CN101393101A - Method for detecting tobacco surface density by near-infrared spectrum - Google Patents
Method for detecting tobacco surface density by near-infrared spectrum Download PDFInfo
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- CN101393101A CN101393101A CNA2008102306533A CN200810230653A CN101393101A CN 101393101 A CN101393101 A CN 101393101A CN A2008102306533 A CNA2008102306533 A CN A2008102306533A CN 200810230653 A CN200810230653 A CN 200810230653A CN 101393101 A CN101393101 A CN 101393101A
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Abstract
The invention relates to a method for determining the density of the leaf surface of a tobacco leaf by adoption of a near infrared spectrum, which is characterized in that the method comprises the following steps: a. the tobacco leaf of flue-cured tobacco or a redried strip is smoothly unfolded and arranged on the position of a check point of a near infrared instrument; b. a flaky pressure plate which does not absorb near infrared light energy is pressed on the unfolded tobacco leaf of the flue-cured tobacco or the unfolded redried strip; c. the near infrared spectrum of the tobacco leaf of the flue-cured tobacco or the refried strip is obtained through point sampling detection by the near infrared instrument; d. a corresponding mathematical model is established between the near infrared spectrum obtained and the determined result of the leaf area quality method, and a leaf surface density near infrared analysis model of the tobacco leaf of the flue-cured tobacco or the refried strip is formed; and e. the near infrared spectrum of the unknown tobacco leaf of the flue-cured tobacco or the unknown refried strip is analyzed by utilization of the leaf surface density near infrared analysis model, and the density value of the leaf surface of the sample can be obtained. The method is simple, convenient and easy, is labor and time saving, is suitable to be used on the spot, and can realize quick analysis of the density of the leaf surface of the tobacco leaf.
Description
Technical field
The present invention relates to a kind of assay method of tobacco surface density, more specifically saying so relates to a kind of method that adopts near-infrared spectrum technique to detect tobacco surface density.
Background technology
Tobacco surface density is an important indicator of tobacco leaf physical characteristics.The tobacco leaf physical characteristics influences quality of tobacco and cigarette processing technology, influences product style, cost and other economic targets of cigarette, is one of cigarette enterprise important content of raw tobacco material being carried out usability evaluation.Usually the assay method of tobacco surface density is leaf area mass method (mass method), card punch with known area is beaten the smoked sheet of getting certain area on open and flat tobacco leaf, place the aluminium box, put into 100 ± 2 ℃ of baking ovens after dry 2 hours, taking-up is put into drying basin and is cooled off, the weighing dry weight by mass area ratio, is tried to achieve the surface density of tobacco leaf.This method is more time-consuming, and is not suitable for the surface density mensuration of the less redrying piece cigarette of area, is difficult to satisfy the needs of modern enterprise express-analysis.
Near-infrared spectrum technique is a kind of efficiently modern analytical technique fast, have that sample production is simple, analysis time weak point, easy operating, to advantages such as sample are harmless, be widely used in fields such as agricultural, petrochemical complex, medicine, papermaking.At present near-infrared spectrum technique is being measured the existing report in aspects such as tobacco leaf chemical composition, tobacco leaf style, the place of production, but the detection that is used for tobacco surface density does not appear in the newspapers.
Summary of the invention
Purpose of the present invention just in the above-mentioned prior art during existing surface density check fee and surface density be difficult to detect weak point a kind of method that adopts near-infrared spectrum technique to detect tobacco surface density be provided.This method can be given full play to the advantage of near infrared express-analysis, thereby realizes the fast measuring to surface density.
Purpose of the present invention can realize by following technique measures:
Method of the present invention comprises the steps: a, cured tobacco leaf or the smooth expansion of redrying piece cigarette is placed on the nir instrument check point position; B, on cured tobacco leaf that launches or redrying piece cigarette, press a sheet pressing plate that does not absorb the near infrared light energy; C, utilize nir instrument to get a detection, obtain the near infrared spectrum of cured tobacco leaf or redrying piece cigarette; D, gained near infrared spectrum and leaf area mass method measurement result are set up corresponding mathematical model, the surface density near-infrared analysis model of formation cured tobacco leaf or redrying piece cigarette; E, utilize the near infrared spectrum of unknown cured tobacco leaf of surface density near-infrared analysis model analysis or redrying piece cigarette, can obtain the surface density value of sample.
Point sampling method described in the present invention is as follows: the cured tobacco leaf after the baking adopts 6 methods to get a little, and the redrying piece cigarette adopts one point method to get a detection.Described 6 methods are for being axis of symmetry with the master pulse, and 3 points are respectively got at mid point, 1/4 place, two ends on the center line of the parallel master pulse of both sides blade; Described one point method, this point is positioned at the center of blade.
Sheet pressing plate described in the present invention is be 450～650g, area greater than area, thickness on cured tobacco leaf that launches or the redrying piece cigarette by quality is that copper material about 1.0cm is made.
Method of the present invention has following beneficial effect compared to existing technology: method is simple for this, and laborsaving saving time is suitable for on-the-spot the use, can realize the express-analysis to tobacco surface density.
Description of drawings
Fig. 1 gets a position view (6 methods) near infrared detection of the present invention.
The surface density illustraton of model of Fig. 2 for adopting method of the present invention to set up.
Embodiment
The present invention is further described below with reference to embodiment, when not limiting and inventing.
Embodiment 1:
The drawout that cured tobacco leaf is smooth places on the check point position of near infrared spectrometer; To press one on the cured tobacco leaf that launches be 450～650g, area greater than the cured tobacco leaf area, the thickness that launch by quality is that copper material about 1.0cm is made the sheet pressing plate; Get a detection (cured tobacco leaf after the baking adopts 6 methods to get a little) by nir instrument, obtain the near infrared spectrum of tobacco leaf; Utilize the near infrared spectrum of the unknown cured tobacco leaf of surface density near-infrared analysis model analysis, can obtain the surface density value of sample.The mass method of using near infrared spectroscopic method mensuration tobacco surface density and prior art compares, and average relative error is 5.60%, sees table 1 for details.
Table 1 near infrared measured value and leaf area mass method measured value be (cured tobacco leaf after the baking) relatively
| Sample number into spectrum | Mass method g/m 2 | Near infrared method g/m 2 | Absolute error g/m 2 | Relative error % | Sample number into spectrum | Mass method g/m 2 | Near infrared method g/m 2 | Absolute error g/m 2 | Relative error % |
| ymd001 | 77.37 | 77.07 | 0.29 | 0.38 | ymd032 | 81.87 | 92.55 | -10.68 | 13.04 |
| ymd002 | 104.38 | 92.59 | 11.79 | 11.30 | ymd033 | 56.80 | 63.95 | -7.15 | 12.59 |
| ymd003 | 78.19 | 86.13 | -7.95 | 10.17 | ymd034 | 64.78 | 55.77 | 9.01 | 13.91 |
| ymd004 | 76.65 | 72.60 | 4.05 | 5.28 | ymd035 | 76.34 | 76.39 | -0.05 | 0.06 |
| ymd005 | 96.09 | 94.51 | 1.59 | 1.65 | ymd036 | 87.40 | 88.02 | -0.62 | 0.71 |
| ymd006 | 79.52 | 83.12 | -3.60 | 4.53 | ymd037 | 115.23 | 107.91 | 7.32 | 6.35 |
| ymd007 | 64.98 | 68.50 | -3.51 | 5.40 | ymd038 | 59.77 | 59.73 | 0.04 | 0.06 |
| ymd008 | 90.06 | 91.57 | -1.51 | 1.68 | ymd039 | 87.60 | 80.39 | 7.21 | 8.23 |
| ymd009 | 85.25 | 88.09 | -2.85 | 3.34 | ymd040 | 100.29 | 102.79 | -2.50 | 2.49 |
| ymd010 | 73.89 | 69.78 | 4.11 | 5.56 | ymd041 | 85.35 | 80.64 | 4.71 | 5.52 |
| ymd011 | 75.12 | 70.15 | 4.97 | 6.61 | ymd042 | 60.17 | 66.10 | -5.92 | 9.85 |
| ymd012 | 92.41 | 83.59 | 8.82 | 9.54 | ymd043 | 95.28 | 101.56 | -6.28 | 6.59 |
| ymd013 | 69.59 | 69.41 | 0.18 | 0.26 | ymd044 | 111.85 | 98.81 | 13.05 | 11.66 |
| ymd014 | 75.52 | 77.98 | -2.46 | 3.25 | ymd045 | 69.38 | 73.19 | -3.80 | 5.48 |
| ymd015 | 82.18 | 77.10 | 5.08 | 6.18 | ymd046 | 85.86 | 76.58 | 9.28 | 10.81 |
| ymd016 | 94.46 | 94.57 | -0.12 | 0.12 | ymd047 | 80.64 | 81.37 | -0.73 | 0.90 |
| ymd017 | 99.47 | 97.65 | 1.82 | 1.83 | ymd048 | 86.88 | 83.84 | 3.04 | 3.50 |
| ymd018 | 77.98 | 85.96 | -7.98 | 10.24 | ymd049 | 86.58 | 85.79 | 0.79 | 0.91 |
| ymd019 | 74.60 | 80.51 | -5.91 | 7.92 | ymd050 | 91.28 | 90.63 | 0.65 | 0.71 |
| ymd020 | 62.32 | 66.81 | -4.48 | 7.20 | ymd051 | 101.62 | 95.81 | 5.81 | 5.72 |
| ymd021 | 96.50 | 86.83 | 9.67 | 10.02 | ymd052 | 83.81 | 74.34 | 9.47 | 11.30 |
| ymd022 | 89.65 | 97.30 | -7.65 | 8.54 | ymd053 | 58.95 | 65.03 | -6.08 | 10.32 |
| ymd023 | 95.07 | 90.69 | 4.38 | 4.60 | ymd054 | 69.28 | 76.31 | -7.03 | 10.14 |
| ymd024 | 72.15 | 64.29 | 7.86 | 10.89 | ymd055 | 58.74 | 66.65 | -7.91 | 13.47 |
| ymd025 | 61.71 | 66.46 | -4.75 | 7.70 | ymd056 | 55.47 | 55.28 | 0.19 | 0.33 |
| ymd026 | 95.48 | 96.52 | -1.04 | 1.09 | ymd057 | 89.44 | 85.05 | 4.39 | 4.91 |
| ymd027 | 88.62 | 86.47 | 2.16 | 2.43 | ymd058 | 63.65 | 63.51 | 0.15 | 0.23 |
| ymd028 | 87.91 | 87.76 | 0.15 | 0.17 | ymd059 | 140.82 | 124.94 | 15.88 | 11.28 |
| ymd029 | 75.32 | 68.96 | 6.37 | 8.45 | ymd060 | 71.53 | 72.06 | -0.53 | 0.74 |
| ymd030 | 113.08 | 109.48 | 3.60 | 3.18 | ymd061 | 83.40 | 82.89 | 0.51 | 0.62 |
| ymd031 | 76.55 | 80.51 | -3.96 | 5.17 | ymd062 | 80.03 | 80.24 | -0.21 | 0.26 |
Embodiment 2:
The drawout that the redrying piece cigarette is smooth places on the check point position of near infrared spectrometer; Press on the redrying piece cigarette that launches one by quality be 450～650g, area greater than the redrying piece cigarette that launches on area, thickness be that copper material about 1.0cm is made the sheet pressing plate; Get a detection (the redrying piece cigarette adopts one point method to get a detection) by nir instrument, obtain the near infrared spectrum of redrying piece cigarette; Utilize the near infrared spectrum of the unknown redrying piece cigarette of surface density near-infrared analysis model analysis, can obtain the surface density value of sample.The mass method of using near infrared spectroscopic method mensuration redrying piece tobacco leaf surface density and prior art compares, and average relative error is 6.20%, sees table 2 for details.
Table 2 near infrared measured value and leaf area mass method measured value be (redrying piece cigarette) relatively
| Sample number into spectrum | Mass method g/m 2 | Near infrared method g/m 2 | Absolute error g/m 2 | Relative error % | Sample number into spectrum | Mass method g/m 2 | Near infrared method g/m 2 | Absolute error g/m 2 | Relative error % |
| pmd001 | 101.11 | 99.99 | 1.12 | 1.11 | pmd026 | 61.20 | 68.97 | -7.77 | 12.69 |
| pmd002 | 83.92 | 74.24 | 9.68 | 11.53 | pmd027 | 59.66 | 64.77 | -5.10 | 8.55 |
| pmd003 | 102.34 | 97.77 | 4.57 | 4.46 | pmd028 | 80.33 | 91.55 | -11.21 | 13.96 |
| pmd004 | 90.16 | 86.78 | 3.38 | 3.75 | pmd029 | 62.84 | 60.52 | 2.32 | 3.69 |
| pmd005 | 67.54 | 66.76 | 0.78 | 1.15 | pmd030 | 97.02 | 109.85 | -12.83 | 13.23 |
| pmd006 | 62.12 | 68.69 | -6.57 | 10.57 | pmd031 | 81.46 | 80.28 | 1.18 | 1.45 |
| pmd007 | 87.29 | 88.60 | -1.30 | 1.49 | pmd032 | 77.37 | 66.15 | 11.21 | 14.49 |
| pmd008 | 78.49 | 84.67 | -6.17 | 7.86 | pmd033 | 66.01 | 62.38 | 3.63 | 5.50 |
| pmd009 | 119.02 | 101.65 | 17.37 | 14.59 | pmd034 | 86.99 | 82.42 | 4.57 | 5.25 |
| pmd010 | 94.05 | 88.95 | 5.10 | 5.42 | pmd035 | 94.76 | 93.84 | 0.93 | 0.98 |
| pmd011 | 62.12 | 61.81 | 0.31 | 0.49 | pmd036 | 80.23 | 72.35 | 7.89 | 9.83 |
| pmd012 | 95.99 | 90.19 | 5.80 | 6.05 | pmd037 | 42.47 | 43.75 | -1.28 | 3.01 |
| pmd013 | 92.10 | 103.73 | -11.63 | 12.62 | pmd038 | 66.72 | 66.49 | 0.24 | 0.36 |
| pmd014 | 70.41 | 70.54 | -0.13 | 0.19 | pmd039 | 72.66 | 75.74 | -3.08 | 4.24 |
| pmd015 | 70.41 | 68.89 | 1.52 | 2.16 | pmd040 | 79.00 | 70.78 | 8.22 | 10.41 |
| pmd016 | 96.61 | 96.09 | 0.52 | 0.54 | pmd041 | 58.74 | 58.23 | 0.51 | 0.87 |
| pmd017 | 97.02 | 83.47 | 13.54 | 13.96 | pmd042 | 51.37 | 57.81 | -6.44 | 12.54 |
| pmd018 | 63.45 | 68.39 | -4.94 | 7.78 | pmd043 | 67.65 | 57.33 | 10.31 | 15.25 |
| pmd019 | 97.63 | 94.01 | 3.62 | 3.71 | pmd044 | 72.15 | 77.04 | -4.89 | 6.78 |
| pmd020 | 52.29 | 56.07 | -3.77 | 7.21 | pmd045 | 52.19 | 55.08 | -2.88 | 5.52 |
| pmd021 | 63.04 | 68.45 | -5.41 | 8.58 | pmd046 | 57.10 | 56.03 | 1.07 | 1.88 |
| pmd022 | 56.69 | 56.59 | 0.11 | 0.19 | pmd047 | 81.15 | 78.90 | 2.26 | 2.78 |
| pmd023 | 110.32 | 100.98 | 9.34 | 8.47 | pmd048 | 107.86 | 104.23 | 3.63 | 3.37 |
| pmd024 | 91.59 | 88.65 | 2.94 | 3.21 | pmd049 | 84.33 | 87.74 | -3.42 | 4.05 |
| pmd025 | 69.69 | 68.64 | 1.05 | 1.51 | pmd050 | 63.96 | 70.66 | -6.70 | 10.47 |
Claims (4)
1, a kind of method that adopts the near infrared ray tobacco surface density is characterized in that: this method comprises the steps: a, cured tobacco leaf or the smooth expansion of redrying piece cigarette is placed on the nir instrument check point position; B, on cured tobacco leaf that launches or redrying piece cigarette, press a sheet pressing plate that does not absorb the near infrared light energy; C, utilize nir instrument to get a detection, obtain the near infrared spectrum of cured tobacco leaf or redrying piece cigarette; D, gained near infrared spectrum and leaf area mass method measurement result are set up corresponding mathematical model, the surface density near-infrared analysis model of formation cured tobacco leaf or redrying piece cigarette; E, utilize the near infrared spectrum of unknown cured tobacco leaf of surface density near-infrared analysis model analysis or redrying piece cigarette, can obtain the surface density value of sample.
2, method according to claim 1 is characterized in that: the described point sampling method of getting a detection is as follows: cured tobacco leaf adopts 6 methods to get a little, and the redrying piece cigarette adopts one point method to get a detection.
3, method according to claim 2 is characterized in that: described 6 methods are for being axis of symmetry with the master pulse, and 3 points are respectively got at mid point, 1/4 place, two ends on the center line of the parallel master pulse of both sides blade; Described one point method, this point is positioned at the center of redrying piece cigarette.
4, method according to claim 1 is characterized in that: described sheet pressing plate is be 450～650g, area greater than area, thickness on cured tobacco leaf that launches or the redrying piece cigarette by quality is that copper material about 1.0cm is made.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103175835A (en) * | 2013-02-26 | 2013-06-26 | 上海烟草集团有限责任公司 | Method for determining area quality of tobacco leaves based on intelligent image processing and model estimation |
| CN103245620A (en) * | 2013-05-24 | 2013-08-14 | 贵州省烟草科学研究院 | Method for detecting yellowing degree of flue-cured tobacco leaves during curing process |
| CN103712590A (en) * | 2013-12-30 | 2014-04-09 | 中国农业科学院烟草研究所 | Low-difference detection method for thickness of tobacco leaves |
| CN103760166A (en) * | 2014-01-14 | 2014-04-30 | 河南科技大学 | Flue-cured tobacco appearance information collecting device |
| CN104596982A (en) * | 2015-01-30 | 2015-05-06 | 云南中烟工业有限责任公司 | Method for measuring pectin of paper-making reconstituted tobacco by near-infrared diffuse reflection spectrum technology |
| CN105815806A (en) * | 2016-06-01 | 2016-08-03 | 江苏中烟工业有限责任公司 | Measuring method for ration of paper-making reconstituted tobacco product |
| CN112362522A (en) * | 2020-10-23 | 2021-02-12 | 浙江中烟工业有限责任公司 | Tobacco leaf volume weight measuring method based on reinforcement learning |
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- 2008-10-30 CN CNA2008102306533A patent/CN101393101A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175835A (en) * | 2013-02-26 | 2013-06-26 | 上海烟草集团有限责任公司 | Method for determining area quality of tobacco leaves based on intelligent image processing and model estimation |
| CN103175835B (en) * | 2013-02-26 | 2015-04-08 | 上海烟草集团有限责任公司 | Method for determining area quality of tobacco leaves based on intelligent image processing and model estimation |
| CN103245620A (en) * | 2013-05-24 | 2013-08-14 | 贵州省烟草科学研究院 | Method for detecting yellowing degree of flue-cured tobacco leaves during curing process |
| CN103712590A (en) * | 2013-12-30 | 2014-04-09 | 中国农业科学院烟草研究所 | Low-difference detection method for thickness of tobacco leaves |
| CN103760166A (en) * | 2014-01-14 | 2014-04-30 | 河南科技大学 | Flue-cured tobacco appearance information collecting device |
| CN104596982A (en) * | 2015-01-30 | 2015-05-06 | 云南中烟工业有限责任公司 | Method for measuring pectin of paper-making reconstituted tobacco by near-infrared diffuse reflection spectrum technology |
| CN105815806A (en) * | 2016-06-01 | 2016-08-03 | 江苏中烟工业有限责任公司 | Measuring method for ration of paper-making reconstituted tobacco product |
| CN112362522A (en) * | 2020-10-23 | 2021-02-12 | 浙江中烟工业有限责任公司 | Tobacco leaf volume weight measuring method based on reinforcement learning |
| CN112362522B (en) * | 2020-10-23 | 2022-08-02 | 浙江中烟工业有限责任公司 | Tobacco leaf volume weight measuring method based on reinforcement learning |
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