Temperature control method and system for oxidation furnace

Abstract

The embodiment of the invention provides an oxidation furnace temperature control method and system, and the method comprises the steps: adjusting a furnace temperature PID controller to be in an automatic mode when a temperature change instruction of an oxidation furnace is detected, enabling the PID controller to obtain a current furnace temperature and a target furnace temperature corresponding to the temperature change instruction, comparing the current furnace temperature with the target furnace temperature, and controlling the temperature of the oxidation furnace according to the comparison result. Adjusting the output power of the power regulator based on the furnace temperature difference; when it is detected that the target furnace temperature is larger than the current furnace temperature and the output power of the power regulator is larger than a preset upper limit value, the power regulator is turned off, a transformer upshift instruction is sent out for the transformer to be lifted by a first gear for output, the PID controller is reactivated, and the output power of the power regulator is regulated based on the furnace temperature difference; and when it is detected that the target furnace temperature is smaller than the current furnace temperature and the output power of the power regulator is smaller than a preset lower limit value, the power regulator is turned off, a transformer downshift instruction is sent out for the transformer to reduce one-gear output, the PID controller is reactivated, and the output power of the power regulator is regulated based on the furnace temperature difference.

Description

Technical Field

[0001] The present invention relates to the technical field of oxidation furnace temperature control, and in particular to an oxidation furnace temperature control method and system. Background Art

[0002] The pre-oxidation furnace is the key equipment in the oxidation section. The hot air circulation furnace uses hot air circulation to carry out pre-oxidation treatment, including heating system, circulating air system, exhaust system, and wire guide system. The heating system is mainly composed of a fan and a heater. The function of the fan is to provide air circulation in the furnace, and the function of the heater is to provide a heat source. The function of the circulating air system is to keep the circulating hot air evenly distributed and form a uniform isothermal zone in the furnace; the circulating air flows from top to bottom in the furnace, perpendicular to the running direction of the tow.

[0003] There are usually two traditional methods for controlling the temperature of oxidation furnaces. One is to use multiple industrial frequency electric heaters to control the temperature of the oxidation furnace, but this may result in low temperature control accuracy and energy waste. The other is to use multiple low-power power regulators or a single high-power power regulator to control the temperature of the oxidation furnace, but this may introduce harmonics and cause grid harmonic pollution problems, which is labor-intensive to maintain and difficult to debug and put into operation. Summary of the invention

[0004] In view of the problems existing in the prior art, an embodiment of the present invention provides an oxidation furnace temperature control method and system.

[0005] The embodiment of the present invention provides an oxidation furnace temperature control method, comprising: a heater, a transformer, a power regulator, and a PID controller; When a temperature change instruction of the oxidation furnace is detected, the furnace temperature PID controller is adjusted to an automatic mode, so that the PID controller obtains the current furnace temperature and the target furnace temperature corresponding to the temperature change instruction, compares the current furnace temperature with the target furnace temperature, and adjusts the output power of the power regulator based on the furnace temperature difference; When it is detected that the target furnace temperature is greater than the current furnace temperature and the output power of the power regulator is greater than a preset upper limit value, the power regulator is turned off, a transformer upshift instruction is issued, so that the transformer increases the output by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference; When it is detected that the target furnace temperature is lower than the current furnace temperature and the output power of the power regulator is lower than the preset lower limit, the power regulator is turned off, a transformer downshift instruction is issued to reduce the output of the transformer by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference.

[0006] In one embodiment, the method further comprises: When the transformer increases the output by one gear, the initial MV setting of the PID is adjusted, and the adjustment basis of the initial MV setting is the current gear power of the transformer and the higher gear power; When the transformer output is reduced by one gear, the initial MV setting of the PID is adjusted, and the adjustment basis of the initial MV setting is the current gear power of the transformer and the lower gear power.

[0007] In one embodiment, the method further comprises: The preset upper limit value is 90% of the full power value of the transformer at the current gear, and the preset lower limit value is 10% of the full power value of the transformer at the current gear.

[0008] In one embodiment, the method further comprises: The preset upper limit is the transformer's higher power minus the transformer's current power; The preset lower limit value is the current power of the transformer minus one level lower power of the transformer.

[0009] In one embodiment, the method further comprises: When a shift command of the transformer is detected, the command time of the last shift command is obtained to determine the time difference between the two shifts; Detect whether the time difference between two gear shifts is greater than a preset time length. When the time difference between the two gear shifts is less than the preset time length, stop executing the gear shift command of the transformer.

[0010] The embodiment of the present invention provides an oxidation furnace temperature control system, including: a heater, a transformer, a power regulator, and a PID controller; a detection module, configured to adjust the furnace temperature PID controller to an automatic mode when a temperature change instruction of the oxidation furnace is detected, so that the PID controller obtains a current furnace temperature and a target furnace temperature corresponding to the temperature change instruction, compares the current furnace temperature with the target furnace temperature, and adjusts the output power of the power regulator based on the furnace temperature difference; A gear-up module is used to detect that the target furnace temperature is greater than the current furnace temperature and the output power of the power regulator is greater than a preset upper limit value, turn off the power regulator, issue a transformer gear-up instruction, so that the transformer can increase the output by one gear, and reactivate the PID controller to adjust the output power of the power regulator based on the furnace temperature difference; The downshift module is used to detect that the target furnace temperature is lower than the current furnace temperature and the output power of the power regulator is lower than a preset lower limit value, shut down the power regulator, issue a transformer downshift instruction, so that the transformer can reduce the output by one gear, and reactivate the PID controller to adjust the output power of the power regulator based on the furnace temperature difference.

[0011] In one embodiment, the system further comprises: A first adjustment module, configured to adjust the initial MV setting of the PID when the transformer increases the output by one gear, wherein the adjustment basis of the initial MV setting is the current gear power of the transformer and the higher gear power; The second adjustment module is used to adjust the initial MV setting of the PID when the transformer reduces the output by one gear, and the adjustment basis of the initial MV setting is the current gear power of the transformer and the lower gear power.

[0012] In one embodiment, the system further comprises: A judgment module is used to obtain the instruction time of the last gear shift instruction when a gear shift instruction of the transformer is detected, and to judge the time difference between the two gear shifts; The stop module is used to detect whether the time difference between two gear shifts is greater than a preset time length. When the time difference between the two gear shifts is less than the preset time length, the execution of the transformer's gear shift instruction is stopped.

[0013] An embodiment of the present invention provides an electronic device, including a processor and a memory; The processor is connected to the memory; The memory is used to store executable program code; The processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to execute the method described in one or more embodiments.

[0014] An embodiment of the present invention provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned oxidation furnace temperature control method are implemented.

[0015] In view of the above, in one or more embodiments of the present specification, when the temperature change instruction of the oxidation furnace is detected, the furnace temperature PID controller is adjusted to the automatic mode, so that the PID controller obtains the target furnace temperature corresponding to the current furnace temperature and the temperature change instruction, compares the current furnace temperature with the target furnace temperature, and adjusts the output power of the power regulator based on the furnace temperature difference; when it is detected that the target furnace temperature is greater than the current furnace temperature, and the output power of the power regulator is greater than the preset upper limit value, the power regulator is turned off, a transformer upshift instruction is issued, and the transformer increases the output by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference; when it is detected that the target furnace temperature is less than the current furnace temperature, and the output power of the power regulator is less than the preset lower limit value, the power regulator is turned off, a transformer downshift instruction is issued, and the transformer reduces the output by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference. In this way, the variable power of the power regulator and the fixed power of the transformer are combined. In this way, the unified operation of fixed power and variable power can be realized, making the temperature control of the heating furnace more flexible and convenient, and the transformer jump operation is solidified by the program, which is more efficient and safer than manual shifting, while saving equipment investment and reducing harmonic pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a flow chart of an oxidation furnace temperature control method provided in one embodiment of this specification.

[0018] Figure 2 It is a structural diagram of an oxidation furnace temperature control system provided in one embodiment of this specification.

[0019] Figure 3 It is a structural schematic diagram of an oxidation furnace temperature control system provided in another embodiment of the present specification.

[0020] Figure 4 It is a structural schematic diagram of an electronic device provided by an embodiment of this specification. DETAILED DESCRIPTION

[0021] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and is not a limitation of the scope of protection, applicability or examples set forth in the claims. The functions and arrangements of the elements discussed can be changed without departing from the scope of protection of the contents of this specification. Various examples can omit, replace or add various processes or components as needed. For example, the described method can be performed in an order different from the described order, and various steps can be added, omitted or combined. In addition, the features described relative to some examples can also be combined in other examples.

[0022] As used herein, the term "including" and its variations represent open terms, meaning "including but not limited to". The term "based on" means "based at least in part on". The terms "one embodiment" and "an embodiment" mean "at least one embodiment". The term "another embodiment" means "at least one other embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other definitions may be included below, whether explicit or implicit. Unless the context clearly indicates otherwise, the definition of a term is consistent throughout the specification.

[0023] like Figure 1 As shown, an embodiment of the present invention provides an oxidation furnace temperature control method, comprising: Step S101, when a temperature change instruction of the oxidation furnace is detected, the furnace temperature PID controller is adjusted to an automatic mode, so that the PID controller obtains the current furnace temperature and the target furnace temperature corresponding to the temperature change instruction, compares the current furnace temperature with the target furnace temperature, and adjusts the output power of the power regulator based on the furnace temperature difference.

[0024] Specifically, when the temperature of the oxidation furnace needs to be adjusted, the heating element, such as the current and voltage of the electric heater, is adjusted to control the circulating hot air of the oxidation furnace to achieve a uniform temperature field in the furnace and a reasonable temperature gradient distribution. Among them, the control of the heating element (heater) can be controlled by transformer gear adjustment, which means changing the voltage ratio on the primary or secondary side of the transformer, thereby changing the output voltage and current of the transformer, thereby affecting the output power. According to Ohm's law, the relationship between the voltage, current, resistance and power of a resistive load is: From the above formula, we can see that when the resistance value is fixed, the output power can be controlled by changing the voltage, and the output power is proportional to the square of the voltage.

[0025] In addition to the transformer, the power regulator is located between the power supply and the heater, which can adjust the current flowing into the heater, and then adjust the power of the heater. When the heater temperature needs to be lowered, the power regulator reduces the current, thereby reducing the power output of the heater and lowering the heater temperature. When the heater temperature needs to be raised, the power regulator increases the current value, thereby increasing the power output of the heater and raising the heater temperature.

[0026] However, transformers and power regulators have their own advantages and disadvantages in controlling power. Transformers control power output, which is simple and reliable, without harmonic pollution, but there is a voltage difference between gears, which cannot be adjusted continuously, and the output voltage will fluctuate during gear shifting. Power regulators have high output control accuracy and more stable regulation, but they will generate harmonic interference. And the greater the power, the greater the harmonic pollution.

[0027] Therefore, in order to give full play to the advantages of both solutions and avoid disadvantages, the oxidation furnace temperature control method in this embodiment includes a heater, a transformer, a power regulator, a PID (proportional integral differential control) controller, and is applied as follows Figure 2 The oxidation furnace temperature control system shown. When the temperature change command of the oxygen furnace is detected, such as receiving the control command of the temperature change, the furnace temperature PID loop is automatically put into operation to control the output of the power regulator. When the furnace temperature needs to be increased or decreased, the furnace temperature PID controller is first set to automatic mode. The PID loop automatically adjusts the output power of the power regulator according to the difference between the current furnace temperature and the set target temperature to gradually increase or decrease the furnace temperature. Among them, PID control mainly includes proportional control, integral control, and differential control. The specific calculation formula can be: Among them, t is the current time point, τ is the time integral variable, u(t) is the control signal, 𝑒(𝑡) is the current error, 𝐾 𝑝 , 𝐾 𝑖 , 𝐾 d are the proportional, integral, and differential gains or time constants, respectively. is the integral of the error e over time τ, is the differential of the error e with respect to time t.

[0028] Step S102, when it is detected that the target furnace temperature is greater than the current furnace temperature and the output power of the power regulator is greater than a preset upper limit value, the power regulator is turned off, a transformer upshift instruction is issued, so that the transformer increases the output by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference.

[0029] Specifically, when the target furnace temperature is greater than the current furnace temperature, it means that the temperature change instruction is a temperature increase instruction, then it is determined whether the output power of the power regulator is greater than the preset upper limit value, that is, whether the transformer needs to be upgraded, wherein the preset upper limit value can be 90% of the full value of the transformer's current gear power, or the transformer's higher power minus the transformer's current power. The two preset upper limits are specifically described, wherein 90% of the full value of the current gear power means that the output power of the power regulator is greater than 90% of the maximum power of the transformer's current gear, that is, the power regulator is close to its output limit under the current voltage configuration. In order to further increase the output power without overloading the power regulator, the system will trigger the transformer to upgrade to increase the power supply voltage level, thereby providing the power regulator with a larger power adjustment space; and the transformer's higher power minus the transformer's current power refers to the mathematical logic of the upgrade, that is, when the required power increase (that is, the power regulator output power) is exactly equal to the additional power that the transformer can provide after upgrading one gear, it is triggered. Upgrading is a process of comparing the required power increment with the power difference that can be provided after the upgrading. It is a consideration based on the matching of actual power demand and supply capacity, so as to determine whether to upgrade the transformer. The specific process of upgrading may include: closing the power regulator, issuing a transformer upgrading command, and providing the transformer with an output of one gear. After the transformer upgrading is completed and stabilized, the PID loop is activated again, and the output power of the power regulator is set back to a suitable preset value. The furnace temperature is continued to be accurately adjusted in the PID control mode to ensure that the furnace temperature rises steadily to the target value. After the upgrading is completed, the PID loop is reactivated, and its initial output MV (Manipulated Variable) should be set based on the new voltage gear. Considering the power increase potential brought by the upgrading, the initial MV setting should ensure that it will not cause an excessive power jump immediately. The output percentage of the power regulator before the upgrading can be compared with the power of the higher gear, such as taking the median value between the maximum power of the current gear and the power of the higher gear.

[0030] Step S103, when it is detected that the target furnace temperature is lower than the current furnace temperature and the output power of the power regulator is lower than a preset lower limit, the power regulator is turned off, a transformer downshift instruction is issued, so that the transformer reduces the output by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference.

[0031] Specifically, when the target furnace temperature is lower than the current furnace temperature, it means that the temperature change instruction is a cooling instruction. Then, it is determined whether the output power of the power regulator is lower than the preset lower limit value, that is, whether the transformer needs to be downgraded. The preset lower limit value can be 10% of the full power value of the transformer's current gear, or the current power of the transformer reduced by one gear. The two preset lower limits are specifically described. Among them, 10% of the full power value of the current gear means that the output power of the power regulator is less than 10% of the maximum power of the transformer's current gear, that is, the power regulator is close to its output lower limit under the current voltage configuration. In order to further reduce the output power, the system will trigger the transformer to downgrade to reduce the power supply voltage level, thereby providing the power regulator with a larger power adjustment space; and reducing the current power of the transformer by one gear refers to the mathematical logic of downgrading, that is, when the required power reduction (that is, the output power of the power regulator) is exactly equal to the additional power that can be reduced after the transformer is downgraded by one gear, the downgrade is triggered. The difference between the required power reduction and the power available after downshifting is a consideration based on the matching of actual power demand and supply capacity, thereby determining to downshift the transformer. The specific process of downshifting may include: turning off the power regulator, issuing a transformer downshift command, allowing the transformer to reduce the output by one gear, and after the transformer downshift is completed and stabilized, activating the PID loop again, setting the output power of the power regulator back to a suitable preset value, and continuing to accurately adjust the furnace temperature in PID control mode to ensure that the furnace temperature is stably reduced to the target value. After the downshift is completed, the PID loop is reactivated, and its initial output MV (Manipulated Variable) should be set based on the new voltage gear. Considering the power reduction potential brought by downshifting, the initial MV setting should ensure that it does not immediately cause an excessive power jump. It can be set by comparing the output percentage of the power regulator before upshifting with the power of the lower gear, such as taking the median value between the maximum power of the current gear and the power of the lower gear.

[0032] In addition, when long-term continuous heating is required, frequent gear shifting of the transformer may cause the heater system to malfunction or power outage, increasing safety hazards. In order to solve the above problems, the program sets the minimum gear shift interval time and the delay time setting for gear shift condition judgment. When the gear shift command of the transformer is detected, the command time of the last gear shift command is obtained, the time difference between the two gear shifts is judged, and whether the time difference between the two gear shifts is greater than the preset time length is detected. When the time difference between the two gear shifts is less than the preset time length, the gear shift command of the transformer is stopped and the gear shift is delayed, that is, until the time difference between the two gear shifts is greater than the preset time length, the gear shift is delayed.

[0033] An oxidation furnace temperature control method provided by an embodiment of the present invention, when a temperature change instruction of an oxidation furnace is detected, a furnace temperature PID controller is adjusted to an automatic mode, so that the PID controller obtains the target furnace temperature corresponding to the current furnace temperature and the temperature change instruction, compares the current furnace temperature with the target furnace temperature, and adjusts the output power of the power regulator based on the furnace temperature difference; when it is detected that the target furnace temperature is greater than the current furnace temperature, and the output power of the power regulator is greater than the preset upper limit value, the power regulator is turned off, a transformer upshift instruction is issued, so that the transformer increases the output by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference; when it is detected that the target furnace temperature is less than the current furnace temperature, and the output power of the power regulator is less than the preset lower limit value, the power regulator is turned off, a transformer downshift instruction is issued, so that the transformer reduces the output by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference. In this way, the variable power of the power regulator and the fixed power of the transformer are combined. In this way, the unified operation of fixed power and variable power can be realized, so that the temperature control of the heating furnace is more flexible and convenient, and the transformer jump operation is solidified by a program, which is more efficient and safer than manual shifting, while saving equipment investment and reducing harmonic pollution.

[0034] See also Figure 3 , Figure 3 Schematic diagram of a temperature control system for an oxidation furnace provided in an embodiment of the present application. Figure 3 As shown, the system includes: a heater, a transformer, a power regulator, and a PID controller; The detection module S201 is used to adjust the furnace temperature PID controller to an automatic mode when a temperature change instruction of the oxidation furnace is detected, so that the PID controller obtains the current furnace temperature and the target furnace temperature corresponding to the temperature change instruction, compares the current furnace temperature with the target furnace temperature, and adjusts the output power of the power regulator based on the furnace temperature difference; The gear-up module S202 is used to detect that the target furnace temperature is greater than the current furnace temperature and the output power of the power regulator is greater than a preset upper limit value, turn off the power regulator, issue a transformer gear-up instruction, so that the transformer increases the output by one gear, and reactivate the PID controller to adjust the output power of the power regulator based on the furnace temperature difference; The downshift module S203 is used to detect that the target furnace temperature is lower than the current furnace temperature and the output power of the power regulator is lower than a preset lower limit value, shut down the power regulator, issue a transformer downshift instruction, so that the transformer can reduce the output by one gear, and reactivate the PID controller to adjust the output power of the power regulator based on the furnace temperature difference.

[0035] In one embodiment, the system further comprises: A first adjustment module, configured to adjust the initial MV setting of the PID when the transformer increases the output by one gear, wherein the adjustment basis of the initial MV setting is the current gear power of the transformer and the higher gear power; The second adjustment module is used to adjust the initial MV setting of the PID when the transformer reduces the output by one gear, and the adjustment basis of the initial MV setting is the current gear power of the transformer and the lower gear power.

[0036] In one embodiment, the system further comprises: In one embodiment, the system further comprises: A judgment module is used to obtain the instruction time of the last gear shift instruction when a gear shift instruction of the transformer is detected, and to judge the time difference between the two gear shifts; The stop module is used to detect whether the time difference between two gear shifts is greater than a preset time length. When the time difference between the two gear shifts is less than the preset time length, the execution of the transformer's gear shift instruction is stopped.

[0037] Those skilled in the art can clearly understand that the technical solutions of the embodiments of the present application can be implemented with the help of software and / or hardware. The "unit" and "module" in this specification refer to software and / or hardware that can independently complete or cooperate with other components to complete specific functions, where the hardware can be, for example, a field programmable gate array (FPGA), an integrated circuit (IC), etc.

[0038] Each processing unit and / or module of the embodiments of the present application may be implemented by an analog circuit that implements the functions described in the embodiments of the present application, or may be implemented by software that executes the functions described in the embodiments of the present application.

[0039] See also Figure 4 , which shows a schematic diagram of the structure of an electronic device involved in an embodiment of the present application, the electronic device can be used to implement Figure 1 The method in the embodiment shown. Figure 4 As shown, the electronic device 300 may include: at least one processor 301 , at least one network interface 304 , a user interface 303 , a memory 305 , and at least one communication bus 302 .

[0040] The communication bus 302 is used to realize the connection and communication between these components.

[0041] The user interface 303 may include a display screen (Display) and a camera (Camera). Optionally, the user interface 303 may also include a standard wired interface and a wireless interface.

[0042] The network interface 304 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

[0043] Among them, the processor 301 may include one or more processing cores. The processor 301 uses various interfaces and lines to connect various parts of the entire electronic device 300, and executes various functions and processes data of the terminal 300 by running or executing instructions, programs, code sets or instruction sets stored in the memory 305, and calling data stored in the memory 305. Optionally, the processor 301 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (ProgrammableLogic Array, PLA). The processor 301 can integrate one or a combination of a processor (Central Processing Unit, CPU), a graphics processor (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 301, and it can be implemented separately through a chip.

[0044] Among them, the memory 305 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read-Only Memory). Optionally, the memory 305 includes a non-transitory computer-readable storage medium. The memory 305 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 305 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 305 may optionally be at least one storage device located away from the aforementioned processor 301. As Figure 4 As shown, the memory 305 as a computer storage medium may include an operating system, a network communication module, a user interface module, and program instructions.

[0045] exist Figure 4 In the electronic device 300 shown, the user interface 303 is mainly used to provide an input interface for the user and obtain the data input by the user; and the processor 301 can be used to call the interactive application based on image generation stored in the memory 305, and specifically perform the following operations: when a temperature change instruction of the oxidation furnace is detected, the furnace temperature PID controller is adjusted to the automatic mode, so that the PID controller obtains the current furnace temperature and the target furnace temperature corresponding to the temperature change instruction, compares the current furnace temperature with the target furnace temperature, and adjusts the output power of the power regulator based on the furnace temperature difference; when it is detected that the target furnace temperature is greater than the current furnace temperature, and the output power of the power regulator is greater than the preset upper limit value, the power regulator is turned off, a transformer upshift instruction is issued, so that the transformer increases the output by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference; when it is detected that the target furnace temperature is less than the current furnace temperature, and the output power of the power regulator is less than the preset lower limit value, the power regulator is turned off, a transformer downshift instruction is issued, so that the transformer reduces the output by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference.

[0046] The present application also 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 above method are implemented. The computer-readable storage medium may include, but is not limited to, any type of disk, including a floppy disk, an optical disk, a DVD, a CD-ROM, a micro drive, and a magneto-optical disk, a ROM, a RAM, an EPROM, an EEPROM, a DRAM, a VRAM, a flash memory device, a magnetic card or an optical card, a nanosystem (including a molecular memory IC), or any type of medium or device suitable for storing instructions and / or data.

[0047] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0048] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0049] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0050] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0051] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0052] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

[0053] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by entering a program to instruct related hardware. The program may be stored in a computer-readable memory, and the memory may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0054] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Claims

1. A method for controlling the temperature of an oxidation furnace, characterized in that: Applied to oxidation furnace temperature control system, including: heater, transformer, power regulator, PID controller; When a temperature change instruction of the oxidation furnace is detected, the furnace temperature PID controller is adjusted to an automatic mode, so that the PID controller obtains the current furnace temperature and the target furnace temperature corresponding to the temperature change instruction, compares the current furnace temperature with the target furnace temperature, and adjusts the output power of the power regulator based on the furnace temperature difference; When it is detected that the target furnace temperature is greater than the current furnace temperature and the output power of the power regulator is greater than a preset upper limit value, the power regulator is turned off, a transformer upshift instruction is issued, so that the transformer increases the output by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference; When it is detected that the target furnace temperature is lower than the current furnace temperature and the output power of the power regulator is lower than the preset lower limit, the power regulator is turned off, a transformer downshift instruction is issued to reduce the output of the transformer by one gear, and the PID controller is reactivated to adjust the output power of the power regulator based on the furnace temperature difference.

2. The oxidation furnace temperature control method according to claim 1, characterized in that: The method further comprises When the transformer increases the output by one gear, the initial MV setting of the PID is adjusted, and the adjustment basis of the initial MV setting is the current gear power of the transformer and the higher gear power; When the transformer output is reduced by one gear, the initial MV setting of the PID is adjusted, and the adjustment basis of the initial MV setting is the current gear power of the transformer and the lower gear power.

3. The oxidation furnace temperature control method according to claim 1, characterized in that: The method further comprises: The preset upper limit value is 90% of the full power value of the transformer at the current gear, and the preset lower limit value is 10% of the full power value of the transformer at the current gear.

4. The oxidation furnace temperature control method according to claim 1, characterized in that: The method further comprises: The preset upper limit is the transformer's higher power minus the transformer's current power; The preset lower limit value is the current power of the transformer minus one level lower power of the transformer.

5. The oxidation furnace temperature control method according to claim 1, characterized in that: The method further comprises: When a shift command of the transformer is detected, the command time of the last shift command is obtained to determine the time difference between the two shifts; Detect whether the time difference between two gear shifts is greater than a preset time length. When the time difference between the two gear shifts is less than the preset time length, stop executing the gear shift command of the transformer.

6. An oxidation furnace temperature control system, characterized in that: The system includes: a heater, a transformer, a power regulator, and a PID controller; a detection module, configured to adjust the furnace temperature PID controller to an automatic mode when a temperature change instruction of the oxidation furnace is detected, so that the PID controller obtains a current furnace temperature and a target furnace temperature corresponding to the temperature change instruction, compares the current furnace temperature with the target furnace temperature, and adjusts the output power of the power regulator based on the furnace temperature difference; A gear-up module is used to detect that the target furnace temperature is greater than the current furnace temperature and the output power of the power regulator is greater than a preset upper limit value, turn off the power regulator, issue a transformer gear-up instruction, so that the transformer increases the output by one gear, and reactivate the PID controller to adjust the output power of the power regulator based on the furnace temperature difference; The downshift module is used to detect that the target furnace temperature is lower than the current furnace temperature and the output power of the power regulator is lower than a preset lower limit value, shut down the power regulator, issue a transformer downshift instruction, so that the transformer can reduce the output by one gear, and reactivate the PID controller to adjust the output power of the power regulator based on the furnace temperature difference.

7. The oxidation furnace temperature control system according to claim 1, characterized in that: The system further comprises: A first adjustment module, configured to adjust the initial MV setting of the PID when the transformer increases the output by one gear, wherein the adjustment basis of the initial MV setting is the current gear power of the transformer and the higher gear power; The second adjustment module is used to adjust the initial MV setting of the PID when the transformer reduces the output by one gear, and the adjustment basis of the initial MV setting is the current gear power of the transformer and the lower gear power.

8. The oxidation furnace temperature control system according to claim 1, characterized in that: The system further comprises: A judgment module is used to obtain the instruction time of the last gear shift instruction when a gear shift instruction of the transformer is detected, and to judge the time difference between the two gear shifts; The stop module is used to detect whether the time difference between two gear shifts is greater than a preset time length. When the time difference between the two gear shifts is less than the preset time length, the execution of the transformer's gear shift instruction is stopped.

9. An electronic device comprising a processor and a memory; The processor is connected to the memory; The memory is used to store executable program code; The processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to execute the method according to any one of claims 1 to 5.

10. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method according to any one of claims 1 to 5.

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