CN108344715A - Material composition discrimination method, device and computer equipment based on ATR patterns - Google Patents
Material composition discrimination method, device and computer equipment based on ATR patterns Download PDFInfo
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- 239000000203 mixture Substances 0.000 title claims abstract description 36
- 238000012850 discrimination method Methods 0.000 title claims abstract description 17
- 230000003595 spectral effect Effects 0.000 claims abstract description 105
- 238000001514 detection method Methods 0.000 claims abstract description 48
- 239000004615 ingredient Substances 0.000 claims abstract description 29
- 238000003860 storage Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims description 60
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- 238000004458 analytical method Methods 0.000 claims description 10
- 238000001228 spectrum Methods 0.000 claims description 9
- 238000010835 comparative analysis Methods 0.000 claims description 6
- 238000005102 attenuated total reflection Methods 0.000 description 100
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 15
- 229960001031 glucose Drugs 0.000 description 14
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- 238000010586 diagram Methods 0.000 description 7
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- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
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- 241000638935 Senecio crassissimus Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3581—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3581—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation
- G01N21/3586—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]
Abstract
This application involves a kind of material composition discrimination method, device, computer equipment and storage mediums based on ATR patterns.Method includes：The total reflection signal that detector receives when acquiring THz wave irradiation ATR modules under ATR patterns, obtains reference signal；The total reflection signal that detector receives when THz wave irradiation is placed with the ATR modules of measured matter under ATR patterns is obtained, detection signal is obtained；According to the spectral information of reference signal and detection signal acquisition measured matter；The spectral information for the multiple standard items for comparing the spectral information of measured matter and prestoring obtains the ingredient of measured matter.The accuracy of material composition discriminating can be improved using this method.
Description
Technical field
This application involves composition detection technical fields, more particularly to a kind of material composition discriminating side based on ATR patterns
Method, device, computer equipment and storage medium.
Background technology
THz wave refer to frequency 0.1THz (Terahertz) -10THz, wave-length coverage 0.03mm (millimeter) -30mm it
Between electromagnetic wave, wave band be located at microwave and it is infrared between, penetration power is strong.With the appearance of terahertz time-domain spectroscopic technology, too
Hertz wave can be used for carrying out fingerprint recognition to substance.
Using THz wave to substance carry out fingerprint recognition by the way of it is general there are three types of：Transmission mode, reflective-mode and
ATR (Attenuated Total Reflection decaying total reflection) pattern, the most commonly used is ATR patterns.As shown in Figure 1, femtosecond
Laser (fs laser) is divided into two by beam splitting chip BS, all the way as detection light, is used as pump light, pump optical radiation all the way
Make generation THz wave (THz wave) on THz wave generator (THz emitter)；Under ATR patterns, by substance (as schemed
Sample in 1) it is placed in ATR modules, THz wave injects ATR modules, is totally reflected generation evanescent wave by ATR modules,
Evanescent wave air-borne transmission is received by detector (THz detector).It is traditional that substance is differentiated using THz wave
Mode is to use ATR patterns mostly, is analyzed detector received signal under ATR patterns to determine material composition.However,
The signal acquired under ATR patterns is generally weaker than transmission mode, and directly carrying out analysis according to the signal of ATR pattern acquirings is easy out
Now big error so that substance differentiates that accuracy is low.
Invention content
Based on this, it is necessary in view of the above technical problems, provide it is a kind of can improve ingredient differentiate accuracy based on ATR
Material composition discrimination method, device, computer equipment and the storage medium of pattern.
A kind of material composition discrimination method based on ATR patterns, the method includes：
The total reflection signal that detector receives when acquiring THz wave irradiation ATR modules under ATR patterns, obtains with reference to letter
Number；
Detector receives full when THz wave irradiation is placed with the ATR modules of measured matter under acquisition ATR patterns
Signal is reflected, detection signal is obtained；
According to the spectral information of measured matter described in the reference signal and the detection signal acquisition；
The spectral information of the spectral information and the multiple standard items to prestore that compare the measured matter obtains the measured object
The ingredient of matter.
A kind of material composition identification device based on ATR patterns, described device include：
Reference signal acquisition module, detector receives full when for acquiring THz wave irradiation ATR modules under ATR patterns
Signal is reflected, reference signal is obtained；
Signal acquisition module is detected, the ATR of measured matter is placed with for obtaining THz wave irradiation under ATR patterns
The total reflection signal that detector receives when module obtains detection signal；
Spectral information obtaining module, for according to measured matter described in the reference signal and the detection signal acquisition
Spectral information；
The spectrum of comparative analysis module, spectral information and the multiple standard items to prestore for comparing the measured matter is believed
Breath obtains the ingredient of the measured matter.
A kind of computer equipment, including memory and processor, the memory are stored with computer program, the processing
Device realizes following steps when executing the computer program：
The total reflection signal that detector receives when acquiring THz wave irradiation ATR modules under ATR patterns, obtains with reference to letter
Number；
Detector receives full when THz wave irradiation is placed with the ATR modules of measured matter under acquisition ATR patterns
Signal is reflected, detection signal is obtained；
According to the spectral information of measured matter described in the reference signal and the detection signal acquisition；
The spectral information of the spectral information and the multiple standard items to prestore that compare the measured matter obtains the measured object
The ingredient of matter.
A kind of computer readable storage medium, is stored thereon with computer program, and the computer program is held by processor
Following steps are realized when row：
The total reflection signal that detector receives when acquiring THz wave irradiation ATR modules under ATR patterns, obtains with reference to letter
Number；
Detector receives full when THz wave irradiation is placed with the ATR modules of measured matter under acquisition ATR patterns
Signal is reflected, detection signal is obtained；
According to the spectral information of measured matter described in the reference signal and the detection signal acquisition；
The spectral information of the spectral information and the multiple standard items to prestore that compare the measured matter obtains the measured object
The ingredient of matter.
Above-mentioned material composition discrimination method, device, computer equipment and storage medium based on ATR patterns, reference signal
It is the obtained total reflection signal of ATR modules that substance is not placed in THz wave irradiation, detection signal is that THz wave irradiation is put
The obtained total reflection signal of ATR modules for setting measured matter can obtain measured matter according to reference signal and detection signal
Spectral information, the spectral information of standard items for then comparing the spectral information of measured matter and prestoring, according to comparing result point
Analysis obtains the ingredient of measured matter.Due to introducing the spectral informations of standard items as reference object, with two kinds of spectral informations pair
The mode distinctive compound of ratio, accuracy higher, to which the accuracy of material composition discriminating can be improved.
Description of the drawings
Fig. 1 is the operation principle schematic diagram that ATR patterns use THz wave to measure；
Fig. 2 is the flow diagram of the material composition discrimination method based on ATR patterns in one embodiment；
Fig. 3 is to be shown according to the flow of reference signal and the spectral information of detection signal acquisition measured matter in one embodiment
It is intended to；
Fig. 4 is the flow diagram of the material composition discrimination method based on ATR patterns in another embodiment；
Fig. 5 is the absorption spectra schematic diagram of glucose and Dextrose Monohydrate in an embodiment；
Fig. 6 is the absorption spectra schematic diagram of the powder containing glucose and the powder containing Dextrose Monohydrate in an embodiment；
Fig. 7 is the structure diagram of the material composition identification device based on ATR patterns in one embodiment；
Fig. 8 is the internal structure chart of one embodiment Computer equipment.
Specific implementation mode
It is with reference to the accompanying drawings and embodiments, right in order to make the object, technical solution and advantage of the application be more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
In one embodiment, as shown in Fig. 2, a kind of material composition discrimination method based on ATR patterns is provided, with this
Method is applied to illustrate for terminal, includes the following steps：
S110：The total reflection signal that detector receives when acquiring THz wave irradiation ATR modules under ATR patterns, is joined
Examine signal.
ATR modules are a kind of devices for realizing decaying total reflection.Such as ATR modules shown in FIG. 1 are silicon crystal material
The Dove prism of material is generated with 35 degree of angle cuttings, that is, two base angles of Dove prism are 35 degree, in order to easy for installation
Triangular prism can be cut into isosceles trapezoid prism.The ATR modules that THz wave irradiates in step S110 are not place object
Without placing sample in the ATR modules of matter, such as ATR modules in Fig. 1.Total reflection signal refers to Terahertz under ATR patterns
The evanescent wave that wave is generated through total reflection.Specifically, terminal can be full when irradiating ATR modules from detector acquisition THz wave
Reflect signal and as with reference to signal.
S130：Detector receives full when THz wave irradiation is placed with the ATR modules of measured matter under acquisition ATR patterns
Signal is reflected, detection signal is obtained.
Measured matter is the substance for having absorption to THz wave, needing to be authenticated ingredient.For example, measured matter can be
Solid carbohydrate.Specifically, measured matter is covered in ATR Modular surfaces with powdered, and applying pressure makes measured matter and ATR moulds
Block intimate surface contact.After THz wave injects ATR modules, total reflection is generated in the interface of ATR modules and measured matter.Tool
Body, terminal can be total reflection signal when being placed with the ATR modules of measured matter from detector acquisition THz wave irradiation
And as detection signal.
S150：According to the spectral information of reference signal and detection signal acquisition measured matter.
Spectral information is for reflecting THz wave by the information of absorption frequency range；The spectral information for obtaining measured matter, can
To know that measured matter has absorption to the THz wave of which frequency from spectral information.Specifically, terminal can be compared with reference to letter
Number and detection signal difference obtain spectral information.
S170：The spectral information for the multiple standard items for comparing the spectral information of measured matter and prestoring obtains measured matter
Ingredient.
Standard items are the known substances that can absorb THz wave.The spectral information of multiple standard items is obtained and is deposited in advance
Storage.Specifically, terminal can be compared the spectral information of measured matter with the spectral information of the multiple standard items to prestore,
Analyze in measured matter whether contain corresponding standard items according to comparison result, to differentiate the ingredient of measured matter.
In the above-mentioned material composition discrimination method based on ATR patterns, reference signal is that substance is not placed in THz wave irradiation
The obtained total reflection signal of ATR modules, detection signal be THz wave irradiation place measured matter ATR modules obtained by
Total reflection signal, the spectral information of measured matter can be obtained according to reference signal and detection signal, then compare measured object
The spectral information of the spectral information of matter and the standard items to prestore, analyzes to obtain the ingredient of measured matter according to comparing result.Due to
The spectral information of standard items is introduced as reference object, the distinctive compound in such a way that two kinds of spectral informations compare, accuracy is more
Height, to which the accuracy of material composition discriminating can be improved.
In addition, it is traditional using transmission mode discriminating have the substance absorbed more by force for THz wave when, in fact it could happen that light
Modal data is saturated, inconvenience analysis.Therefore first measured matter dried using transmission mode progress THz wave pre-irradiation needs, ground
Mill, sieving simultaneously carry out mixed grinding with the substance for not absorbing THz wave, and process is cumbersome and wastes time, if grinding is uneven
It can also cause that local concentration is larger, grain size is larger and there is certain scattering to influence THz wave, spectroscopic data is inaccurate.And this
The material composition discrimination method based on ATR patterns of application uses ATR patterns, ATR patterns relatively to absorb THz wave by force to differentiating
Substance or be applicable in compared with the substance of weak absorbing THz wave, do not have apparent spectroscopic data saturation, can be saved compared to transmission mode
The operation to measured matter mixed grinding is gone, the operating time is saved, and can avoid the uneven error that may be brought of mixed grinding,
So that measurement data is more acurrate, to more acurrate to the discriminating of material composition.
In one embodiment, with reference to figure 3, step S150 includes step S151 to step S153.
S151：Fourier transform is carried out to reference signal and obtains the first frequency-region signal.
Reference signal is time-domain signal, by carrying out Fourier transform to reference signal to which time domain is transformed to frequency domain.
S152：Fourier transform is carried out to detection signal and obtains the second frequency-region signal.
It is time-domain signal to detect signal, by carrying out Fourier transform to detection signal to which time domain is transformed to frequency domain.
S153：Compare the first frequency-region signal and the second frequency-region signal obtains the spectral information of measured matter.
First frequency-region signal is that ATR modules do not place the frequency-region signal obtained corresponding to substance progress ATR pattern tests, the
Two frequency-region signals are that ATR modules place the frequency-region signal obtained corresponding to measured matter progress ATR pattern tests, compare the first frequency
The Frequency point that measured matter absorbs THz wave can be obtained in the difference of domain signal and second frequency signal, to obtain reflection terahertz
Hereby wave is by the spectral information of absorption frequency range.
By the way that the reference signal of time domain and detection signal to be converted to the first frequency-region signal and the second frequency-region signal of frequency domain,
Convenient for the difference between comparison reference signal and detection signal.
In one embodiment, the first frequency-region signal and the second frequency-region signal are to be as abscissa value, to absorb using frequency
Number is the curve of ordinate value.Step S153 includes：Compare under identical frequency between the first frequency-region signal and the second frequency-region signal
The difference of absorption coefficient；Absorption spectra is generated according to each difference, obtains the spectral information of measured matter.That is, in the present embodiment, spectrum
Information is absorption spectra.
Since measured matter is to the absorption of THz wave, same frequency is corresponded between reference signal and detection signal
Absorption coefficient can have differences.Compare the difference of absorption coefficient between the first frequency-region signal and the second frequency-region signal under identical frequency
Value, that is, the amplitude difference of the curve of the curve and the second frequency-region signal that calculate the first frequency-region signal in the ordinate.Each frequency
A corresponding difference, specifically, generating absorption spectra according to each difference may include：It is being vertical seat by abscissa, difference of frequency
In target rectangular coordinate system, the point for being sequentially connected difference corresponding to each frequency obtains the absorption spectra of curve form.
It is appreciated that in other embodiments, spectral information can also be the information of other forms, for example, step S153
Including：Compare the difference of absorption coefficient between the first frequency-region signal and the second frequency-region signal under identical frequency；It is given birth to according to each difference
At absorption spectra；The wave crest in absorption spectra is extracted, and obtains the frequency corresponding to wave crest and obtains spectral information.
In one embodiment, the spectral information of measured matter includes the frequency corresponding to the characteristic absorption peak of measured matter
Rate, the spectral information of standard items include the frequency corresponding to the characteristic absorption peak of standard items.Wherein, characteristic absorption peak is absorption spectra
In wave crest.One absorption spectra can have multiple characteristic absorption peaks, the i.e. spectral information of measured matter that can correspond to including multiple
The frequency of characteristic absorption peak.
In the present embodiment, step S170 includes：It calculates the frequency corresponding to the characteristic absorption peak of measured matter and prestores
The difference of frequency corresponding to the characteristic absorption peak of multiple standard items obtains difference；It is pre- to differentiate that the ingredient for obtaining measured matter is included in
If the standard items corresponding to difference in range.
Calculating difference can be the characteristic absorption that frequency corresponding to the characteristic absorption peak by measured matter subtracts standard items
Frequency corresponding to peak can also be the characteristic absorption that frequency corresponding to the characteristic absorption peak by standard items subtracts measured matter
Frequency corresponding to peak.Accordingly, it can also be negative value that difference, which can be positive value, and it is most that preset range, which is with preset negative value,
Small value, the numberical range that preset positive is maximum value.Characteristic absorption peak energy accurately reflects the absorption to THz wave；Pass through
Frequency corresponding to measured matter and the respective characteristic absorption peak of standard items is compared analysis, to differentiate that measured matter is
No includes standard items, and accuracy is high.
Wherein, preset range can be specifically arranged according to actual needs.In the present embodiment, the minimum value of preset range is hair
The negative value of the resolution ratio of the terahertz light spectrometer of THz wave is penetrated, the maximum value of preset range is to emit the Terahertz of THz wave
The positive value of the resolution ratio of spectrometer differentiates that accuracy is high.
Specifically, if frequency and the characteristic absorption peak institute of multiple standard items corresponding to the characteristic absorption peak of measured matter are right
The difference for the frequency answered within a preset range, then there are many ingredients of measured matter.For example, the characteristic absorption peak of measured matter
There are two, respective frequencies are X1 and X2 respectively；Frequency corresponding to the characteristic absorption peak of one standard items A is Y1, another mark
Frequency corresponding to the characteristic absorption peak of quasi- product B is Z1；Within a preset range, the difference of X2 and Z1 are default for the difference of X1 and Y1
In range.The ingredient that can so differentiate to obtain measured matter includes standard items A and standard items B.
In one embodiment, further include step S101 to step S103 before step S170 with reference to figure 4.The present embodiment
In, step S101 to step S103 is executed before step S110, it will be understood that in other embodiments, step S101 to step
Rapid S103 can also be executed after step silo, as long as before step S170.
S101：Detector receives when THz wave penetrates the sample storing unit for not placing standard items under acquisition of transmission pattern
Signal, obtain no sample transmission signal.
Sample storing unit is the device for placing substance.Specifically, sample storing unit can be by THz wave
Non-absorbent material is made, in order to avoid interfere.Under transmission mode, substance is placed in sample storing unit, and THz wave is saturating
It crosses after substance and signal is received by detector.
S102：Detector connects when THz wave penetrates the standard items being placed in sample storing unit under acquisition of transmission pattern
The signal of receipts, obtain corresponding standard items has sample transmission signal.
Standard items have multiple；THz wave transmission is carried out using transmission mode to each standard items respectively, is collected each
Standard items have sample transmission signal.
S103：There is sample transmission signal according to no sample transmission signal and each standard items, obtains corresponding standard items respectively
Spectral information and storage.
By being measured using transmission mode to standard items, the spectral signal accuracy of the standard items measured is high,
It is compared to play the spectral informations of standard items as reference object in the transmission mode, with the spectral information of measured matter, it can
To further increase the accuracy of measured matter ingredient discriminating.
Specifically, in step S103, there is sample transmission signal acquisition correspondence according to no sample transmission signal and standard items
The specific implementation of the spectral information of standard items according to reference signal and detects signal acquisition measured matter with step S150
Spectral information is similar, and first has sample transmission signal to carry out Fourier transform no sample transmission signal and standard items respectively
Frequency-region signal is obtained, then the frequency-region signal both compared obtains the spectral information of standard items, this will not be repeated here.
In one embodiment, standard items are not absorb by pure material and the substance of THz wave according to mass ratio 1:4 is mixed
Close obtained substance.
Wherein, pure material is the pure substance of other substances of undoping.The concentration of pure material is high, if directly with pure material into
The measurement of row transmission mode, it may appear that situations such as spectroscopic data saturation, characteristic absorption peak deviate, deviation occurs in measurement.By pressing
According to mass ratio 1:4, by pure material and the material mixing for not absorbing THz wave, make the reduction of pure material concentration, avoid the occurrence of feature suction
The case where receiving peak offset, can be improved the accuracy of transmission mode measurement.Specifically, the substance for not absorbing THz wave can be poly-
Ethylene.
It should be understood that although each step in the flow chart of Fig. 2-4 is shown successively according to the instruction of arrow,
These steps are not that the inevitable sequence indicated according to arrow executes successively.Unless expressly stating otherwise herein, these steps
Execution there is no stringent sequences to limit, these steps can execute in other order.Moreover, at least one in Fig. 2-4
Part steps may include that either these sub-steps of multiple stages or stage are not necessarily in synchronization to multiple sub-steps
Completion is executed, but can be executed at different times, the execution sequence in these sub-steps or stage is also not necessarily successively
It carries out, but can either the sub-step of other steps or at least part in stage be in turn or alternately with other steps
It executes.
To verify the accuracy of the above-mentioned material composition discrimination method based on ATR patterns, using glucose and a water grape
Sugar carries out testing experiment, is described as follows：
(1) prepare standard items：The high purity reagent of preparation glucose and Dextrose Monohydrate, in mass ratio 1:4 doping polyethylene,
The uniform sheet that thickness is about 2mm or so directly is made using the mold tabletting of 13mm diameters.
(2) transmission mode measures：Instrument used herein is TeraPulse_4000, and selection mode is transmission mode first,
It is 1000 that average time, which is arranged, and inflated with nitrogen obtains the absorption spectra of the glucose of standard items and the Dextrose Monohydrate of standard items successively
And it stores and obtains the spectral information of standard items.As shown in figure 5, S1 is the absorption spectra of glucose, S2 is the absorption of Dextrose Monohydrate
Spectrum, it can be seen that glucose is apparent for the absorption difference of THz wave with Dextrose Monohydrate, and glucose is only in the positions 1.44THz
There is apparent sharp characteristic absorption peak, and Dextrose Monohydrate has obviously sharply in the position 1.82THz, 1.98THz, 2.46THz
Characteristic absorption peak.
(3) ATR patterns measure：Using ATR modules as shown in Figure 1, contain glucose in the covering of ATR Modular surfaces respectively
Powder and powder containing Dextrose Monohydrate, and applying pressure makes powder be in close contact with ATR Modular surfaces, carries out respectively
ATR patterns measure.In ATR modules, connecing for ATR modules and measured matter is incident on the angles θ from right horizontal radiation for THz wave
Touch interface.Work as nsisinθ>When=1, THz wave generates total reflection, wherein n in ATR modules and measured matter interfacesiFor
The refractive index of ATR modules.Measurement obtains the powder containing glucose and the absorption spectra containing Dextrose Monohydrate as shown in fig. 6, S3
For the absorption spectra containing glucose powder, S4 is the absorption spectra containing Dextrose Monohydrate powder.It can obviously observe
There is the characteristic absorption as the absorption spectra of glucose in Fig. 5 in the positions 1.435THz, the absorption spectra containing glucose powder
Peak；Powder containing Dextrose Monohydrate is occurred with Dextrose Monohydrate in Fig. 5 in the positions 1.82THz in the positions 1.765THz
Consistent characteristic absorption peak.According to the difference of the two characteristic absorption peaks can differentiate tested powder be containing glucose or
Dextrose Monohydrate.
In one embodiment, as shown in fig. 7, providing a kind of material composition identification device based on ATR patterns, packet
It includes：Reference signal acquisition module 110, detection signal acquisition module 130, spectral information obtaining module 150 and comparative analysis module
170, wherein：
Reference signal acquisition module 110 is used to acquire what detector when THz wave irradiates ATR modules under ATR patterns received
Total reflection signal obtains reference signal.
Detection signal acquisition module 130 is used to obtain the ATR moulds that THz wave irradiation under ATR patterns is placed with measured matter
The total reflection signal that detector receives when block obtains detection signal.
Spectral information obtaining module 150 is used for the spectral information according to reference signal and detection signal acquisition measured matter.
Comparative analysis module 170 is used to compare the spectral information of the spectral information and the multiple standard items to prestore of measured matter
Obtain the ingredient of measured matter.
The above-mentioned material composition identification device based on ATR patterns, the reference signal that reference signal acquisition module 110 acquires are
THz wave irradiates the obtained total reflection signal of ATR modules for not placing substance, the inspection that detection signal acquisition module 130 obtains
It is the obtained total reflection signal of ATR modules that measured matter is placed in THz wave irradiation, spectral information obtaining module to survey signal
150 can obtain the spectral information of measured matter according to reference signal and detection signal, and then comparative analysis module 170 compares quilt
The spectral information for surveying the spectral information and the standard items to prestore of substance, analyzes to obtain the ingredient of measured matter according to comparing result.
Due to introducing the spectral informations of standard items as reference object, the distinctive compound in such a way that two kinds of spectral informations compare, accurately
Property higher, to can be improved material composition discriminating accuracy.
In addition, being reflected otherwise compared to transmission mode, the material composition based on ATR patterns of the application differentiates dress
It sets the operation that can be saved to measured matter mixed grinding, saves the operating time, and can avoid that mixed grinding is uneven to be brought
Error so that measurement data is more acurrate, to more acurrate to the discriminating of material composition.
In one embodiment, spectral information obtaining module 150 includes the first converter unit (not shown), the second transformation list
First (not shown) and frequency-domain analysis unit (not shown).First converter unit is used to carry out Fourier transform to reference signal to obtain
First frequency-region signal.Second converter unit is used to carry out Fourier transform to detection signal to obtain the second frequency-region signal.Frequency domain point
Analysis unit is used to compare the first frequency-region signal and the second frequency-region signal obtains the spectral information of measured matter.
By the way that the reference signal of time domain and detection signal to be converted to the first frequency-region signal and the second frequency-region signal of frequency domain,
Convenient for the difference between comparison reference signal and detection signal.
In one embodiment, the first frequency-region signal and the second frequency-region signal are to be as abscissa value, to absorb using frequency
Number is the curve of ordinate value.Frequency-domain analysis unit, which compares, to be inhaled under identical frequency between the first frequency-region signal and the second frequency-region signal
Receive the difference of coefficient；Absorption spectra is generated according to each difference, obtains the spectral information of measured matter.That is, in the present embodiment, spectrum letter
Breath is absorption spectra.
It is appreciated that in other embodiments, spectral information can also be the information of other forms, for example, frequency-domain analysis
Unit compares the difference of absorption coefficient between the first frequency-region signal and the second frequency-region signal under identical frequency；It is generated according to each difference
Absorption spectra；The wave crest in absorption spectra is extracted, and obtains the frequency corresponding to wave crest and obtains spectral information.
In one embodiment, the spectral information of measured matter includes the frequency corresponding to the characteristic absorption peak of measured matter
Rate, the spectral information of standard items include the frequency corresponding to the characteristic absorption peak of standard items.Comparative analysis module 170 calculates tested
The difference of frequency corresponding to the characteristic absorption peak of substance and the frequency corresponding to the characteristic absorption peak of the multiple standard items to prestore obtains
To difference；The ingredient that discriminating obtains measured matter includes the standard items corresponding to difference within a preset range.
Characteristic absorption peak energy accurately reflects the absorption to THz wave；By according to measured matter and the respective spy of standard items
Frequency corresponding to sign absorption peak is compared analysis, and to differentiate whether measured matter includes standard items, accuracy is high.
Wherein, preset range can be specifically arranged according to actual needs.In the present embodiment, the minimum value of preset range is hair
The negative value of the resolution ratio of the terahertz light spectrometer of THz wave is penetrated, the maximum value of preset range is to emit the Terahertz of THz wave
The positive value of the resolution ratio of spectrometer differentiates that accuracy is high.
In one embodiment, the material composition identification device based on ATR patterns further includes that (figure is not for data pre-storage module
Show), the letter that detector receives when penetrating the sample storing unit for not placing standard items for THz wave under acquisition of transmission pattern
Number, obtain no sample transmission signal；THz wave penetrates the standard items being placed in sample storing unit under acquisition of transmission pattern
When detector received signal, obtain corresponding standard items has sample transmission signal；According to no sample transmission signal and each standard
Product have sample transmission signal, obtain the spectral information of corresponding standard items and storage respectively.
By being measured using transmission mode to standard items, the spectral signal accuracy of the standard items measured is high,
It is compared to play the spectral informations of standard items as reference object in the transmission mode, with the spectral information of measured matter, it can
To further increase the accuracy of measured matter ingredient discriminating.
In one embodiment, standard items are not absorb by pure material and the substance of THz wave according to mass ratio 1:4 is mixed
Close obtained substance.By according to mass ratio 1:4, by pure material and the material mixing for not absorbing THz wave, make pure material concentration
The case where reducing, avoiding the occurrence of characteristic absorption peak offset, the accuracy of transmission mode measurement can be improved.Specifically, it does not absorb too
The substance of Hertz wave can be polyethylene.
Specific restriction about the material composition identification device based on ATR patterns may refer to above for based on ATR
The restriction of the material composition discrimination method of pattern, details are not described herein.In the above-mentioned material composition identification device based on ATR patterns
Modules can be realized fully or partially through software, hardware and combinations thereof.Above-mentioned each module can embed in the form of hardware
In processor in computer equipment, the memory that can also be stored in a software form in computer equipment
In, execute the corresponding operation of the above modules in order to which processor calls.
In one embodiment, a kind of computer equipment is provided, which can be terminal, internal structure
Figure can be as shown in Figure 8.The computer equipment includes the processor connected by system bus, memory, network interface, display
Screen and input unit.Wherein, the processor of the computer equipment is for providing calculating and control ability.The computer equipment is deposited
Reservoir includes non-volatile memory medium, built-in storage.The non-volatile memory medium is stored with operating system and computer journey
Sequence.The built-in storage provides environment for the operation of operating system and computer program in non-volatile memory medium.The calculating
The network interface of machine equipment is used to communicate by network connection with external terminal.When the computer program is executed by processor with
Realize a kind of material composition discrimination method based on ATR patterns.The display screen of the computer equipment can be liquid crystal display or
The input unit of person's electric ink display screen, the computer equipment can be the touch layer covered on display screen, can also be meter
Button, trace ball or the Trackpad being arranged on machine equipment shell are calculated, can also be external keyboard, Trackpad or mouse etc..
It will be understood by those skilled in the art that structure shown in Fig. 8, is only tied with the relevant part of application scheme
The block diagram of structure does not constitute the restriction for the computer equipment being applied thereon to application scheme, specific computer equipment
May include either combining certain components than more or fewer components as shown in the figure or being arranged with different components.
In one embodiment, a kind of computer equipment, including memory and processor are provided, is stored in memory
Computer program, the processor realize following steps when executing computer program：
The total reflection signal that detector receives when acquiring THz wave irradiation ATR modules under ATR patterns, obtains with reference to letter
Number；The total reflection signal that detector receives when THz wave irradiation is placed with the ATR modules of measured matter under ATR patterns is obtained,
Obtain detection signal；According to the spectral information of reference signal and detection signal acquisition measured matter；Compare the spectrum of measured matter
The spectral information of information and the multiple standard items to prestore obtains the ingredient of measured matter.
Above computer equipment realizes the above-mentioned material composition discrimination method based on ATR patterns, substance similarly can be improved
The accuracy that ingredient differentiates.
In one embodiment, following steps are also realized when processor executes computer program：Fu is carried out to reference signal
Vertical leaf transformation obtains the first frequency-region signal；Fourier transform is carried out to detection signal and obtains the second frequency-region signal；Compare the first frequency
Domain signal and the second frequency-region signal obtain the spectral information of measured matter.
In one embodiment, the first frequency-region signal and the second frequency-region signal are to be as abscissa value, to absorb using frequency
Number is the curve of ordinate value.Processor also realizes following steps when executing computer program：Compare the first frequency under identical frequency
The difference of absorption coefficient between domain signal and the second frequency-region signal；Absorption spectra is generated according to each difference, obtains the light of measured matter
Spectrum information.
In one embodiment, the spectral information of measured matter includes the frequency corresponding to the characteristic absorption peak of measured matter
Rate, the spectral information of standard items include the frequency corresponding to the characteristic absorption peak of standard items.When processor executes computer program
Also realize following steps：The feature for calculating the frequency corresponding to the characteristic absorption peak of measured matter and the multiple standard items to prestore is inhaled
The difference for receiving the frequency corresponding to peak obtains difference；Differentiate obtain measured matter ingredient include within a preset range difference institute it is right
The standard items answered.
In one embodiment, following steps are also realized when processor executes computer program：Under acquisition of transmission pattern too
Detector received signal when Hertz wave penetrates the sample storing unit for not placing standard items, obtains no sample transmission signal；It adopts
THz wave detector received signal when penetrating the standard items being placed in sample storing unit under collection transmission mode, obtains pair
That answers standard items has sample transmission signal；There is sample transmission signal according to no sample transmission signal and each standard items, obtains respectively
Take the spectral information of corresponding standard items and storage.
In one embodiment, a kind of computer readable storage medium is provided, computer program is stored thereon with, is calculated
Machine program realizes following steps when being executed by processor：
The total reflection signal that detector receives when acquiring THz wave irradiation ATR modules under ATR patterns, obtains with reference to letter
Number；The total reflection signal that detector receives when THz wave irradiation is placed with the ATR modules of measured matter under ATR patterns is obtained,
Obtain detection signal；According to the spectral information of reference signal and detection signal acquisition measured matter；Compare the spectrum of measured matter
The spectral information of information and the multiple standard items to prestore obtains the ingredient of measured matter.
Above computer readable storage medium storing program for executing realizes the above-mentioned material composition discrimination method based on ATR patterns, similarly may be used
Improve the accuracy that material composition differentiates.
In one embodiment, following steps are also realized when computer program is executed by processor：Reference signal is carried out
Fourier transform obtains the first frequency-region signal；Fourier transform is carried out to detection signal and obtains the second frequency-region signal；Compare first
Frequency-region signal and the second frequency-region signal obtain the spectral information of measured matter.
In one embodiment, the first frequency-region signal and the second frequency-region signal are to be as abscissa value, to absorb using frequency
Number is the curve of ordinate value.Following steps are also realized when computer program is executed by processor：Compare first under identical frequency
The difference of absorption coefficient between frequency-region signal and the second frequency-region signal；Absorption spectra is generated according to each difference, obtains measured matter
Spectral information.
In one embodiment, the spectral information of measured matter includes the frequency corresponding to the characteristic absorption peak of measured matter
Rate, the spectral information of standard items include the frequency corresponding to the characteristic absorption peak of standard items.Computer program is executed by processor
When also realize following steps：Calculate the feature of the frequency corresponding to the characteristic absorption peak of measured matter and the multiple standard items to prestore
The difference of frequency corresponding to absorption peak obtains difference；Differentiate that the ingredient for obtaining measured matter includes difference institute within a preset range
Corresponding standard items.
In one embodiment, following steps are also realized when computer program is executed by processor：Under acquisition of transmission pattern
Detector received signal when THz wave penetrates the sample storing unit for not placing standard items, obtains no sample transmission signal；
Detector received signal, obtains when THz wave penetrates the standard items being placed in sample storing unit under acquisition of transmission pattern
Corresponding standard items have sample transmission signal；There is sample transmission signal according to no sample transmission signal and each standard items, respectively
Obtain the spectral information of corresponding standard items and storage.
One of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the computer program can be stored in a non-volatile computer
In read/write memory medium, the computer program is when being executed, it may include such as the flow of the embodiment of above-mentioned each method.Wherein,
Any reference to memory, storage, database or other media used in each embodiment provided herein,
Including non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of above example can be combined arbitrarily, to keep description succinct, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield is all considered to be the range of this specification record.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, under the premise of not departing from the application design, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the protection domain of the application patent should be determined by the appended claims.
Claims (10)
1. a kind of material composition discrimination method based on ATR patterns, the method includes：
The total reflection signal that detector receives when acquiring THz wave irradiation ATR modules under ATR patterns, obtains reference signal；
Obtain the total reflection that detector receives when THz wave irradiation is placed with the ATR modules of measured matter under ATR patterns
Signal obtains detection signal；
According to the spectral information of measured matter described in the reference signal and the detection signal acquisition；
The spectral information of the spectral information and the multiple standard items to prestore that compare the measured matter obtains the measured matter
Ingredient.
2. according to the method described in claim 1, it is characterized in that, described obtain according to the reference signal and the detection signal
The spectral information of the measured matter is taken, including：
Fourier transform is carried out to the reference signal and obtains the first frequency-region signal；
Fourier transform is carried out to the detection signal and obtains the second frequency-region signal；
Compare first frequency-region signal and second frequency-region signal obtains the spectral information of the measured matter.
3. according to the method described in claim 2, it is characterized in that, first frequency-region signal and second frequency-region signal are
Using frequency as abscissa value, using absorption coefficient as the curve of ordinate value；
First frequency-region signal and second frequency-region signal obtain the spectral information of the measured matter, packet
It includes：
Compare the difference of absorption coefficient between first frequency-region signal and second frequency-region signal under identical frequency；
Absorption spectra is generated according to each difference, obtains the spectral information of the measured matter.
4. according to the method described in claim 1, it is characterized in that, the spectral information of the measured matter includes the measured object
Frequency corresponding to the characteristic absorption peak of matter, the spectral informations of the standard items include that the characteristic absorption peak institute of the standard items is right
The frequency answered；
The spectral information of the comparison measured matter and the spectral information of the multiple standard items to prestore obtain the measured object
The ingredient of matter, including：
Calculate the characteristic absorption peak institute of the frequency corresponding to the characteristic absorption peak of the measured matter and the multiple standard items to prestore
The difference of corresponding frequency obtains difference；
The ingredient that discriminating obtains the measured matter includes the standard items corresponding to difference within a preset range.
5. according to the method described in claim 1, it is characterized in that, the spectral information of the comparison measured matter and prestoring
Multiple standard items spectral information obtain the ingredient of the measured matter before, further include：
Detector received signal, obtains when THz wave penetrates the sample storing unit for not placing standard items under acquisition of transmission pattern
To no sample transmission signal；
Detector receives when THz wave penetrates the standard items being placed in the sample storing unit under acquisition of transmission pattern
Signal, obtain corresponding standard items has sample transmission signal；
There is sample transmission signal according to the no sample transmission signal and each standard items, obtains the spectrum of corresponding standard items respectively
Information simultaneously stores.
6. according to the method described in claim 5, it is characterized in that, the standard items are not absorb by pure material and THz wave
Substance according to mass ratio 1:4 substances being mixed to get.
7. a kind of material composition identification device based on ATR patterns, which is characterized in that described device includes：
Reference signal acquisition module, the total reflection that detector receives when for acquiring THz wave irradiation ATR modules under ATR patterns
Signal obtains reference signal；
Signal acquisition module is detected, the ATR modules of measured matter are placed with for obtaining THz wave irradiation under ATR patterns
When detector receive total reflection signal, obtain detection signal；
Spectral information obtaining module, for the spectrum according to measured matter described in the reference signal and the detection signal acquisition
Information；
Comparative analysis module, the spectral information for the spectral information and the multiple standard items to prestore that compare the measured matter obtain
To the ingredient of the measured matter.
8. device according to claim 7, which is characterized in that the spectral information obtaining module includes：
First converter unit obtains the first frequency-region signal for carrying out Fourier transform to the reference signal；
Second converter unit obtains the second frequency-region signal for carrying out Fourier transform to the detection signal；
Frequency-domain analysis unit obtains the measured matter for first frequency-region signal and second frequency-region signal
Spectral information.
9. a kind of computer equipment, including memory and processor, the memory are stored with computer program, feature exists
In when the processor executes the computer program the step of any one of realization claim 1 to 6 the method.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of method according to any one of claims 1 to 6 is realized when being executed by processor.
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| CN201810118596.3A CN108344715A (en) | 2018-02-06 | 2018-02-06 | Material composition discrimination method, device and computer equipment based on ATR patterns |
| PCT/CN2018/081192 WO2019153460A1 (en) | 2018-02-06 | 2018-03-29 | Atr mode-based material composition identification method, device, and computer apparatus |
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