CN106990093A - A kind of cotton-polyester blend Fabric Detection special portable formula Raman spectrometer and its quantitative approach - Google Patents
A kind of cotton-polyester blend Fabric Detection special portable formula Raman spectrometer and its quantitative approach Download PDFInfo
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- CN106990093A CN106990093A CN201710321788.XA CN201710321788A CN106990093A CN 106990093 A CN106990093 A CN 106990093A CN 201710321788 A CN201710321788 A CN 201710321788A CN 106990093 A CN106990093 A CN 106990093A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/02—Mechanical
- G01N2201/022—Casings
- G01N2201/0221—Portable; cableless; compact; hand-held
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/061—Sources
- G01N2201/06113—Coherent sources; lasers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/08—Optical fibres; light guides
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/12—Circuits of general importance; Signal processing
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Abstract
The invention discloses a kind of cotton-polyester blend Fabric Detection special portable formula Raman spectrometer and its quantitative approach, on the one hand, the invention provides a kind of portable cotton-polyester blend Fabric Detection special portable formula Raman spectrometer, including the case lid and base being hinged, interior empty accommodating area is provided with described base, the accommodating area bottom is provided with bottom plate and the vertical demarcation strip arranged in length and breadth on bottom plate, described base passes through bottom plate, vertical demarcation strip and base madial wall are divided into the first receiving area for being provided with laser and are provided with the second receiving area of spectrometer and supply unit, cross-brace plate is additionally provided with above described vertical demarcation strip；Described laser and spectrometer are connected with the input and output end of fibre-optical probe respectively.On the other hand, method also provides for a kind of quantitative approach of cotton-polyester blend Fabric Detection special portable formula Raman spectrometer.Accurate efficient measurement can be carried out by the present invention, and realize environmentally friendly quick nondestructive.
Description
Technical field
The present invention relates to cotton-polyester blend Fabric Detection field, more particularly to a kind of cotton-polyester blend Fabric Detection special portable formula
Raman spectrometer, further relates to a kind of quantitative approach of cotton-polyester blend Fabric Detection special portable formula Raman spectrometer.
Background technology
The detection of cotton-polyester blend fabric fiber compositions is that national compulsory is carried out, and sets up the technical regulation and mark of correlation
It is accurate.Cotton-polyester blend fabric fiber compositions detection limit is huge simultaneously.Current cotton-polyester blend fabric fiber compositions quantitative analysis is still
Based on chemical dissolution method, this method wastes time and energy, and need to consume a large amount of chemical reagent, inevitably to environment and people
The health care belt of member endangers.
Meanwhile, also librarian use infra-red sepectrometry and near infrared spectroscopy, both approaches can be detected accurately
The content of cotton-polyester blend fabric fiber compositions, but when both it is unusual to the requirement of the humiture of testing location environment high, it is impossible to
Measured under the humiture environment of setting, the precision that it can be influenceed to detect, so that the demand of Site Detection can not be met.Therefore, exist
Cotton-polyester blend fabric fiber compositions detect during be badly in need of one kind accurately can efficiently measure, it is less demanding to site environment simultaneously
And the detection method that environment will not be endangered to the health care belt of personnel and related device.
The content of the invention
The purpose of the present invention one is to provide a kind of cotton-polyester blend Fabric Detection special portable formula Raman spectrometer, Ke Yijin
The accurate efficient measurement of row, and realize environmentally friendly quick nondestructive.
The purpose of the present invention two is to provide a kind of quantitative approach of the Raman spectrometer.
To realize the purpose one there is provided a kind of portable cotton-polyester blend Fabric Detection special portable formula Raman spectrometer,
Including the case lid and base being hinged, be provided with interior empty accommodating area in described base, the accommodating area bottom provided with bottom plate and
The vertical demarcation strip arranged in length and breadth on bottom plate, described base passes through bottom plate, vertical demarcation strip and base madial wall point
It is divided into the first receiving area for being provided with laser and the second receiving area of spectrometer and supply unit, described vertical point is installed
The cross-brace plate for being used to place display control unit being adapted with the base madial wall shape is additionally provided with above dividing plate；Institute
The laser and spectrometer stated are connected with the input and output end of fibre-optical probe respectively.
Preferably, radiator is installed on the vertical demarcation strip at the rear of the laser beam emitting device.
Supply unit is installed on the vertical demarcation strip for being preferably located at the spectrometer rear, supply unit difference
It is connected with laser and spectrometer.
Preferably, power line is offered respectively in the vertical demarcation strip and transverse partition panel and fibre-optical probe transmission line is worn
The threading hole or Wire channel in building crossed.
Preferably, the inner side of the case lid is provided with foam protective layer, and foam protective layer is set towards the side of the base
There is the contact point in rectangular protrusion distribution.
To realize purpose two, a kind of portable cotton-polyester blend Fabric Detection special portable formula Raman spectrometer is additionally provided
Quantitative approach, this method includes following process step：
Step 1：Obtain the Raman spectrum of tested cotton-polyester blend fabric；
Step 2：Fluorescence background deduction pretreatment is carried out to the Raman spectrum of gained, standard spectrum is obtained；
Step 3：Feature extraction is carried out to the standard spectrum of gained, the Raman spectrum of cotton-polyester blend fabric is obtained；
Step 4：Partial least square model is set up with the cotton-polyester blend fabric feature Raman spectrum of gained, tested cotton is obtained and washs
The content of each fibre composition in blend fabric.
Preferably, in step 2, the fluorescence background deducts to pre-process is entered using adaptive iteration penalized least-squares method
Row processing obtains standard spectrum, and standard spectrum calculation formula is
T=(W+ λ D ' D)-1WX,
Wherein, T is standard spectrum, and λ is penalty coefficient, and D is difference matrix, and X is raman spectral signal, W be most weight to
Amount；Process step is as follows：
Step 201：Initialize weight vectors；
Step 202：Each step iterative value of weight vectors is obtained with below equation,
In formula,For weight vectors, xiFor raman spectral signal,It is fitting vector, dtIt is raman spectral signal and plan
Resultant vector amount difference is negative element, and t is variable；
Step 203：When | dt| the ＜ of ＜ 0.001 | xi| when, terminate iteration, obtain most weight vectors；
Step 204：Most weight vectors are obtained into standard spectrum according to standard spectrum calculation formula.
Preferably, in step 3, the feature extraction of progress obtains cotton-polyester blend using the random variable optimization method that leapfrogs and knitted
Thing Raman spectrum, including following process step：
Step 301：Generate initial Raman shift set at random according to standard spectrum, make wherein comprising random number Raman position
Move；
Include L variable in standard spectrum, be designated as set M, the initial Raman shift collection generated at random is combined into from this L
In variable, number is randomly selected for A (1<A<L variable), constitutes initial Raman shift set M0；
Step 302：According to initial Raman shift set, a normal state Raman position containing random number Raman shift is obtained
Set is moved, target Raman shift set is then obtained according to the acquisition pattern of target Raman shift set；
It from average is A that the acquisition pattern of normal state Raman shift set, which is, standard deviation for 0.3A normal distribution N (A,
A random number is produced in 0.3A), A* will be designated as from the nearest integer of this random number；
If A*=A, normal state Raman shift set M*=M0；
If A*<A, sets up PLS models first with all variables in M0, obtains the regression coefficient of each variable, then
A-A* minimum variable of the absolute value of regression coefficient is removed from M0, remaining A* variable constitutes normal state Raman shift collection
Close M*；
If A*>A, ω=A*-A (ω are chosen first from M0 supplementary set M-M0 with it>1) individual variable constitutes set D, then
PLS models are set up using all variables in D and M0, the regression coefficient of each variable are obtained, then by the absolute of regression coefficient
A* maximum variable of value is elected, and constitutes set M*；
The acquisition pattern of target Raman shift set is to calculate the mould set up using M0 respectively using the method for cross-verification
The predicated error Err of the type and predicated error Err* using the M* models set up；If Err/Err*≤0.1, receive M* and
Make target Raman shift set M1=M*；Otherwise target Raman shift set M1=M0 is made；
Step 303：Repeat step 301 arrives step 302 at least 1500 times；
Step 304：The target Raman shift set produced every time is evaluated, calculated in all target Raman shifts
The selected number of times of each Raman shift in set, selects the most Raman shift formation set of occurrence number and obtains cotton-polyester blend
Fabric feature Raman spectrum.
Preferably, in step 304, cotton-polyester blend fabric feature Raman spectrum is：692.0,704.3,734.8,807.3,
1000.8,1169.7,1358.7,1452.8,1504.2,1519.5,1689.0,1708.5,1790.3 (cm-1)。
Preferably, in step 4, the partial least square model is,
Y=T*bPLS,bPLS=W (PtW)-1Q,
Wherein, T is cotton-polyester blend fabric feature Raman spectrum, and y is content of fiber constituent value, bPLSFor regression coefficient, W is
The weight matrix of cotton-polyester blend fabric feature Raman spectrum matrix, PtFor the load moment of cotton-polyester blend fabric feature Raman spectrum
Battle array, Q is the load vectors of content of fiber constituent value, passes through the T and b of acquisitionPLSIt can be tested according to partial least square model
The content of each fibre composition in cotton-polyester blend fabric.
Compared with prior art, its advantage is the present invention：
The present invention is connected with fibre-optical probe respectively by laser and spectrometer so that ingenious in design, can be carried out accurate
Efficient measurement, and realize environmentally friendly quick nondestructive.Pass through the quantitative approach of the Raman spectrometer in the present invention so that detection
It is convenient and simple, while avoiding using chemical agent, so as to environmental protection and personnel health.Pass through the Raman in the present invention
The quantitative approach of spectrometer, can be prevented effectively from influence of the ambient temperature and humidity to accuracy of detection, so as to meet the need of Site Detection
Ask.Drawn in the present invention cotton-polyester blend fabric feature Raman spectrum U (692.0,704.3,734.8,807.3,1000.8,
1169.7,1358.7,1452.8,1504.2,1519.5,1689.0,1708.5,1790.3), these Raman shifts are washed for cotton
The detection of blend fabric is fixed.
Brief description of the drawings
Fig. 1 is the chassis interior structural representation of Raman spectrometer in the present invention；
Fig. 2 is the base outer surface structural representation of Raman spectrometer in the present invention；
Fig. 3 is the overall structure diagram of Raman spectrometer in the present invention；
Fig. 4 is the flow chart of the quantitative approach of Raman spectrometer in the present invention.
Embodiment
With reference to embodiment, the invention will be further described, but does not constitute any limitation of the invention, any
The modification of the limited number of time made in scope of the invention as claimed, still in scope of the presently claimed invention.
As shown in Fig. 1-Fig. 3, the invention provides a kind of portable cotton-polyester blend Fabric Detection special portable formula Raman light
Spectrometer, including the case lid 1 and base 2 being hinged, base 2 in be provided with interior empty accommodating area, accommodating area bottom be provided with bottom plate 21
And the vertical demarcation strip 22 arranged in length and breadth on bottom plate 21, base 2 pass through bottom plate 21, vertical demarcation strip 22 and base 2
Madial wall is divided into the first receiving area 31 for being provided with laser 4 and is provided with the second receiving area of spectrometer 5 and supply unit 6
32, the top of vertical demarcation strip 22 be additionally provided with the horizontal stroke for being used to place display control unit 7 being adapted with the madial wall shape of base 2
To supporting plate 24；Laser 4 and spectrometer 5 be connected respectively with the input and output end of fibre-optical probe 8.
Radiator 9 is installed on the vertical demarcation strip 22 at the rear of laser beam emitting device 4.Positioned at the perpendicular of the rear of spectrometer 5
Supply unit 6 is installed on to demarcation strip 22, the supply unit 6 is connected with laser 4 and spectrometer 5 respectively.Vertical demarcation strip
22 and transverse partition panel 23 on offer threading hole or Wire channel in building that power line and fibre-optical probe transmission line are passed through respectively.Case lid 1
Inner side provided with foam protective layer 11, the foam protective layer 11 towards the side of base 2 be provided with it is rectangular protrusion distribution connecing
Contact 12.
In the present embodiment, laser 4 include laser switch, laser adjusting knob, laser power supply module and
Laser safety key, so that it is guaranteed that the work of the safety and stability of laser 4, laser power supply module is connected with supply unit 6.It is aobvious
It can be computer to show control device 7, and spectrometer 5 can be connected by USB data line with computer.
In the present embodiment, it is additionally provided with AC power and computer power interface socket, supply unit 6 and sets in accommodating area
It is equipped with 12V DC power suppliers.
In the present embodiment, radiator 9 is radiator fan, and can be 1 or 2 or 3.
In the present embodiment, foam protective layer 11 and the contact point 12 being distributed in rectangular protrusion can be effectively in casings
Equipment positioned, and shock-absorbing capacity more preferably have good antihunt action.
Present invention also offers a kind of quantitative square of portable cotton-polyester blend Fabric Detection special portable formula Raman spectrometer
Method, this method includes following process step：
Step 1：Obtain the Raman spectrum of tested cotton-polyester blend fabric；
Step 2：Fluorescence background deduction pretreatment is carried out to the Raman spectrum of gained, standard spectrum is obtained；
Step 3：Feature extraction is carried out to the standard spectrum of gained, the Raman spectrum of cotton-polyester blend fabric is obtained；
Step 4：Partial least square model is set up with the cotton-polyester blend fabric feature Raman spectrum of gained, tested cotton is obtained and washs
The content of each fibre composition in blend fabric.
In step 2, the fluorescence background is deducted pretreatment and handled using adaptive iteration penalized least-squares method
Standard spectrum is obtained, standard spectrum calculation formula is
T=(W+ λ D ' D)-1WX,
Wherein, T is standard spectrum, and λ is penalty coefficient, and D is difference matrix, and X is raman spectral signal, W be most weight to
Amount；Process step is as follows：
Step 201：Initialize weight vectors；
Step 202：Each step iterative value of weight vectors is obtained with below equation,
In formula,For weight vectors, xiFor raman spectral signal,It is fitting vector, dtIt is raman spectral signal and plan
Resultant vector amount difference is negative element, and t is variable；
Step 203：When | dt| the ＜ of ＜ 0.001 | xi| when, terminate iteration, obtain most weight vectors；
Step 204：Most weight vectors are obtained into standard spectrum according to standard spectrum calculation formula.
In step 3, the feature extraction of progress obtains cotton-polyester blend fabric feature using the random variable optimization method that leapfrogs
Raman spectrum, including following process step：
Step 301：Generate initial Raman shift set at random according to standard spectrum, make wherein comprising random number Raman position
Move；
Include L variable in standard spectrum, be designated as set M, the initial Raman shift collection generated at random is combined into from this L
In variable, number is randomly selected for A (1<A<L variable), constitutes initial Raman shift set M0；
Step 302：According to initial Raman shift set, a normal state Raman position containing random number Raman shift is obtained
Set is moved, target Raman shift set is then obtained according to the acquisition pattern of target Raman shift set；
It from average is A that the acquisition pattern of normal state Raman shift set, which is, standard deviation for 0.3A normal distribution N (A,
A random number is produced in 0.3A), A* will be designated as from the nearest integer of this random number；
If A*=A, normal state Raman shift set M*=M0；
If A*<A, sets up PLS models first with all variables in M0, obtains the regression coefficient of each variable, then
A-A* minimum variable of the absolute value of regression coefficient is removed from M0, remaining A* variable constitutes normal state Raman shift collection
Close M*；
If A*>A, ω=A*-A (ω are chosen first from M0 supplementary set M-M0 with it>1) individual variable constitutes set D, then
PLS models are set up using all variables in D and M0, the regression coefficient of each variable are obtained, then by the absolute of regression coefficient
A* maximum variable of value is elected, and constitutes set M*；
The acquisition pattern of target Raman shift set is to calculate the mould set up using M0 respectively using the method for cross-verification
The predicated error Err of the type and predicated error Err* using the M* models set up；If Err/Err*≤0.1, receive M* and
Make target Raman shift set M1=M*；Otherwise target Raman shift set M1=M0 is made；
Step 303：Repeat step 301 is carried out 2000 times to step 302；
Step 304：The target Raman shift set produced every time is evaluated, calculated in all target Raman shifts
The selected number of times of each Raman shift in set, selects the most Raman shift formation set of occurrence number and obtains cotton-polyester blend
Fabric feature Raman spectrum.
In the present embodiment, 291 variables are included in standard spectrum.Step 303 can also repeat 1500 times or
1800 times or 2200 times.PLS models are partial least square method PLS models, can be passed through
Smartpls softwares input variable calculate obtaining regression coefficient.
In step 304, cotton-polyester blend fabric feature Raman spectrum is：692.0,704.3,734.8,807.3,1000.8,
1169.7,1358.7,1452.8,1504.2,1519.5,1689.0,1708.5,1790.3 (cm-1).These Raman shifts for
The detection of cotton-polyester blend fabric is fixed.
In step 4, the partial least square model is,
Y=T*bPLS,bPLS=W (PtW)-1Q,
Wherein, T is cotton-polyester blend fabric feature Raman spectrum, and y is content of fiber constituent value, bPLSFor regression coefficient, W is
The weight matrix of cotton-polyester blend fabric feature Raman spectrum matrix, PtFor the load moment of cotton-polyester blend fabric feature Raman spectrum
Battle array, Q is the load vectors of content of fiber constituent value, passes through the T and b of acquisitionPLSIt can be tested according to partial least square model
The content of each fibre composition in cotton-polyester blend fabric.
The course of work of the present embodiment：Start Raman spectrometer in the present invention, start control computer, regulate as needed
Laser 4, the Raman spectrum of tested cotton-polyester blend fabric is obtained by fibre-optical probe 8；Fluorescence is carried out to the Raman spectrum of gained
Background deduction is pre-processed, and obtains standard spectrum；Feature extraction is carried out to the standard spectrum of gained, the spy of cotton-polyester blend fabric is obtained
Levy Raman spectrum；Set up partial least square model with the cotton-polyester blend fabric feature Raman spectrum of gained, obtain tested cotton wash it is mixed
The content of each fibre composition in yarn fabric.
Accurate efficient measurement can be carried out by the present invention, and realize environmentally friendly quick nondestructive.
It the above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, do not taking off
On the premise of from structure of the present invention, several modifications and improvements can also be made, these effects implemented all without the influence present invention
And practical applicability.
Claims (10)
1. a kind of portable cotton-polyester blend Fabric Detection special portable formula Raman spectrometer, including the case lid (1) being hinged and bottom
Seat (2), it is characterised in that be provided with interior empty accommodating area in described base (2), the accommodating area bottom provided with bottom plate (21) and
The vertical demarcation strip (22) arranged in length and breadth on bottom plate (21), described base (2) passes through bottom plate (21), vertical demarcation strip
And base (2) madial wall is divided into and is provided with the first of laser (4) and accommodates area (31) and be provided with spectrometer (5) and electricity (22)
The second of source device (6) accommodates area (32), is additionally provided with and the base (2) madial wall shape above described vertical demarcation strip (22)
The cross-brace plate (24) for placing display control unit (7) that shape is adapted；Described laser (4) and spectrometer (5)
It is connected respectively with the input and output end of fibre-optical probe (8).
2. portable cotton-polyester blend Fabric Detection special portable formula Raman spectrometer according to claim 1, its feature exists
In being provided with radiator (9) on the vertical demarcation strip (22) at the rear of the laser beam emitting device (4).
3. portable cotton-polyester blend Fabric Detection special portable formula Raman spectrometer according to claim 1, its feature exists
In, supply unit (6) is installed on the vertical demarcation strip (22) at the spectrometer (5) rear, the supply unit (6) respectively
It is connected with laser (4) and spectrometer (5).
4. portable cotton-polyester blend Fabric Detection special portable formula Raman spectrometer according to claim 1, its feature exists
In offering power line on the vertical demarcation strip (22) and transverse partition panel (23) respectively and fibre-optical probe transmission line pass through
Threading hole or Wire channel in building.
5. portable cotton-polyester blend Fabric Detection special portable formula Raman light as claimed in any of claims 1 to 4
Spectrometer, it is characterised in that the inner side of the case lid (1) is provided with foam protective layer (11), and foam protective layer (11) is described in
The side of base (2) is provided with the contact point (12) in rectangular protrusion distribution.
6. a kind of quantitative square of portable cotton-polyester blend Fabric Detection special portable formula Raman spectrometer according to claim 1
Method, it is characterised in that this method includes following process step：
Step 1：Obtain the Raman spectrum of tested cotton-polyester blend fabric；
Step 2：Fluorescence background deduction pretreatment is carried out to the Raman spectrum of gained, standard spectrum is obtained；
Step 3：Feature extraction is carried out to the standard spectrum of gained, the Raman spectrum of cotton-polyester blend fabric is obtained；
Step 4：Partial least square model is set up with the cotton-polyester blend fabric feature Raman spectrum of gained, tested cotton-polyester blend is obtained
The content of each fibre composition in fabric.
7. a kind of quantitative approach of cotton-polyester blend Fabric Detection special portable formula Raman spectrometer according to claim 6,
Characterized in that, in step 2, the fluorescence background deducts pretreatment using at adaptive iteration penalized least-squares method
Reason obtains standard spectrum, and standard spectrum calculation formula is
T=(W+ λ D ' D)-1WX,
Wherein, T is standard spectrum, and λ is penalty coefficient, and D is difference matrix, and X is raman spectral signal, and W is most weight vectors；Place
Manage step as follows：
Step 201：Initialize weight vectors；
Step 202：Each step iterative value of weight vectors is obtained with below equation,
In formula,For weight vectors, xiFor raman spectral signal,It is fitting vector, dtFor raman spectral signal and be fitted to
Amount amount difference is negative element, and t is variable；
Step 203：When | dt| the ＜ of ＜ 0.001 | xi| when, terminate iteration, obtain most weight vectors；
Step 204：Most weight vectors are obtained into standard spectrum according to standard spectrum calculation formula.
8. a kind of quantitative approach of cotton-polyester blend Fabric Detection special portable formula Raman spectrometer according to claim 6,
Characterized in that, in step 3, the feature extraction of progress obtains cotton-polyester blend fabric spy using the random variable optimization method that leapfrogs
Levy Raman spectrum, including following process step：
Step 301：Generate initial Raman shift set at random according to standard spectrum, make wherein to include random number Raman shift；
Include L variable in standard spectrum, be designated as set M, the initial Raman shift collection generated at random is combined into from this L variable
In, number is randomly selected for A (1<A<L variable), constitutes initial Raman shift set M0；
Step 302：According to initial Raman shift set, a normal state Raman shift collection for containing random number Raman shift is obtained
Close, target Raman shift set is then obtained according to the acquisition pattern of target Raman shift set；
The acquisition pattern of normal state Raman shift set is is A from average, and standard deviation is in 0.3A normal distribution N (A, 0.3A)
A random number is produced, A* will be designated as from the nearest integer of this random number；
If A*=A, normal state Raman shift set M*=M0；
If A*<A, sets up PLS models first with all variables in M0, obtains the regression coefficient of each variable, then will return
A-A* variable for returning the absolute value of coefficient minimum removes from M0, and remaining A* variable constitutes normal state Raman shift set
M*；
If A*>A, ω=A*-A (ω are chosen first from M0 supplementary set M-M0 with it>1) individual variable constitutes set D, then utilizes
All variables in D and M0 set up PLS models, obtain the regression coefficient of each variable, then by the absolute value of regression coefficient most
A* big variable is elected, and constitutes set M*；
The acquisition pattern of target Raman shift set is to be calculated respectively using the method for cross-verification and utilize the M0 models set up
The predicated error Err and predicated error Err* using the M* models set up；If Err/Err*≤0.1, receive M* and make mesh
Mark Raman shift set M1=M*；Otherwise target Raman shift set M1=M0 is made；
Step 303：Repeat step 301 arrives step 302 at least 1500 times；
Step 304：The target Raman shift set produced every time is evaluated, calculated in all target Raman shift set
In each Raman shift selected number of times, select the most Raman shift of occurrence number and form set and obtain cotton-polyester blend fabric
Raman spectrum.
9. a kind of quantitative square of cotton-polyester blend Fabric Detection special portable formula Raman spectrometer according to claim 6 or 8
Method, it is characterised in that in step 304, cotton-polyester blend fabric feature Raman spectrum is：692.0,704.3,734.8,807.3,
1000.8,1169.7,1358.7,1452.8,1504.2,1519.5,1689.0,1708.5,1790.3 (cm-1)。
10. a kind of quantitative approach of cotton-polyester blend Fabric Detection special portable formula Raman spectrometer according to claim 9,
Characterized in that, in step 4, the partial least square model is,
Y=T*bPLS,bPLS=W (PtW)-1Q,
Wherein, T is cotton-polyester blend fabric feature Raman spectrum, and y is content of fiber constituent value, bPLSFor regression coefficient, W is that cotton is washed
The weight matrix of blend fabric Raman spectrum matrix, PtFor the loading matrix of cotton-polyester blend fabric feature Raman spectrum, Q is
The load vectors of content of fiber constituent value, pass through the T and b of acquisitionPLSCan be obtained according to partial least square model tested cotton wash it is mixed
The content of each fibre composition in yarn fabric.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801918A (en) * | 2018-06-29 | 2018-11-13 | 中国农业科学院农业质量标准与检测技术研究所 | A kind of complete machine structure of Portable Raman spectrometer |
| CN111893705A (en) * | 2020-08-11 | 2020-11-06 | 珠海格力电器股份有限公司 | Clothes care device and clothes care system |
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