CN116930141A - CDOM deep sea sensor by ultraviolet fluorescence analysis method - Google Patents
CDOM deep sea sensor by ultraviolet fluorescence analysis method Download PDFInfo
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- CN116930141A CN116930141A CN202311174759.7A CN202311174759A CN116930141A CN 116930141 A CN116930141 A CN 116930141A CN 202311174759 A CN202311174759 A CN 202311174759A CN 116930141 A CN116930141 A CN 116930141A
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- 238000012921 fluorescence analysis Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title abstract description 15
- 229910052594 sapphire Inorganic materials 0.000 claims abstract description 61
- 239000010980 sapphire Substances 0.000 claims abstract description 61
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 229920006335 epoxy glue Polymers 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 13
- 239000004593 Epoxy Substances 0.000 claims description 6
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 229920006332 epoxy adhesive Polymers 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000013535 sea water Substances 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002795 fluorescence method Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a CDOM deep sea sensor adopting an ultraviolet fluorescence analysis method, which comprises a shell, an end cover, a light emitting component, a light receiving component, a control circuit and a watertight head. The housing has an interior cavity to accommodate other components. The end cover is arranged at the first end of the shell in a sealing way, and an outlet hole and an inlet hole are formed in the end cover. The light emission component is arranged in the emergent hole and comprises a first sapphire window and an emission light source. The light receiving assembly is arranged in the incident hole and comprises a second sapphire window, an optical filter and a photoelectric detector. The control circuit is arranged in the shell and is electrically connected with the emission light source and the photoelectric detector respectively. The watertight head is arranged at the second end of the shell in a sealing way and is electrically connected with the control circuit. Compared with the prior art, the invention uses epoxy glue as an optical window packaging tool through reasonable structural design, meets the pressure-bearing requirement of 4000 meters in depth level, has fewer parts and saves more space.
Description
Technical Field
The invention relates to the technical field of ocean monitoring sensors, in particular to a CDOM deep sea sensor adopting an ultraviolet fluorescence analysis method.
Background
In the field of deep sea monitoring and detection, in-situ sensors are an indispensable tool. The CDOM sensor based on ultraviolet fluorescence analysis method can be used for detecting colored soluble organic matters in water. The principle of ultraviolet fluorescence method for detecting the colored soluble organic matters in the water body is that the colored soluble organic matters in the water body are excited to generate fluorescence with specific wavelength by the high-energy LED light source according to the spectral absorption characteristics of the colored soluble organic matters, and the content of the colored soluble organic matters is calculated according to the intensity of the fluorescence. The method is suitable for measuring colored soluble organic matters in rivers, lakes and oceans, and has the characteristics of high sensitivity and small volume. Currently, most of the CDOM sensors of the ultraviolet fluorescence analysis method on the market are suitable for shallow water within 1000 meters. Along with the acceleration of human exploration in deep sea, the demands of the CDOM sensor with compact structure and high reliability by ultraviolet fluorescence analysis method with depth of more than 4000 meters are very urgent.
Disclosure of Invention
The invention aims to provide a CDOM deep sea sensor by ultraviolet fluorescence analysis method so as to meet the detection requirement of deep sea areas with depths of more than 4000 meters.
In order to achieve the above object, the present invention provides the following solutions:
the invention discloses a CDOM deep sea sensor of ultraviolet fluorescence analysis method, comprising:
a housing having an interior cavity;
the end cover is hermetically arranged at the first end of the shell, and is provided with an outlet hole and an incident hole;
the light emission assembly is arranged in the outlet hole and comprises a first sapphire window and an emission light source, and the emission light source is positioned on one side, close to the shell, of the first sapphire window;
the light receiving assembly is arranged in the incidence hole and comprises a second sapphire window, an optical filter and a photoelectric detector, the photoelectric detector is positioned on one side, close to the shell, of the second sapphire window, and the optical filter is positioned between the second sapphire window and the photoelectric detector;
the control circuit is arranged in the shell and is electrically connected with the emission light source and the photoelectric detector respectively;
the watertight head is hermetically arranged at the second end of the shell and is electrically connected with the control circuit;
the first sapphire window and the emergent hole, and the second sapphire window and the incident hole are connected through sealing and bonding of an epoxy adhesive layer.
Preferably, the CDOM deep sea sensor of ultraviolet fluorescence analysis method further comprises a threaded disc, wherein the threaded disc is positioned between the end cover and the control circuit; the thread disc is provided with a thread passing hole for passing a wire between the emission light source and the control circuit and a wire between the photoelectric detector and the control circuit; the inner wall of the shell is in threaded connection with the threaded disc, and the threaded disc is fixedly connected with the end cover.
Preferably, the threaded disc is fixedly connected with the control circuit.
Preferably, the control circuit includes a plurality of circuit boards and a plurality of screws; the two adjacent circuit boards are separated by a first sleeve, and the thread disc is separated from the adjacent circuit boards by a second sleeve; the screw passes through the first sleeve and the second sleeve at the same time and is in threaded connection with the thread disc.
Preferably, a sealing ring is arranged between the end cover and the shell, and a groove matched with the sealing ring is arranged on the end cover.
Preferably, the axis of the end cover, the axis of the exit hole and the axis of the entrance hole are coplanar, the included angle between the axis of the end cover and the axis of the exit hole is 32 degrees, and the included angle between the axis of the end cover and the axis of the entrance hole is 32 degrees.
Preferably, the thread disc is provided with a positioning pin, the end cover is provided with a positioning hole, and the positioning pin is connected with the positioning hole in an inserting manner.
Preferably, the side surfaces of the first sapphire window and the second sapphire window are frosted surfaces, and the frosted surfaces are used for adhering the epoxy glue layer.
Preferably, the thickness of the epoxy glue layer is 0.06mm to 0.09mm.
Preferably, the emission light source is fixed in the exit hole through a first screw thread pressing ring in a pressing mode, and the photoelectric detector is fixed in the entrance hole through a second screw thread pressing ring in a pressing mode.
Compared with the prior art, the invention has the following technical effects:
according to the invention, through reasonable structural design, epoxy glue is used as an optical window packaging tool, and the pressure-bearing requirement of 4000 meters in depth level is met. Compared with the traditional structure form of the matching of the sealing ring and the pressing plate, fewer parts are needed, and space is saved.
In the preferred scheme of the invention, through the angle design of the input hole and the output hole, the steering angle of the light rays in the seawater is close to 90 degrees, so that the influence of the radiation of the excitation light source on the detection of the fluorescent signal of the detector is reduced as much as possible.
In the preferred scheme of the invention, the problems that the radial space is excessively occupied and the space is insufficient to design the integrated mounting threads due to the problems of window angles and window sizes are avoided by adopting the mode of matching the end cover with the threaded disc. Further, the sensor is miniaturized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an exploded view of a CDOM deep sea sensor employing UV fluorescence analysis in accordance with an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a CDOM deep sea sensor using UV fluorescence analysis in accordance with an embodiment of the present invention;
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is a cross-sectional view of the end cap;
FIG. 5 is a schematic diagram of a light path;
FIG. 6 is a schematic view of a sapphire window at one viewing angle;
fig. 7 is a schematic view of another view of a sapphire window.
Reference numerals illustrate: 1-a housing; 2-end caps; 3-an emission light source; 4-a photodetector; 5-a first sapphire window; a 5' -second sapphire window; 6-a thread disc; 7-fastening a screw; 8-a sleeve; 9-a screw; 10-a control circuit; 11-a sealing ring; 12-a threaded compression ring; 13-watertight head; 14-an epoxy adhesive layer; 15-an optical filter; 16-light-transmitting surface; 17-frosted surface.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a CDOM deep sea sensor by ultraviolet fluorescence analysis method so as to meet the detection requirement of deep sea areas with depths of more than 4000 meters.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. In this embodiment, "seal-mounted" means that the joint between the two is sealed.
Referring to fig. 1 to 7, the present embodiment provides a CDOM deep sea sensor using ultraviolet fluorescence analysis, which includes a housing 1, an end cover 2, a light emitting component, a light receiving component, a control circuit 10 and a watertight head 13.
The housing 1 has an inner cavity to accommodate other components. The end cover 2 is mounted on the first end of the shell 1 in a sealing way, and an outlet hole and an inlet hole are formed in the end cover 2. The light emission component is arranged in the emergent hole and comprises a first sapphire window 5 and an emission light source 3, and the emission light source 3 is positioned on one side, close to the shell 1, of the first sapphire window 5. The light receiving assembly is arranged in the incident hole and comprises a second sapphire window 5', an optical filter 15 and a photoelectric detector 4, the photoelectric detector 4 is positioned on one side, close to the shell 1, of the second sapphire window 5', and the optical filter 15 is positioned between the second sapphire window 5' and the photoelectric detector 4. The control circuit 10 is installed in the housing 1, and the control circuit 10 is electrically connected with the emission light source 3 and the photodetector 4, respectively. The watertight head 13 is mounted on the second end of the shell 1 in a sealing way, and the watertight head 13 is electrically connected with the control circuit 10.
The first sapphire window 5 and the exit hole, and the second sapphire window 5' and the incident hole are connected by sealing and bonding through an epoxy layer 14. That is, the epoxy layer 14 completely fills the gap between the first sapphire window 5 and the exit hole, and between the second sapphire window 5' and the entrance hole.
The working principle of the CDOM deep sea sensor of the ultraviolet fluorescence analysis method of the embodiment is as follows:
the control circuit 10 controls the emission light source 3 to be turned on, the emission light source 3 emits light (high-energy LED light for ultraviolet fluorescence analysis), the light passes through the first sapphire window 5 and then enters water and irradiates colored soluble organic matters, the colored soluble organic matters in the water body are excited to generate fluorescence with specific wavelength, and the fluorescence passes through the second sapphire window 5' and is detected and received by the photoelectric detector 4 after being screened by the optical filter 15. The photodetector 4 transmits the detection result to the control circuit 10, and the control circuit 10 calculates and stores the detection result. The control circuit 10 is electrically connected to the external structure through the watertight head 13 to achieve power supply and data transmission.
In the prior art, sealing is usually realized by adopting a form of matching a sealing ring with a pressing plate between the first sapphire window 5 and the end cover 2 and between the second sapphire window 5' and the end cover 2, so that the occupied space is large and the number of parts is large. The epoxy glue layer 14 is used for sealing, so that the pressure-bearing requirement of the 4000-meter depth level can be met, parts are fewer, and space is saved.
Specifically, the EPOXY glue layer 14 is preferably an H74 glue of the company EPOXY TECHNOLOGY. The gluing operation process is as follows: the epoxy glue is uniformly coated on the side walls and the positioning end faces (the outer edges of the positioning end faces are used for contacting the end cover 2) of the first sapphire window 5 and the second sapphire window 5', and then the positions, used for contacting the first sapphire window 5 and the second sapphire window 5', of the end cover 2 are uniformly coated with the epoxy glue. Then, the first sapphire window 5 is fitted into the outlet hole from the side facing away from the housing 1, the second sapphire window 5 'is fitted into the inlet hole from the side facing away from the housing 1, and a pressing force of about 10N is applied by a jig on the end faces of the first sapphire window 5, the second sapphire window 5' facing away from the housing 1. And then, cleaning the glue overflow by using tools such as cotton swabs, cotton cloth and the like. Finally, the end cap 2 and the clamp applying the pressing force are put into a baking oven at 150 ℃ together, and baked for 1 hour, so that the epoxy glue is completely cured.
As a possible example, in this embodiment, the CDOM deep sea sensor of ultraviolet fluorescence analysis further comprises a threaded disc 6, the threaded disc 6 being located between the end cap 2 and the control circuit 10. The thread disc 6 is provided with a wire through hole for passing the wire between the emitting light source 3 and the control circuit 10 and the wire between the photoelectric detector 4 and the control circuit 10. The inner wall of the shell 1 is in threaded connection with a threaded disc 6, and the threaded disc 6 is fixedly connected with the end cover 2 through a fastening screw 7 so as to realize indirect fixed connection between the end cover 2 and the shell 1.
The control circuit 10 can be installed in a variety of ways, and those skilled in the art can choose the way according to actual needs. As a possible example, in this embodiment, the screw disc 6 is fixedly connected to the control circuit 10.
Specifically, the control circuit 10 includes a plurality of circuit boards and a plurality of screws 9. The adjacent two circuit boards are separated by a first sleeve, and the threaded disc 6 is separated from the adjacent circuit boards by a second sleeve. The screw 9 passes through both the first sleeve and the second sleeve and is screwed with the threaded disc 6. The fixing mode can fix the circuit board on the thread disk 6, and also realize the interval arrangement of the circuit board and the thread disk 6 so as to avoid collision damage of the circuit board.
As a possible example, in this embodiment, a sealing ring 11 is disposed between the end cover 2 and the housing 1, and a groove matching the sealing ring 11 is disposed on the end cover 2. Specifically, the seal ring 11 is preferably an O-ring. The end cover 2 and the shell 1 are in sealing surface fit, and the tolerance level of the fit is preferably H8/f7.
As a possible example, in this embodiment, the axis of the end cap 2, the axis of the exit hole, and the axis of the entrance hole are coplanar, the axis of the end cap 2 and the axis of the exit hole form an angle of 32 °, and the axis of the end cap 2 and the axis of the entrance hole form an angle of 32 °.
Specifically, the incident angle of the light entering the sea through the first sapphire window 5 is θ 1 An emergence angle of theta 2 . The incident angle of the light ray entering the second sapphire window 5' from the seawater is theta 2 An emergence angle of theta 1 The steering angle of the light ray in the sea water is theta 0 . In order to ensure that the radiation of the excitation light source is reduced as much as possible when the light is injected into the sea waterMeasuring the effect of fluorescent signals requires that θ 0 Is approximately 90 deg..
Taking the vacuum refractive index of the seawater to be about 1.35, taking the vacuum refractive index of the sapphire to be about 1.8, the refractive index of the sapphire relative to the seawater is about n=1.35/1.8=0.75. As shown in fig. 5, let θ 0 =90°, θ 2 =45°, n=sinθ can be calculated in combination with the refractive index n 1 /sinθ 2 Calculated as theta 1 About 32 deg., i.e. the axis of the exit orifice is at an angle of 64 deg. to the axis of the entry orifice.
As a possible example, in this embodiment, the threaded disc 6 is provided with a positioning pin, and the end cover 2 is provided with a positioning hole, and the positioning pin is spliced with the positioning hole. Specifically, the locating pin is located at the center position of one side of the threaded disc 6 close to the end cover 2, and the locating hole is located at the center position of one side of the end cover 2 close to the threaded disc 6.
It should be noted that too smooth a surface is not advantageous to ensure adhesion of the epoxy glue layer 14. As a possible example, in this embodiment, the sides of the first sapphire window 5 and the second sapphire window 5' are frosted surfaces 17, and the frosted surfaces 17 are used for adhering the epoxy layer 14. It will be appreciated that both end surfaces of the first sapphire window 5 and both end surfaces of the second sapphire window 5' should be light-transmitting surfaces 16.
Specifically, the roughness value of the frosted surface 17 is preferably ra1.6. Correspondingly, the roughness value of the position on the end cap 2 for connecting the epoxy glue layer 14 is also Ra1.6. The edges of the positioning end faces of the first sapphire window 5 and the second sapphire window 5' are designed with chamfers of 0.5mm multiplied by 45 degrees, and the chamfers can store certain glue when gluing and bonding, so that the thickness of local glue storage is ensured, and the bonding strength is further improved.
As a possible example, in the present embodiment, the thickness of the epoxy layer 14 is 0.06mm to 0.09mm. The diameter of the first sapphire window 5 and the second sapphire window 5' is d 1 The diameter of the exit hole section corresponding to the first sapphire window 5 and the entrance hole section corresponding to the second sapphire window 5' is d 2 Then the following relation d is satisfied 2 =d 1 +2e, where e is the thickness of the epoxy glue layer 14.
As a possible example, in the present embodiment, the emission light source 3 is pressed and fixed in the exit hole by the first screw press ring, and the photodetector 4 is pressed and fixed in the entrance hole by the second screw press ring. In this embodiment, the first threaded press ring and the second threaded press ring have the same size, and are collectively referred to as a threaded press ring 12. The first sapphire window 5 is the same size as the second sapphire window 5', collectively referred to as a sapphire window. The first sleeve is the same size as the second sleeve and is collectively referred to as sleeve 8.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (10)
1. A CDOM deep sea sensor for ultraviolet fluorescence analysis, comprising:
a housing having an interior cavity;
the end cover is hermetically arranged at the first end of the shell, and is provided with an outlet hole and an incident hole;
the light emission assembly is arranged in the outlet hole and comprises a first sapphire window and an emission light source, and the emission light source is positioned on one side, close to the shell, of the first sapphire window;
the light receiving assembly is arranged in the incidence hole and comprises a second sapphire window, an optical filter and a photoelectric detector, the photoelectric detector is positioned on one side, close to the shell, of the second sapphire window, and the optical filter is positioned between the second sapphire window and the photoelectric detector;
the control circuit is arranged in the shell and is electrically connected with the emission light source and the photoelectric detector respectively;
the watertight head is hermetically arranged at the second end of the shell and is electrically connected with the control circuit;
the first sapphire window and the emergent hole, and the second sapphire window and the incident hole are connected through sealing and bonding of an epoxy adhesive layer.
2. The ultraviolet fluorescence analysis CDOM deep sea sensor of claim 1, further comprising a threaded disk located between the end cap and the control circuit; the thread disc is provided with a thread passing hole for passing a wire between the emission light source and the control circuit and a wire between the photoelectric detector and the control circuit; the inner wall of the shell is in threaded connection with the threaded disc, and the threaded disc is fixedly connected with the end cover.
3. The ultraviolet fluorescence analysis CDOM deep sea sensor of claim 2, wherein the threaded disc is fixedly connected to the control circuit.
4. The CDOM deep sea sensor of claim 3, wherein the control circuit comprises a plurality of circuit boards and a plurality of screws; the two adjacent circuit boards are separated by a first sleeve, and the thread disc is separated from the adjacent circuit boards by a second sleeve; the screw passes through the first sleeve and the second sleeve at the same time and is in threaded connection with the thread disc.
5. The CDOM deep sea sensor of claim 2, wherein a sealing ring is disposed between the end cap and the housing, and a groove matching the sealing ring is disposed on the end cap.
6. The CDOM deep sea sensor of claim 2, wherein the axis of the end cap, the axis of the exit aperture, and the axis of the entrance aperture are coplanar, wherein the axis of the end cap is at an angle of 32 ° to the axis of the exit aperture, and wherein the axis of the end cap is at an angle of 32 ° to the axis of the entrance aperture.
7. The CDOM deep sea sensor of claim 2, wherein the screw disc is provided with a positioning pin, the end cover is provided with a positioning hole, and the positioning pin is connected with the positioning hole in a plugging manner.
8. The CDOM deep sea sensor of claim 1, wherein the sides of the first and second sapphire windows are frosted surfaces for adhering the epoxy layer.
9. The CDOM deep sea sensor of claim 1, wherein the thickness of the epoxy glue layer is 0.06mm to 0.09mm.
10. The CDOM deep sea sensor of claim 1, wherein the emission light source is compressively secured within the exit aperture by a first threaded compression ring and the photodetector is compressively secured within the entrance aperture by a second threaded compression ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311174759.7A CN116930141A (en) | 2023-09-13 | 2023-09-13 | CDOM deep sea sensor by ultraviolet fluorescence analysis method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311174759.7A CN116930141A (en) | 2023-09-13 | 2023-09-13 | CDOM deep sea sensor by ultraviolet fluorescence analysis method |
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| CN116930141A true CN116930141A (en) | 2023-10-24 |
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| CN202311174759.7A Pending CN116930141A (en) | 2023-09-13 | 2023-09-13 | CDOM deep sea sensor by ultraviolet fluorescence analysis method |
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