Cut tobacco drying control method, device and equipment and storage medium

Abstract

The embodiment of the invention discloses a cut tobacco drying control method and device, equipment and a storage medium, and the method comprises the steps that a target transfer function is determined according to a cut tobacco drying temperature preset value and a cut tobacco drying time preset value; wherein the target transfer function is a transfer function between a cut tobacco quality change rate error and a drying temperature error; the tobacco shred quality change rate is the change rate of the dried tobacco shred quality corresponding to the tobacco shred quality before drying; constructing a drying temperature control system according to the target transfer function and a cut tobacco quality change rate preset value; the drying temperature control system comprises a PID (Proportion Integration Differentiation) controller; the drying temperature control system controls the temperature parameter of the preset tobacco shred dryer, and the processing process of drying the target tobacco shred is completed. According to the technical scheme, parameters in the tobacco shred drying process can be automatically adjusted based on the drying temperature control system, and the tobacco shred drying processing stability is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of cut tobacco processing, and particularly to a method, device, equipment and storage medium for controlling cut tobacco drying. Background Art

[0002] Thermogravimetric analysis technology is a method for measuring the relationship between the mass of a substance and temperature or time under programmed temperature control. By analyzing the thermogravimetric curve (TG curve), information related to mass such as the composition, thermal stability, thermal decomposition and generated products of the sample and its possible intermediate products can be studied.

[0003] With the rapid development of new tobacco, heated tobacco products have gradually become a hot spot in product research and development. Heated tobacco products heat the tobacco core segment through a special heat source and generate smoke for consumers to inhale in a non-combustion state. The release characteristics of the smoke determine the sensory quality of the product. At present, most of the tobacco cores used to generate smoke are two types: reconstituted tobacco leaves by the thick slurry method with ordered filling and reconstituted tobacco leaves by the papermaking method with disordered filling. In recent years, in order to enrich the tobacco natural flavor characteristics of heated tobacco products, cigarette enterprises have begun to use natural tobacco leaf raw materials as the core of heated tobacco products.

[0004] In heated tobacco products, glycerol is the main smoke generator and has various properties, such as moisture retention, high activity, antioxidant and low-temperature smoke generation. Glycerol can carry tobacco flavor components at relatively low temperatures (below 300°C), which is crucial for the quality of heated tobacco products.

[0005] Compared with traditional cigarettes, the basic condition for smoking of new heated tobacco products is that the cut tobacco needs to be preheated to about 300°C. If the moisture in the cut tobacco is not processed sufficiently, water vapor will be generated during suction, resulting in a high smoke temperature. According to research, for natural tobacco leaves to be used in heated tobacco products, the moisture content of the cut tobacco needs to be reduced to less than 3% to avoid excessive smoke temperature caused by water vapor during suction. Currently, the moisture content after drying is mainly used as the quality control index for cut tobacco drying in the production line. However, in this process, the stability control of the glycerol quality in the cut tobacco is lacking, and it is easy to have too high or too low drying intensity, resulting in fluctuations in cut tobacco quality and unable to meet the quality control requirements of heated tobacco production. Summary of the Invention

[0006] The embodiments of the present invention provide a method, device, equipment and storage medium for controlling cut tobacco drying, which can improve the stability of cut tobacco drying and processing.

[0007] In a first aspect, the embodiments of the present invention provide a method for controlling cut tobacco drying, which includes:

[0008] Determine the target transfer function according to the preset value of the cut tobacco drying temperature and the preset value of the cut tobacco drying time; wherein, the target transfer function is the transfer function between the error of the cut tobacco mass change rate and the drying temperature error; the cut tobacco mass change rate is the change rate of the mass of the dried cut tobacco relative to the mass of the cut tobacco before drying; construct a drying temperature control system according to the target transfer function and the preset value of the cut tobacco mass change rate; wherein, the drying temperature control system includes a PID controller; so that the drying temperature control system controls the temperature parameters of the preset cut tobacco dryer to complete the processing process of drying the target cut tobacco.

[0009] In a second aspect, an embodiment of the present invention provides a cut tobacco drying control device, which includes:

[0010] A transfer function determination module, configured to determine a target transfer function according to the preset value of the cut tobacco drying temperature and the preset value of the cut tobacco drying time; wherein, the target transfer function is the transfer function between the error of the cut tobacco mass change rate and the drying temperature error; the cut tobacco mass change rate is the change rate of the mass of the dried cut tobacco relative to the mass of the cut tobacco before drying; a control system construction module, configured to construct a drying temperature control system according to the target transfer function and the preset value of the cut tobacco mass change rate; wherein, the drying temperature control system includes a PID controller; a cut tobacco processing module, configured to enable the drying temperature control system to control the temperature parameters of the preset cut tobacco dryer to complete the processing process of drying the target cut tobacco.

[0011] In a third aspect, an embodiment of the present invention provides a computer device, which includes:

[0012] One or more processors;

[0013] A memory for storing one or more programs;

[0014] When the one or more programs are executed by the one or more processors, the one or more processors implement the cut tobacco drying control method described in any embodiment.

[0015] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements the cut tobacco drying control method described in any embodiment.

[0016] The technical solution provided by the embodiments of the present invention determines a target transfer function according to a preset value of cut tobacco drying temperature and a preset value of cut tobacco drying time; wherein, the target transfer function is a transfer function between the error of the cut tobacco mass change rate and the drying temperature error; the cut tobacco mass change rate is the change rate of the mass of the cut tobacco after drying relative to the mass of the cut tobacco before drying; according to the target transfer function and the preset value of the cut tobacco mass change rate, a drying temperature control system is constructed; wherein, the drying temperature control system includes a PID controller; so that the drying temperature control system controls the temperature parameters of a preset cut tobacco dryer to complete the processing of drying the target cut tobacco. The technical solution of the embodiments of the present invention solves the problem in the prior art that during the cut tobacco processing, the drying intensity is likely to be too large or too small, and can autonomously adjust the parameters during the cut tobacco drying process based on the drying temperature control system, improving the stability of the cut tobacco drying process. Description of the Drawings

[0017] Figure 1 is a flowchart of a cut tobacco drying control method provided by an embodiment of the present invention;

[0018] Figure 2 is another flowchart of a cut tobacco drying control method provided by an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of a drying temperature control system provided by an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of the drying temperature control system corresponding to Embodiment 1 provided by an embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of the control curve corresponding to Embodiment 1 provided by an embodiment of the present invention;

[0022] Figure 6 is a schematic diagram of the drying temperature control system corresponding to Embodiment 2 provided by an embodiment of the present invention;

[0023] Figure 7 is a schematic diagram of the control curve corresponding to Embodiment 2 provided by an embodiment of the present invention;

[0024] Figure 8 is a schematic diagram of the drying temperature control system corresponding to Embodiment 3 provided by an embodiment of the present invention;

[0025] Figure 9 is a schematic diagram of the control curve corresponding to Embodiment 3 provided by an embodiment of the present invention;

[0026] Figure 10 is a schematic diagram of the structure of a cut tobacco drying control device provided by an embodiment of the present invention;

[0027] Figure 11 It is a schematic structural diagram of a computer device provided by an embodiment of the present invention. Specific implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0029] Figure 1 It is a flowchart of a cut tobacco drying control method provided by an embodiment of the present invention. The embodiments of the present invention are applicable to scenarios where cut tobacco is heated and dried. This method can be executed by a cut tobacco drying control device, and this device can be implemented in a software and / or hardware manner.

[0030] As Figure 1 shown, the cut tobacco drying control method includes the following steps:

[0031] S110. Determine a target transfer function according to a preset value of cut tobacco drying temperature and a preset value of cut tobacco drying time.

[0032] Wherein, the preset value of cut tobacco drying temperature may be a preset temperature value for drying cut tobacco. The preset value of cut tobacco drying time may be a preset time for drying cut tobacco. The preset value of cut tobacco drying temperature and the preset value of cut tobacco drying time can be set manually. The technical solution of the embodiment of the present invention can control the drying parameters of cut tobacco according to the preset value of cut tobacco drying temperature and the preset value of cut tobacco drying time, so that the change amount of the cut tobacco quality before and after drying reaches a target change amount. Wherein, the cut tobacco mentioned in the technical solution of the embodiment of the present invention is also cut tobacco, that is, the two can be understood as the same concept.

[0033] Further, the target transfer function is a transfer function between the error of the cut tobacco mass change rate and the drying temperature error. The cut tobacco mass change rate is the change rate of the mass of the dried cut tobacco relative to the mass of the cut tobacco before drying. The cut tobacco mass change rate error is the error between the set cut tobacco mass change rate and the actual cut tobacco mass change rate. The drying temperature error is the error between the set drying temperature and the actual drying temperature. Optionally, the preset value of cut tobacco drying temperature and the preset value of cut tobacco drying time can be substituted into a preset equation for obtaining a transfer function, and then the target transfer function can be obtained. By determining the target transfer function, it is convenient to construct a temperature control system for cut tobacco drying based on the target transfer function later.

[0034] S120. Construct a drying temperature control system according to the target transfer function and the preset value of the cut tobacco mass change rate.

[0035] Among them, the preset value of the cut tobacco mass change rate can be a preset cut tobacco mass change rate. That is, for the technical solution of the exemplary embodiment of the present invention, it is necessary to control the cut tobacco drying parameters so that the cut tobacco mass change rate of the dried cut tobacco reaches the preset value of the cut tobacco mass change rate. Further, the drying temperature control system can be a control system for controlling the drying temperature. Specifically, the drying temperature control system can include a PID controller. The target quantity of the drying temperature control system is the preset value of the cut tobacco mass change rate, and the controlled object of the drying temperature control system is the preset cut tobacco dryer. Among them, the preset cut tobacco dryer can be an instrument for drying and processing cut tobacco.

[0036] S130. Enable the drying temperature control system to control the temperature parameters of the preset cut tobacco dryer to complete the drying process of the target cut tobacco.

[0037] Among them, the target cut tobacco can be the cut tobacco that needs to be dried and processed. Specifically, the temperature parameters of the preset cut tobacco dryer can be controlled in real time based on the drying temperature control system to realize the real-time control of the temperature parameters in the drying process of the target cut tobacco, so that the cut tobacco mass change rate of the dried target cut tobacco reaches the preset value of the cut tobacco mass change rate.

[0038] For the technical solution provided by the embodiment of the present invention, determine the target transfer function according to the preset value of the cut tobacco drying temperature and the preset value of the cut tobacco drying time; among them, the target transfer function is the transfer function between the cut tobacco mass change rate error and the drying temperature error; the cut tobacco mass change rate is the change rate of the mass of the dried cut tobacco relative to the mass of the cut tobacco before drying; construct a drying temperature control system according to the target transfer function and the preset value of the cut tobacco mass change rate; among them, the drying temperature control system includes a PID controller; enable the drying temperature control system to control the temperature parameters of the preset cut tobacco dryer to complete the drying process of the target cut tobacco. The technical solution of the embodiment of the present invention solves the problem that in the process of cut tobacco processing in the prior art, the drying intensity is likely to be too large or too small, can autonomously adjust the parameters in the cut tobacco drying process based on the drying temperature control system, can achieve more precise control and optimize the drying process, improve the stability of cut tobacco drying and processing, and improve product quality and production efficiency.

[0039] Figure 2It is a flowchart of another method for controlling cut tobacco drying provided by an embodiment of the present invention. The embodiment of the present invention is applicable to the scenario of heating and drying cut tobacco. On the basis of the above embodiment, it further illustrates how to determine the target transfer function according to the preset value of cut tobacco drying temperature and the preset value of cut tobacco drying time. The device can be implemented in the form of software and / or hardware and integrated in a computer device with application development functions.

[0040] As Figure 2 shown, the method for controlling cut tobacco drying includes the following steps:

[0041] S210. Determine a unary prediction equation according to the preset value of cut tobacco drying temperature and the preset binary prediction equation.

[0042] Among them, the preset value of cut tobacco drying temperature can be the preset temperature value for drying cut tobacco. The preset binary prediction equation can be a binary equation for predicting the change rate of cut tobacco quality. The independent variables of the preset binary prediction equation are cut tobacco drying temperature and cut tobacco drying time, and the dependent variable is the change rate of cut tobacco quality.

[0043] Optionally, the preset binary prediction equation is:

[0044]

[0045] Among them, z(x, y) is the predicted value of the change rate of cut tobacco quality; k1 - k15 are the fitting parameters of the preset binary prediction equation; x is the cut tobacco drying temperature; y is the cut tobacco drying time; m is 0 or 4, and n is 0 or 3. Among them, k1 - k15 can be determined by fitting the preset binary prediction equation. The specific values of m and n can be determined through multiple experiments. Exemplarily, in the embodiment of the present invention, m can be 4 and n can be 0.

[0046] Furthermore, the unary prediction equation is an equation of the change rate of cut tobacco quality with respect to cut tobacco drying time. Specifically, the preset value of cut tobacco drying temperature can be substituted into the preset binary prediction equation to obtain the unary prediction equation.

[0047] S220. Determine the target transfer function according to the preset value of cut tobacco drying time and the unary prediction equation.

[0048] Among them, the target transfer function is the transfer function between the error of the change rate of cut tobacco quality and the error of drying temperature. Specifically, the derivative equation corresponding to the unary prediction equation can be obtained by taking the derivative of the unary prediction equation; the preset value of cut tobacco drying time is substituted into the derivative equation to obtain the target error value, and the reciprocal of the target error value is used as the target transfer function.

[0049] Specifically, the derivation process of obtaining the target transfer function is as follows:

[0050] When the drying temperature x is close to the control preset value x0, the unary prediction equation of the leaf mass change rate z with respect to the drying temperature x is as follows:

[0051] z(x) = z(x0) + z′(x0)(x - x0);

[0052] By moving the terms of the equation, we get:

[0053] z(x0) - z(x) = z′(x0)(x0 - x);

[0054] Let the drying temperature error e x = x0 - x, and the leaf mass change rate error e z = z0 - z. Substituting into the unary linear equation of the leaf mass change rate z with respect to the drying temperature x, we obtain the linear equation of the drying temperature error and the leaf mass change rate error:

[0055]

[0056] Furthermore, in step S3, perform Laplace transform on the linear equation of the drying temperature error and the leaf mass change rate error:

[0057]

[0058] Assume that the system input is the error Ez(S) between the preset value and the actual value of the leaf mass change rate control, and the system output is the error Ex(S) between the preset value and the actual value of the drying temperature control, to obtain the transfer function between the leaf mass change rate error and the drying temperature error.

[0059]

[0060] S230. Construct a drying temperature control system according to the target transfer function and the preset value of the leaf mass change rate.

[0061] Among them, the preset value of the leaf mass change rate can be the preset leaf mass change rate. That is, the technical solution of the exemplary embodiment of the present invention requires controlling the tobacco drying parameters so that the leaf mass change rate of the dried tobacco reaches the preset value of the leaf mass change rate. Furthermore, the drying temperature control system can be a control system for controlling the drying temperature. Specifically, the drying temperature control system can include a PID controller. The target quantity of the drying temperature control system is the preset value of the leaf mass change rate, and the controlled object of the drying temperature control system is the preset tobacco dryer. Among them, the preset tobacco dryer can be an instrument for drying and processing tobacco.

[0062] Exemplarily, Figure 3It is a schematic diagram of a drying temperature control system provided by an embodiment of the present invention. Among them, the "drying temperature controller" is also the preset cut tobacco dryer. Z0(S) is the preset value of the cut tobacco mass change rate; E z (S) is the error between the preset value and the actual value of the cut tobacco mass change rate control; G(S) is the transfer function between the cut tobacco mass change rate control error and the drying temperature error; E x (S) is the drying temperature control error; Z(S) is the actual value of the cut tobacco mass change rate.

[0063] Optionally, the PID controller can only use the proportional link and the integral link. The determination coefficients corresponding to the PID controller under different gains can be determined according to the preset value of the cut tobacco drying temperature, the preset value of the cut tobacco drying time, and the preset value of the cut tobacco mass change rate, and the target proportional gain and the target integral gain of the PID controller can be determined according to the determination coefficients corresponding to different gains. Among them, the determination coefficient is an index used to evaluate the goodness of fit of the regression model. Its value range is [0,1]. When R 2 is 1, it means that the model perfectly predicts the data, that is, all the variations of the dependent variables can be explained by the independent variables. And when R 2 is 0, it means that the model cannot explain any variation of the dependent variable. In practical applications, the closer the value of R 2 is to 1, the more data variance the model explains, and the better the fitting effect of the model. On the contrary, the closer the value of R 2 is to 0, the worse the fitting effect of the model. Specifically, the determination coefficients corresponding to different gains can be compared, and the set of proportional gain and integral gain with the largest determination coefficient can be used as the target proportional gain and the target integral gain. By introducing appropriate proportional gain and integral gain, the control performance of the system can be further improved to ensure the stability of product quality.

[0064] S240, so that the drying temperature control system controls the temperature parameters of the preset cut tobacco dryer to complete the drying process of the target cut tobacco.

[0065] Among them, the target cut tobacco can be the cut tobacco that needs to be dried. Specifically, the temperature parameters of the preset cut tobacco dryer can be controlled in real time based on the drying temperature control system to realize the real-time control of the temperature parameters during the drying process of the target cut tobacco, so that the cut tobacco mass change rate of the target cut tobacco after drying reaches the preset value of the cut tobacco mass change rate.

[0066] Optionally, the mass of the target cut tobacco after drying can also be obtained, and the actual cut tobacco mass change rate can be determined according to the mass of the target cut tobacco after drying and the mass of the target cut tobacco before drying; the drying deviation parameter can be determined according to the actual cut tobacco mass change rate and the preset value of the cut tobacco mass change rate.

[0067] Among them, the actual mass change rate of cut tobacco can be the actual mass change rate of the cut tobacco after drying and processing of the target cut tobacco. Specifically, the mass of the target cut tobacco after drying can be compared with the mass of the target cut tobacco before drying, and the obtained ratio can be used as the actual mass change rate of cut tobacco. The drying deviation parameter can reflect the error parameter of the actual mass change rate of cut tobacco compared with the preset mass change rate of cut tobacco. Specifically, the actual mass change rate of cut tobacco can be subtracted from the preset value of the mass change rate of cut tobacco, and the difference between the two can be used as the drying deviation parameter. By determining the drying deviation parameter, the deviation value of the drying temperature control system for drying temperature control can be determined, which is convenient for subsequent adjustment of the drying temperature control system based on the drying deviation parameter, and improves the accuracy of cut tobacco drying.

[0068] Exemplarily, to better understand the technical solution provided by the present invention, the following is an introduction to the specific embodiments of the cut tobacco drying control method:

[0069] Embodiment 1

[0070] Step 1) Taking the mass change rate of cut tobacco as the dependent variable and the drying temperature and drying time as the independent variables, establish a preset binary prediction equation for the mass change rate of cut tobacco in the heated cigarette production line:

[0071]

[0072] Step 2) Select the cut tobacco drying working point during heated cigarette production according to the cut tobacco thermogravimetric analysis results: the drying temperature is 144.53 °C, the drying time is 7 min, and the mass change rate of cut tobacco is 96.14%.

[0073] Step 3) Substitute the drying time of this working point into the preset binary prediction equation to obtain a unary prediction equation for the mass change rate of cut tobacco with respect to the drying temperature:

[0074]

[0075] Step 4) Take the derivative of the mass change rate of cut tobacco z(x) with respect to the drying temperature x to obtain the first-order derivative equation z'(x) of the mass change rate of cut tobacco with respect to the drying temperature

[0076]

[0077] Step 5) Substitute the drying temperature of the working point into z'(x) to obtain:

[0078] z′(x0) = 1.2447

[0079] Step 6) Let the system input be the error Ez(S) between the control preset value and the actual value of the cut tobacco mass change rate, and the system output be the error Ex(S) between the control preset value and the actual value of the drying temperature, and obtain the transfer function between the cut tobacco mass change rate error and the drying temperature error:

[0080]

[0081] Step 7) Establish a drying temperature control system for the cut tobacco mass change rate by using the transfer function G(S) as Figure 4 shown.

[0082] When the drying temperature is 144.53 °C and the drying time is 7 min, the actual value control curve of the preset value of 96.14% of the cut tobacco mass change rate drying temperature control system is shown in Figure 5 . During the production process of heated cigarettes, by adopting the above cut tobacco mass change rate, the actual value of the cut tobacco mass change rate after drying can reach the control preset value within 5 s, realizing the stable control of the mass change rate during the cut tobacco drying process. This system has no overshoot and solves the problem of glycerol quality fluctuation caused by too high or too low drying intensity at the production line site.

[0083] Example 2

[0084] Step 1) Take the cut tobacco mass change rate as the dependent variable, and the drying temperature and drying time as the independent variables, and establish a preset binary prediction equation for the cut tobacco mass change rate of the heated cigarette production line:

[0085]

[0086] Step 2) Select the cut tobacco drying operating point during the production of heated cigarettes according to the cut tobacco thermogravimetric analysis results: the drying temperature is 170.91 °C, the drying time is 8 min, and the cut tobacco mass change rate is 93.57%.

[0087] Step 3) Substitute the drying time of this operating point into the preset binary prediction equation to obtain a unary prediction equation of the cut tobacco mass change rate with respect to the drying temperature:

[0088]

[0089] Step 4) Take the derivative of the cut tobacco mass change rate z(x) with respect to the drying temperature x to obtain the first derivative equation z'(x) of the cut tobacco mass change rate with respect to the drying temperature

[0090]

[0091] Step 5) Substitute the drying temperature of the operating point into z'(x) to obtain:

[0092] z′(x0) = 1.1025

[0093] Step 6) Let the system input be the error Ez(S) between the control preset value and the actual value of the cut tobacco mass change rate, and the system output be the error Ex(S) between the control preset value and the actual value of the drying temperature, to obtain the transfer function between the cut tobacco mass change rate error and the drying temperature error:

[0094]

[0095] Step 7) Establish a drying temperature control system for the cut tobacco mass change rate using the transfer function G(S) as Figure 6 shown.

[0096] When the drying temperature is 170.91°C and the drying time is 8 min, the actual value control curve of the preset value of 93.57% for the cut tobacco mass change rate drying temperature control system is shown in Figure 7 . During the production process of heated cigarettes, by adopting the above cut tobacco mass change rate, the actual value of the cut tobacco mass change rate after drying can reach the control preset value within 5 s, realizing stable control of the mass change rate during the cut tobacco drying process. This system has no overshoot, solving the problem of glycerol quality fluctuation caused by excessive or insufficient drying intensity at the production line site.

[0097] Example 3

[0098] Step 1) Taking the cut tobacco mass change rate as the dependent variable and the drying temperature and drying time as the independent variables, establish a preset binary prediction equation for the cut tobacco mass change rate of the heated cigarette production line:

[0099]

[0100] Step 2) Select the cut tobacco drying operating point during the production of heated cigarettes according to the cut tobacco thermogravimetric analysis results: the drying temperature is 186.26°C, the drying time is 8.6 min, and the cut tobacco mass change rate is 90.66%.

[0101] Step 3) Substitute the drying time of this operating point into the preset binary prediction equation to obtain a unary prediction equation for the cut tobacco mass change rate with respect to the drying temperature:

[0102]

[0103] Step 4) Take the derivative of the cut tobacco mass change rate z(x) with respect to the drying temperature x to obtain the first-order derivative equation z'(x) of the cut tobacco mass change rate with respect to the drying temperature

[0104]

[0105] Step 5) Substitute the drying temperature of the operating point into z'(x) to obtain:

[0106] z′(x) = 1.1575

[0107] Step 6) Let the system input be the error Ez(S) between the control preset value and the actual value of the cut tobacco mass change rate, and the system output be the error Ex(S) between the control preset value and the actual value of the drying temperature, to obtain the transfer function between the cut tobacco mass change rate error and the drying temperature error:

[0108]

[0109] Step 7) Use the transfer function G(S) to establish a drying temperature control system for the cut tobacco mass change rate as Figure 8 shown.

[0110] The drying temperature is 186.256 °C, the drying time is 8.6 min, and the actual value control curve when the preset value of the cut tobacco mass change rate drying temperature control system is 90.66% is shown in Figure 9 . During the production process of heated cigarettes, by adopting the above cut tobacco mass change rate, the actual value of the cut tobacco mass change rate after drying can reach the control preset value within 5 s, realizing the stable control of the mass change rate during the cut tobacco drying process. This system has no overshoot, and solves the problem of glycerol quality fluctuation caused by too large or too small drying intensity at the production line site.

[0111] The technical solution provided by the embodiment of the present invention determines a unary prediction equation according to the preset value of the cut tobacco drying temperature and the preset binary prediction equation; determines the target transfer function according to the preset value of the cut tobacco drying time and the unary prediction equation; constructs a drying temperature control system according to the target transfer function and the preset value of the cut tobacco mass change rate; so that the drying temperature control system controls the temperature parameters of the preset cut tobacco dryer to complete the drying process of the target cut tobacco. The technical solution of the embodiment of the present invention solves the problem that in the prior art, during the cut tobacco processing process, it is easy to have too large or too small drying intensity, and can autonomously adjust the parameters during the cut tobacco drying process based on the drying temperature control system, improving the stability of the cut tobacco drying process.

[0112] Figure 10 FIG. is a schematic structural diagram of a cut tobacco drying control device provided by an embodiment of the present invention. The embodiment of the present invention is applicable to the scenario of heating and drying cut tobacco. This device can be implemented in the form of software and / or hardware and integrated in a computer device with application development functions.

[0113] As Figure 10 shown, the cut tobacco drying control device includes: a transfer function determination module 310, a control system construction module 320, and a cut tobacco processing module 330.

[0114] Among them, the transfer function determination module 310 is configured to determine a target transfer function according to a preset value of cut tobacco drying temperature and a preset value of cut tobacco drying time; wherein, the target transfer function is a transfer function between the error of cut tobacco mass change rate and the error of drying temperature; the cut tobacco mass change rate is the change rate of the mass of the cut tobacco after drying relative to the mass of the cut tobacco before drying; the control system construction module 320 is configured to construct a drying temperature control system according to the target transfer function and the preset value of cut tobacco mass change rate; wherein, the drying temperature control system includes a PID controller; the cut tobacco processing module 330 is configured to control the temperature parameter of a preset cut tobacco dryer by using the drying temperature control system to complete the processing process of drying the target cut tobacco.

[0115] The technical solution provided by the embodiment of the present invention determines a target transfer function according to a preset value of cut tobacco drying temperature and a preset value of cut tobacco drying time; wherein, the target transfer function is a transfer function between the error of cut tobacco mass change rate and the error of drying temperature; the cut tobacco mass change rate is the change rate of the mass of the cut tobacco after drying relative to the mass of the cut tobacco before drying; constructs a drying temperature control system according to the target transfer function and the preset value of cut tobacco mass change rate; wherein, the drying temperature control system includes a PID controller; and controls the temperature parameter of a preset cut tobacco dryer by using the drying temperature control system to complete the processing process of drying the target cut tobacco. The technical solution of the embodiment of the present invention solves the problem that in the prior art, during the cut tobacco processing process, the drying intensity is likely to be too large or too small, and can autonomously adjust the parameters during the cut tobacco drying process based on the drying temperature control system, improving the stability of the cut tobacco drying process.

[0116] In an optional implementation manner, the transfer function determination module 310 is specifically configured to: determine a unary prediction equation according to the preset value of cut tobacco drying temperature and a preset binary prediction equation; wherein, the independent variables of the preset binary prediction equation are cut tobacco drying temperature and cut tobacco drying time, and the dependent variable is the cut tobacco mass change rate; the unary prediction equation is an equation of the cut tobacco mass change rate with respect to the cut tobacco drying time; and determine the target transfer function according to the preset value of cut tobacco drying time and the unary prediction equation.

[0117] In an optional implementation manner, the transfer function determination module 310 includes: a target transfer function determination unit configured to: take the derivative of the unary prediction equation to obtain a derivative equation corresponding to the unary prediction equation; substitute the preset value of cut tobacco drying time into the derivative equation to obtain a target error value, and use the reciprocal of the target error value as the target transfer function.

[0118] In an alternative embodiment, the cut tobacco drying control device further includes: a gain parameter determination module, configured to: determine the determination coefficients corresponding to different gains of the PID controller according to the preset cut tobacco drying temperature value, the preset cut tobacco drying time value, and the preset cut tobacco mass change rate value; and determine the target proportional gain and the target integral gain of the PID controller according to the determination coefficients corresponding to different gains.

[0119] In an alternative embodiment, the preset binary prediction equation is:

[0120]

[0121] where z(x, y) is the predicted value of the cut tobacco mass change rate fraction; k1 - k15 are the fitting parameters of the preset binary prediction equation; x is the cut tobacco drying temperature; y is the cut tobacco drying time; m is 0 or 4, and n is 0 or 3.

[0122] In an alternative embodiment, the target quantity of the drying temperature control system is the preset cut tobacco mass change rate value, and the controlled object of the drying temperature control system is the preset cut tobacco dryer.

[0123] In an alternative embodiment, the cut tobacco drying control device further includes: a drying deviation analysis module, configured to: obtain the mass of the target cut tobacco after drying, determine the actual cut tobacco mass change rate according to the mass of the target cut tobacco after drying and the mass of the target cut tobacco before drying; and determine the drying deviation parameter according to the actual cut tobacco mass change rate and the preset cut tobacco mass change rate value.

[0124] The cut tobacco drying control device provided by the embodiments of the present invention can execute the cut tobacco drying control method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0125] Figure 11 It is a schematic structural diagram of a computer device provided by an embodiment of the present invention. Figure 11 It shows a block diagram of an exemplary computer device 12 suitable for implementing the embodiments of the present invention. Figure 11 The shown computer device 12 is only an example and should not impose any limitation on the functions and usage scope of the embodiments of the present invention. The computer device 12 can be any terminal device with computing capabilities and can be configured in the cut tobacco drying control device.

[0126] As Figure 11 shown, the computer device 12 is presented in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 connecting different system components (including the system memory 28 and the processing unit 16).

[0127] The bus 18 can be one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor bus, or a local bus using any of a variety of bus structures. By way of example, such architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, Enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.

[0128] The computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the computer device 12, including both volatile and nonvolatile media, removable and non-removable media.

[0129] The system memory 28 can include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache 32. The computer device 12 can further include other removable / non-removable, volatile / nonvolatile computer system storage media. By way of example only, a storage system 34 can be provided for reading from and writing to non-removable, nonvolatile magnetic media ( Figure 11 not shown, typically called a "hard disk drive"). Although Figure 11 not shown in the figure, a disk drive for reading from and writing to a removable nonvolatile disk (e.g., a "floppy disk"), and an optical disk drive for reading from and writing to a removable nonvolatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical media) can be provided. In these instances, each drive can be connected to the bus 18 by one or more data media interfaces. The system memory 28 can include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of the embodiments of the present invention.

[0130] A program / utility 40 having a set (at least one) of program modules 42 can be stored, for example, in the system memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may include an implementation of a network environment. The program modules 42 generally carry out the functions and / or methods of the embodiments described herein.

[0131] The computer device 12 can also communicate with one or more external devices 14 (such as a keyboard, a pointing device, a display 24, etc.), and can also communicate with one or more devices that enable a user to interact with the computer device 12, and / or communicate with any device that enables the computer device 12 to communicate with one or more other computing devices (such as a network card, a modem, etc.). Such communication can be carried out through the input / output (I / O) interface 22. Moreover, the computer device 12 can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through the network adapter 20. As Figure 11 shown, the network adapter 20 communicates with other modules of the computer device 12 through the bus 18. It should be understood that although Figure 11 not shown in the figure, other hardware and / or software modules can be used in combination with the computer device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0132] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28. For example, it implements the cut tobacco drying control method provided by the embodiments of the present invention. The method includes:

[0133] Determining a target transfer function according to the preset value of the cut tobacco drying temperature and the preset value of the cut tobacco drying time; wherein, the target transfer function is the transfer function between the error of the cut tobacco mass change rate and the drying temperature error; the cut tobacco mass change rate is the change rate of the mass of the cut tobacco after drying relative to the mass of the cut tobacco before drying; constructing a drying temperature control system according to the target transfer function and the preset value of the cut tobacco mass change rate; wherein, the drying temperature control system includes a PID controller; so that the drying temperature control system controls the temperature parameters of the preset cut tobacco dryer to complete the processing process of drying the target cut tobacco.

[0134] This embodiment provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements the cut tobacco drying control method provided by any embodiment of the present invention, including:

[0135] Determine the target transfer function according to the preset value of the cut tobacco drying temperature and the preset value of the cut tobacco drying time; wherein, the target transfer function is the transfer function between the error of the cut tobacco mass change rate and the drying temperature error; the cut tobacco mass change rate is the change rate of the mass of the dried cut tobacco relative to the mass of the cut tobacco before drying; construct a drying temperature control system according to the target transfer function and the preset value of the cut tobacco mass change rate; wherein, the drying temperature control system includes a PID controller; so that the drying temperature control system controls the temperature parameters of the preset cut tobacco dryer to complete the processing process of drying the target cut tobacco.

[0136] The computer storage medium of the embodiment of the present invention can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (non-exhaustive list) of the computer-readable storage medium include: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, the computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, apparatus, or device.

[0137] The computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries the computer-readable program code. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium can also be any computer-readable medium other than the computer-readable storage medium, and this computer-readable medium can send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device.

[0138] The program code included on the computer-readable medium can be transmitted by any suitable medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0139] Computer program code for performing the operations of the present invention may be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or it may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0140] Those of ordinary skill in the art should understand that the various modules or steps of the present invention described above can be implemented using a general-purpose computing device. They can be centralized on a single computing device or distributed over a network composed of multiple computing devices. Optionally, they can be implemented using program code executable by a computer device, so that they can be stored in a storage device and executed by the computing device, or they can be separately fabricated into individual integrated circuit modules, or multiple modules or steps among them can be fabricated into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0141] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, it may also include more other equivalent embodiments, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for controlling the drying of cut tobacco, characterized in that, Including: Determine a target transfer function according to a preset value of cut tobacco drying temperature and a preset value of cut tobacco drying time; wherein, the target transfer function is a transfer function between the error of cut tobacco mass change rate and the error of drying temperature; the cut tobacco mass change rate is the change rate of the mass of the dried cut tobacco relative to the mass of the cut tobacco before drying; Construct a drying temperature control system according to the target transfer function and a preset value of cut tobacco mass change rate; wherein, the drying temperature control system includes a PID controller; So that the drying temperature control system controls the temperature parameters of a preset cut tobacco dryer to complete the processing process of drying the target cut tobacco.

2. The method according to claim 1, characterized in that, The determining the target transfer function according to the preset value of cut tobacco drying temperature and the preset value of cut tobacco drying time includes: Determine a unary prediction equation according to the preset value of cut tobacco drying temperature and a preset binary prediction equation; wherein, the independent variables of the preset binary prediction equation are cut tobacco drying temperature and cut tobacco drying time, and the dependent variable is cut tobacco mass change rate; the unary prediction equation is an equation of cut tobacco mass change rate with respect to cut tobacco drying time; Determine the target transfer function according to the preset value of cut tobacco drying time and the unary prediction equation.

3. The method according to claim 2, wherein The determining the target transfer function according to the preset value of cut tobacco drying time and the unary prediction equation includes: Derive the unary prediction equation to obtain a derivative equation corresponding to the unary prediction equation; Substitute the preset value of cut tobacco drying time into the derivative equation to obtain a target error value, and take the reciprocal of the target error value as the target transfer function.

4. The method according to claim 1, characterized in that The method further includes: Determine the determination coefficients corresponding to different gains of the PID controller according to the preset value of cut tobacco drying temperature, the preset value of cut tobacco drying time and the preset value of cut tobacco mass change rate; Determine the target proportional gain and the target integral gain of the PID controller according to the determination coefficients corresponding to different gains.

5. The method according to claim 2, wherein The preset binary prediction equation is: Wherein, z(x,y) is the predicted value of cut tobacco mass change rate; k1-k15 are the fitting parameters of the preset binary prediction equation; x is the cut tobacco drying temperature; y is the cut tobacco drying time; m is 0 or 4, and n is 0 or 3.

6. The method according to claim 1, characterized in that, The target quantity of the drying temperature control system is the preset value of cut tobacco mass change rate, and the controlled object of the drying temperature control system is the preset cut tobacco dryer.

7. The method according to claim 1, wherein The method further includes: Obtain the mass of the target cut tobacco after drying, and determine the actual cut tobacco mass change rate according to the mass of the target cut tobacco after drying and the mass of the target cut tobacco before drying; Determine a drying deviation parameter according to the actual cut tobacco mass change rate and the preset value of cut tobacco mass change rate.

8. A cut tobacco drying control device, characterized in that The device includes: A transfer function determination module, configured to determine a target transfer function according to a preset value of cut tobacco drying temperature and a preset value of cut tobacco drying time; wherein, the target transfer function is a transfer function between the error of cut tobacco mass change rate and the error of drying temperature; the cut tobacco mass change rate is the change rate of the mass of the dried cut tobacco relative to the mass of the cut tobacco before drying; A control system construction module, configured to construct a drying temperature control system according to the target transfer function and the preset value of the mass change rate of cut tobacco; wherein, the drying temperature control system includes a PID controller; A cut tobacco processing module, configured to enable the drying temperature control system to control the temperature parameters of a preset cut tobacco dryer, and complete the processing of drying the target cut tobacco.

9. A computer device, characterized in that, The computer device includes: One or more processors; A memory, configured to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the cut tobacco drying control method according to any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the cut tobacco drying control method according to any one of claims 1-7.

Images