A hot air temperature control method and apparatus

Abstract

The application provides a hot air temperature control method and device, the method comprising: obtaining a tobacco detection temperature value; determining a deviation control value according to the tobacco detection temperature value and a tobacco set temperature value; determining a target hot air valve opening control interval corresponding to the deviation control value; determining a cascade factor corresponding to the target hot air valve opening control interval, the cascade factor being used to indicate a change rate of the tobacco temperature in a tobacco conditioning process; and controlling a change of the opening of the hot air valve in the tobacco conditioning process based on the cascade factor and a valve opening reference value. The application can accurately control the opening of the hot air valve in the tobacco conditioning process to adjust the tobacco detection temperature value, realize automatic control of the tobacco conditioning process, and make the control process of the tobacco conditioning process more refined.

Description

Technical Field

[0001] This application relates to the field of tobacco leaf rehumidification, and more specifically, to a hot air temperature control method and apparatus. Background Technology

[0002] In the existing technology, the hot air temperature regulation in the tobacco leaf re-moistening process in tobacco factories is controlled by manual experience. After the preheating stage, hot air with water vapor is used to further moisten the tobacco leaves. The amount of hot air with water vapor is increased or decreased based on past experience, which cannot achieve refined and automated process control, and cannot accurately control the re-moistening hot air temperature.

[0003] Because the steam valve controls the actual hot air temperature adjustment with a delay, an excessive increase or decrease in steam will cause excessive fluctuations in the hot air temperature, resulting in large temperature variations in the tobacco leaves and making it impossible to achieve steady-state control. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a hot air temperature control method and apparatus to overcome at least one of the above-mentioned defects.

[0005] In a first aspect, embodiments of this application provide a hot air temperature control method, the method comprising: acquiring a detected temperature value of tobacco leaves; determining a deviation control value based on the detected temperature value of tobacco leaves and a set temperature value of tobacco leaves; determining a target hot air valve opening control range corresponding to the deviation control value; determining a cascading factor corresponding to the target hot air valve opening control range, the cascading factor being used to indicate the rate of change of tobacco leaf temperature in the tobacco leaf rehumidification process; and controlling the opening change of the hot air valve in the tobacco leaf rehumidification process based on the cascading factor and a valve opening reference value.

[0006] In one optional embodiment of this application, determining the cascade factor corresponding to the target hot air valve opening control interval includes: determining the cascade factor corresponding to the target hot air valve opening control interval based on the pre-constructed correspondence between multiple hot air valve opening control intervals and multiple cascade factors.

[0007] In one optional embodiment of this application, the plurality of hot air valve opening control intervals include a first hot air valve opening control interval, a second hot air valve opening control interval, and a third hot air valve opening control interval. Each hot air valve opening control interval corresponds to a different deviation value range. The step of determining the target hot air valve opening control interval corresponding to the deviation control value includes: determining the target deviation value range into which the deviation control value falls; and determining the hot air valve opening control interval corresponding to the target deviation value range as the target hot air valve opening control interval.

[0008] In one optional embodiment of this application, the cascading factor corresponding to each hot air valve opening control interval is determined by the following formula: multiple sets of experimental data corresponding to the hot air valve opening control interval are obtained, each set of experimental data including the experimental temperature value of tobacco leaves and the opening degree of the corresponding hot air valve; the multiple sets of experimental data are substituted into the following formula to obtain the cascading factor corresponding to the hot air valve opening control interval.

[0009]

[0010]

[0011] Among them, y (i) x represents the experimental temperature value of tobacco leaves under the i-th set of experimental data. (i) Let represent the opening degree of the hot air valve under the i-th set of experimental data, 1≤i≤m, m represents the number of sets of experimental data selected from the multiple sets of experimental data corresponding to the opening control interval of the hot air valve, a represents the cascade factor corresponding to the opening control interval of the hot air valve, and b represents the intercept corresponding to the opening control interval of the hot air valve.

[0012] In one optional embodiment of this application, obtaining multiple sets of experimental data corresponding to the hot air valve opening control range includes: obtaining multiple sets of candidate experimental data during the experiment, each set of candidate experimental data including the tobacco leaf experimental temperature value and the opening of the hot air valve; for each set of candidate experimental data, determining the experimental deviation control value corresponding to the set of candidate experimental data based on the tobacco leaf experimental temperature value and the tobacco leaf set temperature value corresponding to the set of candidate experimental data, and dividing the tobacco leaf experimental temperature value and the opening of the hot air valve corresponding to the set of candidate experimental data into the hot air valve opening control range corresponding to the experimental deviation control value.

[0013] In one optional embodiment of this application, the target hot air valve opening control range is the first hot air valve opening control range, and the cascading factor is a first cascading factor corresponding to the first hot air valve opening control range. The step of controlling the opening change of the hot air valve in the tobacco rehumidification process based on the cascading factor and the valve opening reference value includes: determining whether the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf; if the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf, then obtaining the first hot air valve opening value at the current moment, and controlling the opening of the hot air valve to decrease by a first valve opening change value per second based on the first hot air valve opening value, wherein the first valve opening change value is the product of the first cascading factor and the valve opening reference value; if the detected temperature value of the tobacco leaf is not greater than the set temperature value of the tobacco leaf, then obtaining the second hot air valve opening value at the current moment, and controlling the opening of the hot air valve to increase by a second valve opening change value per second based on the second hot air valve opening value, wherein the second valve opening change value is the product of the first cascading factor and the valve opening reference value.

[0014] In one optional embodiment of this application, the target hot air valve opening control range is the second hot air valve opening control range, and the cascading factor is a second cascading factor corresponding to the second hot air valve opening control range. The step of controlling the opening change of the hot air valve in the tobacco rehumidification process based on the cascading factor and the valve opening reference value includes: determining whether the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf; if the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf, then obtaining the current hot air valve opening value and controlling... The opening of the hot air valve is adjusted by decreasing the change in the opening value of the third hot air valve by a factor of less than one second. The change in the opening value of the third valve is the product of the second cascade factor and the valve opening reference value. If the detected temperature value of the tobacco leaf is not greater than the set temperature value of the tobacco leaf, the opening value of the fourth hot air valve at the current moment is obtained, and the opening of the hot air valve is adjusted by increasing the change in the opening value of the fourth hot air valve by a factor of less than one second. The change in the opening value of the fourth valve is the product of the second cascade factor and the valve opening reference value.

[0015] In one optional embodiment of this application, the target hot air valve opening control range is the third hot air valve opening control range, and the cascading factor is the third cascading factor corresponding to the third hot air valve opening control range. The step of controlling the opening change of the hot air valve in the tobacco rehumidification process based on the cascading factor and the valve opening reference value includes: determining whether the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf; if the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf, then obtaining the opening value of the fifth hot air valve at the current moment and controlling... The opening of the hot air valve is adjusted by decreasing the change in the opening value of the fifth hot air valve by a factor of one second, where the change in the opening value of the fifth valve is the product of the third cascade factor and the valve opening reference value. If the detected temperature value of the tobacco leaf is not greater than the set temperature value of the tobacco leaf, the opening value of the sixth hot air valve at the current moment is obtained, and the opening of the hot air valve is adjusted by increasing the change in the opening value of the sixth hot air valve by a factor of one second, where the change in the opening value of the sixth valve is the product of the third cascade factor and the valve opening reference value.

[0016] Secondly, embodiments of this application also provide a hot air temperature control device, the device comprising: a tobacco leaf detection temperature value acquisition module, used to acquire a tobacco leaf detection temperature value; a deviation control value determination module, used to determine a deviation control value based on the tobacco leaf detection temperature value and a set tobacco leaf temperature value; a target hot air valve opening control range determination module, used to determine a target hot air valve opening control range corresponding to the deviation control value; a cascade factor determination module, used to determine a cascade factor corresponding to the target hot air valve opening control range, the cascade factor indicating the rate of change of tobacco leaf temperature in the tobacco leaf rehumidification process; and a hot air valve opening control module, used to control the opening change of the hot air valve in the tobacco leaf rehumidification process based on the cascade factor and a valve opening reference value.

[0017] Thirdly, embodiments of this application also provide an electronic device, including: a processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the memory via the bus, and the processor executes the machine-readable instructions to perform the steps of the method described above.

[0018] This application provides a hot air temperature control method and device. Based on the cascade factor corresponding to the target hot air valve opening control range and the valve opening reference value, the opening change of the hot air valve in the tobacco leaf rehumidification process is controlled. This method can accurately control the opening of the hot air valve in the tobacco leaf rehumidification process to adjust the tobacco leaf detection temperature value, thereby realizing the automated control of the tobacco leaf rehumidification process and making the control process of the tobacco leaf rehumidification process more refined.

[0019] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A flowchart of the hot air temperature control method provided in the embodiments of this application;

[0022] Figure 2 This is a control flowchart of the PID algorithm provided in the embodiments of this application;

[0023] Figure 3 This is a schematic diagram of the hot air temperature control device provided in the embodiments of this application;

[0024] Figure 4 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. Based on the embodiments of this application, every other embodiment obtained by those skilled in the art without inventive effort falls within the scope of protection of this application.

[0026] First, the applicable scenarios for this application will be introduced. This application can be applied to the field of tobacco leaf rehydration.

[0027] Currently, hot air temperature regulation relies on manual experience. Increasing or decreasing the volume of hot air containing water vapor is based on past experience, which fails to achieve precise and automated process control and cannot accurately control the temperature of the rehumidified hot air. Furthermore, because the steam valve's control of the actual hot air temperature adjustment is delayed, excessive increases or decreases in steam can cause excessive fluctuations in the hot air temperature, making steady-state control impossible.

[0028] To address at least one of the aforementioned problems, the purpose of this application is to provide a hot air temperature control method and apparatus that can control the opening change of the hot air valve in the tobacco leaf rehumidification process based on the target hot air valve opening control range where the deviation control value is located. This achieves automated control and refined control process during the tobacco leaf rehumidification process, and can accurately control the detected temperature value of the tobacco leaves.

[0029] This application provides a hot air temperature control method. Please refer to [link / reference]. Figure 1 , Figure 1 This is a flowchart of a hot air temperature control method provided in an embodiment of this application. The specific method includes:

[0030] S101. Obtain the temperature value of the tobacco leaves.

[0031] The temperature value of the tobacco leaves is the temperature value detected by the temperature sensor.

[0032] S102. Determine the deviation control value based on the detected temperature value and the set temperature value of the tobacco leaves.

[0033] In this step, the temperature setting for the tobacco leaves can be a value set by the experimenter according to the experimental requirements, set before each tobacco leaf rehumidification process, or it can be a default temperature value that does not need to be set each time and can be the same as the last set temperature.

[0034] Specifically, the deviation control value is the absolute value of the difference between the detected temperature value of the tobacco leaves and the set temperature value of the tobacco leaves.

[0035] S103. Determine the target hot air valve opening control range corresponding to the deviation control value.

[0036] In this embodiment of the application, a correspondence between multiple hot air valve opening control intervals and multiple cascade factors can be pre-constructed. In this step, based on the constructed correspondence, the target hot air valve opening control interval corresponding to the deviation control value is determined.

[0037] For example, the multiple hot air valve opening control intervals include a first hot air valve opening control interval, a second hot air valve opening control interval, and a third hot air valve opening control interval, each corresponding to a different deviation value range. Preferably, the multiple deviation value ranges may include a first deviation value range [0, 1], a second deviation value range (1, 5], and a third deviation value range (5, +∞).

[0038] Here, 1 and 5 represent data obtained from multiple experiments conducted by the researchers that meet the experimental requirements. The deviation range is not divided equally, but rather in a gradually increasing manner. As the deviation range gradually increases, the cascade factor also gradually increases. This allows for precise control of the tobacco leaf detection temperature value by using the corresponding cascade factor to make adjustments of different magnitudes when the deviation range is large, i.e., when the absolute value of the difference between the tobacco leaf detection temperature value and the tobacco leaf set temperature value is large.

[0039] Specifically, the target hot air valve opening control range corresponding to the deviation control value can be determined in the following way: determine the target deviation value range into which the deviation control value falls, and determine the hot air valve opening control range corresponding to the target deviation value range into which the value falls as the target hot air valve opening control range.

[0040] For example, if 0 ≤ deviation control value ≤ 1, then the target deviation value range is determined as the first deviation value range, and the target hot air valve opening control interval is the first hot air valve opening control interval.

[0041] If 1 < deviation control value ≤ 5, then the target deviation value range is determined as the second deviation value range, and the target hot air valve opening control range is the second hot air valve opening control range.

[0042] If the deviation control value is greater than 5, then the target deviation value range is determined to be the third deviation value range, and the target hot air valve opening control range is the third hot air valve opening control range.

[0043] S104. Determine the cascade factor corresponding to the target hot air valve opening control range. The cascade factor is used to indicate the rate of change of tobacco temperature during the tobacco rehumidification process.

[0044] In this step, based on the pre-constructed correspondence between multiple hot air valve opening control intervals and multiple cascade factors, the cascade factor corresponding to the target hot air valve opening control interval is determined.

[0045] Multiple cascade factors include a first cascade factor, a second cascade factor, and a third cascade factor. The first hot air valve opening control interval corresponds to the first cascade factor, the second hot air valve opening control interval corresponds to the second cascade factor, and the third hot air valve opening control interval corresponds to the third cascade factor.

[0046] The derivation of the cascade factor is as follows:

[0047] For values ​​such as the set temperature of tobacco leaves, the detected temperature of tobacco leaves, and the opening degree of the hot air valve at the same time, a univariate linear regression model is used for analysis.

[0048] y = ax + b(1)

[0049] In formula (1), y represents the dependent variable (experimental temperature value of tobacco leaves), x represents the independent variable (opening degree of air valve), a represents the regression coefficient, and b represents the intercept.

[0050] Using the least squares method to find the coefficients and intercepts, the fitted equation of the linear regression model is y = ax + b, and the sum of squared residuals (loss function) can be defined as follows:

[0051]

[0052] By differentiating the sum of squared residuals (differentiating between a and b), the sum of squared residuals reaches its extreme value when the derivative is 0. The cascading factor corresponding to each hot air valve opening control interval is determined by the following formula:

[0053] Obtain multiple sets of experimental data corresponding to the hot air valve opening control range. Each set of experimental data includes the experimental temperature value of the tobacco leaf and the corresponding opening of the hot air valve.

[0054] Specifically, multiple sets of experimental data corresponding to the opening control range of the hot air valve can be obtained through the following methods:

[0055] Multiple sets of candidate experimental data were obtained during the experiment. Each set of candidate experimental data included the experimental temperature value of tobacco leaves and the opening degree of the hot air valve.

[0056] For each set of candidate experimental data, based on the experimental temperature value of the tobacco leaf and the set temperature value of the tobacco leaf corresponding to the set of candidate experimental data, the experimental deviation control value corresponding to the set of candidate experimental data is determined, and the experimental temperature value of the tobacco leaf and the opening degree of the hot air valve corresponding to the set of candidate experimental data are divided into the hot air valve opening degree control range corresponding to the experimental deviation control value.

[0057] Substituting multiple sets of experimental data into the following formula, the cascade factor corresponding to the hot air valve opening control range is obtained.

[0058]

[0059]

[0060] In formulas (2), (3), and (4), y (i) x represents the experimental temperature value of tobacco leaves under the i-th set of experimental data. (i) Let represent the opening degree of the hot air valve under the i-th set of experimental data, 1≤i≤m, m represents the number of sets of experimental data selected from the multiple sets of experimental data corresponding to the opening control interval of the hot air valve, a represents the cascade factor corresponding to the opening control interval of the hot air valve, b represents the intercept corresponding to the opening control interval of the hot air valve, and L is the value of the sum of squared residuals.

[0061] In this way, the first cascade factor, the second cascade factor, and the third cascade factor can all be calculated. The calculated results for the three hot air valve opening control intervals are as follows: First hot air valve opening control interval: a = 1, b = 0.1; Second hot air valve opening control interval: a = 1.25, b = 0.3; Third hot air valve opening control interval: a = 1.5, b = 0.5.

[0062] S105. Based on the cascade factor and valve opening reference value, control the opening change of the hot air valve in the tobacco leaf rehumidification process.

[0063] In the first embodiment, the target hot air valve opening control range is the first hot air valve opening control range, and the cascading factor is the first cascading factor corresponding to the first hot air valve opening control range.

[0064] Determine whether the detected temperature value of the tobacco leaves is greater than the set temperature value for the tobacco leaves.

[0065] If the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf, the opening value of the first hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to decrease by the change value of the first valve opening per second based on the opening value of the first hot air valve. The change value of the first valve opening is the product of the first cascade factor and the valve opening reference value.

[0066] If the detected temperature value of the tobacco leaf is not greater than the set temperature value of the tobacco leaf, then the opening value of the second hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to increase the change value of the second valve opening by one second based on the opening value of the second hot air valve. The change value of the second valve opening is the product of the first cascade factor and the valve opening reference value.

[0067] In the second embodiment, the target hot air valve opening control range is the second hot air valve opening control range, and the cascading factor is the second cascading factor corresponding to the second hot air valve opening control range.

[0068] Determine whether the detected temperature value of the tobacco leaves is greater than the set temperature value for the tobacco leaves.

[0069] If the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf, the opening value of the third hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to decrease by the value of the change in the opening of the third hot air valve per second. The value of the change in the opening of the third valve is the product of the second cascade factor and the valve opening reference value.

[0070] If the detected temperature value of the tobacco leaf is not greater than the set temperature value of the tobacco leaf, then the opening value of the fourth hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to increase by the change value of the fourth valve opening per second based on the opening value of the fourth hot air valve. The change value of the fourth valve opening is the product of the second cascade factor and the valve opening reference value.

[0071] In the third embodiment, the target hot air valve opening control range is the third hot air valve opening control range, and the cascading factor is the third cascading factor corresponding to the third hot air valve opening control range.

[0072] Determine whether the detected temperature value of the tobacco leaves is greater than the set temperature value for the tobacco leaves.

[0073] If the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf, the opening value of the fifth hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to decrease by the value of the fifth hot air valve opening per second. The value of the fifth valve opening change is the product of the third cascade factor and the valve opening reference value.

[0074] If the detected temperature value of the tobacco leaf is not greater than the set temperature value of the tobacco leaf, then the opening value of the sixth hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to increase by the change value of the sixth valve opening per second based on the opening value of the sixth hot air valve. The change value of the sixth valve opening is the product of the third cascade factor and the valve opening reference value.

[0075] Specifically, the valve opening reference value is the standard value of the opening degree of the hot air valve adjusted per second, obtained by the experimenters through multiple experiments. Preferably, it can be 0.12.

[0076] In existing technologies, the steam valve control for adjusting the tobacco leaf detection temperature value has a lag. When there is an increase or decrease in excess steam, the manual valve opening is large. If the temperature has not reached the set value, the valve opening will increase, causing the temperature to rise rapidly. This application controls the opening change of the hot air valve in the tobacco leaf rehumidification process by multiplying 0.12 by the cascade factor. The opening change of the hot air valve is small, and the temperature changes steadily, thus achieving steady-state control.

[0077] This application divides the hot air valve opening control range based on the deviation control value determined by the tobacco leaf detection temperature value and the tobacco leaf set temperature value. Different cascading factors are determined according to different hot air valve opening control ranges to control the opening changes of the hot air valve in the tobacco leaf re-humidification process, so as to achieve precise control of the opening of the hot air valve in the tobacco leaf re-humidification process, thereby adjusting the tobacco leaf detection temperature value and realizing the automated control of the tobacco leaf re-humidification process, making the tobacco leaf re-humidification process more refined.

[0078] Tobacco leaf rehydration is the first step in the tobacco processing process. Its basic task is to use appropriate rehydration methods for tobacco leaves with different moisture levels to increase the moisture and temperature of the tobacco leaves, thereby making the tobacco leaves soft, tough, and easy to loosen, reducing losses during tobacco processing, and improving the quality of tobacco processing. This application improves the pass rate of tobacco leaf temperature detection in the tobacco leaf rehydration process.

[0079] Please see Figure 2 , Figure 2This is a control flowchart of the PID algorithm provided in an embodiment of this application.

[0080] like Figure 2 As shown, PID is an abbreviation for Proportional, Integral, and Differential. As the name suggests, the PID control algorithm is a control algorithm that combines proportional, integral, and derivative functions into one. The essence of PID control is to perform calculations based on the input deviation value according to the proportional, integral, and derivative functional relationships, and use the calculation result to control the output.

[0081] In industrial control, the PID algorithm is used to achieve precise dynamic control based on the proportional, integral, and derivative of system errors. The PID algorithm calculates the PV value (measured by the measured temperature of the tobacco leaves), the SP value (measured by the setpoint temperature of the tobacco leaves), and the CV value (measured by the opening degree of the hot air valve). A new CV value is then output to adjust the PV value to approximate the SP value.

[0082] Please see Figure 3 , Figure 3 This application also provides a hot air temperature control method device 300 corresponding to the hot air temperature control method in the embodiments, such as... Figure 3 As shown, the hot air temperature control method apparatus 300 includes:

[0083] The tobacco leaf temperature value acquisition module 301 is used to acquire the tobacco leaf temperature value.

[0084] The deviation control value determination module 302 is used to determine the deviation control value based on the detected temperature value of the tobacco leaf and the set temperature value of the tobacco leaf;

[0085] The target hot air valve opening control range determination module 303 is used to determine the target hot air valve opening control range corresponding to the deviation control value;

[0086] The cascade factor determination module 304 is used to determine the cascade factor corresponding to the target hot air valve opening control range. The cascade factor is used to indicate the rate of change of tobacco temperature in the tobacco rehumidification process.

[0087] The hot air valve opening control module 305 is used to control the opening change of the hot air valve in the tobacco leaf rehumidification process based on the cascade factor and the valve opening reference value.

[0088] Since the principle of the device in this application embodiment is similar to the hot air temperature control method described above in this application embodiment, the implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0089] This application also provides an electronic device. The electronic device includes a processor, a memory, and a bus.

[0090] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 4 As shown, the electronic device 400 includes a processor 410, a memory 420, and a bus 430.

[0091] The memory 420 stores machine-readable instructions executable by the processor 410. When the electronic device 400 is running, the processor 410 communicates with the memory 420 via the bus 430. When the machine-readable instructions are executed by the processor 410, they can perform the operations described above. Figure 1 The steps of the hot air temperature control method in the illustrated method embodiment can be found in the method embodiment for specific implementation, and will not be repeated here.

[0092] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0093] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0094] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0095] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0096] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device, such as a personal computer, server, or network device, to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0097] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for controlling hot air temperature, characterized in that, include: Obtain the temperature value of the tobacco leaves; The deviation control value is determined based on the detected temperature value and the set temperature value of the tobacco leaves; Determine the target hot air valve opening control range corresponding to the deviation control value; Determine the cascading factor corresponding to the target hot air valve opening control range, the cascading factor being used to indicate the rate of change of tobacco temperature during the tobacco rehumidification process; Based on the cascading factor and the valve opening reference value, the opening change of the hot air valve in the tobacco leaf re-moistening process is controlled. The opening of the hot air valve is controlled to decrease or increase the valve opening change value per second based on the hot air valve opening value at the current moment. The valve opening change value is the product of the cascading factor and the valve opening reference value. The step of determining the cascading factor corresponding to the target hot air valve opening control range includes: Based on the pre-constructed correspondence between multiple hot air valve opening control intervals and multiple cascade factors, the cascade factor corresponding to the target hot air valve opening control interval is determined. The plurality of hot air valve opening control intervals include a first hot air valve opening control interval, a second hot air valve opening control interval, and a third hot air valve opening control interval. Each hot air valve opening control interval corresponds to a different deviation value range. Determining the target hot air valve opening control interval corresponding to the deviation control value includes: Determine the target deviation range into which the deviation control value falls; The hot air valve opening control range corresponding to the target deviation value range is determined as the target hot air valve opening control range. The cascading factor corresponding to each hot air valve opening control interval is determined by the following formula: Obtain multiple sets of experimental data corresponding to the hot air valve opening control range. Each set of experimental data includes the experimental temperature value of the tobacco leaf and the corresponding opening of the hot air valve. Substitute the multiple sets of experimental data into the following formula to obtain the cascade factor corresponding to the hot air valve opening control range; Among them, y （i） x represents the experimental temperature value of tobacco leaves under the i-th set of experimental data. （i） Let represent the opening degree of the hot air valve under the i-th set of experimental data, 1≤i≤m, m represents the number of sets of experimental data selected from the multiple sets of experimental data corresponding to the opening control interval of the hot air valve, a represents the cascade factor corresponding to the opening control interval of the hot air valve, and b represents the intercept corresponding to the opening control interval of the hot air valve.

2. The hot air temperature control method according to claim 1, characterized in that, The acquisition of multiple sets of experimental data corresponding to the hot air valve opening control range includes: Multiple sets of candidate experimental data were obtained during the experiment. Each set of candidate experimental data included the experimental temperature value of tobacco leaves and the opening degree of the hot air valve. For each set of candidate experimental data, based on the experimental temperature value of the tobacco leaf and the set temperature value of the tobacco leaf corresponding to the set of candidate experimental data, the experimental deviation control value corresponding to the set of candidate experimental data is determined, and the experimental temperature value of the tobacco leaf and the opening degree of the hot air valve corresponding to the set of candidate experimental data are divided into the hot air valve opening degree control range corresponding to the experimental deviation control value.

3. The hot air temperature control method according to claim 2, characterized in that, The target hot air valve opening control range is the first hot air valve opening control range, and the cascading factor is the first cascading factor corresponding to the first hot air valve opening control range. The step of controlling the opening change of the hot air valve in the tobacco rehumidification process based on the cascade factor and the valve opening reference value includes: Determine whether the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf; If the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf, then the opening value of the first hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to decrease by the change value of the first valve opening per second based on the first hot air valve opening value. The change value of the first valve opening is the product of the first cascade factor and the valve opening reference value. If the detected temperature value of the tobacco leaf is not greater than the set temperature value of the tobacco leaf, then the opening value of the second hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to increase by the change value of the second valve opening per second based on the opening value of the second hot air valve. The change value of the second valve opening is the product of the first cascade factor and the valve opening reference value.

4. The hot air temperature control method according to claim 3, characterized in that, The target hot air valve opening control range is the second hot air valve opening control range, and the cascading factor is the second cascading factor corresponding to the second hot air valve opening control range. The step of controlling the opening change of the hot air valve in the tobacco rehumidification process based on the cascade factor and the valve opening reference value includes: Determine whether the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf; If the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf, the opening value of the third hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to decrease by a value per second based on the opening value of the third hot air valve. The value of the change in the opening of the third valve is the product of the second cascade factor and the valve opening reference value. If the detected temperature value of the tobacco leaf is not greater than the set temperature value of the tobacco leaf, then the opening value of the fourth hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to increase by the change value of the fourth valve opening per second based on the opening value of the fourth hot air valve. The change value of the fourth valve opening is the product of the second cascade factor and the valve opening reference value.

5. The hot air temperature control method according to claim 4, characterized in that, The target hot air valve opening control range is the third hot air valve opening control range, and the cascading factor is the third cascading factor corresponding to the third hot air valve opening control range. The step of controlling the opening change of the hot air valve in the tobacco rehumidification process based on the cascade factor and the valve opening reference value includes: Determine whether the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf; If the detected temperature value of the tobacco leaf is greater than the set temperature value of the tobacco leaf, then the opening value of the fifth hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to decrease by the change value of the fifth valve opening per second based on the opening value of the fifth hot air valve. The change value of the fifth valve opening is the product of the third cascade factor and the valve opening reference value. If the detected temperature value of the tobacco leaf is not greater than the set temperature value of the tobacco leaf, then the opening value of the sixth hot air valve at the current moment is obtained, and the opening of the hot air valve is controlled to increase by the change value of the sixth valve opening per second based on the opening value of the sixth hot air valve. The change value of the sixth valve opening is the product of the third cascade factor and the valve opening reference value.

6. A hot air temperature control device, characterized in that, The device includes: The tobacco leaf temperature value acquisition module is used to acquire the tobacco leaf temperature value before the tobacco leaf rehumidification process. The deviation control value determination module is used to determine the deviation control value based on the detected temperature value of the tobacco leaf and the set temperature value of the tobacco leaf; The target hot air valve opening control range determination module is used to determine the target hot air valve opening control range corresponding to the deviation control value; A cascade factor determination module is used to determine the cascade factor corresponding to the target hot air valve opening control range, wherein the cascade factor is used to indicate the rate of change of tobacco temperature in the tobacco rehumidification process. The hot air valve opening control module is used to control the opening change of the hot air valve in the tobacco leaf rehumidification process based on the cascade factor and the valve opening reference value. The hot air valve opening is controlled to decrease or increase the valve opening change value per second based on the hot air valve opening value at the current moment. The valve opening change value is the product of the cascade factor and the valve opening reference value. The step of determining the cascading factor corresponding to the target hot air valve opening control range includes: Based on the pre-constructed correspondence between multiple hot air valve opening control intervals and multiple cascade factors, the cascade factor corresponding to the target hot air valve opening control interval is determined. The plurality of hot air valve opening control intervals include a first hot air valve opening control interval, a second hot air valve opening control interval, and a third hot air valve opening control interval. Each hot air valve opening control interval corresponds to a different deviation value range. Determining the target hot air valve opening control interval corresponding to the deviation control value includes: Determine the target deviation range into which the deviation control value falls; The hot air valve opening control range corresponding to the target deviation value range is determined as the target hot air valve opening control range. The cascading factor corresponding to each hot air valve opening control interval is determined by the following formula: Obtain multiple sets of experimental data corresponding to the hot air valve opening control range. Each set of experimental data includes the experimental temperature value of the tobacco leaf and the corresponding opening of the hot air valve. Substitute the multiple sets of experimental data into the following formula to obtain the cascade factor corresponding to the hot air valve opening control range; Among them, y （i） x represents the experimental temperature value of tobacco leaves under the i-th set of experimental data. （i） Let represent the opening degree of the hot air valve under the i-th set of experimental data, 1≤i≤m, m represents the number of sets of experimental data selected from the multiple sets of experimental data corresponding to the opening control interval of the hot air valve, a represents the cascade factor corresponding to the opening control interval of the hot air valve, and b represents the intercept corresponding to the opening control interval of the hot air valve.

7. An electronic device, characterized in that, include: The device includes a processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is in operation, the processor communicates with the memory via the bus, and the processor executes the machine-readable instructions to perform the steps of the method as described in any one of claims 1 to 5.

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