CN108796413B - Tracking display method for split points of production pictures of continuous galvanizing unit - Google Patents

Tracking display method for split points of production pictures of continuous galvanizing unit Download PDF

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Publication number
CN108796413B
CN108796413B CN201810623213.8A CN201810623213A CN108796413B CN 108796413 B CN108796413 B CN 108796413B CN 201810623213 A CN201810623213 A CN 201810623213A CN 108796413 B CN108796413 B CN 108796413B
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picture
strip steel
point
production
length
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CN108796413A (en
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王海
张国堂
林明涛
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Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
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Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06Zinc or cadmium or alloys based thereon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P23/00Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
    • B23P23/06Metal-working plant comprising a number of associated machines or apparatus
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36Elongated material
    • C23C2/40Plates; Strips

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Coating With Molten Metal (AREA)
  • General Factory Administration (AREA)

Abstract

The invention belongs to the technical field of plate coating, and particularly relates to a tracking display method of a production picture split point of a continuous galvanizing unit. The running condition and the position of the split points are displayed more intuitively after the split point tracking technology is provided for the HMI picture in the production process, the calculation is not needed after an accident occurs, particularly the repeated calculation is not needed under the condition that the production line is continuously decelerated, the system tracking system can be calibrated along with the production process speed, and the split point tracking display technology of the production picture is fast, convenient and accurate to use.

Description

Tracking display method for split points of production pictures of continuous galvanizing unit
Technical Field
The invention belongs to the technical field of plate coating, and particularly relates to a tracking display method for a production picture split point of a continuous galvanizing unit.
Background
In the daily production process, the defects of deviation of an annealing furnace, air knife blockage, air knife streak defect, slag sticking, chromatic aberration, roughness reduction, damage to a coating roller of a finishing machine and the like are caused, the quality of a product is directly influenced, the degradation of the product is caused, the time point of reaching a parting point needs to be calculated in the shortest time, the calculation of preparation time is needed, preparation is carried out for subsequent accident treatment, the time is always urgent, a large number of process parameters including annealing furnace cooling and production line speed reduction are regulated in a short time after an accident occurs, the air knife pressure is reduced, the adjustment of the finishing machine and the roller coater is further carried out, the work arrangement of personnel is also notified when necessary, the production plan is regulated, the time for the operation of the production process is not much, the reasonable arrangement is needed in the shortest time, the shutdown of the accident production line is caused due to the fact that a large quantity of degraded products are not timely arranged or calculation errors are caused, and the accident production line is stopped.
Disclosure of Invention
In order to overcome the defects, the invention provides a tracking display method of the parting points of a production picture of a continuous galvanizing unit, which can calculate the length of strip steel by utilizing the existing welding seam tracking technology and according to the weight, thickness and width of the strip steel, subtract the cutting quantity of the head and the tail of the strip steel according to the tonnage provided by an order requirement, calculate the parting length of the strip steel, continuously correct the parting points by utilizing the welding seam tracking arranged on a production line in the running process of the strip steel, reduce errors, display the parting points in an HMI picture by using different colors, and display the arrival length and time of the parting points at key equipment parts.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the tracking display method of the split cutting points of the production picture of the continuous galvanizing unit comprises the continuous galvanizing unit, wherein the continuous galvanizing unit comprises a weld seam tracking sensor, a production line speed setting and displaying device, steel coil information, DI split winding information, head and tail cutting loss of strip steel, a finishing machine and a zinc pot, the strip steel is polished and leveled by the finishing machine, and continuous galvanizing is carried out by the zinc pot;
the bottom of the finishing machine is provided with a finishing machine display length and time, and the rear side is provided with a first picture split point; the display length and time of the finishing machine comprise the residual length of the cutting point reaching the finishing machine and the residual time of the cutting point reaching the finishing machine;
the bottom of the zinc pot is provided with a zinc pot display length and time, and the rear side of the zinc pot is provided with a second picture split-cut point; the display length and time of the zinc pot comprise the residual length of the slitting point reaching the zinc pot and the residual time of the slitting point reaching the zinc pot.
The tracking display method comprises the following steps:
step 1: the method comprises the steps of transmitting an event which occurs to a tracking PLC in the form of a message by a welding seam tracking sensor, setting and displaying the production line speed, transmitting the event to a secondary control system for calculation after the processing of the tracking PLC, transmitting a calculation result to an HMI picture processing server for information processing, and defining the color of strip steel and the color of a parting point by the HMI picture processing server in combination with the parting information issued by PDI, distributing the color by a strip steel color display manager and outputting the color to a monitoring picture.
Step 2: the display motion track of the cutting points in the monitoring picture changes along with the change of the process speed of the production line, data are exchanged with the secondary control system through the continuous correction of the detection positions of the welding line detection points in the operation process, the data are recalculated and then transmitted back to the HMI picture processing server to correct the residual length of the strip steel cutting points reaching key keys, and the strip steel cutting points are refreshed and accurately displayed at the refresh speed less than or equal to 0.2 s/time.
Step 3: in order to reduce or prevent degradation products, the process speed is continuously reduced, the process is stopped when the production speed is met, the PLC is tracked to continuously exchange data with a secondary control system in the whole speed reduction process, and the display value of key equipment is updated.
Step 4: and calculating the length of the strip steel according to the weight, width and thickness information of the production raw materials and the volume invariance law M=ρ.v, subtracting the length of the head and tail of the inlet, calculating the length of the parting point of the strip steel, distributing a secondary control system for data transmission after welding by a welding machine, and transmitting the data to an HMI picture processing server of the whole line for display.
Step 5: the defect position is calculated more accurately by using the strip steel length displayed by the tracking display method of the dividing and cutting points of the production picture as a reference point after the defect occurs randomly on the production line, the residual time of the defect occurring by X meters is convenient to calculate and cut, the defect part can be cut off after the controllable defect is found in time, and the degradation quality is reduced.
The invention also has the following additional technical characteristics:
as an optimization, the process flow of continuous galvanization unit production is used as a monitoring picture of an HMI picture processing server of a production line, the running condition of the strip steel is prompted in the monitoring picture, the process flow is provided with two cutting points which are a first picture cutting point and a second picture cutting point, and the strip steel is cut into three rolls by the arrangement of the first picture cutting point and the second picture cutting point.
As an optimization, color information at the dividing and cutting points of the strip steel is respectively displayed in the monitoring picture of the HMI picture processing server, the strip steel is respectively expressed as an area a, an area B and an area C after being divided into three rolls, and the three different colors are respectively expressed, the color information is expressed in the picture of the HMI picture processing server in a remarkable color, along with the movement of the strip steel in the running direction, the specific areas or the equipment where the positions of the dividing and cutting points of the first picture and the second picture respectively arrive can be intuitively expressed in the picture of the HMI picture processing server, and the positioning can be quickly and accurately carried out after production or equipment accidents occur.
Optimally, the steel coil information is length x width x thickness and weight information of the steel coil.
Compared with the prior art, the invention has the advantages that:
(1) The HMI picture processing server provides the split point tracking technology in the production process, then the running condition and the position of the split point are displayed more intuitively, the calculation is not needed after the accident occurs, particularly the repeated calculation is not needed under the condition that the production line is continuously decelerated, the system tracking system can be calibrated along with the production process speed, and the tracking display method of the split point of the production picture is fast and convenient to use and accurate.
(2) The length of the strip steel displayed by the tracking display method of the dividing and cutting points of the production picture is used as a reference point after the defect occurs randomly on the production line, the defect position is calculated more accurately, the defect occurrence is X meters and the like, the defect can be calculated and cut conveniently, the defect part can be cut after the controllable defect is found in time, and the degradation quality is reduced.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a partial view of the position and time display of the finisher of the present invention;
FIG. 3 is a partial view of the zinc pot position and time display of the present invention;
FIG. 4 is a schematic view of the color and splitting points of the strip of the present invention;
fig. 5 is a schematic diagram of the method of the present invention.
Reference numerals illustrate: in the figure: 1. a first picture tangent point, a second picture tangent point, a zinc pot display length and time, a finishing machine, a zinc pot, a strip steel, and 8, the residual length of the finishing machine is reached by the cutting point, 9, the residual time of the finishing machine is reached by the cutting point, 10, the residual length of the zinc pot is reached by the cutting point, and 11, the residual time of the zinc pot is reached by the cutting point.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.
The tracking display method for the split cutting points of the production picture of the continuous galvanizing unit comprises the continuous galvanizing unit, wherein the continuous galvanizing unit comprises a weld seam tracking sensor, production line speed setting and displaying, steel coil information, DI split winding information, head and tail cutting loss of strip steel, a finishing machine 5 and a zinc pot 6, the strip steel 7 is polished and flattened through the finishing machine 5, and continuous galvanizing is carried out through the zinc pot 6.
The bottom of the finishing machine 5 is provided with a finishing machine display length and time 4, and the rear side is provided with a first picture tangent point 1; the display length and time 4 of the finishing machine comprise the remaining length 8 of the cutting point reaching the finishing machine and the remaining time 9 of the cutting point reaching the finishing machine.
The bottom of the zinc pot 6 is provided with a zinc pot display length and time 3, and the rear side is provided with a second picture split point 2; the zinc pot display length and time 3 comprises the residual length 10 from the cutting point to the zinc pot and the residual time 11 from the cutting point to the zinc pot.
The tracking display method comprises the following steps:
step 1: the method comprises the steps of transmitting an event which occurs to a tracking PLC in the form of a message by a welding seam tracking sensor, setting and displaying the production line speed, transmitting the event to a secondary control system for calculation after the processing of the tracking PLC, transmitting a calculation result to an HMI picture processing server for information processing, and defining the color of strip steel and the color of a parting point by the HMI picture processing server in combination with the parting information issued by PDI, distributing the color by a strip steel color display manager and outputting the color to a monitoring picture.
Wherein, the steel coil information is the length, width and thickness and weight information of the steel coil.
Step 2: the display motion track of the cutting points in the monitoring picture changes along with the change of the process speed of the production line, data are exchanged with the secondary control system through the continuous correction of the detection positions of the welding line detection points in the operation process, the data are recalculated and then transmitted back to the HMI picture processing server to correct the residual length of the strip steel cutting points reaching key keys, and the strip steel cutting points are refreshed and accurately displayed at the refresh speed less than or equal to 0.2 s/time.
Step 3: in order to reduce or prevent degradation products, the process speed is continuously reduced, the process is stopped when the production speed is met, the PLC is tracked to continuously exchange data with a secondary control system in the whole speed reduction process, and the display value of key equipment is updated.
Step 4: and calculating the length of the strip steel according to the weight, width and thickness information of the production raw materials and the volume invariance law M=ρ.v, subtracting the length of the head and tail of the inlet, calculating the length of the parting point of the strip steel, distributing a secondary control system for data transmission after welding by a welding machine, and transmitting the data to an HMI picture processing server of the whole line for display.
Step 5: the defect position is calculated more accurately by using the strip steel length displayed by the tracking display method of the dividing and cutting points of the production picture as a reference point after the defect occurs randomly on the production line, the residual time of the defect occurring by X meters is convenient to calculate and cut, the defect part can be cut off after the controllable defect is found in time, and the degradation quality is reduced.
Examples
The technical process of continuous galvanizing unit production is used as a monitoring picture of an HMI picture processing server of a production line, the running condition of the strip steel 7 is prompted in the monitoring picture, the technical process is provided with two cutting points which are a first picture cutting point 1 and a second picture cutting point 2, and the strip steel is cut into three rolls by the arrangement of the first picture cutting point 1 and the second picture cutting point 2.
Color information at the dividing and cutting points of the strip steel is respectively displayed in a monitoring picture of the HMI picture processing server, the strip steel is respectively expressed as an A area, a B area and a C area after being cut into three rolls, and the three different colors are respectively expressed, the color information is expressed in a picture of the HMI picture processing server, along with the movement of the strip steel in the running direction, the specific areas or equipment where the positions of the first picture dividing and cutting point 1 and the second picture dividing and cutting point 2 respectively arrive can be intuitively expressed in the picture of the HMI picture processing server, and the positioning can be quickly and accurately carried out after production or equipment accidents occur.
The operation description of the tracking display method of the split points of the production picture of the continuous galvanizing unit comprises the following steps:
fig. 1 is a process flow chart of the whole production line, wherein the process flow chart is used as a monitoring picture of an HMI picture processing server of the production line, the monitoring picture prompts the running condition of the strip steel 7, and in the drawing, a first picture split point 1 and a second picture split point 2 of two split points of the strip steel are respectively displayed in fig. 1 and 2, so that the strip steel is divided into three rolls. The residual length and residual time display 3 for displaying the strip steel tangent point is arranged below the picture of the zinc pot 6, and the residual length and residual time display 4 for displaying the strip steel tangent point is arranged below the picture of the finishing machine 5.
The two values are mainly shown in fig. 2, namely the remaining length 8 of the strip at the parting point of the finishing machine and the remaining time 9 of the parting point reaching the finishing machine.
In fig. 3, two values are mainly shown, namely the residual length 10 of the strip steel at the parting point of the zinc pot and the residual time 11 of the parting point reaching the zinc pot.
The color information of the steel parting point in the HMI picture processing server picture is mainly expressed in fig. 4, the A area, the B area and the C area respectively represent three colors, and the colors are mainly expressed in a remarkable color in the HMI picture processing server picture, and the positions of the parting points can be intuitively expressed to reach the area or the equipment along with the movement of the strip steel along with the running direction of the strip steel, so that operators can quickly and accurately position after production or equipment accidents occur, and a symbol can be used for replacing, such as a triangle, a circle or other shapes to be added to the positions of the parting points for tracking.
In fig. 5, the schematic diagram of the tracking display method of the split points of the production picture of the continuous galvanizing unit mainly comprises five parts of a weld joint tracking sensor, a production line speed setting and displaying, steel coil information (length×width×thickness, weight), DI split information, head and tail cutting loss of strip steel, wherein the weld joint tracking sensor, the production line speed setting and displaying and the steel coil information transmit the occurred events to a tracking PLC in the form of messages, the events are transmitted to a secondary control system for calculation after being processed by the tracking PLC, and the calculation results are transmitted to an HMI picture processing server for information processing, the HMI picture processing server is combined with split information issued by a PDI, and the colors of the strip steel and the colors of the split points are defined and are distributed by a strip steel color display manager and then are output to a monitoring picture.
The display motion track of the cutting points in the monitoring picture changes along with the change of the process speed of the production line, data are exchanged with the secondary control system through the continuous correction of the detection positions of the welding line detection points in the operation process, the data are recalculated and then transmitted back to the HMI picture processing server to correct the residual length of the strip steel cutting points reaching key keys, and the strip steel cutting points are refreshed and accurately displayed at the update speed of 0.2 s/time or less.
In order to reduce or prevent degradation products, the process speed is continuously reduced, the process is stopped when the production speed is met, the PLC is tracked to continuously exchange data with a secondary control system in the whole speed reduction process, and the display value of key equipment is updated.
And calculating the length of the strip steel according to the weight, width and thickness information of the production raw materials and the volume invariance law M=ρ.v, subtracting the length of the head and tail of the inlet, calculating the length of the parting point of the strip steel, distributing a secondary control system for data transmission after welding by a welding machine in normal times, and transmitting the secondary control system to an HMI picture processing server of the whole line for display.
The defect position is calculated more accurately by using the strip steel length displayed by the tracking display method of the dividing and cutting points of the production picture as a reference point after the defect occurs randomly on the production line, the residual time of the defect occurring by X meters and the like are convenient to calculate and cut, the defect part can be cut off after the controllable defect is found in time, and the degradation quality is reduced.
In the production process, the process section belongs to the core area of the whole galvanization unit, and the speed can not be greatly increased and reduced, otherwise, defective products and waste products can be generated.

Claims (4)

1. The tracking display method of the split cutting points of the production picture of the continuous galvanizing unit is characterized by comprising the continuous galvanizing unit, wherein the continuous galvanizing unit comprises a weld joint tracking sensor, a production line speed setting and displaying device, steel coil information, DI split winding information, head and tail cutting loss of strip steel, a finishing machine (5) and a zinc pot (6), and the strip steel (7) is polished and leveled by the finishing machine (5) and is continuously galvanized by the zinc pot (6);
the bottom of the finishing machine (5) is provided with a finishing machine display length and time (4), and the rear side is provided with a first picture split-cut point (1); the display length and time (4) of the finishing machine comprise the residual length (8) of the cutting point reaching the finishing machine and the residual time (9) of the cutting point reaching the finishing machine;
the bottom of the zinc pot (6) is provided with a zinc pot display length and time (3), and the rear side is provided with a second picture split-cut point (2); the zinc pot display length and time (3) comprise the residual length (10) from the slitting point to the zinc pot and the residual time (11) from the slitting point to the zinc pot;
the tracking display method comprises the following steps:
step 1: the method comprises the steps that a weld joint tracking sensor, a production line speed setting and displaying part and steel coil information are used for transmitting an occurred event to a tracking PLC in the form of a message, the event is transmitted to a secondary control system for calculation after being processed by the tracking PLC, a calculation result is sent to an HMI picture processing server for information processing, an HMI picture processing server is used for combining with the sub-coil information issued by a PDI, the color of strip steel and the color of a sub-contact point are defined, and the color is distributed by a strip steel color display manager and then is output to a monitoring picture;
step 2: the display motion track of the cutting points in the monitoring picture changes along with the change of the process speed of the production line, and the data is exchanged with the secondary control system through the continuous correction of the detection position of the welding seam detection point in the operation process, and the data is transmitted back to the HMI picture processing server after being recalculated to correct the residual length of the strip steel cutting points reaching key keys, and the strip steel cutting points are refreshed and accurately displayed at the refresh speed less than or equal to 0.2 s/time;
step 3: in order to reduce or prevent degradation products, the process speed is continuously reduced, the process is stopped when the production speed is met, the PLC is tracked to continuously exchange data to a secondary control system in the whole speed reduction process, and the display value of key equipment is updated;
step 4: calculating the length of the strip steel according to the weight, width and thickness information of the production raw materials and the volume invariance law M=ρ.v, subtracting the length of the head and tail of the inlet, calculating the length of the parting point of the strip steel, distributing a secondary control system for data transmission after welding by a welding machine, and transmitting the secondary control system to an HMI picture processing server of the whole line for display;
step 5: the defect position is calculated more accurately by using the strip steel length displayed by the tracking display method of the dividing and cutting points of the production picture as a reference point after the defect occurs randomly on the production line, the residual time of the defect occurring by X meters is convenient to calculate and cut, the defect part can be cut off after the controllable defect is found in time, and the degradation quality is reduced.
2. The tracking display method of the continuous galvanizing unit production picture tangent point according to claim 1, wherein the process flow of the continuous galvanizing unit production is used as a monitoring picture of an HMI picture processing server of a production line, the condition of the running of the strip steel (7) is prompted in the monitoring picture, the process flow is provided with two tangent points which are a first picture tangent point (1) and a second picture tangent point (2), and the arrangement of the first picture tangent point (1) and the second picture tangent point (2) is used for cutting the strip steel into three rolls.
3. The method for tracking and displaying the split points of the production pictures of the continuous galvanizing unit according to claim 1, wherein the monitoring pictures of the HMI picture processing server respectively display color information at the split points of the strip steel, the strip steel is respectively represented as an A area, a B area and a C area after being split into three rolls, and the three different colors are respectively represented, the three different colors are respectively represented in the pictures of the HMI picture processing server, the three different colors are represented in a remarkable color, and along with the movement of the strip steel in the running direction, the specific areas or equipment where the positions of the first picture split point (1) and the second picture split point (2) respectively reach can be intuitively expressed in the pictures of the HMI picture processing server, and the positioning can be quickly and accurately performed after the production or equipment accident occurs.
4. The method for tracking and displaying the split points of the production pictures of the continuous galvanizing unit according to claim 1, wherein the steel coil information is length, width, thickness and weight information of the steel coil.
CN201810623213.8A 2018-06-15 2018-06-15 Tracking display method for split points of production pictures of continuous galvanizing unit Active CN108796413B (en)

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