CN219348629U - Vertical upward open type absorption spectrum acquisition device - Google Patents

Abstract

The application relates to a vertical ascending open absorption spectrum collection system includes transparent body, light source and spectrum collection light sensor, the top surface of transparent body is equipped with open sample cell, the side of transparent body is equipped with into plain noodles and play plain noodles, the light source setting is in the plain noodles department of going into for with test light to the liquid that awaits measuring in the sample cell, spectrum collection light sensor sets up in play plain noodles department for gather the absorption spectrum of liquid that awaits measuring. The application adopts the overhead open sample cell, the pouring and the taking out of the liquid are very convenient, the cleaning is also very convenient, the cleaning dead angle which is not easy to contact does not exist, the residual potential influence of the dead angle is avoided, so the repeated use can not cause the pollution of the sample to be measured, and the technical problem that the sample is not easy to clean in the prior art is well solved. The thickness of the liquid to be measured is limited by selecting the proper depth of the sample cell, so that the limitation of the existing absorption spectrum acquisition device on the optical path is well solved.

Description

Vertical upward open type absorption spectrum acquisition device

Technical Field

The application relates to the technical field of absorption spectrum acquisition, in particular to a vertical upward open type absorption spectrum acquisition device.

Background

The absorption spectrum is also called an absorption curve, which refers to a spectrum generated by the transition of a substance from a low energy level to a high energy level when photons are absorbed by the substance, and light with different wavelengths acts on a sample and has different absorption intensities, so that each substance has a characteristic absorption spectrum, and therefore, the substance can be quantitatively and qualitatively analyzed. The absorption spectrum measurement technology has the characteristics of high sensitivity, strong anti-interference capability, simple and convenient operation, high working efficiency and the like, has important roles in analysis of environmental water samples, foods and the like, and has wide application in detection of inorganic ions, metal ions, chemical oxygen demand and the like.

According to the beer-lambert law, a beam of monochromatic light irradiates the surface of an absorption medium, and after passing through a medium with a certain thickness, the intensity of transmitted light is weakened as the medium absorbs a part of light energy, and the thicker the concentration of the absorption medium is, the thicker the thickness is, and the more remarkable the light intensity is weakened. Therefore, the design of an ideal absorption optical path according to the absorption coefficient of the absorption medium has important significance for quantitative detection. The common light path design mode of the current absorption spectrum technology is a detection light path structure based on a flow cell and a cuvette, and the corresponding technology can refer to a Chinese patent application with publication number of CN109307666A, named as a portable fluorescence spectrum detection system and a method for distinguishing regenerated water from drinking water by using the system, and a Chinese patent application with publication number of CN107144560A, named as an online chemical analyzer.

The light path design based on the flow cell and the cuvette is a semi-closed detection light path structure, can meet the requirement of absorption spectrum acquisition, but has some problems: 1. the problem that the light source and the light collecting area are difficult to clean is solved, in order to ensure the light inlet and outlet areas of the light source and the light collecting area at the head end and the tail end of the optical path, the flow cell and the cuvette need to have a certain thickness, the flow channels and the accommodating cavities in the flow cell and the cuvette can cause larger cleaning dead angles, and the liquid to be detected can be polluted by repeated use to influence the detection result; 2. the problem of manual operation is that certain manual operation is needed for sample injection, sample discharge and cleaning in the using process, and the manual operation limits the application of the absorption spectroscopy in the field of automatic detection; 3. the optical path is limited, whether the flow cell or the cuvette, because the structural characteristics determine that the two defects can be amplified when the long optical path acquisition is carried out, and the structural cost is obviously increased.

Disclosure of Invention

In order to solve the technical problems that the existing optical path design of the absorption spectroscopy adopts a semi-closed detection optical path structure, is difficult to clean and is difficult to operate manually and the optical path is limited, the application provides a vertical upward open type absorption spectrum acquisition device.

On the one hand, the vertical upward open type absorption spectrum acquisition device provided by the application adopts the following technical scheme: the utility model provides a vertical ascending open absorption spectrum collection system, includes transparent body, light source and spectrum collection light sensor, the top surface of transparent body is equipped with open sample cell, the side of transparent body is equipped with into plain noodles and play plain noodles, the light source sets up in the plain noodles department for with test light to the liquid that awaits measuring in the sample cell, spectrum collection light sensor sets up in play plain noodles department for gather the absorption spectrum of liquid that awaits measuring.

Through adopting above-mentioned technical scheme, this application absorption spectrum collection device's theory of operation is pouring into the open sample cell of overhead liquid that awaits measuring, the test light that the light source sent gets into the transparent body from the income plain noodles of transparent body, and a part light can be reflected at the bottom surface of liquid that awaits measuring, and a part light can be reflected at the top surface of liquid that awaits measuring, no matter what face is reflected, the absorption spectrum that reflects all can reflect the information of liquid that awaits measuring, then utilizes spectrum collection light sensor to gather the light that the reflection was returned at the play plain noodles of transparent body, realizes the collection of absorption spectrum.

The transparent body of this application has unique structure, adopt the open sample cell of overhead, pour into and take out liquid very convenient, wash also very convenient, can realize automatic operation even, extension absorption spectrum is in the application of automated inspection field, and there is not the washing dead angle of difficult contact moreover, wash at every turn can both sanitize, can avoid the remaining potential influence in dead angle through abluent mode before using, so repeatedly use can not cause the sample to be measured to receive the pollution, difficult abluent technical problem among the prior art has been solved betterly.

According to the method, the thickness of the liquid to be measured is limited by selecting the proper depth of the sample cell, the optical paths of the test light in the liquid are different due to the different thicknesses of the liquid to be measured, so that the requirement of the test on the optical paths is met, the taking and placing operation of the liquid can not be influenced even if the thickness of the liquid to be measured is large, the cleaning operation is also carried out, the cost is not obviously improved, and the limit of the existing absorption spectrum acquisition device on the optical paths is well solved.

Preferably, the light emitting surface and the light entering surface are both planes inclined to the horizontal plane.

By adopting the technical scheme, the light-emitting surface and the light-entering surface are planar, the light-entering and light-emitting efficiency can be better controlled, the path certainty of the light path is high, and the position arrangement of the light source and the spectrum collection light sensor is easier.

Preferably, the test light emitted by the light source is perpendicular to the light incident surface, the inclination angle of the light incident surface enables the incident angle of the test light on the upper surface of the liquid to be detected to be larger than the critical angle of total reflection, and a light blocking plate is further arranged in the transparent body and used for blocking the test light reflected from the lower surface of the liquid to be detected to the spectrum collection light sensor.

By adopting the technical scheme, when the test light is vertical to the light incident surface, the light incident efficiency is highest. The utility model discloses a utilize and produce total reflection in the upper surface department of liquid that awaits measuring, test light gets into liquid that awaits measuring, after certain optical path, can be reflected back at the upper surface high efficiency, returns to the transparent body smoothly, wears out the transparent body again, gets into spectrum collection light sensor, realizes the collection of absorption spectrum. Because a part of test light is inevitably reflected on the lower surface of the liquid to be tested, the light intensity of the part of test light possibly enters the spectrum acquisition optical sensor, and thus, the light intensity has two sources, the sources are complex, the proportion is not easy to determine, and the quantitative calculation is complex. When the product design, hope to get into spectrum and gather the light sensor and only have the light intensity source, make the light intensity calculation at the back simpler like this, test result also can be more accurate, the light barrier that this application set up just in time just shelters from the test light that liquid lower surface reflection to spectrum gathered the light sensor to await measuring, does not shelter from the test light that liquid upper surface reflection to spectrum gathered the light sensor to await measuring, guarantees that the light intensity that gets into spectrum and gathers the light sensor only has only the source.

Preferably, the test light emitted by the light source is perpendicular to the light incident surface, and the inclination angle of the light incident surface makes the incident angle of the test light on the lower surface of the liquid to be tested larger than the critical angle of total reflection.

By adopting the technical scheme, even if the test light does not enter the liquid to be tested, the absorption intensity can be influenced by the liquid to be tested, and the information of the liquid to be tested is reflected according to the absorption intensity.

Preferably, the transparent body is a frustum, and the light emergent surface and the light incident surface are cambered surfaces.

By adopting the technical scheme, the arc-shaped surface is similar to a convex lens, has a certain light condensing effect, and improves the light inlet and light outlet efficiency.

Preferably, the side wall of the sample cell is also provided with an overflow groove, and a soft rubber plug is arranged at the overflow groove.

By adopting the technical scheme, the soft rubber plug head is pulled out, and the liquid to be measured overflows from the overflow groove, so that the liquid to be measured is ensured to have a specific thickness. The same transparent body can be transformed into sample cells with different depths.

Preferably, the number of the overflow grooves on the side wall of the sample cell is multiple, and the heights of the overflow grooves are different.

Through adopting above-mentioned technical scheme, set up the overflow launder of difference in height at the lateral wall of sample cell, what kind of degree of depth is needed, just pulls out the soft plug head of corresponding position, and same transparent body can change out the sample cell of multiple different degree of depth, and accessory quantity subtracts greatly, does not need to change the transparent body moreover, pulls out corresponding soft plug head can, labour saving and time saving.

Preferably, the device further comprises a housing, the light source and the spectrum acquisition light sensor are both located in the housing, the light source is arranged on the housing through a first position adjustment assembly, and the spectrum acquisition light sensor is arranged on the housing through a second position adjustment assembly.

By adopting the technical scheme, in order to achieve better light-in and light-out effects, the light source and the spectrum acquisition light sensor can conveniently carry out position adjustment.

Preferably, the first and second position adjustment assemblies include at least an X-position adjustment assembly and a Z-position adjustment assembly.

By adopting the technical scheme, the incidence angle and the light emitting angle of the test light can be directly changed through position adjustment in the X direction and the Z direction, and the test result is directly influenced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the transparent body of this application has unique structure, adopts the open sample cell of overhead, and it is very convenient to pour into and take out liquid, washs also very conveniently, can realize automatic operation even, expands the application of absorption spectrum in the automated inspection field, does not have the washing dead angle of difficult contact moreover, avoids the remaining potential influence in dead angle, has solved difficult abluent technical problem among the prior art betterly.

2. The thickness of the liquid to be measured is limited by selecting the proper depth of the sample pool so as to meet the requirement of the test on the optical path, the taking and placing operation and the cleaning operation of the liquid are not affected even if the thickness of the liquid to be measured is large, the cost is not obviously increased, and the limit of the existing absorption spectrum acquisition device on the optical path is well solved.

Drawings

Fig. 1 is a front perspective view of an absorption spectrum collecting apparatus according to an embodiment of the present application;

FIG. 2 is a rear perspective view of an absorption spectrum collecting apparatus according to an embodiment of the present application;

FIG. 3 is a schematic diagram illustrating a half-section of an absorption spectrum collecting apparatus according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram illustrating a half-section of an absorption spectrum collecting apparatus according to a second embodiment of the present disclosure;

FIG. 5 is a front perspective view of an absorption spectrum collecting apparatus according to a third embodiment of the present application;

FIG. 6 is a rear perspective view of an absorption spectrum collecting apparatus according to a fourth embodiment of the present application;

fig. 7 is a schematic diagram illustrating a half-section of an absorption spectrum collecting apparatus according to a fourth embodiment of the present application;

FIG. 8 is a schematic diagram of an absorption spectrum collecting apparatus according to a fifth embodiment of the present application;

FIG. 9 is a front perspective view of an absorption spectrum collecting apparatus according to a sixth embodiment of the present application;

fig. 10 is a schematic diagram showing an exploded structure of an absorption spectrum collecting apparatus according to a sixth embodiment of the present application.

Reference numerals illustrate: 1. a transparent body; 11. a sample cell; 12. a light incident surface; 13. a light-emitting surface; 14. an overflow trough; 15. a soft rubber plug; 2. a light source; 3. a spectrum acquisition light sensor; 4. a housing; 5. a first position adjustment assembly; 51. an X-position adjustment assembly; 52. a Z-position adjustment assembly; 6. a second position adjustment assembly; 61. an X-position adjustment assembly; 62. a Z-position adjustment assembly; 7. a light barrier; 100. and (5) liquid to be measured.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-10.

Embodiment one:

referring to fig. 1 to 3, the embodiment of the application discloses an open absorption spectrum collection device with vertical upwards, including transparent body 1, light source 2 and spectrum collection light sensor 3, the top surface of transparent body 1 is equipped with open sample cell 11, the side of transparent body 1 is equipped with into plain noodles 12 and play plain noodles 13, light source 2 sets up in plain noodles 12 department for with test light to the liquid 100 that awaits measuring in sample cell 11, spectrum collection light sensor 3 sets up in plain noodles 13 department for gather the absorption spectrum of liquid 100 that awaits measuring. The transparent body 1 is generally made of a material such as glass having high light transmittance.

Referring to fig. 2, the light exit surface 13 and the light entrance surface 12 are both planes inclined from the horizontal plane. By adopting the planar light emitting surface 13 and the planar light entering surface 12, the light entering and light emitting efficiency can be better controlled, the path certainty of the light path is high, and the position arrangement of the light source 2 and the spectrum acquisition light sensor 3 is easier.

Referring to fig. 3, the test light emitted by the light source 2 is perpendicular to the light incident surface 12, the inclination angle of the light incident surface 12 makes the incident angle of the test light on the upper surface of the liquid 100 to be tested greater than the critical angle of total reflection, and a light blocking plate 7 is further disposed inside the transparent body 1 for blocking the test light reflected from the lower surface of the liquid 100 to be tested to the spectrum collection light sensor 3. When the test light is perpendicular to the light incident surface 12, the light reflected at the light incident surface 12 is the least, and the light incident efficiency is the highest. According to the light propagation characteristics, when light enters the optical-sparse medium from the optical dense medium, when the incident angle of the light is larger than the critical angle of total reflection, total reflection is generated at the interface, and in contrast, the transparent body 1 is compared with the liquid 100 to be measured, the transparent body 1 is the optical dense medium, and the liquid 100 to be measured is compared with air, and the liquid 100 to be measured is the optical dense medium. The application utilizes the total reflection generated at the upper surface of the liquid to be detected 100, the test light enters the liquid to be detected 100, and after a certain optical path, the test light can be efficiently reflected back at the upper surface, smoothly returns into the transparent body 1, passes out of the transparent body 1, enters the spectrum acquisition optical sensor 3, and realizes the acquisition of the absorption spectrum.

Since a part of the test light is inevitably reflected on the lower surface of the liquid 100 to be measured, the light intensity of the part may enter the spectrum collection photosensor 3, so that the light intensity has two sources, the sources are complex, the proportion is not easy to determine, and the quantitative calculation becomes complex. When the product is designed, only a unique light intensity source is expected to enter the spectrum acquisition light sensor 3, so that the calculation of the light intensity at the back is simpler, the test result is more accurate, the light barrier 7 just shields the test light reflected from the lower surface of the liquid to be tested 100 to the spectrum acquisition light sensor 3, and the light intensity entering the spectrum acquisition light sensor 3 is guaranteed to be only a unique source.

The method for collecting the vertical upward open type absorption spectrum collecting device comprises the following steps: the sample cell 11 is cleaned before use; then adding the liquid 100 to be measured into the sample cell 11 until the liquid 100 to be measured overflows; the light source 2 is utilized to emit test light to the light incident surface 12 of the transparent body 1, the test light enters the transparent body 1 and then enters the liquid 100 to be tested, and total reflection is generated at the upper surface of the liquid 100 to be tested; the spectrum acquisition light sensor 3 is used for acquiring the absorption spectrum of the liquid 100 to be detected on the light emergent surface 13 of the transparent body 1; after the collection, the liquid in the sample cell 11 is sucked away, and the inner wall of the sample cell 11 is cleaned in time if necessary. Since the liquids all have surface tension, the surfaces of the liquids all have a certain curvature, which also affects the reflection of the test light. The surfactant is added into the liquid 100 to be tested, so that the upper surface of the liquid 100 to be tested is more horizontal, and the influence on the test result is reduced.

The theory of operation of this application absorption spectrum collection system is pouring into the open sample cell 11 of overhead to liquid 100 that awaits measuring, the test light that light source 2 sent gets into transparent body 1 from the income plain noodles 12 of transparent body 1, a portion light can be at the bottom surface of liquid 100 that awaits measuring by reflection (because this application has set up the barn door 7, can shelter from this part light), a portion light is reflected at the top surface of liquid 100 that awaits measuring, no matter what face is reflected, the absorption spectrum of reflection all can reflect the information of liquid 100 that awaits measuring, then utilize spectral acquisition light sensor 3 to gather the light that the reflection was returned at the play plain noodles 13 of transparent body 1, realize the collection of absorption spectrum. When the test has a requirement on the optical path in the liquid to be tested 100, the test light must enter the liquid to be tested 100, so that the spectrum acquisition optical sensor 3 is arranged on the optical path reflected from the upper surface of the liquid to be tested 100, and when the positions of the light source 2 and the spectrum acquisition optical sensor 3 are fixed, the optical path of the test light in the liquid to be tested 100 can be adjusted by adjusting the depth of the sample cell 11.

The transparent body 1 of this application has unique structure, adopt the open sample cell 11 of overhead, it is very convenient to pour into and take out liquid, it is also very convenient to wash, can realize automatic operation even, the extension absorption spectrum is in the application of automated inspection field, there is not the washing dead angle of difficult contact moreover, wash at every turn can both sanitize, can avoid the remaining potential influence in dead angle through abluent mode before using, so repeatedly used can not cause the sample to be measured to receive the pollution, difficult abluent technical problem among the prior art has been solved betterly.

The thickness of the liquid 100 to be tested is limited by selecting the proper depth of the sample cell 11, the optical paths of the test light in the liquid are different due to the different thicknesses of the liquid 100 to be tested, so that the requirement of the test on the optical paths is met, the taking and placing operation of the liquid can not be influenced even if the thickness of the liquid 100 to be tested is large, the cleaning operation is also carried out, the cost is not remarkably improved, and the limit of the existing absorption spectrum acquisition device on the optical paths is well solved.

Embodiment two:

referring to fig. 4, a difference between the embodiments of the present application is that the test light emitted by the light source 2 is perpendicular to the light incident surface 12, and the inclination angle of the light incident surface 12 makes the incident angle of the test light on the lower surface of the liquid 100 to be tested greater than the critical angle of total reflection. Even if the test light does not enter the inside of the liquid 100 to be tested, the absorption intensity is affected by the liquid 100 to be tested, and the information of the liquid 100 to be tested is reflected according to the absorption intensity. In this embodiment, since the test light does not enter the liquid 100 to be tested, the optical path cannot be changed by changing the depth of the sample cell 11. The present embodiment does not require the provision of a light barrier.

Embodiment III:

referring to fig. 5, the difference between the embodiment and the first embodiment is that the light incident surface 12 and the light emergent surface 13 of the transparent body 1 are both arc-shaped, the arc-shaped surface is similar to a convex lens, and has a certain light condensing effect, so that the light incident efficiency and the light emergent efficiency are improved.

Embodiment four:

referring to fig. 6 and 7, the difference between the embodiment and the third embodiment of the present application is that the transparent body 1 is a frustum, and the light emitting surface 13 and the light entering surface 12 are both cambered surfaces. In the same principle, the arc-shaped surface is similar to a convex lens, has a certain light condensing effect, and improves the light inlet and light outlet efficiency.

Fifth embodiment:

referring to fig. 8, the apparatus is different from the embodiment in that the apparatus further includes a housing 4, the light source 2 and the spectrum collection photosensor 3 are both located in the housing 4, the light source 2 is disposed on the housing 4 through a first position adjustment assembly 5, and the spectrum collection photosensor 3 is disposed on the housing 4 through a second position adjustment assembly 6.

When the liquid 100 to be measured is different, the refractive index is different, and the depth of the sample cell 11 is different, the optical path length of the optical path is not affected little, so that the light source 2 and the spectrum collection light sensor 3 can conveniently perform position adjustment for achieving better light entering and exiting effects. Since the light emitting surface 13 and the light entering surface 12 are both planar, the position adjustment in the Y direction has little meaning, and the position adjustment in the X direction and the Z direction can directly change the incident angle and the light emitting angle of the test light, and has a direct influence on the test result, so the first position adjustment assembly 5 and the second position adjustment assembly 6 at least include the X position adjustment assemblies 51, 61 and the Z position adjustment assemblies 52, 62.

Example six:

referring to fig. 9 and 10, a difference from the embodiment is that the side wall of the sample cell 11 is further provided with overflow grooves 14, a soft rubber plug 15 is disposed at the overflow groove 14, the soft rubber plug 15 can prevent the liquid 100 to be tested from leaking from the overflow groove 14, the number of the overflow grooves 14 at the side wall of the sample cell 11 is plural, and the heights of the overflow grooves 14 are different.

Because this application adjusts the optical path of test light in liquid 100 that awaits measuring through the degree of depth of sample cell 11, so the optical path is different, just needs whole change transparent body 1, and accessory quantity is many, and is with high costs, and it is more time consuming and laborious to change. For this purpose, a deeper sample cell 11 is firstly made on the transparent body 1, then the overflow grooves 14 with different heights are arranged on the side wall of the sample cell 11, what depth is needed, the soft rubber plug heads 15 at corresponding positions are pulled out, and the liquid 100 to be measured overflows from the corresponding overflow grooves 14, so that the liquid 100 to be measured is ensured to have a specific thickness. The same transparent body 1 can be changed into a plurality of sample tanks 11 with different depths, the number of accessories is greatly reduced, the transparent body 1 does not need to be replaced, and the corresponding soft rubber plug 15 is pulled out, so that the time and the labor are saved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (9)

1. The utility model provides a vertical ascending open absorption spectrum collection system, its characterized in that, includes transparent body (1), light source (2) and spectrum collection light sensor (3), the top surface of transparent body (1) is equipped with open sample cell (11), the side of transparent body (1) is equipped with into plain noodles (12) and play plain noodles (13), light source (2) set up in income plain noodles (12) department for with test light to liquid (100) that awaits measuring in sample cell (11), spectrum collection light sensor (3) set up in play plain noodles (13) department for gather the absorption spectrum of liquid (100) that awaits measuring.

2. The vertical upward open type absorption spectrum collecting device according to claim 1, wherein the light exit surface (13) and the light entrance surface (12) are both planes inclined to a horizontal plane.

3. The vertical upward open type absorption spectrum collecting device according to claim 2, wherein the test light emitted by the light source (2) is perpendicular to the light incident surface (12), the angle of inclination of the light incident surface (12) makes the incident angle of the test light on the upper surface of the liquid (100) to be tested greater than the critical angle of total reflection, and a light blocking plate (7) is further arranged in the transparent body (1) and used for blocking the test light reflected from the lower surface of the liquid (100) to be tested to the spectrum collecting light sensor (3).

4. The vertical upward open type absorption spectrum collecting device according to claim 2, wherein the test light emitted by the light source (2) is perpendicular to the light incident surface (12), and the inclination angle of the light incident surface (12) makes the incident angle of the test light on the lower surface of the liquid (100) to be measured larger than the critical angle of total reflection.

5. The vertical upward open type absorption spectrum collecting device according to claim 1, wherein the transparent body (1) is a frustum, and the light emitting surface (13) and the light entering surface (12) are cambered surfaces.

6. The vertical upward open type absorption spectrum collecting device according to claim 1, wherein the side wall of the sample cell (11) is further provided with an overflow groove (14), and a soft rubber plug (15) is arranged at the overflow groove (14).

7. The vertical upward open type absorption spectrum collecting apparatus according to claim 6, wherein the number of overflow grooves (14) of the side wall of the sample cell (11) is plural, and the height of each overflow groove (14) is different.

8. The vertically upward open absorption spectrum collecting device according to claim 1, further comprising a housing (4), wherein the light source (2) and the spectrum collecting light sensor (3) are both located in the housing (4), wherein the light source (2) is arranged on the housing (4) by means of a first position adjusting assembly (5), and wherein the spectrum collecting light sensor (3) is arranged on the housing (4) by means of a second position adjusting assembly (6).

9. The vertically upward open absorption spectrum collecting device according to claim 8, wherein the first position adjusting assembly (5) and the second position adjusting assembly (6) comprise at least an X position adjusting assembly and a Z position adjusting assembly.

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