Finish rolling temperature convergence feedback control method, device, medium and electronic equipment

Abstract

The present invention provides a method, device, medium, and electronic device for convergence feedback control of finishing rolling temperature, which obtains the controlled thickness of the strip, the measured finishing rolling temperature of the current detection cycle, and the preset temperature correction acceleration of the next detection cycle; determines the preset target range of the finishing rolling temperature of the strip in each detection cycle based on the controlled thickness of the strip; compares the measured finishing rolling temperature of the current detection cycle with the preset target range of the finishing rolling temperature, and corrects the temperature correction acceleration of the next cycle based on the comparison result and the preset temperature correction acceleration of the next detection cycle; and adjusts the rolling speed based on the temperature correction acceleration of the next detection cycle, so that the finishing rolling temperature of the next detection cycle is controlled within the preset target range. The present invention corrects the temperature correction acceleration of the next cycle in advance to achieve convergence feedback control of the finishing rolling temperature, effectively solving the problem of lag in finishing rolling temperature feedback control of thick-gauge strip steel, and effectively improving the finishing rolling temperature control accuracy and rolling stability of thick-gauge strip steel.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical production, and in particular to a finishing rolling temperature convergence feedback control method, device, medium and electronic equipment. Background Art

[0002] In the field of metallurgical production technology, the final rolling temperature of a hot rolling line is the temperature measured when the strip leaves the finishing mill. The final rolling temperature measurement cycle is controlled in stages based on the speed and time required to complete a strip. The accuracy of final rolling temperature control directly affects the strip's deformation resistance, rolling pressure, metallographic structure, grain size, mechanical properties, and surface quality. Therefore, the final rolling temperature must be controlled within a preset target range during each measurement cycle to ensure the stability of the strip production process and product quality. In the existing technology, the control of the final rolling temperature of thick-gauge strip steel is affected by the furnace conditions and calorific value fluctuations of the heating furnace. The intermediate billet finishing rolling entrance temperature often presents a V-shaped temperature curve of "high at both ends and low in the middle", and the final rolling temperature cannot be converged and feedback controlled according to the actual measured final rolling temperature of the current detection cycle during the feedback control process of each detection cycle; after adjusting the temperature correction acceleration and the molten steel between the stands, due to the slow rolling speed of the thick-gauge strip steel, the rolling speed adjustment cannot keep up with the fluctuation of the final rolling temperature in time, causing the final rolling temperature adjustment of the next cycle to lag seriously, resulting in the final rolling temperature control curve of the thick-gauge strip steel being a V-shaped or W-shaped temperature curve, the final rolling temperature fluctuating greatly along the entire length, and the thick-gauge final rolling temperature control accuracy and rolling stability being reduced.

[0003] Therefore, when producing thick-gauge strip steel, how to control the final rolling temperature within a certain temperature range to ensure the control accuracy of the final rolling temperature and the stability of rolling is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the present invention provides a technical solution for convergence feedback control of the final rolling temperature, which obtains the controlled thickness of the strip, the measured final rolling temperature of the current detection cycle, and the preset temperature correction acceleration of the next detection cycle, determines the preset target range of the final rolling temperature of the strip in each detection cycle based on the controlled thickness of the strip, compares the measured final rolling temperature of the current detection cycle with the preset target range of the final rolling temperature, controls the temperature correction acceleration of the next detection cycle based on the comparison result and the preset temperature correction acceleration of the next detection cycle, and adjusts the rolling speed so that the final rolling temperature of the next detection cycle is controlled within the preset target range. The present application realizes dynamic convergence feedback adjustment of the final rolling temperature of the next detection cycle, thereby improving the control accuracy and production stability of the final rolling temperature of thick-gauge strip.

[0005] To achieve the above-mentioned purpose and other related purposes, the technical solutions provided by the present invention are as follows.

[0006] A finishing rolling temperature convergence feedback control method, comprising:

[0007] Obtain the controlled thickness of the strip, the measured final rolling temperature of the current test cycle, and the temperature-corrected acceleration for the next test cycle. The test cycle is obtained by segmenting the entire length of the strip based on the speed and time it takes to complete a piece of strip rolling.

[0008] Determining a preset target range of the final rolling temperature of the strip in each detection cycle according to the controlled thickness of the strip;

[0009] Comparing the measured finishing temperature of the current detection cycle with a preset target range of the finishing temperature, and correcting the temperature correction acceleration of the next detection cycle according to the comparison result and the preset temperature correction acceleration of the next detection cycle;

[0010] The rolling speed is adjusted according to the temperature-corrected acceleration of the next detection cycle, so that the final rolling temperature of the next detection cycle is controlled within the preset target range.

[0011] In the technical solution provided in the embodiments of the present application, the preset target range of the final rolling temperature of the strip in each detection cycle is determined based on the controlled thickness of the strip, including: when the controlled thickness of the strip is within the preset first thickness range, the preset first target control range is used as the preset target range of the final rolling temperature; when the controlled thickness of the strip exceeds the upper limit of the first thickness range, the preset second target control range is used as the preset target range of the final rolling temperature; wherein the preset first control range includes the preset second control range.

[0012] In the technical solution provided in the embodiment of the present application, when the controlled thickness of the strip steel is within a preset first thickness range, the temperature correction acceleration of the next detection cycle is corrected according to the comparison result and the preset temperature correction acceleration of the next detection cycle, including: if the measured final rolling temperature of the current detection cycle is less than the preset first target final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a negative value, the preset first acceleration is used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and final rolling temperature of the next detection cycle; wherein, the first target final rolling temperature is a negative value and is greater than the lower limit of the preset target range of the final rolling temperature; if the current detection cycle When the actual measured final rolling temperature of the current detection cycle is less than the lower limit of the preset target range of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a negative value, the preset second acceleration is used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and final rolling temperature of the next detection cycle, wherein the preset second acceleration is greater than the preset first acceleration; if the actual measured final rolling temperature of the current detection cycle is greater than the upper limit of the preset target range of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a positive value, the preset third acceleration is used as the temperature correction acceleration of the next detection cycle to reduce the rolling speed and final rolling temperature of the next detection cycle.

[0013] In the technical solution provided in the embodiments of the present application, when the controlled thickness of the strip exceeds the upper limit of the first thickness range, the temperature correction acceleration of the next detection cycle is corrected according to the comparison result and the preset temperature correction acceleration of the next detection cycle, including: if the measured final rolling temperature of the current detection cycle is less than the lower limit of the preset target range of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a negative value, the preset fourth acceleration is used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and final rolling temperature of the next detection cycle; if the measured final rolling temperature of the current detection cycle is greater than the upper limit of the preset target range of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a positive value, the preset fifth acceleration is used as the temperature correction acceleration of the next detection cycle to reduce the rolling speed and final rolling temperature of the next detection cycle.

[0014] In the technical solution provided in the embodiments of the present application, the rolling speed is adjusted according to the temperature-corrected acceleration of the next detection cycle, including: if the temperature-corrected acceleration of the next detection cycle is a positive value, the rolling speed is increased to increase the final rolling temperature; if the temperature-corrected acceleration of the next detection cycle is a negative value, the rolling speed is reduced to reduce the final rolling temperature.

[0015] In the technical solution provided in the embodiments of the present application, the first thickness range includes 12 mm to 15 mm, the preset first target control range includes -10°C to +10°C; and the preset second target control range includes -5°C to +5°C.

[0016] According to one aspect of an embodiment of the present application, a device for convergence feedback control of final rolling temperature is provided, which includes: a data acquisition module for collecting the controlled thickness of the strip, the measured final rolling temperature of the current detection cycle, and the preset temperature correction acceleration of the next detection cycle; wherein the detection cycle is obtained by segmented control of the entire length of the strip based on the speed and time of rolling a piece of strip; a range determination module for determining the preset target range of the final rolling temperature of the strip in each detection cycle based on the controlled thickness of the strip; a data processing module for comparing the measured final rolling temperature of the current detection cycle with the preset target range of the final rolling temperature, so as to correct the temperature correction acceleration of the next detection cycle according to the comparison result and the preset temperature correction acceleration of the next detection cycle; an adjustment module for adjusting the rolling speed according to the temperature correction acceleration of the next detection cycle, so that the final rolling temperature of the next detection cycle is controlled within the preset target range.

[0017] According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, on which computer-readable instructions are stored. When the computer-readable instructions are executed by a processor of a computer, the computer executes the finish rolling temperature convergence feedback control method as described above.

[0018] According to one aspect of an embodiment of the present application, an electronic device is provided, comprising: one or more processors; a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the electronic device implements the finish rolling temperature convergence feedback control method as described above.

[0019] The beneficial effects of the present invention are as follows: obtaining the controlled thickness of the strip and the measured final rolling temperature of the current detection cycle and the preset temperature correction acceleration of the next detection cycle; determining the preset target range of the final rolling temperature of the strip in each detection cycle according to the strip control; comparing the measured final rolling temperature of the current cycle with the preset target range of the final rolling temperature, adjusting the temperature correction acceleration of the next detection cycle according to the comparison result and the preset temperature correction acceleration of the next detection cycle, adjusting the rolling speed according to the temperature correction acceleration of the next detection cycle, thereby controlling the final rolling temperature of the next detection cycle within the preset target range. The present invention makes up for the defect of the existing control technology that there is no final rolling temperature convergence feedback control, solves the problem of serious lag in the final rolling temperature feedback control of thick-gauge strip steel, and predicts the final rolling temperature fluctuation direction in advance by dynamically converging and feeding back the temperature correction acceleration of the next detection cycle in advance, effectively avoiding the problem of overshoot of the final rolling temperature feedback control of the next detection cycle, and effectively improving the final rolling temperature control accuracy and rolling stability of thick-gauge strip steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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, serving to explain the principles of the present application. It is obvious that the drawings described below are merely some embodiments of the present application, and a person of ordinary skill in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0021] Figure 1 1 is a flowchart of a method for controlling the convergence and feedback of the finishing rolling temperature according to an exemplary embodiment of the present application;

[0022] Figure 2 1 is a schematic diagram showing an exemplary embodiment of the present application showing an X-ray measurement of strip thickness control;

[0023] Figure 3 1 is a schematic diagram of the structure of a device for finishing rolling temperature convergence feedback control according to an exemplary embodiment of the present application;

[0024] Figure 4 It is a structural diagram of a computer system corresponding to an electronic device shown in an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0026] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0027] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring the embodiments of the present invention.

[0028] During hot rolling, the final rolling temperature is the temperature measured when the strip leaves the finishing mill. This temperature is preset and controlled via real-time feedback from a process control computer. The accuracy of final rolling temperature control directly impacts rolling stability and strip quality. The final rolling temperature measurement cycle is related to the speed and time required to complete a strip, and is achieved by segmented control over the entire strip length.

[0029] The inventors have found that the final rolling temperature of thick-gauge strip steel is affected by the furnace conditions and calorific value fluctuations during the production process. During the final rolling temperature feedback control process, it is impossible to accurately feedback-control the final rolling temperature of the next detection cycle in advance based on the finishing rolling inlet temperature, and it is impossible to timely perform convergence feedback control on the final rolling temperature of the next detection cycle based on the actual final rolling temperature of the current detection cycle and the preset temperature correction acceleration of the next detection cycle. After adjusting the temperature correction acceleration and the molten steel between the stands, because the rolling speed of the thick-gauge strip steel is slow, there is a time difference between the rolling speed adjustment and the final rolling temperature fluctuation, and the final rolling temperature adjustment of the next detection cycle is delayed, resulting in the final rolling temperature control curve of the thick-gauge strip steel being a V-shaped or W-shaped temperature curve, and the final rolling temperature fluctuates greatly along the entire length, which reduces the control accuracy of the final rolling temperature and the rolling stability.

[0030] In order to solve the above problems, the present invention obtains the controlled thickness of the strip, the measured final rolling temperature of the current detection cycle and the preset temperature correction acceleration of the next detection cycle, determines the preset target range of the final rolling temperature of the strip within the detection cycle through the controlled thickness of the strip, compares the measured final rolling temperature of the current cycle with the preset target range of the final rolling temperature, obtains a comparison result, and adjusts the temperature correction acceleration of the next detection cycle according to the comparison result and the preset temperature correction acceleration of the next detection cycle to control the rolling speed of the next detection cycle, control the final rolling temperature within the preset target range, and realize dynamic convergence feedback control of the final rolling temperature.

[0031] like Figure 1 As shown, in one embodiment of the present application, a finishing temperature convergence feedback control method includes at least the steps of:

[0032] S110, obtaining the controlled thickness of the strip, the measured final rolling temperature of the current detection cycle, and the temperature-corrected acceleration of the preset next detection cycle; wherein the detection cycle is obtained by segmentally controlling the entire length of the strip based on the speed and time of completing a piece of strip rolling;

[0033] S120, determining a preset target range of the final rolling temperature of the strip in each detection cycle according to the controlled thickness of the strip;

[0034] S130, comparing the measured final rolling temperature of the current detection cycle with a preset target range of the final rolling temperature, and correcting the temperature correction acceleration of the next detection cycle according to the comparison result and the preset temperature correction acceleration of the next detection cycle;

[0035] S140 , adjusting the rolling speed according to the temperature-corrected acceleration of the next detection cycle, so that the final rolling temperature of the next detection cycle is controlled within a preset target range.

[0036] In detail, in an exemplary embodiment of the present application, step S110 of obtaining the controlled thickness of the strip, the measured final rolling temperature of the current detection cycle, and the temperature correction acceleration of the preset next detection cycle includes: measuring the controlled thickness of the strip by X-ray or laser measurement of the controlled thickness of the strip, collecting the measured final rolling temperature of the current detection cycle by a two-color infrared thermometer, and calculating the temperature correction acceleration based on the speed difference and time difference of the current cycle.

[0037] In more detail, in an exemplary embodiment of the present application, Figure 2As shown, strip thickness is controlled by X-ray measurement: When X-rays strike an object, the attenuation intensity of the X-rays is converted to a thickness measurement, i.e., the amount of X-rays absorbed by the object being measured. The thickness of the object is determined based on the energy of these X-rays. The X-ray detector converts the received signal into an electrical signal, which is amplified by a signal sampling and amplification unit. A computer signal processing unit then processes the amplified electrical signal into a visually identifiable actual thickness signal. Strip thickness is controlled by laser measurement: Laser light is irradiated onto the surface of the object, creating an image formed by the scattered light. A charge coupled device converts the image signal into an electrical signal, which is then used to measure the position of the image point. As the strip moves, the image point moves accordingly, allowing the displacement to be calculated. During the detection process, the double triangulation method of the upper and lower surfaces of the laser is used to accurately measure the thickness of the moving object. The laser thickness gauge is composed of a laser, an imaging objective lens, a signal processor and a photoelectric potential-sensitive receiver to display the measurement results. During the measurement process, the laser beam will form a light spot on the surface of the object being measured, and then the imaging objective lens will image the light spot onto the photosensitivity of the photosensitive receiver, and then generate an electrical signal. When the object being measured moves, the position of the light spot on the surface changes, and the position of the imaging point on the photoelectric potential-sensitive receiver will also change, completing the measurement of the controlled thickness of the strip.

[0038] In detail, in an exemplary embodiment of the present application, step S120 of determining a preset target range of the finishing temperature of the strip in each detection cycle according to the controlled thickness of the strip includes:

[0039] S210: When the controlled thickness of the strip steel is within a preset first thickness range, the preset first target control range is used as a preset target range of the finishing temperature;

[0040] S220. When the controlled thickness of the strip exceeds the upper limit of the first thickness range, the preset second target control range is used as the preset target range of the finishing temperature; wherein the preset first control range includes the preset second control range.

[0041] In more detail, in an exemplary embodiment of the present application, the preset first thickness range is 12 mm to 15 mm. If 12 mm ≤ X ≤ 15 mm, the preset first target control range [-10°C, +10°C] is used as the target control range of the strip in each detection cycle; if X>15 mm, the preset second target control range [-5°C, +5°C] is used as the target control range of the strip in each detection cycle, where X is the controlled thickness of the strip.

[0042] After determining the preset target range of the final rolling temperature of the strip in each detection cycle, the measured final rolling temperature of the current detection cycle is compared with the preset target range of the final rolling temperature through step S130 to correct the temperature correction acceleration of the next detection cycle based on the comparison result and the preset temperature correction acceleration of the next detection cycle.

[0043] In more detail, in an exemplary embodiment of the present application, when the controlled thickness of the strip steel is within a preset first thickness range, the measured finishing temperature of the current detection cycle is compared with a preset target range of the finishing temperature, and the temperature correction acceleration of the next detection cycle is corrected according to the comparison result and the preset temperature correction acceleration of the next detection cycle, including:

[0044] If the measured finishing temperature of the current detection cycle is lower than the preset first target finishing temperature, and the temperature correction acceleration of the next detection cycle is negative, the preset first acceleration is used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and finishing temperature of the next detection cycle; wherein the first target finishing temperature is negative and greater than the lower limit of the preset target range of the finishing temperature;

[0045] If the measured final rolling temperature of the current detection cycle is less than the lower limit of the preset target range of the final rolling temperature, and the temperature correction acceleration of the next detection cycle is negative, the preset second acceleration is used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and the final rolling temperature of the next detection cycle, wherein the preset second acceleration is greater than the preset first acceleration;

[0046] If the measured final rolling temperature of the current detection cycle is greater than the upper limit of the preset target range of the final rolling temperature, and the temperature correction acceleration preset for the next detection cycle is a positive value, the preset third acceleration will be used as the temperature correction acceleration for the next detection cycle to reduce the rolling speed and final rolling temperature of the next detection cycle.

[0047] It should be noted that, in an exemplary embodiment of the present application, if 12mm≤controlled strip thickness≤15mm, that is, the controlled strip thickness belongs to the preset first thickness range, the preset target range of the finishing temperature is the preset first target control range [-10°C, +10°C], the measured finishing temperature of the current detection cycle is compared with the preset first target control range to obtain a comparison result, and the temperature correction acceleration of the next detection cycle is adjusted according to the comparison result and the preset temperature correction acceleration of the next detection cycle. For example, if the measured finishing temperature of the current detection cycle is -6°C, the preset first target finishing temperature is -5°C, the measured finishing temperature of the current detection cycle -6°C is less than the preset first target finishing temperature -5°C, and the preset temperature correction acceleration of the next detection cycle is a negative number, the preset first acceleration + 0.01 (m / s2) is used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and finishing temperature of the next detection cycle, wherein the first target finishing temperature is negative number and greater than the lower limit value of the preset first target control range of -10°C; if the measured final rolling temperature of the current detection cycle is -12°C, the measured final rolling temperature of the current detection cycle is less than the lower limit value of the preset first target control range of -10°C, and the preset temperature correction acceleration of the next detection cycle is a negative number, the preset second acceleration +0.03 (m / s2) is used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and final rolling temperature of the next detection cycle, wherein the preset second acceleration +0.03 (m / s2) is greater than the preset first acceleration +0.01 (m / s2); if the measured final rolling temperature of the current detection cycle is +15°C, the measured final rolling temperature of the current detection cycle is greater than the upper limit value of the preset first target control range of +10°C, and the preset temperature correction acceleration of the next detection cycle is a positive number, the preset third acceleration -0.01 (m / s2) is used as the temperature correction acceleration of the next detection cycle to reduce the rolling speed and final rolling temperature of the next detection cycle.

[0048] In more detail, in an exemplary embodiment of the present application, when the controlled thickness of the strip exceeds the upper limit of the first thickness range, the temperature correction acceleration of the next detection cycle is corrected according to the comparison result and the preset temperature correction acceleration of the next detection cycle, including:

[0049] If the measured final rolling temperature of the current detection cycle is less than the lower limit of the preset target range of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a negative value, the preset fourth acceleration is used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and final rolling temperature of the next detection cycle;

[0050] If the measured final rolling temperature of the current detection cycle is greater than the preset target range upper limit of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a positive value, the preset fifth acceleration will be used as the temperature correction acceleration of the next detection cycle to reduce the rolling speed and final rolling temperature of the next detection cycle.

[0051] It should be emphasized that, in an exemplary embodiment of the present application, if the controlled thickness of the strip is greater than 15 mm, that is, the controlled thickness of the strip is greater than the upper limit of the first thickness interval, the preset target range of the finishing temperature is the preset second target control range [-5°C, +5°C]. The measured finishing temperature of the current detection cycle is compared with the preset second target control range to obtain a comparison result. The temperature correction acceleration of the next detection cycle is adjusted according to the comparison result and the preset temperature correction acceleration of the next detection cycle. For example, if the measured finishing temperature of the current detection cycle is -6°C, the lower limit of the preset second target control range is -5°C, and the measured finishing temperature of the current detection cycle is -6°C less than the lower limit of the preset second target control range - 5℃, and the preset temperature correction acceleration of the next detection cycle is a negative number, the preset fourth acceleration +0.01 (m / s2) will be used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and the final rolling temperature of the next detection cycle; if the measured final rolling temperature of the current detection cycle is +7℃, the upper limit of the preset second target control range is +5℃, then the measured final rolling temperature of the current detection cycle +7℃ is greater than the upper limit value of the preset second target control range +5℃, and the preset temperature correction acceleration of the next detection cycle is a positive value, the preset fifth acceleration -0.01 (m / s2) will be used as the temperature correction acceleration of the next detection cycle to reduce the rolling speed and the final rolling temperature of the next detection cycle.

[0052] Specifically, in an exemplary embodiment of the present application, adjusting the rolling speed based on the temperature-corrected acceleration of the next detection cycle includes: if the temperature-corrected acceleration of the next detection cycle is a positive value, increasing the rolling speed to increase the final rolling temperature; if the temperature-corrected acceleration of the next detection cycle is a negative value, decreasing the rolling speed to decrease the final rolling temperature. For example, when the temperature-corrected acceleration of the next detection cycle is +0.01 (m / s2), the rolling speed of the rolling mill is increased by the positive temperature-corrected acceleration to increase the final rolling temperature of the next detection cycle; when the temperature-corrected acceleration of the next detection cycle is -0.03 (m / s2), the rolling speed of the rolling mill is decreased by the negative temperature-corrected acceleration to decrease the final rolling temperature of the next detection cycle.

[0053] In more detail, in an exemplary embodiment of the present application, the first thickness range includes 12 mm to 15 mm, the preset first target control range includes -10°C to +10°C, and the preset second target control range includes -5°C to +5°C.

[0054] In the specific embodiment described in the present application, the controlled thickness of the strip, the measured final rolling temperature of the current detection cycle, and the preset temperature correction acceleration of the next detection cycle are collected, and the preset target range of the final rolling temperature of the strip in each detection cycle is determined according to the controlled thickness of the strip; the measured final rolling temperature of the current detection cycle is compared with the preset target range of the final rolling temperature to obtain a comparison result, and the temperature correction acceleration of the next detection cycle is adjusted according to the comparison result and the preset temperature correction acceleration of the next detection cycle. The rolling speed is controlled based on the temperature correction acceleration of the next detection cycle, and the final rolling temperature of the next detection cycle is controlled within the preset target range. The present invention solves the serious lag problem of the feedback control of the final rolling temperature of thick-gauge strip in the prior art, dynamically converges the feedback control temperature correction acceleration of the next detection cycle in advance, predicts the direction of final rolling temperature fluctuation in advance, avoids the overshoot problem of the feedback control of the final rolling temperature of thick-gauge strip, and effectively improves the final rolling temperature control accuracy and rolling stability of thick-gauge strip.

[0055] like Figure 3 As shown, the exemplary apparatus for finishing temperature convergence feedback control includes:

[0056] Data acquisition module 310 is used to collect the controlled thickness of the strip, the measured final rolling temperature of the current test cycle, and the temperature-corrected acceleration of the next test cycle. The test cycle is obtained by segmenting the entire length of the strip based on the speed and time of rolling a piece of strip.

[0057] A range determination module 320 is configured to determine a preset target range of the finishing temperature of the strip in each detection cycle based on the controlled thickness of the strip;

[0058] The data processing module 330 is used to compare the measured final rolling temperature of the current detection cycle with the preset target range of the final rolling temperature, and to correct the temperature correction acceleration of the next detection cycle according to the comparison result and the preset temperature correction acceleration of the next detection cycle;

[0059] The adjustment module 340 is configured to adjust the rolling speed according to the temperature-corrected acceleration of the next detection cycle, so that the final rolling temperature of the next detection cycle is controlled within a preset target range.

[0060] It should be noted that the apparatus for finishing temperature convergence feedback control provided in the above-mentioned embodiment and the method for finishing temperature convergence feedback control provided in the above-mentioned embodiment are based on the same concept. The specific manner in which each module performs its operations has been described in detail in the method embodiment and will not be repeated here. In actual applications, the apparatus for finishing temperature convergence feedback control provided in the above-mentioned embodiment can, as needed, allocate the above-mentioned functions to different functional modules, i.e., divide the internal structure of the apparatus into different functional modules to perform all or part of the functions described above, and this is not a limitation herein.

[0061] Another aspect of the present application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the finish rolling temperature convergence feedback control method described above. The computer-readable storage medium may be included in the electronic device described in the above embodiments, or may exist independently and not be incorporated into the electronic device.

[0062] An embodiment of the present application also provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the electronic device implements the finishing temperature convergence feedback control method provided in the above-mentioned embodiments.

[0063] Figure 4 The following is a schematic diagram showing the structure of a computer system suitable for implementing an electronic device according to an embodiment of the present application. Figure 4 The computer system 4 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0064] like Figure 4 As shown, the computer system 400 includes a central processing unit (CPU) 401, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 402 or the program loaded from the storage part 408 into the random access memory (RAM) 403, such as executing the method described in the above embodiment. Various programs and data required for system operation are also stored in the RAM 403. The CPU 401, ROM 402 and RAM 403 are connected to each other via a bus 404. An input / output (I / O) interface 405 is also connected to the bus 404.

[0065] The following components are connected to the I / O interface 405: an input section 406 including a keyboard, a mouse, and the like; an output section 407 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker; a storage section 408 including a hard disk and the like; and a communication section 409 including a network interface card such as a LAN (Local Area Network) card or a modem. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to the I / O interface 405 as needed. Removable media 411, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 410 as needed, so that computer programs read therefrom can be installed into the storage section 408 as needed.

[0066] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via the communication section 409, and / or installed from a removable medium 411. When the computer program is executed by the central processing unit (CPU) 401, the various functions defined in the system of the present application are executed.

[0067] It should be noted that the computer-readable medium shown in the embodiments of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a 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 of the above. In the present application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable computer program. This propagated data signal can take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. A computer program embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, or any suitable combination thereof.

[0068] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. Among them, each box in the flowchart or block diagram can represent a module, program segment, or part of the code, and the above-mentioned module, program segment, or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0069] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. In some cases, the names of these units do not constitute limitations on the units themselves.

[0070] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, any equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed herein are intended to be encompassed by the present disclosure.

Claims

1. A finishing temperature convergence feedback control method, characterized in that: include: Obtain the controlled thickness of the strip, the measured final rolling temperature of the current test cycle, and the temperature-corrected acceleration for the next test cycle. The test cycle is obtained by segmenting the entire length of the strip based on the speed and time it takes to complete a piece of strip rolling. Determining a preset target range of the final rolling temperature of the strip in each detection cycle according to the controlled thickness of the strip; Comparing the measured finishing temperature of the current detection cycle with a preset target range of the finishing temperature, and correcting the temperature correction acceleration of the next detection cycle according to the comparison result and the preset temperature correction acceleration of the next detection cycle; adjusting the rolling speed according to the temperature-corrected acceleration of the next detection cycle so that the final rolling temperature of the next detection cycle is controlled within the preset target range; Wherein, determining the preset target range of the final rolling temperature of the strip in each detection cycle according to the controlled thickness of the strip includes: When the controlled thickness of the strip steel is within a preset first thickness range, the preset first target control range is used as the preset target range of the finishing temperature; When the controlled thickness of the strip exceeds the upper limit of the first thickness range, a preset second target control range is used as the preset target range of the finishing temperature; wherein the preset first control range includes the preset second control range; When the controlled thickness of the strip steel is within a preset first thickness range, the temperature correction acceleration of the next detection cycle is corrected according to the comparison result and the preset temperature correction acceleration of the next detection cycle, including: If the measured finishing temperature of the current detection cycle is lower than the preset first target finishing temperature, and the preset temperature correction acceleration for the next detection cycle is a negative value, the preset first acceleration is used as the temperature correction acceleration for the next detection cycle to increase the rolling speed and finishing temperature for the next detection cycle; wherein the first target finishing temperature is a negative value and is greater than the lower limit of the preset target range of the finishing temperature; If the measured final rolling temperature of the current detection cycle is less than the lower limit of the preset target range of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a negative value, a preset second acceleration is used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and the final rolling temperature of the next detection cycle, wherein the preset second acceleration is greater than the preset first acceleration; If the measured final rolling temperature of the current detection cycle is greater than the upper limit of the preset target range of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a positive value, the preset third acceleration will be used as the temperature correction acceleration of the next detection cycle to reduce the rolling speed and final rolling temperature of the next detection cycle.

2. The finishing rolling temperature convergence feedback control method according to claim 1, characterized in that: When the controlled thickness of the strip exceeds the upper limit of the first thickness range, the temperature correction acceleration of the next detection cycle is corrected according to the comparison result and the preset temperature correction acceleration of the next detection cycle, including: If the measured final rolling temperature of the current detection cycle is less than the lower limit of the preset target range of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a negative value, the preset fourth acceleration is used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and final rolling temperature of the next detection cycle; If the measured final rolling temperature of the current detection cycle is greater than the upper limit of the preset target range of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a positive value, the preset fifth acceleration will be used as the temperature correction acceleration of the next detection cycle to reduce the rolling speed and final rolling temperature of the next detection cycle.

3. The finishing rolling temperature convergence feedback control method according to claim 2, characterized in that: Adjusting the rolling speed according to the temperature-corrected acceleration of the next detection cycle includes: If the temperature correction acceleration of the next detection cycle is a positive value, increasing the rolling speed to increase the final rolling temperature; If the temperature correction acceleration of the next detection cycle is a negative value, the rolling speed is reduced to reduce the final rolling temperature.

4. The finishing rolling temperature convergence feedback control method according to claim 3, characterized in that: The first thickness range includes 12 mm to 15 mm, the preset first target control range includes -10°C to +10°C; and the preset second target control range includes -5°C to +5°C.

5. A device for convergence feedback control of finishing rolling temperature, characterized in that: include: The data acquisition module is used to collect the controlled thickness of the strip, the measured final rolling temperature of the current test cycle, and the temperature-corrected acceleration of the next test cycle. The test cycle is obtained by segmenting the entire length of the strip based on the speed and time of rolling a piece of strip. a range determination module, configured to determine a preset target range of the finishing temperature of the strip in each detection cycle based on the controlled thickness of the strip; a data processing module, configured to compare the measured finishing temperature of the current detection cycle with a preset target range of the finishing temperature, and to correct the temperature correction acceleration of the next detection cycle according to the comparison result and the preset temperature correction acceleration of the next detection cycle; An adjustment module, configured to adjust the rolling speed according to the temperature-corrected acceleration of the next detection cycle, so that the final rolling temperature of the next detection cycle is controlled within the preset target range; Wherein, determining the preset target range of the final rolling temperature of the strip in each detection cycle according to the controlled thickness of the strip includes: When the controlled thickness of the strip steel is within a preset first thickness range, the preset first target control range is used as the preset target range of the finishing temperature; When the controlled thickness of the strip exceeds the upper limit of the first thickness range, a preset second target control range is used as the preset target range of the finishing temperature; wherein the preset first control range includes the preset second control range; When the controlled thickness of the strip steel is within a preset first thickness range, the temperature correction acceleration of the next detection cycle is corrected according to the comparison result and the preset temperature correction acceleration of the next detection cycle, including: If the measured finishing temperature of the current detection cycle is lower than the preset first target finishing temperature, and the preset temperature correction acceleration for the next detection cycle is a negative value, the preset first acceleration is used as the temperature correction acceleration for the next detection cycle to increase the rolling speed and finishing temperature for the next detection cycle; wherein the first target finishing temperature is a negative value and is greater than the lower limit of the preset target range of the finishing temperature; If the measured final rolling temperature of the current detection cycle is less than the lower limit of the preset target range of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a negative value, a preset second acceleration is used as the temperature correction acceleration of the next detection cycle to increase the rolling speed and the final rolling temperature of the next detection cycle, wherein the preset second acceleration is greater than the preset first acceleration; If the measured final rolling temperature of the current detection cycle is greater than the upper limit of the preset target range of the final rolling temperature, and the preset temperature correction acceleration of the next detection cycle is a positive value, the preset third acceleration will be used as the temperature correction acceleration of the next detection cycle to reduce the rolling speed and final rolling temperature of the next detection cycle.

6. A computer-readable storage medium, characterized in that Computer-readable instructions are stored thereon, and when the computer-readable instructions are executed by a processor of a computer, the computer is caused to execute the finishing rolling temperature convergence feedback control method according to any one of claims 1 to 4.

7. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, enables the electronic device to implement the finishing temperature convergence feedback control method according to any one of claims 1 to 4.

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