CN213986174U - Variable optical path is extinction photometer under water - Google Patents
Variable optical path is extinction photometer under water Download PDFInfo
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- CN213986174U CN213986174U CN202022941530.XU CN202022941530U CN213986174U CN 213986174 U CN213986174 U CN 213986174U CN 202022941530 U CN202022941530 U CN 202022941530U CN 213986174 U CN213986174 U CN 213986174U
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Abstract
The utility model provides a variable optical path underwater absorption photometer, which comprises a shell, a light source, a main structural member, a variable optical path window, an optical window, a first sensor and a second sensor, wherein the light source, the main structural member, the variable optical path window, the optical window, the first sensor and the second sensor are arranged in the shell; the optical signal of the first path reaches the first sensor through the main structure member, the variable optical path window and the optical window, and is received and detected by the first sensor, and the optical signal of the second path is received and detected by the second sensor; a window shell, an optical lens and a switching piece are arranged in the variable optical path window, the switching piece is sleeved in the window shell, a channel is arranged in the switching piece, one end of the channel is close to the main structural member, and the optical lens is arranged at one end of the channel, which is close to the main structural member; the variable optical path window is detachably connected with the main structural member. Compared with the prior art, the utility model discloses can select suitable measuring range to target parameter to satisfy multi-scene water quality monitoring demands such as sea water, lake and marsh water, domestic water and sewage simultaneously.
Description
Technical Field
The utility model belongs to the technical field of photoelectric sensor, particularly, especially, relate to a variable optical path extinction photometer under water.
Background
Water is a source of life, and human beings can not leave water in life and production activities. However, with the rapid development of the economy and the acceleration of the urbanization process in China, the problem of exposed water environment pollution is more and more serious, the water quality or water body pollution events are frequent, and the situation of the water environment in China is highlighted. The quality of the water quality is closely related to the industrial and agricultural production safety and human health, and the quality of the water quality is judged, predicted and monitored by relying on the water quality detection technology for guarantee.
Underwater photoelectric sensors, which are modeled by absorbance at a single or multiple wavelengths as a method for detecting a substance component, are collectively called an underwater absorption photometer, and include a Chemical Oxygen Demand (COD) sensor, a Total Organic Carbon (TOC) sensor, a nitrate-nitrogen sensor, a nitrite-nitrogen sensor, a total suspended particulate matter sensor, and the like. The underwater absorption photometer with fixed optical path can not meet various water quality monitoring requirements at the same time, for example, the COD sensor is applied to the sewage detection, the detection range is 0-1000mg/L and the corresponding optical path is 2-5mm, while the detection range applied to the seawater detection is 0-10mg/L and the corresponding optical path is 50-100 mm.
In the prior art, an underwater absorption photometer cannot adjust the optical distance, and if the underwater absorption photometer needs to work under various scenes, detectors of various models must be purchased, so that the technical detection cost is increased.
To the problem, the utility model discloses can adjust optical path length according to the detection demand, select the measuring range who is fit for to target parameter to satisfy multi-scene water quality monitoring demands such as sea water, lake and marsh water, domestic water and sewage simultaneously.
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiencies of the prior art, the present invention provides a concept with switchable windows to achieve the requirements of a variety of measurement ranges, in particular a variable optical path underwater absorption photometer, which can solve at least one of the aforementioned technical problems. Specifically, the technical scheme is as follows:
a variable optical path underwater absorption photometer comprises a shell, a light source, a main structure member, a variable optical path window, an optical window, a first sensor and a second sensor, wherein the light source, the main structure member, the variable optical path window, the optical window, the first sensor and the second sensor are arranged in the shell;
the light emitted by the light source is divided into a first path and a second path, the optical signal of the first path reaches the first sensor through the main structural component, the variable optical path window and the optical window and is received and detected by the first sensor, and the optical signal of the second path is received and detected by the second sensor;
a window shell, an optical lens and an adapter piece are arranged in the variable optical path window, the adapter piece is sleeved in the window shell, a channel is arranged in the adapter piece, one end of the channel is close to the main structural component, and the optical lens is arranged at one end of the channel, which is close to the main structural component;
the variable optical path window is detachably connected with the main structural member.
In a specific embodiment, the main structure member is provided with a passage, the passage is communicated with the channel, the main structure member is provided with a fixing hole, and the window shell is connected with the main structure member through the fixing hole.
In a specific embodiment, the window frame further comprises a boss, the boss comprises a first cylinder and a second cylinder, the first cylinder and the second cylinder are coaxially arranged, the axial directions of the first cylinder and the second cylinder are consistent with the axial direction of the channel, and a step groove is formed at one end, away from the main structure, of the window housing and one end, away from the main structure, of the adapter, of the window housing so as to accommodate the boss.
In a specific embodiment, a groove is formed in the window housing around the second cylinder, and a silica gel ring is arranged in the groove.
In a specific embodiment, the optical lens further comprises a fixing block, wherein the fixing block is arranged at one end of the channel close to the main structure part and is used for fixing the optical lens.
In a specific embodiment, the optical path length of the optical signal propagating direction of the first path is different from that of the optical path length of the optical signal propagating direction of the second path.
In a specific embodiment, the length between the variable optical path window and the optical window is 20-200 mm.
In a specific embodiment, the length between the variable optical path window and the optical window is 50-150 mm.
In a specific embodiment, the length between the variable optical path window and the optical window is 90-120 mm.
In a specific embodiment, the lighting device further includes a half mirror, and light emitted from the light source is divided into the first path and the second path through the half mirror.
The utility model discloses following beneficial effect has at least:
the utility model provides a variable optical path is extinction photometer under water, variable optical path window can dismantle connection subject structure spare, the variable optical path window of removable difference to change optical path length, can select the measuring range that is fit for to target parameter, with satisfy many scenes water quality monitoring demands such as sea water, lake and marsh water, domestic water and sewage simultaneously.
Furthermore, the arrangement of the fixing hole enables the window shell to be detachably connected with the main structure.
Furthermore, due to the design of the boss, air bubbles can be effectively prevented from being reserved in the channel to influence the measurement result.
Furthermore, the variable optical path windows with various specifications can meet the requirements of different measurement ranges.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic representation of a variable optical path underwater absorption photometer in accordance with an embodiment;
FIG. 2 is a schematic diagram of a variable optical path window and body structure for a variable optical path underwater absorption photometer according to an embodiment;
FIG. 3 is a schematic diagram of the path length of a variable path underwater absorption photometer in accordance with an embodiment.
Description of the main element symbols:
1-a light source; 2-a variable optical path window; 3-an optical window; 4-a first sensor; 5-a second sensor; 6-main structural part; 7-window housing; 8-quartz lens; 9-a via; 10-channel; 11-an optical lens; 12-an adaptor; 13-a half-transmitting and half-reflecting mirror; 14-a housing; 15-open detection zone; 16-silica gel ring; 17-a boss; 18-a first cylinder; 19-a second column; 20-fixing holes; and 21, fixing blocks.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1, the variable optical path underwater absorption photometer comprises a housing 14, a light source 1 arranged in the housing 14, a quartz lens 8, a half-mirror 13, a variable optical path window 2, an open detection area 15, an optical window 3, a first sensor 4 and a second sensor 5. Further, a body structure 6 is included that is connected to the variable optical path window 2.
The optical signal emitted by the light source 1 is divided into two paths, the optical signal of the first path reaches the first sensor 4 through the variable optical path window 2 and the optical window 3, and the optical signal of the second path can reach the second sensor 5.
Specifically, light emitted by the light source 1 reaches the half-transmitting half-reflecting mirror 13 through the quartz lens 8, and then is divided into a first path and a second path through the half-transmitting half-reflecting mirror 13, a light signal of the first path transmits through the half-transmitting half-reflecting mirror 13, and reaches the first sensor 4 arranged behind the optical window 3 through the main structural member 6, the variable optical path window 2, the open detection area 15 and the optical window 3, and a light signal of the second path is reflected through the half-transmitting half-reflecting mirror 13 to reach the second sensor 5.
During the measurement, the absorbance values of the plurality of wavelengths are calculated by the formula a (λ) ═ Log [ IR (λ)/IS (λ) ], where a (λ) IS the absorbance value of the wavelength λ, IR (λ) IS the reference light intensity of the wavelength λ, which IS measured by the second sensor 55 in fig. 1, and IS (λ) IS the signal light intensity of the wavelength λ, which IS measured by the first sensor 4 in fig. 1.
In this embodiment, the light source 1 is a multi-wavelength light source 1 module formed by combining a plurality of single-wavelength LEDs, the arrangement mode of the LEDs is not limited, and the LEDs may be linear, annular, irregular, and the like, and different wavelength combinations are selected according to different detection requirements; the light source 1 includes, but is not limited to, a plurality of single-wavelength LEDs, and may further include a light source 1 composed of a broad-spectrum light source 1 and an optical filter, a light source 1 composed of a broad-spectrum light source 1 and a monochromator, and a light source 1 composed of a plurality of single-wavelength laser diodes LD.
An ultraviolet light sensor in the first sensor 4 corresponds to an ultraviolet light LED, and a visible light sensor corresponds to a visible light LED; the ultraviolet light sensor in the second sensor 5 corresponds to the ultraviolet light LED, and the visible light sensor corresponds to the visible light LED.
As shown in fig. 2, fig. 2 is a schematic connection diagram of a main structure member 6 and a variable optical path window 2, the main structure member 6 is provided with a passage 9, the variable optical path window 2 includes a window housing 7, an adapter 12, and an optical lens 11, the adapter 12 is sleeved in the window housing 7, a channel 10 is provided inside the adapter 12, and the passage 9 is communicated with the channel 10.
An optical lens 11 is disposed at an end of the channel 10 adjacent the body structure 6. Preferably, the material of the optical lens 11 is fused silica having high transmittance of ultraviolet light. Preferably, a fixing block 21 is included, the fixing block 21 being disposed at an end of the channel 10 near the main structure 6 for fixing the optical lens 11.
The variable optical path window 2 is detachably connected to the main structure member 6. The main structure member 6 is provided with a fixing hole 20, and the window housing 7 is detachably attached to the main structure member 6 through the fixing hole 20. For example, the window housing 7 is provided with screw holes corresponding to the fixing holes 20, so that the window housing 7 can be fixed to the inside of the body structural member 6 by screws. In other embodiments, the optical path variable window 2 and the main structure 6 may be detachably connected by a connector such as a snap.
The utility model discloses a variable optical path is extinction photometer under water, variable optical path window 2 detachably connect major structure 6, can conveniently change variable optical path window 2 of unidimensional to change the length of optical path in the sample that awaits measuring of light signal, can select the measuring range that is fit for to target parameter, with satisfy many scenes water quality monitoring demands such as sea water, lake and marsh water, domestic water and sewage simultaneously.
In this embodiment, as shown in fig. 2, in the direction of the optical window 3, the boss 17 is disposed at an end away from the main structure member 6, the boss 17 includes a first cylinder 18 and a second cylinder 19, the first cylinder 18 and the second cylinder 19 are coaxially disposed, the axial directions of the first cylinder 18 and the second cylinder 19 are consistent with the axial direction of the channel 10, the diameter of the second cylinder 19 is smaller than that of the first cylinder 18, and a stepped groove is formed at an end of the window housing 7 away from the main structure member 6 and an end of the adaptor 12 away from the main structure member 6 to accommodate the boss 17. The design of the boss 17 as a window effectively prevents air bubbles from residing in the channel 10 to affect the measurement results. Meanwhile, the boss 17 adopts an axial sealing structure so as to save the space required by the sealing structure. Preferably, the boss 17 is a fused silica material with high transmittance of ultraviolet light.
When the photometer detects water quality in multiple scenes such as seawater, lake and marsh water, domestic water, sewage, laboratories and the like, the tightness of the photometer needs to be guaranteed, in order to achieve the tightness prevention effect, the window shell 7 is provided with a groove around the second column 19, and the groove is internally provided with a silica gel ring 16. The arrangement of the silica gel ring 16 ensures the tightness of the variable optical path window 2.
As shown in fig. 3, fig. 3 is a schematic diagram of a variable optical path window 2 and an optical window 3, an open detection area is between the variable optical path optical window 3 and the optical window 3, a sample to be detected is located in the open detection area, a is the length of the variable optical path window 2, and B is the optical path length of an optical signal in the sample to be detected, and a plurality of variable optical path windows 2 with different sizes can be customized according to actual requirements, so as to meet requirements for different optical path lengths B in different application scenarios.
Specifically, a plurality of variable optical path windows 2 of a plurality of sizes are included, and the size of the variable optical path window 2 of each size is different along the optical signal propagation direction of the first path. The length between the variable optical path window 2 and the optical window 3 is 20-200mm, preferably the length between the variable optical path window 2 and the optical window 3 is 100mm, optionally the length between the variable optical path window 2 and the optical window 3 is 50-150mm, optionally the length between the variable optical path window 2 and the optical window 3 is 90-120 mm. By replacing the variable optical path window 2 with different specifications, different measurement ranges can be achieved.
Preferably, when the photometer is operated in a variety of settings, the housing 14 needs to be seawater-resistant, water-tight and pressure-resistant to prolong the lifetime of the photometer.
The utility model discloses a special control chronogenesis design, the LED of controlling different wavelengths is luminous at the time of difference, designs into corresponding LED's emission time with photoelectric detector's start-stop time. The existing underwater absorption photometer mostly adopts an optical filter to perform multi-wavelength spectroscopy, but in the embodiment, the corresponding design based on the light source 1 and the detector can achieve the effect of no need of using the optical filter through time sequence spectroscopy design, and the cost is greatly reduced.
Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The sequence numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the implementation scenario.
The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.
Claims (10)
1. A variable optical path underwater absorption photometer is characterized by comprising a shell, a light source, a main structure, a variable optical path window, an optical window, a first sensor and a second sensor, wherein the light source, the main structure, the variable optical path window, the optical window, the first sensor and the second sensor are arranged in the shell;
the light emitted by the light source is divided into a first path and a second path, the optical signal of the first path reaches the first sensor through the main structural component, the variable optical path window and the optical window and is received and detected by the first sensor, and the optical signal of the second path is received and detected by the second sensor;
a window shell, an optical lens and an adapter piece are arranged in the variable optical path window, the adapter piece is sleeved in the window shell, a channel is arranged in the adapter piece, one end of the channel is close to the main structural component, and the optical lens is arranged at one end of the channel, which is close to the main structural component;
the variable optical path window is detachably connected with the main structural member.
2. The variable optical path underwater absorbance photometer of claim 1, wherein said main structure is provided with a passage communicating with said channel, said main structure is provided with a fixing hole, and said window housing is connected to said main structure through said fixing hole.
3. The underwater absorption photometer of any one of claims 1-2, further comprising a boss, wherein the boss comprises a first cylinder and a second cylinder, the first cylinder and the second cylinder are coaxially disposed, the axial directions of the first cylinder and the second cylinder are consistent with the axial direction of the channel, and a stepped recess is formed at one end of the window housing away from the main structure and at one end of the adaptor away from the main structure to accommodate the boss.
4. The variable optical path underwater absorption photometer of claim 3, wherein the window housing is provided with a groove around the second cylinder, the groove being provided with a silicone ring.
5. The variable optical path underwater absorbance photometer of claim 1 further comprising a fixing block disposed at an end of said channel adjacent to said body structure for fixing said optical lens.
6. The variable optical path underwater absorbance photometer of claim 1 comprising a plurality of said variable optical path windows of a plurality of sizes, each size different in size along the direction of propagation of the optical signal of said first path.
7. The variable optical path underwater absorbance photometer of claim 6 wherein the length between said variable optical path window and said optical window is 20-200 mm.
8. The variable optical path underwater absorbance photometer of claim 7 wherein the length between said variable optical path window and said optical window is 50-150 mm.
9. The variable optical path underwater absorbance photometer of claim 8 wherein the length between said variable optical path window and said optical window is 90-120 mm.
10. The variable optical path underwater absorption photometer of claim 1, further comprising a half mirror, wherein the light emitted from the light source is divided into the first path and the second path by the half mirror.
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| CN202022941530.XU CN213986174U (en) | 2020-12-10 | 2020-12-10 | Variable optical path is extinction photometer under water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199795A (en) * | 2021-10-26 | 2022-03-18 | 中国科学院深圳先进技术研究院 | Underwater absorptiometer and water quality detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199795A (en) * | 2021-10-26 | 2022-03-18 | 中国科学院深圳先进技术研究院 | Underwater absorptiometer and water quality detection method |
| WO2023070838A1 (en) * | 2021-10-26 | 2023-05-04 | 中国科学院深圳先进技术研究院 | Underwater absorbance photometer and water quality detection method |
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