CN104266927A - Method and device for rapidly and objectively distinguishing real and counterfeit cigarettes - Google Patents

Abstract

The invention discloses a method and a device for rapidly and objectively distinguishing real and counterfeit cigarettes. The method comprises the following steps: acquiring a weightlessness curve of a to-be-detected cigarette through thermogravimetric analysis; inquiring a standard weightlessness curve related to the to-be-detected cigarette; acquiring the similarity of the to-be-detected cigarette according to the weightlessness curve of the to-be-detected cigarette and the standard weightlessness curve; judging whether the similarity of the to-be-detected cigarette is greater than a predetermined threshold value; judging the to-be-detected cigarette to be a counterfeit cigarette if the similarity of the to-be-detected cigarette is greater than the threshold value; judging the to-be-detected cigarette to be a real cigarette if the similarity of the to-be-detected cigarette is lower than or equal to the threshold value. According to the invention, real and counterfeit cigarettes are identified through thermogravimetric analysis, the cigarettes are not needed to be subjected to complicated pretreatment, no chemical agent is used, so that the system error and the personal error are greatly reduced, the automatic sample feeding can be realized, a large quantity of samples can be analyzed, and the efficiency of analysis and detection is greatly improved.

Description

The method and apparatus of quick and objective cigarette of distinguishing the true from the false

Technical field

The present invention relates to cigarette detection field, particularly a kind of method and apparatus of quick and objective cigarette of distinguishing the true from the false.

Background technology

False smoke is as a kind of illegal merchandise, the most basic feature be exactly utilize various methods palm off commercially sell there is certain popularity, various trade mark cigarette salable, this not only to disturb countries tobacco sale monopoly market order, and the interests of grievous injury consumer and healthy.

Distinguishing for true and false cigarette at present, mainly evaluate from the various sense organs of people, the packaging difference of true and false cigarette is contrasted as by Visual Observations Observations, such as box head-stamp brush, bracing wire, sealing, seal etc., can also be smoked panel test to true and false cigarette by taste and smell, but such sensory evaluation cannot distinguish true and false cigarette as the objective standard of one.

The main cause why true and false cigarette can affect suction mouthfeel is difference due to tobacco leaf formulation.The tobacco leaf that false smoke uses and the tobacco formulation that true cigarette uses are different.The technology such as prior art using visible light near infrared spectrum, galvanochemistry finger-print and HS-GC-MS total ions chromatogram carry out the true and false cigarette of objective discriminating.But, the research object of prior art is all the tobacco used in cigarette, and cigarette is as a kind of commodity, and it can meet consumer demand is not tobacco self, but the flue gas produced after tobacco pyrolysis and combustion, therefore the existing detection method accuracy for tobacco self is poor, efficiency is lower.

Summary of the invention

In view of above technical matters, the invention provides a kind of method and apparatus of quick and objective cigarette of distinguishing the true from the false, utilize thermogravimetric analysis to differentiate true and false cigarette, without the need to carrying out complicated pretreatment process to tobacco and not using any chemical reagent, thus greatly reduce systematic error and personal error, also can carry out great amount of samples analysis by auto injection, drastically increase the efficiency analyzed and detect.

According to an aspect of the present invention, a kind of method of quick and objective cigarette of distinguishing the true from the false is provided, comprises:

The weight-loss curve of cigarette to be measured is obtained by thermogravimetric analysis;

Inquire about the standard weight-loss curve be associated with described cigarette to be measured;

The similarity of cigarette to be measured is obtained according to the weight-loss curve of cigarette to be measured and standard weight-loss curve;

Judge whether the similarity of cigarette to be measured is greater than reservation threshold;

If the similarity of cigarette to be measured is greater than reservation threshold, then judge that cigarette to be measured is as false smoke; If the similarity of cigarette to be measured is not more than reservation threshold, then judge that cigarette to be measured is as true cigarette.

In one embodiment of the invention, the step being obtained the weight-loss curve of cigarette to be measured by thermogravimetric analysis is comprised: gather the temperature of cigarette sample to be measured in pyrolysis and combustion process and mass value; The weight-loss curve of cigarette to be measured is obtained by the temperature that gathers and mass value.

In one embodiment of the invention, described cigarette sample to be measured is the powdered sample grinding to form predetermined particle diameter.

In one embodiment of the invention, described predetermined particle diameter is 80-100 order.

In one embodiment of the invention, described pyrolysis and combustion process comprises: be warming up to the first temperature in a nitrogen atmosphere, after keeping the constant temperature schedule time, continues to be warming up to the second temperature.

In one embodiment of the invention, described first temperature is 373K, and described second temperature is 873K; In described pyrolysis and combustion process, heating rate is 10K/min.

In one embodiment of the invention, the step obtaining the similarity of cigarette to be measured according to the weight-loss curve of cigarette to be measured and standard weight-loss curve comprises: the difference quotient weight-loss curve weight-loss curve differentiate of cigarette to be measured being obtained to cigarette to be measured; Standard difference quotient weight-loss curve is obtained to the differentiate of standard weight-loss curve; Measured value according to differential point on the difference quotient weight-loss curve of cigarette to be measured obtains the similarity of cigarette to be measured to the standard value of corresponding differential point on standard difference quotient weight-loss curve.

In one embodiment of the invention, comprise to the step that the standard value of corresponding differential point on standard difference quotient weight-loss curve obtains the similarity of cigarette to be measured according to the measured value of differential point on the difference quotient weight-loss curve of cigarette to be measured: according to formula

$S_N=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{{[{(\mathrm{dm}/\mathrm{dT})}_i-{(\mathrm{dm}/\mathrm{dT})}_i^{\mathrm{av}}]}^2}{N{(\mathrm{dm}/\mathrm{dT})}_{\max }^{\mathrm{av}}}$

Obtain the similarity S of cigarette to be measured _n, wherein N represents the differential point number on difference quotient weight-loss curve, N be greater than 0 natural number; T refers to temperature; M is sample quality number percent at T temperature; (dm/dT) _iit is the measured value of differential point i on cigarette difference quotient weight-loss curve to be measured; it is the standard value of differential point i on standard difference quotient weight-loss curve; it is the maximal value of the standard value representing all differential points on standard difference quotient weight-loss curve.

According to a further aspect in the invention, a kind of device of quick and objective cigarette of distinguishing the true from the false is provided, comprises curve acquisition unit, typical curve query unit, similarity determining unit, recognition unit, identifying unit, wherein:

Curve acquisition unit, for obtaining the weight-loss curve of cigarette to be measured by thermogravimetric analysis;

Typical curve query unit, for inquiring about the standard weight-loss curve be associated with described cigarette to be measured;

Similarity determining unit, for obtaining the similarity of cigarette to be measured according to the weight-loss curve of cigarette to be measured and standard weight-loss curve;

Recognition unit, for judging whether the similarity of cigarette to be measured is greater than reservation threshold;

Identifying unit, for the judged result according to recognition unit, when the similarity of cigarette to be measured is greater than reservation threshold, judges that cigarette to be measured is as false smoke; When the similarity of cigarette to be measured is not more than reservation threshold, judge that cigarette to be measured is as true cigarette.

In one embodiment of the invention, curve acquisition unit comprises data acquisition module, curve acquisition module, wherein:

Data acquisition module, for gathering the temperature of cigarette sample to be measured in pyrolysis and combustion process and mass value;

Curve acquisition module, obtains the weight-loss curve of cigarette to be measured for the temperature by gathering and mass value.

In one embodiment of the invention, described cigarette sample to be measured is the powdered sample grinding to form predetermined particle diameter.

In one embodiment of the invention, described predetermined particle diameter is 80-100 order.

In one embodiment of the invention, described pyrolysis and combustion process comprises: be warming up to the first temperature in a nitrogen atmosphere, after keeping the constant temperature schedule time, continues to be warming up to the second temperature.

In one embodiment of the invention, described first temperature is 373K, and described second temperature is 873K; In described pyrolysis and combustion process, heating rate is 10K/min.

In one embodiment of the invention, similarity determining unit comprises the first differentiate module, the second differentiate module and phase knowledge and magnanimity determination module, wherein:

First differentiate module, for obtaining the difference quotient weight-loss curve of cigarette to be measured to the weight-loss curve differentiate of cigarette to be measured;

Second differentiate module, for obtaining standard difference quotient weight-loss curve to the differentiate of standard weight-loss curve;

Phase knowledge and magnanimity determination module, obtains the similarity of cigarette to be measured for the measured value according to differential point on the difference quotient weight-loss curve of cigarette to be measured to the standard value of corresponding differential point on standard difference quotient weight-loss curve.

In one embodiment of the invention, phase knowledge and magnanimity determination module is specifically according to formula

$S_N=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{{[{(\mathrm{dm}/\mathrm{dT})}_i-{(\mathrm{dm}/\mathrm{dT})}_i^{\mathrm{av}}]}^2}{N{(\mathrm{dm}/\mathrm{dT})}_{\max }^{\mathrm{av}}}$

Obtain the similarity S of cigarette to be measured _n, wherein N represents the differential point number on difference quotient weight-loss curve, N be greater than 0 natural number; T refers to temperature; M is sample quality number percent at T temperature; (dm/dT) _iit is the measured value of differential point i on cigarette difference quotient weight-loss curve to be measured; it is the standard value of differential point i on standard difference quotient weight-loss curve; it is the maximal value of the standard value representing all differential points on standard difference quotient weight-loss curve.

The present invention utilizes thermogravimetric analysis to differentiate true and false cigarette, without the need to carrying out complicated pretreatment process to tobacco and not using any chemical reagent, thus greatly reduce systematic error and personal error, also can carry out great amount of samples analysis by auto injection, drastically increase the efficiency analyzed and detect.

Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the schematic diagram of a method embodiment of the quick and objective cigarette of distinguishing the true from the false of the present invention.

Fig. 2 is the schematic diagram obtaining cigarette weight-loss curve to be measured in one embodiment of the present of invention.

Fig. 3 is the schematic diagram obtaining cigarette similarity to be measured in one embodiment of the present of invention.

Fig. 4 is the schematic diagram of a device embodiment of the quick and objective cigarette of distinguishing the true from the false of the present invention.

Fig. 5 is the schematic diagram of curve acquisition unit in one embodiment of the present of invention.

Fig. 6 is the schematic diagram of similarity determining unit in one embodiment of the present of invention.

Fig. 7 is the schematic diagram of the DTG curve (373K-873K) of 5 batches of true cigarettes of certain brand in one embodiment of the present of invention.

The partial enlarged drawing of Fig. 7 when Fig. 8 is 500K-650K.

Fig. 9 is the schematic diagram of the DTG curve (373K-873K) of the true and false cigarette of certain brand in one embodiment of the present of invention.

The partial enlarged drawing of Fig. 9 when Figure 10 is 450K-550K.

The partial enlarged drawing of Fig. 9 when Figure 11 is 550K-600K.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.

Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.

May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing instructions.

In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.

It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.

Fig. 1 is the schematic diagram of a method embodiment of the quick and objective cigarette of distinguishing the true from the false of the present invention.Preferably, the present embodiment can be performed by the device of quick and objective cigarette of distinguishing the true from the false.The method comprises the following steps:

Step 101, obtains the weight-loss curve of cigarette to be measured by thermogravimetric analysis.

Thermogravimetric analysis is under temperature programmed control, the mass loss rate variation with temperature relation of measurement of species.Cigarette, when aspirating, is exactly mainly that tobacco at high temperature there occurs pyrolysis and combustion reaction.Utilize thermogravimetric analysis to differentiate that true and false cigarette more can reflect the state that cigarette generation pyrolysis and combustion reacts really.The mass loss rate along with temperature rising when tobacco generation pyrolysis and combustion reacts can be obtained by thermogravimetric analysis, selected by true and false cigarette, obtain the difference of tobacco leaf formulation, the different thermogravimetric forms of expression will be presented when thermogravimetric analysis.

In one embodiment of the invention, as shown in Figure 2, step 101 can comprise:

Step 1011, gathers the temperature of cigarette sample to be measured in pyrolysis and combustion process and mass value.

Step 1012, obtain the weight-loss curve of cigarette to be measured by the temperature that gathers and mass value, wherein weightless (TG) curve is the variation relation under temperature programmed control between sample quality and temperature.

In one embodiment of the invention, described cigarette sample to be measured is the powdered sample grinding to form predetermined particle diameter.

In one embodiment of the invention, described predetermined particle diameter is 80-100 order.Sample particle diameter size is also the key factor affecting pyrolysis, and the repeatability of small particle diameter sample pyrolysis is better, so select 80 ~ 100 order samples.

In one embodiment of the invention, described pyrolysis and combustion process comprises: be warming up to the first temperature in a nitrogen atmosphere, after keeping the constant temperature schedule time, continues to be warming up to the second temperature.

In one embodiment of the invention, take appropriate tobacco powder and carry out thermogravimetric test, sample is warming up to 373K in a nitrogen atmosphere, keep constant temperature 30min, continue to be warming up to 873K, heating rate is 10K/min, and the flow of carrier gas is 100mL/min, cigarette to be measured is tested in triplicate, obtains mean value.Due to the difference of moisture content of cut tobaccos, pyrolysis behavior difference thus affect testing result to some extent can be caused.Therefore each sample is increased to 373K from room temperature, keeps constant temperature 30min, remove the impact of moisture.Under only close at water percentage, sample granularity condition within the specific limits, qualification result just has comparability.

Step 102, inquires about the standard weight-loss curve be associated with described cigarette to be measured.The standard weight-loss curve of each brand cigarette is previously stored with in database of the present invention.The wherein acquisition process of certain brand cigarette standard weight-loss curve, be to N number of batch (N be greater than 1 natural number) this brand genuine piece cigarette carries out the thermogravimetric analysis similar with step 101, obtain mean value afterwards, the standard weight-loss curve of this brand cigarette can be obtained.

Step 103, obtains the similarity of cigarette to be measured according to the weight-loss curve of cigarette to be measured and standard weight-loss curve.

Step 104, judges whether the similarity of cigarette to be measured is greater than reservation threshold.If the similarity of cigarette to be measured is greater than reservation threshold, then perform step 105; Otherwise, if the similarity of cigarette to be measured is not more than reservation threshold, then perform step 106.

Step 105, judges that cigarette to be measured is as false smoke.

Step 106, judges that cigarette to be measured is as true cigarette.

Based on the method for the quick and objective cigarette of distinguishing the true from the false that the above embodiment of the present invention provides, utilize thermogravimetric analysis to differentiate true and false cigarette, without the need to carrying out complicated pretreatment process to tobacco and not using any chemical reagent, thus can objective, quick, science, identify true and false cigarette exactly, greatly reduce systematic error and personal error, also can carry out great amount of samples analysis by auto injection, and drastically increase the efficiency analyzed and detect.

In one embodiment of the invention, as shown in Figure 3, step 103 can comprise:

Step 1031, obtains the difference quotient weight-loss curve of cigarette to be measured to the weight-loss curve differentiate of cigarette to be measured.

Step 1032, obtains standard difference quotient weight-loss curve to the differentiate of standard weight-loss curve.

Step 1033, the measured value according to differential point on the difference quotient weight-loss curve of cigarette to be measured obtains the similarity of cigarette to be measured to the standard value of corresponding differential point on standard difference quotient weight-loss curve.

In the above embodiment of the present invention, in order to make tobacco pyrolysis behavior more obvious, differentiate is carried out to TG curve, obtain difference quotient weightlessness (DTG) curve, it reflects the relation of mass change and temperature, can identify true and false cigarette more accurately thus, and improves the efficiency analyzed and detect.

In one embodiment of the invention, step 1033 specifically can comprise: the similarity S obtaining cigarette to be measured according to formula (1) _n,

$S_N=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{{[{(\mathrm{dm}/\mathrm{dT})}_i-{(\mathrm{dm}/\mathrm{dT})}_i^{\mathrm{av}}]}^2}{N{(\mathrm{dm}/\mathrm{dT})}_{\max }^{\mathrm{av}}}---\left(1\right)$

Wherein, N represents the differential point number on difference quotient weight-loss curve, N be greater than 0 natural number; (dm/dT) _iit is the measured value of differential point i on cigarette difference quotient weight-loss curve to be measured; T refers to temperature; M is sample quality number percent at T temperature; it is the standard value of differential point i on standard difference quotient weight-loss curve; the maximal value of the standard value (absolute value) representing all differential points on standard difference quotient weight-loss curve, the namely mass change of maximal peak point on standard difference quotient weight-loss curve.

In one embodiment of the invention, final similarity can be represented by mean square deviation rms (%):

$\mathrm{rms}(\%)=100S_N^{0.5}---\left(2\right)$

From formula (2), rms (%) is less, then similarity degree is higher, if rms (%) exceedes certain threshold value, illustrates that pyrolysis curve diversity factor is large, illustrates that this sample is false smoke.

In one embodiment of the invention, step 104 can comprise: judge whether the final similarity rms (%) of cigarette to be measured is greater than reservation threshold.

In one embodiment of the invention, described reservation threshold can be 1.5.

Fig. 4 is the schematic diagram of a device embodiment of the quick and objective cigarette of distinguishing the true from the false of the present invention.As shown in Figure 4, the device of described quick and objective cigarette of distinguishing the true from the false comprises curve acquisition unit 401, typical curve query unit 402, similarity determining unit 403, recognition unit 404, identifying unit 405, wherein:

Curve acquisition unit 401, for obtaining the weight-loss curve of cigarette to be measured by thermogravimetric analysis.

Typical curve query unit 402, for inquiring about the standard weight-loss curve be associated with described cigarette to be measured.The standard weight-loss curve of each brand cigarette is previously stored with in database of the present invention.The wherein acquisition process of certain brand cigarette standard weight-loss curve, be to N number of batch (N be greater than 1 natural number) this brand genuine piece cigarette carries out the thermogravimetric analysis similar with step 101, obtain mean value afterwards, the standard weight-loss curve of this brand cigarette can be obtained.

Similarity determining unit 403, for obtaining the similarity of cigarette to be measured according to the weight-loss curve of cigarette to be measured and standard weight-loss curve.

Recognition unit 404, for judging whether the similarity of cigarette to be measured is greater than reservation threshold.

Identifying unit 405, for the judged result according to recognition unit 404, when the similarity of cigarette to be measured is greater than reservation threshold, judges that cigarette to be measured is as false smoke; When the similarity of cigarette to be measured is not more than reservation threshold, judge that cigarette to be measured is as true cigarette.

Based on the device of the quick and objective cigarette of distinguishing the true from the false that the above embodiment of the present invention provides, utilize thermogravimetric analysis to differentiate true and false cigarette, without the need to carrying out complicated pretreatment process to tobacco and not using any chemical reagent, thus can objective, quick, science, identify true and false cigarette exactly, greatly reduce systematic error and personal error, also can carry out great amount of samples analysis by auto injection, and drastically increase the efficiency analyzed and detect.

In one embodiment of the invention, as shown in Figure 5, the curve acquisition unit 401 described in Fig. 4 comprises data acquisition module 4011, curve acquisition module 4012, wherein:

Data acquisition module 4011, for gathering the temperature of cigarette sample to be measured in pyrolysis and combustion process and mass value.

Curve acquisition module 4012, obtains the weight-loss curve of cigarette to be measured for the temperature by gathering and mass value, wherein weightless (TG) curve is the variation relation under temperature programmed control between sample quality and temperature.

In one embodiment of the invention, described cigarette sample to be measured is the powdered sample grinding to form predetermined particle diameter.

In one embodiment of the invention, described predetermined particle diameter is 80-100 order.Sample particle diameter size is also the key factor affecting pyrolysis, and the repeatability of small particle diameter sample pyrolysis is better, so select 80 ~ 100 order samples.

In one embodiment of the invention, described pyrolysis and combustion process comprises: be warming up to the first temperature in a nitrogen atmosphere, after keeping the constant temperature schedule time, continues to be warming up to the second temperature.

In one embodiment of the invention, take appropriate tobacco powder and carry out thermogravimetric test, sample is warming up to 373K in a nitrogen atmosphere, keep constant temperature 30min, continue to be warming up to 873K, heating rate is 10K/min, and the flow of carrier gas is 100mL/min, cigarette to be measured is tested in triplicate, obtains mean value.Due to the difference of moisture content of cut tobaccos, pyrolysis behavior difference thus affect testing result to some extent can be caused.Therefore each sample is increased to 373K from room temperature, keeps constant temperature 30min, remove the impact of moisture.Under only close at water percentage, sample granularity condition within the specific limits, qualification result just has comparability.

In one embodiment of the invention, described cigarette sample to be measured is the powdered sample grinding to form predetermined particle diameter.

In one embodiment of the invention, described predetermined particle diameter is 80-100 order.

In one embodiment of the invention, described pyrolysis and combustion process comprises: be warming up to the first temperature in a nitrogen atmosphere, after keeping the constant temperature schedule time, continues to be warming up to the second temperature.

In one embodiment of the invention, described first temperature is 373K, and described second temperature is 873K; In described pyrolysis and combustion process, heating rate is 10K/min.

In one embodiment of the invention, as shown in Figure 6, the similarity determining unit 403 described in Fig. 4 comprises the first differentiate module 4031, second differentiate module 4032 and phase knowledge and magnanimity determination module 4033, wherein:

First differentiate module 4031, for obtaining the difference quotient weight-loss curve of cigarette to be measured to the weight-loss curve differentiate of cigarette to be measured.

Second differentiate module 4032, for obtaining standard difference quotient weight-loss curve to the differentiate of standard weight-loss curve.

Phase knowledge and magnanimity determination module 4033, obtains the similarity of cigarette to be measured for the measured value according to differential point on the difference quotient weight-loss curve of cigarette to be measured to the standard value of corresponding differential point on standard difference quotient weight-loss curve.

In the above embodiment of the present invention, in order to make tobacco pyrolysis behavior more obvious, differentiate is carried out to TG curve, obtain difference quotient weightlessness (DTG) curve, it reflects the relation of mass change and temperature, can identify true and false cigarette more accurately thus, and improves the efficiency analyzed and detect.

In one embodiment of the invention, phase knowledge and magnanimity determination module specifically can obtain the similarity S of cigarette to be measured according to formula (1) _n.

In one embodiment of the invention, final similarity can be represented by mean square deviation rms (%), and wherein mean square deviation rms (%) can be obtained by formula (2).

In one embodiment of the invention, recognition unit 404 is specifically for judging whether the final similarity rms (%) of cigarette to be measured is greater than reservation threshold.

In one embodiment of the invention, described reservation threshold can be 1.5.

At curve acquisition unit 401 described above, typical curve query unit 402, similarity determining unit 403, recognition unit 404, functional unit such as identifying unit 405 grade can be implemented as the general processor for performing function described by the application, programmable logic controller (PLC) (PLC), digital signal processor (DSP), special IC (ASIC), field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components or it is appropriately combined arbitrarily.

Below by concrete example, the present invention will be described:

In one embodiment of the invention, the method of described quick and objective cigarette of distinguishing the true from the false can comprise: the thermogravimetric DTG curve experimentally obtaining the true cigarette of different batches brand, the mean value that repeats for 3 times to test is calculated as the DTG curve of each batch, specifically see Fig. 7 and Fig. 8 for each batch.Ask 5 batches of DTG averages, as the standard DTG curve of this brand, the results are shown in Table 1, table 1 is the DTG data point of 5 batches of true cigarettes.

TGA experimental record be the relation of quality and temperature, quality (wt.%) is carried out differentiate to temperature (K), obtains DTG data.Due to one time, experimental record counts about 6000, and inconvenience is in this list, so take equidistantly to get a method, to list 21 points be that example carries out calculatings demonstration, in fact still calculates a little with whole interval.

Table 1

As shown in table 1, obtain the DTG data of 5 batches of true cigarettes of this brand, ask the mean value of 5 batches, the standard DTG curve of this brand cigarette can be obtained thus.Also by the DTG curve of matching 5 batches of true cigarettes of this brand as shown in Figure 7, the standard DTG curve of this brand cigarette can be obtained in the present invention.

In the present embodiment, by above experimental result, the threshold value of the true and false cigarette of given judgement is 1.5, if rms (%) is less than 1.5, then thinks that this sample is true cigarette.If be greater than 1.5, then this sample is false smoke.

Then, the S of each batch of true cigarette can be calculated according to formula (1) _n, in the calculating of such as batch 1: experiment is counted N=5925, (dm/dT) _iit is the DTG value of batch 1 sample; the DTG value of sample standard curve, i.e. the DTG average of 5 samples; be the maximal value (absolute value) representing average, namely maximal peak point, is 0.43354, so just can obtains S _n=8.98704 × 10 ^-5.Calculating rms (%) by formula (2) is 0.948.In like manner calculate the rms (%) of other batches, specifically can see table 2, table 2 is the similarity of different batches true cigarette DTG curve.

Table 2

Can find out that from Fig. 7 and Fig. 8 the DTG curve co-insides degree between 5 batch sample cigarette is higher, rms (%) is all less than 1, the pyrolysis behavior describing same cigarette by batch to affect, so just can't can get rid of the impact of batch difference and human factor.

In embodiment described in Fig. 9-Figure 11, cigarette to be measured is false smoke, can be obtained the thermogravimetric DTG curve of false smoke by experiment, the DTG curve of cigarette to be measured and this sample standard curve are compared, sees Fig. 9-Figure 11, and calculate rms (%), be 4.769, judge that this sample is false smoke.

There is marked difference between the standard DTG curve can finding out cigarette to be measured and true cigarette from Fig. 9-Figure 11, there is obvious difference (see Figure 10 and Figure 11) in the mass loss rate especially in these 2 temperature ranges of 450 ~ 550K and 550 ~ 600K.This is because the compositional difference of true and false cigarette is comparatively large, and sample component determines pyrolysis behavior, so pyrolysis curve performance is also different, this sample system counterfeit and shoddy goods is described.In fact, testing result conforms to actual.

So far, the present invention is described in detail.In order to avoid covering design of the present invention, details more known in the field are not described.Those skilled in the art, according to description above, can understand how to implement technical scheme disclosed herein completely.

One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.

Claims (16)

1. a method for quick and objective cigarette of distinguishing the true from the false, is characterized in that, comprising:

The weight-loss curve of cigarette to be measured is obtained by thermogravimetric analysis;

Inquire about the standard weight-loss curve be associated with described cigarette to be measured;

The similarity of cigarette to be measured is obtained according to the weight-loss curve of cigarette to be measured and standard weight-loss curve;

Judge whether the similarity of cigarette to be measured is greater than reservation threshold;

If the similarity of cigarette to be measured is greater than reservation threshold, then judge that cigarette to be measured is as false smoke; If the similarity of cigarette to be measured is not more than reservation threshold, then judge that cigarette to be measured is as true cigarette.

2. method according to claim 1, is characterized in that, the step being obtained the weight-loss curve of cigarette to be measured by thermogravimetric analysis is comprised:

Gather the temperature of cigarette sample to be measured in pyrolysis and combustion process and mass value;

The weight-loss curve of cigarette to be measured is obtained by the temperature that gathers and mass value.

3. method according to claim 2, is characterized in that,

Described cigarette sample to be measured is the powdered sample grinding to form predetermined particle diameter.

4. method according to claim 3, is characterized in that,

Described predetermined particle diameter is 80-100 order.

5. method according to claim 2, is characterized in that, described pyrolysis and combustion process comprises:

Be warming up to the first temperature in a nitrogen atmosphere, after keeping the constant temperature schedule time, continue to be warming up to the second temperature.

6. method according to claim 5, is characterized in that,

Described first temperature is 373K, and described second temperature is 873K;

In described pyrolysis and combustion process, heating rate is 10K/min.

7. method according to claim 1, is characterized in that, the step obtaining the similarity of cigarette to be measured according to the weight-loss curve of cigarette to be measured and standard weight-loss curve comprises:

The weight-loss curve differentiate of cigarette to be measured is obtained to the difference quotient weight-loss curve of cigarette to be measured;

Standard difference quotient weight-loss curve is obtained to the differentiate of standard weight-loss curve;

Measured value according to differential point on the difference quotient weight-loss curve of cigarette to be measured obtains the similarity of cigarette to be measured to the standard value of corresponding differential point on standard difference quotient weight-loss curve.

8. method according to claim 7, is characterized in that, comprises according to the step that measured value and the standard value of corresponding differential point on standard difference quotient weight-loss curve of differential point on the difference quotient weight-loss curve of cigarette to be measured obtain the similarity of cigarette to be measured:

According to formula

$S_N=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{{[{(\mathrm{dm}/\mathrm{dT})}_i-{(\mathrm{dm}/\mathrm{dT})}_i^{\mathrm{av}}]}^2}{N{(\mathrm{dm}/\mathrm{dT})}_{\max }^{\mathrm{av}}}$

Obtain the similarity S of cigarette to be measured _n, wherein N represents the differential point number on difference quotient weight-loss curve, N be greater than 0 natural number; T refers to temperature; M is sample quality number percent at T temperature; (dm/dT) _iit is the measured value of differential point i on cigarette difference quotient weight-loss curve to be measured; it is the standard value of differential point i on standard difference quotient weight-loss curve; it is the maximal value of the standard value representing all differential points on standard difference quotient weight-loss curve.

9. a device for quick and objective cigarette of distinguishing the true from the false, is characterized in that, comprises curve acquisition unit, typical curve query unit, similarity determining unit, recognition unit, identifying unit, wherein:

Curve acquisition unit, for obtaining the weight-loss curve of cigarette to be measured by thermogravimetric analysis;

Typical curve query unit, for inquiring about the standard weight-loss curve be associated with described cigarette to be measured;

Similarity determining unit, for obtaining the similarity of cigarette to be measured according to the weight-loss curve of cigarette to be measured and standard weight-loss curve;

Recognition unit, for judging whether the similarity of cigarette to be measured is greater than reservation threshold;

Identifying unit, for the judged result according to recognition unit, when the similarity of cigarette to be measured is greater than reservation threshold, judges that cigarette to be measured is as false smoke; When the similarity of cigarette to be measured is not more than reservation threshold, judge that cigarette to be measured is as true cigarette.

10. device according to claim 9, is characterized in that, curve acquisition unit comprises data acquisition module, curve acquisition module, wherein:

Data acquisition module, for gathering the temperature of cigarette sample to be measured in pyrolysis and combustion process and mass value;

Curve acquisition module, obtains the weight-loss curve of cigarette to be measured for the temperature by gathering and mass value.

11. devices according to claim 10, is characterized in that,

Described cigarette sample to be measured is the powdered sample grinding to form predetermined particle diameter.

12. devices according to claim 11, is characterized in that,

Described predetermined particle diameter is 80-100 order.

13. devices according to claim 10, is characterized in that, described pyrolysis and combustion process comprises:

Be warming up to the first temperature in a nitrogen atmosphere, after keeping the constant temperature schedule time, continue to be warming up to the second temperature.

14. devices according to claim 13, is characterized in that,

Described first temperature is 373K, and described second temperature is 873K;

In described pyrolysis and combustion process, heating rate is 10K/min.

15. devices according to claim 9, is characterized in that, similarity determining unit comprises the first differentiate module, the second differentiate module and phase knowledge and magnanimity determination module, wherein:

First differentiate module, for obtaining the difference quotient weight-loss curve of cigarette to be measured to the weight-loss curve differentiate of cigarette to be measured;

Second differentiate module, for obtaining standard difference quotient weight-loss curve to the differentiate of standard weight-loss curve;

Phase knowledge and magnanimity determination module, obtains the similarity of cigarette to be measured for the measured value according to differential point on the difference quotient weight-loss curve of cigarette to be measured to the standard value of corresponding differential point on standard difference quotient weight-loss curve.

16. devices according to claim 15, is characterized in that,

Phase knowledge and magnanimity determination module is specifically according to formula

$S_N=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{{[{(\mathrm{dm}/\mathrm{dT})}_i-{(\mathrm{dm}/\mathrm{dT})}_i^{\mathrm{av}}]}^2}{N{(\mathrm{dm}/\mathrm{dT})}_{\max }^{\mathrm{av}}}$

Obtain the similarity S of cigarette to be measured _n, wherein N represents the differential point number on difference quotient weight-loss curve, N be greater than 0 natural number; T refers to temperature; M is sample quality number percent at T temperature; (dm/dT) _iit is the measured value of differential point i on cigarette difference quotient weight-loss curve to be measured; it is the standard value of differential point i on standard difference quotient weight-loss curve; it is the maximal value of the standard value representing all differential points on standard difference quotient weight-loss curve.