CN113083911B - Rolling process control method - Google Patents

Rolling process control method Download PDF

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Publication number
CN113083911B
CN113083911B CN202110350119.1A CN202110350119A CN113083911B CN 113083911 B CN113083911 B CN 113083911B CN 202110350119 A CN202110350119 A CN 202110350119A CN 113083911 B CN113083911 B CN 113083911B
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data
loop
preset
angle
angular velocity
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CN113083911A (en
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王海深
王娜
王秋娜
张转转
夏永彬
李春元
罗旭烨
王伦
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Beijing Shougang Co Ltd
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Beijing Shougang Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B21B37/50—Tension control; Compression control by looper control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters

Abstract

The invention discloses a rolling process control method, which is applied to a loop arranged between frames of a finishing mill group and comprises the following steps: acquiring actual angle data, angular velocity data and pressure data of the loop; if any one of the following conditions is detected, closed-loop control over the loop is triggered: the angle data is greater than the preset angle data, the angular velocity data is less than the preset angular velocity data, and the pressure data is greater than the preset pressure data; wherein the closed-loop control comprises strip steel tension control and loop angle control. The problem of in the correlation technique because of can't accurately judge loop and belted steel whether contact, make closed-loop control's cut-in time too early or postpone, lead to appearing choosing the cover phenomenon, even aggravate the steel condition of drawing.

Description

Rolling process control method
Technical Field
The invention relates to the technical field of strip steel rolling, in particular to a rolling process control method.
Background
The loop is used for storing a certain amount of strip steel, and ensures that the main machine of the rolling mill can continuously work when the flow of the front and rear frames per second is deviated in the process of processing the strip steel.
After the contact between the loop of the finishing mill group and the strip steel is judged, the loop control system is converted from an open-loop control stage to a closed-loop control stage, and if the loop control system judges that the contact time of the loop and the strip steel is earlier than the actual contact time, the adjustment direction of the loop control system is opposite, and the problems of loop picking and the like are caused; if the time when the loop control system judges that the contact between the loop and the strip steel is delayed compared with the actual time, the steel drawing condition is increased or the loop picking phenomenon occurs, so that the loop control system is very important for accurately and inerrably judging whether the loop of the hot finishing mill group is in contact with the strip steel or not.
Disclosure of Invention
The embodiment of the invention provides a rolling process control method, and solves the problem that in the related technology, because whether a loop is in contact with strip steel or not can not be accurately judged, the loop picking phenomenon is caused by the fact that the cut-in time of closed-loop control is too early or delayed, and even the steel drawing condition is aggravated.
In a first aspect, the present invention provides a rolling process control method according to an embodiment of the present invention, including: acquiring actual angle data, angular velocity data and pressure data of the loop; triggering closed-loop control of the loop if any one of the following conditions is detected: the angle data is larger than preset angle data, the angular velocity data is smaller than preset angular velocity data, and the pressure data is larger than preset pressure data; wherein the closed-loop control comprises strip steel tension control and loop angle control.
Preferably, the acquiring angular velocity data of the loop includes: acquiring the rotation angle of the loop in the last scanning period, the rotation angle of the loop in the current scanning period and the time of the scanning period; determining the angular velocity data based on the following formula:
Figure BDA0003001912180000021
wherein S is the angular velocity data, D 1 For the angle of rotation of the loop in the last scanning cycle, D 2 The rotating angle of the movable sleeve in the current scanning period is shown, and T is the time of the scanning period.
Preferably, the acquiring pressure data of the loop comprises: monitoring the actual pressure value of the loop; in the process of monitoring that the actual pressure value is greater than a preset pressure value, recording the duration of the actual pressure value which is greater than the preset pressure value, and judging whether the duration is greater than a preset duration or not; and if the duration is longer than the preset duration, representing that the pressure data is longer than the preset pressure data.
Preferably, in the method, the duration is in positive correlation with a pressure difference rate, and the pressure difference rate is a difference between the rated pressure value and the preset pressure value and is higher than the rated pressure value.
Preferably, the method further comprises: acquiring actual sleeve starting execution time of the loop; checking whether the angle data, the angular velocity data and the pressure data are failure data; if the angle data, the angular velocity data and the pressure data are failure data, judging whether the sleeve start execution time is greater than a preset sleeve start execution time; and when the sleeve starting execution time is greater than the preset sleeve starting execution time, triggering closed-loop control on the loop.
Preferably, the verifying whether the angle data, the angular velocity data, and the pressure data are failure data includes: when the angle data are detected to be larger than the preset angle data, checking whether the angle data exceed a preset angle range; when the angle data exceeds the preset angle range, judging that the angle data are failure data; when detecting that the angular velocity data is smaller than preset angular velocity data, checking whether the angular velocity data is larger than a preset threshold value; when the angular velocity data is larger than the preset threshold value, judging that the angular velocity data is failure data; when the pressure data is detected to be larger than the preset pressure data, checking whether the pressure value is within a preset error range; and when the pressure value exceeds the preset error range, judging that the pressure data is failure data.
Preferably, the method comprises: the step of acquiring angle, angular velocity data and pressure data of the loop is performed after the triggering of the closed-loop control of the loop.
In a second aspect, the present invention provides a rolling process control device according to an embodiment of the present invention, including: the data acquisition unit is used for acquiring actual angle data, actual angular velocity data and actual pressure data of the loop; the detection triggering unit is used for triggering the closed-loop control of the loop if any one of the following conditions is detected: the angle data is greater than preset angle data, the angular velocity data is less than preset angular velocity data, and the pressure data is greater than preset pressure data; wherein the closed-loop control comprises strip steel tension control and loop angle control.
In a third aspect, the present invention provides a rolling process control apparatus according to an embodiment of the present invention, including: a memory, a processor, and code stored on the memory and executable on the processor, the processor implementing the method of any of the embodiments of the first aspect when executing the code.
In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the method of any one of the embodiments in the first aspect.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
in the embodiment of the invention, the actual angle, the angular velocity data and the pressure data of the loop are firstly obtained; if it is detected: the angle is greater than the preset angle, the angular velocity data is less than the preset angular velocity data, the pressure data is greater than any one of the three conditions of the preset pressure data, whether the loop is in contact with the strip steel can be accurately judged through the combination of the three conditions, closed-loop control over the loop can be triggered once the contact is judged, the cut-in time of the closed-loop control can be accurately judged, closed-loop strip steel tension control and loop angle control can be accurately carried out, and then the accurate closed-loop control is achieved, so that the angle of the loop and the running speed of the strip steel can be adjusted.
In addition, in the closed-loop control stage, the steps of obtaining the angle, the angular velocity data and the pressure data of the loop can be continuously executed, and the loop is circulated, so that the tension of the strip steel among the frames is relatively stable, the phenomenon of loop picking is reduced, and the steel pulling condition is relieved.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flow chart of a rolling process control method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a structure of a looper in an embodiment of the present invention;
FIG. 3 is a schematic view of a rolling process control apparatus according to an embodiment of the present invention;
FIG. 4 is a functional block diagram of a rolling process control apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a computer-readable storage medium according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a rolling process control method, so as to solve the problem that in the related technology, because whether a loop is in contact with strip steel or not can not be accurately judged, the cut-in time of closed-loop control is too early or delayed, the phenomenon of loop picking occurs, and even the steel drawing condition is aggravated.
In order to solve the technical problems, the embodiment of the invention provides the following general ideas:
firstly, acquiring actual angle, angular velocity data and pressure data of a loop arranged between frames of a finishing mill group; if it is detected: the angle is greater than the preset angle, the angular velocity data is less than the preset angular velocity data, the pressure data is greater than any one of the three conditions of the preset pressure data, whether the loop is in contact with the strip steel can be accurately judged through the combination of the three conditions, closed-loop control over the loop can be triggered once the contact is judged, the cut-in time of the closed-loop control can be accurately judged, closed-loop strip steel tension control and loop angle control can be accurately carried out, and then the accurate closed-loop control is achieved, so that the angle of the loop and the running speed of the strip steel can be adjusted.
In addition, in the closed-loop control stage, the steps of obtaining the angle, the angular velocity data and the pressure data of the loop can be continuously executed, and the loop is circulated, so that the tension of the strip steel among the frames is relatively stable, the accurate judgment of the cut-in time of the closed-loop control is realized, the phenomenon of loop picking is reduced, and the steel drawing condition is relieved.
In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.
First, it is noted that the term "and/or" appearing herein is merely an associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In a first aspect, a rolling process control method provided in an embodiment of the present invention is applied to a loop arranged between racks of a finishing mill group, and as shown in fig. 1, the method provided in the embodiment of the present invention includes the following steps:
step S101: and acquiring actual angle data, angular speed data and pressure data of the loop.
In step S101, the angle data is specifically an included angle between the swing arm of the loop and the rolling horizontal line, and in specific implementation, the angle data may be obtained by an angle sensor.
Specifically, for convenience of understanding the position relationship between the loop swing arm and the rolling horizontal line, please refer to the schematic diagram of the loop structure in fig. 2, the loop swing arm 1 can rotate around the support base 3 under the driving of the hydraulic rod 2, the hydraulic rod 2 makes a telescopic motion under the driving of the hydraulic cylinder 4, and the rolling horizontal line 5 is parallel to the ideal moving direction of the strip steel.
Of course, besides the angle sensor, a distance sensor can be arranged at any position of the loop swing arm, the height between the loop swing arm and the ground is measured by the distance sensor, and the included angle between the loop swing arm and the rolling horizontal line can be calculated by utilizing a conversion formula of the side length of the triangle. In addition, the distance sensor may be provided on the loop swing arm, or may be provided on the ground, a wall, a ceiling, or the like, which can measure the position of the loop swing arm.
In the specific implementation of step S101, the angular velocity data of the loop is acquired through step A1. The step A1 specifically comprises the following steps: acquiring the rotation angle of the loop in the last scanning period, the rotation angle of the loop in the current scanning period and the time of the scanning period; angular velocity data is determined based on the following equation:
Figure BDA0003001912180000051
wherein S is angular velocity data, D 1 Is the rotation angle of the loop in the last scanning period, D 2 Is the rotation angle of the loop in the current scanning period, and T is the time of the scanning period.
Specifically, the angular velocity data of the loop swing arm can be monitored in real time through a Programmable Logic Controller (PLC) arranged on the loop.
For example, the rotation angle of the loop in the last scanning period is 13deg, the rotation angle of the loop in the current scanning period is 13.3deg, and the scanning period of the PLC is 0.03 s/time, which are obtained by the PLC.
In the actual implementation process, more than the PLC can scan the rotation angle of the loop, such as an angle sensor, a high-precision laser radar or a high-resolution camera can capture the rotation angle of the loop, and on the basis, the angular velocity data of the loop can be calculated by combining the difference between the last scanning time and the current scanning time.
In the implementation of step S101, pressure data of the loop is obtained through step A2. The step A2 specifically comprises the following steps: monitoring the actual pressure value of the loop; and recording the duration of the actual pressure value being greater than the preset pressure value in the process of monitoring the actual pressure value being greater than the preset pressure value.
It can be understood that a pressure sensor can be arranged on the hydraulic cylinder of the loop, and the actual pressure value of the hydraulic cylinder is monitored in real time through the pressure sensor.
For example, the preset pressure value may be set to 60kN, and when the pressure sensor detects the actual pressure value of the hydraulic cylinder, for example, 60.1kN; and starting to record the time length of 60.1kN greater than 60kN, and stopping timing when the actual pressure value is monitored to be equal to the preset pressure value. Assuming that the duration recorded that the actual pressure value is greater than 60KN is 300 milliseconds; the pressure data of the loop is finally obtained as follows: the duration of the actual pressure value is 300 milliseconds under the condition of being greater than 60 KN; it should be noted that, the preset pressure value is not a fixed value, and in the implementation process, the preset pressure value varies according to the variation of the thickness and the width of the strip steel, for example, when the width of the strip steel is 1050mm, the thickness of the strip steel is 1.55mm, and the steel grade is QS340-P, the corresponding preset pressure value is 50 kN-145 kN, specifically, 81kn,61kn,50kn,55kn,52kn,143kn; when the width of the strip steel is 1212mm, the thickness is 2.02mm and the steel grade is QS420-P, the corresponding preset pressure value is 55 kN-185 KN, specifically 98KN,75KN,58KN,65KN,59KN and 181kN.
In addition, it should be noted that: in the specific implementation process of the step A2, the duration and the pressure difference rate are in a positive correlation, and the pressure difference rate is the rated pressure value of the difference ratio between the rated pressure value and the actual pressure value.
That is, when the pressure difference is smaller, the duration is also reduced accordingly, for example, when the pressure difference rate is 5%, the duration is 0.2s, and when the pressure difference rate is reduced to 0%, the duration is also reduced to 0.1s; if the rated pressure value of the hydraulic cylinder is 100kN, the actual pressure value is 95kN, and at the moment, the pressure difference rate is 5%; if the rated pressure value of the hydraulic cylinder is 50kN, the actual pressure value is monitored to be 50kN, and the pressure difference rate is 0 percent at the moment.
Step S102: if any one of the following conditions is detected, closed-loop control over the loop is triggered: the angle data is greater than the preset angle data, the angular velocity data is less than the preset angular velocity data, and the pressure data is greater than the preset pressure data; wherein the closed-loop control comprises strip steel tension control and loop angle control.
For example, the preset angle data may be set to 22 °, the preset angular velocity data may be set to 2deg/s, and the pressure data may be set to: the duration is 0.3s for actual pressure values greater than 50 kN. Provided that either of the following conditions is detected:
the first condition is as follows: and detecting that the actual included angle between the swing arm of the loop and the rolling horizontal line is 13 degrees, and triggering closed-loop control of the loop when the actual angle data representing the loop is larger than the preset angle data.
Case two: and detecting that the actual angular speed data of the loop is 1deg/s, representing that the actual angular speed data of the loop is less than the preset angular speed data, and triggering closed-loop control of the loop.
Case three: the actual pressure data of the loop is detected as follows: and when the actual pressure value is more than 50kN, the duration is 0.3s, which represents that the actual pressure data of the loop is more than the preset pressure data, and the closed-loop control of the loop is triggered.
Specifically, the closed-loop control comprises strip steel tension control and loop angle control, the strip steel tension control is to calculate a preset pressure value of a loop hydraulic cylinder according to the current actual angle of a loop, and the preset pressure value is compared with the actual pressure value and output to a hydraulic control system, so that the actual tension reaches the preset pressure value; the loop angle control is that the loop control system outputs a speed compensation value aiming at the front frame according to the deviation of the preset angle and the actual angle of the loop, and the rolling mill speed control system automatically controls the speed of the rolling mill after receiving the speed compensation value, thereby realizing the control of the loop angle. In addition, after the closed loop control of the loop is triggered, the execution of step S101 is continued.
Through the judgment of the actual angle data, the actual angular velocity data and the actual pressure data of the loop in the steps, whether the loop is in contact with the strip steel or not can be judged more accurately, and therefore the time for switching from closed-loop control to closed-loop control is more accurate.
In order to improve the reliability of loop closed-loop control and avoid misjudging the contact between the loop and the strip steel, the embodiment of the invention also comprises the following steps of B1-B4:
step B1: acquiring the actual loop start execution time of the loop, specifically, recording the continuous time of the loop motion from the moment when the loop starts to move until the loop stops moving, wherein the continuous time of the loop motion is the actual loop start execution time of the loop. For example: and starting to time by the timer after the loop starts to move, and when the loop stops moving, keeping the time by the timer for 0.6s, so that the actual loop starting execution time of the loop is 0.6s.
And step B2: and checking whether the angle data, the angular speed data and the pressure data are failure data.
Specifically, the step B2 specifically includes the following steps B21 to B23:
b21, when the angle data are detected to be larger than the preset angle data, checking whether the angle data exceed the preset angle range; and when the angle data exceeds the preset angle range, judging the angle data to be failure data.
In a specific implementation, the preset angle range may be set to 10 ° to 62 °.
For example, if the preset angular velocity data is set to 10 °, if the actual angle data of the loop is detected to be 12 °, since the actual angle data of the loop is greater than the preset angle data, it is necessary to check whether the angle data exceeds the preset angle range: if the angle data is 12 degrees and does not exceed the preset angle range, judging the angle data to be valid data; if the actual angle data of the loop is detected to be 63 degrees, although the actual angle data is larger than the preset angle data by 10 degrees, the actual angle data exceeds the preset angle range of 10 degrees to 62 degrees, and the angle data is judged to be failure data.
B22, when the angular velocity data are detected to be larger than the preset angular velocity data, checking whether the angular velocity data are larger than a preset threshold value; and when the angular velocity data is larger than the preset threshold value, judging that the angular velocity data is failure data.
In particular implementation, the preset threshold may be set to 10deg/s. It should be noted that the preset threshold may be set to different values for different loops, such as 25deg/s, 30deg/s, 35deg/s, etc.
For example, the preset angular velocity data may be set to 10deg/s, the actual angular velocity data of the loop is detected to be 21deg/s, and as the actual angular velocity data of the loop is greater than the preset angular velocity data, it is required to check whether the angular velocity data is greater than the preset threshold value: if the preset threshold value is set to be 20deg/s, the angular velocity data is 21deg/s, and the angular velocity data is already greater than the preset threshold value of 20deg/s, the angular velocity data is judged to be failure data; if the actual angular velocity data of the loop is detected to be 15deg/s, firstly, the angular velocity data is greater than the preset angular velocity data by 10deg/s, and secondly, the angular velocity data is not greater than the preset threshold value by 20deg/s, so that the angular velocity data is determined to be valid data.
B23, when the pressure data are detected to be larger than the preset pressure data, checking whether the pressure value is in a preset error range; and when the pressure value exceeds the preset error range, judging the pressure data to be failure data.
In specific implementation, the preset pressure data may be set as: the duration is 0.3s for actual pressure values greater than 60 kN.
For example, the preset pressure data may be set as: the duration is 0.3s under the condition that the actual pressure value is greater than 60kN, and the detected actual pressure data of the loop is as follows: the duration is 0.4s under the condition that the actual pressure value is greater than 60kN, so that the actual pressure data of the loop is greater than the preset pressure data, and whether the pressure value is within the preset error range is checked subsequently:
specifically, two groups of pressure sensors are respectively arranged in a rod cavity and a plug cavity of the hydraulic cylinder, the deviation detected by the two pressure sensors in the same cavity is compared, if the actual pressure values detected by the two pressure sensors in the plug cavity are 180bar and 181bar respectively, the actual pressure values detected by the two pressure sensors in the rod cavity are 136bar and 133bar respectively, the error of the pressure value in the plug cavity is 1bar at the moment, and the error of the pressure value in the rod cavity is 3bar; if the preset error range is set to be-5 bar, the pressure value of the loop is within the preset error range, and the pressure data with the duration of 0.4s under the condition that the actual pressure value is greater than 60kN can be judged as valid data; if the preset error range is set to be-2 bar, the error of the pressure value in the rod cavity exceeds the preset error range, so that the actual pressure data of the loop exceeds the preset error range, and the pressure data with the duration of 0.4s is judged to be failure data when the actual pressure value is greater than 60 kN.
It should be noted that B21, B22, and B23 are steps executed independently, and there is no strict order of sequence.
And step B3: and if the angle data, the angular velocity data and the pressure data are failure data, judging whether the sleeve starting execution time is greater than a preset sleeve starting execution time.
In specific implementation, for different loops, the actual loop start execution time corresponding to the loop may be set to be between 0.4s and 1.6s, for example, 1.5s, 1s, 0.8s, 0.5s, and the like.
And step B4: and when the sleeve starting execution time is greater than the preset sleeve starting execution time, triggering closed-loop control on the loop.
For example, if it is detected that the actual loop start execution time of the loop is 2s and the preset loop start execution time is 1s, because the loop start execution time is greater than the preset loop start execution time, the closed-loop control of the loop is triggered; if the loop is detected to be actually set up for 0.8s and the preset loop set up time is set up for 1s, the loop set up execution time is smaller than the preset loop set up execution time, and therefore closed-loop control over the loop cannot be triggered.
In a second aspect, based on the same inventive concept, an embodiment of the present invention provides a rolling process control apparatus, referring to the rolling process control apparatus shown in fig. 3, including:
a data acquisition unit 301, configured to acquire actual angle data, angular velocity data, and pressure data of the loop;
a detection triggering unit 302, configured to trigger closed-loop control over the loop if any one of the following conditions is detected: the angle data is larger than the preset angle data, the angular velocity data is smaller than the preset angular velocity data, and the pressure data is larger than the preset pressure data; wherein the closed-loop control comprises strip steel tension control and loop angle control.
In an optional implementation, the data obtaining unit 301 includes:
the angular velocity data acquisition subunit is used for acquiring the rotation angle of the loop in the last scanning period, the rotation angle of the loop in the current scanning period and the time of the scanning period; angular velocity data is determined based on the following equation:
Figure BDA0003001912180000101
wherein S is angular velocity data, D 1 Is the rotation angle of the loop in the last scanning period, D 2 Is the rotation angle of the loop in the current scanning period, and T is the time of the scanning period.
In an optional implementation, the data obtaining unit 301 includes:
the pressure data acquisition subunit is used for monitoring the actual pressure value of the loop; in the process of monitoring that the actual pressure value is greater than the preset pressure value, recording the duration of the actual pressure value which is greater than the preset pressure value, and judging whether the duration is greater than the preset duration or not; if the duration is longer than the preset duration, the representation pressure data is longer than the preset pressure data, wherein the duration and the pressure difference rate are in positive correlation, and the pressure difference rate is the rated pressure value in the difference ratio of the rated pressure value and the preset pressure value.
In an alternative embodiment, the rolling process control apparatus further includes:
the loop starting time acquiring unit is used for acquiring actual loop starting execution time of the loop;
the calibration unit is used for calibrating whether the angle data, the angular velocity data and the pressure data are failure data or not; if the angle data, the angular velocity data and the pressure data are failure data, judging whether the sleeve starting execution time is greater than a preset sleeve starting execution time;
and the alternative trigger unit is used for triggering closed-loop control on the loop when the loop starting execution time is greater than the preset loop starting execution time.
In an optional embodiment, the verification unit includes:
the angle data checking unit is used for checking whether the angle data exceeds a preset angle range when the angle data is detected to be larger than the preset angle data; and when the angle data exceeds the preset angle range, judging the angle data to be failure data.
The angular velocity data checking unit is used for checking whether the angular velocity data is greater than a preset threshold value when the angular velocity data is detected to be less than the preset angular velocity data; and when the angular velocity data is larger than the preset threshold value, judging that the angular velocity data is invalid data.
The pressure data checking unit is used for checking whether the pressure value is within a preset error range when the pressure data is detected to be larger than the preset pressure data; and when the pressure value exceeds the preset error range, judging the pressure data to be failure data.
In an optional implementation manner, the verification triggering unit 302 is specifically configured to:
the step of acquiring angle, angular velocity data and pressure data of the loop is performed after triggering the closed loop control of the loop.
Since the rolling process control device described in this embodiment is an electronic device used for implementing the rolling process control method in the embodiment of the present invention, based on the rolling process control method described in this embodiment of the present invention, a person skilled in the art can understand the specific implementation manner of the electronic device in this embodiment and various modifications thereof, and therefore, how to implement the method in the embodiment of the present invention by the electronic device is not described in detail herein. The electronic equipment used by those skilled in the art to implement the rolling process control method in the embodiments of the present invention is within the scope of the present invention.
In a third aspect, based on the same inventive concept, embodiments of the present invention provide a rolling process control apparatus. Referring to fig. 4, a rolling process control apparatus according to an embodiment of the present invention includes: a memory 401, a processor 402 and code stored on the memory and executable on the processor 402, the processor 402 when executing the code implementing any of the foregoing rolling process control method embodiment one.
Where in fig. 4 a bus architecture (represented by bus 400), bus 400 may include any number of interconnected buses and bridges, bus 400 linking together various circuits including one or more processors, represented by processor 402, and memory, represented by memory 401. The bus 400 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 406 provides an interface between the bus 400 and the receiver 403 and transmitter 404. The receiver 403 and the transmitter 404 may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 402 is responsible for managing the bus 400 and general processing, and the memory 401 may be used for storing data used by the processor 402 in performing operations.
Fourth aspect, based on the same inventive concept, as shown in fig. 5, the present embodiment provides a computer-readable storage medium 500, on which a computer program 501 is stored, wherein the program 501, when executed by a processor, implements any of the embodiments of the first aspect of the rolling process control method described above.
The technical scheme in the embodiment of the invention at least has the following technical effects or advantages:
1. firstly, acquiring actual angle, angular velocity data and pressure data of a loop; if it is detected: if the angle is larger than the preset angle, the angular speed data is smaller than the preset angular speed data, and the pressure data is larger than the preset pressure data, closed-loop control of the loop can be triggered, and finally the angle of the loop and/or the running speed of the strip steel are/is adjusted through the closed-loop control. In the closed-loop control stage, the steps of obtaining the angle, the angular velocity data and the pressure data of the loop can be continuously executed, and the loop is circulated in such a way, so that the tension of the strip steel among the frames is relatively stable, the accurate judgment of the cut-in time of the closed-loop control is realized, the phenomenon of sleeve picking is reduced, and the steel drawing condition is reduced.
2. When the angle data, the angular velocity data and the pressure data are abnormal data possibly caused by failure of the sensor, the actual loop starting execution time of the loop is obtained, whether the angle data, the angular velocity data and the pressure data are failure data or not is verified, if the angle data, the angular velocity data and the pressure data are all failure data, whether the loop starting execution time is larger than the preset loop starting execution time or not is judged, and when the loop starting execution time is larger than the preset loop starting execution time, closed-loop control over the loop is triggered. The reliability of loop closed-loop control is improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the invention may take the form of a computer product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer instructions. These computer instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (8)

1. A rolling process control method applied to a loop provided between stands of a finishing mill train, the method comprising:
acquiring actual angle data, angular velocity data and pressure data of the loop; wherein the acquiring angular velocity data of the loop comprises: acquiring the rotation angle of the loop in the last scanning period, the rotation angle of the loop in the current scanning period and the time of the scanning period; determining the angular velocity data based on the following formula:
S＝(D_1-D_2)/T
wherein, S is the angular velocity data, D _1 is the rotation angle of the loop in the last scanning period, D _2 is the rotation angle of the loop in the current scanning period, and T is the time of the scanning period;
the acquiring pressure data of the loop comprises: monitoring the actual pressure value of the loop; in the process of monitoring that the actual pressure value is greater than a preset pressure value, recording the duration of the actual pressure value greater than the preset pressure value, and judging whether the duration is greater than a preset duration or not; if the duration is longer than the preset duration, representing that the pressure data is longer than preset pressure data;
triggering closed-loop control of the loop if any one of the following conditions is detected: the angle data is larger than preset angle data, the angular velocity data is smaller than preset angular velocity data, and the pressure data is larger than the preset pressure data; wherein the closed-loop control comprises strip steel tension control and loop angle control.
2. The method of claim 1, wherein the duration is positively correlated to a pressure differential rate, the pressure differential rate being a difference between a nominal pressure value and the preset pressure value over the nominal pressure value.
3. The method of claim 1, further comprising:
acquiring actual sleeve starting execution time of the loop;
checking whether the angle data, the angular velocity data and the pressure data are failure data;
if the angle data, the angular velocity data and the pressure data are failure data, judging whether the sleeve start execution time is greater than a preset sleeve start execution time;
and when the sleeve starting execution time is greater than the preset sleeve starting execution time, triggering closed-loop control on the loop.
4. The method of claim 3, wherein said verifying whether said angle data, said angular velocity data, and said pressure data are failure data comprises:
when the angle data are detected to be larger than the preset angle data, checking whether the angle data exceed a preset angle range; when the angle data exceeds the preset angle range, judging that the angle data are invalid data;
when the angular velocity data is detected to be smaller than the preset angular velocity data, checking whether the angular velocity data is larger than a preset threshold value; when the angular velocity data is larger than the preset threshold value, judging that the angular velocity data is failure data;
when the pressure data is detected to be larger than the preset pressure data, checking whether the pressure data is within a preset error range; and when the pressure data exceeds the preset error range, judging that the pressure data is failure data.
5. The method of claim 1, comprising:
the step of obtaining angle, angular velocity data and pressure data of the loop is performed after the triggering of the closed loop control of the loop.
6. A rolling process control device for a loop disposed between frames of a finishing block, the device comprising:
the data acquisition unit is used for acquiring actual angle data, angular velocity data and pressure data of the loop;
the data acquisition unit is specifically configured to: acquiring the rotation angle of the loop in the last scanning period, the rotation angle of the loop in the current scanning period and the time of the scanning period; determining the angular velocity data based on the following formula:
S＝(D_1-D_2)/T
wherein, S is the angular velocity data, D _1 is the rotation angle of the loop in the last scanning period, D _2 is the rotation angle of the loop in the current scanning period, and T is the time of the scanning period;
the data obtaining unit is specifically further configured to: monitoring the actual pressure value of the loop; in the process of monitoring that the actual pressure value is greater than a preset pressure value, recording the duration of the actual pressure value which is greater than the preset pressure value, and judging whether the duration is greater than a preset duration or not; if the duration is longer than the preset duration, representing that the pressure data is longer than preset pressure data;
the detection triggering unit is used for triggering the closed-loop control of the loop if any one of the following conditions is detected: the angle data is larger than preset angle data, the angular velocity data is smaller than preset angular velocity data, and the pressure data is larger than the preset pressure data; wherein the closed-loop control comprises strip steel tension control and loop angle control.
7. An electronic device, comprising: memory, processor and code stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1-5 when executing the code.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method of any one of claims 1 to 5.
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