CN108801976A - A kind of detecting system for the near infrared light source apparatus of simple grain grain quality detection and based on the device - Google Patents
A kind of detecting system for the near infrared light source apparatus of simple grain grain quality detection and based on the device Download PDFInfo
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- CN108801976A CN108801976A CN201810990948.4A CN201810990948A CN108801976A CN 108801976 A CN108801976 A CN 108801976A CN 201810990948 A CN201810990948 A CN 201810990948A CN 108801976 A CN108801976 A CN 108801976A
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- 230000033001 locomotion Effects 0.000 claims abstract description 4
- 239000013307 optical fiber Substances 0.000 claims description 64
- 239000000523 sample Substances 0.000 claims description 33
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 24
- 238000009434 installation Methods 0.000 claims description 22
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 5
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Classifications
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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
- G01N21/17—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
- G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- Spectroscopy & Molecular Physics (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of near infrared light source apparatus for the detection of simple grain grain quality, which includes light bulb, cover, top base, bottom base, conduction copper column, the miniature lamp beads of LED, conductive plate and insulation board etc..The external spectrometer of device cooperation completes the acquisition of cereal near infrared spectrum data, and the specific movement flow of cereal in a device is：Cereal enters device by top base slideway mouth, by the glass pipe inside light bulb, from bottom base slideway slide out device.The present invention also provides the detecting systems based on the device, the intensity signal of spectrometer collection to diffuse is converted into absorbance and is pre-processed, the quality parameter of simple grain cereal is predicted in real time based on prediction model, the device of the invention can meet the needs of cereal high throughput Quality Detection, have the characteristics that simultaneously delicate structure, performance it is stable, to cereal non-destructive testing, it can be achieved that high-throughput quality parameter on-line checking.
Description
Technical field
The invention belongs to quality of agricultural product detection technique fields, are related to grain quality detection, more particularly to a kind of for single
The near infrared light source apparatus of grain grain quality detection and the detecting system based on the device.
Background technology
Grain quality parameter is the important parameter of bread crop breeding, food processing, food quality assessment, detection device
Using the labor intensity that can reduce the mankind, working efficiency is improved.Existing grain quality detection device volume is larger, it is complicated,
Cost of manufacture is high, and is to carry out destructive detection to cereal mostly.
Invention content
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide one kind examines for simple grain grain quality
The near infrared light source apparatus of survey and detecting system based on the device, it is simple in structure, and can realize that efficient simple grain cereal is lossless
Detection.
To achieve the goals above, the technical solution adopted by the present invention is：
A kind of near infrared light source apparatus for the detection of simple grain grain quality, including light bulb 5 are provided as inside light bulb 5
The stack shell 10 of the transparent glass pipeline of cereal motion path, light bulb 5 is provided with the miniature lamp bead mounting holes 11 of several LED, and each LED is micro-
One LED miniature lamp beads 4 are installed, top base 1 is arranged in one end of the light bulb 5, under other end setting in type lamp bead mounting hole 11
Pedestal 8, the top base 1 offer inclined top base slideway 24, and the bottom base 8 offers inclined bottom base slideway
31, cereal enters along 24 arrival end of top base slideway, enters the transparent glass pipeline in light bulb 5 from outlet end, then along bottom base
Slideway 31 skids off, wherein be provided in top base 1 for install act on top base slideway 24 upper diffusing reflection optical fiber it is upper unrestrained
Mirror based fiber optica mounting hole 27 and for install the photoelectric detection probe for acting on top base slideway 24 photoelectric detection probe install
Hole 25 is provided with the lower diffusing reflection optical fiber for installing the lower diffusing reflection optical fiber for acting on bottom base slideway 31 in bottom base 8 and pacifies
Fill hole 29.
The stack shell 10 is provided with m rows n and arranges the evenly arranged miniature lamp bead mounting holes 11 of LED, is arranged in the light bulb 5 useful
In the cooling duct 15 of logical cooling water, cooling duct 15 is serpentine-like to be distributed between the miniature lamp beads of every two row LED 4.
One end of the light bulb 5 is provided with the cover 2 of centre bore, and cover 2 connects top base 1, centre bore and top base
The outlet end of slideway 24 is connected to.
Around several conduction copper columns 3 consistent with stack shell length direction are distributed with outside the stack shell 10 of the light bulb 5, LED is micro-
The anode of type lamp bead 4 is connected on the conduction copper column 3 of positive pole, and cathode is connected on the conduction copper column 3 of power cathode, is formed
Access.
The other end of the light bulb 5 is provided with a support 12, and the conduction copper column 3 is mounted on the conductive plate 6 of annular, conductive
Plate 6 is sleeved on stack shell 10, including is welded with the inner ring and outer ring of inner ring scolding tin 34 and outer ring scolding tin 35 respectively, the inner ring scolding tin 34
It is connected respectively with one end interval of conduction copper column 3 with outer ring scolding tin 35 so that adjacent conduction copper column 3 connects the positive and negative of power supply respectively
Pole.
The conductive plate 6 has two pieces or one piece, when for two pieces, when for two pieces, is separately positioned on the two of light bulb 5
A support 12 and cover 2 are close in end across insulation board 7, and the outer rings of two pieces of conductive plates 6 connects positive pole or cathode, two pieces
Inner ring connect the cathode or anode of power supply, the both ends of the same root conduction copper column 3 of two pieces of conductive plates 6 are connected to two pieces
On the outer ring scolding tin 35 of the inner ring scolding tin 34 of conductive plate 6 or two pieces of conductive plates 6；When for one piece, be arranged in one end of light bulb 5 or
Person's other end is close to a support 12 or cover 2 across insulation board 7, and outer ring connects positive pole or cathode, and inner ring connects the negative of power supply
Pole or anode.
The insulation board 7 is annulus shape, adopts and is made from an insulative material, consistent with the quantity of conductive plate 6, playing will be conductive
The effect that copper post 3 and light bulb 5 are isolated in 5 both ends conduction of light bulb, wherein if insulation board 7, in 2 one end of cover, insulation board 7 is provided with
Two for the through-hole 36 across conduction copper column 3, wherein is separately connected two conductive coppers of LED miniature lamp bead 4 anode and cathode
Column 3 reaches outside cover 2, and for being directly connected to positive pole and cathode, and conduction copper column 3 passes through conductive plate 6 and cover 2
Portion envelops one piece of ambroin set.
The top base 1 is additionally provided with the 4th threaded hole 26, and the upper diffusing reflection optical fiber mounting hole 27 is with cover 2 with one
On axis, and it is concentric with the arrival end of top base slideway 24, wherein installing diffusing reflection optical fiber, the 4th threaded hole 26 is overflow with upper
The intersection of 27 axis of mounting hole is reflected, the screw of the 4th threaded hole 26 installation is for fixed upper diffusing reflection optical fiber, the Photoelectric Detection
Probe mounting holes 25 intersect with upper diffusing reflection optical fiber mounting hole 27, wherein installing photoelectric detection probe；The bottom base 8 is also set up
There is the 5th threaded hole 28, lower diffusing reflection optical fiber mounting hole 29 is concentric with 31 outlet end of bottom base slideway, and with light bulb 5 with one
On axis, for installing lower diffusing reflection optical fiber, the 5th threaded hole 28 intersects with lower 29 axis of diffusing reflection optical fiber mounting hole, the
The screw of five threaded holes 28 installation is for fixed lower diffusing reflection optical fiber；For being mounted on light bulb 5 there are two being opened up on the cover 2
On cover mounting hole 19, open up that there are two the top base mounting hole 23 for being mounted on cover 2, institutes on the top base 1
It states and is opened up on bottom base 8 there are two the bottom base mounting hole 30 for being mounted in light bulb 5, installation screw head is hidden in flat
Under face
The transparent glass pipeline internal diameter is equal with top base slideway 24,31 internal diameter of bottom base slideway, the transparent glass
Pipeline is located at upper diffusing reflection optical fiber mounting hole 27 and lower diffusing reflection optical fiber mounting hole 29 on same axis, makes the upper and lower unrestrained of installation
Mirror based fiber optica is formed to penetrating.
The present invention also provides a kind of detections based on the near infrared light source apparatus for the detection of simple grain grain quality
System, which is characterized in that including：
Upper diffusing reflection optical fiber is set to the upper diffusing reflection optical fiber mounting hole 27；
Lower diffusing reflection optical fiber is set to the lower diffusing reflection optical fiber mounting hole 29, and acquisition light is formed with upper diffusing reflection optical fiber
It is fine；
Spectrometer connects the upper diffusing reflection optical fiber and lower diffusing reflection optical fiber, receives the simple grain cereal kernel of its acquisition in lamp
Diffusing in cylinder 5；
The intensity signal of spectrometer collection to diffuse is converted into absorbance and pre-processed, base by processing unit
The quality parameter of simple grain cereal is predicted in real time in prediction model, while real-time to the curve of spectrum and prediction result of sample
Display.
Compared with prior art, the present invention can meet the needs of cereal high throughput Quality Detection, while have delicate structure,
The characteristics of performance is stable, to cereal non-destructive testing.
Description of the drawings
Fig. 1 is the graphics of the present invention.
Fig. 2 is the graphics of light bulb of the present invention.
Fig. 3 is the vertical view of light bulb of the present invention.
Fig. 4 is the revolved sectional view in Fig. 3 in the direction of the arrow.
Fig. 5 is the light bulb front view of light bulb of the present invention.
Fig. 6 is the sectional view in Fig. 5 in the direction of the arrow.
Fig. 7 is the light bulb front view of light bulb of the present invention.
Fig. 8 is the sectional view in Fig. 7 in the direction of the arrow.
Fig. 9 is the graphics of cover of the present invention.
Figure 10 is the front view of cover of the present invention.
Figure 11 is the vertical view of cover of the present invention.
Figure 12 is the graphics of top base of the present invention.
Figure 13 is the front view of top base of the present invention.
Figure 14 is the vertical view of top base of the present invention.
Figure 15 is the left view of top base of the present invention.
Figure 16 is the graphics of bottom base of the present invention.
Figure 17 is the front view of bottom base of the present invention.
Figure 18 is the vertical view of bottom base of the present invention.
Figure 19 is the left view of bottom base of the present invention.
Figure 20 is the graphics of conductive plate of the present invention.
Figure 21 is the graphics of insulation board of the present invention.
Figure 22 is detecting system software function module figure of the present invention.
Figure 23 is that the characteristic wavelength of SPA algorithms of the present invention selects distribution map.
Figure 24 is that the present invention is based on the actual measurements of the Protein Content in Wheat of characteristic wavelength and predicted value comparison schematic diagram.
Figure 25 is the error rod figure on each wavelength of reference spectra of the present invention.
Figure 26 is absorbance standard difference and error line schematic diagram on each wavelength of the present invention.
In attached drawing, the meaning representated by each label is：
1-top base, 2-covers, 3-conduction copper columns, the miniature lamp beads of 4-LED, 5-light bulbs, 6-conductive plates, 7-absolutely
Listrium, 8-bottom bases, the 9-the first threaded hole, 10-stack shells, the miniature lamp bead mounting holes of 11-LED, 12-cylinder supports, 13-is cooling
Road water inlet, 14-cooling duct water outlets, 15-cooling ducts, the 16-the first connecting hole, the 17-the second threaded hole, 18-the second connects
Connect hole, 19-cover mounting holes, 20-protrusion annulus, 21-first through hole, 22-third threaded holes, the installation of 23-top bases
Hole, 24-top base slideways, 25-photoelectric detection probe mounting holes, the 26-the four threaded hole, 27-upper diffusing reflection mounting holes,
28-the five threaded hole, 29-lower diffusing reflection optical fiber mounting holes, 30-bottom base mounting holes, 31-bottom base slideways, 32-the
Six threaded holes, the 33-the second through-hole, 34-inner ring scolding tin, 35-outer ring scolding tin, 36-third through-holes.
Specific implementation mode
The principle and features of the present invention will be described below with reference to the accompanying drawings, and example is served only for the solution present invention, not
For limiting the scope of the present invention.
Refering to fig. 1 shown in-Figure 21, a kind of near infrared light source apparatus for the detection of simple grain grain quality of the present invention, including
Following several parts：
I, light bulb component：With reference to shown in figure 2- Fig. 8, light bulb 5 is mainly made of stack shell 10 and 12 two parts of cylinder support, stack shell 10
It is in hollow cylindric with cylinder support 12, internal diameter 23mm, the outer diameter 31mm of stack shell 10, cylinder support 12 are located at the rear end of stack shell 10,
Diameter is bigger than the diameter of stack shell 10, and the inner ring of cylinder support 12 is less than the inner ring of stack shell 10, and cereal movement is provided as inside stack shell 10
The transparent glass pipeline in path, transparent glass pipeline diameter about 12mm, using high-purity borosilicate glass tube.6 are offered on barrel
The miniature lamp bead mounting holes 11 of LED for installing the miniature lamp beads of LED 4 that row 8 arranges, whens LED miniature 4 electrified light emittings of lamp bead, can pass through
Transparent glass pipeline impinge upon by cereal on.Light bulb 5 is opened up far from 12 one end of support there are two the first threaded hole 9, the two
First threaded hole 9 is used to install cover 2 by screw, there is a cooling duct 15 for being used to lead to cooling water in light bulb 5, cooling duct into
The mouth of a river 13 and cooling duct water outlet 14 are both designed as threaded hole on 12 edge of cylinder support, facilitate installation cooling water pipe, cooling
Road 15 is serpentine-like to be distributed in 10 wall of stack shell, and cooling duct 15 is distributed between the miniature lamp beads of every two row LED 4, with the first connecting hole
16 and second connecting hole 18 join end to end to form 15 access of cooling duct, so that it is guaranteed that the cooling to entire light bulb.Cylinder support 12
Bottom is opened up there are two the second threaded hole 17, the two second threaded holes 17 are used to install bottom base 8 by screw.
II, cover component：With reference to shown in figure 9- Figure 11, cover 2 has protrusion annulus 20, protrusion annulus in annular shape, inner ring
20 for fixing transparent glass pipeline, while having the function of facilitating and installing cover 2 and the cooperation of light bulb 5, the annulus hole at center
Hole is connected to the outlet end of top base slideway 24.Cover mounting hole there are two being opened up on cover 2 for being mounted in light bulb 5
19, two third threaded holes 22 for installing top base, two for the first through hole 21 across conduction copper column, two covers
Mounting hole 19 is coordinated with the first threaded hole 9 by screw respectively, and cover 2 is made to be installed in light bulb 5, and ensures cover 2 and light bulb 5
With on an axis, cover mounting hole 19 is stepped shape, it is therefore an objective to which installation screw head is hidden under cover plane.
III, top base component：With reference to shown in figure 12- Figure 15, top base 1 in a rectangular parallelepiped shape, is set to the front end of light bulb 5,
It opens up there are two the top base mounting hole 23 for being mounted on cover 2, top base mounting hole 23 is stepped shape, it is therefore an objective to will
Installation screw head is hidden under 1 plane of top base, and top base 1 opens up a upper diffusing reflection optical fiber mounting hole 27, is overflow on this anti-
Optical fiber mounting hole 27 is penetrated with cover 2 on an axis, 1 side of top base opens up the 4th threaded hole 26, the 4th screw thread
Hole 26 is intersected with upper 27 axis of diffusing reflection mounting hole, and the screw of the 4th threaded hole 26 installation is used for fixed upper diffusing reflection optical fiber, on
Pedestal 1 has opened up an inclined top base slideway 24, and 24 one end of top base slideway and upper diffusing reflection mounting hole 27 are concentric, should
Top base slideway 24 enters the entrance of the present apparatus as cereal, in addition, 1 side of top base opens up a photoelectric detection probe installation
Hole 25, the photoelectric detection probe mounting hole 25 pass through top base slideway 24, are slided from top base with reaching photoelectric detection probe detection
Road 24 by cereal purpose.Photoelectric detection probe can be used high sensitivity optical fiber infrared emission sensor (model FV-V11,
Hundred million is rich, China).
IV, bottom base component：With reference to shown in figure 16- Figure 19, bottom base 8 in a rectangular parallelepiped shape, is set to the rear end of light bulb 5,
It opens up there are two the bottom base mounting hole 30 for being mounted in light bulb 5, bottom base mounting hole 30 is stepped shape, it is therefore an objective to will
Installation screw head is hidden under 8 plane of bottom base, and bottom base 8 opens up a lower diffusing reflection optical fiber mounting hole 29, this is lower unrestrained anti-
Optical fiber mounting hole 29 is penetrated with light bulb 5 on an axis, 8 side of bottom base opens up the 5th threaded hole 28, the 5th screw thread
Hole 28 is intersected with lower 29 axis of diffusing reflection mounting hole, and the screw of the 5th threaded hole 28 installation is used for fixed lower diffusing reflection optical fiber, under
Pedestal 8 has opened up an inclined bottom base slideway 31, and 31 one end of bottom base slideway and lower diffusing reflection mounting hole 29 are concentric, should
Bottom base slideway 31 skids off the outlet of the present apparatus as cereal, in addition, 8 two sides of bottom base open up two the 6th threaded holes 32,
6th threaded hole 32 passes through a kind of fixed near infrared light source apparatus for the detection of simple grain grain quality of screw installation.
Wherein, upper and lower diffusing reflection optical fiber can directly use the one-to-two type of Ocean Optics unrestrained anti-as acquisition optical fiber
Penetrate optical fiber, long 1m.In view of the demand of cereal little particle detection, optical fiber core diameter uses relatively thick 400 μm, to obtain higher
Coupling efficiency and relatively uniform output facula.
V, conductive board member：With reference to shown in figure 20, conductive plate 6 is annulus shape, adopts and is made from an insulative material, conductive plate 6
16 the second through-holes 33 are offered on annulus, be used for across and fix conduction copper column 3, and the inner ring and outer ring of conductive plate 6 is welded respectively
There are inner ring scolding tin 34 and outer ring scolding tin 35, inner ring scolding tin 34 and outer ring scolding tin 35 to be connected to form respectively with the second through-hole 33 interval
The anode and cathode of the miniature lamp beads of LED 4, the adjacent conductive copper post 3 being installed on the second through-hole 33 also corresponding anode and negative of becoming
Two pins of pole, the miniature lamp beads of LED 4 are connected on respectively on the conduction copper column 3 that this two groups respectively represent anode and cathode, conductive plate
6 can be two or one, be sleeved on the stack shell 10 of light bulb 5, when for two, be close to a support 12 and cylinder across insulation board 7
Lid 2 is close to a support 12 or cover 2 when for one across insulation board 7.
VI, insulation board component：With reference to shown in figure 21, insulation board 7 is also annulus shape, adopts and is made from an insulative material, insulation
Plate 7 is corresponding to the quantity of conductive plate 6 and position, is mounted between cylinder support 12 and conductive plate 6 and/or cover 2 and conductive plate 6, rises
To the effect that conduction copper column 3 and light bulb 5 are isolated in end conduction, if there are two insulation board 7 in 2 one end of cover, opens thereon
Third through-hole 36 is used for across conduction copper column 3,.
VII, conduction copper column component：Refering to what is shown in Fig. 1, conduction copper column 3 shares 16, it surround and is distributed in outside stack shell 10, with
Stack shell length direction is consistent, is installed on the second through-hole 33 of conductive plate 6, positive and negative two pins difference of the miniature lamp beads of LED 4
It is welded on two adjacent conduction copper columns 3, wherein two reach 2 outside of cover, passes through the portion of conductive plate 6 and cover 2
Divide and be wrapped in one piece of ambroin set, two conduction copper columns 3 being pierced by are separately connected the anode and cathode of external power supply, give LED
Miniature lamp bead 4 is powered.
VIII, the miniature lamp bead components of LED：Refering to what is shown in Fig. 1, the miniature lamp beads of LED 4 share 48, with cylindrical light bulb 5
Two bottom surfaces be parallel surface, using 5 axle center of light bulb as symmetry axis, be installed in the hole 11 of 6 rows 8 row, formed and centripetal surrounded entirely
Physical arrangement, lamp bead line space are 8mm, and positive and negative two pins are respectively welded on two adjacent conduction copper columns 3, and parallel connection is even
It connects, U.S. International Light Technologies company 1150-4 models NIR can be selected in the miniature lamp beads of LED 4
The miniature lamp beads of LED, operating voltage 5V, electric current 0.116A, when electrified light emitting, can send out near infrared light.
Above-mentioned transparent glass pipeline internal diameter is equal with top base slideway 24,31 internal diameter of bottom base slideway, and it is practical straight
Diameter size can be made according to different demands.Transparent glass pipeline and upper diffusing reflection optical fiber mounting hole 27 and lower diffusing reflection optical fiber
Mounting hole 29 is located on same axis, and the optical fiber of diffusing reflection up and down of installation is made to be formed to penetrating.
When carrying out the acquisition of cereal near infrared spectrum data using the present apparatus, first the present apparatus is tilted by the 6th threaded hole 32
Ground installation is fixed, and for top base 1 upper, bottom base 8 allows top base slideway 24 and bottom base slideway 31 to have certain height under
Difference, it is to ensure that cereal can slide in top base slideway 24 and transparent glass pipeline and bottom base slideway 31, a pair is unrestrained anti-
It penetrates optical fiber and is respectively arranged in diffusing reflection optical fiber mounting hole 27 and lower diffusing reflection optical fiber mounting hole 29, formed to penetrating, diffused
Fibre is connected to spectrometer, while photoelectric detection probe is installed on photoelectric detection probe mounting hole 25, in addition, need to ensure the present apparatus
It connects after cooling water and is powered again to the miniature lamp beads 4 of LED, superheating phenomenon occurs for anti-locking apparatus.
In the present invention, when seed falls glass slideway via artificial placement, intensity, is obtained inside light supply apparatus
Even property and the full encirclement illumination of good 360 ° of consistency.When the photosignal passed through to seed to penetrating collecting fiber, upper layer is called
Program triggers spectrometer collection seed diffusing in light bulb, is transmitted to spectrometer by acquisition optical fiber and is parsed.
While ensureing that seed can smoothly enter into glass slideway, to make diffusing reflection optical fiber up and down and 5 axle center of light bulb keep same
Axis, and then ensure that cereal kernel any position optical fiber in light bulb 5 can acquire its surface and diffuse, it can make to pass in and out up and down
Expect that channel axle center and light bulb axle center are in 15 °, avoids the mutual interference of optical fiber and input and output material channel.
Present apparatus workflow is：Cereal enters along 24 arrival end of top base slideway, is moved along top base slideway 24, when
When cereal moves to top base slideway 24 with photoelectric detection probe 25 intersection location of mounting hole, photoelectric detection probe is triggered, together
When trigger signal be sent to spectrometer, spectrometer carries out the acquisition of cereal near infrared spectrum data by diffusing reflection to penetrating optical fiber
And the near infrared spectrum data of acquisition is uploaded to the ends PC, then cereal enters from 24 outlet end of top base slideway in light bulb 5
Transparent glass pipeline, then the present apparatus is skidded off along bottom base slideway 31, so far complete the testing process of a cereal.
In the present invention, the near infrared spectrometer FLAME-NIR of Ocean Optics of U.S. volume minimum can be selected in spectrometer,
Its wavelength band is 900~1700nm.FLAME-NIR combines 128 and carries novel non-cooled InGaAs detectors, power consumption
Demand is low, and interchangeable slit, while having 40 needle Micro USB multipurposes to extend mouth, is very suitable for being integrated into hand held system
And portable system.It is 50 μm that the present invention, which selects slit sizes, and to obtain the light-inletting quantity of bigger, external expansion interface is examined with photoelectricity
Probing head, which is connected, obtains triggering information, and triggering pattern selects external rising edge triggering, to realize effective spectra collection and avoiding light
Illumination is saturated, and the time of integration is set as 400ms, and spectrometer carries out both-way communication by USB and computer.
Cereal simple grain quality parameter detection device software is based on 2010 platform developments of Visual Studio, using C++ languages
Speech programming realizes the function setting of spectrometer software based on the embedded OmniDriver software development kits that JAVA language is write
And scheduling.Software main functional modules are as shown in figure 22, and when external hardware edging trigger, software delays 200ms starts spectrum
Instrument is acquired in real time, after intensity signal is converted into absorbance and is pre-processed, is updated to the prediction model being previously implanted
In, the quality parameters such as the internal protein of simple grain cereal are predicted in real time, while the curve of spectrum of sample and prediction are tied
Fruit real-time display.
The present invention selects the protein component of einkorn for research object, verifies the cereal list of the full ambient light source structure
The performance of grain quality parameter detection device selectes 6 kinds, each to obtain the better protein content dispersion of distribution for sample
Kind 50, totally 300.
The detection experiment of 1 wheat simple grain protein content
1.1 near infrared spectra collections and pretreatment
In order to reduce influence of the ambient temperature and humidity to spectra collection, it is 20~25 that experimentation, which keeps room temperature,.DEG C start light
Behind source and spectrometer, preheating half an hour to stabilization starts to acquire spectrum.Optimized acquisition parameter, spectral resolution are set as
5nm, number of scan points 128, scanning times 2.It should be noted that present apparatus half-light spectrum is acquired by standard white plate,
But when light source is closed, the spectrum under collecting fiber to natural light, reference spectra is stabilization light when opening light source no sample
Spectrum.Its absorbance conversion formula is as follows：
A is seed absorbance in formula, and R is emissivity, XrawThe reflected light intensity values for being seed in light source, XrefFor light source work
Reflected light intensity values when making, XdarkFor the reflected light intensity values under natural light.
Since cereal kernel is small, shape differs, surface imperfection, the factors such as inner material is non-homogeneous, near infrared light
The noise informations such as a large amount of baseline drifts, high-frequency noise, light scattering can be added in spectrum gatherer process, directly affect the robustness of model,
Standard normal variable transformation (standard normal variate, SNV) is primarily used to eliminate solid particle size, surface
The influence of scattering and change in optical path length to NIR diffusing reflection spectrums, thus the present invention carries out SNV pretreatments to every curve of spectrum.
1.2 prediction models are established and evaluation
For the feasibility that verification device detects einkorn protein content, the present invention is based on the samples of joint X-Y distances
This division (Sample set partitioning based on joint X-Y distance, SPXY) method, will be for sample
This presses 2：1 ratio cut partition is that calibration set and verification collect, and successive projection algorithm is then utilized in Matalab softwares
(Successive projections algorithm, SPA) has carried out dimensionality reduction to spectroscopic data, finds and believes containing minimum redundancy
The set of variables of breath.Utilize coefficient of determination R2, establish the Multiple Linear Regression Forecasting Models of Chinese of feature based wavelength, calibration set standard scores
Analyse error (Standard error of calibration, SEC) and verification collection standard analysis error (Standard of
Prediction, SEP) evaluation analysis is carried out to prediction model.
1.3 einkorn protein content determinations
Einkorn is light-weight, and corn protein is not achieved and measures the minimum sample size requirement of common Kjeldahl's method, this
Invention carries out einkorn nitrogen using the elemental analyser ECS 4024 of Costech companies of Italy based on Dumas combustion
The detection of constituent content, referring next to national standard GB2905-82 be multiplied by wheat, beans protein adjustment factor 5.7, be converted
At protein content.
2 results and discussion
The foundation of 2.1 einkorn protein content prediction models
As shown in figure 23, it is 961nm, 1189nm, 1194nm respectively by 9 characteristic wavelengths selected by SPA algorithms,
1200nm, 1223nm, 1338nm, 1400nm, 1435nm, 1632nm, selected characteristic wavelength are predominantly located in two frequency multiplication of c h bond
1120~1260nm of absorption band and c h bond, O-H keys, N-H keys a 1350~1480nm of frequency multiplication composite absorption bands of a spectrum near,
As it can be seen that remaining the feature spectral coverage of protein after SPA feature extractions, thus the protein based on selected characteristic wavelength may be implemented
Content prediction.
Based on the characteristic wavelength extracted, establishing multiple linear regression equations is：
Y=12.71-561.91x1+5500.74x2+2533.42x3-4248.54x4
-5659.53x5+185.89x6+15.84x7-1207.89x8+180.46x9
In formula, y is protein prediction value, xi(i=1,2 ... 9) it is respectively absorbance value 9 characteristic wavelength under.
The linear model embedded system software is fitted measured value after carrying out protein prediction for examination wheat to 300
It is as shown in figure 24 with predicted value, calibration set R2For 0.8446, SEC 1.0426, verification collection R2It is for 0.8190, SEP
1.0374.Illustrate that the protein content that einkorn can be carried out with the device that the present invention is developed is predicted, the model established
With good predictability.
In order to verify the full technical indicator for surrounding structure light source designed by the present invention, from wavelength repeatability, absorbance weight
Three aspects such as renaturation and prediction repeatability are tested and have been analyzed.
(1) wavelength repeatability
When light stability works, sample is not placed, a current reference spectrum was acquired every one minute or so, adopts every time
It is current integration time 400ms to collect duration, and the error rod figure of each wavelength is as shown in figure 25, and the error line of as a result visible each wave number is very
It is small, it can reach the requirement of general sweep type near infrared spectroscopy instrument.
(2) absorbance repeatability
The present invention is to same wheat stochastical sampling 30 times, the absorbance standard deviation on entire spectrum range and error
Line is as shown in figure 26, substantially meets the requirement of general absorbance repeatability.
(3) prediction repeatability
5 samples are randomly selected, under the same conditions, to 5 absorbance spectrums of each sample collection, using prediction model
Formula carries out protein content prediction, and the results are shown in Table 1, it is seen then that prediction result reproducibility is good, illustrates to surround light using complete
The near infrared light spectra system of source structure can eliminate the influence of cereal-granules shape and random dress sample to quality prediction.
Table 1 predicts repetitive test result
| Predicted value (%) | Sample 1 | Sample 2 | Sample 3 | Sample 4 | Sample 5 |
| For the first time | 14.30 | 9.77 | 13.00 | 13.95 | 16.38 |
| Second | 14.67 | 9.63 | 12.79 | 13.44 | 16.39 |
| For the third time | 14.71 | 9.43 | 12.64 | 13.65 | 16.59 |
| 4th time | 13.98 | 9.62 | 12.72 | 13.73 | 16.75 |
| 5th time | 14.65 | 9.71 | 12.79 | 13.42 | 16.59 |
| Standard deviation | 0.28 | 0.11 | 0.12 | 0.16 | 0.14 |
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of near infrared light source apparatus for the detection of simple grain grain quality, which is characterized in that including light bulb (5), light bulb (5)
Inside is provided as the transparent glass pipeline of cereal motion path, and the stack shell (10) of light bulb (5) is provided with the miniature lamp bead peaces of several LED
It fills hole (11), a miniature lamp bead of LED (4), one end of the light bulb (5) is installed in each miniature lamp bead mounting holes (11) of LED
Top base (1) is set, and bottom base (8) is arranged in the other end, and the top base (1) offers inclined top base slideway (24), institute
It states bottom base (8) and offers inclined bottom base slideway (31), cereal enters along top base slideway (24) arrival end, from outlet end
Transparent glass pipeline into light bulb (5), then skidded off along bottom base slideway (31), wherein it is provided with and is used in top base (1)
Installation acts on the upper diffusing reflection optical fiber mounting hole (27) of the upper diffusing reflection optical fiber of top base slideway (24) and is acted on for installation
It is provided with and is used in the photoelectric detection probe mounting hole (25) of the photoelectric detection probe of top base slideway (24), bottom base (8)
Installation acts on the lower diffusing reflection optical fiber mounting hole (29) of the lower diffusing reflection optical fiber of bottom base slideway (31).
2. being used for the near infrared light source apparatus of simple grain grain quality detection according to claim 1, which is characterized in that the cylinder
Body (10) is provided with m rows n and arranges the evenly arranged miniature lamp bead mounting holes (11) of LED, is provided in the light bulb (5) for logical cooling
The cooling duct (15) of water, cooling duct (15) is serpentine-like to be distributed between every two row miniature lamp beads of LED (4), the cooling duct (15)
Cooling duct water inlet (13) and cooling duct water outlet (14) be designed as threaded hole.
3. being used for the near infrared light source apparatus of simple grain grain quality detection according to claim 1, which is characterized in that the lamp
One end of cylinder (5) is provided with the cover (2) of centre bore, and cover (2) connects top base (1), centre bore and top base slideway
(24) outlet end connection.
4. being used for the near infrared light source apparatus of simple grain grain quality detection according to claim 3, which is characterized in that the lamp
The stack shell (10) of cylinder (5) surround several conduction copper columns consistent with stack shell length direction (3), the miniature lamp beads of LED (4) is distributed with outside
Anode be connected on the conduction copper column (3) of positive pole, cathode is connected on the conduction copper column (3) of power cathode, is formed logical
Road.
5. being used for the near infrared light source apparatus of simple grain grain quality detection according to claim 4, which is characterized in that the lamp
The other end of cylinder (5) is provided with cylinder support (12), and the conduction copper column (3) is mounted on the conductive plate (6) of annular, conductive plate (6)
It is sleeved on stack shell (10), including is welded with the inner ring and outer ring of inner ring scolding tin (34) and outer ring scolding tin (35) respectively, the interior lap welding
Tin (34) and outer ring scolding tin (35) are connected with one end interval of conduction copper column (3) respectively so that adjacent conduction copper column (3) is respectively
Connect the positive and negative anodes of power supply.
6. being used for the near infrared light source apparatus of simple grain grain quality detection according to claim 4, which is characterized in that described to lead
Battery plate (6) has two pieces or one piece, when for two pieces, when for two pieces, the both ends of light bulb (5) is separately positioned on, across insulation
Plate (7) is close to cylinder support (12) and cover (2), and the outer rings of two pieces of conductive plates (6) connects positive pole or cathode, two pieces interior
Circle connects the cathode or anode of power supply, and the both ends of the same root conduction copper column (3) of two pieces of conductive plates (6) are connected to two pieces
On the inner ring scolding tin (34) of conductive plate (6) or the outer ring scolding tin (35) of two pieces of conductive plates (6)；When for one piece, it is arranged in light bulb
(5) one end or the other end are close to cylinder support (12) or cover (2) across insulation board (7), and outer ring connects positive pole or negative
Pole, inner ring connect the cathode or anode of power supply.
7. being used for the near infrared light source apparatus of simple grain grain quality detection according to claim 6, which is characterized in that described exhausted
Listrium (7) is annulus shape, adopts and is made from an insulative material, consistent with the quantity of conductive plate (6), play conduction copper column (3) and
The effect that light bulb (5) is isolated in light bulb (5) both ends conduction, wherein if insulation board (7) is in cover (2) one end, insulation board (7)
For the through-hole (36) across conduction copper column (3) there are two opening, wherein be separately connected the miniature lamp beads of LED (4) anode and cathode
Two conduction copper columns (3) reach cover (2) outside, and for being directly connected to positive pole and cathode, and conduction copper column (3) is passed through and led
The portion envelops of battery plate (6) and cover (2) one piece of ambroin set.
8. according to claim 4 or 7 near infrared light source apparatus for the detection of simple grain grain quality, which is characterized in that institute
It states top base (1) and is additionally provided with the 4th threaded hole (26), the upper diffusing reflection optical fiber mounting hole (27) is with cover (2) in an axis
On line, and concentric with the arrival end of top base slideway (24), wherein install diffusing reflection optical fiber, the 4th threaded hole (26) with it is upper
Diffusing reflection mounting hole (27) axis intersects, and the screw of the 4th threaded hole (26) installation is for fixed upper diffusing reflection optical fiber, the light
Electro-detection probe mounting holes (25) intersect with upper diffusing reflection optical fiber mounting hole (27), wherein installing photoelectric detection probe；Under described
Pedestal (8) is additionally provided with the 5th threaded hole (28), and lower diffusing reflection optical fiber mounting hole (29) and bottom base slideway (31) outlet end are same
Axle center, and with light bulb (5) on an axis, for installing lower diffusing reflection optical fiber, the 5th threaded hole (28) is overflow instead with lower
The intersection of optical fiber mounting hole (29) axis is penetrated, the screw of the 5th threaded hole (28) installation is for fixed lower diffusing reflection optical fiber；The cylinder
It is used for the cover mounting hole (19) in light bulb (5) there are two being opened up on lid (2), two are offered on the top base (1)
A top base mounting hole (23) for being mounted on cover (2), opens up that there are two for being mounted on lamp on the bottom base (8)
Installation screw head is hidden under plane by the bottom base mounting hole (30) on cylinder (5).
9. being used for the near infrared light source apparatus of simple grain grain quality detection according to claim 8, which is characterized in that described
Bright glass pipe internal diameter is equal with top base slideway (24), bottom base slideway (31) internal diameter, and the transparent glass pipeline is overflow with upper
Mirror based fiber optica mounting hole (27) and lower diffusing reflection optical fiber mounting hole (29) are located on same axis, and the upper and lower of installation is made to diffuse
Fibre is formed to penetrating.
10. based on the detecting system for the near infrared light source apparatus for being used for the detection of simple grain grain quality described in claim 1, feature
It is, including：
Upper diffusing reflection optical fiber is set to the upper diffusing reflection optical fiber mounting hole (27)；
Lower diffusing reflection optical fiber is set to the lower diffusing reflection optical fiber mounting hole (29), and acquisition optical fiber is formed with upper diffusing reflection optical fiber；
Spectrometer connects the upper diffusing reflection optical fiber and lower diffusing reflection optical fiber, receives the simple grain cereal kernel of its acquisition in light bulb (5)
Interior diffuses；
The intensity signal of spectrometer collection to diffuse is converted into absorbance and pre-processed by processing unit, based on pre-
It surveys model to predict the quality parameter of simple grain cereal in real time, while the curve of spectrum to sample and prediction result are shown in real time
Show.
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