A method and system for obtaining the radiation coefficient of strip steel in an annealing furnace

Abstract

The present invention relates to the technical field of strip annealing, and in particular to a method and system for obtaining the strip radiation coefficient of an annealing furnace, the method comprising: obtaining the initial strip radiation coefficient in the soaking furnace section of the annealing furnace; measuring the actual temperature of the strip in real time during the adjustment of the initial strip radiation coefficient; if the target actual temperature measured in real time and the furnace temperature of the soaking furnace section meet the temperature setting condition, then obtaining the adjusted strip radiation coefficient corresponding to the target actual temperature, and using the adjusted strip radiation coefficient as the strip radiation coefficient of the annealing furnace. Therefore, the method measures the actual temperature of the strip based on the adjusted strip radiation coefficient, determines whether the actual temperature of the strip and the furnace temperature of the soaking furnace section meet the temperature setting condition, and determines that the strip radiation coefficient corresponding to the target actual temperature is the strip radiation coefficient of the annealing furnace, thereby ensuring the accuracy of the strip radiation coefficient of the annealing furnace, so that the pyrometer in the annealing furnace can accurately detect the strip.

Description

Technical Field

[0001] The invention relates to the technical field of strip steel annealing, and in particular to a method and a system for obtaining the strip steel radiation coefficient of an annealing furnace. Background Art

[0002] The annealing furnace includes different furnace sections, and a pyrometer is installed at the end of each furnace section. The pyrometer is an important detection instrument of the annealing furnace, which is used to detect the plate temperature of the strip in the annealing furnace in real time, so that the process personnel can understand the quality and material problems of the strip during the annealing process according to the temperature detected by the pyrometer. Therefore, the process personnel regard the pyrometer as an important process monitoring object and the strip temperature detected by the pyrometer as a very important process parameter. However, the most important factor affecting the detection accuracy of the pyrometer is the strip radiation coefficient. The pyrometer must be based on the correct strip radiation coefficient to accurately detect the strip. However, during the annealing process, since the strip radiation coefficient changes with the change of the strip at different times, the strip radiation coefficient cannot be accurately known, which leads to the problem of low accuracy in obtaining the strip radiation coefficient in the annealing furnace. Summary of the invention

[0003] The embodiment of the present application solves the technical problem of low accuracy in obtaining the radiation coefficient of the steel strip in the annealing furnace in the prior art by providing a method and system for obtaining the radiation coefficient of the steel strip in the annealing furnace, thereby achieving a more accurate radiation coefficient of the steel strip in the annealing furnace, thereby improving the technical effect of improving the accuracy of the pyrometer in obtaining the temperature of the steel strip.

[0004] In a first aspect, an embodiment of the present invention provides a method for obtaining the emissivity of a steel strip of an annealing furnace, which is applied to the annealing furnace. The method includes:

[0005] In the soaking furnace section of the annealing furnace, obtaining the initial strip emissivity;

[0006] In the process of adjusting the initial strip steel radiation coefficient, the actual temperature of the strip steel is measured in real time;

[0007] If the target actual temperature measured in real time and the furnace temperature of the soaking furnace section meet the temperature setting conditions, the adjusted strip emissivity coefficient corresponding to the target actual temperature is obtained, and the adjusted strip emissivity coefficient is used as the strip emissivity coefficient of the annealing furnace.

[0008] Preferably, the process of adjusting the initial strip steel emissivity, after measuring the actual temperature of the strip steel in real time, further comprises:

[0009] When the actual temperature of the steel strip at the last moment and the furnace temperature of the soaking furnace section do not meet the temperature setting condition, adjusting the initial steel strip radiation coefficient;

[0010] According to the adjusted initial strip steel emissivity, measuring the current actual temperature of the strip steel;

[0011] Determine whether the actual temperature of the current strip steel and the furnace temperature meet the temperature setting conditions;

[0012] If it is not satisfied, continue to adjust the current strip emissivity coefficient until the adjusted current strip emissivity coefficient and the measured actual temperature of the strip are the target actual temperature.

[0013] Preferably, the adjusting the initial strip steel radiation coefficient comprises:

[0014] Based on the equation Obtaining the adjusted initial strip steel radiation coefficient;

[0015] Wherein, e(t)=y(t)-r(t); e(t) is the difference between the actual temperature of the steel strip and the temperature of the soaking furnace section, y(t) is the actual temperature of the steel strip, and r(t) is the temperature of the soaking furnace section;

[0016] u(t) is the new strip radiation coefficient, kp is the proportional coefficient, TI is the integration time, and Td is the differential time.

[0017] Preferably, the real-time measurement of the actual temperature of the steel strip includes:

[0018] Sending the adjusted initial strip steel emissivity to a pyrometer, wherein the pyrometer is arranged at the strip steel corresponding to the end of the soaking furnace section;

[0019] The actual temperature of the steel strip is measured in real time by the pyrometer.

[0020] Preferably, the process of adjusting the initial strip steel radiation coefficient further includes:

[0021] The furnace temperature of the soaking furnace section is measured by a thermocouple, wherein the thermocouple is arranged at the end of the soaking furnace section.

[0022] Preferably, after using the adjusted steel strip emissivity coefficient as the steel strip emissivity coefficient of the annealing furnace, the method further comprises:

[0023] The strip emissivity of the annealing furnace is sent to the remaining furnace sections of the annealing furnace.

[0024] Based on the same inventive concept, in a second aspect, the present invention further provides a system for obtaining the emissivity of a steel strip in an annealing furnace, which is applied to a soaking furnace section of the annealing furnace, comprising:

[0025] A pyrometer, a thermocouple and a PID controller (Proportion Integration Differentiation controller); the pyrometer and the thermocouple are both connected to the PID controller;

[0026] The pyrometer is used to measure the actual temperature of the steel strip;

[0027] The thermocouple is used to measure the furnace temperature of the soaking furnace section;

[0028] The PID controller is used to obtain the initial strip radiation coefficient in the soaking furnace section of the annealing furnace; in the process of adjusting the initial strip radiation coefficient, the actual temperature of the strip is measured in real time; if the target actual temperature measured in real time and the furnace temperature of the soaking furnace section meet the temperature setting conditions, the adjusted strip radiation coefficient corresponding to the target actual temperature is obtained, and the adjusted strip radiation coefficient is used as the strip radiation coefficient of the annealing furnace.

[0029] Preferably, the PID controller further comprises:

[0030] When the target actual temperature and the furnace temperature of the soaking furnace section do not meet the temperature setting condition, adjusting the initial strip steel radiation coefficient;

[0031] Measuring the actual temperature of the steel strip according to the adjusted initial steel strip emissivity;

[0032] Determining whether the actual temperature of the steel strip and the furnace temperature meet the temperature setting conditions;

[0033] If it is not satisfied, continue to adjust the current strip emissivity coefficient until the adjusted current strip emissivity coefficient and the measured actual temperature of the strip are the target actual temperature.

[0034] Based on the same inventive concept, in a third aspect, the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of a method for obtaining the emissivity of a steel strip in an annealing furnace are implemented.

[0035] Based on the same inventive concept, in a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the method for obtaining the emissivity of the strip steel of the annealing furnace are implemented.

[0036] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0037] 1. In the embodiment of the present application, the pyrometer of the soaking furnace section measures the actual temperature of the strip based on the adjusted strip radiation coefficient, and then determines the target actual temperature by judging whether the actual temperature of the strip and the furnace temperature of the soaking furnace section meet the temperature setting conditions, and then determines the strip radiation coefficient corresponding to the target actual temperature as the strip radiation coefficient of the annealing furnace, thereby ensuring the accuracy of the strip radiation coefficient of the annealing furnace, so that the pyrometer in the annealing furnace can obtain the strip temperature with higher accuracy.

[0038] 2. In the embodiment of the present application, the strip radiation coefficient in the pyrometer is adjusted by the actual temperature of the strip and the temperature of the equalizing furnace section to obtain the adjusted strip radiation coefficient. The method for adjusting the strip radiation coefficient is reliable and practical, which ensures the accuracy of obtaining the new strip radiation coefficient, thereby improving the accuracy of obtaining the strip radiation coefficient of the annealing furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Also, throughout the accompanying drawings, the same reference figures are used to represent the same components. In the drawings:

[0040] Figure 1 A schematic diagram of the structure of a soaking furnace section in an embodiment of the present invention is shown;

[0041] Figure 2 A schematic flow chart showing the steps of a method for obtaining the emissivity of a steel strip in an annealing furnace in an embodiment of the present invention is shown;

[0042] Figure 3 A schematic diagram of modules of a system for obtaining the emissivity of a steel strip in an annealing furnace in an embodiment of the present invention is shown;

[0043] Figure 4 A schematic diagram of the structure of a computer device in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0044] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0045] Embodiment 1

[0046] The first embodiment of the present invention provides a method for obtaining the emissivity of a steel strip in an annealing furnace, which is applied to the annealing furnace. Therefore, the annealing furnace is first introduced in detail.

[0047] Different furnace sections are set in the annealing furnace according to different requirements. Usually, the annealing furnace includes 11 furnace sections. A thermocouple 202 is set at the end of each furnace section, and a pyrometer 201 is set at the corresponding strip steel at the end of each furnace section, wherein the thermocouple 202 is used to detect the temperature of the furnace section, and the pyrometer 201 is used to detect the actual temperature of the strip steel in the furnace section.

[0048] The functions of these 11 furnace sections are different, including preheating furnace section, non-oxidation heating furnace section, radiation tube heating furnace section, soaking furnace section, controlled cooling furnace section, rapid cooling furnace section, etc. The method of this embodiment is based on the soaking furnace section in the annealing furnace as the principle, and the method for obtaining the strip steel radiation coefficient of the annealing furnace clearly explains the specific structure of the soaking furnace section.

[0049] like Figure 2 As shown, Figure 2 It is the specific structure of the soaking furnace section. Figure 2 In the figure, a thermocouple 202 is provided at the end of the soaking furnace section, and a pyrometer 201 is provided at the strip corresponding to the end of the soaking furnace section, wherein the thermocouple 202 is used to detect the furnace temperature of the soaking furnace section, and the pyrometer 201 is used to detect the actual temperature of the strip in the soaking furnace section. A resistance belt 203 is provided at the bottom of the soaking furnace section, and the resistance belt 203 is used to heat the strip. The principle of the soaking furnace section is that in the soaking furnace section under ideal conditions, the furnace temperature of the soaking furnace section and the actual temperature of the strip in the soaking furnace section are consistent.

[0050] The method of this embodiment, such as Figure 1 As shown, including:

[0051] S101, obtaining an initial strip steel emissivity in a soaking furnace section of an annealing furnace;

[0052] S102, in the process of adjusting the initial strip steel radiation coefficient, measuring the actual temperature of the strip steel in real time;

[0053] S103, if the target actual temperature measured in real time and the temperature of the soaking furnace section meet the temperature setting conditions, the adjusted strip emissivity coefficient corresponding to the target actual temperature is obtained, and the adjusted strip emissivity coefficient is used as the strip emissivity coefficient of the annealing furnace.

[0054] It should be explained that under ideal conditions, in the soaking furnace section, the furnace temperature and the target actual temperature of the strip measured in real time are consistent. However, in reality, there is a certain error between the furnace temperature and the target actual temperature of the strip measured in real time. When the difference between the two is not large, it is considered that the furnace temperature and the target actual temperature of the strip are consistent. Therefore, this error is used as the temperature setting condition. The temperature setting condition can be within the range of 0 to 1°C between the furnace temperature and the target actual temperature, or it can be set according to actual needs.

[0055] The method of this embodiment is based on the principle of the soaking furnace section, that is, the furnace temperature of the soaking furnace section and the target actual temperature of the strip meet the temperature setting conditions, based on the adjusted initial strip radiation coefficient, the actual temperature of the strip measured in real time is compared with the furnace temperature of the soaking furnace section, when the target actual temperature and furnace temperature of the strip meet the temperature setting conditions, the adjusted strip radiation coefficient corresponding to the target actual temperature is determined as the strip radiation coefficient of the annealing furnace, and then the annealing furnace continues to measure the real-time temperature of the strip according to the adjusted strip radiation coefficient, thereby improving the accurate detection of the temperature of the strip and ensuring the accuracy of the strip radiation coefficient of the annealing furnace.

[0056] Next, combine Figure 1 The specific implementation steps of the display method provided in this embodiment are described in detail:

[0057] First, step S101 is performed to obtain the initial strip emissivity in the soaking furnace section of the annealing furnace.

[0058] It should be noted that in actual operation, an initial strip radiation coefficient will be set in advance in the pyrometer 201 of the soaking furnace section when the soaking furnace section starts working. The preset initial strip radiation coefficient is used as the basis for the subsequent adjustment of the initial strip radiation coefficient. Usually, this initial strip radiation coefficient is 0.5, and it can also be set according to actual needs.

[0059] Next, step S102 is executed to measure the actual temperature of the steel strip in real time during the process of adjusting the initial steel strip emissivity.

[0060] Specifically, the adjusted initial strip radiation coefficient is sent to the pyrometer 201, wherein the pyrometer 201 is arranged at the strip corresponding to the end of the soaking furnace section; the actual temperature of the strip is measured in real time through the pyrometer 201. It should be emphasized that the strip radiation coefficient is an important parameter for the pyrometer 201 to measure the temperature of the strip, which directly affects the temperature measurement accuracy of the pyrometer 201. Therefore, the pyrometer 201 in the soaking furnace section measures the actual temperature of the strip in the soaking furnace section according to the adjusted initial strip radiation coefficient. In addition, in the process of adjusting the initial strip radiation coefficient, the furnace temperature of the soaking furnace section is measured through the thermocouple 202, wherein the thermocouple 202 is arranged at the end of the soaking furnace section.

[0061] After measuring the actual temperature of the strip in real time, it is necessary to determine whether the actual temperature of the strip and the furnace temperature meet the temperature setting conditions. The judgment process is as follows:

[0062] When the actual temperature of the strip at the previous moment and the furnace temperature of the soaking furnace section do not meet the temperature setting conditions, the initial strip radiation coefficient is adjusted; based on the adjusted initial strip radiation coefficient, the current actual temperature of the strip is measured; it is determined whether the current actual temperature of the strip and the furnace temperature meet the temperature setting conditions; if not, the current strip radiation coefficient is continuously adjusted until the actual temperature of the strip measured after the adjustment is the target actual temperature.

[0063] For example, suppose the actual temperature of the steel strip measured at a certain moment is T1, and the furnace temperature is T2. At this moment, T1 and T2 meet the temperature setting conditions. After a period of time, when T1 and T2 do not meet the temperature setting conditions, the steel strip radiation coefficient S1 corresponding to T1 is adjusted. After S1 is adjusted, the adjusted steel strip radiation coefficient S2 is obtained, and then the current actual temperature of the steel strip T1' is measured based on S2. If T1' and T2 still do not meet the temperature setting conditions, S2 is adjusted until the adjusted current steel strip radiation coefficient, the measured actual temperatures T and T2 of the steel strip meet the temperature setting conditions, and the actual temperature T of the steel strip is used as the target actual temperature.

[0064] The specific process of adjusting the initial strip radiation is as follows:

[0065] The furnace temperature of the soaking furnace section and the actual temperature of the strip measured in real time are used as input and input into the following equation to obtain the adjusted initial strip emissivity.

[0066] Equation e(t) = y(t) - r(t) (1);

[0067] Among them, e(t) is the difference between the actual temperature of the strip and the temperature of the soaking furnace section, y(t) is the actual temperature of the strip, and r(t) is the temperature of the soaking furnace section.

[0068] Based on the equation Obtaining the adjusted initial strip steel radiation coefficient;

[0069] Among them, u(t) is the new strip radiation coefficient, kp is the proportional coefficient, TI is the integration time, and Td is the differential time.

[0070] Based on equations (1) and (2), the law for obtaining the adjusted initial strip radiation coefficient is:

[0071] When the actual temperature of the strip is greater than the temperature of the soaking furnace section, the strip emissivity coefficient corresponding to the actual temperature will decrease, and an adjusted strip emissivity coefficient will be obtained, so that the actual temperature of the strip measured by the pyrometer 201 according to the adjusted strip emissivity coefficient will be reduced.

[0072] When the actual temperature of the strip is lower than the temperature of the soaking furnace section, the strip emissivity coefficient corresponding to the actual temperature will increase, and an adjusted strip emissivity coefficient will be obtained, so that the actual temperature of the strip measured by the pyrometer 201 according to the adjusted strip emissivity coefficient will increase.

[0073] After determining the target actual temperature of the steel strip, execute step S103. If the target actual temperature measured in real time and the furnace temperature of the soaking furnace section meet the temperature setting conditions, obtain the adjusted strip radiation coefficient corresponding to the target actual temperature, and use the adjusted strip radiation coefficient as the strip radiation coefficient of the annealing furnace.

[0074] After the adjusted strip emissivity is used as the strip emissivity of the annealing furnace, that is, after the strip emissivity of the annealing furnace is determined, the strip emissivity of the annealing furnace is sent to the remaining furnace sections of the annealing furnace. The pyrometers 201 in the remaining furnace sections work accurately according to the determined strip emissivity of the annealing furnace.

[0075] Taking the pyrometer A and the thermocouple B in the soaking furnace section as an example, the method of this embodiment is clearly and detailedly explained.

[0076] When the soaking furnace section starts working, it will produce a steady heat to heat the strip. The temperature of the soaking furnace section is measured by thermocouple B as T B After the strip is heated in the soaking furnace, the pyrometer A measures the actual temperature of the strip as T according to the initial strip radiation coefficient R. A Then, determine T A and T B Whether the temperature setting conditions are met.

[0077] When T A and T B When the temperature setting conditions are met, the initial strip emissivity R is used as the strip emissivity of the annealing furnace, and this initial strip emissivity R is sent to the remaining furnace sections in the annealing furnace so that the pyrometers of the remaining furnace sections work according to R.

[0078] When T A and T B When the temperature setting conditions are not met, T A and T B Substituting into equations (1) and (2), we can obtain the adjusted initial strip emissivity R'. Based on R', the pyrometer A measures the actual temperature of the strip in the soaking furnace as T A '. Then, continue to judge TA ' and T B Whether the temperature setting conditions are met. A ' and T B When the temperature setting conditions are met, R' is used as the strip emissivity of the annealing furnace, and R' is sent to the remaining furnace sections in the annealing furnace so that the pyrometers of the remaining furnace sections work according to R.

[0079] When T A ' and T B When the temperature setting conditions are not met, T A ' and T B Substitute into equations (1) and (2) to obtain the adjusted strip radiation coefficient R”. A continues to measure the actual temperature of the strip in the soaking furnace based on R” as T A Then, continue to judge T A ” and T B Are they the same?

[0080] Until the actual temperature of the strip measured by A based on the current strip emissivity and the furnace temperature of the soaking furnace section meet the temperature setting conditions, the current strip emissivity is determined to be the strip emissivity of the annealing furnace.

[0081] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0082] 1. In the present embodiment, the pyrometer of the soaking furnace section measures the actual temperature of the steel strip based on the adjusted strip emissivity coefficient, and then determines the target actual temperature by judging whether the actual temperature of the steel strip and the furnace temperature of the soaking furnace section meet the temperature setting conditions, and then determines the strip emissivity coefficient corresponding to the target actual temperature as the strip emissivity coefficient of the annealing furnace, thereby ensuring the accuracy of the strip emissivity coefficient of the annealing furnace, so that the pyrometer in the annealing furnace can obtain the strip temperature with higher accuracy.

[0083] 2. In this embodiment, the strip radiation coefficient in the pyrometer is adjusted by the actual temperature of the strip and the temperature of the equalizing furnace section to obtain the adjusted strip radiation coefficient. The method for adjusting the strip radiation coefficient is reliable and practical, which ensures the accuracy of obtaining the new strip radiation coefficient, thereby improving the accuracy of obtaining the strip radiation coefficient of the annealing furnace.

[0084] Embodiment 2

[0085] Based on the same inventive concept, the second embodiment of the present invention also provides a system for obtaining the emissivity of a steel strip in an annealing furnace, which is applied to the soaking furnace section of the annealing furnace, such as Figure 3 As shown, including:

[0086] A pyrometer 201, a thermocouple 202 and a PID controller (Proportion Integration Differentiation controller) 204; the pyrometer 201 and the thermocouple 202 are both connected to the PID controller 204;

[0087] The pyrometer 201 is used to measure the actual temperature of the steel strip;

[0088] The thermocouple 202 is used to measure the temperature of the soaking furnace section;

[0089] The PID controller 204 is used to obtain the initial strip radiation coefficient in the soaking furnace section of the annealing furnace; in the process of adjusting the initial strip radiation coefficient, the actual temperature of the strip is measured in real time; if the target actual temperature measured in real time and the furnace temperature of the soaking furnace section meet the temperature setting conditions, the adjusted strip radiation coefficient corresponding to the target actual temperature is obtained, and the adjusted strip radiation coefficient is used as the strip radiation coefficient of the annealing furnace.

[0090] As an optional embodiment, the PID controller 204 further includes:

[0091] When the target actual temperature and the furnace temperature of the soaking furnace section do not meet the temperature setting condition, adjusting the initial strip steel radiation coefficient;

[0092] Measuring the actual temperature of the steel strip according to the adjusted initial steel strip emissivity;

[0093] Determining whether the actual temperature of the steel strip and the furnace temperature meet the temperature setting conditions;

[0094] If it is not satisfied, continue to adjust the current strip emissivity coefficient until the adjusted current strip emissivity coefficient and the measured actual temperature of the strip are the target actual temperature.

[0095] As an optional embodiment, the adjusting the initial strip steel radiation coefficient includes:

[0096] Based on the equation Obtaining the adjusted initial strip steel radiation coefficient;

[0097] Wherein, e(t)=y(t)-r(t); e(t) is the difference between the actual temperature of the steel strip and the temperature of the soaking furnace section, y(t) is the actual temperature of the steel strip, and r(t) is the temperature of the soaking furnace section;

[0098] u(t) is the new strip radiation coefficient, kp is the proportional coefficient, TI is the integration time, and Td is the differential time.

[0099] As an optional embodiment, the PID controller 204 is also used to send the adjusted initial strip emissivity coefficient to the pyrometer 201, wherein the pyrometer 201 is arranged at the strip corresponding to the end of the soaking furnace section; then, the pyrometer 201 measures the actual temperature of the strip in real time.

[0100] As an optional embodiment, the thermocouple 202 is used to measure the furnace temperature of the soaking furnace section, wherein the thermocouple 202 is arranged at the end of the soaking furnace section.

[0101] As an optional embodiment, the PID controller 204 is further configured to send the strip emissivity coefficient of the annealing furnace to other furnace sections of the annealing furnace after taking the adjusted strip emissivity coefficient as the strip emissivity coefficient of the annealing furnace.

[0102] Since the system for obtaining the radiation coefficient of the strip steel of the annealing furnace introduced in this embodiment is the system adopted by the method for obtaining the radiation coefficient of the strip steel of the annealing furnace in the first embodiment of the present application, based on the method for obtaining the radiation coefficient of the strip steel of the annealing furnace introduced in the first embodiment of the present application, the technical personnel in the field can understand the specific implementation mode and various variations of the system for obtaining the radiation coefficient of the strip steel of the annealing furnace in this embodiment, so how the system for obtaining the radiation coefficient of the strip steel of the annealing furnace implements the method in the first embodiment of the present application will not be described in detail here. As long as the system adopted by the technical personnel in the field to implement the method for obtaining the radiation coefficient of the strip steel of the annealing furnace in the first embodiment of the present application, it belongs to the scope of protection of the present application.

[0103] Embodiment 3

[0104] Based on the same inventive concept, the third embodiment of the present invention further provides a computer device, such as Figure 4 As shown, it includes a memory 404, a processor 402, and a computer program stored in the memory 404 and executable on the processor 402. When the processor 402 executes the program, the steps of any one of the above methods for obtaining the emissivity of the strip steel of the annealing furnace are implemented.

[0105] Among them, Figure 3In the embodiment of the present invention, a bus architecture (represented by bus 400) is shown, which may include any number of interconnected buses and bridges, and bus 400 links various circuits including one or more processors represented by processor 402 and memory represented by memory 404. Bus 400 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 406 provides an interface between bus 400 and receiver 401 and transmitter 403. Receiver 401 and transmitter 403 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 402 is responsible for managing bus 400 and general processing, while memory 404 may be used to store data used by processor 402 when performing operations.

[0106] Embodiment 4

[0107] Based on the same inventive concept, the fourth embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any method of obtaining the emissivity of the strip steel of the annealing furnace described in the first embodiment above.

[0108] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0109] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0110] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0111] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0112] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0113] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these 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 these modifications and variations.

Claims

1. A method for obtaining the emissivity of a steel strip in an annealing furnace, applied to an annealing furnace, It is characterized in that include: In the soaking furnace section of the annealing furnace, obtaining the initial strip emissivity; In the process of adjusting the initial strip steel radiation coefficient, the actual temperature of the strip steel is measured in real time; If the target actual temperature measured in real time and the furnace temperature of the soaking furnace section meet the temperature setting condition, then the adjusted strip steel radiation coefficient corresponding to the target actual temperature is obtained, and the adjusted strip steel radiation coefficient is used as the strip steel radiation coefficient of the annealing furnace; The process of adjusting the initial steel strip radiation coefficient, after measuring the actual temperature of the steel strip in real time, further includes: when the actual temperature of the steel strip at the previous moment and the furnace temperature of the soaking furnace section do not meet the temperature setting condition, adjusting the initial steel strip radiation coefficient; measuring the current actual temperature of the steel strip according to the adjusted initial steel strip radiation coefficient; judging whether the current actual temperature of the steel strip and the furnace temperature meet the temperature setting condition; if not, continuing to adjust the current steel strip radiation coefficient until the actual temperature of the steel strip measured after the adjustment of the current steel strip radiation coefficient is the target actual temperature; The adjusting the initial strip radiation coefficient comprises: based on the equation Obtain the adjusted initial strip radiation coefficient; wherein, e(t)=y(t)-r(t); e(t) is the difference between the actual temperature of the strip and the temperature of the soaking furnace section, y(t) is the actual temperature of the strip, r(t) is the temperature of the soaking furnace section; u(t) is the new strip radiation coefficient, kp is the proportional coefficient, TI is the integration time, and Td is the differential time; The real-time measurement of the actual temperature of the steel strip includes: sending the adjusted initial steel strip emissivity to a pyrometer, wherein the pyrometer is arranged at the steel strip corresponding to the end of the soaking furnace section; and measuring the actual temperature of the steel strip in real time through the pyrometer.

2. The method according to claim 1, It is characterized in that The process of adjusting the initial strip steel radiation coefficient also includes: The furnace temperature of the soaking furnace section is measured by a thermocouple, wherein the thermocouple is arranged at the end of the soaking furnace section.

3. The method according to claim 1, It is characterized in that After the adjusted steel strip emissivity is used as the steel strip emissivity of the annealing furnace, the method further includes: The strip emissivity of the annealing furnace is sent to the remaining furnace sections of the annealing furnace.

4. A system for obtaining the emissivity of a steel strip in an annealing furnace, which is applied to the soaking furnace section of the annealing furnace. It is characterized in that include: A pyrometer, a thermocouple and a PID controller (Proportion Integration Differentiation controller); the pyrometer and the thermocouple are both connected to the PID controller; The pyrometer is used to measure the actual temperature of the steel strip; The thermocouple is used to measure the furnace temperature of the soaking furnace section; The PID controller is used to obtain the initial strip emissivity in the soaking furnace section of the annealing furnace; and to measure the actual temperature of the strip in real time during the adjustment of the initial strip emissivity; If the target actual temperature measured in real time and the furnace temperature of the soaking furnace section meet the temperature setting condition, then the adjusted strip steel radiation coefficient corresponding to the target actual temperature is obtained, and the adjusted strip steel radiation coefficient is used as the strip steel radiation coefficient of the annealing furnace; The PID controller further includes: when the target actual temperature and the furnace temperature of the soaking furnace section do not meet the temperature setting condition, adjusting the initial strip steel radiation coefficient; measuring the actual temperature of the strip steel according to the adjusted initial strip steel radiation coefficient; judging whether the actual temperature of the strip steel and the furnace temperature meet the temperature setting condition; if not, continuing to adjust the current strip steel radiation coefficient until the adjusted current strip steel radiation coefficient and the measured actual temperature of the strip steel are the target actual temperature; The adjusting the initial strip radiation coefficient comprises: based on the equation Obtain the adjusted initial strip radiation coefficient; wherein, e(t)=y(t)-r(t); e(t) is the difference between the actual temperature of the strip and the temperature of the soaking furnace section, y(t) is the actual temperature of the strip, r(t) is the temperature of the soaking furnace section; u(t) is the new strip radiation coefficient, kp is the proportional coefficient, TI is the integration time, and Td is the differential time; The real-time measurement of the actual temperature of the steel strip includes: sending the adjusted initial steel strip emissivity to a pyrometer, wherein the pyrometer is arranged at the steel strip corresponding to the end of the soaking furnace section; and measuring the actual temperature of the steel strip in real time through the pyrometer.

5. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, It is characterized in that When the processor executes the program, the method steps according to any one of claims 1 to 3 are implemented.

6. A computer-readable storage medium having a computer program stored thereon, It is characterized in that When the program is executed by a processor, the method steps described in any one of claims 1 to 3 are implemented.

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