CN108303344B - Method for judging falling of cigarette combustion cone - Google Patents

Method for judging falling of cigarette combustion cone Download PDF

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CN108303344B
CN108303344B CN201711379891.6A CN201711379891A CN108303344B CN 108303344 B CN108303344 B CN 108303344B CN 201711379891 A CN201711379891 A CN 201711379891A CN 108303344 B CN108303344 B CN 108303344B
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density
cigarette
falling
judging
combustion cone
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CN108303344A (en
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向虎
何孝强
张云飞
邹玉胜
赵荣
刘戈弋
杨剑锋
李明
杨涛
李绍臣
王龙
蒋晓伟
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Hongyun Honghe Tobacco Group Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/24—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing the transmission of wave or particle radiation through the material

Abstract

The invention discloses a method for judging falling of a cigarette combustion cone, which is based on tobacco shred filling amount and tobacco shred distribution uniformity in cigarettes and utilizes cigarette density measured by a conventional microwave moisture density meter to provide the method for judging falling of the cigarette combustion cone. The invention provides a brand new method for judging the falling of the cigarette combustion cone by utilizing the existing equipment, can quickly and accurately judge the falling phenomenon of the cigarette combustion cone, and has positive effects of improving the cigarette quality and reducing the falling phenomenon of the cigarette combustion cone.

Description

Method for judging falling of cigarette combustion cone
Technical Field
The invention relates to a method for judging falling of a cigarette combustion cone.
Background
The cigarette burning cone falling is a phenomenon that the burning cone of a cigarette falls in the smoking process, is a serious cigarette product quality defect, has adverse effect on the smoking experience of consumers and also has serious potential safety hazard, so that the scientific and accurate judgment on the falling of the cigarette burning cone is very important.
At present, there are two methods for detecting the falling of the cigarette burning cone in the industry, one is manual suction, and the other is detection through a burning cone falling detector. Although manual pumping is easy to implement, the manual pumping is too labor-consuming, and the detection result is influenced by artificial subjective factors and is not objective and precise; although the burning cone falling detection instrument can effectively detect the phenomenon that the burning cone falls, the time consumption is long, most of domestic production plants do not introduce the equipment, and the microwave moisture density instrument can quickly detect the cigarette density and is widely applied.
Disclosure of Invention
The invention aims to provide a method for quickly and accurately judging falling of a cigarette combustion cone.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a method for judging falling of a cigarette combustion cone comprises the following steps:
(1) calculating the optimal theoretical density rho and the minimum theoryTheoretical density ρ1First density range I1, first density range variation coefficient C1, second density range I2, and second density range variation coefficient C2: measuring the cut tobacco filling value f under the reduction of the leveling disc of the cigarette making machine according to the specification of YC/T152-2001, namely the determination of the cut tobacco filling value of the cigarette, and calculating the optimal theoretical density
Figure BDA0001515368060000011
Lowest theoretical density ρ1ρ × 85%, the first decision density interval I1 is [0.94 ρ, ρ), the first decision density interval coefficient of variation is 10.8%, the second decision density interval I2 is [0.85 ρ,0.94 ρ), and the second decision density interval coefficient of variation is 6.7%.
(2) Measuring the cigarette density: the cigarette density is measured according to the specification of YC/T476 plus 2013 microwave method for measuring the cigarette tobacco density, the number of samples is 200, the cigarette density is measured from the ignition end of the cigarette, the cigarette density is measured, the tipping paper causes interference to the value of the cigarette density, the measurement data is stopped until the tipping paper moves forward by 2mm in consideration of the detection error of an instrument, and therefore the measurement range is determined to be 0-l [ the length of the cigarette- (the width of the tipping paper +3) ]]At a spacing of 1mm, each measurement is denoted as xijThe density value of the tobacco at jmm of the ith cigarette is shown, wherein i belongs to [1,200 ]],j∈[0,l]。
(3) Calculating the sample density point is more than or equal to the optimal theoretical density ratio r:
Figure BDA0001515368060000021
wherein
is(xijRho) represents that whether each density point is larger than or equal to the optimal theoretical density or not is judged, if so, the value is 1, and if not, the value is 0;
sum[is(xij≥ρ)]representing the number of the measured data which is larger than the optimal theoretical density;
(l +1) × 200 indicates the number of all measurement points.
(4) Calculate sample mean density change angle α:
Figure BDA0001515368060000022
wherein, the coordinate of the point A is
Figure BDA0001515368060000023
Figure BDA0001515368060000024
Representing the average of the densities at jmm for 200 cigarettes, point a being the maximum of the average densities; coordinates of point B are
Figure BDA0001515368060000025
A first point representing that the absolute value of the difference between two adjacent average density points is less than 1 from 0; the coordinate of point C is
Figure BDA0001515368060000026
The first point of which the absolute value of the difference between two adjacent average density points is greater than 1 is shown from the point B.
(5) Calculating the average density of the middle section (excluding the tight head part) of the ith cigarette
Figure BDA0001515368060000031
Coefficient of variation in density C.Vi：
Figure BDA0001515368060000032
Wherein
Figure BDA0001515368060000033
l1 denotes the ignition end leveling disk groove arc length, of]Representing rounding;
Figure BDA00015153680600000313
Figure BDA00015153680600000314
represents rounding down;
Figure BDA0001515368060000034
Figure BDA0001515368060000035
(6) and evaluating the falling probability of the combustion cones of a group of cigarettes, wherein the larger the proportion r of the sample density point which is greater than or equal to the optimal theoretical density rho is, the smaller the falling probability of the combustion cones is, and if r is similar (the absolute difference is less than 1%), the larger the sample average density change included angle α is, the smaller the falling probability of the combustion cones is.
(7) Judging whether a cigarette can be burnt and the cone falls down: average density of middle section of cigarette
Figure BDA0001515368060000036
Coefficient of variation C.ViWith the optimum theoretical density ρ and the lowest theoretical density ρ1Comparing the first judgment density interval I1, the first judgment density interval variation coefficient C1, the second judgment density interval I2 and the second judgment density interval variation coefficient C2, if the first judgment density interval I1, the first judgment density interval variation coefficient C1, the second judgment density interval variation coefficient C2 and the second judgment density interval variation coefficient are different, respectively
Figure BDA0001515368060000037
Judging that the cigarette does not have the combustion cone falling; if it is not
Figure BDA0001515368060000038
And C.ViIf the combustion cone is less than 10.8%, judging that the cigarette does not drop; if it is not
Figure BDA0001515368060000039
And C.ViMore than or equal to 10.8 percent, judging that the cigarette can generate combustion cone falling; if it is not
Figure BDA00015153680600000310
And C.ViIf the combustion cone is less than 6.7%, judging that the cigarette does not drop; if it is not
Figure BDA00015153680600000311
And C.ViMore than or equal to 6.7 percent, judging that the cigarette can generate combustion cone falling; if it is not
Figure BDA00015153680600000312
The cigarette is judged to have the burning cone falling.
Compared with the prior art, the invention has the beneficial effects that: the cigarette density measured by the existing microwave moisture density meter is used, the cigarette combustion cone falling phenomenon can be quickly and accurately judged by comparing the cigarette density measured by the existing microwave moisture density meter with the detection data of the combustion cone falling detector from the tobacco shred filling amount and the tobacco shred distribution uniformity in the cigarette, and the cigarette density measuring method has positive effects of improving the cigarette quality and reducing the cigarette combustion cone falling phenomenon.
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FIG. 1 is a logic diagram of the method for judging the falling of the cigarette combustion cone of the present invention.
Detailed Description
In the present embodiment, it should be noted that the relational terms such as first and second, and the like are only used for distinguishing one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
In addition, in the present embodiment, if the connection or fixing manner between the components is not specifically described, the connection or fixing manner may be a bolt fixing manner, a pin fixing manner, or a pin shaft connecting manner, which is commonly used in the prior art, and therefore, detailed description thereof is omitted in this embodiment.
Referring to fig. 1, a method for judging the falling of a cigarette combustion cone,
example 1: and (5) comparing and judging the falling conditions of the cigarette burning cones of different brands.
Sample preparation: cloud cigarette brand 1 and cloud cigarette brand 2, cigarette design index is as follows:
TABLE 1 cigarette design index
Brand Cigarette length mm Width mm of tipping paper
Yunyan 1 84 32
Yunyan 2 84 37
The instrument comprises the following steps: model MW4420 microwave moisture densitometer from TEWS, Germany.
The judging steps are as follows:
(1) calculating the optimal theoretical density rho and the lowest theoretical density rho1First density range I1, first density range variation coefficient C1, second density range I2, and second density range variation coefficient C2: the respective measured yarn waste filling values of the two brands were 4.36cm3G and 4.29cm3The corresponding parameter values are:
TABLE 2 filling values of the yarn ends
Item Yunyan 1 Yunyan 2
Fill value cm of cut tobacco3/g 4.36 4.29
Optimum theoretical density mg/cm3 229.4 233.1
(2) Measuring the cigarette density:
the cigarette density is measured according to the specification of YC/T476 plus 2013 microwave method for measuring the cigarette tobacco density, 200 cigarettes with two brands are respectively taken, and the measurement range is defined as 0-l [ the length of the cigarette- (the width of the tipping paper +3) ].
TABLE 3 cigarette density values of Yunyan 1
Figure BDA0001515368060000051
Figure BDA0001515368060000061
TABLE 4 cigarette density values of Yunyan 2
Figure BDA0001515368060000062
(3) Calculating the proportion r of the sample density points to be greater than or equal to the optimal theoretical density:
TABLE 5 sample Density points greater than optimal theoretical Density ratio
Figure BDA0001515368060000063
Because the difference between the two ratios r is less than 1%, the average density change included angle of the two samples needs to be calculated for comparison.
(4) Calculating the mean density variation included angle of the sample
Figure BDA0001515368060000064
Firstly, calculating the sample average density change included angle of the cloud cigarette 1, wherein the coordinate of the point A is (7,255.2), the coordinate of the point B is (21,222.4), the coordinate of the point C is (38,217.9),
Figure BDA0001515368060000071
then calculating the average density change included angle of the cloud 2 sample, wherein the coordinate of the point A is (7,265.6), the coordinate of the point B is (23,223.4), the coordinate of the point C is (45,221.1),
Figure BDA0001515368060000072
because α 1 is more than α 2, the falling probability of the cigarette combustion cone of the Yunyan tobacco 1 is considered to be lower than that of the Yunyan tobacco 2, the cigarette combustion cone falling head tester is used for testing two brands of cigarette samples in the same batch, the test result shows that 8 cigarettes in 200 cigarettes of the Yunyan tobacco 1 have the phenomenon of falling of the combustion cone, and 12 cigarettes in the Yunyan tobacco 2 have the phenomenon of falling of the combustion cone, which is consistent with the judgment conclusion of the invention.
Example 2: and judging the falling proportion of the cigarette combustion cone.
Sample preparation: the cigarette brand 3 is characterized in that the related indexes of the cigarette brand are as follows:
TABLE 6 cigarette indexes
Figure BDA0001515368060000073
The instrument comprises the following steps: model MW4420 microwave moisture densitometer from TEWS, Germany.
The judging steps are as follows:
(1) calculating the optimal theoretical density rho and the lowest theoretical density rho1First density range I1, first density range variation coefficient C1, second density range I2, and second density range variation coefficient C2: the filling value f of the cut tobacco shred under the reduction of the leveling disc of the cigarette making machine is measured to be 4.44cm3G, calculatingOptimum theoretical density
Figure BDA0001515368060000074
Lowest theoretical density ρ1＝ρ*0.85＝191.4mg/cm3The first decision density interval I1 ═ 0.94 ρ, ρ ═ 211.7,225.2), the first decision density interval coefficient of variation was 10.8%, the second decision density interval I2 ═ 0.85 ρ,0.94 ρ ═ 191.4,211.7), and the second decision density interval coefficient of variation was 6.7%.
(2) The cigarette density is measured according to the specification of YC/T476 plus 2013 microwave method for measuring the cigarette tobacco density, the number of samples is 200, the cigarette density is measured from the ignition end of the cigarette, and the measurement range is determined to be 0-l [ the length of the cigarette- (the width of the tipping paper +3)]At a spacing of 1mm, each measurement is denoted as xijThe density value of the tobacco at jmm of the ith cigarette is shown, wherein i belongs to [1,200 ]],j∈[0,l]。
(3) Calculating the average density of the middle section (excluding the tight head part) of the ith cigarette
Figure BDA00015153680600000816
Coefficient of variation in density C.Vi：
Figure BDA0001515368060000081
l1 denotes the pilot end leveling disk groove arc length; since the leveling disk is 6 grooves, and
Figure BDA0001515368060000082
l2 tipping paper width +3 40mm, l3<(l2-1), therefore
Figure BDA00015153680600000815
Thus, it is possible to provide
Figure BDA0001515368060000083
(4) Judging whether a cigarette can be burnt and the cone falls down: average density of middle section of cigarette
Figure BDA0001515368060000084
Coefficient of variation C.ViWith the optimum theoretical density ρ and the lowest theoretical density ρ1Comparing the first judgment density interval I1, the first judgment density interval variation coefficient C1 with the second judgment density interval I2 and the second judgment density interval variation coefficient C2, and finally judging that 4 cigarettes possibly generate the combustion cone falling condition, wherein the first cigarette is numbered 68, and the corresponding cigarette is correspondingly numbered
Figure BDA0001515368060000085
C.V6810.99% because
Figure BDA0001515368060000086
And C.V68Not less than 10.8 percent, so the cigarette is judged to have the combustion cone falling condition; the second branch is numbered 91, corresponding to
Figure BDA0001515368060000087
C.V917.42% because
Figure BDA0001515368060000088
And C.V91More than or equal to 6.7 percent, so that the cigarette is judged to possibly have the combustion cone falling condition; the third branch is numbered 123, corresponding to
Figure BDA0001515368060000089
Because of the fact that
Figure BDA00015153680600000810
Therefore, the cigarette is judged to possibly have the combustion cone falling condition; the fourth branch is numbered 184, corresponding to
Figure BDA00015153680600000811
C.V1847.6% because
Figure BDA00015153680600000812
And C.V184More than or equal to 6.7 percent, so that the cigarette is judged to possibly have the combustion cone falling condition; the third branch is numbered 123, corresponding to
Figure BDA00015153680600000813
Because of the fact that
Figure BDA00015153680600000814
Therefore, the cigarette is judged to possibly have the combustion cone falling condition; the fourth branch is numbered 184, corresponding to
Figure BDA0001515368060000091
C.V1847.6% because
Figure BDA0001515368060000092
And C.V184More than or equal to 6.7 percent, so the cigarette is judged to possibly have the combustion cone falling condition. Finally, the proportion that the cigarette combustion cone of the sample possibly falls is judged to be 2%, the cigarette samples of the same batch of the brand are detected by a cigarette combustion cone falling head tester, the falling proportion of the combustion cone of 5 cigarettes is 2.5%, and the falling proportion is close to the judgment result of the invention, so that the result that the cigarette combustion cone of the sample falls is judged to be reliable by the method.
According to the prediction results of the embodiments 1 and 2, the invention provides a brand new method for judging the falling of the cigarette combustion cone by using the existing microwave water density detection equipment, can quickly and accurately judge the falling phenomenon of the cigarette combustion cone, and has positive effects on improving the cigarette quality and reducing the falling phenomenon of the cigarette combustion cone.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention.

Claims (3)

1. A method for judging falling of a cigarette combustion cone is characterized by comprising the following steps: the method comprises the following steps:
(1) calculating the optimal theoretical density rho and the lowest theoretical density rho1First density range I1, first density range variation coefficient C1, second density range I2, and second density range variation coefficient C2: cut tobacco filling under reduction of leveling disc of cigarette making machineRecharging f, measuring the tobacco shred filling value according to the specification of YC/T152-;
(2) measuring the cigarette density: the cigarette density is measured according to the specification of YC/T476 plus 2013 microwave method for measuring the cigarette tobacco density, the number of samples is 200, the cigarette density is measured from the cigarette ignition end, the cigarette density is measured due to the fact that the tipping paper can interfere with the measurement result of the cigarette density, and the measurement data is stopped until the tipping paper moves forward by 2mm in consideration of the detection error of an instrument;
(3) calculating the sample density point is more than or equal to the optimal theoretical density ratio r:
Figure FDA0002340773720000011
(4) calculate sample mean density change angle α:
Figure FDA0002340773720000012
(5) calculating the average density of the middle section (excluding the tight head part) of the ith cigarette
Figure FDA0002340773720000014
Coefficient of variation in density C.Vi：
Figure FDA0002340773720000013
(6) Evaluating the falling probability of a group of cigarette combustion cones, wherein the larger the proportion r of a sample density point which is more than or equal to the optimal theoretical density rho is, the smaller the falling probability of the combustion cone is, and if r is similar and the absolute difference is less than 1%, the larger the sample average density change included angle α is, the smaller the falling probability of the combustion cone is;
(7) judging whether a cigarette can be burnt and the cone falls down: average density of the middle section of the ith cigarette
Figure FDA0002340773720000021
Coefficient of variation C.ViAnd best theory ofDensity rho, lowest theoretical density rho1Comparing the first judgment density interval I1, the first judgment density interval variation coefficient C1, the second judgment density interval I2 and the second judgment density interval variation coefficient C2, if the first judgment density interval I1, the first judgment density interval variation coefficient C1, the second judgment density interval variation coefficient C2 and the second judgment density interval variation coefficient are different, respectively
Figure FDA0002340773720000022
Judging that the cigarette does not have the combustion cone falling; if it is not
Figure FDA0002340773720000023
And C.ViIf the combustion cone is less than 10.8%, judging that the cigarette does not drop; if it is not
Figure FDA0002340773720000024
And C.ViMore than or equal to 10.8 percent, judging that the cigarette can generate combustion cone falling; if it is not
Figure FDA0002340773720000025
And C.ViIf the combustion cone is less than 6.7%, judging that the cigarette does not drop; if it is not
Figure FDA0002340773720000026
And C.ViMore than or equal to 6.7 percent, judging that the cigarette can generate combustion cone falling; if it is not
Figure FDA0002340773720000027
Judging that the cigarette has a combustion cone falling off;
in the step (3), wherein
is(xijRho) represents that whether each density point is larger than or equal to the optimal theoretical density or not is judged, if so, the value is 1, and if not, the value is 0;
sum[is(xij≥ρ)]representing the number of the measured data which is larger than the optimal theoretical density;
(l +1) × 200 represents the number of all measurement points;
in the step (4), the coordinate of the point A is
Figure FDA0002340773720000028
Figure FDA0002340773720000029
Representing the average of the densities at jmm for 200 cigarettes, point a being the maximum of the average densities; coordinates of point B are
Figure FDA00023407737200000210
A first point representing that the absolute value of the difference between two adjacent average density points is less than 1 from 0; the coordinate of point C is
Figure FDA00023407737200000211
The first point with the absolute value of the difference value of two adjacent average density points larger than 1 is represented from the point B;
in the step (5), wherein
Figure FDA00023407737200000212
l1 denotes the ignition end leveling disk groove arc length, of]Representing rounding;
Figure FDA00023407737200000213
Figure FDA00023407737200000214
represents rounding down;
l 2-tipping paper width +3,
Figure FDA0002340773720000031
Figure FDA0002340773720000032
2. the method for judging the falling of the cigarette combustion cone according to claim 1, characterized in that: in the step (1), calculatingOptimum theoretical density
Figure FDA0002340773720000033
Lowest theoretical density ρ1ρ × 85%, the first decision density interval I1 is [0.94 ρ, ρ), the first decision density interval coefficient of variation is 10.8%, the second decision density interval I2 is [0.85 ρ,0.94 ρ), and the second decision density interval coefficient of variation is 6.7%.
3. The method for judging the falling of the cigarette combustion cone according to claim 1, characterized in that: in the step (2), the measurement range is defined as 0-l [ cigarette length- (tipping paper width +3) ]]At a spacing of 1mm, each measurement is denoted as xijThe density value of the cigarette at jmm of the ith cigarette is shown, wherein i belongs to [1,200 ]]，j∈[0，l]。
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