Method and system for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves

Abstract

The embodiment of the present specification provides a method and system for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves, wherein the method comprises: taking an appropriate amount of tobacco leaves or reconstituted tobacco leaves samples at a temperature of C 1 , relative humidity %RH 1 The sample is stored in an environment until it reaches equilibrium state, and the sample mass is weighed and recorded as M 0 ; Change the ambient temperature and humidity to temperature C 2 , relative humidity %RH 2 , start timing Tn, initial value T 0 =0; weigh and record the sample mass Mn at regular intervals, where n is the weighing times number, and record the cumulative time Tn during the test until the sample reaches a balanced state again; calculate the cumulative change in the sample mass per unit mass based on each weighing record, and characterize the moisture absorption or desorption performance of the sample by the cumulative change in the sample mass.

Description

Technical Field

[0001] This document relates to the technical field of tobacco leaf and reconstituted tobacco leaf moisture absorption and release detection, and specifically to a method and system for characterizing the moisture absorption and release performance of tobacco leaf and reconstituted tobacco leaf. Background Art

[0002] Reconstituted tobacco is a sheet or filament-shaped recycled product made from tobacco waste materials such as tobacco chips, cigarette dust, stems, and tobacco stems in the cigarette making process. It is used as a cigarette filler, which can reduce the cost of cigarettes and improve the intrinsic quality of cigarettes. There are differences in the moisture absorption and desorption properties of reconstituted tobacco and natural tobacco, which have a negative impact on the stable control of quality during cigarette processing. The study and regulation of the moisture absorption and desorption properties of reconstituted tobacco requires a quantitative characterization method. At present, the study of moisture absorption and desorption of reconstituted tobacco leaves mostly uses equilibrium moisture content as a characterization indicator. The moisture content is mostly detected by the oven method. The samples cannot be measured repeatedly, and it is difficult to study the dynamic changes of moisture adsorption and desorption. Near-infrared, microwave, low-field nuclear magnetic resonance and other technologies can be used to measure tobacco moisture content, but the model construction is relatively complex. Summary of the invention

[0003] One or more embodiments of this specification provide a method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves, including:

[0004] Take an appropriate amount of tobacco leaf or reconstituted tobacco leaf sample and store it in an environment of temperature C1 and relative humidity %RH1 until it reaches equilibrium state. Weigh the sample mass and record it as M0;

[0005] Change the ambient temperature and humidity to temperature C2 and relative humidity %RH2, start timing Tn, and the initial value T0 = 0;

[0006] The sample mass Mn is weighed and recorded at intervals, where n is the weighing times, and the cumulative time Tn during the test is recorded until the sample reaches a balanced state again;

[0007] The cumulative change in the mass of the sample per unit mass is calculated based on each weighing record, and the moisture absorption or desorption performance of the sample is characterized by the cumulative change in the sample mass.

[0008] Furthermore, when the sample mass Mn is weighed and recorded, the weighing frequency is increased during the time period when the mass change is higher than the preset threshold, and the weighing frequency is reduced during the time period when the mass change is lower than the preset threshold.

[0009] Furthermore, the specific method for calculating the cumulative change in the mass of the unit mass sample based on each weighing record is:

[0010] Ym=(Mn-M0) / M0;

[0011] Ym is the cumulative change in sample mass per unit mass.

[0012] Furthermore, the method further comprises:

[0013] A line graph is obtained with the cumulative time length Tn as the horizontal axis and the cumulative change in sample mass per unit mass Ym as the vertical axis. A function whose graph is close to the line graph is selected for fitting operation. The function with the best fitting effect is selected as the moisture absorption / desorption curve function to characterize the moisture absorption or desorption performance of the sample.

[0014] Furthermore, the method further comprises:

[0015] The moisture absorption / desorption curve function obtained after fitting calculation is as follows:

[0016] Ym=Theta1*Tn / (Theta2+Tn);

[0017] The moisture absorption / desorption rate function is obtained by taking the first-order derivative of the moisture absorption / desorption curve function, specifically:

[0018] Ym′=Theta1*Theta2 / (Theta2+Tn)^2;

[0019] Where Theta is a constant and Ym′ is the cumulative change in mass per unit mass sample per unit time.

[0020] Furthermore, the specific method for characterizing the hygroscopic properties of the sample by the cumulative change in sample mass is as follows:

[0021] The sample takes the equilibrium state under the conditions of temperature C1 and relative humidity %RH1 as the initial value, and takes the temperature C2 and relative humidity %RH2 as the storage condition. The integral value of the accumulated time interval [Tx, Tmax] of the moisture absorption curve obtained is the maximum moisture absorption change of the sample, which represents the moisture absorption potential of the sample under the set conditions;

[0022] The sample takes the equilibrium state under the conditions of temperature C1 and relative humidity %RH1 as the initial value, and takes the temperature C2 and relative humidity %RH2 as the storage conditions. The integral value of the accumulated time interval [0, Tx] of the moisture absorption rate curve obtained is the total moisture absorption rate of the sample, which characterizes the moisture absorption speed of the sample under the set conditions.

[0023] Among them, Tx is the cumulative time when the sample reaches equilibrium.

[0024] Furthermore, the specific method for characterizing the moisture release performance of the sample by the cumulative change in sample mass is as follows:

[0025] The sample takes the equilibrium state at temperature C2 and relative humidity %RH2 as the initial value, and takes temperature C1 and relative humidity %RH1 as the storage condition. The integral value of the cumulative duration [Tx, Tmax] interval of the dehumidification curve obtained is the maximum dehumidification change of the sample, which represents the dehumidification potential of the sample under the set conditions.

[0026] The sample takes the equilibrium state under the conditions of temperature C2 and relative humidity %RH2 as the initial value and the temperature C1 and relative humidity %RH1 as the storage conditions to obtain the dehumidification rate curve. The integral value of the cumulative time interval [0, Tx] is the total dehumidification rate of the sample, which characterizes the dehumidification speed of the sample under the set conditions.

[0027] One or more embodiments of this specification provide a system for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves, including:

[0028] Sample preparation module: used to take an appropriate amount of tobacco leaf or reconstituted tobacco leaf sample and store it in an environment of temperature C1 and relative humidity %RH1 until it reaches a balanced state, and weigh the sample mass and record it as M0;

[0029] Condition setting module: used to change the ambient temperature and humidity to temperature C2, relative humidity %RH2, start timing Tn, initial value T0 = 0;

[0030] Data recording module: used to weigh and record the sample mass Mn at intervals, where n is the weighing times number, and to record the cumulative time Tn during the test until the sample reaches a balanced state again;

[0031] Performance characterization module: used to calculate the cumulative change in mass of the unit mass sample based on each weighing record, and to characterize the moisture absorption or desorption performance of the sample through the cumulative change in sample mass.

[0032] One or more embodiments of the present specification provide an electronic device, including:

[0033] processor; and,

[0034] A memory arranged to store computer executable instructions, which, when executed, cause the processor to implement the steps of the above-mentioned method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves.

[0035] One or more embodiments of the present specification provide a storage medium for storing computer-executable instructions, which, when executed, implement the steps of the above-mentioned method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves.

[0036] By adopting the embodiment of the present invention, quality detection is used instead of moisture content detection, the dynamic changes of moisture adsorption and desorption in the moisture absorption and desorption process are analyzed, and the moisture absorption and desorption performance of the sample is characterized. It has the advantages of simple operation, rapidity and accuracy, convenience and high efficiency, and wide applicability.

[0037] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 A flow chart of a method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves provided in one or more embodiments of this specification;

[0040] Figure 2 A schematic diagram of a moisture absorption curve fitting line of a method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves provided in one or more embodiments of this specification, wherein the horizontal axis is the cumulative time min, and the vertical axis is the unit mass increase value g / g;

[0041] Figure 3 A schematic diagram of a dehumidification curve fitting line of a method for characterizing the moisture absorption and dehumidification performance of tobacco leaves and reconstituted tobacco leaves provided in one or more embodiments of this specification, wherein the horizontal axis is the cumulative time min, and the vertical axis is the unit mass reduction value g / g;

[0042] Figure 4 A schematic diagram of a moisture absorption rate curve of a method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves provided in one or more embodiments of this specification, wherein the horizontal axis is the cumulative time min, and the vertical axis is the unit mass increase value per unit time g / (g*min);

[0043] Figure 5 A schematic diagram of a moisture release rate curve for a method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves provided in one or more embodiments of this specification, wherein the horizontal axis is the cumulative time min, and the vertical axis is the unit mass reduction value per unit time g / (g*min);

[0044] Figure 6A schematic diagram of the composition of a system for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves provided in one or more embodiments of this specification;

[0045] Figure 7 A schematic diagram of the structure of an electronic device provided for one or more embodiments of this specification. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the following will be combined with the drawings in one or more embodiments of this specification to clearly and completely describe the technical solutions in one or more embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this document.

[0047] Method Embodiment

[0048] According to an embodiment of the present invention, a method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves is provided. Figure 1 A flow chart of a method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves provided in one or more embodiments of this specification, such as Figure 1 As shown, the method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves according to the embodiment of the present invention specifically includes:

[0049] S1. Take an appropriate amount of tobacco leaf or reconstituted tobacco leaf sample and store it at a temperature of C1 and a relative humidity of %RH1 until it reaches a equilibrium state. Weigh the sample mass and record it as M0.

[0050] Place an appropriate amount of tobacco or reconstituted tobacco samples in a constant temperature and humidity device set at temperature C1 and relative humidity %RH1, and place them for several hours to reach a state of equilibrium, wherein the equilibrium state refers to the stable state of the morphology and moisture content of the reconstituted tobacco leaves. After the equilibrium is completed, weigh the sample mass and record it as M0 or retain the sample mass of M0.

[0051] S2. Change the ambient temperature and humidity to temperature C2 and relative humidity %RH2, start timing Tn, and the initial value T0=0.

[0052] Change the ambient temperature and humidity by changing the settings of the constant temperature and humidity equipment, set the constant temperature and humidity equipment to temperature C2 and relative humidity %RH2, start timing Tn, record the initial value T0=0, start timing in minutes, and check the quality at the set time intervals.

[0053] S3. Weigh and record the sample mass Mn at regular intervals, where n is the number of weighings, and record the cumulative duration Tn of the test until the sample reaches a state of equilibrium again.

[0054] Weigh the sample mass Mn at a certain interval, and record the cumulative duration Tn of this test, where n is the test number, n=1,2,3...,x,...max, where x represents the number of tests when the sample reaches equilibrium, and max represents the number of the last test when the sample reaches equilibrium. When weighing the sample mass at the preset time interval, increase the weighing frequency when the mass changes faster, and reduce the weighing frequency when the mass changes slower.

[0055] S4. Calculate the cumulative change in the mass of the sample per unit mass based on each weighing record, and characterize the moisture absorption or desorption performance of the sample through the cumulative change in the sample mass.

[0056] The specific method for calculating the cumulative change in mass of the unit mass sample based on each weighing record is:

[0057] Ym=(Mn-M0) / M0;

[0058] Ym is the cumulative change in sample mass per unit mass.

[0059] A line graph is obtained with the cumulative time length Tn as the horizontal axis and the cumulative change in sample mass per unit mass Ym as the vertical axis. A function whose graph is close to the line graph is selected for fitting operation. The function with the best fitting effect is selected as the moisture absorption / desorption curve function to characterize the moisture absorption or desorption performance of the sample.

[0060] In this embodiment, the moisture absorption / release curve function obtained after fitting calculation is as follows:

[0061] Ym=Theta1*Tn / (Theta2+Tn);

[0062] The moisture absorption / desorption rate function is obtained by taking the first-order derivative of the moisture absorption / desorption curve function, specifically:

[0063] Ym′=Theta1*Theta2 / (Theta2+Tn)^2;

[0064] Among them, Theta is a constant, and Ym′ is the cumulative change in mass of a unit mass sample per unit time.

[0065] The specific method for characterizing the hygroscopic properties of the sample by the cumulative change in sample mass is as follows:

[0066] The sample takes the equilibrium state under the conditions of temperature C1 and relative humidity %RH1 as the initial value and the temperature C2 and relative humidity %RH2 as the storage condition. The integral value of the cumulative time interval [Tx, Tmax] of the moisture absorption curve obtained is the maximum moisture absorption change of the sample, which characterizes the moisture absorption potential of the sample under the set conditions.

[0067] The sample takes the equilibrium state under the conditions of temperature C1 and relative humidity %RH1 as the initial value, and takes the temperature C2 and relative humidity %RH2 as the storage conditions. The integral value of the accumulated time interval [0, Tx] of the moisture absorption rate curve obtained is the total moisture absorption rate of the sample, which characterizes the moisture absorption speed of the sample under the set conditions.

[0068] Among them, Tx is the cumulative time when the sample reaches equilibrium.

[0069] The specific method for characterizing the moisture release performance of the sample by the cumulative change in sample mass is as follows:

[0070] The sample takes the equilibrium state under the conditions of temperature C2 and relative humidity %RH2 as the initial value and the temperature C1 and relative humidity %RH1 as the storage condition. The integral value of the cumulative time interval [Tx, Tmax] of the dehumidification curve obtained is the maximum dehumidification change of the sample, which characterizes the dehumidification potential of the sample under the set conditions.

[0071] The sample takes the equilibrium state under the conditions of temperature C2 and relative humidity %RH2 as the initial value and the temperature C1 and relative humidity %RH1 as the storage conditions to obtain the dehumidification rate curve. The integral value of the cumulative time interval [0, Tx] is the total dehumidification rate of the sample, which characterizes the dehumidification speed of the sample under the set conditions.

[0072] The present invention is further described in detail below in conjunction with specific embodiments:

[0073] Hygroscopic process:

[0074] Take about 15g of reconstituted tobacco leaf sample and spread it flat on a tray. Place the tray in a constant temperature and humidity chamber, set the temperature to 25℃, the humidity to 50%, and balance for 42h. After the balance is completed, the mass of the tray sample is accurately retained at 10.00g.

[0075] The constant temperature and humidity box is set at 25°C and 75% humidity. The timing is started and the quality is tested at the set time intervals.

[0076] Dehumidification process:

[0077] Take about 15g of the same batch of reconstituted tobacco leaf samples and spread them flat on a tray. The tray is placed in a constant temperature and humidity chamber, set at 25°C and 75% humidity, and balanced for 42 hours. After the balance is completed, the mass of the tray sample is accurately retained at 10.00g;

[0078] The constant temperature and humidity box is set at 25°C and 50% humidity. The timing is started and the quality is tested at the set time intervals.

[0079] The test data is shown in Table 1:

[0080] Table 1

[0081]

[0082] Calculation of maximum moisture absorption change:

[0083] The schematic diagram of the moisture absorption curve fitting line is as follows Figure 2 As shown, the moisture absorption curve function is Y=Theta1*Tn / (Theta2+Tn), with the cumulative time as the prediction variable and the unit mass increase in the moisture absorption process as the response variable. The Theta constant value is fitted and the moisture absorption curve function is obtained as Y=0.107304*Tn / (60.8536+Tn). The integral value of the cumulative time from 1200 to 1600 minutes is calculated, and the result is 41.1224, which is the maximum moisture absorption change.

[0084] Calculation of total moisture absorption rate:

[0085] The moisture absorption rate curve is as follows Figure 4 As shown, the specific calculation method is to substitute the Theta constant value obtained from the moisture absorption curve function into the moisture absorption rate curve function Y′=Theta1*Theta2 / (Theta2+Tn)^2, and obtain Y=0.107304*60.8536 / (60.8536+Tn)^2, and calculate the integral value of the cumulative time from 0 to 1200 minutes, and obtain 0.1021, which is the total moisture absorption rate.

[0086] Calculation of maximum moisture release change:

[0087] The schematic diagram of the dehumidification curve fitting line is as follows Figure 3 As shown, the dehumidification curve function is Y=Theta1*Tn / (Theta2+Tn), with the cumulative time as the prediction variable and the unit mass reduction value in the dehumidification process as the response variable. The value of the Theta constant is fitted, and the dehumidification curve function Y=0.104461*Tn / (125.548+Tn) is obtained. The integral value of the cumulative time from 1200 to 1600 minutes is calculated, and the result is 38.3258, which is the maximum dehumidification change.

[0088] Calculation of total moisture release rate:

[0089] Dehumidification rate curve Figure 5As shown, the specific calculation method is to substitute the Theta constant value obtained from the moisture release curve function into the moisture release rate curve Y′=Theta1*Theta2 / (Theta2+Tn)^2, and obtain Y=0.104461*125.548 / (125.548+Tn)^2, and calculate the integral value of the cumulative time from 0 to 1200 minutes, and obtain 0.0946, which is the total moisture release rate.

[0090] The maximum moisture absorption change is used to evaluate the moisture absorption potential of the sample, and the total moisture absorption rate is used to evaluate the moisture absorption speed of the sample. The moisture absorption potential and moisture absorption speed are used to characterize the moisture absorption performance.

[0091] The maximum dehumidification change is used to evaluate the dehumidification potential of the sample, and the total dehumidification rate is used to evaluate the dehumidification speed of the sample. The dehumidification potential and dehumidification speed are used to characterize the dehumidification performance.

[0092] The beneficial effects of the present invention are as follows:

[0093] The present invention replaces moisture content detection with quality detection, analyzes the dynamic changes of moisture adsorption and desorption in the moisture absorption and desorption process, and characterizes the moisture absorption and desorption performance of the sample. It has the advantages of simple operation, rapidity and accuracy, convenience and high efficiency, and wide applicability.

[0094] System Example

[0095] According to an embodiment of the present invention, a characterization system for the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves is provided. Figure 6 A schematic diagram of a tobacco leaf and reconstituted tobacco leaf moisture absorption and release performance characterization system provided in one or more embodiments of this specification, such as Figure 6 As shown, the characterization system for the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves according to the embodiment of the present invention specifically includes:

[0096] Sample preparation module 60: used to take an appropriate amount of tobacco leaf or reconstituted tobacco leaf sample and store it in an environment of temperature C1 and relative humidity %RH1 until it reaches a balanced state, and weigh the sample mass and record it as M0;

[0097] Condition setting module 62: used to change the ambient temperature and humidity to temperature C2, relative humidity %RH2, start timing Tn, initial value T0=0;

[0098] Data recording module 64: used to weigh and record the sample mass Mn at intervals, where n is the weighing times number, and record the cumulative time Tn during the test until the sample reaches a balanced state again;

[0099] Performance characterization module 66: used to calculate the cumulative change in mass of the sample per unit mass based on each weighing record, and characterize the moisture absorption or desorption performance of the sample through the cumulative change in the sample mass.

[0100] The embodiment of the present invention is a system embodiment corresponding to the above-mentioned method embodiment. The specific operations of each module can be understood by referring to the description of the method embodiment, which will not be repeated here.

[0101] Device Example 1

[0102] An embodiment of the present invention provides an electronic device, such as Figure 7 As shown, it includes: a memory 70, a processor 72, and a computer program stored in the memory 70 and executable on the processor 72. When the computer program is executed by the processor 72, the following method steps are implemented:

[0103] S1. Take an appropriate amount of tobacco or reconstituted tobacco sample and store it at a temperature of C1 and a relative humidity of %RH1 until it reaches equilibrium. Weigh the sample mass and record it as M0;

[0104] S2. Change the ambient temperature and humidity to temperature C2, relative humidity %RH2, start timing Tn, initial value T0 = 0;

[0105] S3. Weigh and record the sample mass Mn at intervals, where n is the weighing number, and record the cumulative time Tn during the test until the sample reaches equilibrium again;

[0106] S4. Calculate the cumulative change in the mass of the sample per unit mass based on each weighing record, and characterize the moisture absorption or desorption performance of the sample through the cumulative change in the sample mass.

[0107] Device Example 2

[0108] An embodiment of the present invention provides a computer-readable storage medium, on which a program for implementing information transmission is stored. When the program is executed by the processor 72, the following method steps are implemented:

[0109] S1. Take an appropriate amount of tobacco and reconstituted tobacco samples and store them at a temperature of C1 and a relative humidity of %RH1 until they reach equilibrium. Weigh the sample mass and record it as M0;

[0110] S2. Change the ambient temperature and humidity to temperature C2, relative humidity %RH2, start timing Tn, initial value T0 = 0;

[0111] S3. Weigh and record the sample mass Mn at intervals, where n is the weighing number, and record the cumulative time Tn during the test until the sample reaches equilibrium again;

[0112] S4. Calculate the cumulative change in the mass of the sample per unit mass based on each weighing record, and characterize the moisture absorption or desorption performance of the sample through the cumulative change in the sample mass.

[0113] The computer-readable storage medium in this embodiment includes, but is not limited to, ROM, RAM, magnetic disk or optical disk, etc.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves, characterized in that: include: Take an appropriate amount of tobacco leaf or reconstituted tobacco leaf sample and store it in an environment of temperature C1 and relative humidity %RH1 until it reaches equilibrium state, weigh the sample mass and record it as M0; Change the ambient temperature and humidity to temperature C2 and relative humidity %RH2, start timing Tn, and the initial value T0 = 0; The sample mass Mn is weighed and recorded at intervals, where n is the weighing times, and the cumulative time Tn during the test is recorded until the sample reaches a balanced state again; The cumulative change in the mass of the sample per unit mass is calculated based on each weighing record, and the moisture absorption or desorption performance of the sample is characterized by the cumulative change in the sample mass.

2. The method according to claim 1, characterized in that When weighing and recording the sample mass Mn, the weighing frequency is increased during the time period when the mass change is higher than the preset threshold, and the weighing frequency is reduced during the time period when the mass change is lower than the preset threshold.

3. The method according to claim 1, characterized in that The specific method for calculating the cumulative change in mass of the unit mass sample based on each weighing record is: Ym=(Mn-M0) / M0; Ym is the cumulative change in sample mass per unit mass.

4. The method according to claim 3, characterized in that The method further comprises: A line graph is obtained with the cumulative time length Tn as the horizontal axis and the cumulative change in sample mass per unit mass Ym as the vertical axis. A function whose graph is close to the line graph is selected for fitting operation. The function with the best fitting effect is selected as the moisture absorption / desorption curve function to characterize the moisture absorption or desorption performance of the sample.

5. The method according to claim 4, characterized in that The method further comprises: The moisture absorption / desorption curve function obtained after fitting calculation is as follows: Ym=Theta1*Tn / (Theta2+Tn); The moisture absorption / desorption rate function is obtained by taking the first-order derivative of the moisture absorption / desorption curve function, specifically: Ym′=Theta1*Theta2 / (Theta2+Tn)^2; Where Theta is a constant and Ym′ is the cumulative change in mass per unit mass sample per unit time.

6. The method according to claim 5, characterized in that The specific method for characterizing the hygroscopic properties of the sample by the cumulative change in sample mass is as follows: The sample takes the equilibrium state under the conditions of temperature C1 and relative humidity %RH1 as the initial value, and takes the temperature C2 and relative humidity %RH2 as the storage condition. The integral value of the accumulated time interval [Tx, Tmax] of the moisture absorption curve obtained is the maximum moisture absorption change of the sample, which represents the moisture absorption potential of the sample under the set conditions; The sample takes the equilibrium state under the conditions of temperature C1 and relative humidity %RH1 as the initial value, and takes the temperature C2 and relative humidity %RH2 as the storage conditions. The integral value of the accumulated time interval [0, Tx] of the moisture absorption rate curve obtained is the total moisture absorption rate of the sample, which characterizes the moisture absorption speed of the sample under the set conditions. Among them, Tx is the cumulative time when the sample reaches equilibrium.

7. The method according to claim 5, characterized in that The specific method for characterizing the moisture release performance of the sample by the cumulative change in sample mass is as follows: The sample takes the equilibrium state at temperature C2 and relative humidity %RH2 as the initial value, and takes temperature C1 and relative humidity %RH1 as the storage condition. The integral value of the cumulative duration [Tx, Tmax] interval of the dehumidification curve obtained is the maximum dehumidification change of the sample, which represents the dehumidification potential of the sample under the set conditions. The sample takes the equilibrium state under the conditions of temperature C2 and relative humidity %RH2 as the initial value and the temperature C1 and relative humidity %RH1 as the storage conditions to obtain the dehumidification rate curve. The integral value of the cumulative time interval [0, Tx] is the total dehumidification rate of the sample, which characterizes the dehumidification speed of the sample under the set conditions.

8. A characterization system for the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves, characterized in that: include: Sample preparation module: used to take an appropriate amount of tobacco leaf or reconstituted tobacco leaf sample and store it in an environment of temperature C1 and relative humidity %RH1 until it reaches a balanced state, and weigh the sample mass and record it as M0; Condition setting module: used to change the ambient temperature and humidity to temperature C2, relative humidity %RH2, start timing Tn, initial value T0 = 0; Data recording module: used to weigh and record the sample mass Mn at intervals, where n is the weighing times number, and to record the cumulative time Tn during the test until the sample reaches a balanced state again; Performance characterization module: used to calculate the cumulative change in mass of the unit mass sample based on each weighing record, and to characterize the moisture absorption or desorption performance of the sample through the cumulative change in sample mass.

9. An electronic device, characterized in that: include: processor; as well as, A memory arranged to store computer executable instructions, which, when executed, cause the processor to implement the steps of the method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves as described in any one of claims 1 to 7.

10. A storage medium, characterized in that: Used to store computer executable instructions, which, when executed, implement the steps of the method for characterizing the moisture absorption and release properties of tobacco leaves and reconstituted tobacco leaves as described in any one of claims 1 to 7.

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