CN117538292B - Liquid analysis system - Google Patents
Liquid analysis system Download PDFInfo
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- CN117538292B CN117538292B CN202311495771.8A CN202311495771A CN117538292B CN 117538292 B CN117538292 B CN 117538292B CN 202311495771 A CN202311495771 A CN 202311495771A CN 117538292 B CN117538292 B CN 117538292B
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- 239000007788 liquid Substances 0.000 title claims abstract description 68
- 238000001228 spectrum Methods 0.000 claims abstract description 34
- 230000002572 peristaltic effect Effects 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 8
- 239000013307 optical fiber Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 101100162020 Mesorhizobium japonicum (strain LMG 29417 / CECT 9101 / MAFF 303099) adc3 gene Proteins 0.000 description 4
- 101100434411 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ADH1 gene Proteins 0.000 description 4
- 101150102866 adc1 gene Proteins 0.000 description 4
- 101150042711 adc2 gene Proteins 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 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
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/45—Interferometric spectrometry
-
- 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
- G01N21/17—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
-
- 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)
- General 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)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The application discloses a liquid analysis system, which relates to the technical field of instruments and meters, and comprises: the device comprises a collimator, an interferometer, a first beam splitter, a cuvette and a spectrum acquisition module; a light source enters the interferometer after passing through the collimator; the interferometer splits the received light source and propagates the light source to the first beam splitter; the first beam splitter splits the received light source to obtain interference light of a reference light path and interference light of a sample light path, and the interference light of the sample light path enters the cuvette; the cuvette is used for carrying out colorimetric on the liquid to be detected; the spectrum acquisition module is used for simultaneously acquiring the spectrums of the laser signal of the interferometer, the interference signal of the reference light path and the interference signal of the sample light path, and carrying out liquid analysis according to the acquisition result. The problem of probably have the light source fluctuation or motor vibrations and then the measurement accuracy that leads to among the prior art poor is solved.
Description
Technical Field
The invention relates to a liquid analysis system, and belongs to the technical field of instruments and meters.
Background
The principle of the liquid detector is based on optical, electrochemical, chromatographic and other principles, and the components in the liquid are determined by analyzing the characteristics of the components in the liquid. The existing liquid analyzer mainly comprises a single-light path liquid analyzer and a double-light path liquid analyzer.
Referring to fig. 1, a schematic diagram of one possible dual-path liquid analyzer is shown. As shown in fig. 1, a Y-shaped dual-core optical fiber is used to connect the light source, one end is connected with the light source, the other two ends are connected with the chopper, one port of the chopper is connected with the cuvette support, the other port is connected with the spectrometer through the other Y-shaped optical fiber, and the other end of the flow cell is connected with the spectrometer through the Y-shaped optical fiber.
The liquid analyzer uses the chopper to perform switching collection of the reference spectrum and the sample spectrum, so that the collection time is reduced, the influence of light source fluctuation is reduced to a certain extent, and the reference spectrum and the sample spectrum are collected in a time-sharing manner, so that the influence of light source fluctuation is still caused; and secondly, the chopper is driven by a motor to generate vibration, the optical path of the chopper is coupled through optical fibers, and the vibration can generate fiber shake to further cause the change of light intensity so as to reduce the accuracy of a prediction result.
Disclosure of Invention
The invention aims to provide a liquid analysis system which is used for solving the problems existing in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
According to a first aspect, embodiments of the present invention provide a liquid analysis system comprising:
The device comprises a collimator, an interferometer, a first beam splitter, a cuvette and a spectrum acquisition module;
a light source enters the interferometer after passing through the collimator;
The interferometer splits the received light source and propagates the light source to the first beam splitter;
The first beam splitter splits the received light source to obtain interference light of a reference light path and interference light of a sample light path, and the interference light of the sample light path enters the cuvette; the cuvette is used for carrying out colorimetric on the liquid to be detected;
the spectrum acquisition module is used for simultaneously acquiring the spectrums of the laser signal of the interferometer, the interference signal of the reference light path and the interference signal of the sample light path, and carrying out liquid analysis according to the acquisition result.
Optionally, the liquid analysis system further comprises a first reflection system;
The first reflection system is used for reflecting the light source after the interferometer splits light and reflecting the light source to the first beam splitter.
Optionally, the first reflecting system comprises a first mirror and a second mirror;
the first reflecting mirror is used for reflecting the light source after the light is split by the interferometer and reflecting the light source to the second reflecting mirror;
The second reflecting mirror is used for reflecting the received light source to the first beam splitter, and a connecting line formed by the first reflecting mirror and the interferometer is parallel to a connecting line formed by the second reflecting mirror and the first beam splitter.
Optionally, the liquid analysis system further comprises a third mirror;
The third reflecting mirror is parallel to the first beam splitter, the third reflecting mirror reflects the light reflected by the first beam splitter to the cuvette again, and the transmitted light of the first beam splitter enters the reference light path.
Optionally, the liquid analysis system further comprises a peristaltic pump for pumping the liquid to be measured into the cuvette.
Optionally, the liquid analysis system further comprises a waste liquid reservoir for receiving liquid discharged from the cuvette.
Optionally, the spectrum acquisition module comprises a first acquisition unit, a second acquisition unit, a third acquisition unit and a fourth acquisition unit;
The first acquisition unit and the second acquisition unit are used for acquiring the spectrum of the laser signal of the interferometer;
the third acquisition unit is used for acquiring the spectrum of the interference signal of the reference light path;
The fourth acquisition unit is used for acquiring the spectrum of the interference signal of the sample light path.
Optionally, the liquid analysis system further comprises an analog switch and a gain adjustment unit, which are located before the third and/or fourth acquisition unit;
The analog switch is used for selecting the gain adjusting unit when the signal intensity of the interference signal is lower than the preset intensity, and outputting the interference signal to the third acquisition unit and/or the fourth acquisition unit after the interference signal is adjusted by the gain adjusting unit.
Optionally, the gain adjustment unit includes at least two;
The analog switch is used for selecting a target gain adjustment unit from the at least two gain adjustment units according to the signal intensity of the interference signal, and outputting the interference signal to the third acquisition unit and/or the fourth acquisition unit after being adjusted by the target gain adjustment unit.
Optionally, when the cuvette is heated to a preset temperature, the first acquisition unit, the second acquisition unit, the third acquisition unit and the fourth acquisition unit are triggered to perform synchronous acquisition.
By providing a liquid analysis system, the liquid analysis system comprises: the device comprises a collimator, an interferometer, a first beam splitter, a cuvette and a spectrum acquisition module; a light source enters the interferometer after passing through the collimator; the interferometer splits the received light source and propagates the light source to the first beam splitter; the first beam splitter splits the received light source to obtain interference light of a reference light path and interference light of a sample light path, and the interference light of the sample light path enters the cuvette; the cuvette is used for carrying out colorimetric on the liquid to be detected; the spectrum acquisition module is used for simultaneously acquiring the spectrums of the laser signal of the interferometer, the interference signal of the reference light path and the interference signal of the sample light path, and carrying out liquid analysis according to the acquisition result. The problem that in the prior art, the measurement accuracy is poor due to the fact that a light source fluctuates or a motor vibrates is solved; the method can be used for simultaneously measuring the reference light path and the sample light path to eliminate the influence of light source fluctuation on a measurement result, and eliminating the influence of vibration by using no optical fiber through spatial light path coupling, so that the effect of improving measurement precision and accuracy is achieved.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a prior art liquid analyzer;
FIG. 2 is a schematic diagram of one possible configuration of a liquid analysis system according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of one possible dynamic gain of an interference signal according to one embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Referring to fig. 1, a schematic structural diagram of a liquid analysis system according to an embodiment of the present application is shown, where the liquid analysis system includes: the device comprises a collimator 1, an interferometer 2, a first beam splitter 3, a cuvette 4 and a spectrum acquisition module 5;
the light source enters the interferometer 2 after passing through the collimator 1;
The interferometer 2 splits the received light source, propagating the light source to the first beam splitter 3;
the first beam splitter 3 splits the received light source to obtain interference light of a reference light path and interference light of a sample light path, and the interference light of the sample light path enters the cuvette 4; the cuvette 4 is used for carrying out colorimetric on the liquid to be detected;
The spectrum acquisition module 5 is configured to simultaneously acquire the spectrums of the laser signal of the interferometer 2, the interference signal of the reference optical path, and the interference signal of the sample optical path, and perform liquid analysis according to the acquisition result.
Wherein the first beam splitter 3 is semi-transparent, i.e. after the light source has passed the first beam splitter 3, half of the light is reflected and the other half is transmitted, in this embodiment the transmitted light enters the reference light path and the reflected light enters the sample light path.
The liquid analysis system further comprises a first reflection system 6;
the first reflection system 6 is configured to reflect the light source after the light is split by the interferometer 2, and reflect the light source to the first beam splitter 3.
Wherein, in connection with fig. 1, the first reflecting system 6 comprises a first reflecting mirror 61 and a second reflecting mirror 62;
The first reflecting mirror 61 is configured to reflect the light source after the light is split by the interferometer 2, and reflect the light source to the second reflecting mirror 62;
the second reflecting mirror 62 is configured to reflect the received light source to the first beam splitter 3, and a line formed by the first reflecting mirror 61 and the interferometer 2 is parallel to a line formed by the second reflecting mirror 62 and the first beam splitter 3.
The present application redirects light propagating from interferometer 2 by first mirror 61 and second mirror 62, thereby reducing the volume of the liquid analysis system.
The liquid analysis system further comprises a third mirror 7;
the third reflecting mirror 7 is parallel to the first beam splitter 3, the third reflecting mirror 7 reflects the light reflected by the first beam splitter 3 to the cuvette 4 again, and the transmitted light of the first beam splitter 3 enters the reference light path.
The cuvette 4 and the third mirror 7 are arranged in parallel. Alternatively, the cuvette 4 is placed in a cuvette 4 holder, and the cuvette 4 holder is arranged parallel to the third mirror 7.
The liquid analysis system further comprises a peristaltic pump 8, wherein the peristaltic pump 8 is used for pumping the liquid to be tested into the cuvette 4. In actual implementation, the cuvette 4 is provided with a sample inlet and a sample outlet, and the peristaltic pump 8 pumps the liquid to be measured into the cuvette 4 through the sample inlet.
Optionally, the liquid analysis system further comprises a waste liquid reservoir 9 for receiving liquid discharged from the cuvette 4. I.e. the liquid to be measured in the cuvette 4 can be discharged through the sample outlet to the waste liquid reservoir 9 after measurement.
In a possible embodiment, the spectrum acquisition module 5 comprises a first acquisition unit, a second acquisition unit, a third acquisition unit and a fourth acquisition unit;
The first acquisition unit and the second acquisition unit are used for acquiring the spectrum of the laser signal of the interferometer 2;
the third acquisition unit is used for acquiring the spectrum of the interference signal of the reference light path;
The fourth acquisition unit is used for acquiring the spectrum of the interference signal of the sample light path.
Optionally, each acquisition unit may be an ADC, that is, the first acquisition unit is an ADC1, the second acquisition unit is an ADC2, the third acquisition unit is an ADC3, and the fourth acquisition unit is an ADC4.
In connection with fig. 2, a lens may be further included before the third and fourth collecting units, and the interference light propagates to the corresponding collecting units through the lens, which is not limited in this embodiment.
The liquid analysis system further comprises an analog switch and a gain adjustment unit, wherein the analog switch and the gain adjustment unit are positioned before the third acquisition unit and/or the fourth acquisition unit;
The analog switch is used for selecting the gain adjusting unit when the signal intensity of the interference signal is lower than the preset intensity, and outputting the interference signal to the third acquisition unit and/or the fourth acquisition unit after the interference signal is adjusted by the gain adjusting unit.
Referring to fig. 3, because the interference signal has a wider dynamic range, the energy value at the position near the zero optical path difference (ZPD) is far greater than that at other positions, and if the whole interference pattern is subjected to gain, energy saturation is caused, so that the problem of low resolution and large noise caused by a larger range of the interference signal is avoided by performing gain adjustment when the signal intensity of the interference signal is lower than the preset intensity.
Optionally, the analog switch further comprises a detector before, and the detector is used for detecting the signal intensity of the interference light, so that the analog switch is triggered to select according to the detected signal intensity.
In one possible embodiment, the gain adjustment unit comprises at least two;
The analog switch is used for selecting a target gain adjustment unit from the at least two gain adjustment units according to the signal intensity of the interference signal, and outputting the interference signal to the third acquisition unit and/or the fourth acquisition unit after being adjusted by the target gain adjustment unit.
For example, the at least two gain adjustment units include a 10-time gain adjustment unit and a 1-time gain adjustment unit, and when the signal strength is lower than the preset strength, the 10-time gain adjustment unit is selected for gain adjustment, and when the signal strength is higher than the strength threshold, the 1-time gain adjustment unit is selected for gain adjustment.
According to the method, the weak signal is subjected to 10 times gain and 1 time gain, so that the 24-bit ADC can have higher resolution to reduce noise when the weak signal is acquired, and the effect of improving the signal to noise ratio is achieved.
In this embodiment, only the two gain adjustment units are used for performing gain adjustment to exemplify the method, and optionally, more gain adjustment units may be further provided to subdivide the signal strength, so as to better improve the signal-to-noise ratio.
In a possible embodiment, the cuvette 4 triggers the first, second, third and fourth acquisition units to perform a simultaneous acquisition when heated to a preset temperature. Optionally, the liquid analysis system further includes an FPGA unit, and in combination with fig. 2, the FPGA unit is connected to the ADC1, the ADC2, the ADC3, and the ADC4 respectively, and when detecting that the temperature reaches the preset temperature, the FPGA triggers the ADC1, the ADC2, the ADC3, and the ADC4 to collect simultaneously.
As described above, the cuvette 4 is disposed on the cuvette 4 holder, and the cuvette 4 holder may be a TEC thermostatic cuvette 4 holder, so that ADC1, ADC2, ADC3, ADC4 may be triggered to collect simultaneously when the cuvette 4 holder is heated to a preset temperature, such as 25 ℃.
By simultaneously collecting interference signals of the reference light path and the sample light path, the application reduces the system errors caused by detector response, environment transformation and dark noise change, and improves the accuracy and precision of liquid analysis.
In conjunction with fig. 2, in this embodiment, the interferometer 2 may include a fourth reflector, a fifth reflector, a second beam splitter, a first angle mirror, a second angle mirror, a voice coil motor, and a laser, where the first angle mirror is disposed opposite the fourth reflector, the second angle mirror is disposed opposite the fifth reflector, and the first angle mirror and the second angle mirror are both connected to the voice coil motor. In the above configuration, after the light source reaches the interferometer 2 through the collimator 1, the light is split by the second beam splitter, the reflected light of the second beam splitter is reflected to the first corner mirror by the fourth reflector, the transmitted light of the second beam splitter propagates to the fifth mirror, and the fifth mirror is reflected to the second corner mirror. In addition, after the laser emits the laser light, the laser light is split by the second beam splitter, and the laser light reaches the first acquisition unit and the second acquisition unit through reflection and transmission of each device, and the specific configuration of the interferometer 2 is not limited in the present application.
In summary, by providing a liquid analysis system comprising: the device comprises a collimator, an interferometer, a first beam splitter, a cuvette and a spectrum acquisition module; a light source enters the interferometer after passing through the collimator; the interferometer splits the received light source and propagates the light source to the first beam splitter; the first beam splitter splits the received light source to obtain interference light of a reference light path and interference light of a sample light path, and the interference light of the sample light path enters the cuvette; the cuvette is used for carrying out colorimetric on the liquid to be detected; the spectrum acquisition module is used for simultaneously acquiring the spectrums of the laser signal of the interferometer, the interference signal of the reference light path and the interference signal of the sample light path, and carrying out liquid analysis according to the acquisition result. The problem that in the prior art, the measurement accuracy is poor due to the fact that a light source fluctuates or a motor vibrates is solved; the method can be used for simultaneously measuring the reference light path and the sample light path to eliminate the influence of light source fluctuation on a measurement result, and eliminating the influence of vibration by using no optical fiber through spatial light path coupling, so that the effect of improving measurement precision and accuracy is achieved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A liquid analysis system, the liquid analysis system comprising:
The device comprises a collimator, an interferometer, a first beam splitter, a cuvette and a spectrum acquisition module;
a light source enters the interferometer after passing through the collimator;
The interferometer splits the received light source and propagates the light source to the first beam splitter;
The first beam splitter splits the received light source to obtain interference light of a reference light path and interference light of a sample light path, and the interference light of the sample light path enters the cuvette; the cuvette is used for carrying out colorimetric on the liquid to be detected;
the interferometer comprises a laser for emitting a laser signal;
The spectrum acquisition module is used for simultaneously acquiring the spectrums of the laser signal sent by the laser of the interferometer, the interference signal of the reference light path and the interference signal of the sample light path, and carrying out liquid analysis according to the acquisition result.
2. The liquid analysis system of claim 1, further comprising a first reflective system;
The first reflection system is used for reflecting the light source after the interferometer splits light and reflecting the light source to the first beam splitter.
3. The liquid analysis system of claim 2, wherein the first reflective system comprises a first mirror and a second mirror;
the first reflecting mirror is used for reflecting the light source after the light is split by the interferometer and reflecting the light source to the second reflecting mirror;
The second reflecting mirror is used for reflecting the received light source to the first beam splitter, and a connecting line formed by the first reflecting mirror and the interferometer is parallel to a connecting line formed by the second reflecting mirror and the first beam splitter.
4. The liquid analysis system of claim 1, further comprising a third mirror;
The third reflecting mirror is parallel to the first beam splitter, the third reflecting mirror reflects the light reflected by the first beam splitter to the cuvette again, and the transmitted light of the first beam splitter enters the reference light path.
5. The liquid analysis system of claim 1, further comprising a peristaltic pump for pumping the liquid to be tested into the cuvette.
6. The liquid analysis system of claim 1, further comprising a waste reservoir for receiving liquid discharged from the cuvette.
7. The liquid analysis system of any one of claims 1 to 6, wherein the spectrum acquisition module comprises a first acquisition unit, a second acquisition unit, a third acquisition unit, and a fourth acquisition unit;
The first acquisition unit and the second acquisition unit are respectively used for acquiring spectra which are emitted by the lasers of the interferometer and correspond to two different laser signals formed after beam splitting;
the third acquisition unit is used for acquiring the spectrum of the interference signal of the reference light path;
The fourth acquisition unit is used for acquiring the spectrum of the interference signal of the sample light path.
8. The liquid analysis system of claim 7, further comprising an analog switch and a gain adjustment unit located before the third and/or fourth acquisition units;
The analog switch is used for selecting the gain adjusting unit when the signal intensity of the interference signal is lower than the preset intensity, and outputting the interference signal to the third acquisition unit and/or the fourth acquisition unit after the interference signal is adjusted by the gain adjusting unit.
9. The liquid analysis system of claim 8, wherein the gain adjustment unit comprises at least two;
The analog switch is used for selecting a target gain adjustment unit from the at least two gain adjustment units according to the signal intensity of the interference signal, and outputting the interference signal to the third acquisition unit and/or the fourth acquisition unit after being adjusted by the target gain adjustment unit.
10. The liquid analysis system of claim 7, wherein the cuvette, when heated to a preset temperature, triggers the first, second, third, and fourth collection units to perform simultaneous collection.
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| CN202311495771.8A CN117538292B (en) | 2023-11-10 | 2023-11-10 | Liquid analysis system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645030A (en) * | 2016-12-26 | 2017-05-10 | 哈尔滨工程大学 | Integrated multiband mach-zehnder interferometer and application method |
| CN111337454A (en) * | 2020-04-17 | 2020-06-26 | 湖南文理学院 | Method for rapidly detecting solution concentration based on laser interference technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1483286A1 (en) * | 1984-10-08 | 1989-05-30 | Всесоюзный Научно-Исследовательский Центр По Изучению Свойств Поверхности Вакуума | Interference spectral instrument |
| US6847456B2 (en) * | 2000-04-28 | 2005-01-25 | Massachusetts Institute Of Technology | Methods and systems using field-based light scattering spectroscopy |
| CN116223450B (en) * | 2023-03-23 | 2024-03-19 | 中南大学 | Instrument and method for measuring concentration of transparent liquid |
| CN116539530A (en) * | 2023-05-11 | 2023-08-04 | 哈尔滨工程大学 | Transparent solution concentration measuring device and method based on optical fiber interference |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645030A (en) * | 2016-12-26 | 2017-05-10 | 哈尔滨工程大学 | Integrated multiband mach-zehnder interferometer and application method |
| CN111337454A (en) * | 2020-04-17 | 2020-06-26 | 湖南文理学院 | Method for rapidly detecting solution concentration based on laser interference technology |
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