CN207379928U - Utilize the device of tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution - Google Patents
Utilize the device of tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution Download PDFInfo
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- CN207379928U CN207379928U CN201721558881.4U CN201721558881U CN207379928U CN 207379928 U CN207379928 U CN 207379928U CN 201721558881 U CN201721558881 U CN 201721558881U CN 207379928 U CN207379928 U CN 207379928U
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- induced breakdown
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Abstract
Using the device of tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution, ablation breakdown is carried out to the pork sample of dry tabletting using pulse laser beam and generates plasma；Output of laser wavelength is adjusted to the resonant excitation wavelength of Elements Atom to be measured by OPO lasers, adjusting position adjusting mechanism is to control the movement of OPO condenser lens three-dimensional space positions, so that OPO laser beam focus heart position in the plasma, Elements Atom to be measured absorbs energy jump, and then emit fluorescence spectrum, space constraint is carried out by spherical reflector plasma, so that plasma as much as possible is collected after being focused on by plasma acquisition achromatic lens group by fibre-optical probe is transferred to spectrometer, spectrometer is transmitted to processing terminal after the spectral signal received is converted into electric signal, the spectrum of detection is compared by processing terminal, so as to fulfill quick, accurately, green test.
Description
Technical field
The utility model is related to meat quality detection technique field more particularly to a kind of tunable resonance induced with laser of utilization
Breakdown spectral detects the device of pork heavy metal distribution.
Background technology
Main carnivorous source of the pork in the whole world especially China resident for a long time, from 1992 Nian Qi China just
Surmount the U.S. as the world's largest pork country of consumption.The development of pig-breeding industry, but certain have been expedited the emergence of to the great demand of pork
A little raisers are profit-push, add the feed of heavy metal by feeding to promote live pig fast-growth.According to《Ao Teqi in 2015
Survey of Heavy Metals is reported》Data show that the feeds such as 30% complete feed, premix, inorganic mineral and organic mineral substance are former
Contain heavy metal in sample of material, and content is more than the acceptable standard of European Union's feed safety.The feed of feeding heavy metals exceeding standard
Cause pork and swine product there are great potential risk, so as to further bring prestige to the health of ecological environment and the mankind
The side of body.In view of the supply of China live pig is using family's pigsty, self-employed pig raiser and commercial farm as the national conditions of Main Patterns, it is right from source
Feeding live pig and pork process of circulation quality monitoring are there are certain difficulty, and heavy metal pollution belongs to persistently existing risk,
Feasible method is that pork quality is detected safely.
The method of traditional detection pork heavy metal such as atomic absorption spectrography (AAS) AAS, although the method is stablized, high sensitivity,
But sample pre-treatments complex procedures, it is also possible to bring chemical secondary pollution, not meet the demand of green test.
Utility model content
The technical issues of the utility model solves is to provide to be detected using tunable resonance laser induced breakdown spectroscopy
The device of pork heavy metal distribution, to solve the disadvantage that in above-mentioned background technology.
The technical issues of the utility model solves is realized using following technical scheme：
Using the device of tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution, including adjustable three wavelength
Laser, high reflection mirror, sample condenser lens, spherical reflector, Two Dimensional Rotating platform, position adjusting mechanism, plasma are adopted
Collect achromatic lens group, fibre-optical probe, spectrometer, processing terminal, OPO condenser lenses, digital delay generator and OPO laser
Device, the pulse laser beam of the adjustable three-wavelength laser output is in same plane with high reflection mirror, and high reflection mirror is located at
45 ° of the horizontal direction of adjustable three-wavelength laser, sample condenser lens are arranged on immediately below high reflection mirror；The Two Dimensional Rotating is put down
Platform is placed in immediately below sample condenser lens, is placed with to carry out ablation breakdown production by pulse laser beam on Two Dimensional Rotating platform
The pork sample of raw plasma；Two Dimensional Rotating platform oblique upper is equipped with the adjustable plasma acquisition achromatism of acquisition angles
Lens group, spherical reflector are arranged on Two Dimensional Rotating platform rear；It is saturating that the fibre-optical probe is placed in plasma acquisition achromatism
The oblique upper of microscope group, and be connected with spectrometer, spectrometer is connected with processing terminal；The OPO condenser lenses are mounted on position tune
It saves in mechanism, passes through position adjusting mechanism three-dimensional regulation OPO focusing lens positions；The three-wavelength laser, OPO lasers,
Spectrometer is connected respectively with digital delay generator；The plasma is gathered after achromatic lens group focuses on again by plasma
Spectrometer is transferred to by fibre-optical probe collection, the spectral signal of reception is converted to electric signal transmission to processing end by spectrometer
End；OPO lasers and OPO laser beams, the plasma of the generation of OPO condenser lenses are in same plane always simultaneously.
In the utility model, the adjustable three-wavelength laser is the adjustable three-wavelength lasers of Nd-YAG.
In the utility model, the spectrometer is integrated with enhanced CCD (ICCD) detector that pixel is 1024x256,
Spectral resolution higher.
In the utility model, the fibre-optical probe is connected by optical fiber with spectrometer.
In the utility model, the position adjusting mechanism includes guide rail, sliding block and guide post, and OPO condenser lenses are mounted on
On guide post, guide post is mounted on sliding block, and sliding block is placed on guide rail, passes through sliding block and guide post three-dimensional regulation OPO focusing lens positions.
In the utility model, the three-wavelength laser passes through the second control by the first control cable, OPO lasers
Cable, spectrometer are connected by the 3rd control cable with digital delay generator.
In the utility model, the Two Dimensional Rotating platform includes disk and shaft, and shaft is mounted on disk bottom, passes through
Shaft accurately controls angular speed, linear velocity, the acceleration of disc rotary, is uniformly impacted with meeting pulse laser beam in pork sample
The uniformity of defocusing amount is effectively ensured in surface.
In the utility model, the plasma acquisition achromatic lens group includes two panels achromatic lens.
In the utility model, by the pulse laser beam that adjustable three-wavelength laser generates to the pork sample of dry tabletting
Product carry out ablation breakdown and generate plasma, and Output of laser wavelength then is adjusted to Elements Atom to be measured by OPO lasers
So as to which feature enhances Elements Atom the intensity of spectral line to be measured, laser induced breakdown spectroscopy sensitivity is greatly improved in resonant excitation wavelength,
It realizes to object element atom particular excitation；Adjusting position adjusting mechanism is to control OPO condenser lens three-dimensional space positions again
It is mobile, so that heart position, Elements Atom to be measured absorb energy jump, and then transmitting to OPO laser beam focus in the plasma
Fluorescence spectrum；Space constraint is carried out by spherical reflector plasma, so that plasma as much as possible is by plasma
Body acquisition achromatic lens group is collected by fibre-optical probe after focusing on and is transferred to spectrometer, the spectral signal that spectrometer will receive
Processing terminal is transmitted to after being converted into electric signal, meanwhile, digital delay generator accurately controls adjustable three-wavelength laser, OPO
Sequential relationship between laser, spectrometer is finally compared the spectrum of detection by processing terminal, so as to fulfill it is quick,
Accurately, green test.
Advantageous effect：The utility model carries out space constraint by spherical reflector plasma, and using achromatism
Lens group realizes minimum aberration requirement to meet spherical aberration and coma requirement, and by adjusting position adjusting mechanism OPO to be controlled to gather
The movement of focus lens three-dimensional space position so that OPO laser beams impact heart position in the plasma, so as to fulfill OPO laser
Feature excitation is carried out to Elements Atom to be measured, enhances object element the intensity of spectral line, increases substantially detection sensitivity.
Description of the drawings
Fig. 1 is the structure diagram of the preferred embodiment of the utility model.
Specific embodiment
In order to which the technical means, creative features, achievable purpose and effectiveness for realizing the utility model are readily apparent from clearly, under
Face combines and is specifically illustrating, and the utility model is expanded on further.
Referring to Fig. 1 using the device of tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution, including
Nd-YAG is adjustable three-wavelength laser 1, pulse laser beam 2, high reflection mirror 3, sample condenser lens 4, plasma 5, spherical surface are anti-
It penetrates mirror 6, Two Dimensional Rotating platform 7, pork sample 8, guide rail 9, sliding block 10, guide post 11, OPO laser beams 12, plasma and gathers and disappear
Aberration lens group 13, plasma beam 14, fibre-optical probe 15, optical fiber 16, spectrometer 17, computer 18, the 4th control cable 19, the
Three control cables 20, OPO condenser lenses 21, digital delay generator 22, OPO lasers 23, second control cable 24 and first
Control cable 25；The adjustable 1 exportable wavelength of three-wavelength laser of Nd-YAG is that the pulse of 1064nm, 532nm, 355nm swash
Light beam 2；And high reflection mirror 3 is equipped in 45 ° of directions of level of the adjustable three-wavelength lasers 1 of Nd-YAG, it is set immediately below high reflection mirror 3
There is sample condenser lens 4；The Two Dimensional Rotating platform 7 is placed in immediately below sample condenser lens 4, is placed on Two Dimensional Rotating platform 7
It is useful for the pork sample 8 for carrying out ablation breakdown by pulse laser beam 2 and generating plasma 5；7 oblique upper of Two Dimensional Rotating platform
Equipped with the adjustable plasma acquisition achromatic lens group 13 of acquisition angles；It is anti-that 7 rear of Two Dimensional Rotating platform is provided with spherical surface
Penetrate mirror 6；The fibre-optical probe 15 is connected by optical fiber 16 with spectrometer 17；The OPO condenser lenses 21 are mounted on guide post 11,
Guide post 11 is mounted on sliding block 10, and sliding block 10 is placed on guide rail 9, passes through sliding block 10 and 11 three-dimensional regulation OPO condenser lenses of guide post
21 positions；The three-wavelength laser 1, OPO lasers 23, spectrometer 17 are controlled respectively by the first control cable 25, second
Cable the 24, the 3rd controls cable 20 to be connected with digital delay generator 22；The plasma 5 gathers achromatism by plasma
Lens group 13 is collected after focusing on by fibre-optical probe 15 again, and fibre-optical probe 15 transmits the plasma beam 14 of acquisition through optical fiber 16
To spectrometer 17, the spectral signal of reception is converted to electric signal and is transferred to computer by the 4th control cable 19 by spectrometer 17
18；And OPO laser beams 12, the plasma 5 that OPO lasers 23 are generated with OPO condenser lenses 21 are in same plane always.
In the present embodiment, the spectrometer 17 is integrated with enhanced CCD (ICCD) detector that pixel is 1024x256,
Spectral resolution higher.
In the present embodiment, the Two Dimensional Rotating platform 7 accurately controls angular speed, linear velocity, the acceleration of rotation, with
Meet pulse laser beam 2 and uniformly impact the uniformity that defocusing amount on 8 surface of pork sample, is effectively ensured.
In the present embodiment, the physics pre-treatments such as the pork sample 8 is vacuum dried, crushing, sieving, tabletting, with control
Its granularity, flatness, degree of adhesion, conjugation are made, and then improves it and detects stability, accuracy, before complicated sample
Processing, processing detection process is simple, green.
In the present embodiment, the pork sample 8 of dry tabletting is carried out using pulse laser beam 2 ablation breakdown generate etc. from
Output of laser wavelength is then adjusted to the resonant excitation wavelength of Elements Atom to be measured by daughter 5 by OPO lasers 23, so as to special
Sign enhances Elements Atom the intensity of spectral line to be measured, and laser induced breakdown spectroscopy sensitivity is greatly improved, realizes to object element atom
Particular excitation increases substantially detection sensitivity；OPO condenser lenses 21 3 are controlled by adjusting guide rail 9, sliding block 10, guide post 11
The movement of dimension space position, so that OPO laser beams 12 focus on 5 center of plasma, Elements Atom to be measured absorbs energy
Transition is measured, emits fluorescence spectrum；Space constraint is carried out by 6 plasma 5 of spherical reflector, so that as much as possible etc.
Gas ions 5 are collected by fibre-optical probe 15 after being focused on by plasma acquisition achromatic lens group 13 and are transferred to spectrometer 17, into
And detection sensitivity is improved, using plasma acquisition achromatic lens group 13 can meet spherical aberration and coma requirement, realize minimum
Aberration requirement, transmission peak wavelength scope is wider, and so as to reduce plasma dissipation, the spectral signal received is converted by spectrometer 17
Computer 18 is transmitted to after electric signal, meanwhile, digital delay generator 22 accurately controls the adjustable three-wavelength lasers 1 of Nd-YAG, OPO
Sequential relationship between laser 23, spectrometer 17, the spectrum detected by computer 18 to pork sample 8 are compared, so as to real
Now quick, accurate, green test.
The basic principle of the utility model and main feature and the advantages of the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Simply illustrate the principle of the utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
Various changes and modifications are had, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed scope is defined by the appending claims and its equivalent thereof.
Claims (8)
1. using the device of tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution, swash including adjustable three wavelength
Light device, high reflection mirror, sample condenser lens, spherical reflector, Two Dimensional Rotating platform, position adjusting mechanism, plasma acquisition
Achromatic lens group, fibre-optical probe, spectrometer, processing terminal, OPO condenser lenses, digital delay generator and OPO lasers,
It is characterized in that, the pulse laser beam of the adjustable three-wavelength laser output is in same plane with high reflection mirror, and it is high anti-
45 ° of the horizontal direction that mirror is located at adjustable three-wavelength laser is penetrated, sample condenser lens is arranged on immediately below high reflection mirror；Described two
Dimension rotating platform is placed in immediately below sample condenser lens, is placed with to be burnt by pulse laser beam on Two Dimensional Rotating platform
Erosion breakdown generates the pork sample of plasma；It is adopted equipped with the adjustable plasma of acquisition angles Two Dimensional Rotating platform oblique upper
Collect achromatic lens group, spherical reflector is arranged on Two Dimensional Rotating platform rear；The fibre-optical probe is placed in plasma acquisition
The oblique upper of achromatic lens group, and be connected with spectrometer, spectrometer is connected with processing terminal；The OPO condenser lenses installation
On position adjusting mechanism；The three-wavelength laser, OPO lasers, spectrometer are connected respectively with digital delay generator；Together
When OPO lasers and OPO condenser lenses the OPO laser beams, the plasma that generate be in same plane always.
2. the dress according to claim 1 using tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution
It puts, which is characterized in that the adjustable three-wavelength laser is the adjustable three-wavelength lasers of Nd-YAG.
3. the dress according to claim 1 using tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution
It puts, which is characterized in that the spectrometer is integrated with the enhanced ccd detector that pixel is 1024x256.
4. the dress according to claim 1 using tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution
It puts, which is characterized in that the fibre-optical probe is connected by optical fiber with spectrometer.
5. the dress according to claim 1 using tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution
It puts, which is characterized in that the position adjusting mechanism includes guide rail, sliding block and guide post, and OPO condenser lenses are mounted on guide post, lead
Column is mounted on sliding block, and sliding block is placed on guide rail.
6. the dress according to claim 1 using tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution
It puts, which is characterized in that the three-wavelength laser passes through the second control cable, spectrum by the first control cable, OPO lasers
Instrument is connected by the 3rd control cable with digital delay generator.
7. the dress according to claim 1 using tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution
It puts, which is characterized in that the Two Dimensional Rotating platform includes disk and shaft, and shaft is mounted on disk bottom.
8. the dress according to claim 1 using tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution
It puts, which is characterized in that the plasma acquisition achromatic lens group includes two panels achromatic lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721558881.4U CN207379928U (en) | 2017-11-21 | 2017-11-21 | Utilize the device of tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721558881.4U CN207379928U (en) | 2017-11-21 | 2017-11-21 | Utilize the device of tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution |
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| Publication Number | Publication Date |
|---|---|
| CN207379928U true CN207379928U (en) | 2018-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721558881.4U Expired - Fee Related CN207379928U (en) | 2017-11-21 | 2017-11-21 | Utilize the device of tunable resonance laser induced breakdown spectroscopy detection pork heavy metal distribution |
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| CN (1) | CN207379928U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764794A (en) * | 2017-11-21 | 2018-03-06 | 江西农业大学 | Utilize the device of tunable resonance LIBS detection pork heavy metal distribution |
| CN114509426A (en) * | 2022-02-23 | 2022-05-17 | 西北师范大学 | Device and method for detecting heavy metal elements in liquid by LIBS-GD combination |
-
2017
- 2017-11-21 CN CN201721558881.4U patent/CN207379928U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764794A (en) * | 2017-11-21 | 2018-03-06 | 江西农业大学 | Utilize the device of tunable resonance LIBS detection pork heavy metal distribution |
| CN114509426A (en) * | 2022-02-23 | 2022-05-17 | 西北师范大学 | Device and method for detecting heavy metal elements in liquid by LIBS-GD combination |
| CN114509426B (en) * | 2022-02-23 | 2024-04-26 | 西北师范大学 | LIBS-GD combined device and method for detecting heavy metal elements in liquid |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180518 Termination date: 20181121 |