CN106770346A - One kind is based on near-infrared diffusing transmission solids on-line detecting system - Google Patents
One kind is based on near-infrared diffusing transmission solids on-line detecting system Download PDFInfo
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- CN106770346A CN106770346A CN201611077617.9A CN201611077617A CN106770346A CN 106770346 A CN106770346 A CN 106770346A CN 201611077617 A CN201611077617 A CN 201611077617A CN 106770346 A CN106770346 A CN 106770346A
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- sample
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- near infrared
- solids
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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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
Abstract
The present invention provides a kind of based on near-infrared diffusing transmission solids on-line detecting system, including：Sample conveyance system, light-source system and near infrared detection system.Sample conveyance system includes two conveyer belts and a set of rotary shaft, two conveyer belts share same set of rotary shaft, there is certain gap between two conveyer belts, sample is transmitted by two conveyer belts,, respectively positioned at the both sides of Transmission system, the near infrared light that light-source system sends produces the near infrared spectrum corresponding to sample by the gap irradiating sample between two conveyer belts for light-source system and near infrared detection system, the tested examining system detection of near infrared spectrum and analysis, finally give the content of each composition in counter sample.The advantage of the invention is that：Realize lossless audio coding of the sample in transmitting procedure.
Description
Technical field
The present invention relates to near-infrared diffusing transmission on-line checking field, specifically using near-infrared diffusing transmission technology to sample
Product carry out on-line checking.
Background technology
Near infrared spectrum and Raman spectroscopy in Optical characteristics method can carry out nondestructive analysis to sample, with survey
Test agent is untouchable, non-destructive, the features such as detection sensitivity is high, the time is short, sample aequum is small and sample need not be prepared,
Chemistry, machinery, photochemistry and heat decomposition will not be caused to sample during analysis, is the research in analysis science field
One of focus.Near-infrared spectrum technique achieves larger progress in the industry such as agricultural, medicine, food in recent years, both at home and abroad
There is nearly infrared reflectance spectroscopy technology to be applied to the research in the fields such as agricultural, chemical industry.Near infrared light (NIR) refers to that wavelength exists
(wave number is 12820cm to 780~2526nm-1~3959cm-1) in the range of electromagnetic wave, between visible ray (VIS) and mid-infrared light
(MIR) between, Near-infrared Spectral Absorption is that molecular vibrational energy order transition produces (with the transition of rotational energy level), and molecule shakes
Kinetic energy order transition includes fundamental transition, frequency multiplication transition and sum of fundamental frequencies transition.The near infrared light that light source sends is to by group of molecules
Into material on, if there is vibrational state change or jump of the vibrational state between different energy levels in the energy of molecule absorption near infrared light
The energy equal to photon near infrared spectrum wavelength is moved, then can produce Near-infrared Spectral Absorption.In near infrared spectral range
Interior, the frequency multiplication and sum of fundamental frequencies of X-H containing hydrogen functional group (X=C, N, O, S etc.) vibrations absorb in the mainly molecule of measurement.The technology
Have the advantages that easily and fast, efficiently, accurately, cost is relatively low, do not destroy sample, chemical reagent is not consumed, free from environmental pollution,
Compared with common detection methods, on-line checking is more suitable for.
Because near-infrared diffusing transmission technical requirements light-source system and detection system are to be located at sample both sides respectively, so typically
On-line checking and analysis are seldom carried out to solid sample using near-infrared diffusing transmission technology.
The content of the invention
The present invention is provided one kind and can realize carrying out solid sample on a moving belt using near-infrared diffusing transmission technology
Line measuring system, can not only realize being corrected the position of sample, but also can realize that sample is carried out in transmission belt
Detection.The system is applied to carries out online near-infrared diffusing transmission measurement to solid granulates sample.
The present invention is to be achieved through the following technical solutions above-mentioned technical purpose：One kind is based on near-infrared diffusing transmission solids
On-line detecting system, including：Sample conveyance system, light-source system and near infrared detection system；
Sample conveyance system includes：Interior conveyer belt (12), outer conveyor (12 '), the first rotary shaft (13), and second turn
Moving axis (13 '), interior conveyer belt (12) and outer conveyor (12 ') be enclosed within positioned at and internal two ends the first rotary shaft (13) and
In second rotary shaft (13 '), there is certain gap between interior conveyer belt (12) and outer conveyor (12 '), sample (6) is positioned at interior biography
Band (12) or outer conveyor (12 ') top are sent, two transmission drive with identical rotary shaft, it is ensured that two shiftings of conveyer belt
Dynamic speed is identical；
Light-source system includes light source (10), power supply (11), collimation lens (9) and slit (8), light source (10), collimation lens
(9) it is arranged on inside interior conveyer belt (12) with slit (8), power supply (11) powers to light source (10)；
Near infrared detection system includes transmitter (19), detector (7), collecting lens (5), spectrometer (2) and micro- place
Reason device (1), transmitter (19) and detector (7) are oppositely arranged respectively positioned at the both sides of sample (6) transmission direction；
The signal of transmitter (19) transmitting is stopped that change the signal of detector (7), detector (7) sends by sample (6)
Signal triggers spectrometer (2) and is detected, and light source (10) is sent near infrared light (14) and collimated by collimation lens (9), Ran Houjing
Cross slit (8) and change near infrared light (14) beam size, make mutual of slit between beam size and two conveyer belts (12,12 ')
Match somebody with somebody, near infrared light (14) produces near infrared spectrum (15) by slit irradiating sample (6), near infrared spectrum (15) is saturating by collecting
Mirror (5) is analyzed coupled to spectrometer (2), microprocessor (1) near infrared spectrum (15).
As the technical scheme of optimization, sample position should also be included based on near-infrared diffusing transmission solids on-line detecting system
Correction system, sample (6) is located at interior conveyer belt (12) or outer conveyor (12 ') top positioned at correction system, including is located at respectively
First correction fixed mount (16) and the second correction fixed mount (16 ') of sample (6) direction of transfer both sides, the first correction fixed mount
(16) inner side interlocks and is provided with the first correction tooth (17) and the first correction paddy (18), the interior top-cross of the second correction fixed mount (16 ')
Mistake is provided with the top of the second correction tooth (17 ') and the second correction paddy (18 '), the first correction tooth (17) and the second correction tooth (17 ')
The distance between it is related to sample (6), first correction tooth (17) and second correction tooth (17 ') top formation straight line between away from
From the size more than sample (6), less than the size of conveyer belt where sample (6).
Used as the technical scheme of optimization, the first correction tooth (17) and second corrects tooth (17 ') parabolically type, and correction paddy is
The groove formed between the correction tooth of two adjacent settings separated by a distance.
Used as the technical scheme of optimization, the first correction tooth (17) and second corrects tooth (17 ') and staggers installation.
Used as the technical scheme of optimization, light-source system also includes the optical fiber head (4) and optical fiber (3) that are connected, the optical fiber
Head (4) is connected with collecting lens (5), and optical fiber (3) other end is connected with spectrometer (2), and near infrared spectrum (15) is saturating by collecting
Mirror (5) and optical fiber head (4) are transmitted to spectrometer (2) coupled to optical fiber (3) by optical fiber (3).
Used as the technical scheme of optimization, transmitter (19) and detector (7) are separately fixed at the first correction fixed mount (16)
In the second correction fixed mount (16 ').
The near infrared detection system, can both be transmitted to spectrometer (2) spectral signal by optical fiber (3), it is also possible to no
Using optical fiber, spectral signal is directly coupled to spectrometer (2).
As the technical scheme of optimization, light-source system and near infrared detection system, both in conveyer belt (12,12 ') two
The position of side can intermodulation.
Used as the technical scheme of optimization, slit (8) is positioned at collimation lens (9) front, the size of slit (8) and two transmission
Gap between band (12,12 ') is relevant.
It is of the invention compared with prior art, have the advantages that：
For a kind of research based on near-infrared diffusing transmission solids on-line detecting system, the present invention provides one kind can be real
Now to solid particulate matter sample on-line detecting system, the automatic correction of sample position is realized, be to use near-infrared spectrum technique
Carry out being accurately positioned a kind of measurement means of offer.Light-source system uses slit, realizes accurate irradiation of the light source to sample, while
Reduce influence of the other factorses to spectrum.The invention employs two coaxial conveyer belts, by gap between the two to sample
Product are detected, realize the on-line checking of the near-infrared diffusing transmission of sample.It is unrestrained saturating that the implementation of the invention can widen near-infrared
Penetrate on-line checking range of application.
Brief description of the drawings
Fig. 1 is based on near-infrared diffusing transmission solids on-line detecting system schematic diagram for the present invention is a kind of；
Fig. 2 is based on near-infrared diffusing transmission solids on-line detecting system principle auxiliary view for a kind of；
Fig. 3 corrects systematic schematic diagram for a kind of based on near-infrared diffusing transmission solids on-line detecting system；
Fig. 4 is a kind of near infrared spectrum that paddy rice is gathered based on near-infrared diffusing transmission solids on-line detecting system；
Fig. 5 is a kind of near infrared spectrum that corn is gathered based on near-infrared diffusing transmission solids on-line detecting system；
Fig. 6 is a kind of near infrared light that norfloxacin capsule is gathered based on near-infrared diffusing transmission solids on-line detecting system
Spectrum
Fig. 7 is a kind of near infrared spectrum that soybean is gathered based on near-infrared diffusing transmission solids on-line detecting system；
Specific embodiment
To make have a better understanding and awareness to architectural feature of the invention and the effect reached, to preferably
Embodiment and accompanying drawing coordinate detailed description, are described as follows：
One kind that the present invention is provided can realize that sample is examined online based on near-infrared diffusing transmission solids on-line detecting system
Survey case.
As shown in Figure 1, Figure 2 and Figure 3, it is a kind of based on near-infrared diffusing transmission solids on-line detecting system, including：Sample is passed
Send system, sample position correction system, light-source system and near infrared detection system.
Sample conveyance system includes：Interior conveyer belt 12, outer conveyor 12 ', the first rotary shaft 13, and the second rotary shaft
13 ', interior conveyer belt 12 and outer conveyor 12 ' be enclosed within positioned at and internal two ends the first rotary shaft 13 and the second rotary shaft
On 13 ', there is certain gap between interior conveyer belt 12 and outer conveyor 12 ', the size in gap is relevant with sample size.
Sample position correction system is located at interior conveyer belt 12 and the top of outer conveyor 12 ', including transmits positioned at sample 6 respectively
The first correction correction fixed mount 16 ' of fixed mount 16 and second of direction both sides, the inner side of the first correction fixed mount 16 interlocks and is provided with
The first correction correction paddy 18 of tooth 17 and first, the inner side of the second correction fixed mount 16 ' interlocks and is provided with the second correction tooth 17 ' and second
Correction paddy 18 ', the first correction tooth 17 and second corrects the parabolically type of tooth 17 ', and correction paddy is that adjacent two are separated by a spacing
The groove formed between the correction tooth for setting.The first correction correction tooth 17 ' of tooth 17 and second staggers installation.First correction tooth 17
Top with the second correction tooth 17 ' forms size of the distance between the straight line more than sample 6, less than the place conveyer belt of sample 6
The distance between size, i.e., the top of the first correction correction tooth 17 ' of tooth 17 and second are relevant with the size of sample 6.It is of course also possible to
The top of the first correction correction tooth 17 ' of tooth 17 and second forms the size that the distance between straight line is only more than the most narrow place of sample 6
And it is less than the size of the widest part of sample 6 such that it is able to sample 6 is adjusted to best transmission route.
Sample 6 is located at conveyer belt 12 or 12 ' top, by conveyer belt 12 or 12 ' and movement is driven, when sample 6 deviates centre
During position, sample 6 can contact with each other with the first correction correction tooth 17 ' of tooth 17 or second, by the first correction tooth 17 and second school
The correction several times of commutating tooth 17 ', makes sample 6 along middle location transmission.
Light-source system includes light source 10, power supply 11, collimation lens 9 and slit 8, and light source 10, collimation lens 9 and slit 8 set
Put inside interior conveyer belt 12, power supply 11 is powered to light source 10, convenient placement anywhere can be located at.Light source 10 sends closely
Infrared light 14 is collimated by collimation lens 9, then by slit 8 change the beam size of near infrared light 14, make beam size with it is interior
Slit is mutually matched between conveyer belt 12 and outer conveyor 12 '.The size of slit 8 is relevant with the gap of two conveyer belts, it is ensured that to the greatest extent
The many near infrared lights 14 of amount, while preventing near infrared light 14 from irradiating conveyer belt, can influence sample 6 by the irradiating sample 6 of slit 8
Spectrum.
Near infrared detection system includes transmitter 19, detector 7, collecting lens 5, optical fiber head 4, optical fiber 3, spectrometer 2, with
And microprocessor 1.Transmitter 19 and detector 7 are oppositely arranged respectively positioned at the both sides of the transmission direction of sample 6.The present embodiment
In, transmitter 19 and detector 7 are separately fixed on the first correction fixed mount 16 and the second correction fixed mount 16 '.Collecting lens
5th, optical fiber head 4, optical fiber 3, spectrometer 2, and microprocessor 1 are sequentially connected.And slit 8 is located at the underface of collecting lens 5.
On the direct of travel of sample 6, the set location of slit 8 and collecting lens 5 is located at the front of transmitter 19 and detector 7.
The step of being detected using the detecting system is as follows：
Light source 10 is sent near infrared light 14 and is collimated by collimation lens 9, then changes the light beam of near infrared light 14 by slit 8
Size, makes beam size and two conveyer belts 12, and slit is mutually matched between 12 ', and sample 6 is moved to near-infrared and examines along centre position
During examining system, the signal of the transmitting of transmitter 19 is stopped by sample 6, changes the signal of detector 7, and the sending signal of detector 7 is touched
Luminous spectrometer 2 is detected.Near infrared light 14 produces near infrared spectrum 15, near infrared spectrum 15 to pass through by slit irradiating sample 6
Collecting lens 5 and optical fiber head 4 are crossed coupled to optical fiber 3, being transmitted to spectrometer 2 by optical fiber 3 carries out light splitting and detection, it is also possible to straight
Collecting lens 5 was connected coupled to spectrometer 2.The spectral analysis software of last microprocessor 1 is divided near infrared spectrum 15
Analysis.
It is below the near infrared spectrum using automatic correcting probe detection paddy rice, soybean and corn.
The detection process of the present embodiment is：Two conveyer belts 12 that the implementation case is used, 12 ' single width are 1cm's
Belt is constituted, and two conveyer belts 12,12 ' are by common rotary shaft 13 and 13 ', a diameter of 1.5cm of rotary shaft 13 and 13 '.Two
The spacing of conveyer belt 12,12 ' is relevant with sample 6, is 2mm, corn and promise fluorine for the spacing of two conveyer belts of paddy rice 12,12 '
Husky star capsule is 5mm, and soybean is 6mm.Sample two sets of correction systems a width of 8mm, a length of 20cm.The correction tooth 17 of correction system,
17 ' are presented parabolic type with correction paddy 18,18 ', and 5 correction teeth 17,17 ', the position of a set of correction tooth 17,17 ' are employed altogether
Position with another set of correction paddy 18,18 ' is corresponding.Sample position correction system is located at directly over two conveyer belts 12,12 ',
Top is fixed on by correcting fixed mount 16,16 ', fixed mount 16,16 ' can adjust two sets of distances of correction system.Sample (water
Rice, corn, norfloxacin capsule or soybean) 6 by conveyer belt 12,12 ' drive movement, when sample 6 deviate centre position when,
Sample 6 can contact with each other and correct with correction tooth 17,17 ', by correcting the correction several times of tooth 17,17 ', make sample 6 along centre
Location transmission, when sample 6 is detected along centre position movement by photodetector 7, the sending signal of detector 7 triggering Fourier's light
Spectrometer 2 is detected.
The power of light source 10 that light-source system is used is the halogen tungsten lamp of 6W, and then by diameter 15mm, focal length is double for 20mm's
Convex collimation lens 9 is collimated, and near infrared light 14 changes beam size, beam size and two conveyer belts 12,12 ' by slit 8
Spacing it is relevant, the slit that paddy rice uses is 15mm long, 1.4mm wide；Corn uses 15mm long, the slit of 4.9mm wide；Soybean is adopted
Use 15mm long, the slit of 5.9mm wide.Near infrared light 14 produces corresponding near infrared spectrum 15 by slit irradiating sample 6, near red
External spectrum 15 is coupled to optical fiber 3 by diameter 20mm, the collecting lens 5 of focal length 30mm and the optical fiber head 4 of SMA905, by optical fiber
3 transmit to Fourier spectrometer 2 and are detected.The spectral analysis software of last microprocessor 1 is divided near infrared spectrum 15
Analysis.The diffusing transmission spectrum of collection paddy rice, corn, norfloxacin capsule and soybean is as shown in Figure 4, Figure 5, Figure 6 and Figure 7.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
General principle of the invention, principal character and advantages of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not limited to the above embodiments, the simply present invention described in above-described embodiment and specification
Principle, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these change and
Improvement is both fallen within the range of claimed invention.The protection domain of application claims by appending claims and its
Equivalent is defined.
Claims (8)
- It is 1. a kind of to be based on near-infrared diffusing transmission solids on-line detecting system, it is characterised in that：Including：Sample conveyance system, light Origin system and near infrared detection system；Sample conveyance system includes：Interior conveyer belt (12), outer conveyor (12), the first rotary shaft (13), and the second rotary shaft (13), interior conveyer belt (12) and outer conveyor (12) are enclosed within first rotary shaft (13) and second at two ends on its interior In rotary shaft (13), there is certain gap between interior conveyer belt (12) and outer conveyor (12), sample (6) is positioned at interior conveyer belt (12) or above outer conveyor (12)；Light-source system include light source (10), power supply (11), collimation lens (9) and slit (8), light source (10), collimation lens (9) and Slit (8) is arranged on interior conveyer belt (12) inside, and power supply (11) powers to light source (10)；Near infrared detection system includes transmitter (19), detector (7), collecting lens (5), spectrometer (2) and microprocessor (1), transmitter (19) and detector (7) are respectively positioned at the both sides of sample (6) transmission direction, and are oppositely arranged；The signal of transmitter (19) transmitting changes the signal of detector (7), detector (7) sending signal by sample (6) stop Triggering spectrometer (2) is detected, and light source (10) is sent near infrared light (14) and collimated by collimation lens (9), then by narrow Seam (8) changes near infrared light (14) beam size, is mutually matched slit between beam size and two conveyer belts (12,12), closely Infrared light (14) produces near infrared spectrum (15) by slit irradiating sample (6), and near infrared spectrum (15) is by collecting lens (5) Coupled to spectrometer (2), microprocessor (1) is analyzed near infrared spectrum (15).
- 2. according to claim 1 a kind of based on near-infrared diffusing transmission solids on-line detecting system, it is characterised in that：Also System is corrected including sample position, sample position correction system is located at interior conveyer belt (12) or outer conveyor (12) top, including Respectively positioned at first correction fixed mount (16) and the second correction fixed mount (16) of sample (6) direction of transfer both sides, the first correction The inner side of fixed mount (16) interlocks and is provided with the first correction tooth (17) and the first correction paddy (18), the second correction fixed mount (16) Inner side interlocks and is provided with the second correction tooth (17) and the second correction paddy (18), the first correction tooth (17) and the second correction tooth (17) Top form the size of the distance between straight line more than sample (6), less than the size of conveyer belt where sample (6).
- 3. according to claim 2 a kind of based on near-infrared diffusing transmission solids on-line detecting system, it is characterised in that：The One correction tooth (17) and second corrects tooth (17) parabolically type, and correction paddy is two adjacent settings separated by a distance The groove formed between correction tooth.
- 4. according to claim 2 a kind of based on near-infrared diffusing transmission solids on-line detecting system, it is characterised in that：The One correction tooth (17) and second corrects tooth (17) and staggers installation.
- 5. according to claim 1 a kind of based on near-infrared diffusing transmission solids on-line detecting system, it is characterised in that：Light Origin system also includes the optical fiber head (4) and optical fiber (3) that are connected, and the optical fiber head (4) is connected with collecting lens (5), optical fiber (3) The other end is connected with spectrometer (2), near infrared spectrum (15) by collecting lens (5) and optical fiber head (4) coupled to optical fiber (3), Transmitted to spectrometer (2) by optical fiber (3).
- 6. according to claim 2 a kind of based on near-infrared diffusing transmission solids on-line detecting system, it is characterised in that：Hair Emitter (19) and detector (7) are separately fixed on the first correction fixed mount (16) and the second correction fixed mount (16).
- 7. according to claim 1 a kind of based on near-infrared diffusing transmission solids on-line detecting system, it is characterised in that：Institute The light-source system and near infrared detection system stated, both position energy in interior conveyer belt (12) and the both sides of outer conveyor (12) Enough intermodulation.
- 8. according to claim 1 a kind of based on near-infrared diffusing transmission solids on-line detecting system, it is characterised in that：Institute The slit (8) stated is positioned at collimation lens (9) front.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611077617.9A CN106770346B (en) | 2016-11-29 | 2016-11-29 | One kind being based on near-infrared diffusing transmission solids on-line detecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611077617.9A CN106770346B (en) | 2016-11-29 | 2016-11-29 | One kind being based on near-infrared diffusing transmission solids on-line detecting system |
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| CN106770346B CN106770346B (en) | 2019-10-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111024630A (en) * | 2019-11-20 | 2020-04-17 | 大连民族大学 | Portable visible absorption spectrometer |
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| JP2002039940A (en) * | 2000-07-21 | 2002-02-06 | Techno Ishii:Kk | Method and apparatus for detection of turning into cavitation in specimen |
| CN2615660Y (en) * | 2003-04-01 | 2004-05-12 | 中国农业机械化科学研究院 | Diffuse transmission measuring device for near infrared grain quality analysis instrument |
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| CN111024630A (en) * | 2019-11-20 | 2020-04-17 | 大连民族大学 | Portable visible absorption spectrometer |
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| CN106770346B (en) | 2019-10-22 |
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