CN115932185A

CN115932185A - Tobacco leaf threshing and sheet type characteristic measuring method and sheet type control process measuring method

Info

Publication number: CN115932185A
Application number: CN202310010134.0A
Authority: CN
Inventors: 张鑫; 杨凯; 徐玮杰; 王戈; 丁冉
Original assignee: Shanghai Tobacco Group Co Ltd
Current assignee: Shanghai Tobacco Group Co Ltd
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-04-07

Abstract

A tobacco leaf threshing and sheet type characteristic measuring method and a sheet type control process measuring method are disclosed, wherein the method comprises the following steps of S1-S7, through tests, sampling and detection, calculating qualified proportion under each test condition, detecting qualified samples and calculating proportion, establishing an auxiliary index E, constructing threshing characteristics Q, calculating tobacco leaf type fitness P, and calculating sheet type control process practicability F; based on the conventional index detection data of the tobacco leaf threshing process, an evaluation function model of the tobacco leaf threshing processing resistance and processing adaptability is established, comprehensive objective evaluation of the actual threshing characteristics of the tobacco leaves is realized, and the comprehensive objective evaluation is used as a reference basis for setting and adjusting tobacco leaf processing parameters; based on the conventional index detection data in the tobacco leaf threshing process, a tobacco leaf type structure suitability evaluation function model is established, and the evaluation on the tobacco leaf type suitability is realized; the tobacco leaf type control process measuring method can be used for evaluating the comprehensive practicability of different process technologies, and therefore can be used as a reference basis of the tobacco leaf type control process technology.

Description

Tobacco leaf threshing and sheet shape characteristic measuring method and sheet shape control process measuring method

Technical Field

The invention relates to the technical field of tobacco leaf threshing and redrying, in particular to a method for measuring threshing characteristics and sheet type characteristics of tobacco leaves, and also relates to an evaluation method of a sheet type control process after application.

Background

Threshing and redrying are the technological processes of linking tobacco planting and cigarette manufacturing, wherein threshing is to separate leaves from tobacco stems by utilizing mechanical means and wind force;

quality requirements and technical indexes for threshing procedures in tobacco industry standards YC/T146-2010 tobacco threshing and redrying process specifications and YC/T147-2010 threshing tobacco quality inspection mainly comprise leaf structures (including large leaf rate, large and medium leaf rate, broken powder rate and the like) and stem content in leaves and the like; with the development of medium and fine cigarette, the concept of the threshing process is gradually changed into 'reducing, improving, controlling, crushing and removing stalks', and the requirements are that: reducing the flake rate, improving the medium flake rate, controlling the proportion of the fragments and the powder, effectively removing the stems in the leaves, changing the control target of the tobacco flake structure, for example, YC/T146-2010 requires that the content of the first-class large-area rate (more than 25.4mm multiplied by 25.4 mm) of flue-cured tobacco is more than or equal to 47 percent, while the content of the first-class large-area rate (more than 25.4mm multiplied by 25.4 mm) of flue-cured tobacco is required to be less than 45 percent in the cigarette process specification in 2016 year; the reason is that the processing yield needs to be ensured, and the large sheet rate is required to be high, namely, the tobacco leaves are not broken; the large slice rate is high, the cut tobacco shreds are long, but the quality control of newly developed medium and fine cigarette products is not facilitated, such as uneven blending, generation of empty ends and the like;

the key to achieve the combination of product yield and quality in the threshing process is to find out threshing processes, equipment, parameters and the like matched with the threshing characteristics of tobacco leaves; the threshing characteristic of the tobacco leaves comprises two aspects, namely, the quality of the threshing product of the tobacco leaves under the optimal process technical parameters is the processing resistance determined by the quality characteristic of the tobacco leaves, and is similar to the processing resistance which is commonly known as 'processing resistance'; the second is the change condition of the quality of the threshing product of the tobacco under different process technical parameters, which is the processing adaptability of the tobacco to the change of external conditions. At present, most of researches on tobacco leaf threshing characteristics aim at 'processing resistance', for example, mechanical characteristic index data such as tensile force, penetrating force, shearing force, adhesion force and the like are used for carrying out simple qualitative evaluation on tobacco leaves, and the evaluation is used as a basis for process design and parameter setting (Chinese patent 201110362709.2, a threshing and redrying new process based on tobacco leaf mechanical characteristic difference, and Chinese patent 201810424735.5, a threshing and redrying tobacco leaf pretreatment process method based on tobacco leaf raw material characteristics), but the indexes are greatly influenced by the moisture content and the temperature of the tobacco leaves, and detection samples are only partial areas of the whole tobacco leaves, so that detection results cannot reflect the characteristics of an actual processing process; the processing adaptability is not much reported, for example, the optimization of the currently concerned leaf structure can be realized by various means such as adjusting the incoming material state and threshing parameters of tobacco leaves (a control method of a threshing redried strip tobacco structure in a Chinese patent 2018110890436), replacing the frame column specification (a quincunx threshing frame column in a Chinese patent 2021204529005), screening and reprocessing (a threshing redried processing method for simultaneously regulating and controlling the strip tobacco structure and the stem content in leaves in a Chinese patent 2017108172052) and the like;

at present, tobacco agricultural product processing is not guided by an accurate theory, and most of tobacco agricultural products still depend on artificial experience; dozens of direct factors influencing threshing processing are provided, the combination is various, and the result shows that the processing strength is different; the processing strength is high, the tobacco leaves are seriously crushed, and the large and medium fragment rate (lower control limit) and the fragment and powder rate (upper control limit) can not reach the standard; the processing strength is low, the tobacco leaves are not processed fully, and the large piece rate and the stem content (upper limit control) in the leaves can not reach the standard; however, each factor can generate bidirectional influence on the processing strength and has different influence degrees on different tobacco leaves, so that a measurable tobacco leaf processing resistance needs to be constructed;

however, the effect of each adjustment mode on the treatment of tobacco leaves with different processing resistances is rarely compared, and in addition, even if a single tobacco leaf is researched, the evaluation of the result is only to investigate whether the effect is more close to the target requirement, but a comprehensive evaluation method is lacked to compare the effects of different treatment means, so that the realization of the personalized processing of the tobacco leaves is limited.

Disclosure of Invention

In view of the above, the present invention provides a method for evaluating or determining tobacco leaf threshing characteristics and leaf-type control process effects, which constructs an evaluation function of tobacco leaf threshing characteristics and leaf-type control process effects based on data of leaf structure and stem content in leaves detected in a processing process, and implements determination of tobacco leaf processing characteristics and leaf structure optimization process effects under actual processing conditions, i.e., calculation of evaluation indexes.

The present application is directed to solving one of the problems in the background art.

The technical scheme adopted by the invention is as follows: in order to achieve the above objects and other related objects, the present invention provides a method for measuring threshing characteristics of tobacco leaves, comprising the steps of:

s1, sampling and detecting the tobacco flakes after threshing and removing stems under each test condition;

s2, eliminating sample data which do not meet the processing quality requirement, calculating the proportion w of qualified samples under each test condition,

the proportion w of the qualified sample is calculated according to the formula (1),

the formula (1) is:

in the formula, w _i Represents the ratio of acceptable samples under the i-th test condition, N _i Denotes the total number of samples collected under the i-th test condition, n _i The number of qualified samples left after unqualified samples are removed under the ith test condition is represented;

s3, calculating the mean value of the detection indexes under each test condition for the qualified sample detection data obtained after the S1 detection and the S2 screening;

s4, calculating an auxiliary index E for evaluating the threshing characteristics of the tobacco leaves according to the average value of the detection indexes,

the auxiliary index E for evaluating the threshing characteristics of the tobacco leaves is calculated according to the formula (2),

the formula (2) is:

in the formula, E _i The auxiliary index of tobacco leaf threshing characteristic evaluation under the ith test condition is represented; YG _i Representing the mean cut-stem content of the tobacco leaves under the ith test condition; SP _i The average value of the fragment rate of the tobacco flakes under the ith test condition is shown; SM _i The average value of the tobacco flake crumbling rate under the ith test condition is shown;

s5, calculating tobacco leaf threshing characteristics Q according to the auxiliary indexes E; the tobacco leaf threshing characteristic Q includes the processing resistance Q _A And processing suitability Q _B ；

The tobacco leaves have the threshing characteristic and the processing resistance Q _A The calculation is carried out according to the formula (3),

the formula (3) is: q _A-m ＝max(E _m1 ,E _m2 ,…,E _mn )，

In the formula, Q _A-m A processing resistance indicating threshing characteristics of the mth tobacco leaf; e _m1 ,E _m2 ,…,E _mn The evaluation auxiliary indexes of the mth tobacco under the 1 st and 2 nd process test conditions of the mth tobacco are shown; max represents the maximum value;

processing adaptability of tobacco leaf threshing characteristics Q _B Calculating according to a formula (4);

the formula (4) is: q _B-m ＝range(E _m1 ,E _m2 ,…,E _mn )，

In the formula, Q _B-m The processing adaptability of the threshing characteristics of the mth tobacco leaves is shown; e _m1 ,E _m2 ,…,E _mn The method comprises the steps of (1) representing the evaluation auxiliary indexes of the mth tobacco leaves under the 1 st and 2 nd process test conditions of 823030303030nTth tobacco leaves; range represents the difference between the maximum and minimum values.

The technical scheme provided by the application further comprises the following technical characteristics:

preferably, in step S1, the types of test conditions include, but are not limited to, comparison of different tobacco leaf types, comparison of different pretreatment types, and comparison of different threshing process types.

Preferably, in step S1, the tobacco leaf types include, but are not limited to, one or a combination of different producing areas, grades, and composition ratios.

Preferably, in step S1, the pretreatment types include, but are not limited to, different treatment methods such as picking, feeding, cutting, dampening and wetting before threshing, and different combinations thereof.

Preferably, in step S1, the pretreatment types include, but are not limited to, one or a combination of different treatment strengths of picking, feeding, slitting, dampening and moistening before threshing.

Preferably, in step S1, the threshing process type includes that one element or a combination element of the threshing process is different.

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

Preferably, in step S1, the threshing process path is used for realizing a processing process aiming at separating leaves and stems or adjusting the structure of the tobacco lamina.

Preferably, the threshing process path includes, but is not limited to, feeding threshing, post-threshing screen redraw, and post-threshing screen shear.

Preferably, in step S1, the threshing device is of a type including, but not limited to, a feeder, a threshing machine, a pneumatic separator, a belt conveyor, a built-in frame fence, a fixed knife, a movable knife, a rotor, a throwing roller, and a vibrating screen.

Preferably, in step S1, the threshing device parameters include, but are not limited to, the rotation speed of the threshing rollers of different threshing units, the air separation frequency of different air separation units, and the tobacco flow rate.

Preferably, in step S1, the threshed and stemmed tobacco flakes include tobacco flakes after threshing and before redrying and/or tobacco flakes after redrying.

Preferably, in step S1, the tobacco lamina after threshing and stem removing is the tobacco lamina before redrying after threshing.

Preferably, in step S1, sampling is performed according to one or a combination of YC/T146, tobacco threshing and redrying technical Specification and YC/T147, tobacco threshing and quality inspection.

Preferably, in step S1, the sampling frequency is executed according to the evaluation test requirement.

Preferably, in step S1, the number of sampling times is not less than 3 times per test condition; in general, 3 valid data results are reliable; because S2 needs to be subjected to qualification judgment, in order to avoid accidental unqualified samples in the test process, not less than 5 times is recommended; but it is not mandatory to wait as many as 5 times for test conditions that can quickly determine an obvious inapplicability.

Preferably, in step S1, the detected index includes one or a combination of the large slice rate DP, the medium slice rate ZP, the large and medium slice rate DZP, the small slice rate XP, the fragment rate SP, the powder rate SM, and the peduncle content YG in the leaves.

Preferably, in step S1, the large sheet fraction DP is a proportion of the sample occupied by the tobacco sheet with a specification of more than 25.4mm × 25.4 mm; the large and medium sheet rate DZP refers to the proportion of the sheet tobacco with the specification of more than 12.7mm multiplied by 12.7mm in the sample, namely the sum of the large sheet rate and the medium sheet rate; the small piece ratio XP refers to the proportion of the tobacco flakes in the sample with the specification of 6.35mm multiplied by 6.35mm-12.7mm multiplied by 12.7 mm; the fragment rate SP refers to the proportion of the tobacco flakes with the specification of 2.36mm multiplied by 2.36mm-6.35mm multiplied by 6.35mm in the sample; the scrap rate SM refers to the proportion of the tobacco flakes with the specification of less than 2.36mm multiplied by 2.36mm in the sample; the peduncle content YG in the leaf means the weight of the cabo with diameter larger than and equal to 1.5mm is the percentage of the total weight of the tobacco sample.

Preferably, in step S1, the detection mode is performed according to GB/T21137 "measurement of tobacco lamina size" and GB/T21136 "measurement of stem content in lamina of threshed tobacco", or is performed by a method described in "method, system, medium and apparatus for detecting leaf structure based on machine vision" (CN 201811346013.9) "and" method and apparatus for non-destructive detection of stem content in tobacco "(CN 201510006960.3).

Preferably, in the step S2, the processing quality requirements comprise quality indexes in YC/T146 tobacco threshing and redrying process specification and YC/T147 tobacco threshing and quality inspection, and a user-defined quality index threshold range; the user-defined quality index is that the specific qualified threshold values of the assessment indexes are different, and the determination requirement which meets the actual condition is provided according to the production place and the tobacco leaf characteristics.

Preferably, in step S2, the quality index includes one or a combination of a large slice rate DP, a medium slice rate ZP, a large and medium slice rate DZP, a small slice rate XP, a fragment rate SP, a powder rate SM, and a peduncle content YG in leaves.

Preferably, in step S2, the sample that does not meet the processing quality requirement is a sample that does not meet the processing quality requirement in any of the quality indexes.

Preferably, in step S2, the qualified sample refers to a sample whose quality index detection result meets the processing quality requirement.

Preferably, in step S3, the detection index includes one or a combination of the large slice rate DP, the medium slice rate ZP, the small slice rate XP, the fragment rate SP, the powder rate SM, and the peduncle content YG in the leaf.

Preferably, in step S3, if there is no qualified sample, the processing mode is rejected, the step is terminated, or the processing mode is adjusted and then re-sampling is performed to execute steps S1 to S3; if no qualified sample exists, one or more processing parameters in the threshing link, such as roller rotating speed, air separation frequency and tobacco flow are not suitable, or the shape and specification of a middle frame rail of a threshing machine are not suitable, or the front end moistening pretreatment is insufficient; adjusting the processing mode according to the index detection result and the relation between the index and the processing parameter;

preferably, in step S4, the auxiliary index E for evaluating the threshing characteristics of the tobacco leaves is used for indicating the level of the stem content in the tobacco leaves of the obtained tobacco lamina under the same degree of crushing, or the index of the resistance to crushing of the tobacco leaves when the level of the stem content in the same tobacco leaves is reached;

the evaluation indexes of threshing processing have a plurality of items, and certain correlation exists, such as positive correlation between the large slice rate DP and the stem content YG in the leaves, and negative correlation between the large slice rate DP and the stem content YG in the leaves; e is an index which is simple and convenient to construct and can reflect the comprehensive quality of threshing, firstly, the YG has weak correlation with the stem content, the fragment rate SP and the powder rate SM, but the correlation of the YG, the stem content, the fragment rate SP and the powder rate SM is strong with other quality indexes, and the combination of the YG, the fragment rate SP and the powder rate SM can cover other index information; secondly, the leaf stem is separated from the leaf blade from the basic function of threshing, but the shape of the leaf blade is maintained without excessive crushing.

Preferably, in the step S4, the auxiliary index E for evaluating the threshing characteristics of the tobacco leaves is used for representing a common performance index of the effects of the processing resistance and the processing strength of the tobacco leaves; a smaller E value indicates a poorer resistance to working for threshing tobacco leaves or a higher working strength.

Preferably, in step S5, Q _A-m Used to show the resistance to processing of the mth tobacco leaf to its threshing characteristics under the most suitable processing conditions.

Preferably, in step S5, the tobacco leaves have different threshing characteristics and processing resistance Q _A ，Q _A The larger the value, the stronger the resistance to processing of the threshing characteristics.

Preferably, in step S5, the auxiliary index E is evaluated for the mth tobacco leaf _m The smaller the value is, the stronger the threshing processing strength is; otherwise, E _m The larger the value, the weaker the threshing strength.

Preferably, in step S5, Q _B-m The expression is used for expressing the variation degree of the threshing characteristics of the mth tobacco leaves under different processing conditions, namely the adaptability to the threshing processing strength.

Preferably, in step S5, the threshing processability of different tobacco leaves Q _B ，Q _B The smaller the value, the stronger the adaptability of tobacco leaf threshing processing.

By applying the tobacco leaf threshing characteristic measuring method, the application also provides a tobacco leaf type characteristic measuring method, and the step S6 is to calculate the tobacco leaf type suitability P according to the detection index mean value;

the tobacco lamina type fitness P is calculated according to the formula (5),

the formula (5) is:

in the formula, P _i Indicating the suitability of the tobacco leaf type under the ith test condition; DP _i Representing the average value of the tobacco leaf large-piece rate under the ith test condition; ZP _i Representing the mean value of the tobacco leaf medium rate under the ith test condition; SP _i Representing the mean value of the tobacco fragment rate under the ith test condition; SM _i The average value of the tobacco shred fraction rate under the ith test condition is shown.

Preferably, the tobacco lamina suitability P is used to indicate the lamina suitability, i.e., an index for realizing "reducing, increasing, controlling and crushing" after processing, and the greater the value of P, the better the lamina suitability.

By applying the tobacco lamina type characteristic measuring method, the application also provides a tobacco lamina type control process measuring method,

s7, calculating the practicability F of the sheet type control process according to the tobacco leaf type suitability P and the qualified sample proportion w;

calculating the sheet type control process technology practicability F according to a formula (6);

equation (6) is: f _i ＝P _i ×w _i ，

In the formula, F _i The practicability of the sheet type control process under the ith test condition is shown; p is _i Indicating the suitability of the tobacco leaf type under the ith test condition; w is a _i The proportion of qualified tobacco samples under the ith test condition is shown.

Preferably, in step S7, the sheet type control process refers to optimization and adjustment of pretreatment before threshing, threshing process technology, and the like of the same tobacco leaves to improve the suitability of the tobacco leaf type.

Preferably, the practicability F of the sheet type control process represents the comprehensive realization level of a certain sheet type control process technology in the aspects of improving sheet type suitability and guaranteeing basic quality indexes; the larger the F value is, the higher the synchronous standard reaching realization level of a plurality of index targets is, and the stronger the technical practicability is.

The method for measuring the threshing and sheet-type characteristics of the tobacco leaves and the method for measuring the sheet-type control process have the following beneficial effects that:

1. according to the method for measuring the threshing characteristics of the tobacco leaves, provided by the invention, based on the conventional index detection data in the threshing process of the tobacco leaves, an evaluation function model of the processing resistance and the processing adaptability of the tobacco leaves is established, and the comprehensive objective evaluation of the actual threshing characteristics of the tobacco leaves is realized, so that the evaluation function model can be used as a reference basis for setting and adjusting the processing parameters of the tobacco leaves;

2. according to the method for determining the tobacco leaf type characteristics, provided by the invention, based on the conventional index detection data in the tobacco leaf threshing process, an evaluation function model of the tobacco leaf type structure suitability is established, and the evaluation of the tobacco leaf type suitability is realized;

3. the tobacco leaf type control process measuring method provided by the invention can be expanded and used for evaluating the comprehensive practicability of different process technologies, and therefore, the tobacco leaf type control process measuring method can be used as a reference basis for tobacco leaf type control process technologies.

Drawings

FIG. 1 is a graph showing the evaluation of the suitability P of a leaf type of tobacco and the technical utility F under various test conditions in example 1 of the present invention;

FIG. 2 is a graph showing the evaluation of the suitability of a conditioned tobacco leaf pattern for different threshing parameter tests in example 3 of the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.

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", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Example 1

S1, sampling and detecting;

in a certain redrying factory, 8 provinces of C2F tobacco leaves of Fujian, jiangxi, hunan, sichuan, henan, shandong, liaoning and Jilin are processed, and threshing test conditions are set as shown in table 1;

sampling every 1 hour according to YC/T146 tobacco leaf threshing and redrying process specification, and recording the sampling number N under each test condition _i (ii) a Detecting the leaf structure and the stem content in the leaf of the sample by adopting a standard method according to GB/T21137 determination of the size of the lamina of the tobacco leaf and GB/T21136 determination of the stem content in the threshed tobacco leaf;

TABLE 1 test conditions settings and number of samples

Remarking: selecting the tobacco leaves before processing, determining the category number after sorting according to the strictness of control requirements, if the purchased C2F grade tobacco leaves have the same overall quality and the unqualified tobacco leaves have the same characteristics when being put in storage and inspected, dividing the tobacco leaves into two categories of qualified tobacco leaves and unqualified tobacco leaves, namely two categories; if the uniformity is not good during warehousing and acceptance, and the doping times are more, the five categories of 'good', 'qualified', 'times', 'upper mixed' and 'lower mixed', namely five categories are divided. There are also three thirds and four quarters between the two. Different enterprise standards are different; the tobacco leaves are broken due to the reciprocating turning and conveying in the selecting process, and the results shown by threshing are influenced, so the tobacco leaves are listed as test conditions.

S2, removing abnormal values and calculating a qualified proportion;

comparing with the processing quality requirements shown in Table 2, all the large and medium flake rates (i.e. the sum of the large and medium flake rates), the powder rate and the stem content in the leaves which do not meet the requirements are classified as unqualified samples, and the number n of the remaining qualified samples is counted _i (ii) a Calculating the proportion w of qualified samples under each test condition according to the formula (1) _i ；

The formula (1) is:

in the formula, w _i The proportion of qualified samples under the ith test condition is shown; n is a radical of hydrogen _i Representing the total number of samples collected under the ith test condition; n is _i The number of qualified samples left after unqualified samples are removed under the ith test condition is represented;

TABLE 2 quality requirement and qualification ratio of each test condition

S3, calculating the mean value result of each detection index;

calculating the average value of each detection index data under each test condition by using the detection data of the qualified sample, including the large sheet rate DP _i Middle tablet ratio ZP _i Small fraction XP _i Fragment rate SP _i Fraction SM _i Stem content YG in leaves _i 。

S4, calculating an auxiliary index E for evaluating the threshing characteristics of the tobacco leaves; calculating tobacco leaf threshing characteristic evaluation auxiliary index E according to a formula (2) according to the detection index mean value obtained in the table 3; the formula (2) is:

in the formula, E _i Showing auxiliary indexes for evaluating the threshing characteristics of the tobacco under the ith test condition; YG _i Representing the mean cut-stem content of the tobacco leaves under the ith test condition; SP _i Representing the mean value of the fragment rate of the tobacco flakes under the ith test condition; SM _i The average value of the tobacco flake powder rate of the ith test condition is shown;

the auxiliary index E for evaluating the threshing characteristics of the tobacco leaves is a common expression result of the actions of the processing resistance and the processing strength of the tobacco leaves; the smaller the E value is, the poorer the processing resistance of tobacco leaf threshing or the larger the strength processing is;

from the perspective of a tobacco leaf selection mode before processing, tobacco leaves in Sichuan and Henan involve a five-division method and a dichotomy method for comparison, the tobacco leaves in two production areas show that the E value of the tobacco leaves in the five-division method is smaller, namely the tobacco leaves obtained by the five-division method have lower threshing performance than the tobacco leaves in the dichotomy method, because the tobacco leaves are damaged more seriously in the five-division process than the dichotomy method, so that the tobacco leaves are crushed more obviously in the processing process;

TABLE 3 mean value of the detection indexes of the respective test conditions

From the perspective of the frame fences used for threshing, fujian, jiangxi, hunan, sichuan and Liaoning tobacco leaves relate to the comparison of diamond-shaped frame fences and diamond-shaped-hexagonal combined frame fences, wherein the Fujian, jiangxi, hunan and Liaoning tobacco leaves all show that the E value under the combined frame fences is smaller, namely the threshing strength of the combined frame fences is larger than that of the diamond-shaped frame fences, because the opening size of the hexagonal frame fences used in the combined frame fences is smaller than that of the diamond-shaped frame fences, the leaves are crushed in the processing process; however, for Sichuan tobacco leaves, the E value under the diamond-shaped frame is smaller, which is probably because five-division selection is carried out simultaneously, and the selection effect is greater than the frame effect, namely the influence of the self processing resistance of the tobacco leaves on the threshing result exceeds the process adjustment;

s5, calculating the threshing characteristic Q of the tobacco leaves;

according to the evaluation auxiliary index E data obtained in the S4, the processing resistance Q of the tobacco leaves is calculated _A And processing suitability Q _B . Wherein:

tobacco leaf threshing processing-resistant Q _A The calculation is performed according to the formula (3),

the formula (3) is: q _A-m ＝max(E _m1 ,E _m2 ,…,E _mn )，

In the formula, Q _A-m Shows the threshing resistance of the mth tobacco leaf; e _m1 ,E _m2 ,…,E _mn The evaluation auxiliary index results of the mth tobacco under the 1 st and 2 nd process test conditions of 82303030are shown; max represents the maximum value;

adaptability to tobacco leaf threshing _B The calculation is performed according to the formula (4),

equation (4) is: q _B-m ＝range(E _m1 ,E _m2 ,…,E _mn )，

In the formula, Q _B-m Expressing the threshing processing adaptability of the mth tobacco leaf;E _m1 ,E _m2 ,…,E _mn the evaluation auxiliary index results of the mth tobacco under the 1 st and 2 nd process test conditions of 82303030are shown; range represents the difference between the maximum and minimum values.

Threshing processing resistance Q when comparing different tobacco leaves _A The larger the value is, the stronger the tobacco leaf threshing processing resistance is; defoliation processing resistance Q _B The smaller the value is, the stronger the adaptability of tobacco leaf threshing processing is, and the better the threshing quality stability is theoretically;

TABLE 4 evaluation results of tobacco leaf threshing characteristics

Regarding the resistance to the processing of tobacco leaves by threshing, the production areas Q _A The values are from big to small: jilin, fujian, jiangxi > Liaoning, sichuan, hunan > Shandong, henan. Namely, the Jilin, jiangxi and Fujian tobacco leaves have stronger processing resistance, while the Shandong and Henan tobacco leaves are poorer;

regarding the adaptability of tobacco leaf threshing, the tobacco leaves in Fujian, jiangxi, hunan and Liaoning are only related to the frame and fence comparison test, and Q is measured in each production area _B The values are Fujian, jiangxi, hunan and Liaoning from big to small, namely the threshing result of the Fujian tobacco leaves is easily influenced by the change of processing conditions, and the Liaoning tobacco leaves have stronger adaptability to the processing conditions;

viewed in combination, the producing zone Q _A The value difference is greater than the Q of each production zone _B The value shows that under the normal processing condition, the tobacco leaf threshing quality is mainly determined by the processing resistance, and the influence degree of the processing adaptability is relatively small;

s6, calculating the suitability P of the tobacco leaf type after threshing;

and (4) calculating the suitability P of the tobacco leaf type after threshing according to the detection index mean value obtained in the table 3 and a formula (5).

Equation (5) is:

in the formula, P _i The suitability of the tobacco leaf type under the ith test condition is shown; DP _i Representing the average value of the tobacco leaf large-piece rate under the ith test condition; ZP _i Representing the mean value of the tobacco leaf medium rate under the ith test condition; SP _i Representing the mean value of the tobacco fragment rate under the ith test condition; SM _i Representing the mean value of the tobacco powder rate under the ith test condition;

when the tobacco sheet structures obtained by different pretreatment or threshing process technologies of the same tobacco leaf are compared, the higher the P value is, the higher the level of 'reducing, increasing, controlling and crushing' is, and the better the sheet type suitability is;

the specific calculation results are shown in fig. 1.

From the perspective of using the frame fences for threshing, the tobacco leaves in Fujian, jiangxi, hunan, sichuan and Liaoning relate to the comparison of diamond-shaped frame fences and diamond-hexagonal combined frame fences, and each tobacco leaf shows that the P value under the combined frame fences is larger, namely the structural suitability of the tobacco leaf blade under the combined frame fences is better; further, the P value of the Hunan tobacco leaves under the full hexagonal frame is higher than that under the combined frame. This is because the hexagonal rail has a more regular opening and a smaller size than the diamond rail, and the "lower and middle height increasing" effect is better achieved, as shown in table 3.

Under the same diamond-shaped frame, the fitness P of Fujian, jiangxi, hunan and Sichuan tablets is close to and relatively low, and Liaoning and Jilin are used secondly, and Henan and Shandong are relatively high. Sheet type fitness P value and tobacco leaf threshing processing-resistant characteristic Q _A The values are approximately negative correlation.

From the perspective of the selection mode of the tobacco leaves before processing, the tobacco leaves in Sichuan and Henan are compared with the quintet method and the dichotomy method, the P value of the tobacco leaves in Sichuan is smaller than that of the tobacco leaves in Sichuan-quintet-rhombus, and the P value of the tobacco leaves in Henan is approximately equal to that of the tobacco leaves in Henan-quintet-rhombus. That is, the selection mode has no obvious influence on the sheet suitability or at least does not exceed the influence of the process adjustment such as the frame bar.

In conclusion, the fitness P value of the tobacco sheet after threshing is mainly influenced by the threshing characteristics of the raw materials and threshing section equipment parameters, and is not greatly related to the structural state of the tobacco incoming material.

S7, calculating the practicability F of the sheet type control process technology;

the sheet type control process technology utility F was calculated according to the formula (6) based on the tobacco leaf type fitness P and the acceptable sample ratio w reported in table 2.

Equation (6) is: f _i ＝P _i ×w _i

In the formula, F _i The practicability of the sheet type control process under the ith test condition is shown; p _i Indicating the suitability of the tobacco leaf type under the ith test condition; w is a _i And (4) showing the proportion of qualified tobacco samples under the ith test condition.

When the optimization adjustment is carried out on pretreatment before threshing, threshing process technology and the like of the same tobacco leaves by aiming at improving the tobacco leaf type suitability, the larger the F value is, the higher the comprehensive realization level in the aspects of improving the leaf type suitability and guaranteeing the basic quality index is, the stronger the technical practicability is.

The specific calculation results are shown in fig. 1.

From the perspective of using the frame fence for threshing, the tobacco leaves in Fujian, jiangxi, hunan, sichuan and Liaoning relate to the comparison of a diamond frame fence and a diamond-hexagon combined frame fence, and each tobacco leaf shows that the F value under the combined frame fence is larger, namely the combined frame fence technology has stronger practicability for obtaining the tobacco sheets with proper sheet types and standard basic quality; however, although the P value of the Hunan tobacco leaves is the highest under the full hexagonal frame fence, the F value is lower than that under the combined frame fence, because the ratio w meeting the quality requirement is lower because the leaves are broken and crushed more seriously under the hexagonal frame fence, as shown in tables 2 and 3, the full hexagonal frame fence has poor practicability.

From the perspective of the tobacco leaf selection method before processing, the tobacco leaves in Sichuan and Henan are compared by the quintet method and the dichotomy method, and the F value of the quintet method is lower than that of the dichotomy method in both aspects, because the quintet method does not improve the sheet type suitability P value, but the tobacco leaves are damaged to a greater extent due to the selection process, so that the proportion w meeting the quality requirement is lower, as shown in tables 2 and 3, and therefore, the quintet method selection is not as practical as the dichotomy method from the perspective of threshing.

Example 2

The method takes the data of the literature that the influence of a slitting processing mode on the quality of cured tobacco leaves after threshing (Yang, yangyao, oumei and Ying, etc.. Guizhou agricultural science 2019,47 (03): 147-150) as an example for verification.

S1, sampling and detecting;

in a certain redrying plant, slitting tests are set for the processing process of the tobacco leaves of the No. 1 Cuibi variety with three grades of X2F, C3F and B2F in Fujian Sanming in 2017: t1, processing a 'two-section' leaf removing base part, cutting off the leaf by a cutter at a position 18-20cm away from the leaf base part, and processing a leaf body part; t2, processing the whole leaves in a two-section mode, cutting off the middle position of each leaf by using a cutter, and simultaneously processing the two sections of tobacco leaves; t3, processing the whole leaves in a three-section mode, dividing the tobacco leaves into three sections by using a cutter according to a proportion, and simultaneously processing the three sections of the tobacco leaves.

Processing by adopting conventional process parameters, sampling 1 time every 60min at the boxing position after redrying, sampling 5kg each time, and taking 6 times in total; measuring the leaf structure and the stem content in the leaf according to GB/T21137 and GB/T21136;

s2, removing abnormal values, and calculating a qualified proportion;

because the query cannot be carried out, all samples are uniformly considered to meet the quality requirement, namely the qualification rate is 100%;

s3, calculating the mean value result of each detection index;

referring to table 3 of the original text, only mean data are cited.

S4, calculating an auxiliary index E for evaluating the threshing characteristics of the tobacco leaves;

and (3) calculating the tobacco leaf threshing characteristic evaluation auxiliary index E according to the detection index mean value obtained in the table 5 and the formula (2).

The formula (2) is:

in the formula, E _i Showing auxiliary indexes for evaluating the threshing characteristics of the tobacco under the ith test condition; YG _i Representing the mean cut-stem content of the tobacco leaves under the ith test condition; SP _i The average value of the fragment rate of the tobacco flakes under the ith test condition is shown; SM _i The average value of the tobacco flake shatter rate of the ith test condition is shown.

S5, calculating the threshing characteristic Q of the tobacco leaves;

according to the evaluation auxiliary index E data obtained in the S4, the processing resistance Q of the tobacco leaves is calculated _A And processing suitability Q _B 。

TABLE 5 mean value of structural indexes of processed tobacco leaves in different grade slitting test

TABLE 6 evaluation of threshing characteristics and sheet suitability of tobacco leaves in different grade slitting tests

Wherein: tobacco threshing processing resistance Q _A The calculation is performed according to the formula (3),

the formula (3) is: q _A-m ＝max(E _m1 ,E _m2 ,…,E _mn )；

In the formula, Q _A-m Shows the threshing resistance of the mth tobacco leaf; e _m1 ,E _m2 ,…,E _mn The method comprises the steps of (1) representing the evaluation auxiliary index results of the mth tobacco leaves under the 1 st and 2 nd process test conditions, 82303030indicating the nth process test conditions; max indicates the maximum value to be found.

equation (4) is: q _B-m ＝range(E _m1 ,E _m2 ,…,E _mn )；

In the formula, Q _B-m Expressing the threshing processing adaptability of the mth tobacco leaf; e _m1 ,E _m2 ,…,E _mn The evaluation auxiliary index results of the mth tobacco under the 1 st and 2 nd process test conditions of 82303030are shown; range represents the difference between the maximum and minimum values.

Threshing processing resistance Q when comparing different tobacco leaves _A The larger the value is, the stronger the tobacco leaf threshing processing resistance is; defoliation processability resistance Q _B The smaller the value, the more the tobacco leaves are threshedThe stronger the processing adaptability, the better the threshing quality stability theoretically.

Three grades Q for the resistance to processing of tobacco leaves _A The values are from large to small: B2F is not less than C3F > X2F, namely the processing resistance is gradually deteriorated. The method is consistent with the article conclusion that the lower tobacco leaves are lower than the middle and upper tobacco leaves in physical indexes (tensile strength, elongation at break, leaf weight and the like), and a flexible processing mode is adopted, and the upper tobacco leaves are high in processing resistance.

Three grades Q about adaptability of tobacco leaf threshing processing _B The values are C3F > B2F > X2F from large to small, namely the threshing result of the C3F tobacco leaves is most susceptible to the change of the cutting mode, and the adaptability of the X2F tobacco leaves to the cutting mode is stronger. On the other hand, C3F and B2F both show that the value E of the T3 test group is minimum, namely the processing strength is maximum, and the processing strength is consistent with the visual feeling that the actual three-section type slitting is stronger than the actual two-section type slitting.

S6, calculating the suitability P of the tobacco leaf type after threshing;

and (4) calculating the suitability P of the tobacco leaf type after threshing according to the detection index mean value obtained in the table 5 and a formula (5).

Equation (5) is:

in the formula, P _I Indicating the suitability of the tobacco leaf type under the ith test condition; DP _i Representing the average value of the tobacco leaf large-piece rate under the ith test condition; ZP _i Representing the mean value of the tobacco leaf medium rate under the ith test condition; SP _i Representing the mean value of the tobacco fragment rate under the ith test condition; SM _i The tobacco dust rate is shown under the ith test condition.

In terms of sheet suitability, the maximum P value points of X2F, C3F and B2F tobacco leaves are respectively shown in T2, T1 and T3. The method is consistent with the article conclusion that the leaf structure of the T2X 2F-grade roasted tobacco strips is optimal, the leaf structure of the T1C 3F-grade roasted tobacco strips is optimal, and the leaf structure of the T3B 2F-grade roasted tobacco strips is optimal, but the article does not provide the basis of the conclusion, and the method can be better used for supporting.

Example 3

The data of the literature, "optimization research of threshing parameters for improving the applicability of the blade structure" (Jirongsheng, xuanhuai, etc. Anhui agricultural science 2020,48 (09): 193-196) are taken as an example for verification.

S1, sampling and detecting

Orthogonal tests are set for 3 threshing parameters of material flow, shape and size of an opening of a frame fence and rotation speed of a threshing roller in the processing process of C3F grade tobacco of 2016 type Henan Sanxia Yunyan tobacco in a redrying plant.

The sampling and detection of the process quality are carried out according to an industry standard method YC/T146 tobacco threshing and redrying process specification.

TABLE 7 different threshing parameters test conditions settings

S2, removing abnormal values and calculating the qualified proportion

Because the query cannot be carried out, all samples are uniformly considered to meet the quality requirement, namely the qualification rate is 100%.

S3, calculating the mean value result of each detection index

Referring to table 2 in the text, the column "large to medium fraction" is not cited.

This embodiment does not focus on the threshing characteristic, and skips S4 and S5.

S6, calculating the suitability degree P of the tobacco leaf type after threshing

And (4) calculating the suitability P of the tobacco leaf type after threshing according to a formula (5) according to the detection index mean value obtained in the table 8.

Equation (5) is:

in the formula, P _i Indicating the suitability of the tobacco leaf type under the ith test condition; DP _i Representing the average value of the tobacco leaf large-piece rate under the ith test condition; ZP _i Representing the mean value of the tobacco leaf medium rate under the ith test condition; SP _i Representing the mean value of the tobacco fragment rate under the ith test condition; SM _i Indicates the i-th testConditional mean value of tobacco dust rate.

The specific calculation results are shown in fig. 2.

In order to determine the optimal processing conditions, the original seal firstly carries out data standardization on benefit indexes such as medium piece rate, large and medium piece rate and cost indexes such as large piece rate, leaf stem content and the like; then, weighting each index according to experience; and finally, calculating the comprehensive score by a weighting method.

Comparing the sheet type fitness score calculated by the method with the comprehensive score of the article, the seven indexes are sequenced consistently except that the two sequences of T1 and T9 are interchanged although the orders are different.

TABLE 8 mean value of structural indexes of tobacco leaves after processing in different threshing parameter tests

In summary, the evaluation method for the tobacco leaf threshing characteristics and the sheet type control process effects provided by the invention is based on the conventional index detection data of the tobacco leaf threshing process, and based on the essence of the threshing process and the index association relationship, the objective, simple, convenient and accurate evaluation on the actual threshing characteristics and the sheet type structure suitability of the tobacco leaves is realized, and the setting adjustment of tobacco leaf processing parameters and the optimization of the sheet type control process technology can be guided. Therefore, the invention effectively overcomes various defects in the prior art and has high practical application value.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The method for measuring the threshing characteristics of the tobacco leaves is characterized by comprising the following steps of:

the formula (1) is:

in the formula, w _i Represents the ratio of the qualified samples, N, under the i-th test condition _i Denotes the total number of samples collected under the i-th test condition, n _i The number of qualified samples left after unqualified samples are removed under the ith test condition is represented;

the auxiliary index E for evaluating the threshing characteristics of the tobacco leaves is calculated according to a formula (2),

the formula (2) is:

in the formula, E _i The auxiliary index of tobacco leaf threshing characteristic evaluation under the ith test condition is represented; YG _i Representing the mean cut-stem content of the tobacco leaves under the ith test condition; SP _i The average value of the fragment rate of the tobacco flakes under the ith test condition is shown; SM _i The average value of the tobacco flake powder rate of the ith test condition is shown;

s5, calculating the threshing characteristic Q of the tobacco leaves according to the auxiliary index E; the threshing characteristic Q of tobacco leaves includes the processing resistance Q _A And processing suitability Q _B ；

The tobacco leaves have the threshing characteristic and the processing resistance Q _A The calculation is performed according to the formula (3),

the formula (3) is: q _A-m ＝max(E _m1 ,E _m2 ,…,E _mn )，

In the formula, Q _A-m Indicates the mth kind of tobacco leavesThe resistance to processing of the threshing characteristics of (1); e _m1 ,E _m2 ,…,E _mn The method comprises the steps of (1) representing the evaluation auxiliary indexes of the mth tobacco leaves under the 1 st and 2 nd process test conditions of 823030303030nTth tobacco leaves; max represents the maximum value;

equation (4) is: q _B-m ＝range(E _m1 ,E _m2 ,…,E _mn )，

In the formula, Q _B-m The processing adaptability of the threshing characteristics of the mth tobacco leaves is shown; e _m1 ,E _m2 ,…,E _mn The evaluation auxiliary indexes of the mth tobacco under the 1 st and 2 nd process test conditions of the mth tobacco are shown; range represents the difference between the maximum and minimum values.

2. The method for determining tobacco threshing characteristics according to claim 1, wherein in step S1, the types of test conditions include, but are not limited to, comparison of different tobacco leaf types, comparison of different pretreatment types, and comparison of different threshing process types.

3. The method for measuring threshing characteristics of tobacco leaves according to claim 2, wherein in the step S1, the types of the tobacco leaves include, but are not limited to, one or a combination of producing area, grade and composition ratio.

4. The method for measuring the threshing performance of tobacco leaves according to claim 2, wherein in the step S1, the pretreatment types include, but are not limited to, different treatment modes or different combinations of picking, feeding, slitting, dampening and moistening before threshing, or different treatment strengths of picking, slitting, dampening and moistening before threshing.

5. The method for measuring the threshing characteristics of tobacco leaves according to claim 2, wherein in the step S1, the threshing process types comprise that one element or a combination element of the threshing process is different;

elements of the threshing process include, but are not limited to, a threshing process path, a threshing equipment device type, and threshing equipment parameters;

a threshing process path for realizing the separation of leaves and stems or adjusting the processing process of the structure of the tobacco lamina;

the threshing process route includes but is not limited to feeding, threshing, sieving after threshing and shearing;

types of threshing device devices include, but are not limited to, feeders, threshing machines, air separators, belt conveyors, built-in frame rails, stationary knives, moving knives, rotors, throwing rollers, and vibrating screens;

the threshing equipment parameters include, but are not limited to, the rotation speed of the threshing rollers of different threshing units, the air separation frequency of different air separation units and the tobacco flow.

6. The method for measuring the threshing characteristics of tobacco leaves according to claim 1, wherein in step S1, the tobacco leaves after threshing and threshing are the tobacco leaves before redrying after threshing or the tobacco leaves after redrying.

7. The method for measuring threshing characteristics of tobacco leaves according to claim 1, wherein in the step S1, sampling is performed according to one or a combination of YC/T146 "specifications for threshing and redrying of tobacco leaves" and YC/T147 "quality inspection of threshed tobacco leaves";

in the step S1, the detection mode is executed according to one item or the combination of GB/T21137 measurement of tobacco lamina size and GB/T21136 measurement of stem content in threshing tobacco leaves;

in the step S2, the processing quality requirement comprises one or a combination of quality indexes of YC/T146 tobacco threshing and redrying process specification and YC/T147 tobacco threshing and quality inspection;

in the step S1, the detected indexes comprise one or a combination of a large fragment rate DP, a medium fragment rate ZP, a large and medium fragment rate DZP, a small fragment rate XP, a fragment rate SP, a powder rate SM and a stem content YG in leaves; in the step S1, the large sheet rate DP is the proportion of the tobacco flakes with the specification of more than 25.4mm multiplied by 25.4mm in the sample; the large and medium flake rate DZP refers to the proportion of the tobacco flakes with the specification of more than 12.7mm multiplied by 12.7mm in the sample, namely the sum of the large flake rate and the medium flake rate; the small piece ratio XP refers to the proportion of the tobacco flakes with the specification of 6.35mm multiplied by 6.35mm-12.7mm multiplied by 12.7mm in the sample; the fragment rate SP refers to the proportion of the tobacco flakes with the specification of 2.36mm multiplied by 2.36mm-6.35mm multiplied by 6.35mm in the sample; the powder rate SM refers to the proportion of the tobacco flakes with the specification of less than 2.36mm multiplied by 2.36mm in the sample; the peduncle content YG in the leaf means the weight of the cabo with diameter larger than and equal to 1.5mm is the percentage of the total weight of the tobacco sample.

8. The method for measuring the threshing performance of tobacco leaves according to claim 7, wherein in the step S2, the quality index comprises one or a combination of a large piece ratio DP, a medium piece ratio ZP, a large and medium piece ratio DZP, a small piece ratio XP, a fragment ratio SP, a fragment ratio SM and a peduncle content YG in the leaves;

in the step S2, the sample which does not meet the processing quality requirement is any sample which does not meet the processing quality requirement in the quality index;

in the step S2, the qualified samples refer to all samples with quality index detection results meeting the processing quality requirements;

in the step S3, the detection index is one or a combination of a large fragment rate DP, a medium fragment rate ZP, a small fragment rate XP, a fragment rate SP, a powder rate SM and a stem content YG in leaves;

in step S3, if no qualified sample exists, the processing mode is rejected, the step is terminated, or the processing mode is adjusted and then sampling is carried out again to execute the steps S1-S3.

9. The method for measuring the threshing performance of tobacco leaves according to claim 1, wherein in step S4, the auxiliary index E for evaluating the threshing performance of tobacco leaves is used for indicating the level of the stalk content in the tobacco leaves of the obtained tobacco leaves under the same degree of crushing, or the level of the stalk content in the tobacco leaves reaching the same degree, the index of the breakage resistance of the tobacco leaves.

10. The method for measuring threshing characteristics of tobacco leaves according to claim 1, wherein in step S4, the auxiliary index E for evaluating threshing characteristics of tobacco leaves is used to indicate a common performance index of actions of the resistance to processing and the processing strength of tobacco leaves.

11. The method for measuring tobacco leaf threshing characteristics according to claim 1, wherein in step S5, Q _A-m Used to express the processing resistance of the threshing characteristics of the mth tobacco leaves under the most suitable processing conditions; in step S5, the processing resistance Q of the threshing characteristics of different tobacco leaves _A ，Q _A The value is positively correlated with the resistance to processing of threshing properties;

in step S5, for the mth tobacco leaf, the auxiliary index E is evaluated _m The value is inversely related to threshing processing strength;

in step S5, Q _B-m The method is used for showing the variation degree of threshing characteristics of the mth tobacco leaves under different processing conditions, namely the adaptability to threshing processing strength;

in step S5, threshing and processing resistance Q of different tobacco leaves _B ，Q _B The value is inversely related to the adaptability of the tobacco threshing process.

12. A tobacco leaf type characteristic measuring method using the tobacco leaf threshing characteristic measuring method according to any one of claims 1 to 11, characterized by comprising the steps of S6, calculating a tobacco leaf type suitability P based on a detection index mean value;

the tobacco lamina type fitness P is calculated according to the formula (5),

the formula (5) is:

in the formula, P _i Indicating the suitability of the tobacco leaf type under the ith test condition; DP _i Representing the average value of the tobacco leaf large-piece rate under the ith test condition; ZP _i Representing the mean value of the tobacco leaf medium rate under the ith test condition; SP _i Representing the mean value of the tobacco fragment rate under the ith test condition; SM _i Representing the average value of the tobacco shred crushing rate under the ith test condition;

the tobacco leaf type suitability P is used for expressing the sheet type suitability, the P value is positively correlated with the sheet type suitability, and the P value is positively correlated with an index for realizing 'reduction, improvement, centering and crushing control' after processing.

13. A method of measuring a lamina-type control process using the method of measuring a lamina-type characteristic according to claim 12, wherein in step S7, a sheet-type control process utility F is calculated based on the lamina-type fitness P and the percentage w of acceptable samples;

calculating the sheet type control process practicability F according to a formula (6);

equation (6) is: f _i ＝P _i ×w _i ，

In the formula, F _i The practicability of the sheet type control process under the ith test condition is shown; p _i Indicating the suitability of the tobacco leaf type under the ith test condition; w is a _i The proportion of qualified tobacco samples under the ith test condition is shown.

The sheet type control process practicability F is used for representing a comprehensive realization index of a certain sheet type control process in the aspects of improving sheet type fitness and guaranteeing basic quality index; the F value is positively correlated with the practicability of the sheet type control process.