A fiber optic splitter structure for ultraviolet detectors

Abstract

This utility model relates to the technical field of absorbance detection equipment. The technical problems it aims to solve are high cost and insufficient data accuracy. To address these issues, this utility model provides an ultraviolet detector with a fiber optic splitter structure. The utility model includes: a fiber optic splitter; a cold light source module including a cold light source connected to the main path; a sample detection channel module connected to a first branch; a reference detection channel module connected to a second branch; and a flow cell connected to the first branch. The light emitted from the cold light source is divided into two paths: one path directly connects to the reference detection channel module to detect reference data; the other path passes through the flow cell and then connects to the sample detection channel module to detect sample data. The reference data includes the current reference energy and the reference energy at zero; the sample data includes the current sample energy and the sample energy at zero. This utility model offers low cost and improved data accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of absorbance detection equipment, and in particular to an ultraviolet detector with an optical fiber splitting structure. Background Technology

[0002] As an important branch of analytical instruments, detectors are widely used in fields such as biochemistry, food analysis, pharmaceutical research, and environmental analysis.

[0003] In common detectors with reference optical paths, the light source is split into two beams using a beam splitter (one for reference detection and the other for transmission detection), resulting in a complex optical path structure. This not only limits the beam size due to the existing optical components but also leads to a greater number of mechanical parts for mounting and fixing, resulting in high production and maintenance costs. Furthermore, traditional light sources are prone to heat generation, causing wavelength drift and affecting detection results, leading to insufficient data accuracy. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the above-mentioned problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides an ultraviolet detector with an optical fiber splitting structure, comprising: The fiber optic splitter includes a main path, a first branch path, and a second branch path; the first branch path and the second branch path are connected in parallel at one end of the main path. Cold light source module, including a cold light source connected to the main circuit; The reference detection channel module is connected to the second branch. Sample testing channel module; The flow cell is connected to the first branch at one end and to the sample detection channel module at the other end via an optical fiber. The cold light source emits light in two paths: one path connects to the reference detection channel module to detect reference data; the other path, after being absorbed by the liquid in the flow cell, connects to the sample detection channel module to detect sample data. The reference data includes the current reference energy. and the reference energy at zero Sample data includes the current sample energy. Sample energy at zero .

[0006] In one embodiment of the present invention, the cold light source module further includes at least one filter; the filter is disposed on the light-emitting side of the cold light source.

[0007] In one embodiment of this utility model, the filter is detachably connected to the cold light source module.

[0008] In one embodiment of this utility model, based on the current reference energy Reference energy at zero Current sample energy and the sample energy at zero Calculate the absorbance.

[0009] In one embodiment of this utility model, absorbance The calculation formula is: -------Formula 1 in, Light transmittance.

[0010] In one embodiment of this utility model, the light transmittance The calculation formula is: ------Formula 2 in, This represents the current sample energy. The sample energy at zero; The current reference energy; This is the reference energy when the value is reset to zero.

[0011] In one embodiment of this utility model, the cold light source includes an LED light source.

[0012] In one embodiment of this utility model, the cold light source is a multi-wavelength module.

[0013] In one embodiment of this utility model, the wavelength range of the cold light source is 190nm~900nm.

[0014] In one embodiment of this utility model, the fiber optic splitter includes at least two splitting modules.

[0015] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: The fiber optic splitter structure ultraviolet detector described in this invention has a simple structure, which simplifies the optical path complexity, reduces production and maintenance costs, and improves data accuracy. Attached Figure Description

[0016] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of an ultraviolet detector with an optical fiber splitting structure according to a preferred embodiment of the present invention; Figure 2 yes Figure 1The diagram shows the internal structure of the ultraviolet detector with a fiber optic splitter. Figure 1 ; Figure 3 yes Figure 1 The diagram shows the internal structure of the ultraviolet detector with a fiber optic splitter. Figure 2 ; Figure 4 yes Figure 1 The flow path diagram of the fiber optic splitter structure ultraviolet detector is shown. Explanation of reference numerals in the accompanying drawings: 100, fiber optic splitter; 110, main path; 120, first branch path; 130, second branch path; 200. Cold light source module; 210. Cold light source; 220. Filter; 300. Sample testing channel module; 400. Reference detection channel module; 500, Flow-through pool; 600. Fiber optic cable. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0018] Reference Figures 1-4 As shown, this embodiment of the present invention provides an ultraviolet detector with an optical fiber splitting structure, comprising: The fiber optic splitter 100 includes a main path 110, a first branch path 120, and a second branch path 130; the first branch path 120 and the second branch path 130 are connected in parallel at one end of the main path 110. The cold light source module 200 includes a cold light source 210 connected to the main circuit 110; The reference detection channel module 400 is connected to the second branch 130; Sample detection channel module 300; The flow cell 500 is connected at one end to the first branch 120 and at the other end to the sample detection channel module 300 via optical fiber 600. The cold light source 210 emits light in two paths: one path connects to the reference detection channel module 400 to detect reference data; the other path, after being absorbed by the liquid in the flow cell 500, connects to the sample detection channel module 300 to detect sample data. The reference data includes the current reference energy. (Light intensity of reference detection channel module 400) and reference energy at zeroing time (Background light intensity of reference detection channel module 400); Sample data includes current sample energy. (i.e., the light intensity of the sample detection channel module 300 after the cold light source 210 is absorbed by the sample when the sample is present in the liquid of the flow cell 500; when the filter 220 is provided, it is the light intensity after passing through the filter 220) and the sample energy at zeroing time. (Background light intensity of sample detection channel module 300 when there is no sample in the liquid of flow cell 500).

[0019] This application streamlines the design of the cold light source module 200, the sample detection channel module 300, and the reference detection channel module 400, and then connects these three modules through the fiber optic splitter module 100. This simplifies the structure and reduces optical path complexity, thereby lowering production and maintenance costs. This application utilizes a more stable cold light source 210 and is capable of detecting the current reference energy. Reference energy at zero Current sample energy Sample energy at zero Through reference data (current reference energy) Reference energy at zero The real-time introduction of [the technology / method] eliminates or reduces baseline drift caused by system fluctuations, and corrects data accuracy in real time. Therefore, this application can improve data accuracy.

[0020] In some comparative embodiments, the optical path is exposed to the environment, resulting in poor anti-interference capability and susceptibility to electromagnetic interference or stray light. However, this application uses an optical fiber splitter 100 to connect the cold light source module 200, the sample detection channel module 300, and the reference detection channel module 400, thereby sealing the optical path and reducing interference.

[0021] Furthermore, the cold light source module 200 also includes at least one filter 220; the filter 220 is disposed on the light-emitting side of the cold light source 210.

[0022] Specifically, the filter 220 provided in this embodiment allows light within a predefined wavelength range to pass through the beam emitted from the cold light source 210, while preventing light of other wavelengths from passing through.

[0023] Furthermore, the filter 220 is detachably connected to the cold light source module 200.

[0024] Specifically, this embodiment facilitates the quick installation and removal of the filter 220, so that in actual use, the filter 220 can be added or the number of filters 220 can be adjusted according to the actual situation.

[0025] Furthermore, based on the current reference energy Reference energy at zero Current sample energy and the sample energy at zero Calculate the absorbance.

[0026] absorbance The calculation formula is: ----Formula 1 in, Light transmittance.

[0027] Light transmittance The calculation formula is: ------Formula 2 in, Light transmittance; The current sample energy (i.e., the light intensity of the sample detection channel module 300 after absorption by the cold light source 210 when the sample is present in the liquid of the flow cell 500; when the filter 220 is provided, it is the light intensity after passing through the filter 220). The sample energy at zero (background light intensity of the sample detection channel module 300 when there is no sample in the liquid of the flow cell); This is the current reference energy (light intensity of reference detection channel module 400); The reference energy at the time of zeroing (background light intensity of the reference detection channel module 400).

[0028] In some comparative embodiments, transmittance was calculated using Formula 3. :

[0029] In formula 3, Light transmittance; The light intensity of the sample detection channel module 300 (after passing through the flow cell 500); The light intensity of the reference detection channel module 400 (from the fiber optic splitter 100); The background value is the dark current value; the spectrophotometer ratio is 90%. Because the spectrophotometer ratio of the sample channel is 90%, this application corrects the spectrophotometer ratio to 1 / 0.9 to compensate for differences in light intensity. This calculation method results in insufficient detection sensitivity, requiring a more sensitive photoelectric sensor or a better signal processing algorithm, thus leading to higher costs.

[0030] This embodiment uses an optical fiber splitter 100 and couples a sample detection channel module 300 and a reference detection channel module 400 into a dual detection module. Absorbance is calculated using formulas 2 and 1. Dynamic reference correction is performed through real-time readback of the reference data, achieving baseline drift reduction and background clearing. Therefore, this embodiment has real-time readback and detection capabilities, and also features online baseline drift reduction and background clearing. This application eliminates the need for splitting ratio compensation light intensity and achieves cleaner background removal; it also improves light source stability and detection sensitivity, eliminating the need for higher-sensitivity photoelectric sensors or better signal processing algorithms, thus reducing costs.

[0031] Furthermore, the cold light source 210 includes an LED light source.

[0032] Specifically, LED light sources have low heat generation, long lifespan, and good stability.

[0033] Furthermore, the cold light source 210 is a multi-wavelength module. The multi-wavelength module employs multiple modules, each of which is switchable. In some other embodiments, the cold light source 210 may also be a single-wavelength module.

[0034] Furthermore, the light source wavelength range of the cold light source 210 is 190nm to 900nm. In some embodiments, the light source range of the cold light source 210 is 280nm.

[0035] Furthermore, the fiber optic splitter 100 includes at least two splitting modules.

[0036] This application employs single-wavelength or dual-wavelength detection technology, combined with a cold light source 210 and an optical fiber splitter 100, to achieve baseline drift subtraction by real-time reading and detection of reference data (voltage) and sample data (voltage). This application offers significant advantages in structural design, performance optimization, and application scenarios, making it suitable for high-precision and high-stability detection requirements.

[0037] The components of this application are made of common materials, have simple manufacturing processes, require no special surface finishing, and have low manufacturing costs. This application also features a simple structure, easy assembly and disassembly, and reasonable cost.

[0038] The working process of this application is as follows: automatic zeroing (can be performed manually), set the wavelength and turn on the cold light source 210, the UV value fluctuates, the sample detection channel module 300 passes through the flow cell 500 with pure water, run for 5 minutes, the baseline is still fluctuating, manually zero, the interface wavelength changes, infinitely approaching 0, wait for a moment, the baseline stabilizes.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An ultraviolet detector of fiber optic spectrometer design, characterized by: include: The fiber optic splitter includes a main path, a first branch path, and a second branch path; the first branch path and the second branch path are connected in parallel at one end of the main path. A cold light source module, including a cold light source connected to the main path; The reference detection channel module is connected to the second branch. Sample testing channel module; The flow cell has one end connected to the first branch and the other end connected to the sample detection channel module; The light emitted by the cold light source is divided into two paths, one of which is connected to the reference detection channel module to detect reference data; Another liquid after light absorption of flow-through cell is connected to sample detection channel module to detect sample data; the reference data includes current reference energy and reference energy at zero clearing ; the sample data includes current sample energy and sample energy at zero clearing .

2. The fibered spectrometered UV detector according to claim 1, characterized in that: The cold light source module further includes at least one filter; the filter is disposed on the light-emitting side of the cold light source.

3. The ultraviolet detector with fiber optic splitting structure according to claim 2, characterized in that: The filter is detachably connected to the cold light source module.

4. The ultraviolet detector with fiber optic splitting structure according to claim 1, characterized in that: from the current reference energy the reference energy at the zeroing the current sample energy and the sample energy at the zeroing the absorbance is calculated.

5. The fiber-optic spectrometer-based ultraviolet detector of claim 4, wherein: Absorbance The formula for calculating the absorbance is: ; wherein, is the light transmittance.

6. The fiber-optic spectrometer-based ultraviolet detector of claim 5, wherein: transmittance The calculation formula is: ;in, Light transmittance; This represents the current sample energy. The sample energy at zero; The current reference energy; This is the reference energy when the value is reset to zero.

7. The fiber-optic spectrometer-based ultraviolet detector of claim 1, wherein: The cold light source includes an LED light source.

8. The fiber-optic spectrometer-based ultraviolet detector of claim 1, wherein: The cold light source is a multi-wavelength module.

9. The fiber-optic spectrometer-based ultraviolet detector of claim 1, wherein: The wavelength range of the cold light source is 190nm~900nm.

10. The fiber-optic spectrometer-based ultraviolet detector of claim 1, wherein: The fiber optic splitter includes at least two splitting modules.

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