CN215812392U - Portable spectrum method water quality detection sensor - Google Patents
Portable spectrum method water quality detection sensor Download PDFInfo
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- CN215812392U CN215812392U CN202121202964.6U CN202121202964U CN215812392U CN 215812392 U CN215812392 U CN 215812392U CN 202121202964 U CN202121202964 U CN 202121202964U CN 215812392 U CN215812392 U CN 215812392U
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Abstract
The utility model relates to a portable spectrum method water quality detection sensor, which comprises a focusing light source, a first optical unit, a measuring absorption cell unit, a second optical unit and a spectrum device unit which are connected in sequence, wherein the first optical unit divides light emitted by the focusing light source into two paths, penetrates through the measuring absorption cell unit and then enters the spectrum device unit through the second optical unit in turn; the utility model utilizes different absorption effects of different components in water quality on different wavelengths of light to carry out quantitative calculation of water quality component content, can be widely applied to online detection of surface water quality of rivers, lakes, reservoirs and the like, and can detect parameters such as COD, BOD, TOC, DOC, nitrate nitrogen, nitrite nitrogen, turbidity, TSS and the like in water.
Description
Technical Field
The utility model relates to the technical field of energy environment-friendly water quality detection, in particular to a portable spectrum water quality detection sensor.
Background
Most of water quality detection utilizes chemical reagents to detect a water sample to be detected. The laboratory chemical analysis method has long detection period and frequent and complex operation, can not quickly reflect the water quality condition in real time and can not meet the real-time, on-line and quick water quality detection requirements; and the consumed chemical reagent has the problems of secondary pollution and the like, and the automation degree is low, so that the requirement of the modern water quality detection technology is difficult to meet, and the requirement of the green pollution-free detection technology cannot be met.
Some water quality spectrum detectors can only detect COD single parameter, and generally use dual wavelengths for detection.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a portable spectrum water quality detection sensor to realize multi-parameter detection of water.
The technical scheme adopted by the utility model is as follows:
a portable spectrum method water quality detection sensor comprises a focusing light source, a first optical unit, a measuring absorption cell unit, a second optical unit and a spectrum device unit which are sequentially connected, wherein the first optical unit divides light emitted by the focusing light source into two paths, penetrates through the measuring absorption cell unit and then enters the spectrum device unit through the second optical unit in turn.
Furthermore, the first optical unit comprises a first bifurcated optical fiber connected with the focusing light source and collimating lens barrels respectively arranged at two bifurcated end parts of the first bifurcated optical fiber, and biconvex lenses are arranged in the collimating lens barrels.
Furthermore, the second optical unit comprises a second bifurcated optical fiber and a receiving optical fiber, one end of the second bifurcated optical fiber is connected with the measurement absorption cell unit through a focusing lens barrel, the receiving optical fiber is connected with the second bifurcated optical fiber, the other end of the receiving optical fiber is connected with the spectrometer unit, and a biconvex lens is arranged in the focusing lens barrel.
Furthermore, the measurement absorption cell unit comprises a first baffle and a second baffle which are arranged oppositely, a first window monitoring fixed block and a second window monitoring fixed block which are respectively arranged on the first baffle and the second baffle, and a sealing glassware which is arranged between the first baffle and the second baffle through a reference light transmission channel, wherein the first window monitoring fixed block and the second window monitoring fixed block are corresponding in position and correspond to a branched light path of the first branched optical fiber and the second branched optical fiber, and the reference light transmission channel corresponds to another branched light path of the first branched optical fiber and the second branched optical fiber.
Further, a gear disc is arranged between the second baffle and the focusing lens cone, a motor is arranged on one side of the gear disc, an output shaft of the motor is meshed with the gear disc through a gear, a through hole is formed in the gear disc, and when the through hole rotates to a corresponding position, one of the branched light paths of the first branched optical fiber and the second branched optical fiber is communicated.
Furthermore, sapphire window lenses are respectively arranged in the channels of the first window monitoring fixed block and the second window monitoring fixed block.
Furthermore, the spectrometer unit comprises a box body, a stainless steel slit arranged on the side wall of the box body, a collimating objective lens arranged in the box body and corresponding to the receiving optical fiber, a plane grating for receiving parallel light behind the collimating objective lens, an imaging objective lens for receiving light beams dispersed by the plane grating and a linear array CMOS photosensitive surface for receiving focusing light spots behind the imaging objective lens, wherein light at the other end of the receiving optical fiber enters the box body after passing through the stainless steel slit.
Further, an optical filter support is arranged between the imaging objective lens and the linear array CMOS photosensitive surface, an oblong hole parallel to the linear array CMOS photosensitive surface is formed in the lower portion of the optical filter support, a screw is arranged in the oblong hole to install the optical filter support in the box body, and an optical filter is arranged on the optical filter support.
Further, the imaging objective lens is arranged on an imaging objective lens support, a long circular hole facing to the linear array CMOS photosensitive surface is formed in the lower portion of the imaging objective lens support, and a screw is arranged in the long circular hole to install the imaging objective lens support in the box body;
the collimating objective is installed on the collimating objective support, a long round hole facing the stainless steel slit is formed in the lower portion of the collimating objective support, and a screw is arranged in the long round hole to install the collimating objective support in the box body.
Further, formation of image objective passes through the formation of image objective support and installs in the box body, the formation of image objective support includes the support body and sets up the layer board on the support body through the pivot, formation of image objective sets up on the layer board, there is the damping between pivot and the support body.
The utility model has the positive effects that: the utility model utilizes different absorption effects of different components in water quality on different wavelengths of light to carry out quantitative calculation of water quality component content, can be widely applied to online detection of surface water quality of rivers, lakes, reservoirs and the like, and can detect parameters such as COD, BOD, TOC, DOC, nitrate nitrogen, nitrite nitrogen, turbidity, TSS and the like in water. The absorption of a plurality of wavelengths is used for comprehensive contrast detection, and the detection is not carried out by a fixed wavelength. The detection principle is that a reference and measurement light path is switched by the rotation of a motor, an absorbance value is calculated by using energy received by a CMOS in a spectrometer, and a concentration value is calculated by absorbance conversion.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the structure of a measuring absorption cell unit according to the present invention;
FIG. 3 is a schematic cross-sectional view of a measuring cell unit according to the present invention;
FIG. 4 is a schematic structural view of a gear plate according to the present invention;
FIG. 5 is a schematic diagram of a spectrometer cell according to the present invention;
FIG. 6 is a schematic view of the structure of the holder for an imaging objective lens according to the present invention;
fig. 7 is a complete block diagram of the present invention in use.
Detailed Description
As shown in fig. 1-7, the present invention includes a focusing light source, a first optical unit, a measuring absorption cell unit, a second optical unit, and a spectrometer unit, and is also provided with a corresponding control circuit, but through the description of the present application, a person skilled in the art can know how to configure a specific control circuit, and the present application is not described in detail again.
The first optical unit comprises a first branched optical fiber 2 connected with the focusing light source 1 and collimating lens barrels 3 respectively arranged at two branched end parts of the first branched optical fiber 2, and biconvex lenses are arranged in the collimating lens barrels 3.
The second optical unit includes a receiving optical fiber, a second bifurcated optical fiber 4 connected to the receiving optical fiber, and a focus lens barrel 15 provided on a bifurcated optical path of the second bifurcated optical fiber 4, and a biconvex lens is provided in the focus lens barrel 15.
The first optical unit divides the light emitted by the focusing light source 1 into two paths, passes through the measuring absorption cell unit, and then enters the spectrometer unit 5 through the second optical unit in turn.
The measuring absorption cell unit has two optical paths corresponding to the two branched optical paths of the first branched optical fiber 2 and the second branched optical fiber 4, respectively. The structure of the sealed glass ware comprises a first baffle plate 13 and a second baffle plate 8 which are arranged oppositely, a first window monitoring fixed block 12 and a second window monitoring fixed block 11 which are respectively arranged on the first baffle plate 13 and the second baffle plate 8, and a sealed glass ware 16 which is arranged between the first baffle plate 13 and the second baffle plate 8 through a reference light transmission channel 17, wherein distilled water is arranged in the sealed glass ware 16, and the reference light transmission channel passes through the sealed glass ware. The collimator lens barrel 3 is fixed on the first baffle 13 through a collimator lens barrel support 14, and the focus lens barrel 15 is fixed on the second baffle 8 through a focus lens barrel support 6. Sapphire window lenses are respectively arranged in the channels of the first window monitoring fixed block 12 and the second window monitoring fixed block 11.
Two bifurcated optical paths of the first bifurcated optical fiber 2 are defined as a first bifurcated optical path A and a first bifurcated optical path B respectively, two bifurcated optical paths of the second bifurcated optical fiber 4 are defined as a second bifurcated optical path A and a second bifurcated optical path B respectively, so that the first bifurcated optical path A, the first window monitoring fixed block 12, the second window monitoring fixed block 11 and the second bifurcated optical path A form an optical path, and the first bifurcated optical path B, the reference light transmitting path 17, the sealed glassware 16 and the second bifurcated optical path B form an optical path.
A gear disc 9 is arranged between the second baffle 8 and the focusing lens cone 15, a motor 7 is arranged on one side of the gear disc 9, an output shaft of the motor 7 is meshed with the gear disc 9 through a gear 10, a through hole 18 is formed in the gear disc 9, and when the through hole 18 rotates to a corresponding position, one of the branched light paths of the first branched optical fiber 2 and the second branched optical fiber 4 is communicated. Specifically, only one of the two optical paths of the measuring absorption cell unit can form a passage at the same time, the other optical path is closed due to the blockage of the gear disc, and the two optical paths form the passage in turn through the rotation of the gear disc 9.
The spectrometer unit 5 comprises a box body 501, an optical fiber seat arranged on the side wall of the box body 501, a stainless steel slit 502 arranged at the position of the optical fiber seat, a collimating objective 503 corresponding to the position of the optical fiber seat, a plane grating 507 for receiving parallel light behind the collimating objective 503, an imaging objective 506 for receiving light beams dispersed by the plane grating 507, and a linear array CMOS photosensitive surface 505 for receiving focusing light spots behind the imaging objective 506, wherein a light filter support 504 is arranged between the imaging objective 506 and the linear array CMOS photosensitive surface 505, a light filter is arranged in the light filter support 504, and the imaging objective 506 is a concave mirror reflector.
The optical filter support 504 is provided with oblong holes parallel to the linear array CMOS photosensitive surface 505, screws are arranged in the oblong holes to install the optical filter support 504 in the box body 501, and the position of the optical filter support 504 in the direction parallel to the linear array CMOS photosensitive surface 505 can be adjusted through the oblong holes.
The imaging objective 506 is mounted on an imaging objective support 508, an oblong hole facing the linear array CMOS photosurface 505 is formed in the imaging objective support 508, and a screw is arranged in the oblong hole to mount the imaging objective support 508 in the box body 501. When the mounting position of the imaging objective lens is adjusted, the distance between the imaging objective lens 506 and the linear array CMOS photosensitive surface 505 can be adjusted.
The imaging objective holder 508 includes a holder 5081 and a pallet 5082 provided on the holder 5081 by a rotation shaft 5083, the imaging objective 506 is provided on the pallet 5082, and a damping is provided between the rotation shaft 5083 and the holder 5081, so that a pitch angle of the imaging objective 506 can be adjusted by adjusting an angle of the pallet 5082.
The collimator lens 503 is mounted on a collimator lens holder 509, an oblong hole facing the stainless steel slit 502 is formed in the collimator lens holder 509, and a screw is provided in the oblong hole to mount the collimator lens holder 509 in the box body 501.
The plane grating 507 is installed on the plane grating support, an arc-shaped hole is formed in the plane grating support, a bolt is arranged in the arc-shaped hole to install the plane grating support in the box body 501, and the angle between the plane grating 507 and the imaging objective 506 can be adjusted.
A light blocking sheet 510 is arranged between the plane grating 507 and the filter support 504, and a light blocking sheet 510 is also arranged below the collimator objective 503, so that stray light can be blocked.
The working principle of the utility model is as follows: the focusing light source 1 emits light, enters a first bifurcated optical fiber 2 of a first optical unit and then enters a collimating lens barrel, a gear wheel disc 9 is rotated through a control motor 7, reference and measurement channels are switched, the light enters a second bifurcated optical fiber of a second optical unit respectively and enters a stainless steel slit of a spectrometer unit through a receiving optical fiber, then a light spot is collimated through a collimating objective 503 and then irradiated on a plane grating 507, a light beam dispersed through the plane grating 507 is irradiated on an imaging objective 506, the imaging objective 506 focuses the light beam on a linear array CMOS photosensitive surface 505 through an optical filter, and an optical signal is converted into an electric signal.
Claims (10)
1. The utility model provides a portable spectrum method water quality testing sensor which characterized in that it is including focus light source (1), first optical unit, measurement absorption cell unit, second optical unit and spectrum appearance unit (5) that connect gradually, first optical unit is divided into two tunnel with the light that focus light source (1) sent and is passed and is measured absorption cell unit back rethread second optical unit and enter spectrum appearance unit (5) in turn.
2. A portable spectroscopic water quality sensor as set forth in claim 1 wherein said first optical unit comprises a first bifurcated optical fiber (2) connected to the focusing light source (1) and collimating lens barrels (3) respectively disposed at two bifurcated ends of the first bifurcated optical fiber (2), the collimating lens barrels (3) having biconvex lenses therein.
3. A portable spectroscopic water quality detection sensor as set forth in claim 2 wherein the second optical unit comprises a second bifurcated optical fiber (4) having one end connected to the measuring cell unit through a focusing barrel (15) and a receiving optical fiber connected to the second bifurcated optical fiber (4), the other end of the receiving optical fiber being connected to the spectrometer unit (5), a biconvex lens being provided in the focusing barrel (15).
4. A portable spectrometry water quality detection sensor as claimed in claim 3, wherein the measurement absorption cell unit comprises a first baffle (13) and a second baffle (8) arranged oppositely, a first window monitoring fixed block (12) and a second window monitoring fixed block (11) respectively arranged on the first baffle (13) and the second baffle (8), and a sealing glass vessel (16) arranged between the first baffle (13) and the second baffle (8) through a reference light transmission channel (17), the first window monitoring fixed block (12) and the second window monitoring fixed block (11) correspond in position and correspond to a branched light path of the first branched optical fiber (2) and the second branched optical fiber (4), the reference light transmission channel (17) corresponds to the other branch light path of the first branch optical fiber (2) and the second branch optical fiber (4).
5. A portable spectrometry water quality detection sensor according to claim 4, wherein a gear plate (9) is provided between the second baffle (8) and the focusing lens barrel (15), a motor (7) is provided at one side of the gear plate (9), an output shaft of the motor (7) is engaged with the gear plate (9) through a gear (10), a through hole (18) is provided on the gear plate (9), and when the through hole (18) is rotated to a corresponding position, one of the branched optical paths of the first branched optical fiber (2) and the second branched optical fiber (4) is communicated.
6. A portable spectrometry water quality detection sensor as claimed in claim 4, wherein sapphire window lenses are respectively provided in the channels of the first window monitoring fixed block (12) and the second window monitoring fixed block (11).
7. A portable spectrometry water quality sensor as claimed in claim 3, wherein said spectrometer unit (5) comprises a box (501), a stainless steel slit (502) disposed on the side wall of the box (501), a collimating objective lens (503) disposed in the box (501) and corresponding to the receiving fiber, a plane grating (507) for receiving the parallel light from the collimating objective lens (503), an imaging objective lens (506) for receiving the light beam dispersed by the plane grating (507), and a CMOS light sensitive surface (505) for receiving the focused light spot from the imaging objective lens (506), wherein the light from the other end of the receiving fiber enters the box (501) through the stainless steel slit (502).
8. The water quality detection sensor for the portable spectrum method according to claim 7, wherein a filter support (504) is arranged between the imaging objective lens (506) and the linear array CMOS photosensitive surface (505), an oblong hole parallel to the linear array CMOS photosensitive surface (505) is arranged under the filter support (504), a screw is arranged in the oblong hole to install the filter support (504) in the box body (501), and the filter is arranged on the filter support (504).
9. The portable water quality detection sensor for spectrometry as claimed in claim 7, wherein said imaging objective lens (506) is mounted on an imaging objective lens holder, an oblong hole facing to the linear array CMOS photosensitive surface (505) is formed in the imaging objective lens holder, and a screw is arranged in the oblong hole to mount the imaging objective lens holder in the box body (501);
the collimating objective lens (503) is arranged on a collimating objective lens bracket, a slotted hole facing the stainless steel slit (502) is formed in the lower portion of the collimating objective lens bracket, and a screw is arranged in the slotted hole to install the collimating objective lens bracket in the box body (501).
10. A portable spectroscopic water quality detection sensor as set forth in claim 7 wherein the imaging objective (506) is mounted in the cartridge (501) by an imaging objective holder (508), the imaging objective holder (508) comprising a holder (5081) and a pallet (5082) disposed on the holder (5081) by a hinge (5083), the imaging objective (506) being disposed on the pallet (5082), a damping being provided between the hinge (5083) and the holder (5081).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121202964.6U CN215812392U (en) | 2021-06-01 | 2021-06-01 | Portable spectrum method water quality detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121202964.6U CN215812392U (en) | 2021-06-01 | 2021-06-01 | Portable spectrum method water quality detection sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215812392U true CN215812392U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121202964.6U Active CN215812392U (en) | 2021-06-01 | 2021-06-01 | Portable spectrum method water quality detection sensor |
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| Country | Link |
|---|---|
| CN (1) | CN215812392U (en) |
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2021
- 2021-06-01 CN CN202121202964.6U patent/CN215812392U/en active Active
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