CN102506731A - Method for detecting reconstituted tobacco thickness in papermaking process by utilizing near infrared spectrums - Google Patents
Method for detecting reconstituted tobacco thickness in papermaking process by utilizing near infrared spectrums Download PDFInfo
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Abstract
The invention relates to a method for detecting reconstituted tobacco thickness in papermaking process by utilizing near infrared spectrums, which includes the following steps: collecting a sample, screening a modeling sample, collecting original spectrums, pretreating spectrums, establishing a quantitative model, optimizing the quantitative model, checking the model and determining reconstituted tobacco thickness. By adopting the method, the reconstituted tobacco thickness in the papermaking process can be quickly and accurately detected.
Description
Technical field
The present invention relates to a kind of detection method of papermaking-method reconstituted tobaccos product thickness index.
Background technology
The meaning that the thickness of papermaking-method reconstituted tobaccos detects mainly is: 1. measure the matching with natural tobacco leaf.Reconstituted tobacco is mixed into to roll in the natural tobacco leaf as a kind of artificial tobacco leaf and is cigarette product, if its thickness and natural tobacco leaf difference are bigger, its homogeneity of mixing with natural tobacco leaf can be affected in outcome procedure, thereby influences overall quality and the performance that cigarette props up.2. reconstituted tobacco thinner thickness, its processing intensity does not reach requirement, in the cigarette process, causes a rate to reduce easily, too high after, its fired state changes, and causes tar and carbon monoxide burst size to raise.Therefore, seem particularly important in the quality control that is controlled at papermaking-method reconstituted tobaccos of thickness.
The standard detecting method of the papermaking-method reconstituted tobaccos thickness of industry standard recommendation at present is the assay method of paper and cal(l)iper; It is primarily aimed at the surface relatively paper and the cardboard of smooth, its principle be certain pressure condition under between two surfaces of application ultimate range characterize the thickness of paper and cardboard.Yet the papermaking-method reconstituted tobaccos surface is more coarse on the one hand, and what its measurement result characterized is the maximum ga(u)ge between two faces of reconstituted tobacco, causes certain deviation for sign reconstituted tobacco interior quality and stability; On the other hand; Papermaking-method reconstituted tobaccos is with respect to common paper and cardboard, and its better softness is used the measuring method of paper and cal(l)iper and measured papermaking-method reconstituted tobaccos thickness; Soft in the mensuration process because of sample; Sample progressively is compressed after receiving certain pressure, and the less stable of reading is not easy to accurately read measurement data.
Near Infrared Spectroscopy Detection Technology mainly absorbs based on the frequency multiplication and the sum of fundamental frequencies of near infrared light to hydrogeneous radicals X-H (X=C, N, O) vibration; The information that has wherein comprised the composition and the molecular structure of most of type organic compounds; Be mainly used in the detection of chemical index at present; Near-infrared spectral analysis technology has report at aspects such as tobacco components, style, homogeneity detections at present, does not appear in the newspapers but be used for the papermaking-method reconstituted tobaccos thickness measuring method.
Summary of the invention
The objective of the invention is to be not suitable for weak points such as surface measurements rough samples, measurement reading poor stability, a kind of method that can quick and precisely detect papermaking-method reconstituted tobaccos thickness is provided to being used for the papermaking-method reconstituted tobaccos thickness measuring method at present.
The present invention adopts near-infrared spectrum technique that papermaking-method reconstituted tobaccos thickness of product index is carried out quick nondestructive and detects, and can improve analysis efficiency, practices thrift cost.Has fairly obvious beneficial effect for stablizing control papermaking-method reconstituted tobaccos product interior quality, bringing into play papermaking-method reconstituted tobaccos stable roll smoke product quality and mould the cigarette style.
The present invention efficiently solves prior art and detects reconstituted tobacco thickness and receive the problem that the coarse and sample surfaces raised points of sample surfaces influences the testing result accuracy and objectively responds inside quality; Can effectively avoid simultaneously because the result that the reading stability difference causes characterizes accuracy; Changed the pattern that the classic method single index detects respectively, can realize that indexs such as chemical index and thickness detect simultaneously, provide testing result simultaneously; It is fast to have detection speed; Pollution-free, environmental protection, the characteristics that accuracy is high.
Embodiment
Through embodiment the present invention is done further detailed description below, but they not to qualification of the present invention.
Utilize near infrared spectrum to detect the method for papermaking-method reconstituted tobaccos thickness index, may further comprise the steps:
1. collect sample: collect and prepare a collection of reconstituted tobacco sample; The sample of collecting is estimated; Reject the surface and obvious convexity and naked eyes are arranged it is thus clear that the sample of hole; Remaining sample carries out sample moisture under the temperature of standard conditions regulation, humidity regulates, and utilizes standard method that collected sample is carried out Determination of thickness one by one, obtains quantitative reference data; Said standard method is meant reference to standard GB/T451.3 " determination method of paper and cal(l)iper " in Chinese tobacco industry recommended standard YC/T16.3-2003 " reconstituted tobacco third part: the paper process " test method; Standard conditions are GB/T 16447 " atmospheric environment that tobacco and tobacco product are regulated and tested " defined terms;
2. modeling sample screening: according to the quantitative reference data of standard method mensuration; Screen and replenish out sample segment; Make the sample reference data cover the reconstituted tobacco sample detection scope interval state that is evenly distributed basically that fetches data, with the accurate reliability that guarantees to detect after the modelling;
3. gather original spectrum: the sample that 2. step is obtained is tiled on the scanning backing plate one by one, adopts with specscan system scanning and passes through the spectrum that the reflection mode is gathered each sample, and whole probe contacts tightly during scanning with sample, avoids natural light to inject scanning head;
4. spectrum pre-service: the original spectrum that collects is carried out level and smooth and single order or second order differentiate pre-service, abate the noise and the influence of baseline wander;
5. set up quantitative model: the spectroscopic data that 4. step is obtained after the pre-service and the thickness reference data that the modeling sample standard method that 2. step obtains obtains are carried out corresponding one by one, adopt PLS and cross-check to set up quantitative model;
6. optimize quantitative model: adopt these two parameters of spectrum influence value (Leverage) and measured value error (residual) to reject the exceptional value of spectrum and measured value; Number of principal components to model is optimized; Improve the correlativity of model; Set up quantitative model more accurately, be kept in the computing machine;
The used specscan system of the inventive method can adopt prior art equipment.The assay method of being addressed that spectrum is carried out level and smooth and single order or second order differentiate preprocess method, PLS and cross-check method, spectrum influence value (Leverage) and measured value error (residual) is prior art.
Embodiment 1
Utilize near infrared spectrum to detect the method for papermaking-method reconstituted tobaccos thickness, step is following:
1. collect the sample of preparing 300-500 different papermaking-method reconstituted tobaccos product lines; The sample of collecting is estimated; Reject the surface and obvious convexity and human eye are arranged it is thus clear that the sample of hole; Remaining sample is regulated collected sample by the humiture and the time requirement of GB/T 16447 " atmospheric environment that tobacco and tobacco product are regulated and tested " prescriptive procedure; Regulate the back and carry out Determination of thickness one by one, obtain the quantitative reference data of thickness by GB/T451.3 " determination method of paper and cal(l)iper " method.
2. sample segment is screened and replenished out to the quantitative reference data of measuring according to standard method, makes the sample reference data cover reconstituted tobacco sample detection scope and the data interval state that is evenly distributed basically, with the accurate reliability that guarantees to detect after the modelling.
3. the stainless steel formation plate that surpasses 2mm with thickness is as the scanning backing plate; The monolithic reconstituted tobacco is tiled in the spectrum of using each sample of specscan system scanning collection on the backing plate again; Whole probe contacts tightly during scanning with sample, avoids natural light to inject scanning head.
4. the spectrum of each sample is carried out smoothly handling with first derivation one by one, abate the noise and the influence of baseline wander.
The spectroscopic data of all samples that 5. 4. step is obtained and step 2. the thickness reference data that obtains of standard method are carried out corresponding one by one; Use PLS and carry out statistical fit to the spectroscopic data thickness measurement data corresponding with it, foundation obtains the quantitative model of thickness and deposits calculating in.
6. when setting up quantitative model; Reject these two parameters of spectrum influence value (Leverage) and measured value error (residual) and reject the exceptional value of spectrum and measured value; Number of principal components to model is optimized; Improve the correlativity of model, set up quantitative model more accurately, be stored in the computing machine.
Detect through calculating; The related coefficient of the above-mentioned model thickness of setting up is 0.9502; Has significant linear relationship between visible spectrum data and the sample thickness index; The near infrared spectrum of interpret sample includes and the closely-related information of thickness index, and the check and analysis of making the thickness index of near infrared spectrum are fully feasible.
In order to ensure accuracy and reliability that follow-up thickness detects, present embodiment has also carried out following checking to the quantitative model of being set up:
From modeling sample, choose 20 samples, use the model of setting up that sample is carried out scanner uni prediction checking, the checking result sees table 1.
Table 1 quantitative model is to the testing result of 17 inner sample
| Numbering | The quantitative model detected value | The standard method detected value | Absolute deviation |
| 1 | 0.256 | 0.251 | 0.005 |
| 2 | 0.250 | 0.246 | 0.004 |
| 3 | 0.252 | 0.255 | 0.003 |
| 4 | 0.244 | 0.240 | 0.004 |
| 5 | 0.216 | 0.224 | 0.008 |
| 6 | 0.239 | 0.235 | 0.004 |
| 7 | 0.247 | 0.249 | 0.002 |
| 8 | 0.247 | 0.250 | 0.003 |
| 9 | 0.236 | 0.243 | 0.007 |
| 10 | 0.262 | 0.251 | 0.011 |
| 11 | 0.221 | 0.217 | 0.004 |
| 12 | 0.231 | 0.231 | 0.000 |
| 13 | 0.226 | 0.226 | 0.000 |
| 14 | 0.225 | 0.227 | 0.002 |
| 15 | 0.222 | 0.224 | 0.002 |
| 16 | 0.225 | 0.219 | 0.006 |
| 17 | 0.248 | 0.253 | 0.005 |
See from table 1, the quantitative model absolute deviation average out to of being set up 0.004, adaptability is fine.
Table 2 is treated test sample thickness prediction value
| Numbering | The quantitative model detected value | The standard method detected value | Absolute deviation |
| 1 | 0.241 | 0.243 | 0.002 |
| 2 | 0.233 | 0.233 | 0.000 |
| 3 | 0.229 | 0.216 | 0.013 |
| 4 | 0.24 | 0.237 | 0.003 |
| 5 | 0.226 | 0.22 | 0.006 |
| 6 | 0.237 | 0.225 | 0.012 |
| 7 | 0.232 | 0.231 | 0.001 |
| 8 | 0.216 | 0.213 | 0.003 |
| 9 | 0.208 | 0.204 | 0.004 |
| 10 | 0.231 | 0.235 | 0.004 |
| 11 | 0.242 | 0.243 | 0.001 |
| 12 | 0.226 | 0.229 | 0.003 |
| 13 | 0.214 | 0.219 | 0.005 |
| 14 | 0.245 | 0.25 | 0.005 |
| 15 | 0.235 | 0.249 | 0.014 |
| 16 | 0.228 | 0.227 | 0.001 |
| 17 | 0.226 | 0.221 | 0.005 |
| 18 | 0.224 | 0.235 | 0.011 |
Can find out that from the deviation of table 2 quantitative model detected value and standard method detected value absolute deviation mean value is 0.005, prove and adopt the detection accuracy height of near infrared spectrum detection method of the present invention reconstituted tobacco thickness.
Embodiment 2
On production line, gather 5 in papermaking-method reconstituted tobaccos sample to be measured, call the model of setting up among the embodiment 1 and carry out the thickness index prediction, each sample prediction 5 times, the application standard method is measured thickness of sample simultaneously, and it measures result such as following table 3:
Table 3 production sample testing result testing result
Can be found out in production practices by table 3 and to use that repeatedly the measurement result standard deviation is less for its same sample, model prediction result and standard method detected value absolute deviation are all less than 0.005, and it is feasible that visible and near infrared spectrum detects the reconstituted tobacco product thickness.
All kinds of papermaking-method reconstituted tobaccos samples of each step of the present invention all can be obtained in producing the enterprise of papermaking-method reconstituted tobaccos, and the composition of sample, manufacturing process etc. are not had specific (special) requirements.
Claims (6)
1. utilize near infrared spectrum to detect the method for papermaking-method reconstituted tobaccos thickness, it is characterized in that, may further comprise the steps:
1. collect sample: collect and prepare the reconstituted tobacco sample that a collection of surface does not have obvious convexity and the visible hole of naked eyes; Under the temperature of standard conditions regulations, humidity, carrying out sample moisture regulates; Utilize standard method that collected sample is carried out Determination of thickness one by one, obtain quantitative reference data;
2. modeling sample screening: according to the quantitative reference data of standard method mensuration; Screening replenishes sample segment again; The reconstituted tobacco sample detection scope value data interval that the sample reference data the is covered state that is evenly distributed is with the accurate reliability of guaranteeing to detect after the modelling;
3. gather original spectrum: the sample that 2. step is obtained is tiled on the scanning backing plate one by one, and with the original spectrum of each sample of specscan system scanning collection, whole probe contacts tightly during scanning with sample, avoids natural light to inject scanning head;
4. spectrum pre-service: the original spectrum to collecting carries out the spectrum pre-service, and influence with baseline wander abates the noise;
5. set up quantitative model: the thickness reference data that 2. spectroscopic data that 4. step is obtained after the pre-service and step screen the modeling sample that obtains is carried out corresponding one by one, adopts PLS and cross-check to set up quantitative model;
6. optimize quantitative model: reject the exceptional value of spectrum and measured value in the quantitative model, the number of principal components of model is optimized, improve the correlativity of model, foundation is quantitative model more accurately, is stored in the computing machine;
2. papermaking-method reconstituted tobaccos thickness detecting method according to claim 1 is characterized in that, the reconstituted tobacco of described reconstituted tobacco for adopting the paper process explained hereafter to make.
3. the method for utilizing near infrared spectrum to detect papermaking-method reconstituted tobaccos thickness according to claim 1; It is characterized in that the 2. said standard method of step is meant reference to standard GB/T451.3 " determination method of paper and cal(l)iper " in Chinese tobacco industry recommended standard YC/T16.3-2003 " reconstituted tobacco third part: the paper process " test method; Said standard conditions are GB/T 16447 " atmospheric environment that tobacco and tobacco product are regulated and tested " defined terms.
4. the method for utilizing near infrared spectrum to detect papermaking-method reconstituted tobaccos thickness according to claim 1; It is characterized in that; Spectroscopic data with specscan system scanning collection sample is to adopt the reflection mode of passing through, and reflecting surface needs used thickness smooth above stainless steel and the smooth surface of 1mm.
5. the method for utilizing near infrared spectrum to detect papermaking-method reconstituted tobaccos thickness according to claim 1 is characterized in that, the said pre-service that spectrum is carried out is meant spectrum is carried out level and smooth and single order or second order differentiate pre-service.
6. the method for utilizing near infrared spectrum to detect papermaking-method reconstituted tobaccos thickness according to claim 1; It is characterized in that; The exceptional value of spectrum and measured value in the said rejecting quantitative model is meant and adopts spectrum influence value and two parameters of measured value error to reject the exceptional value of spectrum and measured value respectively.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102768031A (en) * | 2012-07-02 | 2012-11-07 | 云南烟草科学研究院 | Method for determining lamination thickness and single layer thickness of papermaking process reconstituted tobaccos |
| CN102798606A (en) * | 2012-08-08 | 2012-11-28 | 福建中烟工业有限责任公司 | Method for rapidly measuring preparation proportion of cigarette balsam to cigarette material liquid |
| CN103090802A (en) * | 2013-02-02 | 2013-05-08 | 中国农业科学院烟草研究所 | Method for detecting thickness of tobacco leaf |
| CN105661617A (en) * | 2016-01-05 | 2016-06-15 | 泉州装备制造研究所 | Coating uniformity online detection system and method for paper-making reconstituted tobacco |
| CN109164009A (en) * | 2018-11-13 | 2019-01-08 | 云南农业大学 | A kind of tobacco flue-curing real time on-line monitoring record system |
| CN113124784A (en) * | 2021-03-17 | 2021-07-16 | 红塔烟草(集团)有限责任公司 | Primary flue-cured tobacco part judgment method based on laser scanning confocal technology |
| CN114941992A (en) * | 2022-05-31 | 2022-08-26 | 浙江临安金洲纸业有限公司 | Flaw detection system of papermaking |
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| EP1826557A1 (en) * | 2006-02-27 | 2007-08-29 | Hauni Maschinenbau AG | Optical monitoring of products of the tobacco processing industry |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102768031A (en) * | 2012-07-02 | 2012-11-07 | 云南烟草科学研究院 | Method for determining lamination thickness and single layer thickness of papermaking process reconstituted tobaccos |
| CN102798606A (en) * | 2012-08-08 | 2012-11-28 | 福建中烟工业有限责任公司 | Method for rapidly measuring preparation proportion of cigarette balsam to cigarette material liquid |
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| CN105661617A (en) * | 2016-01-05 | 2016-06-15 | 泉州装备制造研究所 | Coating uniformity online detection system and method for paper-making reconstituted tobacco |
| CN105661617B (en) * | 2016-01-05 | 2017-06-16 | 泉州装备制造研究所 | A kind of papermaking-method reconstituted tobaccos coating homogeneity on-line detecting system and detection method |
| CN109164009A (en) * | 2018-11-13 | 2019-01-08 | 云南农业大学 | A kind of tobacco flue-curing real time on-line monitoring record system |
| CN113124784A (en) * | 2021-03-17 | 2021-07-16 | 红塔烟草(集团)有限责任公司 | Primary flue-cured tobacco part judgment method based on laser scanning confocal technology |
| CN113124784B (en) * | 2021-03-17 | 2022-08-05 | 红塔烟草(集团)有限责任公司 | Primary flue-cured tobacco part judgment method based on laser scanning confocal technology |
| CN114941992A (en) * | 2022-05-31 | 2022-08-26 | 浙江临安金洲纸业有限公司 | Flaw detection system of papermaking |
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