CN108398355B - A method of cigarette burn rate is predicted based on detection pressure drop and Flow Field Distribution - Google Patents
A method of cigarette burn rate is predicted based on detection pressure drop and Flow Field Distribution Download PDFInfo
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- CN108398355B CN108398355B CN201810181282.8A CN201810181282A CN108398355B CN 108398355 B CN108398355 B CN 108398355B CN 201810181282 A CN201810181282 A CN 201810181282A CN 108398355 B CN108398355 B CN 108398355B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/02—Analysing materials by measuring the pressure or volume of a gas or vapour by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder
- G01N7/06—Analysing materials by measuring the pressure or volume of a gas or vapour by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder by combustion alone
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Abstract
The invention discloses it is a kind of based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate method, including the use of pressure drop detection means measurement cigarette sample suction when by mouth pressure drop；The air mass flow of burning tapered end is measured using flow detector；Utilize the burn rate under the corresponding pump orifice sequence of burn rate detection means measure；To be respectively independent variable x by mouth change in pressure drop and air mass flow1、x2, burn rate y is dependent variable, obtains the regression equation of cigarette burn rate prediction model；When measuring other cigarette smokings by after the air mass flow of mouth change in pressure drop and burning tapered end, substituting into prediction model to get the burn rate of the cigarette is arrived.Which simplify the experimentations of cigarette burning characterisitic parameter measurement, the unstable factor in basic detection method and measurement supplemented with burn rate；Simplify the data processing in conventional method.Further to instruct, cigarette material research, cigarette burn and suck mechanism analysis and cigarette material design provides basic data.
Description
Technical field
The present invention relates to a kind of methods for predicting cigarette burn rate, and in particular to one kind is based on detection pressure drop and flow field point
The method of cloth prediction cigarette burn rate.
Background technique
With the gradually reinforcement of reducing cigarette tar and reducing control coke working dynamics, the test item for needing further to study is not
Can cover by the test item and method of international regulations, wherein cigarette burning speed is since it releases coke tar in cigarette
The contribution put 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.
CN 203758946U discloses a kind of device for measuring cigarette burn rate, when which can be traced cigarette burning
The variation of quality, while flue gas is trapped, and go out cigarette burning quality loss rate according to measured correlation data calculation.
The temperature profile data of combustion cone when CN 106324181A acquires cigarette burning is spy with combustion cone internal temperature
The point situation of movement of temperature T0.5 is levied to characterize cigarette transient combustion rate.
The signal that cigarette smoking system starts suction is passed through synchronous triggering dress by CN 105527371A disclosed in this laboratory
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.
Due to the structure that the raw material composition of cigarette, auxiliary material characteristic, inner cigarette are loose, Temperature Distribution it is irregular with
And fast gas flow rate can have an impact burn rate, so that the work of measurement burn rate this respect has very big finger
Meaning is led, therefore the detection method for more establishing a kind of cigarette burn rate is necessary, above method can be supplemented.
Cigarette mainly enters main flume, respectively cigarette burning end, Cigarette from three regions during burning and sucking
The cigarette paper section of main body and there are filter tip ventilation filter segment.With the hair of smoking and health and 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.It substantially, is exactly cigarette by adjust that the factors such as auxiliary material finally change
Every section of air inlet, so that cigarette burning characterisitic parameter is influenced, as a most important cigarette burning characterisitic parameter, combustion
It burns rate and the distribution of cigarette air mass flow is also closely bound up.At the same time, the burn rate of tobacco is limited to oxygen and reaches tobacco
The mass transfer rate on surface increases because the viscosity and speed of combustion zone gas are increased with temperature, and there is air-flow in combustion zone
Relatively high resistance, and then cigarette entirety pressure drop is had an impact.
Therefore, in practical study, the correlation explored between Flow Field Distribution, pressure drop and burn rate is feasible and intentional
Justice.
Summary of the invention
To solve the deficiencies in the prior art, the purpose of the present invention is to provide one kind to be based on detection pressure drop and Flow Field Distribution,
Fast and accurately predict the method for cigarette burn rate.
In order to achieve the above objectives, the present invention adopts the following technical scheme that:
A method of cigarette burn rate is predicted based on detection pressure drop and Flow Field Distribution, comprising the following steps:
S1, using pressure drop detection means measurement cigarette sample aspirate when by mouth pressure drop；
S2, the air mass flow of burning tapered end when flow detector measurement cigarette sample suction is utilized；
S3, 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；
S4, regression analysis: with cigarette by mouth change in pressure drop and burning tapered end air mass flow be respectively independent variable x1, x2,
Burn rate y is dependent variable, obtains the regression equation of cigarette burn rate prediction model:
S5, cigarette burn rate prediction: the air mass flow by mouth change in pressure drop and burning tapered end when measurement cigarette smoking
Afterwards, above-mentioned prediction model is substituted into get the burn rate of the cigarette is arrived.
The detection method of above-mentioned pressure drop, are as follows: it is placed in pressure sensor in the pump orifice of cigarette sample, it will using processor
The pressure signal of measurement is converted to digital signal and exports in real time.
Above-mentioned pressure drop detection means include triple valve, pressure sensor, signal processor；
The pump orifice of the input termination cigarette sample of the triple valve, two output ends connect suction machine respectively, pass through pressure
Sensor connects processor；
The signal processor connects controller, and suction machine connects controller by synchronous triggering device.
The detection method of the air mass flow of above-mentioned burning tapered end, comprising the following steps:
B1, cigarette sample is clamped using cigarette clamper, is partition with the joining place of filter segment and cigarette paper section, forms two
Section sealed chamber；
B2, lighting cigarette start suction machine smoking cigarette, detect the air mass flow V1 of cigarette paper section, the air of filter segment
Total pumping volume V of flow V2 and aspiration end；
B3, it is based on flow equilibrium principle, calculates the air mass flow V3=V-V1-V2 of cigarette burning tapered end.
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 acquired image, and output data result.
Further, the frequency of the shooting of above-mentioned camera is 30-70Hz.
The duration of above-mentioned cigarette single sample single port suction is 1-3s.
Above-mentioned cigarette sample includes mixed type of the pressure drop range in 0-12kPa, Virginian-type cigarette.
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 Origin software.
The invention has the beneficial effects that:
A kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate of the invention, passes through what will be measured
Burn rate carries out regression analysis under pressure drop and burning tapered end air mass flow and corresponding pump orifice sequence, obtains cigarette burn rate
Prediction model.For unknown cigarette sample, cigarette pressure drop and burning tapered end air mass flow need to be only measured, prediction model is utilized
Obtain its burn rate numerical value.
A kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate of the invention, simplifies cigarette combustion
Characterisitic parameter measurement experiment process is burnt, burn rate, i.e. two groups of experiments can be obtained by measurement change in pressure drop and Flow Field Distribution
It can get three groups of data；Basic detection method supplemented with burn rate, and this method can be reduced in burn rate measurement not
Ballast；Simplify the data handling procedure in traditional combustion speed detection method.Further to instruct cigarette material to study,
Cigarette burns and sucks mechanism analysis and cigarette material design provides basic data, has very strong applicability and wide applicability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of flow detector of the invention.
Fig. 2 is the structural schematic diagram of pressure drop detection means of the invention.
Attached meaning marked in the figure 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 embodiment
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
Cigarette pressure drop in the present invention refers to the cigarette system under different suction modes in every mouthful of puff duration of cigarette
Pressure drop mean value.
Burn rate in the present invention refers to the speed that deflagrates under different suction modes in every mouthful of puff duration of cigarette
Rate.
Sampling: using item as defined in GB/T 16447-2004 " tobacco and tobacco product adjusts and the atmospheric environment of test "
Part balances selected cigarette sample, for acquire under different pump orifice sequences by mouth pressure drop, Flow Field Distribution and burn rate.
Cigarette sample includes any circumference, random length, any filter tip degree of ventilation and any cigarette paper section degree of ventilation, pressure
Range is dropped in the blended type cigarette sample or Virginian-type cigarette sample of 0-12kPa.
A method of cigarette burn rate is predicted based on detection pressure drop and Flow Field Distribution, comprising the following steps:
S1, using pressure drop detection means measurement cigarette sample aspirate when by mouth pressure drop.
The detection method of pressure drop are as follows: be placed in pressure sensor in the pump orifice of cigarette sample, will be measured using processor
Pressure signal be converted to digital signal and export in real time.
Pressure drop detection means of the invention include triple valve, pressure sensor, signal processor；The input of triple valve terminates
The pump orifice of cigarette sample, two output ends connect suction machine respectively, connect processor by pressure sensor；And processor connects control
Device, suction machine connect controller by synchronous triggering device.
S2, the air mass flow of burning tapered end when flow detector measurement cigarette sample suction is utilized.
Flow detector of the invention include cigarette paper section cavity 1, filter segment cavity 2, cavity 3, lateral opening 4, baffle 5,
Sealing ring 6, flow measurement component 7, the cigarette clamper 8 with through-hole (pump orifice)；
The fixed cigarette 9 in the inner end of through-hole, outside terminates suction machine；The inside of cigarette clamper 8 terminates cavity 3, the chamber
Body 3 cooperates with cigarette 9 by wheel flange, is divided into cigarette paper section cavity 1 and filter segment cavity 2；The outer wall of two sections of cavitys 3 is flexible
Wall connects flow measurement component 7 by lateral opening 4 respectively；The end of cigarette paper section cavity 1 is baffle 5, the inner ring of baffle 5 be equipped with
The sealing ring 6 that cigarette 9 contacts.
Measurement process: ISO mode (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 6 makes two sections of cavitys form sealed air chamber；Calibration zero flow measurement component 7, lighting cigarette 9, starting 9 suction machine of cigarette into
Row suction；The reading for reading flow measurement component 7 obtains entering 9 paper section air mass flow V of cigarette1With entrance filter segment air stream
Measure V2, in conjunction with total pumping volume V of aspiration end, using formula V3=V-V1-V2, obtain the air stream for entering the burning tapered end of cigarette 9
Measure V3.
Aspiration procedure is according to condition as defined in GB/T 16450-2004 " conventional analysis smoking machine defines and standard conditions "
Suction.
S3, 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 of the invention includes control module, data processing module and high speed camera (frequency acquisition
For 50Hz)；Control module is connected with suction machine, receives the suction signal of suction machine and controls figure when camera burns to cigarette 9
As being acquired；Data processing module is recorded and is handled to acquired image, 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.Input cigarette information to be measured, selection are solid in suction machine software and 9 burning velocity of cigarette measurement software (data processing module)
Measured length or fixed puff number test；After the completion of information input, " opening on 9 burning velocity of cigarette measurement software is successively clicked
" starting to aspirate " in beginning test " and suction machine software, opens cigar lighter lighting cigarette 9 immediately.
When the burning of cigarette 9 to setting length or setting mouth number, test terminates, in 9 burning velocity of cigarette measurement software
Inquire test result.Output result can show the instantaneous suction fuel and smoldering velocity that cigarette 9 burns, and it is each can also to calculate cigarette 9
The average suction fuel and smoldering velocity of mouth suction and the suction of whole branch cigarette.
S4, regression analysis: with cigarette by mouth change in pressure drop and burning tapered end air mass flow be respectively independent variable x1, x2,
Burn rate y is dependent variable, obtains the regression equation of cigarette burn rate prediction model:
Use Origin software, computation model coefficient b1、b2, c value, obtain the following table 1:
The regression equation R of table 1 burning tapered end air mass flow and burn rate2And model coefficient
As shown in Table 1, R2=0.927, illustrate that cigarette has by port system pressure drop, burning tapered end air mass flow and burn rate
There is obvious correlation, obtained relationship equation:
S5, cigarette burn rate prediction: the air mass flow by mouth change in pressure drop and burning tapered end when measurement cigarette 9 aspirates
Afterwards, above-mentioned prediction model is substituted into get the burn rate of the cigarette 9 is arrived.
The desired effects reached for the present invention is further explained, using 8 trade mark cigarette samples for having neither part nor lot in modeling, one
System pressure drop and burning tapered end air mass flow when aspect detects the suction of each sample third mouth, and with built regression equation predict its
Burn rate when three mouthfuls of suctions, burn rate when on the other hand directly acquisition third mouth aspirates.Compare under two methods
The otherness of burn rate when three mouthfuls of suctions.It the results are shown in Table 2:
Third mouth extracting combustion rate prediction value and measured value compare in 2 cigarette sample of table
Test result shows that cigarette burn rate predicted value and measured value difference are smaller, opposite both in eight 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 above embodiments do not limit the invention in any form, all obtained by the way of equivalent substitution or equivalent transformation
Technical solution is fallen within the scope of protection of the present invention.
Claims (10)
1. a kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate, which is characterized in that including following step
It is rapid:
S1, using pressure drop detection means measurement cigarette sample aspirate when by mouth pressure drop；
S2, the air mass flow of burning tapered end when flow detector measurement cigarette sample suction is utilized；
S3, 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；
S4, regression analysis: with cigarette sample by mouth pressure drop and burning tapered end air mass flow be respectively independent variable x1、x2, burning speed
Rate y is dependent variable, obtains the regression equation of cigarette burn rate prediction model:
S5, cigarette burn rate prediction: measurement cigarette smoking when by mouth change in pressure drop and burning tapered end air mass flow after, generation
Enter above-mentioned prediction model to get the burn rate of the cigarette is arrived.
2. a kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate according to claim 1,
It is characterized in that, the detection method of the pressure drop, are as follows: it is placed in pressure sensor in the pump orifice of cigarette sample, using processor
The pressure signal of measurement is converted to digital signal to export in real time.
3. a kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate according to claim 1,
It is characterized in that, the pressure drop detection means include triple valve, pressure sensor, signal processor；
The pump orifice of the input termination cigarette sample of the triple valve, two output ends connect suction machine respectively, pass through pressure sensing
Device connects processor；
The processor connects controller, and suction machine connects controller by synchronous triggering device.
4. a kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate according to claim 1,
It is characterized in that, the detection method of the air mass flow of the burning tapered end, comprising the following steps:
B1, cigarette sample is clamped using cigarette clamper, is partition with the joining place of filter segment and cigarette paper section, two sections of formation is close
Seal chamber；
B2, lighting cigarette start suction machine smoking cigarette, detect the air mass flow V1 of cigarette paper section, the air mass flow of filter segment
Total pumping volume V of V2 and aspiration end；
B3, it is based on flow equilibrium principle, calculates the air mass flow V3=V-V1-V2 of cigarette burning tapered end.
5. a kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate according to claim 1,
It is characterized in that, the 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 progress of the camera to cigarette burning when
Acquisition；Data processing module is recorded and is handled to acquired image, and output data result.
6. a kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate according to claim 5,
It is characterized in that, the frequency of the shooting of the camera is 30-70Hz.
7. a kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate according to claim 1,
It is characterized in that, the duration of the cigarette single sample single port suction is 1-3s.
8. a kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate according to claim 1,
It is characterized in that, the cigarette sample includes mixed type of the pressure drop range in 0-12kPa, Virginian-type cigarette.
9. a kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate according to claim 1,
It is characterized in that, the cigarette sample includes arbitrary circumference, length, filter tip degree of ventilation and cigarette paper section degree of ventilation.
10. a kind of method based on detection pressure drop and Flow Field Distribution prediction cigarette burn rate according to claim 1,
It is characterized in that, the model coefficient b1、b2, c exploitation, including use Origin software.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110531024A (en) * | 2019-08-02 | 2019-12-03 | 中国电子科技集团公司第四十一研究所 | A kind of cigarette test process ambient windstream regulation device |
| CN110793881B (en) * | 2019-11-06 | 2022-07-01 | 云南中烟工业有限责任公司 | Method for rapidly measuring pressure drop of filter stick in suction process |
| CN111047101B (en) * | 2019-12-18 | 2023-04-28 | 陕西中烟工业有限责任公司 | Method for predicting combustion cone head based on axial density of smoke shaft |
| CN113049036B (en) * | 2021-03-15 | 2022-11-25 | 浙江中烟工业有限责任公司 | Cigarette combustion position-smoke diffusion-dynamic resistance-suction comprehensive testing device and method |
| CN114674973A (en) * | 2022-04-06 | 2022-06-28 | 云南中烟工业有限责任公司 | Method for correcting influence of atmospheric pressure on cigarette mainstream smoke detection result |
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| CN105527371A (en) * | 2015-12-17 | 2016-04-27 | 江苏中烟工业有限责任公司 | System and method for simultaneous determination of pressure dropping changes and combustion speeds during cigarette combustion |
| CN105572306B (en) * | 2016-01-20 | 2017-12-08 | 江苏中烟工业有限责任公司 | The detection means and its method that air mass flow is distributed during a kind of cigarette smoking |
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