aspect of the present application, an electronic device is provided, comprising: one or more processors; and a memory for storing executable instructions of the processors, wherein when the executable instructions are executed by the one or more processors, the one or more processors implement the method described in any embodiment of the first aspect of the present application.

[0037] The beneficial effects of this application are as follows:

[0038] If the connection position passes through the air knife, when the parameter change is greater than the preset parameter change, the zinc layer thickness control parameter of the next steel coil needs to be adjusted. The second zinc layer thickness control parameter is determined according to the mapping relationship between the zinc layer thickness of the steel coil and the parameters of the second steel coil. No manual setting is required, thus ensuring the stability of the zinc layer thickness.

[0039] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, explaining the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0041] Figure 1 A flow chart of a zinc layer control method according to an embodiment of the present application is shown;

[0042] Figure 2 shows a schematic diagram of a hot dip galvanizing unit;

[0043] Figure 3 A block diagram of a zinc layer control device in an embodiment of the present application is shown;

[0044] Figure 4 A schematic diagram showing a computer-readable storage medium in an embodiment of the present application is shown;

[0045] Figure 5 A schematic diagram showing the system structure of an electronic device in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0046] Figure 1 A flow chart of a zinc layer control method according to an embodiment of the present application is shown. Figure 1 , provides a zinc layer control method, which is applied to a hot dip galvanizing unit, and includes at least steps S1 to S3, which are described in detail as follows:

[0047] In step S1, it is determined whether the connection between the current coil and the next coil passes through an air knife. If so, the first coil parameter of the current coil and the second coil parameter of the next coil are obtained. The connection location can be the weld connecting the current coil and the next coil, or the connection between the tail of the current coil and the head of the next coil. By tracking the weld location, it can be determined whether the connection between the current coil and the next coil passes through an air knife. The current coil can be understood as a coil undergoing hot-dip galvanizing, and the next coil can be understood as a coil about to undergo hot-dip galvanizing. If the connection between the current coil and the next coil passes through an air knife, it can be understood that the next coil is about to undergo hot-dip galvanizing. If the connection between the current coil and the next coil does not pass through an air knife, it can be understood that the current coil is currently undergoing hot-dip galvanizing.

[0048] In step S2, if the parameter change of the second steel coil parameter relative to the first steel coil parameter is greater than the preset parameter change, based on the pre-established steel coil zinc layer thickness mapping relationship, the second zinc layer thickness control parameter is obtained according to the second steel coil parameter, and the steel coil zinc layer thickness mapping relationship includes: multiple steel coil parameters and zinc layer thickness control parameters corresponding to each steel coil parameter, the steel coil parameters include steel coil thickness, steel coil running speed, steel type, zinc layer thickness, and air knife distance, and the zinc layer thickness control parameters include air knife pressure and air knife height.

[0049] In some embodiments, the first steel coil parameters include first steel coil thickness, first steel coil running speed, first steel grade, first zinc layer thickness, and first air knife distance, and the second steel coil parameters include second steel coil thickness, second steel coil running speed, second steel grade, second zinc layer thickness, and second air knife distance. If the parameter change of the second steel coil parameter relative to the first steel coil parameter is greater than the preset parameter change, it includes: if the change of the second steel coil thickness relative to the first steel coil thickness is greater than the first preset thickness and / or the change of the second steel coil running speed relative to the first steel coil running speed is greater than the first preset running speed and / or the second steel grade is different from the first steel grade and / or the change of the second zinc layer thickness relative to the first zinc layer thickness is greater than the second preset thickness and / or the change of the second air knife distance relative to the first air knife distance is greater than the first preset distance, the parameter change of the second steel coil parameter relative to the first steel coil parameter is greater than the preset parameter change. The first preset thickness can be 0.1mm, and the second preset thickness can be 1g / m 2 , the first preset running speed can be 1m / min, and the first preset Julu Road can be 0.1mm.

[0050] In step S3, the zinc layer thickness of the next steel coil is controlled according to the second zinc layer thickness control parameter.

[0051] In this application, Figure 2 shows a schematic diagram of a hot dip galvanizing unit, Figure 2 In the figure, 1 is the zinc pot, 2 is the steel coil, 3 is the sinking roller, 4 is the balancing roller, 5 is the air knife, and 6 is the correction roller. Figure 2 The hot-dip galvanizing unit includes a zinc pot 1, which contains zinc liquid. The steel coil 2 enters the zinc liquid in the zinc pot 1, and the zinc liquid covers the upper and lower surfaces of the steel coil 2. Then the steel coil 2 passes around the sinking roller 3 and enters between the balance roller 4 and the correction roller 6 in the vertical direction, and then enters between two air knives 5. The air knives 5 blow off the excess zinc liquid on the upper and lower surfaces of the steel coil 2. Figure 2 There is excess zinc liquid on the left and right surfaces of the steel coil 2. The angle between the blowing direction of the air knife 5 and the horizontal direction is about 0°, such as -5° to 5°. The air knife distance is the distance between the air outlet of the air knife 5 and the surface of the strip on the same side, such as the distance between the left air knife and the left surface of the strip. The air knife height is the height of the air knife 5 relative to the liquid level of the zinc pot 1. The air knife pressure is the wind pressure at the air outlet of the air knife.

[0052] In some embodiments, the left air knife and the right air knife are in the same frame. By rotating the frame in a horizontal plane, the distance between the left air knife and the upper surface of the steel coil and the distance between the right air knife and the lower surface of the steel coil can be changed.

[0053] For example, see Figure 2, the upper surface of the steel coil is Figure 2 On the left side, the lower surface of the steel coil is Figure 2 On the right side, looking from top to bottom, if the frame is rotated clockwise, the distance between the front side of the left air knife and the front side of the upper surface of the steel coil increases, and the distance between the rear side and the rear side of the upper surface of the steel coil decreases. The distance between the front side of the right air knife and the front side of the lower surface of the steel coil decreases, and the distance between the rear side and the rear side of the lower surface of the steel coil increases.

[0054] In some embodiments, after determining whether the connection position between the current steel coil and the next steel coil passes through the air knife, the method further includes: if not, obtaining a first steel coil parameter of the current steel coil, the first steel coil parameter including a first operating speed; if a change in the first operating speed is greater than a preset speed change, updating the first operating speed; based on a pre-established steel coil zinc layer thickness mapping relationship, obtaining a first zinc layer thickness control parameter according to the first steel coil parameter; and controlling the zinc layer thickness of the current steel coil according to the first zinc layer thickness control parameter.

[0055] In some embodiments, before controlling the zinc layer thickness of the next steel coil according to the second zinc layer thickness control parameter, and after obtaining the second zinc layer thickness control parameter according to the second steel coil parameter, the method further includes: if any one of the second zinc layer thickness control parameters exceeds the upper limit value of the first preset parameter range, correcting the parameter to the upper limit value of the first preset parameter range; if any one of the second zinc layer thickness control parameters exceeds the lower limit value of the first preset parameter range, correcting the parameter to the lower limit value of the first preset parameter range.

[0056] In this way, the device for realizing the second zinc layer thickness control parameter is constrained to avoid exceeding the adjustment range of the device.

[0057] In some embodiments, the device that implements the second zinc layer thickness control parameter is a first target device, and controlling the zinc layer thickness of the next steel coil according to the second zinc layer thickness control parameter includes: switching the control parameter of the first target device from the first zinc layer thickness control parameter to the second zinc layer thickness control parameter to control the zinc layer thickness of the next steel coil. The first target device may be an air knife.

[0058] In some embodiments, switching the control parameter of the first target device from the first zinc layer thickness control parameter to the second zinc layer thickness control parameter includes: for any one of the second zinc layer thickness control parameters, if the change between the parameter and the parameter in the first zinc layer thickness control parameter is greater than the first preset change, when switching the parameter, the switching is completed after at least one transition.

[0059] Exemplarily, the first preset change amount is 5 mm, and the air knife height is switched from 20 mm to 30 mm, first switching the air knife height from 20 mm to 25 mm, and then switching to 30 mm.

[0060] In this way, process constraints are imposed on the first target device to prevent the first target device from switching too quickly and affecting production stability.

[0061] In some embodiments, after obtaining the first steel coil parameter of the current steel coil, the method further includes: if the change in the first operating speed is less than or greater than a preset speed change; obtaining a current zinc layer thickness control parameter of the current steel coil; and controlling the zinc layer thickness of the current steel coil according to the current zinc layer thickness control parameter.

[0062] In this way, during the hot-dip galvanizing process of the current steel coil, if the change in the running speed is large, that is, the steel coil is in a non-steady-state production state, it is necessary to redetermine the zinc layer thickness control parameters; if the change in the running speed is small, the steel coil is in a steady-state production state, and it is not necessary to redetermine the zinc layer thickness control parameters.

[0063] In some embodiments, the zinc coating thickness mapping relationship of the steel coil is determined by: establishing a neural network model; obtaining steel coil parameter data and zinc coating thickness control parameter data during the hot-dip galvanizing process; training the neural network model using the steel coil parameter data as input and the zinc coating thickness control parameter data as output to obtain a trained neural network model, and characterizing the zinc coating thickness mapping relationship of the steel coil by the mapping relationship between the input and output of the trained neural network model. The neural network model architecture can include a 4×500 linear fully connected layer, 11 block residual network layers, and a 500×2 linear fully connected layer, where each block includes a 500×500 linear fully connected layer and a sigmoid activation function, using the Mse loss function as the loss function, and an AdamW optimizer as the optimization function. The acquisition of the steel coil parameter data and zinc coating thickness control parameter data can be performed periodically, for example, every 500ms.

[0064] In some embodiments, obtaining the steel coil parameter data and the zinc layer thickness control parameter data includes: collecting data during the hot-dip galvanizing production process to obtain initial steel coil parameter data and initial zinc layer thickness control parameter data; and preprocessing the initial steel coil parameter data and the initial zinc layer thickness control parameter data to obtain the steel coil parameter data and the zinc layer thickness control parameter data. A process data collection module can be used to collect data during the hot-dip galvanizing production process.

[0065] In some embodiments, collecting data during the hot-dip galvanizing production process includes collecting data during the hot-dip galvanizing production process when process parameters are stable. Stable process parameters refer to stable coil speed, air knife pressure, air knife distance, air knife height, air knife angle, and correction roller position.

[0066] In some embodiments, the preprocessing of the initial steel coil parameter data and the initial zinc layer thickness control parameter data to obtain the steel coil parameter data and the zinc layer thickness control parameter data includes: performing vacancy processing, error data processing and filtering processing on the initial steel coil parameter data and the initial zinc layer thickness control parameter data to obtain the steel coil parameter data and the zinc layer thickness control parameter data.

[0067] In some embodiments, the initial steel coil parameter data includes multiple groups of first data, each group of the first data includes steel coil thickness data, steel coil running speed data, steel type data, zinc layer thickness data, and air knife distance data, and the initial zinc layer thickness control parameter data includes multiple groups of second data, each group of the second data includes air knife pressure data and air knife height data. The initial steel coil parameter data and the initial zinc layer thickness control parameter data are processed for vacancies in the following manner; if any one of the first data or the second data in each group is missing, determine whether the data is measurable data. If so, delete the first data or the second data in this group; if not, use a preset value to replace the data.

[0068] In some embodiments, the initial steel coil parameter data includes multiple groups of first data, each group of the first data includes steel coil thickness data, steel coil running speed data, steel type data, zinc layer thickness data, and air knife distance data, and the initial zinc layer thickness control parameter data includes multiple groups of second data, each group of the second data includes air knife pressure data and air knife height data. Error data processing is performed on the initial steel coil parameter data and the initial zinc layer thickness control parameter data in the following manner: if any one of the first data or the second data in each group exceeds the corresponding preset range, determine whether the data is greater than the upper limit value of the preset range. If so, use the upper limit value of the preset range to replace the data; if not, use the lower limit value of the preset range to replace the data.

[0069] In some embodiments, the initial steel coil parameter data includes multiple groups of first data, each group of the first data includes steel coil thickness data, steel coil running speed data, steel type data, zinc layer thickness data, and air knife distance data, and the initial zinc layer thickness control parameter data includes multiple groups of second data, each group of the second data includes air knife pressure data and air knife height data. The initial steel coil parameter data and the initial zinc layer thickness control parameter data are filtered in the following manner: for any one of the first data or the second data in each group, the values ​​other than the maximum and minimum values ​​of the data are averaged to obtain the target value of the data.

[0070] In some embodiments, after obtaining the first steel coil parameter of the current steel coil and the second steel coil parameter of the next steel coil, the method further includes: if the parameter change of the second steel coil parameter relative to the first steel coil parameter is less than or equal to a preset parameter change, obtaining a current zinc layer thickness control parameter of the current steel coil; and controlling the zinc layer thickness of the next steel coil according to the current zinc layer thickness control parameter.

[0071] In some embodiments, after determining whether the connection position between the current steel coil and the next steel coil passes through the air knife, the method further includes: if not, obtaining the first zinc layer shape parameter of the current steel coil, and determining whether the current steel coil has a wedge-shaped or convex curve feature based on the first zinc layer shape parameter; if so, based on a pre-established steel coil zinc layer shape mapping relationship, obtaining a first zinc layer shape control parameter based on the first zinc layer shape parameter, the steel coil zinc layer shape mapping relationship includes multiple zinc layer shape parameters and zinc layer shape control parameters corresponding to each zinc layer shape parameter, and the zinc layer shape parameters include steel coil thickness, steel coil hardness, and width on the upper surface or lower surface of the steel coil. The zinc layer shape control parameters include the air knife movement distance and the distance between the correction roller and the center line of the steel coil. The air knife movement distance includes a first movement distance and a second movement distance. The first movement distance is the distance between the air knife on the same side of the upper surface of the steel coil and the upper surface of the steel coil on both sides in the width direction. The second movement distance is the distance between the air knife on the same side of the lower surface of the steel coil and the lower surface of the steel coil on both sides in the width direction. The zinc layer shape of the current steel coil is controlled according to the first zinc layer shape control parameter.

[0072] It should be noted that, when the zinc layer shape parameters include the thickness of the steel coil, the hardness of the steel coil, the slope of the straight line and the straight line determination coefficient obtained by linear fitting of the zinc layer thickness in the width direction of the upper surface of the steel coil, and the quadratic term coefficient and the curve determination coefficient obtained by quadratic curve fitting, the air knife moving distance is the first moving distance; when the zinc layer shape parameters include the thickness of the steel coil, the hardness of the steel coil, the slope of the straight line and the straight line determination coefficient obtained by linear fitting of the zinc layer thickness in the width direction of the lower surface of the steel coil, and the quadratic term coefficient and the curve determination coefficient obtained by quadratic curve fitting, the air knife moving distance is the second moving distance.

[0073] For example, see Figure 2 The moving distance of the air knife is the distance that the front or rear side of the air knife moves to the left or right, and the distance between the correction roller and the center line of the steel coil is changed to be the distance that the correction roller moves to the left or right; the first moving distance is the distance that the air knife on the left moves to the left or right, and the second moving distance is the distance that the air knife on the right moves to the left or right.

[0074] In some embodiments, the first moving distance includes increasing or decreasing a first target distance, the first target distance being a first distance or a second distance, the second moving distance includes increasing or decreasing a second target distance, the second target distance being a third distance or a fourth distance, the first distance being the distance between one side of the air knife on the same side of the upper surface of the steel coil and one side of the width direction of the steel coil, the second distance being the distance between the other side of the air knife on the same side of the upper surface of the steel coil and the other side of the width direction of the steel coil, the third distance being the distance between one side of the air knife on the same side of the lower surface of the steel coil and one side of the width direction of the steel coil, and the fourth distance being the moving distance between one side of the air knife on the same side of the lower surface of the steel coil and the other side of the width direction of the steel coil. The one side of the width direction of the steel coil can be understood as the transmission side, and the other side of the width direction of the steel coil can be understood as the operation side.

[0075] For example, see Figure 2 , the first distance is the distance between the rear side of the air knife on the left and the rear side of the steel coil, the second distance is the distance between the front side of the air knife on the left and the front side of the steel coil, the third distance is the distance between the rear side of the air knife on the right and the rear side of the steel coil, and the fourth distance is the distance between the front side of the air knife on the right and the front side of the steel coil.

[0076] In some embodiments, the method further includes: when the slope of the straight line, the straight line determination coefficient, the quadratic term coefficient and the curve determination coefficient are the same, the thicker the steel coil thickness, the greater the distance between the correction roller and the center line of the steel coil is changed, and the greater the hardness of the steel coil, the greater the distance between the correction roller and the center line of the steel coil is changed; when the thickness of the steel coil and the hardness of the steel coil are the same, the greater the absolute value of the slope of the straight line, the greater the distance the air knife moves, the greater the absolute value of the quadratic term coefficient, and the greater the distance between the correction roller and the center line of the steel coil is changed.

[0077] In some embodiments, the steel coil zinc layer shape mapping relationship can be replaced by a steel coil wedge mapping relationship and a steel coil convexity mapping relationship, the steel coil wedge mapping relationship includes: multiple steel coil wedge influencing parameters and steel coil wedge control parameters corresponding to each steel coil wedge influencing parameter, the steel coil wedge influencing parameters include the slope of the straight line and the straight line determination coefficient obtained by linear fitting of the zinc layer thickness in the width direction of the steel coil, the steel coil wedge control parameters include the air knife movement distance, the steel coil convexity mapping relationship includes: multiple steel coil convexity influencing parameters and steel coil convexity control parameters corresponding to each steel coil convexity influencing parameter, the steel coil convexity influencing parameters include steel coil thickness, steel coil hardness, the quadratic term coefficient and the curve determination coefficient obtained by quadratic curve fitting of the zinc layer thickness in the width direction of the steel coil, and the steel coil convexity control parameters include changing the distance between the correction roller and the center line of the steel coil.

[0078] For example, see Figure 2 , Figure 2 The front side is the operating side, the rear side is the transmission side, and the zinc layer thickness in the width direction of the steel coil is linearly fitted from the operating side to the transmission side to obtain the straight line slope and straight line determination coefficient. The zinc layer thickness in the width direction of the steel coil is quadratic curve fitted from the operating side to the transmission side to obtain the quadratic term coefficient and curve determination coefficient.

[0079] In some embodiments, after determining whether the current steel coil has a wedge-shaped or convex curve feature based on the first zinc layer shape parameter, the method further includes: if not, obtaining a current zinc layer shape control parameter of the current steel coil; and controlling the zinc layer shape of the current steel coil based on the current zinc layer shape control parameter.

[0080] In some embodiments, the device that implements the first zinc layer shape control parameter is a second target device, and controlling the zinc layer shape of the current steel coil according to the first zinc layer shape control parameter includes: switching the control parameter of the second target device from the current zinc layer shape control parameter to the first zinc layer shape control parameter to control the zinc layer shape of the current steel coil. The second target device may be an air knife and a correction roller.

[0081] In some embodiments, after obtaining the first zinc layer shape control parameter based on the first zinc layer shape parameter, and before controlling the zinc layer shape of the current steel coil based on the first zinc layer shape control parameter, the method further includes: if any one of the first zinc layer shape control parameters exceeds the upper limit value of the second preset parameter range, correcting the parameter to the upper limit value of the second preset parameter range; if any one of the first zinc layer shape control parameters exceeds the lower limit value of the second preset parameter range, correcting the parameter to the lower limit value of the second preset parameter range.

[0082] In this way, the realization of the second target device is constrained to avoid exceeding the adjustment range of the second target device.

[0083] In some embodiments, the control parameters of the second target device are switched from the current zinc layer shape control parameters to the first zinc layer shape control parameters, including: for any one of the first zinc layer shape control parameters, if the change between the parameter and the parameter in the current zinc layer shape control parameters is greater than a second preset change, when switching the parameter, the switching is completed after at least one transition.

[0084] Exemplarily, the second preset change amount is 2 mm, and the air knife distance is switched from 20 mm to 23 mm, and the air knife height is first switched from 20 mm to 22 mm, and then to 23 mm.

[0085] In this way, process constraints are imposed on the second target device to prevent the second target device from switching too quickly and affecting production stability.

[0086] In some embodiments, after controlling the zinc layer shape of the current steel coil according to the first zinc layer shape control parameter, the method further includes: obtaining a fifth distance between the air knife and the connection position; if the fifth distance is less than or equal to a second preset distance, maintaining the zinc layer shape control parameter of the current steel coil at the first zinc layer shape control parameter unchanged, and the second preset distance is the distance between the air knife and the thickness measuring device in the running direction of the current steel coil; if the fifth distance is greater than the second preset distance, obtaining a second zinc layer shape parameter of the current position of the current steel coil, and the current position is the position of the current steel coil facing the air knife; updating the first zinc layer shape parameter to the second zinc layer shape parameter, and executing the step of obtaining the first zinc layer shape control parameter according to the first zinc layer shape parameter based on the pre-established steel coil zinc layer shape mapping relationship.

[0087] In some embodiments, the first zinc layer shape parameter includes a first straight line slope, a first straight line determination coefficient, a first quadratic term coefficient, and a first curve determination coefficient. The determining whether the current steel coil has a wedge-shaped or convex curve feature based on the first zinc layer shape parameter includes: if the absolute value of the first straight line slope is greater than a first preset value and the first straight line determination coefficient is greater than the first preset coefficient, the current steel coil has a wedge shape; if the absolute value of the first quadratic term coefficient is greater than a second preset value and the second curve determination coefficient is greater than the second preset coefficient, the current steel coil has a convex curve feature.

[0088] In some embodiments, when the first straight line slope, the first straight line determination coefficient, the first quadratic term coefficient and the second curve determination coefficient are the straight line slope and straight line determination coefficient obtained by linearly fitting the zinc layer thickness from one side to the other side in the width direction of the upper surface of the steel coil, and the quadratic term coefficient and curve determination coefficient obtained by quadratic curve fitting, the method further includes: if the first straight line slope is greater than the first preset value, it indicates that the other side of the current upper surface of the steel coil is higher than one side, and the first moving distance is to increase the first distance or decrease the second distance; if the first straight line slope is less than the opposite of the first preset value, it indicates that the current The other side of the upper surface of the steel coil is lower than one side, and the first moving distance is to reduce the first distance or increase the second distance; if the first quadratic term coefficient is greater than the second preset value and the second curve determination coefficient is greater than the second preset coefficient, it indicates that the current steel coil bulges from the lower surface to the upper surface, and the distance between the correction roller and the center line of the steel coil is changed to reduce the distance between the correction roller and the center line of the current steel coil; if the first quadratic term coefficient is less than the inverse of the second preset value and the second curve determination coefficient is greater than the second preset coefficient, it indicates that the current steel coil bulges from the upper surface to the lower surface, and the distance between the correction roller and the center line of the steel coil is changed to increase the distance between the correction roller and the center line of the current steel coil.

[0089] For example, see Figure 2 , the upper surface of the current steel coil is Figure 2 The left end face of the current coil is Figure 2 The front side of Figure 2If the slope of the first straight line is greater than the first preset value, it indicates that the rear side of the left end surface of the current steel coil is higher than the front side, and the distance between the front side of the air knife on the left and the front side of the left end surface of the current steel coil is increased, that is, the first distance, or the distance between the rear side of the air knife on the left and the rear side of the left end surface of the current steel coil is reduced, that is, the second distance; if the slope of the first straight line is less than the opposite of the first preset value, it indicates that the rear side of the left end surface of the current steel coil is lower than the front side, and the distance between the front side of the air knife on the left and the front side of the left end surface of the current steel coil is reduced, that is, the first distance, or the distance between the rear side of the air knife on the left and the rear side of the left end surface of the current steel coil is increased, that is, the second distance. two distances; if the first quadratic term coefficient is greater than the second preset value and the second curve determination coefficient is greater than the second preset coefficient, it indicates that the current steel coil bulges from the right end surface to the left end surface, and the distance between the correction roller and the center line of the steel coil is changed to reduce the distance between the correction roller and the center line of the current steel coil, that is, the correction roller is moved to the right; if the first quadratic term coefficient is less than the opposite of the second preset value and the second curve determination coefficient is greater than the second preset coefficient, it indicates that the current steel coil bulges from the left end surface to the right end surface, and the distance between the correction roller and the center line of the steel coil is changed to increase the distance between the correction roller and the center line of the current steel coil, that is, the correction roller is moved to the left.

[0090] It should be noted that, in this application, steel coil can also be understood as strip steel.

[0091] In the present application, on the one hand, unmanned zinc layer thickness control is achieved under both steady-state production and non-steady-state production conditions, the automation and digitization level of zinc layer thickness control is improved, and the stability of steel coil quality control and the overall stability of the production process are ensured; on the one hand, the problem of long lag and control delay in zinc layer thickness control is solved, and the zinc layer thickness control is transformed from post-control to in-process control, so that the zinc layer thickness of the steel coil is in a controllable state for a long time; on the one hand, the uniformity of the zinc layer thickness distribution in the width direction of the steel coil is improved, and the influence of the wedge shape and convexity of the zinc layer on the quality of hot-dip galvanizing is reduced; on the other hand, the accuracy of zinc layer thickness control is significantly improved, and the ability to optimize thickness control is possessed, which reduces the use of zinc ingots and reduces the production cost of hot-dip galvanizing.

[0092] Figure 3 A block diagram of a zinc layer control device in an embodiment of the present application is shown, see Figure 3 According to a second aspect of the present application, a zinc layer control device 100 is provided, which is applied to a hot-dip galvanizing unit, and the device comprises:

[0093] The first judgment unit 101 judges whether the connection position between the current steel coil and the next steel coil passes through the air knife, and if so, obtains the first steel coil parameter of the current steel coil and the second steel coil parameter of the next steel coil;

[0094] A first obtaining unit 102 obtains a second zinc layer thickness control parameter according to the second steel coil parameter based on a pre-established steel coil zinc layer thickness mapping relationship if a parameter change of the second steel coil parameter relative to the first steel coil parameter is greater than a preset parameter change, wherein the steel coil zinc layer thickness mapping relationship includes: a plurality of steel coil parameters and a zinc layer thickness control parameter corresponding to each steel coil parameter, the steel coil parameters including steel coil thickness, steel coil running speed, steel type, zinc layer thickness, and air knife distance, and the zinc layer thickness control parameter includes air knife pressure and air knife height;

[0095] The first control unit 103 controls the zinc layer thickness of the next steel coil according to the second zinc layer thickness control parameter.

[0096] Based on the same inventive concept, as a third aspect, the present application also provides a computer-readable storage medium on which a computer program is stored. The computer program includes executable instructions. When the executable instructions are executed by a processor, the method described in any embodiment of the first aspect of the present application is implemented.

[0097] In some possible implementations, various aspects of the present application may also be implemented in the form of a program product, which includes program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps of various exemplary implementations of the present application described in the above "Exemplary Method" section of this specification.

[0098] refer to Figure 4 As shown, a program product 200 for implementing the above method according to an embodiment of the present application is described. The program product 200 may be a portable compact disc read-only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present application is not limited thereto. In this document, a readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0099] The program product may be implemented in any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0100] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0101] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0102] The program code for performing the operations of the present application can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0103] As another aspect, the present application also provides an electronic device capable of implementing the above method.

[0104] Those skilled in the art will appreciate that various aspects of the present application can be implemented as systems, methods, or program products. Therefore, various aspects of the present application can be specifically implemented in the following forms: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or an implementation that combines hardware and software aspects, which may be collectively referred to herein as a "circuit," "module," or "system."

[0105] Refer to the following Figure 5 hereinafter, an electronic device 300 according to this embodiment of the present application is described. Figure 5 The electronic device 300 shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0106] like Figure 5As shown, electronic device 300 is implemented as a general-purpose computing device. Components of electronic device 300 may include, but are not limited to, the aforementioned at least one processing unit 310, the aforementioned at least one storage unit 320, and a bus 330 connecting various system components (including storage unit 320 and processing unit 310).

[0107] The storage unit stores program code, which can be executed by the processing unit 310, so that the processing unit 310 performs the steps described in the above "Example Method" section of this specification according to various exemplary embodiments of the present application.

[0108] The storage unit 320 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 321 and / or a cache memory unit 322 , and may further include a read-only memory unit (ROM) 323 .

[0109] The storage unit 320 may also include a program / utility 324 having a set (at least one) of program modules 325, such program modules 325 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0110] Bus 330 may represent one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0111] The electronic device 300 may also communicate with one or more external devices 400 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), one or more devices that enable a user to interact with the electronic device 300, and / or any device that enables the electronic device 300 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed through an input / output (I / O) interface 350. Furthermore, the electronic device 300 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 360. Figure 5 As shown, the network adapter 360 communicates with other modules of the electronic device 300 via the bus 330. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 300, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0112] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of this application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwiring, or a combination of any of these. Furthermore, the functional units may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0113] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of the claims of the present application.

Claims

1. A zinc layer control method, characterized in that, Applied to a hot-dip galvanizing unit, the method comprises: Determine whether the connection position between the current steel coil and the next steel coil passes through the air knife, and if so, obtain the first steel coil parameter of the current steel coil and the second steel coil parameter of the next steel coil; If a parameter change of the second steel coil parameter relative to the first steel coil parameter is greater than a preset parameter change, a second zinc layer thickness control parameter is obtained according to the second steel coil parameter based on a pre-established steel coil zinc layer thickness mapping relationship, wherein the steel coil zinc layer thickness mapping relationship includes: a plurality of steel coil parameters and a zinc layer thickness control parameter corresponding to each steel coil parameter, the steel coil parameters including steel coil thickness, steel coil running speed, steel type, zinc layer thickness, and air knife distance, and the zinc layer thickness control parameter includes air knife pressure and air knife height; The zinc layer thickness of the next steel coil is controlled according to the second zinc layer thickness control parameter.

2. A zinc layer control method according to claim 1, characterized in that, After determining whether the connection position between the current steel coil and the next steel coil passes through the air knife, the method further includes: If not, obtaining a first steel coil parameter of the current steel coil, wherein the first steel coil parameter includes a first running speed; If the change in the first operating speed is greater than a preset speed change, updating the first operating speed; Based on a pre-established mapping relationship of the zinc layer thickness of the steel coil, obtaining a first zinc layer thickness control parameter according to the first steel coil parameter; The zinc layer thickness of the current steel coil is controlled according to the first zinc layer thickness control parameter.

3. A zinc layer control method according to claim 2, characterized in that, After obtaining the first steel coil parameter of the current steel coil, the method further includes: If the change in the first operating speed is less than or greater than a preset speed change; Obtaining a current zinc layer thickness control parameter of the current steel coil; The zinc layer thickness of the current steel coil is controlled according to the current zinc layer thickness control parameter.

4. A zinc layer control method according to claim 1, characterized in that, After obtaining the first steel coil parameter of the current steel coil and the second steel coil parameter of the next steel coil, the method further includes: If the parameter change of the second steel coil parameter relative to the first steel coil parameter is less than or equal to the preset parameter change, obtaining the current zinc layer thickness control parameter of the current steel coil; The zinc layer thickness of the next steel coil is controlled according to the current zinc layer thickness control parameter.

5. A zinc layer control method according to claim 1, characterized in that, After determining whether the connection position between the current steel coil and the next steel coil passes through the air knife, the method further includes: If not, obtain the first zinc layer shape parameter of the current steel coil, and determine whether the current steel coil has a wedge-shaped or convex curve feature based on the first zinc layer shape parameter. If so, obtain the first zinc layer shape control parameter based on the first zinc layer shape parameter based on a pre-established steel coil zinc layer shape mapping relationship. The steel coil zinc layer shape mapping relationship includes multiple zinc layer shape parameters and zinc layer shape control parameters corresponding to each zinc layer shape parameter. The zinc layer shape parameters include steel coil thickness, steel coil hardness, a straight line slope and a straight line determination coefficient obtained by linear fitting the zinc layer thickness from one side to the other in the width direction of the upper surface or the lower surface of the steel coil, and a quadratic term coefficient and a curve determination coefficient obtained by quadratic curve fitting. The zinc layer shape control parameters include an air knife movement distance and a distance between a correction roller and a centerline of the steel coil. The air knife movement distance includes a first movement distance and a second movement distance. The first movement distance is the distance between the air knife on the same side of the upper surface of the steel coil and both sides of the upper surface of the steel coil in the width direction. The second movement distance is the distance between the air knife on the same side of the lower surface of the steel coil and both sides of the lower surface of the steel coil in the width direction. The zinc layer shape of the current steel coil is controlled according to the first zinc layer shape control parameter.

6. A zinc layer control method according to claim 5, characterized in that, In determining whether the current steel coil has a wedge-shaped or convex curve feature according to the first zinc layer shape parameter, the method further includes: If not, obtaining the current zinc layer shape control parameters of the current steel coil; The zinc layer shape of the current steel coil is controlled according to the current zinc layer shape control parameter.

7. A zinc layer control method according to claim 5, characterized in that: The first zinc layer shape parameters include a first straight line slope, a first straight line determination coefficient, a first quadratic term coefficient, and a first curve determination coefficient. The determining whether the current steel coil has a wedge-shaped or convex curve feature based on the first zinc layer shape parameters includes: If the absolute value of the slope of the first straight line is greater than a first preset value and the determination coefficient of the first straight line is greater than a first preset coefficient, the current steel coil has a wedge shape; If the absolute value of the first quadratic term coefficient is greater than a second preset value and the second curve determination coefficient is greater than a second preset coefficient, the current steel coil has a convex curve feature.

8. A zinc layer control device, characterized in that: Applicable to hot-dip galvanizing units, the device comprises: a first judging unit, for judging whether a connection position between a current steel coil and a next steel coil passes through an air knife, and if so, obtaining a first steel coil parameter of the current steel coil and a second steel coil parameter of the next steel coil; a first obtaining unit, wherein if a parameter change of the second steel coil parameter relative to the first steel coil parameter is greater than a preset parameter change, a second zinc layer thickness control parameter is obtained according to the second steel coil parameter based on a pre-established steel coil zinc layer thickness mapping relationship, wherein the steel coil zinc layer thickness mapping relationship includes: a plurality of steel coil parameters and a zinc layer thickness control parameter corresponding to each steel coil parameter, the steel coil parameters including steel coil thickness, steel coil running speed, steel type, zinc layer thickness, and air knife distance, and the zinc layer thickness control parameter includes air knife pressure and air knife height; The first control unit controls the zinc layer thickness of the next steel coil according to the second zinc layer thickness control parameter.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer program includes executable instructions, and when the executable instructions are executed by a processor, the method according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: include: one or more processors; A memory for storing executable instructions of the processor, wherein when the executable instructions are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 7.

Images