CN108362819A - A method of cigarette burn rate is predicted based on detection Flow Field Distribution - Google Patents
A method of cigarette burn rate is predicted based on detection Flow Field Distribution Download PDFInfo
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Abstract
The invention discloses a kind of methods for predicting cigarette burn rate based on detection Flow Field Distribution, and the air mass flow for tapered end of burning when cigarette sample suction is measured including the use of flow detector；Utilize the burn rate under the corresponding pump orifice sequence of burn rate detection means measure cigarette sample；Using the air mass flow of cigarette sample burning tapered end as independent variable x, burn rate y is dependent variable, obtains the regression equation of prediction model；When measuring cigarette smoking after the air mass flow of burning tapered end, above-mentioned prediction model is substituted into get to the prediction burn rate of the cigarette.Which simplify the experimentations that cigarette burning characterisitic parameter measures；The basic detection method of aftercombustion rate reduces the destabilizing factor during burn rate measures；Simplify the data handling procedure in burn rate detection method.Can for further instruct cigarette material research, cigarette burn and suck mechanism analysis and cigarette material design basic data is provided, have very strong practicability and wide applicability.
Description
Technical field
The present invention relates to a kind of cigarette burn rate prediction techniques, and in particular to one kind is based on detection Flow Field Distribution prediction volume
The method of cigarette burn rate.
Background technology
With the gradual reinforcement of reducing cigarette tar and reducing control coke working dynamics, the test event further studied is needed, is not
It can cover with method progress by the test event of international regulations, cigarette burning speed is since it is to coke tar in cigarette among these
The contribution of release becomes studied one outstanding.
Currently, to the research of cigarette burn rate primarily focus on Smoldering rate (cigarette when not aspirating, combustion wire edge
The Mean Speed axially promoted), it is studied in terms of the characterization for the rate that deflagrates less.
CN203758946U discloses a kind of device measuring cigarette burn rate, matter when which can be traced cigarette burning
The variation of amount, while flue gas is trapped, and go out cigarette burning quality according to measured correlation data calculation and lose rate.
The temperature profile data of combustion cone when CN106324181A acquires cigarette burning, characterized by combustion cone internal temperature
Temperature T0.5Point situation of movement characterize cigarette transient combustion rate.
The signal that cigarette smoking system is started suction by CN105527371A disclosed in this laboratory is filled by synchronous triggering
It is transferred to controller after setting capture, control order signal processing module and image capturing system start to execute, with cigarette burning
Carbon point curve is that reference target calculates burn rate.
But due to the structure that the raw material composition of cigarette, auxiliary material characteristic, inner cigarette are loose, Temperature Distribution are not advised
Then and fast gas flow rate can have an impact burn rate so that the work for measuring burn rate this respect has very greatly
Directive significance, therefore establish a kind of detection method of cigarette burn rate more and be necessary, above method can be mended
It fills.
Cigarette mainly enters main flume, respectively cigarette burning end, Cigarette during burning and sucking from three regions
The cigarette paper section of main body and there are filter tip ventilation filter segment.With smoking and health and the hair of low tar Less harmful cigarette
Exhibition, tobacco enterprise seek the technology of low-coke tar cigarette one after another, up to the present change air permeance for cigarette paper and change cigarette filter
Degree of ventilation should all be for reducing the technology of tarry matters in smoke.
Substantially, by adjust that the factors such as auxiliary material finally change be exactly every section of cigarette air inlet, to influence
Cigarette burning characterisitic parameter, as a most important cigarette burning characterisitic parameter, burn rate is distributed with cigarette air mass flow
Also closely bound up.Therefore, it is feasible by the method that cigarette Flow Field Distribution detection technique predicts burn rate.
Invention content
To solve the deficiencies in the prior art, the purpose of the present invention is to provide one kind being based on Flow Field Distribution detection technique, soon
The prediction technique of speed prediction cigarette burn rate.
In order to realize that above-mentioned target, the present invention adopt the following technical scheme that：
A method of cigarette burn rate is predicted based on detection Flow Field Distribution, is included the following steps：
S1, the air mass flow that tapered end of burning when cigarette sample aspirates is measured using flow detector；
S2, using the burn rate under the corresponding pump orifice sequence of burn rate detection means measure cigarette sample, by burning speed
Rate value is denoted as y；
S3, regression analysis：Using the air mass flow of cigarette sample burning tapered end as independent variable x, burn rate y is dependent variable,
Obtain the regression equation y=b of cigarette burn rate prediction model2x2+b1x+c；
S4, cigarette burn rate prediction：When measuring cigarette smoking after the air mass flow of burning tapered end, above-mentioned prediction mould is substituted into
Type is to get to the prediction burn rate of the cigarette.
Above-mentioned flow detector includes cigarette paper section cavity, filter segment cavity, cavity, lateral opening, baffle, sealing ring, stream
Measurement component, the cigarette clamper with through-hole；
Cigarette is fixed in the inner end of through-hole, and outside terminates suction machine；
The inside of cigarette clamper terminates cavity, which cooperates with cigarette by wheel flange, be divided into cigarette paper section cavity and
Filter segment cavity；The outer wall of two sections of cavitys is flexible wall, connects flow measurement component by lateral opening respectively；The end of cigarette paper section cavity
End is baffle, and the inner ring of baffle is equipped with the sealing ring contacted with cigarette.
Above-mentioned burn rate detection device includes control module, data processing module and image capture module, described image
Acquisition module is camera；
Control module is connected with suction machine, receives the suction signal of suction machine and controls image of the camera to cigarette burning when
It is acquired；Data processing module is recorded and is handled to the image collected, and output data result.
The duration of above-mentioned cigarette sample suction is 1-3s.
Further, the frequency of the shooting of above-mentioned camera is 30-70Hz.
Above-mentioned cigarette sample includes mixed type, fire-cured tobacco type.
Above-mentioned cigarette sample includes arbitrary circumference, length, filter tip degree of ventilation and cigarette paper section degree of ventilation.
Above-mentioned model coefficient b1、b2, c exploitation, including use PASW Statistics softwares.
The invention has the beneficial effects that：
A kind of method that cigarette burn rate is predicted based on detection Flow Field Distribution of the present invention, by plurality of specifications cigarette
In aspiration procedure, the air mass flow of the burning tapered end of measurement and burn rate are subjected to regression analysis, obtain cigarette burn rate
Prediction model.For unknown cigarette sample, the air mass flow for the tapered end that need to only be burnt by measurement cigarette is using prediction model
Its burn rate numerical value can be obtained.
A kind of method for predicting cigarette burn rate based on detection Flow Field Distribution of the present invention, simplifies cigarette burning characteristic
The experimentation of parametric measurement can be obtained burn rate by measuring Flow Field Distribution, i.e. one group of Flow Field Distribution experiment can get
Two groups of data of air mass flow and burn rate；The basic detection method of aftercombustion rate, and this method can reduce burn rate
Destabilizing factor in measurement；Simplify the data handling procedure in traditional combustion speed detection method.Can be that further guidance is rolled up
Cigarette investigation of materials, cigarette burn and suck mechanism analysis and cigarette material design provides basic data, with very strong practicability and extensively
Applicability.
Description of the drawings
Fig. 1 is the structural schematic diagram of the flow detector of the present invention.
The meaning marked in attached drawing is as follows：1, cigarette paper section cavity, 2, filter segment cavity, 3, cavity, 4, lateral opening, 5, gear
Plate, 6, sealing ring, 7, flow measurement component, 8, cigarette clamper, 9, cigarette.
Specific implementation mode
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
The burn rate of the present invention refers to the rate that deflagrates under different suction modes in cigarette puff duration.
The burn rate detection device used in the present invention is the spontaneous development of our company (CN105527371A).
A method of cigarette burn rate is predicted based on detection Flow Field Distribution, is included the following steps：
B1, sampling：Using GB/T 16447-2004《Tobacco and tobacco product adjust and the atmospheric environment of test》It is defined
Cigarette sample is selected in conditional equilibrium, for acquiring Flow Field Distribution and burn rate under different pump orifice sequences.
Cigarette sample includes the mixed of any circumference, random length, arbitrary filter tip degree of ventilation and arbitrary cigarette paper section degree of ventilation
Mould assembly cigarette sample or Virginian-type cigarette sample.
B2, the air mass flow that tapered end of burning when cigarette sample aspirates is measured using flow detector.
As shown in Fig. 1, flow detector include cigarette paper section cavity, it is filter segment cavity, cavity, lateral opening, baffle, close
Seal, flow measurement component, the cigarette clamper with through-hole；
Cigarette is fixed in the inner end of through-hole, and outside terminates suction machine；
The inside of cigarette clamper terminates cavity, which cooperates with cigarette by wheel flange, be divided into cigarette paper section cavity and
Filter segment cavity；The outer wall of two sections of cavitys is flexible wall, connects flow measurement component by lateral opening respectively；The end of cigarette paper section cavity
End is baffle, and the inner ring of baffle is equipped with the sealing ring contacted with cigarette.
Measurement process：ISO patterns (35mL) suction is carried out on the suction machine of duct using flow detector, according to cigarette
Two sections of cavitys of cigarette paper segment length regulating device under filter lengths, corresponding pump orifice sequence select Suitable closure according to cigarette circumference
Circle makes two sections of cavitys form sealed air chamber；Calibration zero flow measurement component, lighting cigarette start cigarette smoking machine and are taken out
It inhales；The reading for reading flow measurement component obtains entering cigarette paper section air mass flow V1With entrance filter segment air mass flow V2, knot
The total pumping volume V for closing aspiration end, using formula V3=V-V1-V2, obtain the air mass flow V into cigarette burning tapered end3。
B3, using the burn rate under the corresponding pump orifice sequence of burn rate detection means measure cigarette sample, by burning speed
Rate value is denoted as y.
Burn rate detection device includes control module, data processing module and high speed camera (frequency acquisition 50Hz)；
Control module is connected with suction machine, receives the suction signal of suction machine and controls image of the camera to cigarette burning when and adopts
Collection；Data processing module is recorded and is handled to the image collected, and output data result.
Detection process：The acquisition parameters of setting high-speed camera, such as filming frequency, exposure in the control module in advance
Deng.The input cigarette information to be measured in suction machine software and cigarette burning velocity determination software (data processing module), selection are solid
Measured length or fixed puff number test；After the completion of information input, clicks " start on cigarette burning velocity determination software successively
" starting to aspirate " in test " and suction machine software opens cigar lighter lighting cigarette immediately.
When cigarette burning to setting length or setting mouth number, test terminates, and is looked into cigarette burning velocity determination software
Ask test result.Output result can show the instantaneous suction fuel and smoldering velocity of cigarette burning, can also calculate cigarette every mouth pumping
The average suction fuel and smoldering velocity of suction and the suction of whole branch cigarette.
B4, regression analysis：Using the air mass flow of cigarette sample burning tapered end as independent variable x, burn rate y is dependent variable,
Obtain the regression equation y=b of cigarette burn rate prediction model2x2+b1x+c。
With PASW Statistics software exploitations, the following table 1 is obtained：
The regression equation R of table 1 burning tapered end air mass flow and burn rate2And model coefficient
As shown in Table 1, R2=0.990, it is significantly related to illustrate that burning tapered end air mass flow has to burn rate
Property, obtain the regression equation y=8.51x of the two2-370.65x+4773.93(R2=0.990).
The results of analysis of variance shows that regression equation reaches the pole level of signifiance (p<0.0001), you can to predict the regression equation
It is used as more satisfactory prediction model.
B5, cigarette burning prediction of strength：When measuring cigarette smoking after the air mass flow of burning tapered end, above-mentioned prediction mould is substituted into
Type is to get to the prediction burn rate of the cigarette.
The desired effects reached for the present invention is further explained, using 6 trade mark cigarette samples for having neither part nor lot in modeling, one
Aspect detects filter rod segments flow and cigarette paper section flow when each sample third mouth aspirates, calculates burning tapered end air mass flow,
On the other hand burn rate when built regression equation being used in combination to predict the suction of its third mouth acquires the burning speed when suction of third mouth
Rate.Compare the otherness of burn rate when third mouth aspirates under two methods.It the results are shown in Table 2.
Third mouth extracting combustion rate prediction value is compared with measured value in 2 cigarette sample of table
Test result shows that cigarette burn rate predicted value and measured value difference are smaller, opposite both in six groups of data to miss
Difference is respectively less than 10%, and the prediction result of prediction model is more accurate.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way above-described embodiment, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution is all fallen in protection scope of the present invention.
Claims (8)
1. a kind of method for predicting cigarette burn rate based on detection Flow Field Distribution, which is characterized in that include the following steps：
S1, the air mass flow that tapered end of burning when cigarette sample aspirates is measured using flow detector；
S2, using the burn rate under the corresponding pump orifice sequence of burn rate detection means measure cigarette sample, by burn rate value
It is denoted as y；
S3, regression analysis：Using the air mass flow of cigarette sample burning tapered end as independent variable x, burn rate y is dependent variable, is obtained
The regression equation of cigarette burn rate prediction model：
Y=b2x2+b1X+c, b in formula1、b2, c be model coefficient；
S4, cigarette burn rate prediction：When measuring cigarette smoking after the air mass flow of burning tapered end, above-mentioned prediction model is substituted into,
Obtain the prediction burn rate of the cigarette.
2. a kind of method for predicting cigarette burn rate based on detection Flow Field Distribution according to claim 1, feature exist
In the flow detector includes cigarette paper section cavity, filter segment cavity, cavity, lateral opening, baffle, sealing ring, flow measurement
Component, the cigarette clamper with through-hole；
Cigarette is fixed in the inner end of through-hole, and outside terminates suction machine；
The inside of cigarette clamper terminates cavity, which cooperates with cigarette by wheel flange, be divided into cigarette paper section cavity and filter tip
Section cavity；The outer wall of two sections of cavitys is flexible wall, connects flow measurement component by lateral opening respectively；The end of cigarette paper section cavity is
Baffle, the inner ring of baffle are equipped with the sealing ring contacted with cigarette.
3. a kind of method for predicting cigarette burn rate based on detection Flow Field Distribution according to claim 1, feature exist
In the burn rate detection device includes control module, data processing module and image capture module, and described image acquires mould
Block is camera；
Control module is connected with suction machine, receives the suction signal of suction machine and controls image progress of the camera to cigarette burning when
Acquisition；Data processing module is recorded and is handled to the image collected, and output data result.
4. a kind of cigarette burning intensity prediction method based on Flow Field Distribution detection technique according to claim 1, special
Sign is that the duration of the cigarette single sample suction is 1-3s.
5. a kind of cigarette burning intensity prediction method based on Flow Field Distribution detection technique according to claim 3, special
Sign is that the frequency of the shooting of the camera is 30-70Hz.
6. a kind of cigarette burning intensity prediction method based on Flow Field Distribution detection technique according to claim 1, special
Sign is that the cigarette sample includes mixed type, fire-cured tobacco type.
7. a kind of cigarette burning intensity prediction method based on Flow Field Distribution detection technique according to claim 1, special
Sign is that the cigarette sample includes arbitrary circumference, length, filter tip degree of ventilation and cigarette paper section degree of ventilation.
8. a kind of cigarette burning intensity prediction method based on Flow Field Distribution detection technique according to claim 1, special
Sign is, the model coefficient b1、b2, c exploitation, including use PASW Statistics softwares.
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| CN201810181306.XA CN108362819B (en) | 2018-03-06 | 2018-03-06 | Method for predicting cigarette burning rate based on detection of flow field distribution |
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Cited By (1)
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| CN109767815A (en) * | 2018-12-25 | 2019-05-17 | 哈尔滨工业大学 | The method simplified based on the combustion reaction mechanisms under rate uncertainty |
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