阅读说明：本技术 一种铺叶布料均匀性的控制方法及系统 (Method and system for controlling uniformity of leaf laying and distributing ) 是由 刘茂林 赵森森 白银帅 刘向真 牛洋洋 王根发 彭玉富 于 2019-11-29 设计创作，主要内容包括：本发明提供一种铺叶布料均匀性的控制方法及系统,该方法包括：获取配方打叶中的烟叶原料配方比例,并根据烟叶原料配方比例确定每个等级烟叶的铺叶比例；获取铺叶工序中的铺叶总工位个数,并根据铺叶总工位个数和所述铺叶比例确定每个等级烟叶所占铺叶工位个数；按烟叶原料配方比例和每个等级烟叶所占铺叶工位个数对烟叶进行铺叶；计算各个工位对应的相邻工位中铺设的不同等级烟叶所对应的工位个数与总相邻工位个数的比值,并对每个工位对应的比值进行求和,求得和值与实际铺叶工位总个数相比得到第一比值均值；如果第一比值均值小于第一阈值,则重复上述步骤,以再次进行铺叶排序。本发明能提高烟草铺叶的均匀性,保证成品片烟质量的稳定性。(The invention provides a method and a system for controlling the uniformity of leaf laying and distributing, wherein the method comprises the following steps: obtaining the formula proportion of tobacco leaf raw materials in formula threshing, and determining the leaf spreading proportion of each grade of tobacco leaf according to the formula proportion of the tobacco leaf raw materials; acquiring the number of total leaf spreading stations in the leaf spreading procedure, and determining the number of leaf spreading stations occupied by each grade of tobacco leaves according to the number of the total leaf spreading stations and the leaf spreading proportion; spreading the tobacco leaves according to the proportion of the tobacco leaf raw material formula and the number of spreading stations occupied by each grade of tobacco leaves; calculating the ratio of the number of stations corresponding to different grades of tobacco laid in adjacent stations corresponding to each station to the total number of adjacent stations, summing the ratio corresponding to each station, and comparing the sum with the total number of actual leaf laying stations to obtain a first ratio mean value; and if the first ratio mean value is smaller than the first threshold value, repeating the steps to perform leaf paving sorting again. The invention can improve the uniformity of tobacco leaf spreading and ensure the stability of the quality of finished tobacco sheets.)

1. A method for controlling the uniformity of leaf-laying cloth is characterized by comprising the following steps:

obtaining the formula proportion of tobacco leaf raw materials in formula threshing, and determining the leaf spreading proportion of each grade of tobacco leaf according to the formula proportion of the tobacco leaf raw materials;

acquiring the number of total leaf spreading stations in the leaf spreading procedure, and determining the number of leaf spreading stations occupied by each grade of tobacco leaves according to the number of the total leaf spreading stations and the leaf spreading proportion;

spreading the tobacco leaves according to the proportion of the tobacco leaf raw material formula and the number of spreading stations occupied by each grade of tobacco leaves;

calculating the ratio of the number of stations corresponding to different grades of tobacco laid in adjacent stations corresponding to each station to the total number of adjacent stations, summing the ratio corresponding to each station, and comparing the sum with the total number of actual leaf laying stations to obtain a first ratio mean value;

and if the first ratio mean value is smaller than a first threshold value, repeating the steps to perform leaf spreading sorting again.

2. The method for controlling the uniformity of the spread cloth according to claim 1, further comprising:

calculating the ratio of the number of stations corresponding to the same-grade tobacco laid in the adjacent stations corresponding to each station to the total number of the adjacent stations, summing the ratio corresponding to each station, and comparing the sum with the total number of the actual leaf laying stations to obtain a second ratio mean value;

and if the second ratio mean value is larger than a second threshold value, re-performing leaf paving and sorting until the second ratio mean value is smaller than the second threshold value, wherein the second threshold value is smaller than the first threshold value.

3. The method for controlling the uniformity of the spread cloth according to claim 2, further comprising:

listing all leaf paving modes through a computer setting program, and calculating the first ratio mean value or the second ratio mean value corresponding to each leaf paving mode;

and comparing the first ratio mean value or the second ratio mean value corresponding to the leaf paving mode, and selecting the leaf paving mode corresponding to the largest first ratio mean value or the smallest second ratio mean value for leaf paving and material distribution.

4. A method of controlling the uniformity of a spread sheet material as claimed in claim 3, further comprising:

selecting an optimal leaf paving mode to pave leaves, and calculating the sample loading amount of each grade of tobacco leaves in one leaf paving period according to the flow, the feeding period and the proportion of each grade of tobacco leaves;

and adjusting the sample loading amount of each leaf spreading station according to the principle that the total weight of each belt is consistent.

5. A method as claimed in any one of claims 1 to 4, wherein the leading and trailing stations in the leaf laying process are used as adjacent stations when calculating the adjacent stations.

6. A method for controlling the uniformity of a spread sheet according to any one of claims 1 to 4, wherein when the number of the stations is calculated, and when a decimal occurs, an integer is reserved according to a rounding principle; if the number of the stations obtained by rounding is consistent with the number of the actual stations, the stations are directly used, and if the number of the stations is not consistent, the number of the stations with the largest proportion in the formula components is adjusted, so that the sum of the number of the stations occupied by each grade is equal to the number of the actual stations.

7. A control system for uniformity of leaf-laying cloth, comprising:

the tobacco leaf spreading proportion obtaining unit is used for obtaining the tobacco leaf raw material formula proportion in the formula threshing, and determining the tobacco leaf spreading proportion of each grade of tobacco leaves according to the tobacco leaf raw material formula proportion;

the station number acquiring unit is used for acquiring the total station number of the spread leaves in the leaf spreading procedure and determining the number of the leaf spreading stations occupied by each grade of tobacco leaves according to the total station number of the spread leaves and the leaf spreading proportion;

the leaf paving unit is used for paving the tobacco leaves according to the proportion of the tobacco leaf raw material formula and the number of leaf paving stations occupied by each grade of tobacco leaves;

the first calculation unit is used for calculating the ratio of the number of stations corresponding to different grades of tobacco laid in the adjacent stations corresponding to each station to the total number of the adjacent stations, summing the ratio corresponding to each station, and comparing the sum with the total number of the actual leaf laying stations to obtain a first ratio mean value;

and the control unit is used for re-performing the leaf-spreading sequencing and calculating the first ratio mean value when the first ratio mean value is smaller than a first threshold value.

8. A system for controlling the uniformity of a spread sheet material as claimed in claim 7, further comprising:

the second calculation unit is used for calculating the ratio of the number of stations corresponding to the same-grade tobacco laid in the adjacent stations corresponding to each station to the total number of the adjacent stations, summing the ratio corresponding to each station, and obtaining a second ratio mean value by comparing the sum value with the total number of the actual leaf laying stations;

the control unit is further configured to perform leaf-spreading sorting again when the second ratio mean is greater than a second threshold value, until the second ratio mean is less than the second threshold value, where the second threshold value is less than the first threshold value.

9. A system for controlling the uniformity of a spread sheet material as claimed in claim 8, further comprising:

a leaf-spreading enumeration unit, configured to enumerate all leaf-spreading manners through a computer setting program, and calculate the first ratio sum or the second ratio sum corresponding to each leaf-spreading manner;

and the leaf paving mode determining unit is used for comparing the first ratio mean value or the second ratio mean value corresponding to the leaf paving mode in size, and selecting the leaf paving mode corresponding to the largest first ratio mean value or the smallest second ratio mean value for leaf paving and material distribution.

10. A system for controlling the uniformity of a spread sheet material as claimed in claim 9, further comprising:

the sample loading amount calculation unit is used for selecting an optimal leaf paving mode to pave leaves and calculating the sample loading amount of each grade of tobacco leaves in one leaf paving period according to the flow, the feeding period and the proportion of each grade of tobacco leaves;

and the sample loading amount calculation unit is also used for adjusting the sample loading amount of each leaf paving station according to the principle that the total weight of each belt is consistent.

Technical Field

The invention relates to the technical field of tobacco processing, in particular to a method and a system for controlling the uniformity of leaf laying and distributing.

Background

With the increasing of the innovation and adjustment of the tobacco industry, large groups and large brands gradually form, and the problem that tobacco raw material supply enterprises must face is how to stably provide raw materials with consistent quality level, harmonious internal chemical components and certain scale. The method for threshing the formula is an effective way for solving the problem. The quality of the formula threshing quality is an important factor for determining the quality of the cigarette products. At present, the uniformity evaluation of formula threshing in the tobacco industry is evaluated according to the nicotine variation coefficient of finished tobacco strips. The research results of Xiaoming gift, Yangkai and the like show that: the homogenization processing level of threshing and redrying can be obviously improved by changing the existing leaf laying and feeding mode. However, in the redrying plant, only the cross-opening of tobacco leaves of different grades is considered when the tobacco leaf spreading and distributing scheme is achieved, and no theoretical basis exists, so that the uniformity of the formula cannot be guaranteed to the greatest extent. For tobacco industry enterprises, the significance of nicotine variation coefficient of finished tobacco lamina is to understand the quality of the finished tobacco lamina to a greater extent, the uniformity of formula threshing cannot be understood in the processing period, and the timeliness is not provided for feedback guidance production. Therefore, the method has important significance on controlling the spreading uniformity in the tobacco leaf processing process.

Disclosure of Invention

The invention provides a method and a system for controlling the uniformity of leaf laying and distributing, which solve the problem that the quality level is inconsistent when the existing tobacco is laid on different grades of tobacco leaves according to the formula, improve the uniformity of tobacco leaf laying and ensure the stability of the quality of finished tobacco strips.

In order to achieve the above purpose, the invention provides the following technical scheme:

a method for controlling the uniformity of leaf-laying cloth comprises the following steps:

obtaining the formula proportion of tobacco leaf raw materials in formula threshing, and determining the leaf spreading proportion of each grade of tobacco leaf according to the formula proportion of the tobacco leaf raw materials;

acquiring the number of total leaf spreading stations in the leaf spreading procedure, and determining the number of leaf spreading stations occupied by each grade of tobacco leaves according to the number of the total leaf spreading stations and the leaf spreading proportion;

spreading the tobacco leaves according to the proportion of the tobacco leaf raw material formula and the number of spreading stations occupied by each grade of tobacco leaves;

calculating the ratio of the number of stations corresponding to different grades of tobacco laid in adjacent stations corresponding to each station to the total number of adjacent stations, summing the ratio corresponding to each station, and comparing the sum with the total number of actual leaf laying stations to obtain a first ratio mean value;

and if the first ratio mean value is smaller than a first threshold value, repeating the steps to perform leaf spreading sorting again.

Preferably, the method further comprises the following steps:

calculating the ratio of the number of stations corresponding to the same-grade tobacco laid in the adjacent stations corresponding to each station to the total number of the adjacent stations, summing the ratio corresponding to each station, and comparing the sum with the total number of the actual leaf laying stations to obtain a second ratio mean value;

and if the second ratio mean value is larger than a second threshold value, re-performing leaf paving and sorting until the second ratio mean value is smaller than the second threshold value, wherein the second threshold value is smaller than the first threshold value.

Preferably, the method further comprises the following steps:

listing all leaf paving modes through a computer setting program, and calculating the first ratio mean value or the second ratio mean value corresponding to each leaf paving mode;

and comparing the first ratio mean value or the second ratio mean value corresponding to the leaf paving mode, and selecting the leaf paving mode corresponding to the largest first ratio mean value or the smallest second ratio mean value for leaf paving and material distribution.

Preferably, the method further comprises the following steps:

selecting an optimal leaf paving mode to pave leaves, and calculating the sample loading amount of each grade of tobacco leaves in one leaf paving period according to the flow, the feeding period and the proportion of each grade of tobacco leaves;

and adjusting the sample loading amount of each leaf spreading station according to the principle that the total weight of each belt is consistent.

Preferably, when the adjacent stations are calculated, the head station and the tail station in the leaf paving procedure are taken as the adjacent stations.

Preferably, when the number of the stations is calculated and decimal occurs, integers are reserved according to a rounding principle; if the number of the stations obtained by rounding is consistent with the number of the actual stations, the stations are directly used, and if the number of the stations is not consistent, the number of the stations with the largest proportion in the formula components is adjusted, so that the sum of the number of the stations occupied by each grade is equal to the number of the actual stations.

The invention provides a control system for the uniformity of leaf spreading and distributing, which comprises:

the tobacco leaf spreading proportion obtaining unit is used for obtaining the tobacco leaf raw material formula proportion in the formula threshing, and determining the tobacco leaf spreading proportion of each grade of tobacco leaves according to the tobacco leaf raw material formula proportion;

the station number acquiring unit is used for acquiring the total station number of the spread leaves in the leaf spreading procedure and determining the number of the leaf spreading stations occupied by each grade of tobacco leaves according to the total station number of the spread leaves and the leaf spreading proportion;

the leaf paving unit is used for paving the tobacco leaves according to the proportion of the tobacco leaf raw material formula and the number of leaf paving stations occupied by each grade of tobacco leaves;

the first calculation unit is used for calculating the ratio of the number of stations corresponding to different grades of tobacco laid in the adjacent stations corresponding to each station to the total number of the adjacent stations, summing the ratios corresponding to each station to obtain a first ratio sum, and obtaining a first ratio mean value by comparing the sum with the actual total number of the tobacco laying stations;

and the control unit is used for re-performing the leaf-spreading sequencing and calculating the first ratio mean value when the first ratio sum is smaller than a first threshold value.

Preferably, the method further comprises the following steps:

the second calculation unit is used for calculating the ratio of the number of stations corresponding to the same-grade tobacco laid in the adjacent stations corresponding to each station to the total number of the adjacent stations, summing the ratios corresponding to each station to obtain a second ratio sum, and obtaining a second ratio mean value by comparing the sum with the actual total number of the leaf laying stations;

the control unit is further configured to perform leaf-spreading sorting again when the second ratio mean is greater than a second threshold value, until the second ratio mean is less than the second threshold value, where the second threshold value is less than the first threshold value.

Preferably, the method further comprises the following steps:

the leaf-spreading enumeration unit is used for enumerating all leaf-spreading modes through a computer setting program and calculating the first ratio mean value or the second ratio mean value corresponding to each leaf-spreading mode;

and the leaf paving mode determining unit is used for comparing the first ratio mean value or the second ratio mean value corresponding to the leaf paving mode in size, and selecting the leaf paving mode corresponding to the largest first ratio mean value or the smallest second ratio mean value for leaf paving and material distribution.

Preferably, the method further comprises the following steps:

the sample loading amount calculation unit is used for selecting an optimal leaf paving mode to pave leaves and calculating the sample loading amount of each grade of tobacco leaves in one leaf paving period according to the flow, the feeding period and the proportion of each grade of tobacco leaves;

and the sample loading amount calculation unit is also used for adjusting the sample loading amount of each leaf paving station according to the principle that the total weight of each belt is consistent.

The invention provides a method and a system for controlling the uniformity of spreading and distributing materials, which solve the problem that the quality level is inconsistent when the existing tobacco is spread according to the formula, the uniformity of spreading tobacco leaves can be improved, and the stability of the quality of finished tobacco sheets can be ensured.

Drawings

In order to more clearly describe the specific embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below.

FIG. 1 is a flow chart of a method for controlling the uniformity of the leaf-laying cloth provided by the invention.

Detailed Description

In order to make the technical field of the invention better understand the scheme of the embodiment of the invention, the embodiment of the invention is further described in detail with reference to the drawings and the implementation mode.

Aiming at the problem that the quality of finished tobacco sheets is inconsistent due to different grades of the current tobacco raw materials. The invention provides a method and a system for controlling the uniformity of spreading and distributing materials, which solve the problem that the quality level is inconsistent when the existing tobacco is spread according to the formula, the uniformity of spreading tobacco leaves can be improved, and the stability of the quality of finished tobacco sheets can be ensured.

As shown in fig. 1, a method for controlling the uniformity of a leaf-laying cloth includes:

s1: obtaining the formula proportion of tobacco leaf raw materials in formula threshing, and determining the leaf spreading proportion of each grade of tobacco leaf according to the formula proportion of the tobacco leaf raw materials;

s2: acquiring the number of total leaf spreading stations in the leaf spreading procedure, and determining the number of leaf spreading stations occupied by each grade of tobacco leaves according to the number of the total leaf spreading stations and the leaf spreading proportion;

s3: spreading the tobacco leaves according to the proportion of the tobacco leaf raw material formula and the number of spreading stations occupied by each grade of tobacco leaves;

s4: calculating the ratio of the number of stations corresponding to different grades of tobacco laid in adjacent stations corresponding to each station to the total number of adjacent stations, summing the ratios corresponding to each station to obtain a first ratio sum, and comparing the sum with the total number of actual leaf laying stations to obtain a first ratio mean value;

s5: and if the first ratio mean value is smaller than a first threshold value, repeating the steps to perform leaf spreading sorting again.

Specifically, for a leaf paving condition, calculating the ratio of the number of stations corresponding to different grades of tobacco leaves paved in adjacent stations corresponding to each station to the total number of adjacent stations, summing the calculated ratios to obtain a ratio sum, and obtaining a ratio mean value α by comparing the sum with the actual total number of the leaf paving stations, wherein the uniformity is defined as the uniformity under the leaf paving condition, the larger the ratio sum is, the higher the leaf paving uniformity is, and otherwise, the lower the uniformity is, the invention can improve the leaf paving uniformity, keep the quality of finished tobacco strips consistent, and improve the quality stability of finished tobacco strips by paving the tobacco leaves with different grades from the station at the periphery of each station, wherein the solving of the ratio mean value α is as follows:

wherein α is the mean value of the ratio, x_iThe number y of the station paves adjacent to the ith station and the leaf paving grade of the station is different_iThe total number of the stations adjacent to the ith station is, and i is the total number of the leaf laying stations.

The method further comprises the following steps:

s6: calculating the ratio of the number of stations corresponding to the same-grade tobacco laid in the adjacent stations corresponding to each station to the total number of the adjacent stations, summing the ratio corresponding to each station, and comparing the sum with the total number of the actual leaf laying stations to obtain a second ratio mean value;

s7: and if the second ratio mean value is larger than a second threshold value, re-performing leaf paving and sorting until the second ratio mean value is smaller than the second threshold value, wherein the second threshold value is smaller than the first threshold value.

The method further comprises the following steps:

s8: listing all leaf paving modes through a computer setting program, and calculating the first ratio mean value or the second ratio mean value corresponding to each leaf paving mode;

s9: and comparing the first ratio mean value or the second ratio mean value corresponding to the leaf paving mode, and selecting the leaf paving mode corresponding to the largest first ratio mean value or the smallest second ratio mean value for leaf paving and material distribution.

The method further comprises the following steps:

s10: selecting an optimal leaf paving mode to pave leaves, and calculating the sample loading amount of each grade of tobacco leaves in one leaf paving period according to the flow, the feeding period and the proportion of each grade of tobacco leaves;

s11: and adjusting the sample loading amount of each leaf spreading station according to the principle that the total weight of each belt is consistent.

And further, when the adjacent stations are calculated, the head station and the tail station in the leaf paving procedure are taken as the mutually adjacent stations.

Furthermore, when the number of the stations is calculated and decimal occurs, integers are reserved according to a rounding principle; if the number of the stations obtained by rounding is consistent with the number of the actual stations, the stations are directly used, and if the number of the stations is not consistent, the number of the stations with the largest proportion in the formula components is adjusted, so that the sum of the number of the stations occupied by each grade is equal to the number of the actual stations.

In one embodiment, a certain matching module cigarette processed by a certain redrying plant is selected as an experimental object, and the specific formula composition is shown in table 1:

TABLE 1 formulation ratio of a certain formulation of modular cigarettes

Current situation of test redrying plant:

the feeding link of the test redrying plant is provided with four parallel leaf paving belts, each belt is provided with 9 leaf paving stations, and the total number of the leaf paving stations is 36. Step 1: and determining the number of the leaf paving stations occupied by each grade of tobacco leaves according to the tobacco leaf raw materials in the formula module, the number of the leaf paving stations in a redrying plant and the like.

In order to ensure the completeness of the formula, the number of leaf paving stations occupied by each grade can be obtained by multiplying the proportion K of the grade in the formula by the total number of the leaf paving stations. The calculation results are shown in table 2:

TABLE 2 formulation proportion and number of stations of a certain formulation module cigarette

And adjusting the number of the stations occupying the maximum grade in the formula module to ensure that the sum of the number of the stations occupied by each grade is equal to the number of the actual stations. The number of stations occupied by C in the formula components is adjusted to be 13.

The number of stations occupied by the adjusted formula components is shown in table 3:

TABLE 3 proportion of the formulation of a certain dispensing module cigarette and the number of stations after adjustment

Step 2: all the formulation components on the leaf belts were enumerated by a computer program:

and step 3: method for evaluating leaf spreading uniformity:

and evaluating the leaf paving uniformity according to the proportion of different grades of adjacent leaf paving stations, wherein the evaluation process is based on the premise that the tobacco leaves in each grade have no difference, and the difference of the leaf paving weight of each grade on the stations is not considered. Some of the above ordering results are shown in Table 4:

TABLE 4 sequencing results of a certain matched modular cigarette on a leaf-laying belt

The leaf paving belts are A, B, C, D four in sequence from top to bottom, and the leaf paving stations from left to right are station 1, station 2 …, station 8 and station 9.

As shown in the above method, the station 1 and the station 9 are connected into a circle to consider the adjacent difference, because the tobacco leaf spreading and feeding of the sequence are continuously carried out on each leaf spreading belt to ensure the processing continuity. The adjacent leaf belts are considered because the material on the final four leaf belts is collected on the collection belt.

If the adjacent different ratios of the station 1 of the leaf laying line A are calculated: the denominator is the number of the adjacent leaf laying stations 5, the numerator is the number of the stations corresponding to the adjacent and different grades of tobacco leaves 4, and the ratio is calculated to be 0.8.

The same ratio values adjacent to the 36 stations are calculated by using a computer program, summed and averaged.

Step 4- α was calculated using a computer program for all cases of formulation components on the leaf-laying belt.

And 5, comparing α values, and finding a group of solutions with the maximum α value, namely the situation that the uniformity of the leaf on the leaf-laying belt is the best under the condition.

Of course, the ratio can also be calculated by adopting the number of stations corresponding to the same-grade tobacco leaves on the adjacent stations, and the optimal leaf paving mode with the minimum mean value of the ratio is selected at the moment.

Therefore, the invention provides a method and a system for controlling the uniformity of spread leaf distribution, which solve the problem that the quality level is inconsistent when the existing tobacco is spread according to the formula, the uniformity of tobacco spread leaf can be improved, and the stability of the quality of the finished product sheet tobacco can be ensured.

Correspondingly, the invention also provides a control system for the uniformity of the leaf-laying cloth, which comprises: and the leaf spreading proportion obtaining unit is used for obtaining the tobacco leaf raw material formula proportion in the formula threshing, and determining the leaf spreading proportion of each grade of tobacco leaves according to the tobacco leaf raw material formula proportion. And the station number acquiring unit is used for acquiring the total station number of the spread leaves in the leaf spreading procedure and determining the number of the leaf spreading stations occupied by each grade of tobacco leaves according to the total station number of the spread leaves and the leaf spreading proportion. And the leaf paving unit is used for paving the tobacco leaves according to the proportion of the tobacco leaf raw material formula and the number of the leaf paving stations occupied by each grade of tobacco leaves. The first calculating unit is used for calculating the ratio of the number of the stations corresponding to the tobacco leaves of different grades laid in the adjacent stations corresponding to each station to the total number of the adjacent stations, and summing the ratios corresponding to each station to obtain a first ratio sum. And the control unit is used for re-performing the leaf-spreading sequencing and calculating the first ratio mean value when the first ratio mean value is smaller than a first threshold value.

Further, the system further comprises: and the second calculating unit is used for calculating the ratio of the number of the stations corresponding to the same-grade tobacco laid in the adjacent stations corresponding to each station to the total number of the adjacent stations, summing the ratio corresponding to each station, and obtaining a second ratio mean value by comparing the sum value with the total number of the actual leaf laying stations. The control unit is further configured to perform leaf-spreading sorting again when the second ratio mean is greater than a second threshold value, until the second ratio mean is less than the second threshold value, where the second threshold value is less than the first threshold value.

The system further comprises: and the leaf-spreading listing unit is used for listing all leaf-spreading modes through a computer setting program and calculating the first ratio mean value or the second ratio mean value corresponding to each leaf-spreading mode. And the leaf paving mode determining unit is used for comparing the first ratio mean value or the second ratio mean value corresponding to the leaf paving mode in size, and selecting the leaf paving mode corresponding to the largest first ratio mean value or the smallest second ratio mean value for leaf paving and material distribution.

The system further comprises: and the sample loading amount calculation unit is used for selecting the optimal leaf paving mode to pave the leaves and calculating the sample loading amount of each grade of tobacco leaves in one leaf paving period according to the flow, the feeding period and the proportion of each grade of tobacco leaves. And the sample loading amount calculation unit is also used for adjusting the sample loading amount of each leaf paving station according to the principle that the total weight of each belt is consistent.

The invention provides a method and a system for controlling the uniformity of spreading and distributing materials, which solve the problem that the quality level is inconsistent when the existing tobacco is spread according to the formula, the uniformity of spreading tobacco leaves can be improved, and the stability of the quality of finished tobacco sheets can be ensured.

The construction, features and functions of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the present invention is not limited to the embodiments shown in the drawings, and all equivalent embodiments modified or modified by the spirit and scope of the present invention should be protected without departing from the spirit of the present invention.