CN102095396A - Method for measuring single-layer thickness and laminated thickness of tobacco leaves - Google Patents

Abstract

The invention relates to a method for measuring the single-layer thickness and the laminated thickness of tobacco leaves, which belongs to the filed of measuring of the physical indexes of tobacco leaves. The method for measuring the single-layer thickness and the laminated thickness of tobacco leaves comprises the steps of: a. preparing a sample; b. calibrating and adjusting instruments; c. measuring the thicknesses; and d. calculating the measuring results of the single-layer thickness and the laminated thickness, wherein the result iscurate as to 0.001mm. The method has the advantages of safety, simplicity, convenience and accuracy, and the measured single-layer thickness and laminated thickness indexes of the tobacco leaves can represent the identity characteristics of the tobacco leaves.

Description

A kind of method of measuring tobacco leaf thickness in monolayer and lamination thickness

Technical field:

The present invention relates to a kind of method of measuring tobacco leaf thickness in monolayer and lamination thickness, belong to the tobacco leaf physical index and measure the field.

Background technology:

Tobacco leaf thickness is meant cured tobacco leaf bearing certain pressure between two measurement faces, thereby measures the distance between cured tobacco leaf two surfaces, and its result represents with millimeter.

The tobacco leaf thickness in monolayer is meant the individual layer sample is applied static load, thereby measures the thickness of tobacco leaf.

Tobacco leaf lamination thickness is meant the multilayer sample applied static load, thereby measures the thickness of multilayer tobacco leaf, calculates the thickness of individual layer tobacco leaf again.

The vane thickness of tobacco leaf is the important physical proterties of tobacco leaf, reflected to a certain extent tobacco leaf development condition, maturity, beat leaf quality, quality of tobacco.Blade is thin excessively, and the tobacco leaf internal substance is not abundant, and output and quality are all lower; Blade is blocked up, and tobacco tissue is coarse, and nitrogen-containing compounds such as nicotine are too high, and the jealous change of fragrance is bad.In some countries, tobacco leaf thickness is used as the grouping factor of flue-cured tobacco classification, in U.S.'s flue-cured tobacco somatotype in addition adopt tobacco leaf thickness describe as the key distinction of 11 hypotypes it.The thickness of flue-cured tobacco blade and kind, ecological condition and cultivation step have confidential relation, and after variety regionalization plantation and stable cultivation step formed, the difference in thickness of flue-cured tobacco blade depended primarily on regional ecocline.The physical behavior of tobacco leaf and the vane thickness of tobacco leaf are closely related, and the physical behavior of systematic study tobacco leaf is understood the regularity of distribution of tobacco leaf thickness preferably, for cigarette industry is rationally selected raw tobacco material for use and the PROCESS FOR TREATMENT that suits provides foundation.

At present, my solid tobacco thickness all is to represent with thickness in monolayer, mainly contains on the tobacco leaf thickness measuring method instrument: vernier caliper, clock gauge, thickness gauge.On the assay method mainly be adopt point at a slice tobacco leaf, in, measure respectively on the base, calculate mean value then.These method errors are bigger, can accurately not characterize the actual thickness of tobacco leaf.By literature search, do not see the open report identical with the present invention.

Summary of the invention:

The object of the present invention is to provide a kind of safe, easy, accurate, measure the method for tobacco leaf thickness in monolayer and lamination thickness accurately, characterize the tobacco leaf identity properties by these indexs.

The concrete steps of the method for the thickness in monolayer of mensuration tobacco leaf of the present invention and lamination thickness are as follows:

(1) preparation of sample

Tobacco sample 22 ℃ of temperature, is prepared sample behind the balance 48h in the climatic chamber of humidity 60%;

The tobacco sample that thickness in monolayer is measured: get 10 tobacco leaves, card punch with diameter 20mm, every tobacco leaf is each side being made a call to 3 holes uniformly along master pulse, every tobacco leaf is made a call to 6 holes altogether, and master pulse and offshoot are avoided in each disk all do not have eye or breakage, every tobacco leaf is made a call to 6 holes altogether, 10 tobacco leaves amount to 60 disks, and every tobacco leaf is a repetition, amount to 10 repetitions;

The tobacco sample of lamination Determination of thickness: get 10 tobacco leaves, get 10 tobacco leaves, with the card punch of diameter 20mm, every tobacco leaf is each side being made a call to 3 holes uniformly along master pulse, every tobacco leaf is made a call to 6 holes altogether, each disk all do not have eye or breakage, avoid master pulse and offshoot, 3 disks of the right and left all face up stacked respectively, measure stacked disk one-tenth-value thickness 1/10 with thickness gauge, every tobacco leaf is a repetition, totally 10 repetitions;

(2) calibration of instrument and adjusting

Open thickness gauge,, thickness gauge is placed on the shockproof table top of level in 22 ℃ of temperature, 60% time test of humidity, the workplace cleaning is clean, and the driving lever of leaving behind makes measuring head contact with the iron platform, check the zero point of thickness gauge display, if display is non-vanishing, then zeroing;

(3) Determination of thickness

Test under the atmospheric conditions under 22 ℃ of temperature, the humidity 60%, lift measuring head, insert the tobacco leaf disk at measuring head and iron interstation, control speed gently, the measuring head that fell writes down one-tenth-value thickness 1/10 to disk surfaces after 2 minutes, is accurate to 0.001mm.All the other tobacco leaves of replication during the continuous-reading of 2 or a plurality of samples, should guarantee that worktable is in dustless state;

(4) the thickness in monolayer measurement result is calculated thickness in monolayer with the arithmetic mean value representation of 10 measurement results by formula (1), and result of calculation is accurate to 0.001mm;

$S=\underset{i=1}{\overset{10}{\mathrm{\Σ}}}\mathrm{Si}/10---\left(1\right)$

In the formula: S---thickness in monolayer, mm;

Lamination thickness measurement result calculates lamination thickness with the arithmetic mean value representation of 10 measurement results by formula (2), and result of calculation is accurate to 0.001mm;

$B=\underset{i=1}{\overset{10}{\mathrm{\Σ}}}\mathrm{Bi}/10---\left(2\right)$

In the formula: B---lamination thickness, mm.

Method tool safety of the present invention, easy, accurate, accurate advantage, the tobacco leaf thickness in monolayer of mensuration and lamination thickness index can characterize the tobacco leaf identity properties.

Embodiment:

The concrete steps that the method for the thickness in monolayer of mensuration tobacco leaf of the present invention and lamination thickness is partly described by summary of the invention are carried out.

1. experimental cultivar is K326, and the position is a middle leaf, and grade is C3F, gets 20 on representative tobacco leaf, measures the tobacco leaf thickness in monolayer for 10, measures tobacco leaf lamination thickness, totally 2 different processing for other 10.Sample list such as table 1.

2. test apparatus: diameter is card punch, the thickness gauge (German KARL) of 20mm.

Table 1 analytic sample table

3. the result of thickness in monolayer determination method

The left side with tobacco leaf is an example, as seen from Table 2, measure 10 tobacco leaves with the thickness in monolayer method, respectively in the left side of every tobacco leaf blade tip, leaf, phyllopodium position finding thickness, it can be seen from the table can be, be the different tobacco leaves of a sample equally, the coefficient of variation between the thickness of Ce Dinging is bigger in this way.

The detection of table 2 tobacco sample thickness and statistic are described (thickness in monolayer)

4. the result of lamination thickness measurement method

As seen from Table 3, measure 10 tobacco leaves with lamination thickness method, in the blade tip on the left side of every tobacco leaf, the right, the leaf, the disk of phyllopodium mensuration thickness stacked together respectively, then the threeply degree is averaged, it can be seen from the table can be, be the different tobacco leaves of a sample equally, the coefficient of variation between the thickness of Ce Dinging is less in this way.

The detection of table 3 tobacco sample thickness and statistic (lamination thickness)

From result's (table 2 and 3), find out, lamination thickness method stability is significantly better than the thickness in monolayer method, measure the thickness of tobacco leaf with lamination thickness method, improve the accuracy of the physical thickness index of statement tobacco leaf, can represent the feature of a tobacco leaf sample more, so lamination thickness method had both improved data stability, had improved testing efficient again.

Claims (1)

1. method of measuring the thickness in monolayer and the lamination thickness of tobacco leaf, the concrete steps that it is characterized in that measuring the thickness in monolayer of tobacco leaf and lamination thickness are as follows:

(1) preparation of sample

Tobacco sample 22 ℃ of temperature, is prepared sample behind the balance 48h in the climatic chamber of humidity 60%;

The tobacco sample that thickness in monolayer is measured: get 10 tobacco leaves, card punch with diameter 20mm, every tobacco leaf is each side being made a call to 3 holes uniformly along master pulse, every tobacco leaf is made a call to 6 holes altogether, and master pulse and offshoot are avoided in each disk all do not have eye or breakage, every tobacco leaf is made a call to 6 holes altogether, 10 tobacco leaves amount to 60 disks, and every tobacco leaf is a repetition, amount to 10 repetitions;

The tobacco sample of lamination Determination of thickness: get 10 tobacco leaves, get 10 tobacco leaves, with the card punch of diameter 20mm, every tobacco leaf is each side being made a call to 3 holes uniformly along master pulse, every tobacco leaf is made a call to 6 holes altogether, each disk all do not have eye or breakage, avoid master pulse and offshoot, 3 disks of the right and left all face up stacked respectively, measure stacked disk one-tenth-value thickness 1/10 with thickness gauge, every tobacco leaf is a repetition, totally 10 repetitions;

(2) calibration of instrument and adjusting

Open thickness gauge,, thickness gauge is placed on the shockproof table top of level in 22 ℃ of temperature, 60% time test of humidity, the workplace cleaning is clean, and the driving lever of leaving behind makes measuring head contact with the iron platform, check the zero point of thickness gauge display, if display is non-vanishing, then zeroing;

(3) Determination of thickness

Test under the atmospheric conditions under 22 ℃ of temperature, the humidity 60%, lift measuring head, insert the tobacco leaf disk at measuring head and iron interstation, control speed gently, the measuring head that fell writes down one-tenth-value thickness 1/10 to disk surfaces after 2 minutes, is accurate to 0.001mm.All the other tobacco leaves of replication during the continuous-reading of 2 or a plurality of samples, should guarantee that worktable is in dustless state;

(4) the thickness in monolayer measurement result is calculated thickness in monolayer with the arithmetic mean value representation of 10 measurement results by formula (1), and result of calculation is accurate to 0.001mm;

$S=\underset{i=1}{\overset{10}{\mathrm{\Σ}}}\mathrm{Si}/10---\left(1\right)$

In the formula: S---thickness in monolayer, mm;

Lamination thickness measurement result calculates lamination thickness with the arithmetic mean value representation of 10 measurement results by formula (2), and result of calculation is accurate to 0.001mm;

$B=\underset{i=1}{\overset{10}{\mathrm{\Σ}}}\mathrm{Bi}/10---\left(2\right)$

In the formula: B---lamination thickness, mm.