Optomechanical structure of end window type water algae excitation fluorescence spectrum in-situ sensor

Abstract

The utility model provides an end window type water algae excitation fluorescence spectrum in-situ sensor optical-mechanical structure. The optical-mechanical structure comprises a receiving end sapphire optical window, an excitation end sapphire optical window, a radial sealing ring, a titanium alloy base, an axial sealing ring, a gland plate, a photomultiplier, an optical filter and an LED lamp bead. The portable underwater robot has the characteristics of miniaturization, portability and high pressure resistance, can be carried on mobile platforms such as an Argo and an underwater glider, and has the working depth of 5000 meters underwater.

Description

Technical Field

[0001] The utility model relates to the technical field of water body algae excitation fluorescence spectrum detection accessories, in particular to an end window type water body algae excitation fluorescence spectrum in-situ sensor optical-mechanical structure. Background Art

[0002] Phytoplankton is vital to the marine ecosystem and reflects the health of the ecological environment. Chlorophyll content and community structure are key indicators and are highly valued in international marine research programs. The chlorophyll concentration in my country's waters is generally between 0.05 and 12 μg / L, and traditional detection methods cannot meet the needs of real-time monitoring. The in vivo chlorophyll fluorescence method can measure quickly and sensitively without tedious pre-processing, and has become the core technology of the international marine chlorophyll in-situ sensor.

[0003] With the development of optoelectronic technology, the chlorophyll detection limit of single-point fluorescence sensors (Seabird SeaOWL, TriosnannoFlu, etc.) at home and abroad has reached 0.005ug / L, and detection sensitivity is no longer the bottleneck of the application of this technology in the marine field. At present, chlorophyll monitoring equipment in the domestic market still faces the problems of large size, high power consumption and low sensitivity, which makes it difficult to meet the needs of in-situ monitoring of marine chlorophyll on mobile platforms such as Argo and underwater gliders. Utility Model Content

[0004] Based on this, the technical solution of the utility model is an end-window type water algae excitation fluorescence spectrum in-situ sensor optical-mechanical structure, the optical-mechanical structure includes a receiving end sapphire light window, an excitation end sapphire light window, a radial sealing ring, a titanium alloy base, an axial sealing ring, a gland plate, a photomultiplier tube, a filter, and an LED lamp bead;

[0005] The titanium alloy base is placed at the bottom, the sapphire light window at the receiving end is installed in the inner groove of the titanium alloy base, the sapphire light window at the receiving end is adhesively connected to the inner groove of the titanium alloy base, the radial sealing ring and the axial sealing ring are respectively placed in the radial notch and axial notch of the titanium alloy base; the pressure cover plate is connected to the detection end face of the photomultiplier tube through a threaded connection, the filter is concentrically assembled with the pressure cover plate and the titanium alloy base, and the pressure cover plate is fixed to the titanium alloy base through a threaded connection; 11 LED lamp beads are obliquely inserted into the titanium alloy base.

[0006] Furthermore, the gap between the sapphire light window at the receiving end and the inner groove of the titanium alloy base is designed to be between 0.05mm and 0.1mm; a glue overflow groove is designed at the bottom of the inner groove of the titanium alloy base to prevent glue from overflowing onto the sapphire end face during assembly, and the contact step between the inner groove of the titanium alloy base and the sapphire light window at the receiving end is 1mm on one side to ensure the pressure-bearing contact area.

[0007] Furthermore, the inner groove of the sapphire light window at the excitation end is evenly coated with glue and assembled concentrically with the inner column of the titanium alloy base.

[0008] Furthermore, the connection portion between the cylindrical end and the curved end of the sapphire light window at the excitation end is rounded to ensure that the radial sealing ring will not be sheared during the pressing process of the sapphire light window at the excitation end.

[0009] The utility model has the following beneficial technical effects:

[0010] The structure is small, portable and highly pressure-resistant. It can be carried on mobile platforms such as Argo and underwater gliders, and can operate at a depth of 5,000 meters underwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Cross-sectional view of the end-window water algae excitation fluorescence spectroscopy in-situ sensor;

[0012] Figure 2 End-window type water algae excitation fluorescence spectroscopy in-situ sensor;

[0013] Figure 3 Titanium alloy base;

[0014] Figure 4 Pressure simulation of end-window in-situ sensor for algae excitation fluorescence spectrum in water.

[0015] Among them: 1. Sapphire light window at the receiving end; 2. Sapphire light window at the exciting end; 3. Radial sealing ring; 4. Titanium alloy base; 5. Axial sealing ring; 6. Cover plate; 7. Photomultiplier tube; 8. Filter; 9. LED lamp beads. DETAILED DESCRIPTION

[0016] The utility model designs an end-window type water body algae excitation fluorescence spectrum in-situ sensor optical-mechanical structure, comprising a receiving end sapphire light window 1; an excitation end sapphire light window 2; a radial sealing ring 3; a titanium alloy base 4; an axial sealing ring 5; a pressure cover plate 6; a photomultiplier tube 7; a filter 8; and an LED lamp bead 9.

[0017] like Figure 1-3 As shown, the titanium alloy base 4 is placed at the bottom, the receiving end sapphire light window 1 and the inner groove of the titanium alloy base 4 are designed in a conical shape, with a conical angle of 3°. The receiving end sapphire light window 1 and the inner groove of the titanium alloy base 4 are glued together. In order to ensure that the glue bonding performance reaches the maximum and meet the working requirements of 5000 meters in the deep sea, the gap between the receiving end sapphire light window 1 and the inner groove of the titanium alloy base 4 is designed to be between 0.05mm-0.1mm. The bottom of the inner groove of the titanium alloy base 4 is designed with an overflow groove to prevent glue from overflowing onto the sapphire end face during assembly. The inner groove of the titanium alloy base 4 and the receiving end sapphire light window 1 contact the step of 1mm on one side to ensure the pressure-bearing contact area.

[0018] The radial sealing ring 3 and the axial sealing ring 5 are placed in the radial notch and the axial notch of the titanium alloy base 4 respectively. The inner groove of the sapphire light window 2 at the excitation end is evenly coated with glue and assembled concentrically with the inner column of the titanium alloy base 4 (the clearance is designed to be between 0.05mm-0.1mm). During the assembly process, a handheld hydraulic device is used to squeeze the outer end window of the sapphire light window 2 at the excitation end. After the outer end window of the sapphire light window 2 at the excitation end is flush with the end face of the titanium alloy base 4, the pressure is maintained, and after the glue is cured, it is taken out to complete the assembly. The connection part of the cylindrical end and the curved end of the sapphire light window 2 at the excitation end is rounded to ensure that the radial sealing ring 3 will not be sheared during the pressing process of the sapphire light window 2 at the excitation end.

[0019] The gland plate 6 is connected to the detection end face of the photomultiplier tube 7 by threads, the filter 8 is assembled concentrically with the gland plate 6 and the titanium alloy base 4, and the gland plate 6 is fixed on the titanium alloy base 4 by threads. 11 LED lamp beads 9 are obliquely inserted into the titanium alloy base 4.

[0020] The designed end-window water algae excitation fluorescence spectrum in-situ sensor was simulated at 50Mpa pressure, and the results are as follows: Figure 4 The simulation results show that the maximum deformation is only 0.0481 mm, which meets the design requirements and can meet the working requirements of 5000m deep sea.

[0021] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An end-window type water algae excitation fluorescence spectrum in-situ sensor optical-mechanical structure, characterized in that: The optical-mechanical structure includes a sapphire light window at the receiving end, a sapphire light window at the excitation end, a radial sealing ring, a titanium alloy base, an axial sealing ring, a gland plate, a photomultiplier tube, a filter, and an LED lamp bead; The titanium alloy base is placed at the bottom, the sapphire light window at the receiving end is installed in the inner groove of the titanium alloy base, the sapphire light window at the receiving end is adhesively connected to the inner groove of the titanium alloy base, the radial sealing ring and the axial sealing ring are respectively placed in the radial notch and axial notch of the titanium alloy base; the pressure cover plate is connected to the detection end face of the photomultiplier tube through a threaded connection, the filter is concentrically assembled with the pressure cover plate and the titanium alloy base, and the pressure cover plate is fixed to the titanium alloy base through a threaded connection; 11 LED lamp beads are obliquely inserted into the titanium alloy base.

2. The optomechanical structure according to claim 1, characterized in that: The gap between the sapphire optical window at the receiving end and the inner groove of the titanium alloy base is designed to be between 0.05mm and 0.1mm. A glue overflow groove is designed at the bottom of the inner groove of the titanium alloy base to prevent glue from overflowing onto the sapphire end face during assembly. The contact step between the inner groove of the titanium alloy base and the sapphire optical window at the receiving end is 1mm on one side to ensure the pressure-bearing contact area.

3. The optomechanical structure according to claim 1, wherein: The inner groove of the sapphire light window at the excitation end is evenly coated with glue and assembled concentrically with the inner column of the titanium alloy base.

4. The optomechanical structure according to claim 1, wherein: The connection part between the cylindrical end and the curved end of the sapphire light window at the excitation end is rounded to ensure that the radial sealing ring will not be sheared during the pressing process of the sapphire light window at the excitation end.

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