CN109916970A - A kind of fast non-destructive detection method of the fresh tobacco leaves ash content based on capacitor - Google Patents
A kind of fast non-destructive detection method of the fresh tobacco leaves ash content based on capacitor Download PDFInfo
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- CN109916970A CN109916970A CN201910340793.4A CN201910340793A CN109916970A CN 109916970 A CN109916970 A CN 109916970A CN 201910340793 A CN201910340793 A CN 201910340793A CN 109916970 A CN109916970 A CN 109916970A
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- tobacco leaves
- ash content
- fresh tobacco
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Abstract
The fast non-destructive detection method of the present invention relates to a kind of fresh tobacco leaves ash content based on capacitor, belongs to technical field of analysis and detection.This method comprises the following steps: to fresh tobacco leaves upper surface capacitance per unit lengthC On , lower surface capacitance per unit lengthC Under And between blade upper and lower surfaceC Between Capacitance per unit length measures；The capacitance per unit length numerical value that will be measured, substitution such as drag are calculated, and the mass percentage of fresh tobacco leaves ash content can be obtained；The model are as follows:A Ash content contains rate =0.19×C On +0.23×C Under +1.56×C Between .Operation of the present invention is simple, required time is short, as a result accurately, no longer needs to by subsequent complicated analysis, it is only necessary to which a few minutes can be obtained by the content of ashes numerical value of fresh tobacco leaves, can be used for the judgement of fresh tobacco leaves quality and maturity.Meanwhile the present invention is non-destructive testing, entire detection process does not damage tobacco plant and tobacco leaf, can directly carry out In vivo detection.
Description
Technical field
The invention belongs to technical field of analysis and detection, are related to the detection method of fresh tobacco leaves ingredient, and in particular to Yi Zhongji
In the fast non-destructive detection method of the fresh tobacco leaves ash content of capacitor.
Background technique
The chemical composition of tobacco leaf is largely various organic substances, is partially inorganic matter i.e. moisture and minerals.Tobacco
It almost can detecte all inorganic elements in blade, the content of ashes of cured tobacco leaf is about 10% or so, and ash content is main
It is made of mineral element, appearance of these mineral elements in tobacco leaf to tobacco leaf, the influence of flavor and taste, irritation, flammability etc.
It significantly, is an important factor for influencing quality of tobacco.What is be wherein affected has potassium, calcium, magnesium, sulphur, chlorine, secondly for iron, manganese, zinc,
Molybdenum.
The content of organic substance and mutual ratio are the central factor for determining quality of tobacco, the content pair of various mineral elements
The growth and development of tobacco and quality of tobacco play an important role.The interior quality of the content of ashes of tobacco and ash composition and tobacco
There is important relationship with physical property.Tobacco ash element does not directly affect the sucking quality of tobacco leaf generally, and content of ashes is higher,
Corresponding organic component content is lower, and the ingredient for being conducive to sucking quality is also fewer, and therefore, content of ashes is higher, tobacco leaf product
Matter is poorer.
Tobacco leaf total ash content and characteristic and tobacco leaf flammability have direct relation, also have certain pass with other qualitative factors
System.It is, in general, that tobacco leaf total ash content is higher, better, and overall quality is generally poor for flammability.High-quality tobacco leaf burning
When be it is uniform, complete, ash content it is white and have coherency.
The content of tobacco leaf total ash and main mineral elements, except mainly by environmental conditions such as kind, weather, soil and applying
Also because of the raising of maturity corresponding change can occur for the cultivation steps such as fertilizer, watering outside influencing.Mine is frequently encountered in tobacco growing
Prime element lacks or supplies unbalanced problem.The relationship for studying ash element and chemical component, to understanding tobacco growing situation
And rule, the nutrition problem occurred during tobacco growing is solved with a definite target in view, improves tobacco quality and yield with great
Meaning.
Currently, the detection for tobacco leaf ash content mainly uses dry ashing gravimetric method, i.e., tobacco leaf is placed in crucible,
550 DEG C of high temperature under aerobic environment, decompose the ash content obtained after oxidation completely, carry out weighing and calculate its content of ashes.This method
Disadvantage mainly cannot directly detect and detection process has damage fresh tobacco leaves and tobacco plant.Therefore how to overcome existing
The problem of deficiency of technology is present analysis detection technique field urgent need to resolve.
Summary of the invention
It is an object of the present invention to solve the deficiency of the existing technology and provide a kind of fresh tobacco leaves ash content based on capacitor
Fast non-destructive detection method, this method is easy to operate, required time is short, it is only necessary to which a few minutes can be obtained by the ash of fresh tobacco leaves
Divide and contain numerical quantity, can be used for the judgement of fresh tobacco leaves quality and maturity.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of fast non-destructive detection method of the fresh tobacco leaves ash content based on capacitor, includes the following steps:
Step (1), the detection of fresh tobacco leaves capacitance per unit length:
To fresh tobacco leaves upper surface capacitance per unit length COn, lower surface capacitance per unit length CUnderAnd between blade upper and lower surface
Capacitance per unit length CBetweenIt measures；
Step (2), the calculating of fresh tobacco leaves content of ashes:
The capacitance per unit length numerical value that will be measured, substitution such as drag are calculated, and fresh tobacco leaves ash content can be obtained
Mass percentage；
The model are as follows:
AAsh content contains rate=0.19 × COn+0.23×CUnder+1.56×CBetween, wherein AAsh content contains rate% is the quality hundred of fresh tobacco leaves ash content
Divide content.
It is further preferred that capacitance per unit length unit be pico farad/centimetre.
It is further preferred that capacitance per unit length value measures capacitor and its distance between two test points in step (1)
Ratio.
It is further preferred that in step (1), the measurement specifically chooses tobacco leaf blade tip respectively, in leaf and phyllopodium three
Capacitance per unit length between part detection upper surface, lower surface and upper and lower surface, every part detection number are no less than 3 times, and right
All measurement data are averaged.
It is further preferred that test point avoids leaf vein, and the line between test point does not span across leaf vein.
Compared with prior art, the present invention has the advantages that:
(1) operation of the present invention is simple, required time is short, it is only necessary to which a few minutes can be obtained by the content of ashes of fresh tobacco leaves
Numerical value can be used for the judgement of fresh tobacco leaves quality and maturity.
(2) present invention is non-destructive testing, and entire detection process does not damage tobacco plant and tobacco leaf, can be direct
Carry out In vivo detection.
(3) testing result of the present invention is accurate, no longer needs to by subsequent complicated analysis, the ash content that fresh tobacco leaves can be obtained contains
Measure exact value.
(4) time of measuring of the present invention foreshortens to 5min by the 60min of conventional dry gravimetric method, and efficiency increases 12 times.It surveys
Amount result matches with conventional method, and error is less than 10%.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail.
It will be understood to those of skill in the art that the following example is merely to illustrate the present invention, and it should not be regarded as limiting this hair
Bright range.In the examples where no specific technique or condition is specified, described technology or conditions according to the literature in the art
Or it is carried out according to product description.Production firm person is not specified in material therefor or equipment, is that can be obtained by purchase
Conventional products.
Embodiment 1
A kind of fast non-destructive detection method of the fresh tobacco leaves ash content based on capacitor, includes the following steps:
Step (1), the detection of fresh tobacco leaves capacitance per unit length:
To fresh tobacco leaves upper surface capacitance per unit length COn, lower surface capacitance per unit length CUnderAnd between blade upper and lower surface
Capacitance per unit length CBetweenIt measures；
Step (2), the calculating of fresh tobacco leaves content of ashes:
The capacitance per unit length numerical value that will be measured, substitution such as drag are calculated, and fresh tobacco leaves ash content can be obtained
Mass percentage；
The model are as follows:
AAsh content contains rate=0.19 × COn+0.23×CUnder+1.56×CBetween, wherein AAsh content contains rate% is the quality hundred of fresh tobacco leaves ash content
Divide content.
Embodiment 2
A kind of fast non-destructive detection method of the fresh tobacco leaves ash content based on capacitor, includes the following steps:
Step (1), the detection of fresh tobacco leaves capacitance per unit length:
To fresh tobacco leaves upper surface capacitance per unit length COn, lower surface capacitance per unit length CUnderAnd between blade upper and lower surface
Capacitance per unit length CBetweenIt measures；
Step (2), the calculating of fresh tobacco leaves content of ashes:
The capacitance per unit length numerical value that will be measured, substitution such as drag are calculated, and fresh tobacco leaves ash content can be obtained
Mass percentage；
The model are as follows:
AAsh content contains rate=0.19 × COn+0.23×CUnder+1.56×CBetween, wherein AAsh content contains rate% is the quality hundred of fresh tobacco leaves ash content
Divide content.
In step (1), capacitance per unit length value measures the ratio of capacitor and its distance between two test points, and unit is skin
Method/centimetre.
Embodiment 3
A kind of fast non-destructive detection method of the fresh tobacco leaves ash content based on capacitor, includes the following steps:
Step (1), the detection of fresh tobacco leaves capacitance per unit length:
To fresh tobacco leaves upper surface capacitance per unit length COn, lower surface capacitance per unit length CUnderAnd between blade upper and lower surface
Capacitance per unit length CBetweenIt measures；
Step (2), the calculating of fresh tobacco leaves content of ashes:
The capacitance per unit length numerical value that will be measured, substitution such as drag are calculated, and fresh tobacco leaves ash content can be obtained
Mass percentage；
The model are as follows:
AAsh content contains rate=0.19 × COn+0.23×CUnder+1.56×CBetween, wherein AAsh content contains rate% is the quality hundred of fresh tobacco leaves ash content
Divide content.
In step (1), capacitance per unit length value measures the ratio of capacitor and its distance between two test points, and unit is skin
Method/centimetre.The measurement specifically chooses tobacco leaf blade tip respectively, in leaf and phyllopodium three parts detection upper surface, lower surface and on
Capacitance per unit length between lower surface, every part detection number is no less than 3 times, and is averaged to all measurement data.
When detection, test point avoids leaf vein, and the line between test point does not span across leaf vein.
The construction method of model of the present invention is as follows:
1. data acquire
Different cultivars, planting conditions and the living body tobacco plant in growth period are chosen, it is miscellaneous to remove silt, the moisture on surface etc.
Matter.Using digital electric bridge high-accuracy capacitor table, frequency 500Hz is measured, tobacco leaf position is measured, is read after stablizing 10s
Number, each position pendulous frequency are no less than 3 times, take its average value.Ambient humidity is not more than 40% when detection, temperature range 18-
30℃。
2. standard method measures
For above-mentioned tobacco leaf, according to bibliography (Zhengzhou Yan Keyu tobacco chemistry (M): publishing house, Zhengzhou University,
2002:242-245,263-264) described in dry ashing gravimetric method, i.e., tobacco leaf is placed in crucible, it is aerobic in 550 DEG C of high temperature
Under environment, calcination 60min decomposes the ash content obtained after oxidation completely, carries out weighing and calculates its content of ashes.
3. model foundation
To in 1,2 the data obtaineds abnormal data and outlier identified and rejected, 268 sample numbers of final choice
According to importing SPSS software is established electrical characteristics and quickly detected linear regression model (LRM) using least square method multiple linear regression:
AAsh content contains rate=0.19 × COn+0.23×CUnder+1.56×CBetween, R2=0.979, wherein AAsh content contains rate% is the quality of fresh tobacco leaves ash content
Percentage composition.
Application example
A kind of fast non-destructive detection method of the fresh tobacco leaves ash content based on capacitor, includes the following steps:
Step (1), the detection of fresh tobacco leaves capacitance per unit length:
To fresh tobacco leaves upper surface capacitance per unit length COn, lower surface capacitance per unit length CUnderAnd between blade upper and lower surface
Capacitance per unit length CBetweenIt measures；
Step (2), the calculating of fresh tobacco leaves content of ashes:
The capacitance per unit length numerical value that will be measured, substitution such as drag are calculated, and fresh tobacco leaves ash content can be obtained
Mass percentage；
The model are as follows:
AAsh content contains rate=0.19 × COn+0.23×CUnder+1.56×CBetween, wherein AAsh content contains rate% is the quality hundred of fresh tobacco leaves ash content
Divide content.
Capacitance per unit length unit be pico farad/centimetre.
In step (1), capacitance per unit length value measures the ratio of capacitor and its distance between two test points.
In step (1), the measurement specifically chooses tobacco leaf blade tip respectively, in leaf and phyllopodium three parts detection upper surface,
Capacitance per unit length between lower surface and upper and lower surface, every part detection number is no less than 3 times, and is carried out to all measurement data
It is average.
Test point avoids leaf vein, and the line between test point does not span across leaf vein.
Further illustrate the desired effect that the present invention is reached, inventor has randomly selected different on 20 plants of tobacco plants
Position tobacco leaf, kind and concrete position are shown in Table 1, detect its fresh tobacco leaves upper surface capacitance per unit length (COn), following table
Face capacitance per unit length (CUnder) and blade upper and lower surface between capacitance per unit length (CBetween), capacitance per unit length unit uses skin
Method/centimetre, using model AAsh content contains rate=0.19 × COn+0.23×CUnder+1.56×CBetween, coefficient of determination r2=0.979, calculate it
The value of fresh tobacco leaves content of ashes, while using dry ashing gravimetric method, i.e., after fresh tobacco leaves being weighed, it is placed in crucible,
550 DEG C of high temperature under aerobic environment, decompose the ash content obtained after oxidation completely, carry out weighing and calculate its content of ashes, as fresh
The measured value of tobacco leaf ash content, the results are shown in Table 2.
Table 1
Test result shows that fresh tobacco leaves ash content predicting value and measured value difference are smaller, and the prediction result of prediction model is quasi-
Really.Time of measuring foreshortens to 5min by the 60min of conventional dry gravimetric method, and efficiency obviously increases.
2 20 parts of fresh tobacco leaves sample ash content predicting values of table are compared with measured value
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (5)
1. a kind of fast non-destructive detection method of the fresh tobacco leaves ash content based on capacitor, which comprises the steps of:
Step (1), the detection of fresh tobacco leaves capacitance per unit length:
To fresh tobacco leaves upper surface capacitance per unit lengthC On , lower surface capacitance per unit lengthC Under And unit between blade upper and lower surface
Length capacitorC Between It measures；
Step (2), the calculating of fresh tobacco leaves content of ashes:
The capacitance per unit length numerical value that will be measured, substitution such as drag are calculated, and the quality of fresh tobacco leaves ash content can be obtained
Percentage composition；
The model are as follows:
A Ash content contains rate =0.19×C On +0.23×C Under +1.56×C Between , whereinA Ash content contains rate % is the mass percentage of fresh tobacco leaves ash content.
2. the fast non-destructive detection method of the fresh tobacco leaves ash content according to claim 1 based on capacitor, which is characterized in that
Capacitance per unit length unit be pico farad/centimetre.
3. the fast non-destructive detection method of the fresh tobacco leaves ash content according to claim 1 based on capacitor, which is characterized in that
In step (1), capacitance per unit length value measures the ratio of capacitor and its distance between two test points.
4. the fast non-destructive detection method of the fresh tobacco leaves ash content according to claim 1 based on capacitor, which is characterized in that
In step (1), the measurement specifically chooses tobacco leaf blade tip respectively, in leaf and phyllopodium three parts detection upper surface, lower surface and
Capacitance per unit length between upper and lower surface, every part detection number is no less than 3 times, and is averaged to all measurement data.
5. the fast non-destructive detection method of the fresh tobacco leaves ash content according to claim 1 or 4 based on capacitor, feature exist
In test point avoids leaf vein, and the line between test point does not span across leaf vein.
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