CN106769993A - Sample compressing tablet bogey, terahertz light spectral measurement system and measuring method - Google Patents
Sample compressing tablet bogey, terahertz light spectral measurement system and measuring method Download PDFInfo
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 238000001228 spectrum Methods 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 20
- 230000033001 locomotion Effects 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 4
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 16
- 238000002474 experimental method Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 9
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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
- G01N21/3581—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
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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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
- G01N21/3581—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]
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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Abstract
The present invention relates to tera-hertz spectra technical field of measuring equipment, more particularly to a kind of sample compressing tablet bogey, terahertz light spectral measurement system and measuring method.The sample compressing tablet bogey includes compressing tablet fixation kit, drive component and control assembly, compressing tablet fixation kit is used for fixed multiple sample compressing tablet simultaneously, control assembly is connected by drive component with compressing tablet fixation kit, the amount of moving horizontally of compressing tablet fixation kit is driven with by controlling the rotational displacement of drive component, so as to effectively improve continuous measurement and the accuracy of auto-focusing of sample compressing tablet, improve the accuracy of experiment effect, the present apparatus is applied to varying strength, the compressing tablet of thin and thick, sample compressing tablet is continuously measured in groups, conventional efficient can be effectively improved, when carrying out Terahertz experiment using system by tera-hertz spectra measuring method, nitrogen consumption can be substantially reduced, it is cost-effective；Remote control can also be realized using control assembly, it is to avoid the harmful sample of experimenter's directly contact and do harm to huamn body.
Description
Technical field
The present invention relates to tera-hertz spectra technical field of measuring equipment, more particularly to a kind of sample compressing tablet bogey, too
Hertz spectral measurement system and measuring method.
Background technology
Terahertz emission is between 0.1THz~10THz (1THz=1012Hz the electromagnetic radiation of frequency between), its is corresponding
Wave-length coverage is 30nm~3mm, belongs to far infrared band, and it is just at electronics and the transitional region of photonic propulsion.This is frequently
The electromagnetic wave of section is referred to as millimeter wave or submillimeter wave in electronics, and is then referred to as far infrared in spectroscopy.
At present, the purposes of tera-hertz spectra is increasingly extensive, and people go to carry out such as agricultural, day using terahertz light spectral technology
The work such as text, Chromaticity metering, environment measuring, semi-conductor industry, composition detection.The popularization of tera-hertz spectra application be unable to do without early stage
Probing into for spectrum experiment, studies and finds：THz wave has the characteristic of very strong absorption to moisture, very sensitive, is being tested
Shi Tongchang needs to be excluded using nitrogen, to avoid the waste of nitrogen, thus unsuitable excessive, the structure in Terahertz test specimen clamp area
It is relatively easy；Take out sample box be put into sample be difficult it is frequent.
Additionally, Terahertz can by some high-risk material absorbings, so also be used for do some related experiments, if experimenter
Contact for a long time, can influence healthy unavoidably, thus for such case, it would be desirable to which sample bearing device can be realized
Remote control, and in current tera-hertz spectra laboratory apparatus sample compressing tablet carry be still present on clamping device it is certain not
Foot is, it is necessary to be improved.
Typically, carrying out when tera-hertz spectra is tested using more as single clip holds scalable style product compressing tablet carrying dress
Put, although the apparatus structure is simple, and price is relatively low, but has the following disadvantages：
(1) clamping effect is not satisfactory, and clamping is difficult especially for relatively thin sample compressing tablet, in use, when going out
When now sample strength of pressed pieces is relatively low, it is easy to so that compressing tablet is broken, influence measurement；
(2) device cannot be measured continuously to Multi-example compressing tablet, and efficiency is more low；
(3) focus process is substantially to realize that precision is low using human eye observation；
(4) cannot realize automatically controlling, it is necessary to experimenter's long-time and drug contact.
The content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention there is provided a kind of sample compressing tablet bogey, terahertz light spectral measurement system
And measuring method, it is adaptable to the sample compressing tablet of varying strength, continuous measurement and auto-focusing can be realized.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of sample compressing tablet bogey, including compressing tablet fixation group
Part, drive component and control assembly, the compressing tablet fixation kit are used for fixed multiple sample compressing tablet simultaneously, and the control assembly is led to
Component of overdriving is connected with compressing tablet fixation kit, and compressing tablet fixation kit is driven with by controlling the rotational displacement of drive component
The amount of moving horizontally.
Further, the drive component includes stepper motor and leading screw, and the control assembly passes through stepper motor and silk
Thick stick is connected, to drive the leading screw to rotate；The compressing tablet fixation kit is sheathed on outside the leading screw, in the rotational band of the leading screw
Moved horizontally along leading screw under dynamic, the angular displacement that the leading screw is rotated and the compressing tablet fixation kit along leading screw the amount of moving horizontally
Between have preset ratio.
Further, the stepper motor is connected with least two leading screws be arrangeding in parallel, silk described in each bar simultaneously
Thick stick is in same level, and the compressing tablet fixation kit is sheathed on outside leading screw described in each bar simultaneously, by silk described in each bar
Thick stick is rotated and drives being moved horizontally along leading screw described in each bar for compressing tablet fixation kit synchronization simultaneously.
Further, the compressing tablet fixation kit includes movable block and fixed mount, and the fixed mount is fixed on movable block,
The movable block is sheathed on outside drive component, and the drive component drives movable block to move horizontally by rotating；The fixed mount
It is provided with multiple fixed grooves for fixing sample compressing tablet.
Further, the fixed mount includes base plate and fixed plate, and the base plate is fixed on the upper surface of movable block, institute
State that fixed plate is vertical to be fixed on the upper surface of base plate, be provided with multiple fixed grooves, and side in the fixed plate vertically
Face insertion is provided with multiple measurement mouths, and each described measurement mouth is correspondingly arranged with each fixed groove respectively, the base plate and solid
The pad for adjusting the sample compressing tablet height is provided between fixed board.
Further, also including laser positioning component, the laser positioning component is fixedly installed on the compressing tablet fixation group
Beyond part, and it is connected with the control assembly, the compressing tablet fixation kit is moved relative to laser positioning component level, by institute
State laser positioning component and move horizontally positioning for compressing tablet fixation kit.
Further, the laser positioning component includes Laser emission end and laser pick-off end, laser pick-off end and control
Component is connected；What the Laser emission end and laser pick-off end were respectively symmetrically is fixedly installed on the two of the compressing tablet fixation kit
Side, to form laser beam between the Laser emission end and laser pick-off end, the compressing tablet fixation kit is when moving horizontally
Cut the laser beam；The loophole for passing through the laser beam is provided with the compressing tablet fixation kit.
Further, the control assembly includes microcomputer control end, is loaded with the microcomputer control end for controlling to drive
The virtual instrument graphic user interface that dynamic component is rotated.
Present invention also offers a kind of terahertz light spectral measurement system, it is characterised in that including sample pressure as described above
Piece bogey.
Present invention also offers a kind of tera-hertz spectra measuring method, comprise the following steps：
S1, determine that each described testing sample compressing tablet for one group, is separately fixed at compressing tablet and fixed by A testing sample compressing tablet
In each fixed groove of component；
S2, the focusing of at least two steps is carried out to a-th testing sample in A testing sample compressing tablets；
S3, measure a-th testing sample by Terahertz measuring apparatus；
S4, return to step S2, and make a=a+1, until during a=A, measurement terminates.
(3) beneficial effect
Above-mentioned technical proposal of the invention has the advantages that：Sample compressing tablet bogey of the invention includes compressing tablet
Fixation kit, drive component and control assembly, compressing tablet fixation kit are used for fixed multiple sample compressing tablet simultaneously, and control assembly passes through
Drive component is connected with compressing tablet fixation kit, and the water of compressing tablet fixation kit is driven with by controlling the rotational displacement of drive component
Translation momentum, so as to effectively improve continuous measurement and the accuracy of auto-focusing of sample compressing tablet, distinguishes without experimenter's observation
Know adjustment focusing, it is to avoid the influence that human factor is caused, improve the accuracy of experiment effect, meanwhile, the present apparatus is applied to difference
Intensity, the compressing tablet of thin and thick, sample compressing tablet are continuously measured in groups, can effectively improve conventional efficient, by terahertz light spectrometry
When method carries out Terahertz experiment using system, nitrogen consumption can be substantially reduced, it is cost-effective；Additionally, using control assembly also
Remote control can be realized, it is to avoid the harmful sample of experimenter's directly contact and do harm to huamn body.
Brief description of the drawings
Fig. 1 is the structural representation of the sample compressing tablet bogey of the embodiment of the present invention；
Fig. 2 is the top view of the sample compressing tablet bogey (being free of control assembly) of the embodiment of the present invention；
Fig. 3 is the front view of the fixed mount of the embodiment of the present invention；
Fig. 4 be Fig. 3 in A-A to sectional view；
Fig. 5 for the device of the embodiment of the present invention slightly focused using laser positioning component when, control assembly receives
Signal graph；
Fig. 6 for the device of the embodiment of the present invention carry out micro- focusing using laser positioning component when, control assembly receives
Signal graph.
Wherein, 1, bearing；2nd, draw runner；3rd, leading screw；4th, movable block；5th, pad；6th, stepper motor；7th, microcomputer control end；8、
Fixed mount；9th, mounting hole；10th, fixed groove；11st, mouth is measured；12nd, base plate；13rd, fixed plate；14th, laser pick-off end；15th, laser
Transmitting terminal；16th, laser fixed mount；17th, loophole.
Specific embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following examples are used for
The present invention is illustrated, but can not be used for limiting the scope of the present invention.
In the description of the invention, unless otherwise indicated, " multiple " is meant that two or more.Term " on ",
The orientation or position relationship of the instruction such as D score, "left", "right", " interior ", " outward ", " front end ", " rear end ", " head ", " afterbody " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of and describes the present invention and simplify to describe, rather than instruction or dark
Showing the device or element of meaning must have specific orientation, with specific azimuth configuration and operation therefore it is not intended that right
Limitation of the invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary.For this
For the those of ordinary skill in field, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.
As shown in figure 1, the sample compressing tablet bogey that the present embodiment is provided includes compressing tablet fixation kit, drive component and control
Component processed, wherein, compressing tablet fixation kit is used for fixed multiple sample compressing tablet simultaneously, using the self gravitation and compressing tablet of sample compressing tablet
The anti-bearing pressure of fixation kit fixes whole group sample compressing tablet, so as to realize the multiple sample compressing tablets of continuous measurement；Control assembly passes through
Drive component is connected with compressing tablet fixation kit, and the water of compressing tablet fixation kit is driven with by controlling the rotational displacement of drive component
Translation momentum, so as to effectively improve continuous measurement and the accuracy of auto-focusing of sample compressing tablet, distinguishes without experimenter's observation
Know adjustment focusing, it is to avoid the influence that human factor is caused, improve the accuracy of experiment effect, meanwhile, the present apparatus is applied to difference
Intensity, the compressing tablet of thin and thick, sample compressing tablet are continuously measured in groups, can effectively improve conventional efficient, are particularly tested in Terahertz
In, nitrogen consumption can be substantially reduced, it is cost-effective；Additionally, remote control can also be realized using control assembly, it is to avoid experimenter
The harmful sample of directly contact and do harm to huamn body.
As shown in Fig. 2 the drive component of the present embodiment preferably includes stepper motor 6 and leading screw 3, control assembly passes through stepping
Motor 6 is connected with leading screw 3, and to drive leading screw 3 to rotate, compressing tablet fixation kit is sheathed on outside leading screw 3, is driven in the rotation of leading screw 3
It is lower to be moved horizontally along leading screw 3, electric pulse is converted into angular displacement by stepper motor 6 using control assembly, drive 3 turns of leading screw
It is dynamic, so as to rotate the amount of moving horizontally that adjutant's amount of spin is converted into compressing tablet fixation kit in proportion, Jin Ershi using ball-screw 3
Between existing accurate auto-focusing, and the amount of moving horizontally of the angular displacement and compressing tablet fixation kit rotated due to leading screw 3 along leading screw 3
With preset ratio, the accuracy of auto-focusing can be effectively improved, further the accuracy of lifting experimental data, improve experiment effect
Really.
For the stability being further ensured that when compressing tablet fixation kit is translated, preferably stepper motor 6 is connected with least simultaneously
Two leading screws 3 be arrangeding in parallel, each bar leading screw 3 is in same level, and compressing tablet fixation kit is sheathed on each bar silk simultaneously
Outside thick stick 3, rotated simultaneously by each bar leading screw 3 and drive being moved horizontally along each bar leading screw 3 for compressing tablet fixation kit synchronization.
As shown in Figure 3, Figure 4, the compressing tablet fixation kit of the present embodiment includes movable block 4 and fixed mount 8, and fixed mount 8 is fixed
On movable block 4, movable block 4 is sheathed on outside drive component, and drive component drives movable block 4 to move horizontally by rotating；It is fixed
Frame 8 is provided with multiple fixed grooves 10 for fixing sample compressing tablet.
Preferably, fixed mount 8 includes base plate 12 and fixed plate 13, and base plate 12 is fixed on the upper surface of movable block 4, fixed
Plate 13 is vertical to be fixed on the upper surface of base plate 12, is provided with multiple fixed grooves 10 in fixed plate 13 vertically, and each is fixed
Insertion is provided with multiple measurement mouths 11 respectively for the side of groove 10, and fixed groove 10 is corresponding sets with each respectively for each measurement mouth 11
Put, when sample compressing tablet is inserted vertically into fixed groove 10, using the self gravitation and the anti-branch of fixed groove 10 of sample compressing tablet
The collective effect of power, makes sample compressing tablet be fixed on vertically in fixed groove 10, and the sample position with observation can be corresponded to and is located at
In measurement mouth 11, to carry out auto-focusing and measurement to sample, while fixing stability when compressing tablet is measured is improved, so that
The device can be used for carrying varying strength, the compressing tablet of different thin and thicks, without damaging compressing tablet in itself；Further, since fixed plate
Multiple fixed grooves 10 are provided with 13, therefore can once carry multiple sample compressing tablets, using instrument simultaneously to the multiple of the group
Sample compressing tablet is focused and is measured, and to realize continuous measurement, improves conventional efficient, particularly in Terahertz experiment, due to
Need that to the input of sample compressing tablet nitrogen consumption can be greatly reduced before measurement every time, it is cost-effective.
When the sample position in sample compressing tablet can not be correspondingly arranged well with measurement mouth 11, preferably in base plate 12 and admittedly
The pad 5 for adjusting sample compressing tablet height is provided between fixed board 13, for the ease of regulation compressing tablet position, the quantity of pad 5 is
Multiple, and thickness is different, by the sample position in the Height Adjustment sample compressing tablet of pad 5, so that its accurate alignment
In measurement mouth 11；Additionally, in order to ensure being reliably connected between base plate 12 and movable block 4, it is uniform preferably on base plate 12
Multiple mounting holes 9 are provided with, mounting hole 9 is passed through using bolt, the base plate 12 of fixed mount 8 is fixed on the upper surface of movable block 4
On, while the pad 5 of different-thickness is fixed between movable block 4 and fixed mount 8.
The control assembly of the present embodiment includes microcomputer control end 7, preferably PC, be loaded with microcomputer control end 7 for
The virtual instrument graphic user interface (hereinafter referred to as GUI) that control drive component is rotated.In the present embodiment, in microcomputer control end 7
The programming development environment of loading is preferably LabVIEW, and LabVIEW is a kind of programming development environment, by National Instruments
(abbreviation NI companies) develops, and similar to C and BASIC development environments, but LabVIEW is notable with other computer languages
Difference is：Other computer languages are all to produce code using text based language, and LabVIEW uses graphical volume
Collect language G and write program, the program of generation is the form of block diagram；In Labview environment, coordinate the motion control card of NI companies
Using virtual instrument graphic programming GUI, electric pulse is converted to the angular displacement of stepper motor 6 by microcomputer control end 7, so that
The amount of spin of precise control leading screw 3, and then the amount of spin of leading screw 3 is converted into the translational movement of movable block 4 in proportion, so as to realize essence
Trueization auto-focusing；Preferably, when the microcomputer control end 7 of the present embodiment controls stepper motor 6 by GUI, can use wired
Connection, it would however also be possible to employ remote wireless control, by the use of microcomputer control end 7 as host computer, by the use of GUI as operation interface, can
To realize the measurement experiment process of long-range accuracy-control system, so as to avoid harmful sample compressing tablet and direct body contact, and it is right
Human body causes harm.
The device of the present embodiment also includes bearing 1 and slider bar, and drive component and slider bar are separately fixed on bearing 1,
Slider bar is arranged in compressing tablet fixation kit, and is be arranged in parallel with the direction that moves horizontally of compressing tablet fixation kit.
Specifically, parallel between the two ends of bearing 1 of the present embodiment be fixed with two leading screws 3, the axis of two leading screws 3 sets
It is placed in same level, two same one end of leading screw 3 are connected with stepper motor 6 simultaneously, it is same to be driven by stepper motor 6
Step is rotated；The two bottom sides of movable block 4 are set in outside two leading screws 3, and two middle settings of leading screw 3 have draw runner 2, draw runner
2 pass through in the bottom of movable block 4, and to ensure that movable block 4 is more stablized when sliding, the two ends of draw runner 2 are solid respectively at the two ends of bearing 1
It is fixed, when stepper motor 6 is synchronous drives two leading screws 3 to rotate, the stabilization in the case where two synchronous axial systems of leading screw 3 drive of movable block 4
Move horizontally, there is preset ratio between angular displacement that leading screw 3 is rotated and the amount of moving horizontally of movable block 4, it is automatic to ensure
The accuracy of focusing.
The upper surface of movable block 4 is fixed with fixed mount 8 by six bolts, wherein, set respectively on the base plate 12 of fixed mount 8
Six mounting holes 9 are equipped with, fixed plate 13 is vertically arranged with its horizontal axis position, set the both sides of fixed plate 13 are each symmetrical
There are three mounting holes 9, the reliability of base plate 12 is fixed on the upper surface of movable block 4 with using bolt；In base plate 12 and movable block 4
Between be additionally provided with the different pad 5 of multiple thickness；It is vertical in fixed plate 13 to be provided with three fixed grooves 10, at each
Insertion is provided with a circular measurement mouth 11 respectively for the both sides of fixed groove 10, in order to the measurement to press sheet compression；Measurement mouth 11
Can also be square, polygon or other shapes.
It should be noted that the mounting hole 9 of the present embodiment is set to three, it is also possible to multiple is set to, preferably by multiple
Mounting hole 9 is arranged symmetrically on the both sides of fixed plate 13, to ensure the stability of fixed mount 8；The fixed groove 10 of the present embodiment
Quantity be three, it is also possible to be set to two or more than three, size and press sheet compression of the particular number according to movable block 4
Size is set.
Position and the amount of moving horizontally are moved horizontally in order to be more accurately positioned compressing tablet fixation kit, the device also includes swashing
Light-seeking component, laser positioning component is fixedly installed on beyond compressing tablet fixation kit, and is connected with control assembly, compressing tablet fixation group
Part is moved relative to laser positioning component level, and positioning is moved horizontally for compressing tablet fixation kit by laser positioning component.
Specifically, the laser positioning component of the present embodiment includes Laser emission end 15 and laser pick-off end 14, laser pick-off
End 14 is connected with control assembly；What Laser emission end 15 and laser pick-off end 14 were respectively symmetrically is fixedly installed on compressing tablet fixation kit
Both sides, and laser beam is formed between Laser emission end 15 and laser pick-off end 14, compressing tablet fixation kit is when moving horizontally
Cutting laser beam, when laser beam is cut, because laser pick-off end 14 cannot receive laser beam, so as to anti-to control assembly
The position of feed voltage piece fixation kit；The loophole 17 for passing through laser beam is provided with compressing tablet fixation kit, works as compressing tablet
During fixation kit movement cutting laser beam, the position of compressing tablet fixation kit is judged through loophole 17 using laser beam.It is preferred that
Laser emission end 15 and laser pick-off end 14 are fixed on the both sides of bearing 1 by laser fixed mount 16 respectively, additionally, in order to avoid
Laser fixed mount 16 has influence on Terahertz measuring apparatus by measuring mouth 11 accurately measurement press sheet compression, preferably laser fixed mount 16
Height be not higher than measurement mouth 11 minimum point.
It is preferred that several loopholes 17 are provided with the fixed mount 8 of compressing tablet fixation kit, quantity and the survey of loophole 17
The quantity for measuring mouth 11 is correspondingly arranged, and sets the Terahertz measuring apparatus in Terahertz measuring system are corresponding with the position of laser beam
Put so that when any loophole 17 of laser beam transparent, it is ensured that the measurement angle of Terahertz measuring apparatus and measurement mouth position essence
Really focusing.
Specifically, multiple elongated gaps preferably are provided with the lower end of fixed mount 8 in the present embodiment, in this, as multiple loopholes
17, each elongated gap is vertically arranged at the lower section of measurement mouth, and ensures the axis perpendicular with measurement mouth；Using stepper motor
The displacement of 6 pairs of movable blocks 4 is automatically controlled, and is realized under the auxiliary at Laser emission end 15 and laser pick-off end 14 certainly
Dynamic focus function, improves experimental precision；The step angle of the stepper motor 6 of the present embodiment is 1.5 °, and ball-screw 3 is led substantially
Journey is 4mm, and the speed in stepper motor each stage is then determined by the pulse spacing of the reset data part of GUI, it is possible in GUI
On by starting, suspending, move to right, move to left and trim button controls the stroke of movable block 4.
In the control assembly of the present embodiment, GUI is loaded with the PC as microcomputer control end 7, stepping is connected using GUI
Motor 6, with the amount of feeding of remote control stepper motor 6, so as to control the angular displacement that leading screw 3 is rotated, GUI can be surveyed by being input into
Measure the parameters of experiment, so as to extrapolate accurate auto-focusing data, and then by the angular displacement that controls leading screw 3 to rotate come
The amount of moving horizontally of precise control movable block 4, to realize more accurate auto-focusing.
The present embodiment additionally provides a kind of terahertz light spectral measurement system, and the system is held including sample compressing tablet as described above
Carry and put.When the measurement of sample compressing tablet is carried out using the system, three sample compressing tablets of the whole group that will be made first are corresponded to respectively
It is inserted vertically into three fixed grooves 10 of fixed mount 8, sample compressing tablet is fixed, then covers the present embodiment with cloche
Device, to nitrogen is passed through in cloche, to exclude the interference of water vapor in air；Moved horizontally using GUI control movable blocks 4
Into auto-focusing, in focus process, startup GUI control programs are first clicked on, according to current location, selection is moved to left or moves to right completion
Thick focusing, when laser positioning component receives the pulse signal of laser beam formation first, stepper motor 6 stops, and at this moment clicks on
Trim button, under the auxiliary of vernier control program, carries out micro- focusing；The Terahertz measuring apparatus in system are then turned on to sample
Product compressing tablet is measured, and after a sample compressing tablet is measured, can be clicked on gui interface control stepper motor 6 and be moved, and makes movement
Block 4 moves horizontally second sample compressing tablet of drive and is in measurement position and completes auto-focusing, so as to realize continuous measurement；When whole
After group sample compressing tablet successively completes measurement, the sample compressing tablet that taking-up has been surveyed, again to being put into next group of sample in fixed groove 10
Compressing tablet, repeats said process, until completing experiment by sample compressing tablet is all measured.
The present embodiment additionally provides a kind of Terahertz measuring method, and the method is comprised the following steps：
S1, determine that each described testing sample compressing tablet for one group, is separately fixed at compressing tablet and fixed by A testing sample compressing tablet
In each fixed groove of component；
S2, the focusing of at least two steps is carried out to a-th testing sample in A testing sample compressing tablets；
S3, measure a-th testing sample by Terahertz measuring apparatus；
S4, make a=a+1, repeat step S2~S3, until during a=A, measurement terminates.
Wherein, the step S2 is further included：
S201, control stepper motor to start by control assembly, drive the movable block of the compressing tablet fixation kit with second
Speed is moved from one end to the other end；
When S202, the movable block drive a-th sample compressing tablet by control stop position, the control assembly is received
First signal of laser positioning component feedback；
S203, according to first signal, the control assembly control stepper motor stops so that the movable block drives
A-th sample compressing tablet is parked in actual stop position, and now, the control assembly receives the second letter of laser positioning component feedback
Number；
S204, according to the secondary signal, the control assembly control stepper motor starts, and drives the movable block with the
Three speed and moved forward and backward repeatedly by the path increment of Geometric Sequence, when the movable block, to drive a-th sample compressing tablet to be moved to micro-
When regulating and controlling stop position processed, the control assembly receives the 3rd signal of laser positioning component feedback；
S205, according to the 3rd signal, the control assembly control stepper motor stops, so that the movable block is most
Final position is put and is substantially equal to target location.
Specifically, by taking A=3 as an example, i.e., 3 testing sample compressing tablets are one group, first carry out at least two to the 1st testing sample
Step focusing, then measures the 1st testing sample by Terahertz measuring apparatus, and then the 2nd, the 3rd order are focused
And measurement, until during a=A=3, i.e., after 3 testing sample compressing tablets are all measured, measurement terminates, so as to realize that system connects
The effect of continuous measurement.
In step s 2, when compressing tablet fixation kit does not move to measurement position, due to blocking for fixed mount 8, laser connects
Receiving end 15 is received without signal, that is, it is 0 to receive signal；Whenever the loophole 17 of fixed mount 8 moves to Laser emission end 14 and swashs
During 15 center of optical receiving end, i.e., when laser beam passes through loophole 17, laser pick-off end 15 receives the pulse that signal is 1, so that
Signal is fed back on the PC of control assembly, and then the current location of compressing tablet fixation kit is judged using signal, and according to it
Position is controlled to stepper motor, to realize that system completes the work of accurate auto-focusing on the basis of continuous measurement.
Further, the time of auto-focusing is carried out to sample compressing tablet with signal relation figure as shown in Figure 5, Figure 6, in Fig. 5,
The position of the compressing tablet fixation kit at t0 moment is target location, and the position of the compressing tablet fixation kit at t1 moment is coarse adjustment control stopping
Position, the actual stop position of the compressing tablet fixation kit at t2 moment, the position of the compressing tablet fixation kit at t3 moment is vernier control
Stop position.
In above-mentioned steps S201~S205, so that compressing tablet fixation kit is to moving to left as an example, whole auto-focusing process can be excellent
Select to be divided into slightly focus is carried out with two big steps of micro- focusing, specific as follows shown：
The first step, thick focusing：As shown in figure 5, the plug-in of microcomputer control end controls stepper motor 6 first, drive and move
Motion block 4 is moved right rapidly by left end with larger First Speed V1, until laser beam is near the measurement where compressing tablet to be measured
During the loophole 17 of mouth lower end, it is changed to be moved more slowly with second speed V2, wherein V1 ＞ V2；When microcomputer control end 7 is received first
To pulse signal be 1 when, i.e. the first signal, then control stepper motor 6 stop, due in t1 moment microcomputer control ends 7 to stepping
During the input stop signal of motor 6, the rotating speed of stepper motor is larger, i.e. the speed V2 of movable block 4 still has larger speed, easily
Cause movable block 4 because of signal delay or effect of inertia and positional deviation, so that the reality where movable block 4 stops at the t2 moment
Stop position, now laser beam cannot pass through loophole 17, and it is again 0, i.e. secondary signal to cause signal pulse, so as to cause
Deviate larger with target location in the position of movable block 4.
Second step, micro- focusing：Recorded in actual stop position and secondary signal using the plug-in of microcomputer control end 7
Hold, then control stepper motor slowly to rotate according to secondary signal, calculated under control in program, movable block 4 is first with third speed
Then V3 moves to right 2n stroke to n stroke is moved to left, then moves to left 3n stroke, then moves to right 4n stroke, using by etc. compare number
Row are continuously increased the rule of stroke and move left and right, until pulse signal by 0 become 1, i.e. control assembly receive it is fixed from laser
During three signal of hyte part, control stepper motor 6 stops operating, so that the position of movable block 4 is substantially equal to target location；
Wherein, in order to ensure the accuracy of micro- focusing, preferably V3<<V2<V1.
In sum, the sample compressing tablet bogey of the present embodiment includes compressing tablet fixation kit, drive component and control group
Part, compressing tablet fixation kit is used for fixed multiple sample compressing tablet simultaneously, and control assembly is connected by drive component with compressing tablet fixation kit
Connect, the amount of moving horizontally of compressing tablet fixation kit is driven with by controlling the rotational displacement of drive component, so as to effectively improve sample
The continuous measurement of product compressing tablet and the accuracy of auto-focusing, without experimenter's observation identification adjustment focusing, it is to avoid human factor
The influence for causing, improves the accuracy of experiment effect, meanwhile, the present apparatus is applied to varying strength, the compressing tablet of thin and thick, sample compressing tablet
Continuous measurement, can effectively improve conventional efficient in groups, particularly in Terahertz experiment, can substantially reduce nitrogen consumption, section
About cost；Additionally, remote control can also be realized using control assembly, it is to avoid the harmful sample of experimenter's directly contact and to human body
Cause harm.
Embodiments of the invention are given for the sake of example and description, and are not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are for the ordinary skill in the art obvious.Choosing
It is, in order to more preferably illustrate principle of the invention and practical application, and to make one of ordinary skill in the art to select and describe embodiment
It will be appreciated that the present invention is suitable to the various embodiments with various modifications of special-purpose so as to design.
Claims (10)
1. a kind of sample compressing tablet bogey, it is characterised in that including compressing tablet fixation kit, drive component and control assembly, institute
State compressing tablet fixation kit for simultaneously fixed multiple sample compressing tablets, the control assembly is by drive component and compressing tablet fixation kit
Connection, the amount of moving horizontally of compressing tablet fixation kit is driven with by controlling the rotational displacement of drive component.
2. device according to claim 1, it is characterised in that the drive component includes stepper motor and leading screw, described
Control assembly is connected by stepper motor with leading screw, to drive the leading screw to rotate；The compressing tablet fixation kit is sheathed on described
Outside leading screw, moved horizontally along leading screw in the case where the rotation of the leading screw drives, angular displacement and the compressing tablet that the leading screw is rotated
Fixation kit has preset ratio between the amount of moving horizontally of leading screw.
3. device according to claim 2, it is characterised in that the stepper motor is connected with least two and parallel sets simultaneously
The leading screw put, leading screw described in each bar is in same level, and the compressing tablet fixation kit is sheathed on each bar institute simultaneously
State outside leading screw, rotated simultaneously by leading screw described in each bar and drive being moved along leading screw level described in each bar for compressing tablet fixation kit synchronization
It is dynamic.
4. device according to claim 1, it is characterised in that the compressing tablet fixation kit includes movable block and fixed mount,
The fixed mount is fixed on movable block, and the movable block is sheathed on outside drive component, and the drive component is driven by rotating
Movable block is moved horizontally；The fixed mount is provided with multiple fixed grooves for fixing sample compressing tablet.
5. device according to claim 4, it is characterised in that the fixed mount includes base plate and fixed plate, the base plate
It is fixed on the upper surface of movable block, the fixed plate is vertical to be fixed on the upper surface of base plate, in the fixed plate vertically
Multiple fixed grooves are provided with, and side insertion is provided with multiple measurement mouths, each described measurement mouth is fixed with each respectively
Groove is correspondingly arranged；The pad for adjusting the sample compressing tablet height is provided between the base plate and fixed plate.
6. the device according to claim any one of 1-5, it is characterised in that also including laser positioning component, the laser
Positioning component is fixedly installed on beyond the compressing tablet fixation kit, and is connected with the control assembly, the compressing tablet fixation kit
Relative to the movement of laser positioning component level, positioning is moved horizontally for compressing tablet fixation kit by the laser positioning component.
7. device according to claim 6, it is characterised in that the laser positioning component includes Laser emission end and laser
Receiving terminal, the laser pick-off end is connected with control assembly；The fixation that the Laser emission end and laser pick-off end are respectively symmetrically
The both sides of the compressing tablet fixation kit are arranged on, laser beam is formed between the Laser emission end and laser pick-off end, institute
State compressing tablet fixation kit and the laser beam is cut when moving horizontally；It is provided with the compressing tablet fixation kit described sharp for making
The loophole that light beam is passed through.
8. the device according to claim any one of 1-5, it is characterised in that the control assembly includes microcomputer control end,
The virtual instrument graphic user interface for controlling drive component to rotate is loaded with the microcomputer control end.
9. a kind of terahertz light spectral measurement system, it is characterised in that including the sample compressing tablet as described in claim any one of 1-8
Bogey.
10. a kind of tera-hertz spectra measuring method, it is characterised in that comprise the following steps：
S1, determine that each described testing sample compressing tablet for one group, is separately fixed at compressing tablet fixation kit by A testing sample compressing tablet
Each fixed groove in；
S2, the focusing of at least two steps is carried out to a-th testing sample in A testing sample compressing tablets；
S3, measure a-th testing sample by Terahertz measuring apparatus；
S4, return to step S2, and make a=a+1, until during a=A, measurement terminates.
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| CN201611192785.2A CN106769993B (en) | 2016-12-21 | 2016-12-21 | Sample tabletting bearing device, terahertz spectrum measuring system and measuring method |
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