CN104122258B - A kind of method analyzing tobacco leaf chopping uniformity - Google Patents

Abstract

The invention discloses a kind of method analyzing tobacco leaf chopping uniformity, including: 1) randomly draw 1 tobacco sample and multiple tobacco sample, fixing rear digital camera shooting, it is thus achieved that analyze and use pretreatment picture；2) utilize image processing method, be digitized respectively processing to the picture of control sample and tobacco sample, it is thus achieved that the sample area pixel value of each control sample, and the sample area pixel value of tobacco sample and sample length pixel value；3) formula is used to calculate the tobacco cut width of a tobacco sample；4) on the basis of the tobacco cut width obtaining tobacco sample, formula is used to calculate tobacco leaf chopping uniformity.The difficult problem solving current cigarette enterprise Accurate Determining shredding uniformity of the present invention, a kind of simple and feasible assay method is provided for accurate, objective, succinct, efficient evaluations tobacco cut width, and provide reliable technical parameter and evaluating data, the most significant for controlling stability of the production process, tobacco cut width uniformity and cigarette quality index.

Description

A kind of method analyzing tobacco leaf chopping uniformity

Technical field

The invention belongs to cigarette product quality monitoring technology field, be specifically related to a kind of side analyzing tobacco leaf chopping uniformity Method.

Background technology

During production of cigarettes, it is possible to monitor uniformity and the stability of product accurately and in time, produce improving Medicated cigarette Quality important in inhibiting.At present, the end product of Medicated cigarette can only be detected by domestic most of cigarette enterprise, for Process control precision lacks monitoring and measuring means accurately.Therefore, throwing manufacturing procedure is become more meticulous research by tobacco business Just seem particularly deeply concerned.Shredding operation is as the important procedure of Cigarette processing, and its index directly concerned is the shredding width of Nicotiana tabacum L. Degree.Tobacco cut width is one of principal element affecting cigarette product aesthetic quality and physical quality, its uniformly, whether stablize and associate The organoleptic quality of cigarette product and the stability of fume indication.Correlational study shows: the instability of tobacco cut width, can cause volume The variation of cigarette smoke components in combustion, affects odor characteristic and the taste characteristics of Medicated cigarette, even results in Medicated cigarette style special The drift levied.Suitably tobacco cut width, is conducive to the raising cigarette flavor property sent out thoroughly, increase flue gas sophistication, increase process to make broken Rate and finished product are containing end rate.Become additionally, the change of tobacco cut width can affect the chemistry such as the aminoacid in flue gas, nicotine, CO and phenol The burst size divided.Therefore, production process must control well the uniformity of tobacco cut width.

At present, have some to report the assay method of tobacco cut width, in industry use tobacco shred projectors (JTY250-1 or Person EP-1profile projectors) measure tobacco shred width, the method is first when sampling, and surveyed tobacco shred is under-represented, Select is all the tobacco shred of both sides shredding comparison rule, the number of the only a certain section of both sides relative parallel positions of tobacco shred of reading According to, for curling, jagged tobacco shred helpless.When additionally using the method measurement tobacco shred width, take time and effort, different Testing staff has different operating habits, causes personal error bigger.Patent (201210324973.1) discloses a kind of shredding Width measurements method, uses matlab image processing method to be digitized pretreatment picture processing, extracts binary image, Calculate tobacco cut width.But this patent does not suggests that the characterizing method of shredding uniformity.

Summary of the invention

Goal of the invention: for the deficiencies in the prior art, it is an object of the invention to provide a kind of analysis tobacco leaf chopping The method of uniformity, the method shooting control sample and the image of tobacco sample, take photoshop software to extract the picture of sample Element value, with control sample as standard, the tobacco cut width of some tobacco sample is tried to achieve in conversion, according to the change of tobacco cut width, Statistical analysis draws shredding uniformity.

Technical scheme: in order to realize foregoing invention purpose, the technical solution used in the present invention is as follows:

A kind of method analyzing tobacco leaf chopping uniformity, comprises the steps:

1) in cigarette primary processing shredding operation, after equipment to be processed is steady, before filament cutter, 1 tobacco sample is randomly drawed, Its extravagance is opened, cuts square pieces, as control sample；After filament cutter, randomly draw multiple tobacco shred sample every 1min simultaneously Product, by control sample with each tobacco sample according to nonoverlapping principle, are separately fixed on background template, suitable at illumination condition In the case of digital camera shooting, it is thus achieved that analyze use pretreatment picture；

2) utilize image processing method, be digitized respectively processing to the picture of control sample with tobacco sample, it is thus achieved that The sample area pixel value of each control sample, and the sample area pixel value of tobacco sample and sample length pixel value；

3) tobacco cut width of use following equation calculating tobacco sample:

$W_i=\frac{S_i}{L_i\×\sqrt{P_0/S_0}}$

In above formula, W_iTobacco cut width for tobacco sample；S_iSample area pixel value for tobacco sample；L_iFor tobacco shred sample The sample length pixel value of product；P₀Sample area pixel value for control sample；S₀The real area of control sample；

4) on the basis of the tobacco cut width obtaining tobacco sample, following equation is used to calculate tobacco leaf chopping uniformity:

$\mathrm{CU}=(1-\frac{\sqrt{\frac{1}{n-1}\underset{i=n}{\overset{n}{\mathrm{\Σ}}}{(W_i-\stackrel{\‾}{W})}^2}}{\stackrel{\‾}{W}})\×100\%$

In above formula, CU is shredding uniformity；N is tobacco sample number, is i.e. 30；W_iFor the tobacco shred sample obtained in upper step The tobacco cut width of product；Average tobacco cut width for tobacco sample.

Step 1) in, described square pieces is the rectangular-shaped pieces of 15mm × 10mm.

Step 1) in, in described tobacco sample, each sample does not has adhesion and length to reach more than 15mm.

Step 2) in, the image processing tool used is photoshop software, sets pixel length-width ratio as square, then Utilize evil spirit rod or Magnetic Lasso function synthesized to choose the tobacco shred in image, thus obtain the pixel value of image.

Beneficial effect: compared with prior art, the present invention solves current cigarette enterprise Accurate Determining shredding uniformity A difficult problem, provide a kind of simple and feasible assay method for accurate, objective, succinct, efficient evaluations tobacco cut width, and provide can The technical parameter leaned on and evaluating data, for controlling stability of the production process, tobacco cut width uniformity and cigarette quality index all Significant.

Accompanying drawing explanation

Fig. 1 is analysis pretreatment figure.

Detailed description of the invention

Below in conjunction with specific embodiment, the present invention is described further.

Embodiment 1

With a specification cigarette primary processing processing shredding operation as sample point, its design tobacco cut width is 1.0mm.Then carry out as Lower process:

(1), after equipment to be processed is steady, before filament cutter, 1 tobacco sample is extracted, simultaneously every 1min after filament cutter Left and right 30 tobacco sample of extraction immediately.From tobacco sample, extract a piece of Nicotiana tabacum L., its extravagance is opened, cuts 15.4mm with shears The rectangular-shaped pieces of about × 9.5mm, is considered as control sample；Meanwhile, from 30 tobacco sample, respectively pick out and do not have adhesion also And length reaches the tobacco shred of more than 15mm, totally 30.By control sample and 30 tobacco shreds according to nonoverlapping principle, use respectively Solid gum is open and flat to be pasted on background template.

(2) it is placed horizontally at pasting the control sample background template with tobacco shred on shooting operating board, at illumination condition Uniform environment opens four corner lamp sources, uses digital camera adjusting focal length, close flash lamp, just go up at described shooting operating board Fang Jinhang vertically takes pictures, it is thus achieved that analyzing and use pretreatment picture, result is shown in Fig. 1.

(3) utilize photoshop image processing method, the picture of control sample with tobacco sample is digitized respectively Process, sets pixel length-width ratio as square, utilize evil spirit excellent or Magnetic Lasso function synthesized chooses the tobacco shred in image, it is thus achieved that be each right The sample area pixel value of product is that 55001 (control sample real area is 146.3mm in the same old way²), and the sample of tobacco sample Area pixel value and sample length pixel value, use following equation to calculate the tobacco cut width of tobacco sample:

$W_i=\frac{S_i}{L_i\×\sqrt{P_0/S_0}}$

In above formula, W_iTobacco cut width for tobacco sample；S_iSample area pixel value for tobacco sample；L_iFor tobacco shred sample The sample length pixel value of product；P₀Sample area pixel value for control sample；S₀The real area of control sample.Result such as table 1 Shown in.

The sample area pixel value of table 1 tobacco sample and sample length pixel value

Sample sequence number	Sample area pixel value	Sample length pixel value	The tobacco cut width (mm) of sample
				1	9287	462	1.0367
2	11262	483	1.2026
				3	8619	392	1.1340

4	10924	508	1.1091
				5	10028	455	1.1367
6	11973	513	1.2037
				7	10574	464	1.1753
8	10252	561	0.9425
				9	11544	650	0.9160
10	10027	486	1.0641
				11	9466	450	1.0849
12	7793	432	0.9304
				13	10541	477	1.1397
14	4944	252	1.0118
				15	10404	440	1.2195
16	4690	236	1.0249
				17	10298	452	1.1750
18	6280	392	0.8262
				19	9189	378	1.2538
20	6355	290	1.1302
				21	6704	316	1.0942
22	10100	462	1.1275
				23	8968	452	1.0233
24	11869	467	1.3108
				25	7856	377	1.0747
26	9137	411	1.1466
				27	8214	419	1.0111
28	5528	260	1.0966
				29	8997	401	1.1572
30	9831	493	1.0285

(4) with the tobacco shred width result in table 1 as foundation, following equation is used to calculate tobacco leaf chopping uniformity:

$\mathrm{CU}=(1-\frac{\sqrt{\frac{1}{n-1}\underset{i=n}{\overset{n}{\mathrm{\Σ}}}{(W_i-\stackrel{\‾}{W})}^2}}{\stackrel{\‾}{W}})\×100\%$

In above formula, CU is shredding uniformity；N is tobacco sample number, is i.e. 30；W_iFor the tobacco shred sample obtained in upper step The tobacco cut width of product；Average tobacco cut width for tobacco sample.The wherein meansigma methods of tobacco shred widthFor 1.0929mm, shredding Uniformity CU is 90.30%.

Embodiment 2

With another specification cigarette primary processing processing shredding operation as sample point, its design tobacco cut width is 0.9mm.Then according to Method in embodiment 1 processes, and control sample area pixel value is 55001, control sample real area 146.3mm², As shown in table 2 to the tobacco cut width of each tobacco sample.By tobacco sample tobacco cut width in table, calculate the flat of tobacco shred width AverageFor 0.9446mm, shredding uniformity CU is 89.44%.

The sample area pixel value of table 2 tobacco sample and sample length pixel value

Sample sequence number	Sample area pixel value	Sample length pixel value	The tobacco cut width (mm) of sample
				1	8503	484	0.9061
2	8884	478	0.9588
				3	8556	473	0.9337
4	6685	466	0.7391
				5	8013	444	0.9309
6	8971	488	0.9480
				7	7072	393	0.9280
8	6530	445	0.7575
				9	7890	449	0.9064
10	5463	368	0.7655
				11	7164	432	0.8552
12	8681	455	0.9842
				13	5453	355	0.7920
14	9044	439	1.0632

15	7863	440	0.9212
				16	8055	491	0.8460
17	7839	411	0.9829
				18	7836	395	1.0225
19	7076	339	1.0777
				20	7965	420	0.9780
21	7971	469	0.8759
				22	7300	403	0.9352
23	7163	334	1.1066
				24	9257	451	1.0594
25	8133	410	1.0233
				26	9521	435	1.1289
27	7599	415	0.9450
				28	8390	450	0.9624
29	8264	434	0.9817
				30	7257	366	1.0221

Claims (4)

1. the method analyzing tobacco leaf chopping uniformity, it is characterised in that comprise the steps:

1) in cigarette primary processing shredding operation, after equipment to be processed is steady, before filament cutter, 1 tobacco sample is randomly drawed, by it Extravagance is opened, and cuts square pieces, as control sample；After filament cutter, randomly draw multiple tobacco sample every 1min simultaneously, By control sample with each tobacco sample according to nonoverlapping principle, it is separately fixed on background template, in the suitable feelings of illumination condition Digital camera shooting under condition, it is thus achieved that analyze and use pretreatment picture；

2) utilize image processing method, be digitized respectively processing to the picture of control sample with tobacco sample, it is thus achieved that each right The sample area pixel value of the sample area pixel value of product, and tobacco sample in the same old way and sample length pixel value；

3) tobacco cut width of each tobacco sample of use following equation calculating:

In above formula, W_iTobacco cut width for tobacco sample；S_iSample area pixel value for tobacco sample；L_iFor tobacco sample Sample length pixel value；P₀Sample area pixel value for control sample；S₀The real area of control sample；

4) on the basis of the tobacco cut width obtaining tobacco sample, following equation is used to calculate tobacco leaf chopping uniformity:

In above formula, CU is shredding uniformity；N is tobacco sample number, is i.e. 30；W_iFor the tobacco sample that obtains in upper step Tobacco cut width；Average tobacco cut width for tobacco sample.

The method of analysis tobacco leaf chopping uniformity the most according to claim 1, it is characterised in that: step 1) in, described Square pieces is the rectangular-shaped pieces of 15mm × 10mm.

The method of analysis tobacco leaf chopping uniformity the most according to claim 1, it is characterised in that: step 1) in, described In tobacco sample, each sample does not has adhesion and length to reach more than 15mm.

The method of analysis tobacco leaf chopping uniformity the most according to claim 1, it is characterised in that: step 2) in, used Image processing tool be photoshop software, set pixel length-width ratio as square, recycling evil spirit rod or Magnetic Lasso function are combined Close and choose the tobacco shred in image, thus obtain the pixel value of image.