Tobacco leaf threshing and sheet shape characteristics determination method and sheet shape control process determination method

Abstract

The method for determining tobacco leaf threshing and sheet shape characteristics and the method for determining sheet shape control technology, through steps S1-S7, through testing, sampling, and testing, calculates the qualified proportion under each test condition, tests and calculates the proportion of qualified samples, establishes auxiliary indicators E, constructs threshing characteristics Q, calculates tobacco leaf shape suitability P, and calculates the practicality F of sheet shape control technology; based on the conventional indicator detection data of the tobacco leaf threshing process, an evaluation function model for tobacco leaf threshing processing resistance and processing adaptability is established to achieve a comprehensive and objective evaluation of the actual threshing characteristics of tobacco leaves, which serves as a reference for setting and adjusting tobacco leaf processing parameters; based on the conventional indicator detection data of the tobacco leaf threshing process, a tobacco leaf shape structure suitability evaluation function model is established to achieve the evaluation of tobacco leaf shape suitability; the tobacco leaf shape control technology determination method can be expanded to evaluate the comprehensive practicality of different process technologies, thereby serving as a reference for tobacco leaf shape control process technology.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco leaf threshing and redrying, and in particular to a method for measuring tobacco leaf threshing characteristics and sheet shape characteristics, and also to an evaluation method for sheet shape control technology after application. Background Art

[0002] Threshing and re-baking is a process that connects tobacco planting and cigarette manufacturing. Threshing is the process of separating tobacco leaves from tobacco stems by mechanical means and wind power.

[0003] The quality requirements and technical indicators for the threshing process in the tobacco industry standards YC / T146-2010 "Technical Specifications for Threshing and Re-drying of Tobacco Leaves" and YC / T147-2010 "Quality Inspection of Threshed Tobacco Leaves" mainly include leaf structure (including large leaf rate, large and medium leaf rate, broken powder rate, etc.) and leaf stem rate. With the development of medium and thin cigarettes, the concept of threshing technology has gradually changed to "reducing large leaf rate, increasing medium leaf rate, controlling broken powder and removing stems". Reducing large leaf rate, increasing medium leaf rate, controlling broken powder and removing stems means: reducing large leaf rate, increasing medium leaf rate, controlling the ratio of broken powder to broken powder, and at the same time Effectively remove the stems in the leaves, and the control target of the tobacco leaf structure changes accordingly. For example, YC / T146-2010 requires that the large-piece rate (>25.4mm×25.4mm) of high-quality flue-cured tobacco should be ≥47%, while the 2016 Cigarette Process Specifications require it to be <45%; this is because in order to ensure the processing yield, a high large-piece rate is required, that is, the tobacco leaves should not be broken; a high large-piece rate means that the cut tobacco is long, but it is not conducive to the quality control of the newly developed medium and thin cigarette products, such as uneven blending and the generation of empty ends;

[0004] To achieve both high yield and high quality in the threshing process, the key is to find the threshing process, equipment, parameters, etc. that match the threshing characteristics of tobacco leaves. The threshing characteristics of tobacco leaves should include two aspects: one is the quality of threshing products under the best process and technical parameters, which is the processing resistance determined by the quality characteristics of the tobacco leaves themselves, similar to the so-called "processing resistance"; the other is the change in the quality of threshing products under different process and technical parameters, which is the "processing adaptability" of tobacco leaves to changes in external conditions. At present, most of the research on tobacco leaf threshing characteristics is aimed at "processing resistance", such as simple qualitative evaluation of tobacco leaves through mechanical property index data such as tension, penetration, shear force, adhesion, etc., which is used as the basis for process design and parameter setting (Chinese Patent 201110362709.2 A new process for threshing and redrying based on differences in tobacco leaf mechanical properties, Chinese Patent 201810424735.5 A pretreatment process method for threshing and redrying tobacco leaves based on tobacco leaf raw material characteristics), but these indicators are greatly affected by the moisture content and temperature of tobacco leaves, and the test sample is only a part of the whole tobacco leaf. , so the test results often cannot reflect the characteristics of the actual processing process; and there are not many reports on "processing adaptability". For example, the optimization of leaf structure, which is currently of great concern, can be achieved through adjusting the incoming tobacco leaf state and threshing parameters (Chinese Patent 2018110890436 A control method for threshing and redrying tobacco leaf structure), changing the frame specifications (Chinese Patent 2021204529005 A plum blossom-shaped threshing frame) and screening and reprocessing (Chinese Patent 2017108172052 A threshing and redrying processing method for simultaneously regulating tobacco leaf structure and stem content in leaves) and other means;

[0005] At present, there is no precise theoretical guidance for tobacco leaf agricultural product processing, and most of them still rely on manual experience. There are dozens of direct factors that affect leaf threshing, and the combinations are diverse, resulting in different processing intensities. If the processing intensity is high, the tobacco leaves will be severely broken, and the large and medium pieces rate (lower control limit) and the fragments and shreds rate (upper control limit) will not meet the standards. If the processing intensity is low, the tobacco leaves are not fully processed, and the large piece rate and the stem content rate in the leaves (upper control limit) will not meet the standards. However, each factor can have a two-way impact on the processing intensity, and the degree of impact on different tobacco leaves is also different. Therefore, it is necessary to construct a measurable tobacco leaf processing resistance.

[0006] However, there are few comparisons of the effects of various adjustment methods on tobacco leaves with different processing resistance. In addition, even for studies on individual tobacco leaves, the evaluation of the results only examines whether they are closer to the target requirements, and there is a lack of comprehensive evaluation methods to compare the effects of different treatment methods, which limits the realization of personalized processing of tobacco leaves. Summary of the invention

[0007] In view of this, the purpose of the present invention is to provide an evaluation method for tobacco leaf threshing characteristics and sheet shape control process effects, or a measurement method. This method constructs an evaluation function for tobacco leaf threshing characteristics and sheet shape control process effects based on the leaf structure and leaf stem content data detected during the processing process, and realizes the measurement of tobacco leaf processing characteristics and leaf structure optimization process effects under actual processing conditions, that is, the calculation of evaluation indicators.

[0008] The present application aims to solve one of the problems in the background technology.

[0009] The technical solution adopted by the present invention is: In order to achieve the above-mentioned purpose and other related purposes, the present invention provides a method for measuring tobacco leaf threshing characteristics, comprising the following steps:

[0010] Step S1, sampling and testing the tobacco leaves after threshing and de-stemming under each test condition;

[0011] Step S2, remove the sample data that does not meet the processing quality requirements, and calculate the proportion w of qualified samples under each test condition,

[0012] The qualified sample ratio w is calculated according to formula (1):

[0013] The formula (1) is:

[0014] In the formula, w i Indicates the proportion of qualified samples under the i-th test condition, N i represents the total number of samples collected under the i-th test condition, n i It represents the number of qualified samples remaining after removing unqualified samples under the i-th test condition;

[0015] Step S3, calculating the mean value of the detection index under each test condition for the qualified sample detection data obtained after S1 detection and S2 screening;

[0016] Step S4, calculating the tobacco threshing characteristic evaluation auxiliary index E according to the mean value of the detection index,

[0017] The auxiliary index E for evaluating tobacco leaf threshing characteristics is calculated according to formula (2):

[0018] The formula (2) is:

[0019] In the formula, E i YG represents the auxiliary index for evaluating tobacco leaf threshing characteristics under the i-th test condition; i represents the mean stem content of tobacco leaves under the ith test condition; SP i represents the mean value of the fragmentation rate of cigarettes under the i-th test condition; SM i represents the mean value of the cigarette fragmentation rate under the i-th test condition;

[0020] Step S5, calculating the tobacco leaf threshing characteristics Q according to the auxiliary index E; the tobacco leaf threshing characteristics Q include the processing resistance Q A And processing adaptability Q B ;

[0021] The processing resistance Q of the tobacco leaf threshing characteristics A According to formula (3),

[0022] The formula (3) is: Q A-m =max(E m1 ,E m2 ,…,E mn ),

[0023] In the formula, Q A-m Indicates the processing resistance of the leaf threshing characteristics of the mth type of tobacco leaves; E m1 ,E m2 ,…,E mn It indicates the evaluation auxiliary index of the mth tobacco leaf under the first, second, ... nth process test conditions; max indicates the maximum value;

[0024] Processing adaptability of tobacco leaf threshing characteristics B Calculate according to formula (4);

[0025] Formula (4) is: Q B-m =range(E m1 ,E m2 ,…,E mn ),

[0026] In the formula, Q B-m represents the processing adaptability of the tobacco threshing characteristics of the mth tobacco leaf; E m1 ,E m2 ,…,E mn It represents the auxiliary evaluation index of the mth type of tobacco under the first, second, ... nth process test conditions respectively; range represents the extreme value, that is, the difference between the maximum value and the minimum value.

[0027] A technical solution provided by this application also includes the following technical features:

[0028] Preferably, in step S1, the types of experimental conditions include, but are not limited to, comparison of different tobacco leaf types, comparison of different pretreatment types, and comparison of different leaf threshing process types.

[0029] Preferably, in step S1, the tobacco leaf types include, but are not limited to, different origins, grades, and composition ratios, or a combination of different types.

[0030] Preferably, in step S1, the pretreatment types include, but are not limited to, one or a combination of the treatment methods of selection, feeding, cutting, moisture conditioning and leaf moisturizing before threshing.

[0031] Preferably, in step S1, the pretreatment types include, but are not limited to, one or a combination of different treatment intensities of selection, feeding, cutting, moisture conditioning and leaf moisturizing before threshing.

[0032] Preferably, in step S1, the leaf beating process type includes that one element or a combination of elements of the leaf beating process is different.

[0033] Preferably, in step S1, the elements of the threshing process include, but are not limited to, the threshing process path, the threshing equipment type and the threshing equipment parameters.

[0034] Preferably, in step S1, the leaf beating process path is used to achieve a processing technology aimed at separating leaf stems or adjusting the structure of tobacco leaves.

[0035] Preferably, the threshing process path includes, but is not limited to, feeding and threshing, screening and re-threshing after threshing, and screening and shearing after threshing.

[0036] Preferably, in step S1, the types of leaf beating equipment include, but are not limited to, a feeder, a leaf beating machine, an air separator, a belt conveyor, a built-in frame, a fixed knife, a moving knife, a rotor, a throwing roller, and a vibrating screen.

[0037] Preferably, in step S1, the parameters of the beating equipment include, but are not limited to, the rotating speeds of the beating rollers of different beating units, the wind separation frequencies of different wind separation units, and the tobacco leaf flow rate.

[0038] Preferably, in step S1, the threshed and stemmed tobacco strips include threshed tobacco strips before redrying and / or redrying tobacco strips.

[0039] Preferably, in step S1, the tobacco leaves after threshing and de-stemming are tobacco leaves before re-roasting after threshing.

[0040] Preferably, in step S1, sampling is performed according to one or a combination of YC / T146 "Technical Specifications for Threshing and Re-drying of Tobacco Leaves" and YC / T147 "Quality Inspection of Threshed Tobacco Leaves".

[0041] Preferably, in step S1, the sampling frequency is performed according to the evaluation test requirements.

[0042] Preferably, in step S1, the sampling times are no less than 3 times under each test condition; generally, 3 valid data results are reliable; because S2 is to make a qualification judgment, in order to avoid accidental unqualified samples during the test process, it is recommended to take no less than 5 times; but for test conditions that can be quickly judged to be obviously unsuitable, it is not necessary to wait until 5 times.

[0043] Preferably, in step S1, the detected indicators include one or a combination of large piece rate DP, medium piece rate ZP, large and medium piece rate DZP, small piece rate XP, fragment rate SP, crushed piece rate SM, and leaf stem rate YG.

[0044] Preferably, in step S1, the large piece rate DP refers to the proportion of tobacco leaves with a specification larger than 25.4mm×25.4mm in the sample; the large and medium piece rate DZP refers to the proportion of tobacco leaves with a specification larger than 12.7mm×12.7mm in the sample, that is, the sum of the large piece rate and the medium piece rate; the small piece rate XP refers to the proportion of tobacco leaves with a specification between 6.35mm×6.35mm-12.7mm×12.7mm in the sample; the fragment rate SP refers to the proportion of tobacco leaves with a specification between 2.36mm×2.36mm-6.35mm×6.35mm in the sample; the crushed piece rate SM refers to the proportion of tobacco leaves with a specification less than 2.36mm×2.36mm in the sample; the stem content in leaves YG refers to the percentage of the weight of tobacco stems with a diameter greater than or equal to 1.5mm in the total weight of the tobacco leaves sample taken.

[0045] Preferably, in step S1, the detection method is carried out according to GB / T21137 "Determination of tobacco leaf size" and GB / T21136 "Determination of stem content in threshed tobacco leaves", or is carried out by the method described in "Blade structure detection method, system, medium and equipment based on machine vision" (CN201811346013.9) and "A non-destructive detection method and device for stem content in tobacco leaves" (CN201510006960.3).

[0046] Preferably, in step S2, the processing quality requirements include the quality indicators in YC / T146 "Technical Specifications for Threshing and Re-drying of Tobacco Leaves" and YC / T147 "Quality Inspection of Threshed Tobacco Leaves", as well as a custom quality indicator threshold range; the custom quality indicators are due to the differences in the specific qualified thresholds of the assessment indicators, and judgment requirements that conform to the actual situation are proposed based on the origin and tobacco characteristics.

[0047] Preferably, in step S2, the quality indicators include one or a combination of large piece rate DP, medium piece rate ZP, large and medium piece rate DZP, small piece rate XP, fragment rate SP, crushed piece rate SM, and leaf stem rate YG.

[0048] Preferably, in step S2, the sample that does not meet the processing quality requirements is a sample whose any quality index does not meet the processing quality requirements.

[0049] Preferably, in step S2, the qualified samples refer to samples whose test results of all quality indicators meet the processing quality requirements.

[0050] Preferably, in step S3, the detection index includes one or a combination of large piece rate DP, medium piece rate ZP, small piece rate XP, fragment rate SP, crushed piece rate SM, and leaf stem rate YG.

[0051] Preferably, in step S3, if there is no qualified sample, the processing method is rejected, the step is terminated, or the processing method is adjusted and re-sampled to perform steps S1-S3; if there is no qualified sample, it means that one or more processing parameters in the beating roller rotation speed, wind frequency, and tobacco flow rate in the beating process are not suitable, or the shape and specification of the frame in the beating machine are not suitable, or the front end leaf moistening pretreatment is not sufficient; the processing method is adjusted according to the index detection results and the relationship between the index and the processing parameters;

[0052] Preferably, in step S4, the tobacco leaf threshing characteristic evaluation auxiliary index E is used to indicate the level of stem content in the obtained tobacco leaves under the same threshing degree, or the tobacco leaf anti-breaking index when the same stem content level is achieved;

[0053] There are multiple evaluation indicators for leaf threshing, and there are certain correlations. For example, the large piece rate DP is positively correlated with the leaf stem rate YG, and negatively correlated with the fragmentation rate SP and the crushing rate SM. E is a simple indicator that can reflect the comprehensive quality of leaf threshing. First, the YG stem rate is weakly correlated with the fragmentation rate SP and the crushing rate SM, but the three are strongly correlated with other quality indicators, and the combination of the three can cover other indicator information. Second, this is based on the fundamental function of leaf threshing, that is, to separate the leaves from the stems, but to maintain the leaf shape without excessive crushing.

[0054] Preferably, in step S4, the tobacco leaf threshing characteristic evaluation auxiliary index E is used to represent a common performance index of tobacco leaf processing resistance and processing intensity; the smaller the E value is, the worse the tobacco leaf threshing resistance is, or the greater the processing intensity is.

[0055] Preferably, in step S5, Q A-m Used to indicate the processing resistance of the mth type of tobacco leaves under their most suitable processing conditions.

[0056] Preferably, in step S5, the processing resistance Q of different tobacco leaves is A , Q A The larger the value, the more resistant the leaf threshing characteristics are to processing.

[0057] Preferably, in step S5, for the mth tobacco leaf, the auxiliary evaluation index E m The smaller the value, the stronger the leaf threshing intensity; on the contrary, m The larger the value, the weaker the leaf threshing intensity.

[0058] Preferably, in step S5, Q B-mIt is used to indicate the degree of change of the threshing characteristics of the mth type of tobacco leaves under different processing conditions, that is, its adaptability to the threshing intensity.

[0059] Preferably, in step S5, the threshing resistance Q of different tobacco leaves is B , Q B The smaller the value, the stronger the adaptability of tobacco leaves to threshing processing.

[0060] Applying the above-mentioned tobacco leaf threshing characteristic determination method, the present application further provides a tobacco leaf shape characteristic determination method, step S6, calculating the tobacco leaf shape suitability P according to the mean value of the detection index;

[0061] The tobacco leaf type suitability P is calculated according to formula (5):

[0062] The formula (5) is:

[0063] Where P i represents the suitability of tobacco leaf type under the i-th test condition; DP i represents the mean rate of large pieces of tobacco leaves under the ith test condition; ZP i represents the mean percentage of tobacco leaves under the ith test condition; SP i represents the mean value of tobacco leaf fragmentation rate under the ith experimental condition; SM i It represents the mean tobacco leaf crushing rate under the i-th experimental condition.

[0064] Preferably, the tobacco leaf shape suitability P is used to indicate the leaf shape suitability, that is, the index for achieving "reducing bulk, increasing intermediate control of breakage" after processing. The larger the P value, the better the leaf shape suitability.

[0065] Applying the above-mentioned tobacco leaf shape characteristic determination method, the present application also provides a tobacco leaf shape control process determination method,

[0066] Step S7, calculating the practicality F of the sheet shape control process according to the tobacco sheet shape suitability P and the proportion w of qualified samples;

[0067] The practicality F of the sheet shape control process technology is calculated according to formula (6);

[0068] Formula (6) is: i =P i × i ,

[0069] In the formula, F i represents the practicality of the sheet shape control process under the i-th test condition; P i represents the suitability of tobacco leaf shape under the i-th test condition; w i It represents the proportion of qualified tobacco leaf samples under the i-th test condition.

[0070] Preferably, in step S7, the sheet shape control process refers to the optimization and adjustment of the pre-threshing pretreatment and threshing process technology of the same tobacco leaf in order to improve the suitability of the tobacco leaf shape.

[0071] Preferably, the practicality F of the sheet shape control process represents the comprehensive realization level of a certain sheet shape control process technology in terms of improving sheet shape suitability and ensuring basic quality indicators; the larger the F value, the higher the level of simultaneous achievement of multiple indicator targets, and the stronger the practicality of the technology.

[0072] The present invention provides a tobacco leaf threshing and sheet shape characteristic determination method and a sheet shape control process determination method, which have the following beneficial effects:

[0073] 1. The present invention provides a method for determining tobacco leaf threshing characteristics. Based on the conventional index detection data of tobacco leaf threshing process, an evaluation function model for tobacco leaf threshing processing resistance and processing adaptability is established to achieve a comprehensive and objective evaluation of the actual threshing characteristics of tobacco leaves, which can be used as a reference for setting and adjusting tobacco leaf processing parameters.

[0074] 2. A tobacco leaf shape characteristic determination method provided by the present invention establishes a tobacco leaf shape structure suitability evaluation function model based on conventional index detection data of tobacco leaf threshing process, thereby realizing evaluation of tobacco leaf shape suitability;

[0075] 3. The tobacco leaf shape control process determination method provided by the present invention can be expanded to evaluate the comprehensive practicality of different process technologies, thereby serving as a reference for tobacco leaf shape control process technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 Shown is an evaluation diagram of tobacco leaf shape suitability P and technical practicality F under different test conditions in Example 1 of the present invention;

[0077] Figure 2 It shows the tobacco leaf shape suitability evaluation diagram under different leaf beating parameter test conditions in Example 3 of the present invention. DETAILED DESCRIPTION

[0078] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0079] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0080] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0082] Example 1

[0083] Execute step S1, sampling and testing;

[0084] In a redrying plant, the leaf threshing test conditions were set for the C2F grade tobacco processing process in eight provinces including Fujian, Jiangxi, Hunan, Sichuan, Henan, Shandong, Liaoning and Jilin as shown in Table 1;

[0085] According to the requirements of YC / T146 "Technical Specifications for Tobacco Leaf Threshing and Redrying", samples are taken every hour and the number of samples N under each test condition is recorded. i ; The leaf structure and stem content of the sample were tested by referring to the standard methods of GB / T21137 "Determination of tobacco leaf size" and GB / T21136 "Determination of stem content in threshed tobacco leaves";

[0086] Table 1 Test condition settings and sampling quantity

[0087]

[0088] Note: Tobacco leaves will be sorted before processing, and the number of categories after sorting will be determined according to the strictness of the control requirements. For example, if a C2F grade tobacco leaf is purchased and the overall quality is good during the warehouse acceptance, and the characteristics of unqualified tobacco leaves are consistent, it will be divided into two categories: "qualified" and "unqualified", which is two points; if the uniformity is not good during the warehouse acceptance, and there are many adulterations, it will be divided into five categories: "good", "qualified", "bad", "upper mixed" and "lower mixed", which is five points. There are also three or four points between the two. Different companies have different standards; because the reciprocating turning and handling during the selection process will cause the tobacco leaves to break, affecting the results of the leaf threshing, so it is listed as a test condition.

[0089] S2, remove outliers and calculate the qualified ratio;

[0090] According to the processing quality requirements shown in Table 2, any sample that does not meet the requirements for large and medium pieces rate (i.e., the sum of large piece rate and medium piece rate), crushed powder rate, and stem content rate in leaves is classified as unqualified. The remaining qualified samples are counted as n. i ; Calculate the proportion of qualified samples under each test condition w according to formula (1) i ;

[0091] Formula (1) is:

[0092] In the formula, w i Indicates the proportion of qualified samples under the i-th test condition; N i Indicates the total number of samples collected under the i-th test condition; n i It represents the number of qualified samples remaining after removing unqualified samples under the i-th test condition;

[0093] Table 2 Quality requirements and qualified ratios for each test condition

[0094]

[0095] S3, calculating the mean value of each detection index;

[0096] Using the test data of qualified samples, calculate the mean value of each test index data under each test condition, including the large piece rate DP i , Medium film rate ZP i , Small film rate XP i , fragmentation rate SP i , crushing rate SM i , leaf stem content rate YG i .

[0097] S4, calculating the auxiliary index E for evaluating tobacco leaf threshing characteristics; according to the mean values ​​of the detection indicators obtained in Table 3, the auxiliary index E for evaluating tobacco leaf threshing characteristics is calculated according to formula (2); formula (2) is:

[0098] In the formula, E i YG represents the auxiliary index for evaluating tobacco leaf threshing characteristics under the i-th test condition; i represents the mean stem content of tobacco leaves under the ith test condition; SP i represents the mean value of the fragmentation rate of cigarettes under the i-th test condition; SM i represents the mean value of the cigarette fragmentation rate under the i-th test condition;

[0099] The calculated auxiliary index E for evaluating tobacco leaf threshing characteristics is the joint result of tobacco leaf processing resistance and processing strength. The smaller the E value, the worse the tobacco leaf threshing resistance or the greater the processing strength.

[0100] From the perspective of tobacco leaf selection before processing, the tobacco leaves from Sichuan and Henan involved the five-point method and the two-point method. The tobacco leaves from both producing areas showed that the E value of the five-point method was smaller, that is, the leaf threshing performance of the tobacco leaves obtained by the five-point method was not as good as that of the two-point method. This is because the five-point process caused more serious damage to the tobacco leaves than the two-point process, resulting in more obvious breakage during the processing;

[0101] Table 3 Mean values ​​of test indicators under various test conditions

[0102]

[0103] From the perspective of the use of frames for threshing, the tobacco leaves from Fujian, Jiangxi, Hunan, Sichuan and Liaoning involved a comparison between diamond frames and diamond-hexagonal combination frames. Among them, the tobacco leaves from Fujian, Jiangxi, Hunan and Liaoning all showed that the E value under the combination frame was smaller, that is, the leaf threshing strength of the combination frame was greater than that of the diamond frame. This is because the opening size of the hexagonal frame used in the combination frame is smaller than that of the diamond frame, making the leaf threshing process more fragmented; but for Sichuan tobacco, the E value under the diamond frame is smaller, which may be because it was selected by the five-point method at the same time, and the selection effect was greater than the frame effect, that is, the influence of the tobacco leaves' own processing resistance on the leaf threshing results exceeded the process adjustment;

[0104] S5, calculating tobacco leaf threshing characteristics Q;

[0105] According to the evaluation auxiliary index E data obtained in S4, calculate the tobacco leaf processing resistance Q A And processing adaptability Q B .in:

[0106] Tobacco leaf threshing resistance Q A According to formula (3),

[0107] Formula (3) is: Q A-m =max(E m1 ,E m2 ,…,E mn ),

[0108] In the formula, QA-m E represents the threshing resistance of the mth type of tobacco leaves; m1 ,E m2 ,…,E mn It indicates the evaluation auxiliary index results of the mth tobacco leaf under the first, second, ... nth process test conditions; max indicates the maximum value;

[0109] Tobacco leaf threshing process adaptability Q B According to formula (4),

[0110] Formula (4) is: Q B-m =range(E m1 ,E m2 ,…,E mn ),

[0111] In the formula, Q B-m E represents the adaptability of threshing processing of the mth type of tobacco leaves; m1 ,E m2 ,…,E mn It represents the evaluation auxiliary index results of the mth type of tobacco under the 1st, 2nd, ... nth process test conditions respectively; range represents the extreme value, that is, the difference between the maximum value and the minimum value.

[0112] When comparing different tobacco leaves, the threshing resistance Q A The larger the value, the stronger the tobacco leaf threshing resistance; B The smaller the value, the stronger the adaptability of tobacco leaf threshing processing, and theoretically the better the stability of threshing quality;

[0113] Table 4 Evaluation results of tobacco leaf threshing characteristics

[0114]

[0115] Regarding the processing resistance of tobacco leaves, Q A The values ​​are as follows: Jilin, Fujian, Jiangxi>Liaoning, Sichuan, Hunan>Shandong, Henan. That is, the tobacco leaves from Jilin, Jiangxi, and Fujian have stronger processing resistance, while the tobacco leaves from Shandong and Henan have poorer processing resistance.

[0116] Regarding the adaptability of tobacco leaves to threshing, tobacco leaves from Fujian, Jiangxi, Hunan, and Liaoning only involved comparative tests on the fences. B The values ​​are Fujian>Jiangxi>Hunan>>Liaoning, which means that the threshing results of tobacco leaves in Fujian are easily affected by changes in processing conditions, while tobacco leaves in Liaoning are more adaptable to processing conditions.

[0117] Overall, the production range is Q A The overall difference in values ​​is greater than the Q BThe value indicates that under normal processing conditions, the quality of tobacco leaf threshing is mainly determined by its processing resistance, and the processing adaptability has a relatively small impact;

[0118] S6, calculating the leaf shape suitability P of the tobacco leaves after threshing;

[0119] According to the mean values ​​of the detection indicators obtained in Table 3, the leaf shape suitability P of the threshed tobacco leaves was calculated according to formula (5).

[0120] Formula (5) is:

[0121] Where P i represents the suitability of tobacco leaf type under the i-th test condition; DP i represents the mean rate of large pieces of tobacco leaves under the ith test condition; ZP i represents the mean percentage of tobacco leaves under the ith test condition; SP i represents the mean value of tobacco leaf fragmentation rate under the ith experimental condition; SM i represents the mean value of tobacco leaf crushing rate under the ith test condition;

[0122] When comparing the tobacco leaf structures obtained by different pretreatment or threshing techniques for the same tobacco leaf, the larger the P value, the higher the level of "reducing bulk, increasing medium and controlling breakage" and the better the leaf shape suitability;

[0123] The specific calculation results are as follows Figure 1 shown.

[0124] From the perspective of using frames for leaf threshing, the comparison of diamond frames and diamond-hexagonal combination frames in tobacco leaves from Fujian, Jiangxi, Hunan, Sichuan, and Liaoning shows that the P value of each tobacco leaf under the combination frame is larger, that is, the tobacco leaf shape structure is more suitable under the combination frame; further, the P value of Hunan tobacco leaves under the full hexagonal frame is higher than that under the combination frame. This is because the opening of the hexagonal frame is more regular and the size is smaller than that of the diamond frame, which better achieves the effect of "reducing the large and increasing the medium", as shown in Table 3.

[0125] Under the same diamond frame, the leaf shape suitability P values ​​in Fujian, Jiangxi, Hunan, and Sichuan are close and relatively low, followed by Liaoning, Jilin, Henan, and Shandong. A The values ​​are approximately negatively correlated.

[0126] From the perspective of the selection method of tobacco leaves before processing, the comparison between the five-point method and the two-point method in Sichuan and Henan shows that the P value of Sichuan tobacco leaves as "Sichuan-five-point-diamond" is lower than that of "Sichuan-two-point-combination", and the P value of Henan tobacco leaves as "Henan-five-point-diamond" is approximately equal to that of "Henan-two-point-diamond". That is, the selection method has no obvious effect on the suitability of the leaf shape or at least does not exceed the influence of process adjustments such as the frame.

[0127] On the whole, the P value of tobacco leaf shape suitability after threshing is mainly affected by the threshing characteristics of the raw materials themselves and the parameters of the threshing equipment, but has little correlation with the structural state of the incoming tobacco leaves.

[0128] S7, calculate the practicality of the film shape control process technology F;

[0129] According to the tobacco leaf shape suitability P and the proportion of qualified samples w recorded in Table 2, the practicality F of the leaf shape control process technology is calculated according to formula (6).

[0130] Formula (6) is: i =P i × i

[0131] In the formula, F i represents the practicality of the film shape control technology under the i-th test condition; P i represents the suitability of tobacco leaf shape under the i-th test condition; w i It represents the proportion of qualified tobacco leaf samples under the i-th test condition.

[0132] When optimizing and adjusting the pre-threating and threshing techniques of the same tobacco leaves with the goal of improving the leaf shape suitability, the larger the F value, the higher the comprehensive level of achievement in improving the leaf shape suitability and ensuring basic quality indicators, and the stronger the practicality of the technology.

[0133] The specific calculation results are as follows Figure 1 shown.

[0134] From the perspective of the use of frames for threshing, when comparing the diamond frames and diamond-hexagonal combination frames for tobacco leaves from Fujian, Jiangxi, Hunan, Sichuan, and Liaoning, the F value of each tobacco leaf under the combination frames is relatively large, that is, the combination frame technology is more practical for obtaining tobacco leaves with suitable sheet shapes and basic quality that meet the standards; while Hunan tobacco leaves have the highest P value under the full hexagonal frames, but the F value is lower than that under the combination frames. This is because the leaf threshing under the hexagonal frames is more severely broken, so that the proportion w that meets the quality requirements is relatively low, as shown in Tables 2 and 3. Therefore, the full hexagonal frames are not practical.

[0135] From the perspective of tobacco leaf selection before processing, the comparison between the five-point method and the two-point method for tobacco leaves from Sichuan and Henan shows that the F value of the five-point method is lower than that of the two-point method. This is because the five-point method does not improve the P value of leaf suitability. On the contrary, the selection process causes a large degree of damage to the tobacco leaves, resulting in a low proportion w that meets quality requirements, as shown in Tables 2 and 3. Therefore, from the perspective of leaf threshing alone, the five-point method is not as practical as the two-point method.

[0136] Example 2

[0137] The data from the literature "The influence of cutting processing methods on the quality of threshing and re-curing tobacco leaves" (Yang Yang, Yang Yubo, Ou Mingyi, et al. Guizhou Agricultural Sciences, 2019, 47(03): 147-150) was used as an example for verification.

[0138] S1, sampling and testing;

[0139] In a redrying plant, a cutting experiment was set up for the processing of three grades of Cui Bi No. 1 tobacco varieties, X2F, C3F, and B2F, in Sanming, Fujian in 2017: T1, "two-stage" processing of removing the leaf base, using a cutter to cut 18-20 cm away from the leaf base, and processing the leaf body; T2, "two-stage" whole leaf processing, using a cutter to cut in the middle of the leaf, and two sections of tobacco leaves are processed at the same time; T3, "three-stage" whole leaf processing, using a cutter to divide the tobacco leaves into three sections in proportion, and the three sections of tobacco leaves are processed at the same time.

[0140] The conventional process parameters were used for processing. After redrying, samples were taken every 60 minutes at the boxing site. Each sample was 5 kg, and a total of 6 samples were taken. The leaf structure and stem content in the leaves were determined according to GB / T21137 and GB / T21136.

[0141] S2, remove outliers and calculate the qualified ratio;

[0142] Since it is impossible to check, it is unanimously believed that all samples meet the quality requirements, that is, the qualified rate is 100%;

[0143] S3, calculating the mean value of each detection index;

[0144] Refer to Table 3 of the original text, only the mean data are quoted.

[0145] S4, calculating the auxiliary index E for evaluating tobacco leaf threshing characteristics;

[0146] According to the mean values ​​of the detection indicators obtained in Table 5, the auxiliary indicator E for evaluating the tobacco leaf threshing characteristics is calculated according to formula (2).

[0147] Formula (2) is:

[0148] In the formula, E i YG represents the auxiliary index for evaluating tobacco leaf threshing characteristics under the i-th test condition; i represents the mean stem content of tobacco leaves under the ith test condition; SP i represents the mean value of the fragmentation rate of cigarettes under the i-th test condition; SM i It represents the mean value of the cigarette breakage rate under the i-th test condition.

[0149] S5, calculating tobacco leaf threshing characteristics Q;

[0150] According to the evaluation auxiliary index E data obtained in S4, calculate the tobacco leaf processing resistance QA And processing adaptability Q B .

[0151] Table 5 Mean leaf structure indexes of tobacco leaves after processing at different grades of cutting test

[0152]

[0153] Table 6 Evaluation of leaf threshing characteristics and leaf shape suitability of tobacco leaves in different grade cutting tests

[0154]

[0155] Among them: Tobacco leaf threshing resistance Q A According to formula (3),

[0156] Formula (3) is: Q A-m =max(E m1 ,E m2 ,…,E mn );

[0157] In the formula, Q A-m E represents the threshing resistance of the mth type of tobacco leaves; m1 ,E m2 ,…,E mn It represents the evaluation auxiliary index results of the mth tobacco leaf under the 1st, 2nd ... nth process test conditions respectively; max means to obtain the maximum value.

[0158] Tobacco leaf threshing process adaptability Q B According to formula (4),

[0159] Formula (4) is: Q B-m =range(E m1 ,E m2 ,…,E mn );

[0160] In the formula, Q B-m E represents the adaptability of threshing processing of the mth type of tobacco leaves; m1 ,E m2 ,…,E mn It represents the evaluation auxiliary index results of the mth type of tobacco under the 1st, 2nd, ... nth process test conditions respectively; range represents the extreme value, that is, the difference between the maximum value and the minimum value.

[0161] When comparing different tobacco leaves, the threshing resistance Q A The larger the value, the stronger the tobacco leaf threshing resistance; B The smaller the value, the stronger the adaptability of tobacco leaves to threshing processing, and theoretically the better the stability of threshing quality.

[0162] Regarding tobacco leaf threshing resistance, there are three levels of Q A The values ​​are from large to small: B2F≥C3F>>X2F, that is, the processing resistance becomes worse. This is consistent with the conclusion of the article that "the lower leaves should be processed in a flexible way because their physical indicators (tensile strength, elongation at break, leaf weight, etc.) are lower than those of the middle and upper leaves" and "the upper leaves have stronger processing resistance".

[0163] Regarding the adaptability of tobacco leaf threshing processing, there are three levels of Q B The values ​​are C3F>B2F>>X2F, which means that the threshing results of C3F tobacco leaves are most susceptible to changes in the cutting method, while X2F tobacco leaves are more adaptable to the cutting method. On the other hand, both C3F and B2F showed the smallest E value in the T3 test group, which means the processing intensity is the highest, which is consistent with the intuitive feeling that the actual "three-stage" cutting is stronger than the "two-stage" cutting.

[0164] S6, calculating the leaf shape suitability P of the tobacco leaves after threshing;

[0165] According to the mean values ​​of the test indicators obtained in Table 5, the leaf shape suitability P of the threshed tobacco leaves was calculated according to formula (5).

[0166] Formula (5) is:

[0167] Where P I represents the suitability of tobacco leaf type under the i-th test condition; DP i represents the mean rate of large pieces of tobacco leaves under the ith test condition; ZP i represents the mean percentage of tobacco leaves under the ith test condition; SP i represents the mean value of tobacco leaf fragmentation rate under the ith experimental condition; SM i It represents the tobacco leaf crushing rate under the i-th experimental condition.

[0168] In terms of leaf shape suitability, the maximum P value points of X2F, C3F, and B2F tobacco leaves appear at T2, T1, and T3, respectively. This is consistent with the conclusion of the article that "the leaf structure of flue-cured tobacco leaves of X2F grade at T2 is optimal, the leaf structure of flue-cured tobacco leaves of C3F grade at T1 is optimal, and the leaf structure of flue-cured tobacco leaves of B2F grade at T3 is optimal", but the article does not provide the basis for this conclusion, and the present invention can be used to support it better.

[0169] Example 3

[0170] The data from the literature "Research on optimization of leaf-threshing parameters to improve the applicability of leaf structure" (Ji Rongzhan, Xu Qiang, Xu Shaohuai, et al. Anhui Agricultural Sciences, 2020, 48(09): 193-196) was used as an example for verification.

[0171] S1, sampling and testing

[0172] In a redrying plant, an orthogonal experiment was set up for three threshing parameters: material flow rate, frame opening shape and size, and threshing roller speed, during the processing of C3F grade tobacco leaves of Yunyan 87 variety from Sanmenxia, ​​Henan in 2016.

[0173] The sampling and testing of process quality are carried out in accordance with the industry standard method YC / T 146 "Technical Specifications for Tobacco Leaf Threshing and Redrying".

[0174] Table 7 Experimental conditions for different leaf-threshing parameters

[0175]

[0176] S2, remove outliers and calculate the qualified ratio

[0177] Since it is impossible to check, it is unanimously believed that all samples meet the quality requirements, that is, the pass rate is 100%.

[0178] S3, calculate the mean results of each detection index

[0179] Referring to Table 2 in the original text, the column “Rate of large and medium-sized films” is not cited.

[0180] This embodiment does not focus on leaf threshing characteristics, and skips S4 and S5.

[0181] S6, calculate the leaf shape suitability P of the tobacco leaves after threshing

[0182] According to the mean values ​​of the test indicators obtained in Table 8, the leaf shape suitability P of the threshed tobacco leaves was calculated according to formula (5).

[0183] Formula (5) is:

[0184] Where P i represents the suitability of tobacco leaf type under the i-th test condition; DP i represents the mean rate of large pieces of tobacco leaves under the ith test condition; ZP i represents the mean percentage of tobacco leaves under the ith test condition; SP i represents the mean value of tobacco leaf fragmentation rate under the ith experimental condition; SM i It represents the mean tobacco leaf crushing rate under the i-th experimental condition.

[0185] The specific calculation results are as follows Figure 2 shown.

[0186] To determine the optimal processing conditions, the original article first standardized the data for benefit-type indicators such as the medium-sized piece rate and the large-medium-sized piece rate, and cost-type indicators such as the large piece rate, fragmentation rate, and leaf stem content; then weighted each indicator based on experience; and finally calculated the comprehensive score through the weighted method.

[0187] Comparing the film type suitability score calculated by the method of the present invention with the comprehensive score of the article, it can be seen that although the orders of magnitude are different, except for T1 and T9, which are interchanged, the other seven indicators are ranked consistently.

[0188] Table 8 Mean leaf structure indexes of tobacco leaves after processing under different leaf threshing parameters

[0189]

[0190] In summary, the present invention provides an evaluation method for tobacco leaf threshing characteristics and sheet shape control process effects, based on conventional index detection data of tobacco leaf threshing process, starting from the essence of threshing process and index correlation, to achieve objective, simple and accurate evaluation of actual tobacco leaf threshing characteristics and sheet shape structure suitability, and can guide tobacco leaf processing parameter setting adjustment and sheet shape control process technology optimization. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high practical application value.

[0191] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A method for measuring tobacco leaf threshing characteristics, characterized in that: The following steps are involved: Step S1, sampling and testing the tobacco leaves after threshing and de-stemming under each test condition; The types of experimental conditions include: comparison of different tobacco leaf types, comparison of different pretreatment types, and comparison of different threshing process types; Sampling shall be carried out in accordance with one or a combination of YC / T146 "Technical Specifications for Threshing and Redrying of Tobacco Leaves" and YC / T147 "Quality Inspection of Threshed Tobacco Leaves"; The testing method shall be carried out in accordance with one or a combination of GB / T21137 "Determination of tobacco leaf size" and GB / T21136 "Determination of stem content in threshed tobacco leaves"; The detection indexes include one or a combination of large piece rate DP, medium piece rate ZP, large and medium piece rate DZP, small piece rate XP, fragment rate SP, broken powder rate SM, and leaf stem rate YG; The large piece rate DP refers to the proportion of tobacco leaves with a size larger than 25.4mm×25.4mm in the sample; the large and medium piece rate DZP refers to the proportion of tobacco leaves with a size larger than 12.7mm×12.7mm in the sample, that is, the sum of the large piece rate and the medium piece rate; the small piece rate XP refers to the proportion of tobacco leaves with a size between 6.35mm×6.35mm-12.7mm×12.7mm in the sample; the fragment rate SP refers to the proportion of tobacco leaves with a size between 2.36mm×2.36mm-6.35mm×6.35mm in the sample; the broken pieces rate SM refers to the proportion of tobacco leaves with a size smaller than 2.36mm×2.36mm in the sample; the stem content rate YG refers to the percentage of the weight of tobacco stems with a diameter greater than or equal to 1.5mm in the total weight of the tobacco leaves sample; Step S2, eliminating sample data that do not meet the processing quality requirements, and calculating the proportion w of qualified samples under each test condition; Processing quality requirements include one or a combination of the quality indicators in YC / T146 "Technical Specifications for Threshing and Redrying of Tobacco Leaves" and YC / T147 "Quality Inspection of Threshed Tobacco Leaves"; The quality indexes include one or a combination of large piece rate DP, medium piece rate ZP, large and medium piece rate DZP, small piece rate XP, fragment rate SP, crushed powder rate SM, and stem content rate YG in leaves; Samples that do not meet the processing quality requirements are samples whose quality indicators do not meet the processing quality requirements; qualified samples refer to samples whose test results of all quality indicators meet the processing quality requirements; The qualified sample ratio w is calculated according to formula (1): The formula (1) is: In the formula, w i Indicates the proportion of qualified samples under the i-th test condition, N i represents the total number of samples collected under the i-th test condition, n i It represents the number of qualified samples remaining after removing unqualified samples under the i-th test condition; Step S3, calculating the mean value of the detection index under each test condition for the qualified sample detection data obtained after S1 detection and S2 screening; The detection index is one or a combination of large piece rate DP, medium piece rate ZP, small piece rate XP, fragment rate SP, broken powder rate SM, and stem content rate YG in leaves; Step S4, calculating the tobacco threshing characteristic evaluation auxiliary index E according to the mean value of the detection index, The auxiliary index E for evaluating tobacco leaf threshing characteristics is calculated according to formula (2): The formula (2) is: In the formula, E i YG represents the auxiliary index for evaluating tobacco leaf threshing characteristics under the i-th test condition; i represents the mean stem content of tobacco leaves under the ith test condition; SP i represents the mean value of the fragmentation rate of cigarettes under the i-th test condition; SM i represents the mean value of the cigarette fragmentation rate under the i-th test condition; Step S5, calculating the tobacco leaf threshing characteristics Q according to the auxiliary index E; the tobacco leaf threshing characteristics Q include the processing resistance Q A And processing adaptability Q B ; The processing resistance Q of the tobacco leaf threshing characteristics A According to formula (3), The formula (3) is: Q A-m =max(E m1 ,E m2 ,…,E mn ), In the formula, Q A-m Indicates the processing resistance of the leaf threshing characteristics of the mth type of tobacco leaves; E m1 ,E m2 ,…,E mn It indicates the evaluation auxiliary index of the mth tobacco leaf under the first, second, ... nth process test conditions; max indicates the maximum value; Processing adaptability of tobacco leaf threshing characteristics B Calculate according to formula (4); Formula (4) is: Q B-m =range(E m1 ,E m2 ,…,E mn ), In the formula, Q B-m represents the processing adaptability of the tobacco threshing characteristics of the mth tobacco leaf; E m1 ,E m2 ,…,E mn It represents the auxiliary evaluation index of the mth type of tobacco under the first, second, ... nth process test conditions respectively; range represents the extreme value, that is, the difference between the maximum value and the minimum value.

2. The method for measuring tobacco leaf threshing characteristics according to claim 1, characterized in that: In step S1, the tobacco leaf types include: different origins, grades, and composition ratios, or a combination of different types.

3. The method for measuring tobacco leaf threshing characteristics according to claim 1, characterized in that: In step S1, the pretreatment types include: one or a combination of the treatment methods of picking, feeding, cutting, moistening and moistening before leaf threshing, or one or a combination of the treatment intensities of picking, cutting, moistening and moistening before leaf threshing.

4. The method for measuring tobacco leaf threshing characteristics according to claim 1, characterized in that: In step S1, the threshing process type includes that one element or a combination of elements of the threshing process is different; The elements of the threshing process include: threshing process path, threshing equipment type and threshing equipment parameters; The threshing process path is used to separate the leaf stems or adjust the structure of the tobacco leaves; The threshing process includes: feeding threshing, screening and re-threshing after threshing, and screening and shearing after threshing; The types of leaf threshing equipment include: feeder, leaf threshing machine, air separator, belt conveyor, built-in frame, fixed knife, moving knife, rotor, throwing roller, vibrating screen; The parameters of leaf beating equipment include: the rotating speed of the beating rollers of different leaf beating units, the wind separation frequency of different wind separation units, and the tobacco leaf flow rate.

5. The method for measuring tobacco leaf threshing characteristics according to claim 1, characterized in that: In step S1, the tobacco leaves after threshing and de-stemming are tobacco leaves before re-roasting after threshing or tobacco leaves after re-roasting.

6. The method for measuring tobacco leaf threshing characteristics according to claim 1, characterized in that: In step S3, if there is no qualified sample, the processing method is rejected and the step is terminated, or the processing method is adjusted and re-sampled to execute steps S1-S3.

7. The method for measuring tobacco leaf threshing characteristics according to claim 1, characterized in that: In step S4, the tobacco leaf threshing characteristic evaluation auxiliary index E is used to indicate the stem content level in the obtained tobacco leaves under the same threshing degree, or the tobacco leaf anti-breaking index when the same stem content level is achieved.

8. The method for measuring tobacco leaf threshing characteristics according to claim 1, characterized in that: In step S4, the tobacco leaf threshing characteristic evaluation auxiliary index E is used to represent a common performance index of tobacco leaf processing resistance and processing strength.

9. The method for measuring tobacco leaf threshing characteristics according to claim 1, characterized in that: In step S5, Q A-m It is used to indicate the processing resistance of the leaf threshing characteristics of the mth tobacco leaf under its most suitable processing conditions; in step S5, the processing resistance Q of the leaf threshing characteristics of different tobacco leaves A , Q A The value is positively correlated with the processing resistance of leaf threshing characteristics; In step S5, for the mth tobacco leaf, the auxiliary index E is evaluated. m The value is negatively correlated with the intensity of leaf threshing; In step S5, Q B-m It is used to indicate the degree of change of the threshing characteristics of the mth tobacco leaf under different processing conditions, that is, the adaptability to the threshing intensity; In step S5, the threshing resistance Q of different tobacco leaves is B , Q B The value is negatively correlated with the adaptability of tobacco leaf threshing processing.

10. A method for determining tobacco leaf shape characteristics, using the method for determining tobacco leaf threshing characteristics according to any one of claims 1 to 9, characterized in that: Step S6, calculating the tobacco leaf shape suitability P according to the mean value of the detection index; The tobacco leaf type suitability P is calculated according to formula (5): The formula (5) is: Where P i represents the suitability of tobacco leaf type under the i-th test condition; DP i represents the mean rate of large pieces of tobacco leaves under the ith test condition; ZP i represents the mean percentage of tobacco leaves under the ith test condition; SP i represents the mean value of tobacco leaf fragmentation rate under the ith experimental condition; SM i represents the mean value of tobacco leaf crushing rate under the ith test condition; Tobacco leaf shape suitability P is used to indicate leaf shape suitability. The P value is positively correlated with the leaf shape suitability. The P value is positively correlated with the index of achieving "reducing size, increasing yield and controlling breakage" after processing.

11. A tobacco leaf shape control process determination method, using the tobacco leaf shape characteristic determination method as claimed in claim 10, characterized in that: Step S7, calculating the practicality F of the sheet shape control process according to the tobacco leaf shape suitability P and the proportion w of qualified samples; The practicality F of the sheet shape control process is calculated according to formula (6); Formula (6) is: i =P i × i , In the formula, F i represents the practicality of the sheet shape control process under the i-th test condition; P i represents the suitability of tobacco leaf shape under the i-th test condition; w i It represents the proportion of qualified tobacco samples under the i-th test condition; The practicality of the sheet shape control process F is used to indicate the comprehensive achievement index of a certain sheet shape control process in terms of improving sheet shape suitability and ensuring basic quality indicators; the F value is positively correlated with the practicality of the sheet shape control process.

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