CN114486853A - Food Raman spectrum detection amplifying instrument capable of resisting interference - Google Patents
Food Raman spectrum detection amplifying instrument capable of resisting interference Download PDFInfo
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- CN114486853A CN114486853A CN202210120279.1A CN202210120279A CN114486853A CN 114486853 A CN114486853 A CN 114486853A CN 202210120279 A CN202210120279 A CN 202210120279A CN 114486853 A CN114486853 A CN 114486853A
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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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
Abstract
The invention provides a food Raman spectrum detection amplifying instrument capable of resisting interference, and relates to the technical field of spectrum detection amplifying instruments. The invention controls the abutting rod to move and separate or abut against the abutting hole, thereby completing the adjustment of the position of the light barrier, reducing the irradiation of an external light source to a sample, changing the rotation angle of the light barrier and being used for blocking part of the interference of the external light source.
Description
Technical Field
The invention relates to the technical field of spectrum detection amplifying instruments, in particular to a food Raman spectrum detection amplifying instrument capable of resisting interference.
Background
Along with the continuous development of economy, people's lives are enriched by various processed foods full of Linglan, food safety and human health are increasingly emphasized by society, food safety detection is more necessary, a spectrum detector based on food safety detection is commonly used, and the spectrum detector is also called as a spectrum detection amplifying instrument, mainly used for amplifying and detecting a spectrum, so that the effect of ensuring the safety of foods and the like is achieved. When the spectrum detector is used, a small sample needs to be taken and placed on the detection table, and the sample is detected through the spectrum detector.
If the application number is: CN202121747780.8 provides a full spectrum detector based on food safety detection, which comprises a main body, wherein a crushing box for placing a sample is connected to the inside of the left side of the main body in a sliding manner, a fixed shaft is arranged inside the left side of the main body, the outer side of the fixed shaft is rotatably connected with a ring sleeve, and a placing rack for placing a plurality of test tubes into equipment at the same time is arranged at the upper end of the main body; however, in the above technical scheme, in the using process, the following problems may be encountered, for example, in the using process of the spectrum detector, because some light blocking structures are absent, in the detecting process, external light is prone to cause interference to the irradiation of too much sample, and further a detection link is prone to making mistakes, and certain influence is brought to the detecting process of the spectrum detector inconveniently, so we propose a food raman spectrum detection amplifying instrument capable of resisting interference to solve the above problems.
Disclosure of Invention
Technical problem to be solved
The invention provides a food Raman spectrum detection amplifying instrument capable of resisting interference, and aims to solve the problems that in the use process of a spectrum detector in the prior art, due to the lack of some light blocking structures, external light easily interferes with the irradiation of a sample too much, so that the detection link is easy to make mistakes, and the detection process of the spectrum detector is affected to a certain extent and is inconvenient.
(II) technical scheme
In order to achieve the purpose, the invention adopts the technical scheme that:
a food Raman spectrum detection amplifying instrument capable of resisting interference comprises a supporting frame, wherein one end of the supporting frame, which is far away from a workbench, is provided with a mounting groove, a spectrum detection amplifying instrument body is mounted inside the mounting groove, a first round block is mounted on the periphery of the lower end of the spectrum detection amplifying instrument body through a first bolt, a connecting cylinder is fixedly mounted on the lower surface of the first round block, a plurality of abutting holes are fixedly formed in the periphery of the connecting cylinder, a second round block is fixedly mounted on the lower surface of the connecting cylinder, sliding grooves are respectively formed in the ends, which are close to the connecting cylinder, of the second round block and the first round block, a pin rod assembly is arranged inside the sliding grooves, the pin rod assembly comprises an abutting rod and a connecting frame, one end of the abutting rod penetrates through the connecting frame, two ends of the connecting frame are fixedly connected with sliding rods, and connecting rods are fixedly mounted on the peripheries of the two sliding rods, the one end of connecting rod is provided with spring assembly, spring assembly is including drawing piece and connecting rod, draw the piece and establish with the connecting rod cover and be connected, the lower extreme fixed mounting of connecting rod has the barn door.
Preferably, the lower fixed surface of workstation installs the landing leg, the last fixed surface of workstation installs the fixed block, the last fixed surface of fixed block connects the support frame, the support frame is bent shape and sets up.
Preferably, the lower surface of the supporting frame is fixedly provided with fixing frames, the inner sides of the two fixing frames are fixedly connected with the spectrum detection amplifier body through second bolts, and the periphery of the spectrum detection amplifier body is tightly abutted to the inner wall of the mounting groove.
Preferably, a pull ring is fixedly mounted at one end of the abutting rod, one end, far away from the pull ring, of the abutting rod abuts against the inside of the abutting hole, and the abutting holes are distributed in the shape of a ring at the center of the connecting cylinder.
Preferably, a connecting block is fixedly mounted at one end of the abutting rod, one end surface of the connecting block is fixedly connected with a first spring, one end of the first spring is fixedly connected with the connecting frame, and the first spring is sleeved with the abutting rod and connected with the abutting rod.
Preferably, the link is arc-shaped, a through groove is formed in the link, and the upper end and the lower end of the sliding rod are both connected with the inner wall of the sliding groove in a sliding manner.
Preferably, the two slide bars are symmetrical about the center of the first circular block, the upper end of the pull block is fixedly connected with the lower end of the second spring, the lower surface of the pull block abuts against the upper surface of the mounting block, the upper end of the second spring is fixedly connected with the lower surface of the ejector block, a through hole is formed in the pull block, a guide rod is slidably connected inside the through hole, and the upper end of the guide rod is fixedly connected with the ejector block.
Preferably, the lower surface of the top block is fixedly connected with the upper end of the connecting rod, and the connecting rod is sleeved with the second spring.
Preferably, one end, far away from the top block, of the connecting rod is fixedly connected with the bottom block, the upper surface of the bottom block is abutted against the lower surface of the mounting block, an opening is formed in the mounting block, and the connecting rod penetrates through the opening.
Preferably, the two light barriers are symmetrical about the center of the first circular block, the two light barriers are obliquely arranged, and a reflective film is fixedly mounted inside the two light barriers through a third bolt.
Compared with the prior art, the invention has the following beneficial effects:
the invention can drive the abutting rod and the connecting block to move after the pull ring is pulled, the connecting block can pull the first spring to generate a reaction force, meanwhile, the abutting rod can be separated from the abutting hole and cannot abut against the abutting hole any more, at the moment, the connecting frame can be rotated to drive the sliding rod to slide in the sliding groove, so that the connecting frame can move circularly, the light barrier is driven to move circularly by the connecting rod and the spring assembly in the center of the first circular block during the circular motion of the connecting frame, after the position of the light barrier is determined, the pull ring is loosened to enable the first spring to pull the abutting rod to return through the connecting block and abut against the inner part of the abutting hole again, so that the position of the light barrier is fixed, the irradiation of an external light source to a sample is reduced, the rotating angle of the light barrier is changed by arranging the baffle, and adjusting the light barrier, and the rotating angle of the light barrier is used for blocking part of the interference of the external light source;
upwards pulling draws the piece and removes on the connecting rod and promote the second spring compression simultaneously and produce reaction force, draw the piece and remove no longer to support tightly with the upper surface of installation piece, rotatable connecting rod drives the barn door and rotates this moment, to the angle modulation of barn door, block the light source of appointed angle, loosen and draw a piece second spring and can promote to draw the piece playback and support tightly with the installation piece, fixed barn door angle after rotating, reach the nimble regulation of barn door angle, better block the light source, the reflectance coating can rotate along with it when the barn door rotates simultaneously, be used for reflecting the light that spectrum detection enlarger body sent, reduce the condition of spectrum detection enlarger body light dispersion.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a food Raman spectrum detection amplifying instrument capable of resisting interference according to the invention;
FIG. 2 is a schematic diagram of a rear view of a Raman spectrum detection amplifying apparatus for food capable of resisting interference according to the present invention;
FIG. 3 is a schematic diagram of a pin rod assembly of the interference-resistant food Raman spectrum detection amplifying instrument according to the present invention;
FIG. 4 is a schematic view of the connection structure of the pin rod assembly and the connecting cylinder of the interference-resistant food Raman spectrum detection amplifying instrument;
FIG. 5 is an enlarged view of the food Raman spectrum detection amplifying apparatus capable of resisting interference according to the present invention at a position a;
FIG. 6 is a schematic diagram of a spring assembly of a Raman spectrum detection amplifying apparatus for food capable of resisting interference according to the present invention;
fig. 7 is a schematic diagram of an enlarged structure at b of the food raman spectrum detection amplifying instrument capable of resisting interference.
In the figure: 1. a support leg; 2. a work table; 3. a fixed block; 4. a support frame; 5. mounting grooves; 6. a pin rod assembly; 601. a pull ring; 602. a tightening rod; 603. connecting blocks; 604. a first spring; 605. a connecting frame; 606. a through groove; 607. a slide bar; 7. a first bolt; 8. a spring assembly; 801. pulling the block; 802. a second spring; 803. a top block; 804. a connecting rod; 805. a bottom block; 806. mounting blocks; 807. an opening; 808. a through hole; 809. a guide bar; 9. a connecting cylinder; 10. a second circular block; 11. a chute; 12. a spectrum detection amplifier body; 13. a connecting rod; 14. a first circular block; 15. a light barrier; 16. a second bolt; 17. a fixed mount; 18. abutting the hole; 19. a third bolt; 20. a reflective film.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
As shown in fig. 1 to 7, a food raman spectrum detection amplifying instrument capable of resisting interference comprises a supporting frame 4, one end of the supporting frame 4 far away from a worktable 2 is provided with a mounting groove 5, a spectrum detection amplifying instrument body 12 is installed inside the mounting groove 5, a first circular block 14 is installed at the periphery of the lower end of the spectrum detection amplifying instrument body 12 through a first bolt 7, a connecting cylinder 9 is fixedly installed at the lower surface of the first circular block 14, a plurality of abutting holes 18 are fixedly formed at the periphery of the connecting cylinder 9, a second circular block 10 is fixedly installed at the lower surface of the connecting cylinder 9, a sliding groove 11 is respectively formed inside one end of the second circular block 10 and one end of the first circular block 14 close to the connecting cylinder 9, a pin rod assembly 6 is arranged inside the sliding groove 11, the pin rod assembly 6 comprises an abutting rod 602 and a connecting frame 605, one end of the abutting rod 602 penetrates through the connecting frame 605, both ends of the connecting frame 605 are fixedly connected with a sliding rod 607, the periphery of the two sliding rods 607 is fixedly provided with a connecting rod 13, one end of the connecting rod 13 is provided with a spring assembly 8, the spring assembly 8 comprises a pulling block 801 and a connecting rod 804, the pulling block 801 is sleeved with the connecting rod 804, and the lower end of the connecting rod 804 is fixedly provided with a light barrier 15.
In this application, the lower fixed surface of workstation 2 installs landing leg 1, and the last fixed surface of workstation 2 installs fixed block 3, and the last fixed surface of fixed block 3 connects support frame 4, and support frame 4 is bent shape and sets up. The lower surface fixed mounting of support frame 4 has mount 17, and the inboard of two mount 17 passes through second bolt 16 and spectrum detection amplifier body 12 fixed connection, and the periphery of spectrum detection amplifier body 12 supports tightly with the inner wall of mounting groove 5.
It should be noted that, spectrum detection enlargies appearance body 12 before taking off, the accessible is twisted and is moved first bolt 7 and make spectrum detection enlargies appearance body 12 and mount 17 separation, directly pull out spectrum detection enlargies appearance body 12 alright, the accessible places the sample in the top of workstation 2 before detecting, if the volume of sample is less, the accessible adds the device platform on workstation 2, makes the sense terminal of sample be in between two barn doors 15, improves the result of use of barn door 15 like this.
In the present application, a pull ring 601 is fixedly installed at one end of the tightening rod 602, which is far away from the pull ring 601, is tightened with the inside of the tightening hole 18, and the tightening holes 18 are annularly distributed in the center of the connecting cylinder 9. The one end fixed mounting that supports tight pole 602 has connecting block 603, the one end surface and the first spring 604 fixed connection of connecting block 603, the one end and the link 605 fixed connection of first spring 604, first spring 604 establishes with supporting tight pole 602 cover and is connected. The connecting frame 605 is arc-shaped, the inside of the connecting frame 605 is provided with a through groove 606, and the upper end and the lower end of the sliding rod 607 are both connected with the inner wall of the sliding groove 11 in a sliding manner.
It should be noted that, by adjusting the light barrier 15, the rotation angle of the light barrier 15 is changed, so as to block a part of light source interference outside, in the first step, the pull ring 601 is pulled, the tightening rod 602 and the connecting block 603 are driven to move after the pull ring 601 is pulled, the connecting block 603 moves to pull the first spring 604 to generate a reaction force, meanwhile, the tightening rod 602 moves to separate from the tightening hole 18 and no longer tightens, at this time, the rotatable connecting frame 605 drives the sliding rod 607 to slide inside the sliding slot 11, so that the connecting frame 605 moves circumferentially, the connecting rod 13 and the spring assembly 8 drive the light barrier 15 to move circumferentially around the center of the first circular block 14 during the circumferential motion of the connecting frame 605, after the position of the light barrier 15 is determined, the pull ring 601 is released to allow the first spring 604 to pull the tightening rod 602 through the connecting block 603 to return to be tightened again inside the tightening hole 18, so as to complete the fixing of the position of the light barrier 15, the irradiation of the external light source to the sample is reduced, and it should be further noted that when the connecting frame 605 rotates and the abutting rod 602 resets and abuts inside the abutting hole 18 again, the situation that one end of the abutting rod 602 abuts inside the abutting hole 18 can be seen through the through groove 606, and the resetting of the abutting rod 602 and the abutting inside the abutting hole 18 are controlled more accurately.
In the application, two sliding rods 607 are symmetrical about the center of the first circular block 14, the upper end of the pulling block 801 is fixedly connected with the lower end of the second spring 802, the lower surface of the pulling block 801 is abutted against the upper surface of the mounting block 806, the upper end of the second spring 802 is fixedly connected with the lower surface of the top block 803, a through hole 808 is formed in the pulling block 801, a guide rod 809 is slidably connected inside the through hole 808, and the upper end of the guide rod 809 is fixedly connected with the top block 803. The lower surface of the top block 803 is fixedly connected with the upper end of the connecting rod 804, and the connecting rod 804 is sleeved with the second spring 802. One end of the connecting rod 804 far away from the top block 803 is fixedly connected with the bottom block 805, the upper surface of the bottom block 805 is tightly abutted against the lower surface of the mounting block 806, an opening 807 is formed in the mounting block 806, and the inside of the opening 807 penetrates through the connecting rod 804. The two light barriers 15 are symmetrical about the center of the first circular block 14, the two light barriers 15 are obliquely arranged, and the reflective film 20 is fixedly mounted inside the two light barriers 15 through a third bolt 19.
It should be noted that, the pulling block 801 is pulled upwards to move on the connecting rod 804 and push the second spring 802 to compress to generate a reaction force, the pulling block 801 moves to be not tightly abutted to the upper surface of the mounting block 806, at this time, the connecting rod 804 can be rotated to drive the light barrier 15 to rotate, the angle of the light barrier 15 is adjusted, a light source at a specified angle is blocked, the second spring 802 which releases the pulling block 801 can push the pulling block 801 to return to be tightly abutted to the mounting block 806, the rotated angle of the light barrier 15 is fixed, the angle of the light barrier 15 is flexibly adjusted, the light source is better blocked, meanwhile, the reflective film 20 rotates along with the light barrier 15 when the light barrier 15 rotates, and is used for reflecting the light emitted by the spectrum detection amplifier body 12 and reducing the situation of light dispersion of the spectrum detection amplifier body 12, it should be explained that the pulling block 801 slides on the guide rod 809 through the through hole 808 when moving, the guide rod 809 is used for guiding the pulling block 801, and simultaneously preventing the pulling block 801 from accidentally rotating, when the light barrier 15 needs to be maintained and cleaned, the pulling block 801 can be moved upwards, and then the pulling block 801 drives the connecting rod 804 to move out of the opening 807, so that the spring assembly 8 and the light barrier 15 can be moved out.
The working principle of the interference-resistant food Raman spectrum detection amplifying instrument is as follows:
firstly, in the detection process, the rotation angle of the light barrier 15 can be changed by adjusting the light barrier 15, and the rotation angle is used for blocking a part of external light source interference, in the first step, the pull ring 601 can be pulled, the tightening rod 602 and the connecting block 603 can be driven to move after the pull ring 601 is pulled, the connecting block 603 can be driven to move, the first spring 604 can be driven to generate a reaction force, meanwhile, the tightening rod 602 can be separated from the tightening hole 18 and can not be tightened, at the moment, the rotatable connecting frame 605 can drive the sliding rod 607 to slide in the sliding chute 11, the connecting frame 605 can move circularly, the light barrier 15 can be driven to move circularly by the connecting rod 13 and the spring assembly 8 in the circular motion of the connecting frame 605 through the central circular motion of the first circular block 14, after the position of the light barrier 15 is determined, the pull ring 601 is released, the first spring 604 can be pulled to return to the tightening rod 602 through the connecting block 603 and can be tightened again in the tightening hole 18, and the position of the light barrier 15 is fixed, the irradiation of an external light source to the sample is reduced;
meanwhile, the pulling block 801 can be pulled upwards to move on the connecting rod 804 and push the second spring 802 to compress to generate a reaction force, the pulling block 801 moves to be not tightly abutted with the upper surface of the mounting block 806, the connecting rod 804 can be rotated to drive the light barrier 15 to rotate at the same time, the angle of the light barrier 15 is adjusted, a light source at a specified angle is blocked, the pulling block 801 is loosened, the second spring 802 can push the pulling block 801 to return to be tightly abutted with the mounting block 806, the rotated angle of the light barrier 15 is fixed, the angle of the light barrier 15 is flexibly adjusted, the light source is better blocked, meanwhile, the reflecting film 20 can rotate along with the light barrier 15 when the light barrier 15 rotates, the light emitted by the spectrum detection amplifier body 12 is reflected, and the condition that light of the spectrum detection amplifier body 12 is dispersed is reduced.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A food Raman spectrum detection amplifying instrument capable of resisting interference comprises a support frame (4), and is characterized in that: the end, far away from the workbench (2), of the support frame (4) is provided with a mounting groove (5), the inside of the mounting groove (5) is provided with a spectrum detection amplification instrument body (12), the periphery of the lower end of the spectrum detection amplification instrument body (12) is provided with a first round block (14) through a first bolt (7), the lower surface of the first round block (14) is fixedly provided with a connecting cylinder (9), the periphery of the connecting cylinder (9) is fixedly provided with a plurality of abutting holes (18), the lower surface of the connecting cylinder (9) is fixedly provided with a second round block (10), the insides of one ends, close to the connecting cylinder (9), of the second round block (10) and the first round block (14) are both provided with a sliding groove (11), the inside of the sliding groove (11) is provided with a pin rod assembly (6), the pin rod assembly (6) comprises an abutting rod (602) and a connecting frame (605), link (605) is passed to the one end of propping tight pole (602), the both ends of link (605) all with slide bar (607) fixed connection, two the peripheral fixed mounting of slide bar (607) has connecting rod (13), the one end of connecting rod (13) is provided with spring assembly (8), spring assembly (8) are including drawing piece (801) and connecting rod (804), draw piece (801) and connecting rod (804) cover and establish and be connected, the lower extreme fixed mounting of connecting rod (804) has barn door (15).
2. The food Raman spectrum detection amplification instrument capable of resisting interference according to claim 1, wherein: the lower fixed surface of workstation (2) installs landing leg (1), the last fixed surface of workstation (2) installs fixed block (3), the last fixed surface of fixed block (3) connects support frame (4), support frame (4) are curved shape and set up.
3. The food Raman spectrum detection amplification instrument capable of resisting interference according to claim 1, wherein: the lower fixed surface of support frame (4) installs mount (17), two the inboard of mount (17) is through second bolt (16) and spectrum detection amplifier body (12) fixed connection, the periphery of spectrum detection amplifier body (12) supports tightly with the inner wall of mounting groove (5).
4. The food Raman spectrum detection amplification instrument capable of resisting interference according to claim 1, wherein: one end of the abutting rod (602) is fixedly provided with a pull ring (601), one end, far away from the pull ring (601), of the abutting rod (602) abuts against the inside of the abutting hole (18), and the abutting holes (18) are distributed in a central ring shape of the connecting cylinder (9).
5. The food Raman spectrum detection amplifying instrument capable of resisting interference according to claim 4, wherein: the one end fixed mounting who supports tight pole (602) has connecting block (603), the one end surface and first spring (604) fixed connection of connecting block (603), the one end and link (605) fixed connection of first spring (604), first spring (604) and support tight pole (602) cover and establish and be connected.
6. The food Raman spectrum detection amplification instrument capable of resisting interference according to claim 1, wherein: the connecting frame (605) is arranged in an arc shape, the through groove (606) is formed in the connecting frame (605), and the upper end and the lower end of the sliding rod (607) are both connected with the inner wall of the sliding groove (11) in a sliding mode.
7. The food Raman spectrum detection amplification instrument capable of resisting interference according to claim 1, wherein: the two sliding rods (607) are symmetrical about the center of the first round block (14), the upper end of the pulling block (801) is fixedly connected with the lower end of the second spring (802), the lower surface of the pulling block (801) is tightly abutted to the upper surface of the mounting block (806), the upper end of the second spring (802) is fixedly connected with the lower surface of the ejector block (803), a through hole (808) is formed in the pulling block (801), a guide rod (809) is connected to the inside of the through hole (808) in a sliding manner, and the upper end of the guide rod (809) is fixedly connected with the ejector block (803).
8. The food Raman spectrum detection amplifying instrument capable of resisting interference according to claim 7, wherein: the lower surface of the top block (803) is fixedly connected with the upper end of a connecting rod (804), and the connecting rod (804) is sleeved with a second spring (802).
9. The food raman spectrum detection amplifying instrument capable of resisting interference according to claim 8, wherein: one end, far away from the top block (803), of the connecting rod (804) is fixedly connected with the bottom block (805), the upper surface of the bottom block (805) is abutted against the lower surface of the mounting block (806), an opening (807) is formed in the mounting block (806), and the connecting rod (804) penetrates through the opening (807).
10. The food Raman spectrum detection amplification instrument capable of resisting interference according to claim 1, wherein: the two light barriers (15) are symmetrical with the center of the first round block (14), the two light barriers (15) are obliquely arranged, and a reflecting film (20) is fixedly arranged in the two light barriers (15) through a third bolt (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210120279.1A CN114486853B (en) | 2022-02-09 | 2022-02-09 | Food Raman spectrum detection amplifying instrument capable of resisting interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210120279.1A CN114486853B (en) | 2022-02-09 | 2022-02-09 | Food Raman spectrum detection amplifying instrument capable of resisting interference |
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| CN114486853A true CN114486853A (en) | 2022-05-13 |
| CN114486853B CN114486853B (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210120279.1A Active CN114486853B (en) | 2022-02-09 | 2022-02-09 | Food Raman spectrum detection amplifying instrument capable of resisting interference |
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| CN114486853B (en) | 2022-11-18 |
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