Method for automatically correcting real-time blending precision of blended materials in tobacco proportion blending link

Abstract

The method for automatically correcting the real-time blending precision of the blended materials in the tobacco proportion blending link is used for the tobacco proportion blending link, a blending electronic scale and a cut tobacco scale are installed in the tobacco proportion blending link, and the method comprises the following steps: at a certain moment when tobacco is blended according to a proportion, the cut tobacco scale is installed in the tobacco proportion blending link; the method comprises the following steps: respectively calculating the instantaneous blending precision and the accumulated blending precision of a blending electronic scale and a cut tobacco scale; judging whether the instantaneous blending precision dex and the accumulated blending precision beta exceed a standard range or not; and carrying out automatic deviation correction on the instantaneous blending precision dex and the accumulated blending precision beta. According to the invention, a three-step rule of calculation, judgment and deviation correction is adopted; in the production process, the instantaneous blending precision and the accumulative blending precision are dynamically and automatically rectified, so that the defects of high operation difficulty, high material flow fluctuation, poor blending uniformity, poor rectification effect and the like in a manual rectification mode are overcome, the instantaneous blending precision and the accumulative blending precision of blended materials are effectively controlled, and the production efficiency is improved. Blending materials are evenly blended in the production process, and the consistency of cigarette formula tobacco shreds is guaranteed.

Description

Technical Field

[0001] The invention relates to a method for correcting the blending accuracy of blended materials, and in particular to a method for automatically correcting the real-time blending accuracy of blended materials in a tobacco proportion blending process. Background Art

[0002] In the process of making tobacco shreds, the tobacco blending process is the key process of the shredding process. It is generally composed of multiple electronic belt scales, which are used to mix and proportion various tobacco blends. Tobacco blending refers to the real-time and uniform mixing of the materials to be blended with the shreds according to the set ratio based on the flow rate of the shredded leaves. The blending accuracy of the blended materials has a very important impact on the intrinsic quality of the cigarette.

[0003] At present, the tobacco industry generally uses blending accuracy to characterize the mixing uniformity of materials. That is, after the whole batch of production is completed, the actual blending ratio of the whole batch is calculated first (the cumulative amount of blended materials divided by the cumulative amount of leaf shreds), and then the absolute value of the difference between the actual blending ratio of the whole batch and the set ratio in the standard is divided by the set ratio. The smaller the value of the blending accuracy, the better the mixing uniformity. However, this representation is essentially a result control, which characterizes the results of the whole batch and cannot reflect whether the processing process or the mixing of materials within the batch is uniform and consistent.

[0004] During the production process, the flow rate of the blade scale is transmitted to the blending scale as a signal value. The blending scale adjusts the flow rate of the blended material according to the signal value to achieve proportional blending. However, due to external objective reasons such as the fluctuation of the blade flow rate itself, material agglomeration (blocks or cakes), signal transmission and control lags, and sudden production interruptions, the situation exists where the blending accuracy of the entire batch meets the standard, but the instantaneous blending accuracy during the production process does not meet the standard range. At present, when encountering abnormal blending accuracy in the actual production process, manual correction is usually used. This correction method is heavily dependent on the operator's control techniques, which not only increases the operator's workload and control difficulty, but also the blending material flow rate fluctuates greatly during the correction process, the mixing uniformity is poor, and the correction effect is not good.

[0005] Manual deviation correction is a method that relies heavily on the operator's control techniques, which not only increases the operator's workload and difficulty of control, but also causes large fluctuations in the flow of blended materials during the correction process, poor mixing uniformity, and poor correction effect. Summary of the invention

[0006] The invention purpose of this application is to eliminate the problems of difficult control, large fluctuations in material flow, poor mixing uniformity, and poor correction effect in manual correction of blending accuracy, and to provide an automatic correction method for real-time blending accuracy of blended materials in the tobacco proportion blending link.

[0007] In order to achieve the invention purpose of this application, this application adopts the following technical solutions:

[0008] The present invention discloses a method for automatically correcting the real-time blending accuracy of blended materials in a tobacco blending process. The method is used in a tobacco blending process. In the tobacco blending process, a blending electronic scale and a leaf scale are provided. The method comprises the following steps:

[0009] (I) At a certain moment when tobacco is blended in proportion, calculate the instantaneous blending accuracy and cumulative blending accuracy of the blending electronic scale and the leaf scale respectively:

[0010] At the T1 time node after the tobacco blending starts, the instantaneous flow value a measured by the blending electronic scale and the instantaneous flow value b measured by the leaf scale are collected simultaneously; at the T2 time node, the cumulative weight x of the material measured by the blending electronic scale and the cumulative weight y of the material measured by the leaf scale are collected simultaneously; the instantaneous blending accuracy $ is calculated according to formula (1);

[0011]

[0012] In formula (1): $ is the instantaneous blending accuracy; a is the instantaneous flow value of the blending material measured by the blending electronic scale; b is the instantaneous flow value of the blade measured by the blade scale; r is the standard blending ratio, which is known;

[0013] The cumulative blending accuracy β is calculated according to formula (2):

[0014]

[0015] In formula (2): β is the cumulative blending accuracy; x is the cumulative weight of the blended material measured by the blending electronic scale; y is the cumulative weight of the leaf shreds measured by the leaf shreds scale; r is the standard blending ratio, which is known;

[0016] (II) Determine whether the instantaneous blending accuracy $ and the cumulative blending accuracy β exceed the standard range:

[0017] According to the judgment formula (3) and the judgment formula (4), it is judged whether the instantaneous blending accuracy $ and the cumulative blending accuracy β exceed the standard range:

[0018]

[0019] When the instantaneous blending accuracy $ calculated by step (I) satisfies the judgment formula (3), it means that the instantaneous blending accuracy exceeds the standard range, and according to step (III) (I), it is divided into two situations: exceeding the lower limit and exceeding the upper limit, which triggers automatic correction;

[0020] When the cumulative blending accuracy β calculated by step (I) satisfies the judgment formula (4), it means that the cumulative blending accuracy exceeds the standard range, and according to (II) of step (III), it is divided into two situations, exceeding the lower limit and exceeding the upper limit, which triggers automatic correction;

[0021] (III) Automatically correct the instantaneous blending accuracy $ and the cumulative blending accuracy β:

[0022] (I) When the instantaneous blending accuracy $ satisfies the judgment formula (3) and the cumulative blending accuracy β does not satisfy the judgment formula (4), that is, the instantaneous blending accuracy exceeds the standard range, while the cumulative blending accuracy β meets the standard, only the instantaneous blending accuracy $ needs to be corrected:

[0023] (a) When the instantaneous blending accuracy exceeds the lower limit of the standard range, adjust the instantaneous flow value a to correct.

[0024] acorrection = (b*r+Akg / sec) --- Formula (5)

[0025] In formula (5), b is the instantaneous flow value of the blade at the time of correction; r is the standard blending ratio;

[0026] That is, on the basis of the instantaneous blending flow rate, Akg / s is added for correction, A=0.02*a, a is the instantaneous flow value of the blending material weighed by the blending electronic scale at the last moment of correction, and the instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale and the instantaneous flow value and the cumulative weight of the material weighed by the leaf wire scale are collected once per second. According to formula (1) and formula (2), the instantaneous blending at the moment of correction is calculated. When the blending accuracy $ and the cumulative blending accuracy β still meet the condition of (I) (1), repeat the above step (I) (a) until the instantaneous blending accuracy $ is within the standard range, and then restore the instantaneous blending flow value a to b*r; otherwise, check whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions of (I) (b), (II) (c), (II) (d) or (III), and perform corresponding operations according to the conditions they meet;

[0027] (b) When the instantaneous blending accuracy exceeds the upper limit of the standard range, adjust the instantaneous flow value a to correct the

[0028] acorrection = (b*r-Akg / sec) --- Formula (6)

[0029] In formula (6), b is the instantaneous flow value of the blade at the time of correction; r is the standard blending ratio;

[0030] That is, on the basis of the instantaneous blending flow rate, Akg / second is further subtracted for correction, A=0.02*a, a is the instantaneous flow value of the blending material weighed by the blending electronic scale at the last moment of correction, and the instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale and the instantaneous flow value and the cumulative weight of the material weighed by the leaf wire scale are collected once per second. According to formula (1) and formula (2), the instantaneous blending at the moment of correction is calculated. When the blending accuracy $ and the cumulative blending accuracy β still meet the condition of (I) (b), repeat the above step (I) (b) until the instantaneous blending accuracy $ is within the standard range, and then restore the instantaneous blending flow value a to b*r; otherwise, check whether the blending accuracy $ and the cumulative blending accuracy β meet the condition of (I) (a), (II) (c), (II) (d) or (III), and perform corresponding operations according to the conditions they meet;

[0031] (II) When the instantaneous blending accuracy $ does not satisfy the judgment formula (3) and the cumulative blending accuracy β satisfies the judgment formula (4), that is, the instantaneous blending accuracy $ meets the standard range, while the cumulative blending accuracy β exceeds the standard range, only the cumulative blending accuracy β needs to be corrected:

[0032] (c) When the cumulative blending accuracy β exceeds the lower limit of the standard range, the blending ratio r of the blended material is corrected:

[0034] rcorrection = (r + B%) --- Formula (7)

[0035] acorrection = rcorrection * b --- Formula (8)

[0036] In formula (7) and formula (8): r is the standard blending ratio, b is the instantaneous flow value of the blade at the time of correction;

[0037] That is, the standard blending ratio is increased by B percentage points for correction, B is selected between 1% and 2%, and the instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale and the instantaneous flow value and the cumulative weight of the material weighed by the leaf wire scale are collected at a frequency of once per second. According to formula (1) and formula (2), the instantaneous blending accuracy $ and the cumulative blending accuracy β at the correction moment are calculated. When the blending accuracy $ and the cumulative blending accuracy β still meet the condition (c) of (II), repeat the above step (c) of (II) until the cumulative blending accuracy β is within the standard range, and then restore the blending ratio to r; otherwise, check whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions of (a) of (I), (b) of (I), (d) of (II) or (III), and perform corresponding operations according to the conditions they meet;

[0038] (d) When the cumulative blending accuracy β exceeds the upper limit of the standard range, the blending ratio r of the blended material is corrected:

[0039] rcorrection = (r- B%) --- Formula (9)

[0040] acorrection = rcorrection * b ---Formula (10)

[0041] In formula (9) and formula (10): r is the standard blending ratio, b is the instantaneous flow value of the blade at the time of correction;

[0042] That is, the standard blending ratio is reduced by B percentage points for correction, B is selected between 1% and 2%, and the instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale and the instantaneous flow value and the cumulative weight of the material weighed by the leaf wire scale are collected once per second. According to formula (1) and formula (2), the instantaneous blending accuracy $ and the cumulative blending accuracy β at the correction moment are calculated. When the blending accuracy $ and the cumulative blending accuracy β still meet the condition (d) of (II), repeat the above step (II) (d) until the cumulative blending accuracy β is within the standard range, and then restore the blending ratio to r; otherwise, check whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions (a) of (I), (b) of (I), (c) of (II) or (III), and perform corresponding operations according to the conditions they meet;

[0043] (III) When the instantaneous blending accuracy $ satisfies formula (3) and the cumulative blending accuracy β satisfies formula (4), that is, when the instantaneous blending accuracy $ and the cumulative blending accuracy β both exceed the standard range, first perform step (II) to correct the cumulative blending accuracy β; then detect whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions of (I), (II) or (III), and perform corresponding operations according to the conditions they meet.

[0044] The invention discloses a method for automatically correcting the real-time blending accuracy of blended materials in a tobacco proportion blending process, wherein the blended materials are one or more of tobacco stems, stem shreds, thin tobacco sheets, and thin tobacco sheet shreds.

[0045] The method for automatically correcting the real-time blending accuracy of blended materials in the tobacco proportion blending process of the present invention, wherein: the T1 and T2 are the same time point or different time points.

[0046] The method for automatically correcting the real-time blending accuracy of blended materials in the tobacco blending ratio process of the present invention has the following advantages:

[0047] (1) The present invention adopts the three-step rule of "calculation-determination-correction". Different correction methods are used to automatically correct the instantaneous blending accuracy and the cumulative blending accuracy in the actual production process. At the same time, different correction methods are used for the two situations where the blending accuracy exceeds the upper limit and lower limit of the standard. Real-time dynamic automatic correction of the instantaneous blending accuracy and the cumulative blending accuracy in the production process is achieved, effectively improving the instantaneous blending accuracy and the cumulative blending accuracy of the blended materials, so that the blended materials are evenly mixed in the production process, ensuring the consistency of the cigarette formula tobacco, and providing a scientific basis for improving the homogenization control of product quality.

[0048] (2) The instantaneous precision automatic deviation correction control method of the blended materials of the present invention, on the one hand, eliminates the disadvantages of the manual deviation correction method, such as the difficulty of operation, large fluctuation of material flow, poor mixing uniformity and poor deviation correction effect. While reducing the work pressure of operators and improving work efficiency, it overcomes the influence of the original equipment layout and the shortcomings of the equipment itself on the instantaneous blending precision, and makes up for the shortcomings of uneven blending of blended materials and unstable product quality in the production process. On the other hand, this method can be applied and promoted to the deviation correction control of the instantaneous precision of adding materials and adding fragrances in the silk processing process, and provides a reference basis for the quality homogenization of the silk processing process.

[0049] (3) The method of the present invention is simple, effective, and has strong practicality and good practical significance and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a three-dimensional schematic diagram of a device used in the method for automatically correcting the real-time blending accuracy of blended materials in the tobacco proportion blending process of the present invention.

[0051] exist Figure 1 Among them, label 1 is the blending electronic scale; label 2 is the leaf silk scale; label 3 is the blending discharge conveyor belt; label 4 is the leaf silk feeding conveyor belt; label 5 is the mixing conveyor belt; label 6 is the mixing cabinet; label 7 is the discharge conveyor belt; label 8 is the blending feeding conveyor belt; label 9 is the leaf silk discharge conveyor belt. DETAILED DESCRIPTION

[0052] like Figure 1As shown, the device used in the method for automatic correction of real-time blending accuracy of blended materials in the tobacco proportion blending link of the present invention includes: a blending electronic scale 1, a leaf shred scale 2, a blending discharge conveyor belt 3, a leaf shred feed conveyor belt 4, a mixing conveyor belt 5, and a mixing cabinet 6; a cabinet conveyor belt 7, a blending feed conveyor belt 8, and a leaf shred discharge conveyor belt 9. The blended materials enter the blending discharge conveyor belt 3, the mixing conveyor belt 5, and the mixing cabinet 6 in sequence through the blending feed conveyor belt 8 and the blending electronic scale 1. The leaf shreds enter the leaf shred discharge conveyor belt 9, the mixing conveyor belt 5, and the mixing cabinet 6 in sequence through the leaf shred feed conveyor belt 4 and the leaf shred scale 2. After the leaf shreds and the blended materials are evenly mixed in the mixing cabinet 6, they are sent out through the cabinet conveyor belt 7.

[0053] The method for automatically correcting the real-time blending accuracy of blended materials in the tobacco blending ratio link of the present invention is used in the tobacco blending ratio link. In the tobacco blending ratio link, a blending electronic scale 1 and a leaf scale 2 are installed. The method comprises the following steps:

[0054] (I) At a certain moment when tobacco is blended in proportion, calculate the instantaneous blending accuracy and cumulative blending accuracy of the blending electronic scale 1 and the leaf scale 2 respectively:

[0055] At the time node T1 after the tobacco blending starts, the instantaneous flow value a measured by the blending electronic scale 1 and the instantaneous flow value b measured by the leaf scale 2 are collected simultaneously; at the time node T2, the cumulative weight x of the material measured by the blending electronic scale 1 and the cumulative weight y of the material measured by the leaf scale 2 are collected simultaneously; the instantaneous blending accuracy $ is calculated according to formula (1);

[0056]

[0057] In formula (1): $ is the instantaneous blending accuracy; a is the instantaneous flow value of the blending material measured by the blending electronic scale 1; b is the instantaneous flow value of the blade measured by the blade scale 2; r is the standard blending ratio, which is known;

[0058] The cumulative blending accuracy β is calculated according to formula (2):

[0059]

[0060] In formula (2): β is the cumulative blending accuracy; x is the cumulative weight of the blended material weighed by the blending electronic scale 1; y is the cumulative weight of the leaf shreds weighed by the leaf shreds scale 2; r is the standard blending ratio, which is known;

[0061] (II) Determine whether the instantaneous blending accuracy $ and the cumulative blending accuracy β exceed the standard range:

[0062] According to the judgment formula (3) and the judgment formula (4), it is judged whether the instantaneous blending accuracy $ and the cumulative blending accuracy β exceed the standard range:

[0063]

[0064] When the instantaneous blending accuracy $ calculated by step (I) satisfies the judgment formula (3), it means that the instantaneous blending accuracy exceeds the standard range. According to (I) of step (III), it is divided into two situations: exceeding the lower limit and exceeding the upper limit, which triggers automatic correction;

[0065] When the cumulative blending accuracy β calculated by step (I) satisfies the judgment formula (4), it means that the cumulative blending accuracy exceeds the standard range, and according to (II) of step (III), it is divided into two situations, exceeding the lower limit and exceeding the upper limit, which triggers automatic correction;

[0066] (III) Automatically correct the instantaneous blending accuracy $ and the cumulative blending accuracy β:

[0067] (I) When the instantaneous blending accuracy $ satisfies the judgment formula (3) and the cumulative blending accuracy β does not satisfy the judgment formula (4), that is, the instantaneous blending accuracy exceeds the standard range, while the cumulative blending accuracy β meets the standard, only the instantaneous blending accuracy $ needs to be corrected:

[0068] (a) When the instantaneous blending accuracy exceeds the lower limit of the standard range, adjust the instantaneous flow value a to correct.

[0069] acorrection = (b*r+Akg / sec) --- Formula (5)

[0070] In formula (5), b is the instantaneous flow value of the blade at the time of correction; r is the standard blending ratio;

[0071] That is, on the basis of the instantaneous blending flow rate, Akg / s is added for correction, A=0.02*a, a is the instantaneous flow value of the blending material weighed by the blending electronic scale 1 at the last moment of correction, and the instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale 1 and the instantaneous flow value and the cumulative weight of the material weighed by the blade scale 2 are collected once per second. According to formula (1) and formula (2), the instantaneous flow at the moment of correction is calculated. blending accuracy $ and cumulative blending accuracy β; when the blending accuracy $ and cumulative blending accuracy β still meet the condition of (I) (1), repeat the above step (I) (a) until the instantaneous blending accuracy $ is within the standard range, and then restore the instantaneous blending flow value a to b*r; otherwise, check whether the blending accuracy $ and cumulative blending accuracy β meet the conditions of (I) (b), (II) (c), (II) (d) or (III), and perform corresponding operations according to the conditions they meet;

[0072] (b) When the instantaneous blending accuracy exceeds the upper limit of the standard range, adjust the instantaneous flow value a to correct the

[0073] acorrection = (b*r-Akg / sec) --- Formula (6)

[0074] In formula (6), b is the instantaneous flow value of the blade at the time of correction; r is the standard blending ratio;

[0075] That is, on the basis of the instantaneous blending flow rate, Akg / second is further subtracted for correction, A=0.02*a, a is the instantaneous flow value of the blending material weighed by the blending electronic scale 1 at the last moment of correction, and the instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale 1 and the instantaneous flow value and the cumulative weight of the material weighed by the blade scale 2 are collected once per second. According to formula (1) and formula (2), the instantaneous flow value at the moment of correction is calculated. blending accuracy $ and cumulative blending accuracy β; when the blending accuracy $ and cumulative blending accuracy β still meet the condition of (I) (b), repeat the above step (I) (b) until the instantaneous blending accuracy $ is within the standard range, and then restore the instantaneous blending flow value a to b*r; otherwise, check whether the blending accuracy $ and cumulative blending accuracy β meet the condition of (I) (a), (II) (c), (II) (d) or (III), and perform corresponding operations according to the conditions they meet;

[0076] (II) When the instantaneous blending accuracy $ does not satisfy the judgment formula (3) and the cumulative blending accuracy β satisfies the judgment formula (4), that is, the instantaneous blending accuracy $ meets the standard range, while the cumulative blending accuracy β exceeds the standard range, only the cumulative blending accuracy β needs to be corrected:

[0077] (c) When the cumulative blending accuracy β exceeds the lower limit of the standard range, the blending ratio r of the blended material is corrected:

[0079] rcorrection = (r + B%) --- Formula (7)

[0080] acorrection = rcorrection * b ---Formula (8)

[0081] In formula (7) and formula (8): r is the standard blending ratio, b is the instantaneous flow value of the blade at the time of correction;

[0082] That is, the standard blending ratio is increased by B percentage points for correction, B is selected between 1% and 2%, and the instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale 1 and the instantaneous flow value and the cumulative weight of the material weighed by the blade scale 2 are collected at a frequency of once per second. According to formula (1) and formula (2), the instantaneous blending accuracy $ and the cumulative blending accuracy β at the correction moment are calculated. When the blending accuracy $ and the cumulative blending accuracy β still meet the condition (c) of (II), repeat the above step (II) (c) until the cumulative blending accuracy β is within the standard range, and then restore the blending ratio to r; otherwise, check whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions of (a) of (I), (b) of (I), (d) of (II) or (III), and perform corresponding operations according to the conditions they meet;

[0083] (d) When the cumulative blending accuracy β exceeds the upper limit of the standard range, the blending ratio r of the blended material is corrected:

[0084] rcorrection = (r- B%) --- Formula (9)

[0085] acorrection = rcorrection * b ---Formula (10)

[0086] In formula (9) and formula (10): r is the standard blending ratio, b is the instantaneous flow value of the blade at the time of correction;

[0087] That is, the standard blending ratio is reduced by B percentage points for correction, B is selected between 1% and 2%, and the instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale 1 and the instantaneous flow value and the cumulative weight of the material weighed by the leaf wire scale 2 are collected at a frequency of once per second. According to formula (1) and formula (2), the instantaneous blending accuracy $ and the cumulative blending accuracy β at the correction moment are calculated. When the blending accuracy $ and the cumulative blending accuracy β still meet the condition (d) of (II), repeat the above step (II) (d) until the cumulative blending accuracy β is within the standard range, and then restore the blending ratio to r; otherwise, check whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions of (a) of (I), (b) of (I), (c) of (II) or (III), and perform corresponding operations according to the conditions they meet;

[0088] (III) When the instantaneous blending accuracy $ satisfies formula (3) and the cumulative blending accuracy β satisfies formula (4), that is, when the instantaneous blending accuracy $ and the cumulative blending accuracy β both exceed the standard range, first perform step (II) to correct the cumulative blending accuracy β; then detect whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions of (I), (II) or (III), and perform corresponding operations according to the conditions they meet.

[0089] The blending material is one or more of tobacco stems, stem shreds, thin tobacco sheets, and thin tobacco shreds. T1 and T2 are the same time point or different time points.

[0090] The following is a comparison of the improvement in instantaneous blending accuracy of blended materials in the production process before and after the application of this method for the same brand and specification.

[0091] Taking a certain third-class cigarette brand as an example, the brand technical standard stipulates that the blending ratio of stem shreds is 10.2%. Since stem shreds are obviously different from leaf shreds in appearance, stem shreds are selected as the research object. A is selected as the batch before the present invention is applied, and B is the batch after 15 minutes of production. The instantaneous blending accuracy and cumulative blending accuracy of stem shreds in the production process of 3 batches of each group A and B are tested.

[0092] During the production of each batch of Group A and Group B, sampling was performed at the material drop outlet 5m after the point where the stem and leaf shreds met in the blending process. The first sampling was performed 10min after the leaf shred scale 2 began to have flow. The material dropped from the material drop outlet was collected with a sampling bag to avoid the sampling error caused by manual grabbing. 100g was collected each time, and sampling was performed every 10min, for a total of 5 times. After the batch production was completed, the cumulative amount of leaf shreds and stem shreds was recorded.

[0093] Manual picking was used to select and weigh the shredded stems from 5 samples in each batch of Group A and Group B, and the actual blending ratio and instantaneous blending accuracy of the shredded stems in each sample were calculated.

[0094] Table 1 shows the statistical results of instantaneous blending accuracy of each batch of shredded stems in Groups A and B:

[0095]

[0096] Table 1

[0097] As can be seen from Table 1, the instantaneous blending accuracy and average instantaneous accuracy of most samples in each batch of Group A are much higher than the standard requirements (instantaneous blending accuracy ≤ ± 1%), and the instantaneous blending accuracy and average instantaneous accuracy of all samples in each batch of Group B meet the standard requirements (instantaneous blending accuracy ≤ ± 1%), and the accuracy is relatively high, indicating that the instantaneous blending accuracy of shredded stems can be effectively improved by correcting the instantaneous blending accuracy using the method of the present invention, thereby ensuring the mixing uniformity of shredded stems during the production process.

[0098] Table 2 shows the cumulative blending accuracy statistics of each batch of Group A and Group B.

[0099]

[0100] Table 2

[0101] As can be seen from Table 2, although the cumulative blending accuracy of each batch of Group A meets the standard requirements (cumulative blending accuracy ≤ ± 0.5%), the blending accuracy of Group A is low and close to the standard critical value, while the cumulative blending accuracy of each batch of Group B is far lower than the standard requirement ((cumulative blending accuracy ≤ ± 0.5%), and the cumulative blending accuracy is at a relatively high level, indicating that the use of the method of the present invention to correct the cumulative blending accuracy can effectively improve the mixing uniformity of the stems in the batch;

[0102] Therefore, the present invention performs dynamic automatic deviation correction control on the instantaneous blending accuracy of the blended materials in the silk production process, adopts the three-step rule of "calculation-determination-correction", and performs dynamic automatic deviation correction on the instantaneous blending accuracy and the cumulative blending accuracy in the production process. It not only eliminates the disadvantages of the manual deviation correction method such as high operating difficulty, large fluctuation of material flow, poor mixing uniformity, and poor deviation correction effect, but also can effectively control the instantaneous blending accuracy and the cumulative blending accuracy of the blended materials, so that the blended materials are evenly mixed in the production process, thus ensuring the consistency of cigarette formula tobacco, providing a scientific basis for improving product quality homogenization control, and having good application value.

[0103] The above is only one embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for automatically correcting the real-time blending accuracy of blended materials in a tobacco blending process, the method being used in a tobacco blending process, wherein a blending electronic scale (1) and a leaf scale (2) are provided in the tobacco blending process, and the method is characterized in that: The method comprises the following steps: (i) At a certain moment when tobacco is blended in proportion, the instantaneous blending accuracy and the cumulative blending accuracy of the blending electronic scale (1) and the leaf scale (2) are calculated respectively: At the time node T1 after the tobacco blending starts in proportion, the instantaneous flow value a measured by the blending electronic scale (1) and the instantaneous flow value b measured by the leaf scale (2) are collected simultaneously; at the time node T2, the cumulative weight x of the material measured by the blending electronic scale (1) and the cumulative weight y of the material measured by the leaf scale (2) are collected simultaneously; the instantaneous blending accuracy $ is calculated according to formula (1); In formula (1): $ is the instantaneous blending accuracy; a is the instantaneous flow value of the blending material measured by the blending electronic scale (1); b is the instantaneous flow value of the blade measured by the blade scale (2); r is the standard blending ratio, which is known; The cumulative blending accuracy β is calculated according to formula (2): In formula (2): β is the cumulative blending accuracy; x is the cumulative weight of the blended material weighed by the blending electronic scale (1); y is the cumulative weight of the leaf shreds weighed by the leaf shreds scale (2); r is the standard blending ratio, which is known; (II) Determine whether the instantaneous blending accuracy $ and the cumulative blending accuracy β exceed the standard range: According to the judgment formula (3) and the judgment formula (4), it is judged whether the instantaneous blending accuracy $ and the cumulative blending accuracy β exceed the standard range: When the instantaneous blending accuracy $ calculated by step (I) satisfies the judgment formula (3), it means that the instantaneous blending accuracy exceeds the standard range, and according to step (III) (I), it is divided into two situations: exceeding the lower limit and exceeding the upper limit, which triggers automatic correction; When the cumulative blending accuracy β calculated by step (I) satisfies the judgment formula (4), it means that the cumulative blending accuracy exceeds the standard range, and according to (II) of step (III), it is divided into two situations, exceeding the lower limit and exceeding the upper limit, which triggers automatic correction; (III) Automatically correct the instantaneous blending accuracy $ and the cumulative blending accuracy β: (I) When the instantaneous blending accuracy $ satisfies the judgment formula (3) and the cumulative blending accuracy β does not satisfy the judgment formula (4), that is, the instantaneous blending accuracy exceeds the standard range, while the cumulative blending accuracy β meets the standard, only the instantaneous blending accuracy $ needs to be corrected: (a) When the instantaneous blending accuracy exceeds the lower limit of the standard range, adjust the instantaneous flow value a to correct. acorrection = (b*r+Akg / sec) --- Formula (5) In formula (5), b is the instantaneous flow value of the blade at the time of correction; r is the standard blending ratio; That is, on the basis of the instantaneous blending flow rate, Akg / second is added for correction, A=0.02*a, a is the instantaneous flow value of the blending material weighed by the blending electronic scale (1) at the last moment of correction, and the instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale (1) and the instantaneous flow value and the cumulative weight of the material weighed by the blade scale (2) are collected at a frequency of once per second. According to formula (1) and formula (2), the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale (1) are calculated at the moment of correction. The instantaneous blending accuracy $ and the cumulative blending accuracy β are determined; when the above blending accuracy $ and the cumulative blending accuracy β still meet the condition of (I) (1), repeat the above step (I) (a) until the instantaneous blending accuracy $ is within the standard range, and then restore the instantaneous blending flow value a to b*r; otherwise, check whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions of (I) (b), (II) (c), (II) (d) or (III), and perform corresponding operations according to the conditions they meet; (b) When the instantaneous blending accuracy exceeds the upper limit of the standard range, adjust the instantaneous flow value a to correct the acorrection = (b*r-Akg / sec) --- Formula (6) In formula (6), b is the instantaneous flow value of the blade at the time of correction; r is the standard blending ratio; That is, on the basis of the instantaneous blending flow rate, Akg / second is further subtracted for correction, where A=0.02*a, where a is the instantaneous flow value of the blending material weighed by the blending electronic scale (1) at the last moment of correction. The instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale (1) and the instantaneous flow value and the cumulative weight of the material weighed by the blade scale (2) are collected once per second. According to formula (1) and formula (2), the instantaneous flow value and the cumulative weight of the material weighed by the blade scale (2) are calculated at the moment of correction. The instantaneous blending accuracy $ and the cumulative blending accuracy β are determined; when the above blending accuracy $ and the cumulative blending accuracy β still meet the condition of (I) (b), repeat the above step (I) (b) until the instantaneous blending accuracy $ is within the standard range, and then restore the instantaneous blending flow value a to b*r; otherwise, check whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions of (I) (a), (II) (c), (II) (d) or (III), and perform corresponding operations according to the conditions they meet; (II) When the instantaneous blending accuracy $ does not satisfy the judgment formula (3) and the cumulative blending accuracy β satisfies the judgment formula (4), that is, the instantaneous blending accuracy $ meets the standard range, while the cumulative blending accuracy β exceeds the standard range, only the cumulative blending accuracy β needs to be corrected: (c) When the cumulative blending accuracy β exceeds the lower limit of the standard range, the blending ratio r of the blended material is corrected: rcorrection = (r + B%) --- Formula (7) acorrection = rcorrection * b --- Formula (8) In formula (7) and formula (8): r is the standard blending ratio, b is the instantaneous flow value of the blade at the time of correction; That is, the standard blending ratio is increased by B percentage points for correction, B is selected between 1% and 2%, and the instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale (1) and the instantaneous flow value and the cumulative weight of the material weighed by the blade scale (2) are collected at a frequency of once per second. According to formula (1) and formula (2), the instantaneous blending accuracy $ and the cumulative blending accuracy β at the correction moment are calculated. When the blending accuracy $ and the cumulative blending accuracy β still meet the condition (c) of (II), repeat the above step (c) of (II) until the cumulative blending accuracy β is within the standard range, and then restore the blending ratio to r; otherwise, check whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions of (a) of (I), (b) of (I), (d) of (II) or (III), and perform corresponding operations according to the conditions they meet; (d) When the cumulative blending accuracy β exceeds the upper limit of the standard range, the blending ratio r of the blended material is corrected: rcorrection = (rB%) --- Formula (9) acorrection = rcorrection * b --- Formula (10) In formula (9) and formula (10): r is the standard blending ratio, b is the instantaneous flow value of the blade at the time of correction; That is, the standard blending ratio is reduced by B percentage points for correction, B is selected between 1% and 2%, and the instantaneous flow value is adjusted to a correction. At the same time, during the correction process, the instantaneous flow value and the cumulative weight of the material weighed by the blending electronic scale (1) and the instantaneous flow value and the cumulative weight of the material weighed by the blade scale (2) are collected at a frequency of once per second. According to formula (1) and formula (2), the instantaneous blending accuracy $ and the cumulative blending accuracy β at the correction moment are calculated. When the blending accuracy $ and the cumulative blending accuracy β still meet the condition (d) of (II), repeat the above step (II) (d) until the cumulative blending accuracy β is within the standard range, and then restore the blending ratio to r; otherwise, check whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions (a) of (I), (b) of (I), (c) of (II) or (III), and perform corresponding operations according to the conditions they meet; (III) When the instantaneous blending accuracy $ satisfies formula (3) and the cumulative blending accuracy β satisfies formula (4), that is, when the instantaneous blending accuracy $ and the cumulative blending accuracy β both exceed the standard range, first perform step (II) to correct the cumulative blending accuracy β; then detect whether the blending accuracy $ and the cumulative blending accuracy β meet the conditions of (I), (II) or (III), and perform corresponding operations according to the conditions they meet.

2. The method for automatically correcting the real-time blending accuracy of blended materials in the tobacco blending process according to claim 1, characterized in that: The blending material is one or more of tobacco stems, stem shreds, thin tobacco sheets, and thin tobacco sheet shreds.

3. The method for automatically correcting the real-time blending accuracy of blended materials in the tobacco blending process according to claim 2, characterized in that: The T1 and T2 are the same time point or different time points.

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