Phytoplankton identification device and method

Abstract

The invention relates to the technical field of water ecology research, and particularly discloses a phytoplankton identification device and a method thereof.The device comprises a main body, a buoy is arranged on the periphery of the main body, a solar module is arranged above the main body, and a stable swing part is movably connected to the bottom of the main body; a base is arranged in the main body, a sampling box is arranged above the base, an unwinding drum and a winding drum are arranged in the sampling box, and a filtering membrane is arranged between the unwinding drum and the winding drum; a light supplementing module is arranged at the top of the base and located at the bottom of the advancing path of the filtering membrane, an identification instrument is arranged at the position, located above the light supplementing module, of the sampling box, and the identification instrument can identify phytoplankton samples located on the filtering membrane above the light supplementing module. The problems that in the prior art, internal transmission systems of some identification devices are complex, consequently, energy consumption is high, faults are likely to occur, impurities are likely to remain when a filtering membrane is cleaned in a scraping mode, and the follow-up identification quality is affected are solved.

Description

Technical Field

[0001] This invention relates to the field of aquatic ecological research technology, specifically to a phytoplankton identification device and method. Background Technology

[0002] Phytoplankton generally refers to planktonic algae, including eight phyla: cyanobacteria, green algae, diatoms, chrysophytes, xanthophytes, dinoflagellates, cryptophytes, and euglena. Marine phytoplankton perform autotrophic functions, fixing carbon dioxide and water, providing matter and energy for the marine food chain. Phytoplankton are characterized by their diversity, large quantity, and rapid reproduction. Their diversity, ecological distribution, community structure, and succession are crucial for maintaining the structure and balance of ecosystems. Due to their small size, phytoplankton respond very rapidly to environmental changes and are one of the important indicators for monitoring eutrophication in water bodies.

[0003] A search revealed that patent application number CN202411014723.7 discloses a marine phytoplankton identification device and method, including a marine monitoring buoy equipped with a lifting mechanism. The buoy is connected to a disc via the lifting mechanism, enabling the identification of phytoplankton. During identification, phytoplankton can be extracted and filtered. Supplemental lighting can be provided during identification to improve efficiency. The identification process is conducted entirely in the ocean without the need for sampling. Identified phytoplankton can be removed to prevent interference with subsequent identifications, resulting in high efficiency. The removal process also allows for the extraction of phytoplankton adhering to the filter membrane, preventing incomplete removal. Furthermore, the device can identify a wide range of marine algae and can be repositioned as the buoy moves.

[0004] However, in this technical solution, because the filter membrane is set as a fixed structure, a complex transmission structure is required to perform the identification operation. This structure leads to high energy consumption and failure rate of the equipment. In addition, after identification, the phytoplankton on the filter membrane needs to be scraped off. In fact, this method is generally not very effective. Summary of the Invention

[0005] This invention provides a phytoplankton identification device and method, which helps to solve the problems of high energy consumption and easy failure caused by the complex internal transmission system of some existing identification devices, as well as the problem that the use of scraping to clean the filter membrane can easily leave impurities, affecting the quality of subsequent identification.

[0006] This invention is implemented as follows: The phytoplankton identification device includes a main body with a float surrounding it. Above the float, a solar module converting light energy into electrical energy is located on the main body. The bottom of the main body is below the float, and a stabilizing swing member for maintaining the device's attitude is movably connected to the center of the bottom. Inside the main body is a base, with the top of the stabilizing swing member connected to the base via a ball joint. A sampling box is located above the base, containing horizontally spaced unwinding and rewinding drums. A horizontally strip-shaped filter membrane is positioned between the unwinding and rewinding drums, and the filter membrane can be intermittently moved from the unwinding drum to the rewinding drum. The cylinder moves; a supplementary lighting module is located at the bottom of the filter membrane's travel path on the top of the base, and an identification instrument is located above the supplementary lighting module in the sampling box. The identification instrument can identify phytoplankton samples located on the filter membrane above the supplementary lighting module; a water collection tank is located on the side of the supplementary lighting module near the unwinding drum, and a spray pipe is located above the water collection tank, which is wound around the area above the filter membrane. The spray pipe is connected to a first water pump, and the water inlet of the first water pump is connected to the water area below through a hose and the internal channel of the stable swinging component. A second water pump is connected to the bottom of the water collection tank through a drainage pipe, and the second water pump is connected to the external area of ​​the main body.

[0007] Based on the above technical solution, the main body includes a base and a cylindrical body. The cylindrical body is detachably installed on top of the base. The top of the cylindrical body is a cone-shaped structure that is narrow at the top and wide at the bottom. The photovoltaic panels of the solar module are evenly distributed on the surface of the cone-shaped structure.

[0008] Based on the above technical solution, the float is a circular ring structure, and its radial inner end is detachably connected to the outer wall of the base.

[0009] Based on the above technical solution, the top of the stable swinging member is a ball head structure, the middle is a straight rod structure, and the bottom is a counterweight ball. The stable swinging member is provided with a water inlet channel. The water inlet of the water inlet channel is located at the bottom of the counterweight ball, and the water inlet of the water inlet channel is provided with a filter screen structure. The water outlet of the water inlet channel is located on the side wall of the straight rod near the top ball head structure, and is connected to the water inlet end of the first water pump through a hose.

[0010] Based on the above technical solution, motors are connected to one side of the unwinding drum and the take-up drum, and the two motors can rotate synchronously.

[0011] Based on the above technical solution, the spray pipe has an "n" shaped structure, and its top crossbar has several evenly distributed spray holes at the bottom. Each spray hole has a strip-shaped through-hole structure, and the length direction of the spray hole is perpendicular to the travel direction of the filter membrane.

[0012] Based on the above technical solution, the unwinding drum and the winding drum are respectively provided with openings of strip-shaped through-hole structure on adjacent sides, the openings are used for the filter membrane to enter and exit, and the unwinding drum and the winding drum are provided with rotating shafts for winding the filter membrane.

[0013] Based on the above technical solution, the bottom of the water inlet channel is provided with several water inlets.

[0014] A method for identifying phytoplankton, based on the above-mentioned phytoplankton identification device, includes the following steps: Step 1: Driven by the first water pump, the water mixed with phytoplankton is evenly sprayed onto the filter membrane above the water collection tank to achieve sampling and filtration, and obtain phytoplankton samples. Driven by the second water pump, the filtered water in the water collection tank is discharged. Step 2: The filter membrane moves in a step-by-step manner for the first time, transferring the area containing the phytoplankton sample to the top of the supplemental lighting module, and the identification instrument identifies the phytoplankton sample. Step 3: The filter membrane moves a second time to transfer the area containing the identified phytoplankton sample into the winding drum.

[0015] Compared with the prior art, the present invention has at least the following advantages: 1. This invention optimizes the device structure, eliminating the complex transmission structure of existing technologies. It uses a simple motor to drive the unwinding and rewinding drums to move the filter membrane, significantly reducing energy consumption. Simultaneously, the simplified structure reduces the requirements for component fit, lowers the probability of malfunctions, improves equipment reliability and stability, and reduces maintenance costs and repair difficulty.

[0016] 2. This invention employs a step-by-step moving filter membrane with automatic replacement, avoiding the problem of impurity residue caused by traditional scraping and cleaning of the filter membrane. Each assay uses a clean filter membrane, ensuring the accuracy and reliability of the assay results and improving the quality of the assay. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural diagram of a phytoplankton identification device; Figure 2 for Figure 1 Longitudinal sectional view; Figure 3 for Figure 1 A cross-sectional view at the height of the base; Figure 4 for Figure 3 Top view of the mid-sampling component; Figure 5 for Figure 4 Schematic diagram showing the positional relationship between the spray pipe and the filter membrane; Figure 6 for Figure 5 Schematic diagram of the structure of the central spray nozzle; Figure 7 for Figure 2 A three-dimensional structural diagram of the intermediate winding drum; Figure 8 for Figure 2 A magnified view of part A in the image.

[0019] The diagram is labeled as follows: 100, Main body; 110, Base; 120, Cylinder; 130, Solar module; 200, Float; 300, Base; 310, First water pump; 311, Hose; 312, Spray pipe; 313, Spray hole; 320, Second water pump; 321, Drain pipe; 400, Sampling box; 410, Unwinding drum; 411, Unwinding motor; 420, Rewinding drum; 421, Rewinding motor; 430, Mounting base; 431, Water collection tank; 432, Drainage channel; 440, Opening; 500, Filter membrane; 600, Supplemental lighting module; 700, Identification instrument; 800, Stabilizing swing component; 810, Water inlet channel; 900, Power module. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0021] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Combination Figures 1 to 8 This embodiment discloses a phytoplankton identification device and method, effectively solving the problems of high energy consumption and easy failure caused by the complex internal transmission system of some existing identification devices, as well as the problem that cleaning the filter membrane 500 by scraping can easily leave impurities and affect the quality of subsequent identification. By optimizing the device structure and working method, the reliability, stability and identification quality of the identification device are improved, while energy consumption and maintenance costs are reduced, providing a more efficient and accurate technical means for aquatic ecological research and water quality monitoring.

[0025] The phytoplankton identification device in this embodiment specifically includes a main body 100, which includes a base 110 and a cylindrical body 120 assembled by a threaded connection. A sealing ring is provided on the inner side of the connection between the two to ensure a waterproof and sealing effect. The cylindrical body 120 is detachably installed on top of the base 110. This detachable structure facilitates the assembly, maintenance, and component replacement of the device.

[0026] A float 200 is provided around the main body 100, providing buoyancy to the device and enabling it to float on the water surface. Specifically, the float 200 has a circular ring structure, with its radially inner end detachably connected to the outer wall of the base 110, achieved in this embodiment by clamping with a clamping ring. The circular ring structure of the float 200 provides stable buoyancy, keeping the device balanced on the water surface. The detachable connection allows for the replacement of different specifications of the float 200 according to different usage environments and needs, improving the adaptability of the device.

[0027] The main body 100, located above the float 200, houses a solar module 130 capable of converting solar energy into electrical energy. This module utilizes solar energy to power some components of the device, achieving energy self-sufficiency, reducing dependence on external power sources, and lowering operating costs. Specifically, the top of the cylinder 120 has a conical structure that is narrower at the top and wider at the bottom. The photovoltaic panels of the solar module 130 are evenly distributed on the surface of this conical structure. This design allows the photovoltaic panels to receive sunlight over a larger area, improving solar energy conversion efficiency and providing sufficient electrical energy for the device. Simultaneously, this conical structure not only improves water drainage during rainy weather, reducing water accumulation and minimizing residual stains after water evaporation that could affect light transmission, but also prevents seagulls and other birds from roosting there, all of which contribute to the long-term efficient operation of the photovoltaic panels. It should be noted that the solar module is existing technology; its specific structure and working principle will not be elaborated here. Those skilled in the art can select and implement it from existing technologies based on actual operating conditions.

[0028] The bottom of the main body 100 is located below the float 200. A stable swinging component 800 is movably connected at the center of the bottom of the main body 100 to maintain the attitude of the device, ensuring that the device maintains a relatively stable attitude on the water surface and reducing the swaying and tipping caused by factors such as water flow and waves.

[0029] like Figure 2 As shown, the main body 100 has a base 300 inside. The top of the stable swing member 800 is connected to the base 300 via a ball joint structure. This connection method allows the stable swing member 800 to swing freely in multiple directions to adapt to different water surface environments. Specifically, the stable swing member 800 has a ball joint structure at the top, a straight rod structure in the middle, and a counterweight ball at the bottom. The ball joint structure is connected to the base 300 via a ball joint structure to achieve multi-directional swinging. The counterweight ball increases the stability of the stable swing member 800, enabling it to better resist the effects of water flow and waves.

[0030] A sampling box 400 is mounted on top of the base 300, and a mounting base 430 is located at the bottom of the sampling box 400. The mounting base 430 is fixedly mounted on the top surface of the base 300. The sampling box 400 is the core component for phytoplankton sampling and identification. Inside the sampling box 400, on both sides of the mounting base 430, there are horizontally spaced unwinding drums 410 and rewinding drums 420. A horizontal strip-shaped filter membrane 500 is arranged between the unwinding drum 410 and the rewinding drum 420. The filter membrane 500 can be intermittently moved from the unwinding drum 410 to the rewinding drum 420 to achieve automatic replacement of the filter membrane 500, ensuring that a clean filter membrane 500 is used for each identification, and avoiding the influence of impurities on the identification results.

[0031] Combination Figure 3 , Figure 4 and Figure 7As shown, the unwinding drum 410 and the take-up drum 420 are horizontally arranged drum bodies 120. Figure 7 Taking the unwinding drum 410 as an example, it has pivot shafts at both ends along its axial direction. The pivot shafts are movably connected to the inner wall of the sampling box 400. A rotating shaft for winding the filter membrane 500 is connected inside the pivot shaft. A motor is driven to one end of the pivot shaft. An unwinding motor 411 is provided on one side of the unwinding drum 410, and a winding motor 421 is provided on one side of the winding drum 420. Both are stepper motors and can rotate synchronously in steps. The rotation of the pivot shaft and the rotating shaft controls the step-by-step movement of the filter membrane 500. When the filter membrane 500 moves, the drum bodies 120 of the unwinding drum 410 and the winding drum 420 are in a stationary state. The adjacent sides of the unwinding drum 410 and the winding drum 420 are respectively provided with slotted through holes 440 for the filter membrane 500 to enter and exit.

[0032] In other embodiments, a silicone sleeve may be provided at the opening 440 to improve the sealing effect inside and outside the cylinder 120; a sterilization lamp module may also be provided inside the winding drum 420 to sterilize the stored filter membrane 500 in a timely manner.

[0033] The base 300 is also equipped with a power module 900 and a controller on its top. The power module 900 serves as a power storage structure, using components such as inverters to store and transmit power. The controller is used to control the working status of each component. It should be noted that the power module 900 and the controller are both existing technologies, and their specific structures and working principles will not be described in detail here. Those skilled in the art can select and implement them from existing technologies according to actual operating conditions.

[0034] like Figure 2 and Figure 3 As shown, a supplementary lighting module 600 is located at the bottom of the travel path of the filter membrane 500 on the top of the base 300, providing sufficient light for the identification instrument 700 to ensure clear identification of phytoplankton samples under various lighting conditions. In this embodiment, the supplementary lighting module 600 uses an LED lamp panel with a top-mounted light-diffusing plate. The identification instrument 700 is located above the supplementary lighting module 600, and the sampling box 400 has an observation window at a corresponding position. The identification instrument 700 can identify phytoplankton samples located on the filter membrane 500 above the supplementary lighting module 600, accurately identifying the species and quantity of phytoplankton through image recognition, spectral analysis, and other technologies. It should be noted that this identification instrument 700 is existing technology, and its specific structure and working principle will not be described in detail here. Those skilled in the art can select and implement it from existing technologies according to actual operating conditions. Instruments that can be used include, but are not limited to, CytoBuoy, PHYTO-PAM-II, CytoSense, AquaPen, etc., and can be flexibly selected according to the actual operating environment and device specifications.

[0035] like Figure 2 As shown, the supplementary lighting module 600 has a water collection tank 431 near the unwinding drum 410. The water collection tank 431 is used to collect the filtered water. Above the water collection tank 431 is a spray pipe 312 wrapped around the area above the filter membrane 500. The spray pipe 312 is connected to a first water pump 310. The water inlet of the first water pump 310 is connected to the water area below through a hose 311 and the internal channel of the stable swing member 800. Figure 8 As shown, the first water pump 310 draws up water mixed with phytoplankton from the outside and sprays it evenly onto the filter membrane 500 above the water collection tank 431 through the spray pipe 312, achieving sampling filtration. A drainage channel 432 is provided at the bottom of the water collection tank 431. The water inlet of the second water pump 320 is connected to the drainage channel 432 through a pipe fitting. The water outlet of the second water pump 320 is connected to the external area of ​​the main body 100. The second water pump 320 discharges the filtered water accumulated in the water collection tank 431. The water outlet of the second water pump 320 extends through a pipe fitting into the gap between the outer wall of the base 110 and the float 200. This location is above the external water surface, which helps to prevent water backflow.

[0036] Furthermore, the stable swinging component 800 has a water inlet channel 810 inside. The water inlet of the water inlet channel 810 is located at the bottom of the counterweight ball, and the water inlet is equipped with a filter screen structure. The filter screen structure can filter out larger particulate impurities in the water, preventing them from entering the device and damaging the components. The water outlet of the water inlet channel 810 is located on the side wall of the straight rod near the top ball head structure, and is connected to the water inlet of the first water pump 310 through a hose 311 to realize water extraction. The bottom of the water inlet channel 810 has several water inlets to increase the water intake and improve sampling efficiency.

[0037] Furthermore, in combination Figure 5 and Figure 6 As shown, the spray pipe 312 has an "n"-shaped structure, with several evenly distributed spray holes 313 at the bottom of its top crossbar. Each spray hole 313 has a strip-shaped through-hole structure, and the length direction of the spray hole 313 is perpendicular to the travel direction of the filter membrane 500. This design allows the spray pipe 312 to spray water evenly onto the filter membrane 500, improving the sampling and filtration effect.

[0038] The assembled and debugged device is placed in the water. Float 200 keeps the device afloat, while stabilizing swing component 800 automatically adjusts the device's posture according to water flow and wave conditions to maintain stability. Solar module 130 then begins operation, converting solar energy into electrical energy to power the various components of the device.

[0039] During operation, the identification process includes sampling and filtering, sample identification, and sample processing.

[0040] First, driven by the first water pump 310, water containing phytoplankton is drawn up through the inlet channel 810 of the stable swing member 800, transported through the hose 311 to the spray pipe 312, and then evenly sprayed onto the filter membrane 500 above the water collection tank 431. The phytoplankton in the water is trapped by the filter membrane 500, achieving sampling filtration and obtaining a phytoplankton sample. Simultaneously, driven by the second water pump 320, the filtered water in the water collection tank 431 is discharged through the drain pipe 321, maintaining a stable water level in the water collection tank 431 and preparing for the next sampling filtration.

[0041] Next, the filter membrane 500 moves in a step-by-step motion. Driven by the motor, the unwinding drum 410 and the take-up drum 420 rotate synchronously, transferring the area of ​​the filter membrane 500 containing the phytoplankton sample directly above the supplemental lighting module 600. At this time, the supplemental lighting module 600 provides sufficient light for the identification instrument 700 to identify the phytoplankton sample. Through image recognition technology, the identification instrument 700 can analyze the morphological characteristics of the phytoplankton, such as cell shape, size, and color; through spectral analysis technology, it can obtain the spectral information of the phytoplankton to further determine its species and quantity.

[0042] Subsequently, the filter membrane 500 moves a second time, transferring the area containing the phytoplankton sample after identification to the winding drum 420. As the filter membrane 500 continues to move, a new, clean filter membrane 500 is placed at the sampling position, preparing for the next sampling and identification. This step-by-step movement and automatic filter membrane replacement method avoids the problem of residual impurities that is easily left behind by traditional scraping and cleaning methods, ensuring the accuracy and reliability of each identification.

[0043] Regularly maintain and inspect the device, replace the 500 filter membrane, clean the filter screen, etc., to ensure the normal operation of the device.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A phytoplankton identification device, characterized in that, The device includes a main body (100), a float (200) surrounding the main body (100), a solar module (130) above the float (200) that can convert light energy into electrical energy, a bottom of the main body (100) below the float (200), and a sturdy swinging member (800) connected movably at the center of the bottom of the main body (100) to maintain the attitude of the device; a base (300) is provided inside the main body (100) for sturdy swinging. The top of the component (800) is connected to the base (300) by a ball joint structure. A sampling box (400) is provided above the base (300). Inside the sampling box (400) are horizontally spaced unwinding drum (410) and winding drum (420). A horizontal strip-shaped filter membrane (500) is provided between the unwinding drum (410) and the winding drum (420). The filter membrane (500) can move intermittently from the unwinding drum (410) to the winding drum (420). A supplementary lighting module (600) is located at the bottom of the travel path of the filter membrane (500) on the top of the base (300). An identification instrument (700) is located above the supplementary lighting module (600) on the sampling box (400). The identification instrument (700) can identify phytoplankton samples located on the filter membrane (500) above the supplementary lighting module (600). A water collection tank (431) is located on the side of the supplementary lighting module (600) near the unwinding drum (410). 1) A spray pipe (312) is provided above the area above the filter membrane (500). The spray pipe (312) is connected to a first water pump (310). The water inlet of the first water pump (310) is connected to the water area below through the internal channel of the hose (311) and the stable swing member (800). The bottom of the water collection tank (431) is connected to a second water pump (320) through the drain pipe (321). The second water pump (320) is connected to the external area of ​​the main body (100).

2. The phytoplankton identification device according to claim 1, characterized in that, The main body (100) includes a base (110) and a cylindrical body (120). The cylindrical body (120) is detachably installed above the base (110). The top of the cylindrical body (120) is a cone-shaped structure that is narrow at the top and wide at the bottom. The photovoltaic panels of the solar module (130) are evenly distributed on the surface of the cone-shaped structure.

3. The phytoplankton identification device according to claim 2, characterized in that, The float (200) has a circular ring structure, and its radial inner end is detachably connected to the outer wall of the base (110).

4. The phytoplankton identification device according to claim 1, characterized in that, The stable swing member (800) has a ball head structure at the top, a straight rod structure in the middle, and a counterweight ball at the bottom. The stable swing member (800) is provided with a water inlet channel (810). The water inlet of the water inlet channel (810) is located at the bottom of the counterweight ball, and the water inlet of the water inlet channel (810) is provided with a filter screen structure. The water outlet of the water inlet channel (810) is located on the side wall of the straight rod near the top ball head structure, and is connected to the water inlet end of the first water pump (310) through a hose (311).

5. The phytoplankton identification device according to claim 1, characterized in that, The unwinding drum (410) and the winding drum (420) are each connected to a motor on one side, and the two motors can rotate synchronously.

6. The phytoplankton identification device according to claim 1, characterized in that, The spray pipe (312) has an "n" shaped structure, and its top crossbar has several evenly distributed spray holes (313) at the bottom. Each spray hole (313) has a strip-shaped through hole structure, and the length direction of the spray hole (313) is perpendicular to the travel direction of the filter membrane (500).

7. The phytoplankton identification device according to claim 1, characterized in that, The unwinding drum (410) and the winding drum (420) are respectively provided with openings (440) of strip-shaped through-hole structure on adjacent sides. The openings (440) are used for the filter membrane (500) to enter and exit. The unwinding drum (410) and the winding drum (420) are provided with rotating shafts for winding the filter membrane (500).

8. The phytoplankton identification device according to claim 4, characterized in that, The bottom of the water inlet channel (810) is provided with several water inlets.

9. A method for identifying phytoplankton, characterized in that, Based on the phytoplankton identification device according to claims 1-8, the steps include: Step 1: Driven by the first water pump (310), the water mixed with phytoplankton is evenly sprayed onto the filter membrane (500) above the water collection tank (431) to achieve sampling and filtration, and obtain phytoplankton samples. Driven by the second water pump (320), the filtered water in the water collection tank (431) is discharged. Step 2: The filter membrane (500) moves in a step-by-step manner for the first time, transferring the area containing the phytoplankton sample to directly above the supplementary lighting module (600), and the identification instrument (700) identifies the phytoplankton sample; Step 3: The filter membrane (500) moves in a second step to transfer the area containing the identified phytoplankton sample into the winding tube (420).

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