CN117388207A - Liquid spectrum acquisition equipment - Google Patents
Liquid spectrum acquisition equipment Download PDFInfo
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- CN117388207A CN117388207A CN202311265819.6A CN202311265819A CN117388207A CN 117388207 A CN117388207 A CN 117388207A CN 202311265819 A CN202311265819 A CN 202311265819A CN 117388207 A CN117388207 A CN 117388207A
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- 239000007788 liquid Substances 0.000 title claims abstract description 145
- 238000001228 spectrum Methods 0.000 title claims abstract description 40
- 239000013307 optical fiber Substances 0.000 claims abstract description 38
- 239000013074 reference sample Substances 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 description 20
- 238000001514 detection method Methods 0.000 description 15
- 230000001105 regulatory effect Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
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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
-
- 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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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides liquid spectrum acquisition equipment, which comprises a shell, a light path system, a liquid constant temperature system and a liquid path system, wherein the light path system comprises a light source component, a one-to-two optical fiber, a reference acquisition module, a two-to-one optical fiber, a spectrometer, a first input collimator, a first output collimator, a second input collimator and a second output collimator; the reference acquisition module comprises a reference sample assembly and a switching assembly, wherein the reference sample assembly comprises a fixing frame fixedly arranged in the shell, a cuvette fixedly arranged on the fixing frame and a reference plate, the switching assembly comprises a switching disc capable of rotating relative to the fixing frame, an acquisition hole and a standard sheet which are arranged on the switching disc, and the first input collimator and the first output collimator are opposite to each other and are arranged opposite to the cuvette; the second input collimator and the second output collimator are arranged opposite to each other and are arranged opposite to the reference plate; the liquid path system comprises a hose bundle communicated with the cuvette, the liquid constant temperature system comprises an incubator, and the hose bundle is arranged in the incubator in a penetrating way. The structure has better precision.
Description
Technical Field
The invention relates to the field of near infrared spectrum detection, in particular to liquid spectrum acquisition equipment.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
Near infrared spectrometers can be used to collect spectra of liquids to analyze the composition of the liquid, such as organic, inorganic, biological macromolecules, and the like. The wavelength range of the near infrared spectrum may be approximately between 700-2500 nm.
Currently, the precision of near infrared spectrometers is always a technical problem to be solved by those skilled in the art.
It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present invention and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the invention section.
Disclosure of Invention
Based on the defects in the prior art, the liquid spectrum acquisition equipment is used for solving the defect of poor precision in liquid spectrum acquisition in the prior art.
The inventor repeatedly researches and tests to find that the reasons of poor acquisition precision of the liquid spectrum equipment in the prior art are the system stability problem caused by the movement of optical path parts and the system temperature fluctuation problem caused by blowing air to the coil pipe of the liquid to keep constant temperature by using a fan. These two problems act together to result in a liquid spectroscopic apparatus whose acquisition accuracy has been in an undesirable state.
In order to achieve the above object, the present invention provides the following technical solutions: the liquid spectrum acquisition equipment comprises a shell, a light path system, a liquid constant temperature system and a liquid path system, wherein the light path system is arranged in the shell, and comprises a light source assembly, a one-to-two optical fiber, a reference acquisition module, a two-to-one optical fiber, a spectrometer, a first input collimator, a first output collimator, a second input collimator and a second output collimator; the light source component is connected with the input ends of the one-to-two optical fibers, the two output ends of the one-to-two optical fibers are respectively connected with the first input collimator and the second input collimator, the output ends of the two-to-one optical fibers are respectively connected with the first output collimator and the second output collimator, the reference acquisition module comprises a reference sample component and a switching component, the reference sample component comprises a fixing frame fixedly arranged in the shell, a cuvette and a reference plate fixedly arranged on the fixing frame, the switching component comprises a switching disc capable of rotating relative to the fixing frame, an acquisition hole and a standard plate which are arranged on the switching disc, the first input collimator and the second input collimator are fixedly arranged on one side of the switching disc, which is opposite to the fixing frame, the first output collimator and the second output collimator are fixedly arranged on one side of the fixing frame, which is opposite to the switching disc, and the first input collimator and the first cuvette are opposite to the first cuvette; the second input collimator and the second output collimator are arranged opposite to each other and are arranged opposite to the reference plate; the liquid path system comprises a hose bundle communicated with the cuvette, the liquid constant temperature system comprises a constant temperature box, the hose bundle is arranged in the constant temperature box in a penetrating mode, the liquid spectrum acquisition equipment at least has a first working state, a second working state and a third working state under the action of movement of the switching disc, and the standard sheet and the reference plate are in a right-facing position in the first working state; in a second working state, the collecting hole and the reference plate are positioned at opposite positions; in a third working state, the collecting hole and the cuvette are in a right-facing position.
Preferably, the liquid spectrum acquisition device further has a fourth operating state in which either of the reference plate and cuvette and either of the standard plate and the acquisition well are in a fully staggered position.
Preferably, the reference plate and the cuvette are arranged in a circumferential direction with a rotation center of the switching plate, and the standard plate and the collection hole are arranged in a circumferential direction with a rotation center of the switching plate.
Preferably, the hose bundle is disposed circuitously within the oven.
Preferably, a gas-liquid separator is arranged between the hose bundle and the cuvette.
Preferably, the liquid path system comprises a liquid inlet pipe and a liquid outlet pipe which are respectively communicated with the inlet end and the outlet end of the cuvette, the liquid inlet pipe is positioned below the cuvette, and the liquid outlet pipe is positioned above the cuvette.
Preferably, the rotation center of the switching disc is used as a circle center, a first arc line is formed between the circle center of the collecting hole and the circle center of the cuvette, a second arc line is formed between the circle center of the standard sheet and the circle center of the collecting hole, and the first arc line and the second arc line are overlapped.
Preferably, the aperture of the collection well is larger than the aperture of the cuvette, which is larger than the apertures of the standard plate and the reference plate.
Preferably, the output end of the two-in-one optical fiber is provided with an installation positioning structure, so that the two centrally arranged fiber cores are aligned with the center of the slit of the spectrometer and are both positioned at the center of the slit.
Preferably, two fiber cores in the two-in-one optical fiber are arranged in a central and tight mode, and the sum of fiber diameters of the two fiber cores is smaller than the slit of the spectrometer.
By the technical scheme, the invention has the beneficial effects that:
1. the acquisition precision of the spectrum acquisition equipment is high, for example, the repeatability (stability) is improved by more than 2 times (from original 0.001AU to within 0.0005 AU); for another example, the concentration accuracy is improved by more than 2 times (from 1% ± 0.05% to 1% ± 0.01%);
2. the light path stability of the spectrum acquisition equipment is high;
3. the flowing time of a detection light path for detecting the liquid is greatly reduced, the time delay effect of a detection result is obviously shortened, and the result time delay is reduced by 1/2 (from more than 3 minutes to less than 1.5 minutes) by the original time delay;
4. the influence of the temperature floating of the liquid to be detected on the detection result is reduced, and the accuracy of the liquid detection result is effectively improved.
Specific embodiments of the invention are disclosed in detail below with reference to the following description and the accompanying drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope thereby. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. Those skilled in the art with access to the teachings of the present invention can select a variety of possible shapes and scale sizes to practice the present invention as the case may be. In the drawings:
fig. 1 is an external schematic view of the front side of a liquid spectrum acquisition device in an embodiment of the present application.
Fig. 2 is an external schematic view of the rear side of the liquid spectrum acquisition device in an embodiment of the present application.
Fig. 3 is a schematic diagram of an internal layout of a liquid spectrum acquisition device in an embodiment of the present application.
Fig. 4 is a schematic structural diagram of an internal key layout of a liquid spectrum acquisition device in an embodiment of the present application.
Fig. 5 mainly shows a partial schematic view of a reference acquisition module or the like.
Fig. 6 shows mainly a partial schematic view of the switching assembly.
Fig. 7 shows mainly a partial schematic view of a reference sample assembly.
Fig. 8 shows a schematic structural view of the oven and the hose bundle.
Fig. 9a shows a schematic diagram of the structure of the gas-liquid separator.
Fig. 9b shows a schematic structural view of another view of the gas-liquid separator.
Fig. 9c shows a schematic diagram of the structure of the gas-liquid separator.
Fig. 10 shows a schematic diagram of a liquid thermostat system and a liquid circuit system.
The reference numerals of the above figures are:
1. a housing; 11. a main body support module; 12. a screen support module; 13. a touch screen; 14. a power supply and communication interface; 15. a first liquid inlet port; 16. a first liquid outlet interface; 17. a second liquid inlet port; 18. a second liquid outlet interface; 19. supporting the ground feet;
2. an optical path system; 21. a light source assembly; 22. one-to-two optical fibers; 23. a reference acquisition module; 231. a motor; 2321. a first input collimator; 2322. a second input collimator; 2331. a first output collimator; 2332. a second output collimator; 234. a reference sample assembly; 2341. a fixing frame; 2342. a cuvette; 2343. a liquid inlet pipe; 2344. a liquid outlet pipe; 2345. a reference plate; 235. a support frame assembly; 236. a switching assembly; 2361. a switching plate; 2362. a collection hole; 2363. a standard piece; 2364. a magnet; 237. positioning a Hall sensor; 24. two-in-one optical fiber; 25. a spectrometer;
3. a liquid constant temperature system; 31. a water pump; 32. a constant temperature box; 33. a hose bundle; 34. a temperature sensor;
4. an electric control assembly;
5. a fluid path system; 510. a gas-liquid separator; 51. a container body; 52. a regulating body; 53. an exhaust gas regulating plug; 54. a container indicator; 530. and (3) regulating the valve.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
It should be noted that, in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and to distinguish between similar objects, and there is no order of preference between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of the invention, unless otherwise indicated, the inclusion of "a plurality" is defined as two or more.
Referring to fig. 1, 2, 3 and 4, the embodiment of the application discloses a liquid spectrum acquisition device, which comprises a shell 1, an optical path system 2, a liquid constant temperature system 3 and a liquid path system 5, wherein the optical path system 2 comprises a light source assembly 21, a two-in-one optical fiber 22, a reference acquisition mold 23, a two-in-one optical fiber 24, a spectrometer 25, a first input collimator 2321, a first output collimator 2331, a second input collimator 2322 and a second output collimator 2332; the light source assembly 21 is connected with the input ends of the optical fiber 22, the two output ends of the optical fiber 22 are respectively connected with the first input collimator 2321 and the second input collimator 2322, the output end of the optical fiber 24 is connected with the optical spectrum 25, the two input ends of the optical fiber 24 are respectively connected with the first output collimator 2331 and the second output collimator 2332, the reference acquisition mold 23 comprises a reference sample assembly 234 and a switching assembly 236, the reference sample assembly 234 comprises a fixing frame 2341 fixedly arranged in the shell 1, a cuvette 2342 fixedly arranged on the fixing frame 2341 and a reference plate 2345, the switching assembly 236 comprises a switching disc 2361 capable of rotating relative to the fixing frame 2341, an acquisition hole 2362 and a standard plate 2363 arranged on the switching disc 2361, the first input collimator 2321 and the second input collimator 2332 are fixedly arranged on one side of the switching disc 2361 opposite to the first collimator 2341 and the second collimator 2342, and the first collimator 2341 are arranged opposite to the first collimator 2341 and the second collimator 2341; the second input collimator 2322 and the second output collimator 2332 are disposed directly opposite, and are each disposed opposite the reference plate 2345; the liquid path system 5 comprises a hose bundle 33 communicated with the cuvette 2342, the liquid constant temperature system 3 comprises an incubator 32, the hose bundle 33 is arranged in the incubator 32 in a penetrating way, the liquid spectrum acquisition equipment at least comprises a first working state, a second working state and a third working state, and in the first working state, the standard sheet 2363 and the reference plate 2345 are in a right-facing position; in a second operational state, the collection aperture 2362 is in a facing position with the reference plate 2345; in the third operating state, the collection hole 2362 is located at a position opposite to the cuvette 2342.
With the above-described structure, in the embodiment of the present application, there is and only needs to switch between the respective operation states by rotating the switching disk 2361, and there is no need to move the optical path parts in order to achieve the respective states as in the prior art; meanwhile, in the embodiment of the application, the liquid in the spectrum acquisition equipment is in a constant temperature state by adopting the water in the incubator 32, so that the accuracy of component detection is improved.
Specifically, the liquid spectrum acquisition device in the embodiment of the application comprises a shell 1, a light path system 2, a liquid constant temperature system 3, an electric control assembly 4 and a liquid path system 5.
As shown in connection with fig. 1 and 2, wherein the housing 1 is the outer visible part of the liquid spectrum acquisition device. The housing 1 may include a main body support module 11, a screen support module 12 disposed on the main body support module 11, and a touch screen 13 disposed on the screen support module 12. In this embodiment, the main body supporting module 11 may further be provided with a power supply and communication interface 14, a first liquid inlet interface 15 for the liquid to be tested, a first liquid outlet interface 16 for the liquid to be tested, a second liquid inlet interface 17 for the constant temperature liquid path system 5, a second liquid outlet interface 18 for the constant temperature liquid path system 5, and supporting legs 19 for providing support to the apparatus. The liquid to be measured can flow in from the first liquid inlet 15 and flow out from the first liquid outlet 16. The cooling fluid (typically water) may flow into the incubator 32 from the second inlet port 17 and then out of the second outlet port.
Referring mainly to fig. 3 and 4, the optical path system 2 may include a light source assembly 21, a split optical fiber 22, a reference acquisition die 23, a two-in-one optical fiber 24, a spectrometer 25, a first input collimator 2321, a first output collimator 2331, a second input collimator 2322, and a second output collimator 2332. Wherein the light source assembly 21 provides a stable and reliable light source for the light path system 2. The optical fiber 22 has one input end and two output ends, wherein the light source assembly 21 is connected to the input end of the optical fiber 22, and the two output ends of the optical fiber 22 are respectively connected to the first input collimator 2321 and the second input collimator 2322, so as to collect light in the light source assembly 21 and divide the light into two identical light channels, and the two identical light channels are respectively connected to the reference collection mold 23 through the first input collimator 2321 and the second input collimator 2322.
The two-in-one fiber 24 has two input ends and one output end. The output end of the two-in-one optical fiber 24 is connected with the spectrometer 25, and the two input ends of the two-in-one optical fiber 24 are respectively connected with the first output collimator 2331 and the second output collimator 2332 so as to connect the output collimator with the spectrometer 25. The two cores in the two-in-one fiber 24 are arranged closely in the middle, and the sum of the fiber diameters of the two cores is smaller than the slit of the spectrometer 25. The output end of the two-in-one optical fiber 24 is provided with an installation positioning structure, so that the two centrally arranged fiber cores are aligned with the center of the slit of the spectrometer 25 and are both positioned at the center of the slit.
As shown in connection with fig. 5, the reference collection mold 23 includes a motor 231 controlled by the electronic control assembly 4, a reference sample assembly 234, and a switching assembly 236.
As shown in connection with fig. 7, reference sample assembly 234 includes a mount 2341, a cuvette 2342 fixedly disposed on mount 2341, and a reference plate 2345. The fixing frame 2341 is used for fixing and supporting the cuvette 2342, the liquid inlet pipe 2343 (described in detail below), the liquid outlet pipe 2344 (described in detail below) and the reference plate 2345, and forms a sealed detection liquid path channel with the liquid inlet pipe 2343, the cuvette 2342, the liquid outlet pipe 2344 and the like. The material of the reference plate 2345 is identical to that of the cuvette 2342, and is transparent optical glass meeting the optical path requirements.
As shown in connection with fig. 6, the switch assembly 236 includes a switch plate 2361, a collection aperture 2362 disposed on the switch plate 2361, and a standard tab 2363. The switch plate 2361 is rotatable about a central axis by motor 231 and a collection aperture 2362 (which is simply a suitably sized through hole) can be programmed to align with cuvette 2342 or reference plate 2345. Standard plate 2363 may be rotated onto alignment reference plate 2345 under program control.
As shown in fig. 5, the first input collimator 2321 and the second input collimator 2322 are fixedly disposed on a side of the switching disc 2361 facing away from the fixing frame 2341. The first output collimator 2331 and the second output collimator 2332 are fixedly disposed on a side of the fixing frame 2341 facing away from the switching disc 2361. The first input collimator 2321 and the first output collimator 2331 are disposed directly opposite, i.e., the first input collimator 2321 and the first output collimator 2331 are both disposed in opposing alignment with the cuvette 2342. The second input collimator 2322 and the second output collimator 2332 are disposed directly opposite, i.e., the second input collimator 2322 and the second output collimator 2332 are both disposed in opposing alignment with the reference plate 2345.
The spectrometer 25 is configured to receive the optical signal and output spectral data. The spectrometer 25 may include a thermostat to reduce the new effect of ambient temperature on the temperature of the spectrometer 25.
Referring to fig. 10, the liquid constant temperature system 3 includes an incubator 32, a water pump 31 for introducing a cooling liquid from the second liquid inlet port 17 to the incubator 32, a liquid outlet port of the incubator 32 communicating with the second liquid outlet port 18, and the incubator 32 further provided with a temperature sensor 34 at the liquid outlet port thereof. When the temperature sensor 34 senses that the temperature of the constant temperature liquid is higher or lower than the set range, the electric control assembly 4 controls the start and stop of the water pump 31 (the electric control assembly 4 can also control the water pump 31 to continuously work), so as to achieve the purpose of taking away the heat or cold of the liquid to be measured in the hose bundle 33 to keep the constant temperature. Preferably, the thermostatic liquid in the incubator 32 can be provided by a thermostatic vessel located outside the housing 1.
The liquid path system 5 may input the liquid to be measured from the first liquid inlet to the cuvette 2342 and flow out from the first liquid outlet. The liquid to be measured can be pure transparent liquid or non-viscous transparent liquid containing bubbles. Specifically, the liquid to be measured may enter the air-liquid separator 510 from the first liquid inlet 15 after entering the hose bundle 33 in the incubator 32 for constant temperature treatment. As shown in fig. 9a, 9b and 9c, the gas-liquid separator 510 includes a container body 51, a regulating body 52, a degassing regulating plug 53 and a container indicator piece 54. The liquid to be measured enters from the liquid inlet end of the side surface of the gas-liquid separator 510, and the liquid inlet end and the outlet end of the upper part are both positioned on the container body 51 and are all as close to the upper part of the container body 51 as possible; the liquid is under the influence of gravity in the bottom conditioning body 52. The container body 51, the adjusting body 52 and the exhaust adjusting plug 53 are all in a radial sealing mode, so that the adjusting body 52 and the exhaust adjusting plug 53 can be adjusted according to indexes such as gas content, time delay sensitivity and the like of different liquids to be measured. For convenience of quantitative adjustment, graduations are provided on the adjustment body 52 and the exhaust adjustment plug 53. And the adjustment body 52 indicates the value via the container indicator tab 54. The bleed control plug 53 reads the values by looking at the scale of the lateral leakage.
The liquid to be measured flowing out from the regulator 52 at the bottom of the gas-liquid separator 510 flows into the liquid inlet pipe 2343 of the cuvette 2342 through the lower part of the reference sample assembly 234, flows out from the liquid outlet pipe 2344 of the cuvette 2342, and then is converged with the gas-liquid mixture output from the upper part of the gas-liquid separator 510 into the three-way joint, and finally is discharged out of the device through the regulating valve 530. Preferably, the liquid inlet pipe 2343 is located at the lower side of the cuvette 2342, and the liquid outlet pipe 2344 is located at the upper side of the cuvette 2342, so as to prevent the gas in the pipe from being discharged cleanly when the liquid is introduced for the first time.
The electronic control assembly 4 is an integration of power supply, control, data transmission, interaction and the like of the equipment, and comprises a control board, an interface board (comprising a power supply and communication interface 14), a touch screen 13, a switch, a collection button and the like.
In a preferred embodiment, the reference acquisition die 23 may also include a support frame assembly 235. Wherein, the fixing frame 2341, the motor 231 and the positioning hall sensor 237 are all fixedly arranged on the supporting frame assembly 235. In addition, the first input collimator 2321 and the first output collimator 2331 are fixedly disposed on two sides of the support frame assembly 235, and the second input collimator 2322 and the second output collimator 2332 are fixedly disposed on two sides of the support frame assembly 235.
In a preferred embodiment, a magnet 2364 is provided on the switching disc 2361, and a positioning hall sensor 237 is fixedly provided on the support frame assembly 235. The magnet 2364 may cooperate with the positioning hall sensor 237 to determine the position of the switch plate 2361.
In summary, the optical path through cuvette 2342 is referred to as the sample collection optical path, and the optical path through reference plate 2345 is referred to as the reference optical path; the switching component 236 can enable light of at most one of the sample collection optical path and the reference optical path to pass through normally, so that interference is prevented.
The liquid spectrum acquisition device has at least several operating states:
1. calibrating an optical path: in the first working state, after the electric control assembly 4 confirms the position by positioning the hall sensor 237, the motor 231 is controlled to drive the switching disc 2361 to rotate, so that the standard sheet 2363 and the reference plate 2345 are in a right-facing position, and the light of the light source assembly 21 passes through the standard sheet 2363 and the reference plate 2345 by the one-to-two optical fibers 22 and the second input collimator 2322, passes through the second output collimator 2332 and the two-to-one optical fiber 24 and is received by the spectrometer 25, thereby achieving the calibration purpose; at this time, the light in the reference light path is in a normal passing state.
2. Optical path reference: in the second working state, after the electric control assembly 4 confirms the position by positioning the hall sensor 237, the control motor 231 drives the switching disc 2361 to rotate, so that the acquisition hole 2362 and the reference plate 2345 are in a right-facing position, and the light of the light source assembly 21 passes through the acquisition hole 2362 and the reference plate 2345 by the one-to-two optical fibers 22 and the second input collimator 2322, passes through the second output collimator 2332 and the two-to-one optical fiber 24 and is received by the spectrometer 25, thereby achieving the purpose of acquiring parameters; at this time, the light in the reference light path is in a normal passing state.
3. Dark current is adopted to light path: in the fourth operating state, after the electric control assembly 4 locates the hall sensor 237 to confirm the position, the motor 231 is controlled to drive the switching disc 2361 to rotate, so that the switching disc 2361 completely cuts off the light transmission between the first collimator and the first output collimator 2331 and the light transmission between the second collimator and the second output collimator 2332, and the dark current is collected. At this time, both the reference plate 2345 and cuvette 2342 are offset from the standard plate 2363 or collection well 2362. Thus, the light in both the sample collection and reference light paths is in an undelivered state.
4. And (3) collecting a spectrum of the liquid to be tested: in the third working state, after the light path is calibrated, dark current is collected and reference is collected, the electric control assembly 4 confirms the position by the positioning hall sensor 237, the motor 231 is controlled to drive the switching disc 2361 to rotate, the collecting hole 2362 and the cuvette 2342 are in the opposite position, the light of the light source assembly 21 passes through the collecting hole 2362, the cuvette 2342 and the pure transparent liquid processed in the cuvette 2342 by the optical fibers 22 and 2321, and is received by the spectrometer 25 after passing through the first output collimator 2331 and the optical fibers 24, and the spectrometer 25 immediately outputs the spectrum of the liquid to be measured.
As can be seen from the above operation, the optical path is switched only by the rotation of the switching disc 2361, the moving parts are few, and the movement of the optical path parts does not occur, so that the optical path stability of the spectrum acquisition system is high; the constant temperature system of the equipment adopts a liquid constant temperature mode, so that the effect is good; the length of hose bundle 33 is required to be shorter than that of the fan-coil mode; and the gas-liquid separator 510 can be adjusted to have a proper volume (reduce unnecessary volume) as much as possible by using a capacity-adjustable manner. Thus, the flowing time of a detection light path for detecting the liquid is greatly reduced, and the time delay of a detection result is obviously shortened. Meanwhile, the liquid constant temperature system 3 of the device has better constant temperature effect and more controllable temperature compared with a constant temperature mode that a fan blows air to a coil pipe for conveying liquid to be tested when the hose bundle 33 is completely immersed in constant temperature liquid. Therefore, the influence of the temperature floating of the liquid to be detected on the detection result is reduced, and the accuracy of liquid detection is effectively improved.
In this embodiment, the reference plate 2345 and the cuvette 2342 are arranged in the circumferential direction with the rotation center of the switching disk 2361, and the standard plate 2363 and the collection hole 2362 are arranged in the circumferential direction with the rotation center of the switching disk 2361. Preferably, the rotation center of the switching disc 2361 is used as a circle center, a first arc line is formed between the circle center of the collecting hole 2362 and the circle center of the cuvette 2342, a second arc line is formed between the circle center of the standard plate 2363 and the circle center of the collecting hole 2362, and the first arc line and the second arc line are overlapped. Preferably, the aperture of the collection well 2362 is larger than the aperture of the cuvette 2342, and the aperture of the cuvette 2342 is larger than the apertures of the standard plate 2363 and the reference plate 2345.
The invention has the following advantages:
1. the acquisition precision of the spectrum acquisition equipment is high, for example, the repeatability (stability) is improved by more than 2 times (from original 0.001AU to within 0.0005 AU); for another example, the concentration accuracy is improved by more than 2 times (from 1% ± 0.05% to 1% ± 0.01%);
2. the light path stability of the spectrum acquisition equipment is high;
3. the flowing time of a detection light path for detecting the liquid is greatly reduced, the time delay effect of a detection result is obviously shortened, and the result time delay is reduced by 1/2 (from more than 3 minutes to less than 1.5 minutes) by the original time delay;
4. the influence of the temperature floating of the liquid to be detected on the detection result is reduced, and the accuracy of the liquid detection result is effectively improved.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the applicant be deemed to have such subject matter not considered to be part of the disclosed subject matter.
Claims (10)
1. The liquid spectrum acquisition equipment is characterized by comprising a shell, a light path system, a liquid constant temperature system and a liquid path system, wherein the light path system is arranged in the shell and comprises a light source assembly, a one-to-two optical fiber, a reference acquisition module, a two-to-one optical fiber, a spectrometer, a first input collimator, a first output collimator, a second input collimator and a second output collimator; the light source component is connected with the input ends of the one-to-two optical fibers, the two output ends of the one-to-two optical fibers are respectively connected with the first input collimator and the second input collimator, the output ends of the two-to-one optical fibers are respectively connected with the first output collimator and the second output collimator, the reference acquisition module comprises a reference sample component and a switching component, the reference sample component comprises a fixing frame fixedly arranged in the shell, a cuvette and a reference plate fixedly arranged on the fixing frame, the switching component comprises a switching disc capable of rotating relative to the fixing frame, an acquisition hole and a standard plate which are arranged on the switching disc, the first input collimator and the second input collimator are fixedly arranged on one side of the switching disc, which is opposite to the fixing frame, the first output collimator and the second output collimator are fixedly arranged on one side of the fixing frame, which is opposite to the switching disc, and the first input collimator and the first cuvette are opposite to the first cuvette; the second input collimator and the second output collimator are arranged opposite to each other and are arranged opposite to the reference plate; the liquid path system comprises a hose bundle communicated with the cuvette, the liquid constant temperature system comprises a constant temperature box, the hose bundle is arranged in the constant temperature box in a penetrating mode, the liquid spectrum acquisition equipment at least has a first working state, a second working state and a third working state under the action of movement of the switching disc, and the standard sheet and the reference plate are in a right-facing position in the first working state; in a second working state, the collecting hole and the reference plate are positioned at opposite positions; in a third working state, the collecting hole and the cuvette are in a right-facing position.
2. The liquid spectrum acquisition device of claim 1 further having a fourth operating state in which either of the reference plate and cuvette and either of the standard tab and the acquisition well are in a fully staggered position.
3. The liquid spectrum acquisition device according to claim 1, wherein the reference plate and the cuvette are arranged in a circumferential direction with a rotation center of the switching plate, and the standard plate and the acquisition aperture are arranged in a circumferential direction with a rotation center of the switching plate.
4. The liquid spectrum acquisition device of claim 1, wherein the hose bundle is circuitously disposed within the incubator.
5. The liquid spectrum acquisition device of claim 1, wherein a gas-liquid separator is disposed between the hose bundle and the cuvette.
6. The liquid spectrum acquisition device of claim 1, wherein the liquid path system comprises a liquid inlet pipe and a liquid outlet pipe which are respectively communicated with an inlet end and an outlet end of the cuvette, the liquid inlet pipe is positioned below the cuvette, and the liquid outlet pipe is positioned above the cuvette.
7. The liquid spectrum acquisition device according to claim 1, wherein a center of rotation of the switching plate is used as a center of a circle, a first arc line is formed between the center of the acquisition hole and the center of the cuvette, a second arc line is formed between the center of the standard piece and the center of the acquisition hole, and the first arc line and the second arc line are overlapped.
8. The liquid spectrum acquisition device of claim 1, wherein the acquisition aperture has a larger aperture than the cuvette, the cuvette having a larger aperture than the standard cell and the reference plate.
9. The liquid spectrum acquisition device according to claim 1, wherein the output end of the two-in-one optical fiber is provided with an installation positioning structure, so that two centrally arranged fiber cores are aligned with the center of the slit of the spectrometer and are both positioned at the center of the slit.
10. The liquid spectrum acquisition device of claim 1, wherein two cores in the two-in-one optical fiber are arranged closely in the middle, and the sum of the diameters of the two cores is smaller than the spectrometer slit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311265819.6A CN117388207A (en) | 2023-09-28 | 2023-09-28 | Liquid spectrum acquisition equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311265819.6A CN117388207A (en) | 2023-09-28 | 2023-09-28 | Liquid spectrum acquisition equipment |
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| CN117388207A true CN117388207A (en) | 2024-01-12 |
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| CN202311265819.6A Pending CN117388207A (en) | 2023-09-28 | 2023-09-28 | Liquid spectrum acquisition equipment |
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| CN215767371U (en) * | 2022-01-06 | 2022-02-08 | 安徽中科谱康科技有限公司 | Spectral measurement system based on reference light path |
| CN218725612U (en) * | 2022-11-01 | 2023-03-24 | 大连大特气体有限公司 | Constant-temperature sample introduction analysis system |
| CN116773483A (en) * | 2023-06-30 | 2023-09-19 | 无锡迅杰光远科技有限公司 | Multichannel spectrum detection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207689363U (en) * | 2017-12-21 | 2018-08-03 | 中国石油天然气股份有限公司 | Near-infrared spectrum analysis simulator |
| CN210015033U (en) * | 2019-05-24 | 2020-02-04 | 唐山师范学院 | Thermostat of spectrophotometer |
| CN113049522A (en) * | 2019-12-26 | 2021-06-29 | 中国石油天然气股份有限公司 | Near-infrared analysis device capable of eliminating bubbles |
| CN213301472U (en) * | 2020-11-05 | 2021-05-28 | 无锡迅杰光远科技有限公司 | Automatic change spectrum collection system of demarcation |
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