Ocean droplet droplet spectrometer

Abstract

The utility model relates to the technical field of drop spectrometers, in particular to an ocean droplet drop spectrometer. The interior of the ocean droplet spectrometer is divided into two layers, the upper layer is provided with an optical module (6), and the lower layer is provided with a power supply module (5); wherein the optical module (6) is sequentially provided with a three-dimensional adjusting platform (7), a laser (8), a window mirror fixing frame (9), a window mirror (10), a lens group (11), a beam splitter prism (12) and a photoelectric conversion circuit board (13). According to the utility model, a unique mechanical design is adopted, and the optical path module is integrally designed, so that the window mirror is convenient to replace while the sealing of equipment is ensured, and the equipment is convenient to maintain in a field environment.

Description

Technical Field

[0001] The utility model relates to the technical field of drop spectrometers, in particular to an ocean drop spectrometer. Background Art

[0002] The ocean droplet spectrometer is an optical particle counter that uses an open optical path and a red semiconductor laser as the light source. In the detection area, the ocean droplet particles extracted by the air pump pass through the light beam and scatter the laser radiation. The unscattered direct light beam is blocked and absorbed. The light scattered within the range of 4° to 12° is transmitted to the beam splitter prism by the imaging lens group. According to the Mie scattering theory, particles of different sizes have different scattering powers, so the power measured by the detector reflects the particle size. The corresponding power size is divided into 20 channels, and the particles in each channel are counted to obtain the spectral distribution of particles in different scale ranges.

[0003] The ocean droplet spectrometer is used in the marine environment. The equipment is operated in a high temperature, high humidity and high salt environment for a long time. The open airway is easy to be attached with sea salt, which affects the light intensity measurement. The temperature difference between day and night will aggravate the thermal expansion and contraction, resulting in unstable sealing of the equipment. The sea air enters the equipment and corrodes the circuit board, resulting in inaccurate data or equipment failure.

[0004] Therefore, there is an urgent need for a new type of ocean droplet spectrometer that can withstand the impact of the harsh marine environment and provide more accurate and reliable ocean droplet particle size distribution data. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects of the prior art and propose an ocean droplet spectrometer which can operate stably and measure accurately even in a harsh marine environment, and measures ocean droplet particles of 2μm-50μm by Mie scattering principle.

[0006] The utility model provides an ocean droplet spectrometer, which is divided into two layers, an optical module 6 is arranged on the upper layer, and a power module 5 is arranged on the lower layer; wherein,

[0007] The optical module 6 is provided with: a three-dimensional adjustment platform 7, a laser 8, a window mirror fixing frame 9, a window mirror 10, a lens group 11, a beam splitter prism 12 and a photoelectric conversion circuit board 13 in sequence.

[0008] Preferably, the ocean droplet spectrometer further comprises: an airway 1, a drying chamber 2, an inspection cover 3 and an FPGA 4.

[0009] The airway 1 is an open airway, which is used for the marine particles to pass through the sampling area under the action of the air pump;

[0010] The drying chamber 2 is used to store desiccant;

[0011] The inspection cover 3 is disassembled for maintenance;

[0012] The FPGA 4 is connected to the photoelectric conversion circuit board 13 and is used for collecting, processing and sending data.

[0013] Preferably, the laser 8 is fixed on the three-dimensional adjustment platform 7 to provide a collimated laser of 650-660 nm;

[0014] The three-dimensional adjustment platform 7 is used to adjust the incident angle of the laser;

[0015] Preferably, the window mirror fixing frame 9 is used to fix the window mirror 10;

[0016] A black spot is attached to the window mirror 10 on the side of the window mirror 10 close to the lens group 11, so as to block the unscattered direct light beam.

[0017] Preferably, the lens group 11 is used to adjust the forward scattered light when the particles pass through the light beam.

[0018] Preferably, the beam splitter prism 12 is used to send the adjusted forward scattered light intensity to the photoelectric conversion circuit board respectively.

[0019] Preferably, the photoelectric conversion circuit board 13 is provided with a signal detector and a reference signal detector for screening particles passing through the sampling area.

[0020] Preferably, the power module 5 is used to provide direct current.

[0021] Preferably, the optical module 6 is of a hollow integrated design as a whole.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] The utility model adopts a unique mechanical design and an integrated optical path module, which ensures the sealing of the equipment and facilitates the replacement of the window mirror, thereby facilitating the maintenance of the equipment in a field environment.

[0024] The integrated optical path module design of the utility model arranges the circuit and the optical path separately, thereby improving the earthquake and wind resistance of the device in the field, and is also arranged in layers with the circuit module to ensure the corrosion resistance of the lower circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional schematic diagram of the structure of the ocean droplet spectrometer of the utility model;

[0026] Figure 2 This is a schematic diagram of the optical path module of the ocean droplet spectrometer of the utility model;

[0027] Figure 3This is a schematic diagram of the detachable optical components of the ocean droplet spectrometer of the utility model;

[0028] Reference numerals:

[0029] 1. Air duct, 2. Drying chamber, 3. Inspection cover, 4. FPGA, 5. Power module, 6. Optical module, 7. Three-dimensional adjustment platform, 8. Laser, 9. Window mirror fixing frame, 10. Window mirror, 11. Lens group, 12. Beam splitter prism, 13. Photoelectric conversion circuit board. DETAILED DESCRIPTION

[0030] The technical solution of the utility model is described in detail below in conjunction with the embodiments and drawings.

[0031] The utility model provides an online detection ocean droplet spectrometer, such as Figure 2 As shown, it includes: airway 1, drying chamber 2, inspection cover 3, FPGA 4, power module 5, and optical module 6. The main core component is the optical module 6, which includes: three-dimensional adjustment platform 7, laser 8, window mirror fixing frame 9, window mirror 10, lens group 11, beam splitter prism 12, and photoelectric conversion circuit board 13. The power module 5 provides direct current for electrical equipment such as lasers and signal processing boards. The optical module 6 is an overall hollow integrated design to ensure the coaxial stability of the optical path, such as Figure 1 shown.

[0032] Wherein, the airway 1 is an open airway to ensure that the marine particles pass through the sampling area through the airway under the action of the vacuum pump. The drying chamber 2 can store bag desiccant to ensure that the inside of the device is dry. The inspection cover 3 can only be disassembled during maintenance, and the window mirror can be directly taken out for cleaning. The processing board of FPGA4 is used to collect, process and send data. The three-dimensional adjustment platform 7 is used to adjust the incident angle of the laser. The laser 8 is used to provide a collimated laser of 660nm. The window mirror fixing frame 9 is used to fix the window mirror 10. In order to ensure the internal sealing and later maintenance of the equipment, half of the fixing frame can be removed. The window mirror 10 is used to seal the device, and a black spot is attached to the window mirror on the side close to the lens group 11 to block the unscattered direct light beam. The lens group 11 is used to adjust the forward scattered light when the particle passes through the light beam. The beam splitter prism 12 sends the adjusted forward scattered light intensity to the photoelectric conversion circuit board behind. A signal detector and a reference signal detector are provided on the photoelectric conversion circuit board 13 to screen the particles passing through the sampling area. The photoelectric conversion circuit board 13 is connected to the FPGA 4 through a signal line. The photoelectric conversion circuit board is used to collect the forward scattered light of the particles and convert the optical signal into an electrical signal, wherein the signal is processed and then input into the FPGA processing board for comparison and other processing.

[0033] The ocean droplet spectrometer of the utility model is an optical particle counter using an open light path, and its working process is as follows:

[0034] The laser 8 is fixed on the three-dimensional adjustment platform 7. The three-dimensional adjustment platform 7 is adjusted so that a beam of collimated laser sent by the laser 8 can irradiate the black spot on the window mirror 10 near the side of the lens group 11. The black spot on the window mirror 10 is used to block the direct laser beam. Without particles, the optical lens cannot receive the laser. When marine particles are pumped by the vacuum pump through the airway 1 and pass through the sampling area, forward scattered light will be formed to bypass the black spot and enter the lens group 11. After being adjusted by the lens group 11, it is irradiated to the photoelectric conversion circuit board 13 through the dichroic prism 12. Different particle sizes correspond to different light intensities. After photoelectric conversion, the voltage measured by the signal detector reflects the particle size. The FPGA processing board processes the signal from the photoelectric conversion circuit board, divides the corresponding voltage into 20 channels, and counts the particles in each channel to obtain the spectral distribution of particles within different scale ranges. The FPGA processing board is also provided with a user interface, allowing the user to configure measurement parameters, view real-time data, or download stored measurement results through an external device (such as a computer or a control terminal). This interactive method not only provides flexibility for users, but also makes the operation of the device easier and more intuitive. Among them, the processing process of the FPGA processing board does not involve any improvement in the method and is a conventional technology in this field.

[0035] The utility model adopts a unique mechanical design, such as Figure 3 As shown, the optical path module is designed in an integrated manner to ensure optical coaxiality. It also improves the wind and earthquake resistance of the ocean droplet spectrometer in the field. In addition, the window mirror fixing frame on one side can be removed and the window mirror can be cleaned. Because the ocean droplet spectrometer works in the marine environment, the lens is easily attached to sea salt and is difficult to clean. It must be cleaned with a large amount of alcohol while being able to be observed.

[0036] The utility model adopts an integrated optical path module design, which can arrange the circuit and the optical path separately. The device is divided into two layers, and the circuit module is arranged in layers, ensuring the corrosion resistance of the lower circuit board.

[0037] Any content not described in detail in the present invention can be based on the conventional technical knowledge in the field.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the embodiments, a person skilled in the art should understand that any modification or equivalent replacement of the technical solution of the utility model does not deviate from the spirit and scope of the technical solution of the utility model, and should be included in the scope of the claims of the utility model.

Claims

1. An ocean droplet spectrometer, characterized in that: The ocean droplet spectrometer is divided into two layers, the upper layer is provided with an optical module (6), and the lower layer is provided with a power module (5); wherein, The optical module (6) is provided with: a three-dimensional adjustment platform (7), a laser (8), a window mirror fixing frame (9), a window mirror (10), a lens group (11), a beam splitter prism (12) and a photoelectric conversion circuit board (13) in sequence.

2. The ocean droplet spectrometer according to claim 1, characterized in that: The ocean droplet spectrometer further comprises: an airway (1), a drying chamber (2), an inspection cover (3) and an FPGA (4). The airway (1) is an open airway, which is used for the marine particles to pass through the sampling area under the action of the air pump; The drying chamber (2) is used to store desiccant; The inspection cover (3) is disassembled for maintenance; The FPGA (4) is connected to a photoelectric conversion circuit board (13) and is used for collecting, processing and sending data.

3. The ocean droplet spectrometer according to claim 1, characterized in that: The laser (8) is fixed on the three-dimensional adjustment platform (7) and is used to provide a collimated laser of 650-660 nm; The three-dimensional adjustment platform (7) is used to adjust the incident angle of the laser.

4. The ocean droplet spectrometer according to claim 1, characterized in that: The window mirror fixing frame (9) is used to fix the window mirror (10); A black spot is attached to the window mirror (10) on the side of the window mirror (10) close to the lens group (11), which is used to block the unscattered direct light beam.

5. The ocean droplet spectrometer according to claim 1, characterized in that: The lens group (11) is used to adjust the forward scattered light when particles pass through the light beam.

6. The ocean droplet spectrometer according to claim 1, characterized in that: The beam splitter prism (12) is used to send the adjusted forward scattered light intensity to the photoelectric conversion circuit board.

7. The ocean droplet spectrometer according to claim 1, characterized in that: The photoelectric conversion circuit board (13) is provided with a signal detector and a reference signal detector for screening particles passing through the sampling area.

8. The ocean droplet spectrometer according to claim 1, characterized in that: The power supply module (5) is used to provide direct current.

9. The ocean droplet spectrometer according to claim 1, characterized in that: The optical module (6) is of a hollow integrated design as a whole.

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