Phytoplankton detection device and detection method based on spectral technology

Abstract

This invention relates to the field of phytoplankton detection technology, and in particular provides a phytoplankton detection device and method based on spectroscopic technology. The phytoplankton detection device based on spectroscopic technology includes a focusing cover and a control lever. A detector connected to an external spectrometer is housed within the focusing cover. The top of the focusing cover is mounted on one end of the control lever via a bearing. The other end of the control lever extends horizontally to one side of the focusing cover and has an anchoring portion. A slot is formed on the end of the control lever where the bearing is mounted. Cavities communicating with the slot are formed on both sides of the control lever, and toothed belts are installed within the cavities. A control mechanism is provided on the end of the control lever with the anchoring portion. Multiple automatic detections can be completed within a single day. If there are many types of phytoplankton, multiple sets of data can be detected when used with a spectrometer, allowing for a more accurate assessment of water quality.

Description

Technical Field

[0001] This invention relates to the field of phytoplankton detection technology, and particularly to a phytoplankton detection device and method based on spectral technology. Background Technology

[0002] Phytoplankton spectroscopy is a technique that monitors the species, concentration, and physiological state of phytoplankton in water by analyzing their spectral characteristics. It is also used for pollution detection in lakes and rivers. Phytoplankton are a key component of aquatic ecosystems, and their spectral characteristics mainly depend on the pigments they contain (such as chlorophyll and carotenoids). These pigments have specific absorption and reflection characteristics for different wavelengths of light, and the water quality is determined based on the information fed back to the spectrometer.

[0003] Different phytoplankton, due to their varying concentrations, can affect the generation of spectral reflectance, thus impacting the accuracy of spectral detection. This is especially true for high-concentration phytoplankton growing below the water surface, such as algae, which are some distance from the surface. When light shines on them, the water surface refracts the light, affecting the spectral reflectance signal and consequently the accuracy of the detection. Summary of the Invention

[0004] To address the above problems, the present invention provides the following technical solution:

[0005] A phytoplankton detection device based on spectral technology includes a condenser and a control lever. The condenser houses a detector connected to an external spectrometer. The top of the condenser is mounted on one end of the control lever via a bearing. The other end of the control lever extends horizontally to one side of the condenser and has an anchoring portion. A slot is formed on the end of the control lever with the bearing. Cavities communicating with the slot are formed on both sides of the control lever. A toothed belt is installed within each cavity. A gear that enters the slot is mounted on the top of the condenser. A control mechanism is provided on the end of the control lever with the anchoring portion. The control mechanism includes a miniature electric cylinder mounted on one side of the control lever. One end of the toothed belt enters the slot, meshes with the gear, reaches the side of the cavity, and connects to the miniature electric cylinder. The other end of the toothed belt reaches the other side of the cavity and is elastically connected to the control lever. A spotlight is located above the condenser.

[0006] As a further preferred embodiment, a focusing lens is installed at the lower part of the interior of the light-collecting cover, and the detector faces downward and towards the focusing lens. The focusing lens focuses the light upward and concentrates the light onto the detector.

[0007] As a further preferred embodiment, the cavity is formed on both the front and rear surfaces of the control lever, with one end communicating with the slot. The cavity extends from one front end of the control lever to the same rear end, and communicates with the slot at the other end of the control lever. It has an arc-shaped surface that smoothly transitions with the slot. The miniature electric cylinder is located near the anchoring part. A temperature sensor electrically connected to the miniature electric cylinder is also installed on the detection device. One end of the toothed belt is connected to the miniature electric cylinder along the front side of the cavity, and the other end of the toothed belt is connected to the control lever along the rear side of the cavity with a spring. The toothed belt has a portion of toothed surfaces, and a portion of the toothed surfaces enter the slot and mesh with the gear.

[0008] As a further preferred embodiment, the control mechanism further includes a guide rod installed in the cavity, the guide rod being located on the front side and on the same side as the miniature electric cylinder, the guide rod being close to the slot, the guide rod having a forward-bent portion, the bent portion protruding forward from the cavity, the inner surface of the toothed belt passing through the bent portion and abutting against the bent portion and being tightened.

[0009] As a further preferred embodiment, a drive shaft is mounted on the top of the focusing cover, the gear is mounted on the drive shaft, a through hole is opened on the drive shaft, a signal line is provided in the through hole, the bottom end of the signal line is connected to the detector, and the top end extends outward to connect to an external spectrometer.

[0010] As a further preferred embodiment, the control lever is equipped with a hanging ring, the light-concentrating hood has four transparent sections in a circular array, the transparent sections are tilted downwards, and there are four spotlights. The four spotlights are mounted in a circular array on the hanging ring and provide light to the four transparent sections of the light-concentrating hood from four directions to improve the light-concentrating effect.

[0011] As a further preferred embodiment, a float is installed at the bottom of the focusing cover, and the control mechanism further includes a plurality of hinge seats arranged in a ring on the float. A retrieval rod is transferred to each of the hinge seats. One end of the retrieval rod is connected to the hinge seat through a collinear connection, and the other end of the collinear connection is connected upward to the control lever. When the toothed belt is actuated, the retrieval rod is dragged up and down to rotate through the collinear connection.

[0012] As a further preferred embodiment, the surface of the scooping rod is covered with a rubber layer, and the outside of the rubber layer is treated with a matte coating, and the scooping rod is slightly bent towards the axis of the light-concentrating cover.

[0013] This invention also provides a detection method for a phytoplankton detection device. The detection device is fixed to the downstream section by the anchoring part. The focusing hood is inverted on the water surface by the operating rod. The focusing hood is irradiated by the spotlight, so that the light is projected onto the phytoplankton. The toothed belt is controlled by the micro electric cylinder, which drives the gear to rotate. The gear drives the focusing hood to rotate, which drives the scooping rod to rotate. The scooping rod causes the phytoplankton to move circumferentially, thereby improving the detection rate.

[0014] The advantages of this invention compared to the prior art are:

[0015] 1. During use, the focusing hood extends to the water surface, while the scooping rod is inserted into the water. Since the operating environment is downstream, the types of phytoplankton entering the focusing hood's range are not fixed. In addition, the micro-electric cylinder operates intermittently when a certain set temperature is reached, controlled by a temperature sensor. Therefore, the focusing hood will rotate intermittently with the scooping rod, which is equivalent to completing a detection of a certain type of phytoplankton that has entered the detection range. According to the content displayed on the spectrometer, the detection data of that type of phytoplankton can be obtained, enabling detection and thus expanding the detection range. Multiple automatic detections can be completed within a day. If there are many types of phytoplankton, multiple sets of data can be detected when used with a spectrometer. Based on these data, the water quality can be more accurately determined.

[0016] 2. When the condenser rotates with the retrieval rods, in addition to providing better and more comprehensive detection of phytoplankton within its range, the rotation of the condenser with these retrieval rods utilizes the perforations to drag the collinearity, tightening it. The tightening effect produced by the collinearity drags all the retrieval rods, causing them to deflect around their respective hinge seats towards the axis. Utilizing the bending structure of these retrieval rods, the phytoplankton trapped within the condenser's range is temporarily locked, ensuring that the phytoplankton is effectively irradiated by the spotlight. After efficient irradiation, the phytoplankton reflects light upwards, which is then focused upwards by the focusing lens and falls onto the detector. The signal is then transmitted to the spectrometer via the signal line on the detector to complete the detection, thus improving the detection quality. Attached Figure Description

[0017] Figure 1 A schematic diagram of the front side of the phytoplankton detection device based on spectral technology provided for an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the phytoplankton detection device based on spectral technology provided in an embodiment of the present invention, viewed from below.

[0019] Figure 3 A schematic diagram of the phytoplankton detection device based on spectral technology provided in an embodiment of the present invention, viewed from the rear and with the control lever cut open.

[0020] Figure 4 The phytoplankton detection device based on spectral technology provided for embodiments of the present invention consists of... Figure 2 This is a schematic diagram from another perspective.

[0021] Figure 5 The phytoplankton detection device based on spectral technology provided for embodiments of the present invention consists of... Figure 4 This is a schematic diagram from another perspective.

[0022] Figure 6 The phytoplankton detection device based on spectral technology provided for embodiments of the present invention consists of... Figure 3 This leads to a schematic diagram from the front view;

[0023] Figure 7 The phytoplankton detection device based on spectral technology provided for embodiments of the present invention consists of... Figure 6 Enlarged schematic diagram of part A;

[0024] Figure 8 A flowchart of a phytoplankton detection device based on spectral technology provided for an embodiment of the present invention.

[0025] In the diagram: 1. Concentrator; 2. Drive shaft; 3. Control lever; 4. Bearing; 5. Groove; 6. Cavity; 7. Toothed belt; 8. Gear; 9. Anchoring part; 10. Miniature electric cylinder; 11. Detector; 12. Spotlight; 13. Focusing lens; 14. Curved surface; 15. Spring; 16. Partial toothed surface; 17. Guide rod; 18. Bending part; 19. Through hole; 20. Signal line; 21. Lifting ring; 22. Transparent part; 23. Float; 24. Hinge seat; 25. Retrieval rod; 26. Collinearity. Detailed Implementation

[0026] The above and other embodiments and advantages of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] In one implementation, such as Figures 1-8As shown: This embodiment provides a phytoplankton detection device based on spectral technology, including a condenser 1 and a joystick 3. The condenser 1 is equipped with a detector 11 connected to an external spectrometer. The top of the condenser 1 is mounted on one end of the joystick 3 via a bearing 4. The other end of the joystick 3 extends horizontally to one side of the condenser 1 and is provided with an anchoring part 9. A slot 5 is opened on the end of the joystick 3 where the bearing 4 is mounted. Cavities 6 communicating with the slots 5 are opened on both sides of the joystick 3. A toothed belt 7 is provided in the cavity 6. A gear 8 that enters the slot 5 is installed on the top of the condenser 1. A control mechanism is provided on the end of the joystick 3 where the anchoring part 9 is provided. The control mechanism includes a miniature electric cylinder 10 installed on one side of the joystick 3. One end of the toothed belt 7 enters the slot 5, meshes with the gear 8, reaches the side of the cavity 6, and is connected to the miniature electric cylinder 10. The other end of the toothed belt 7 reaches the other side of the cavity 6 and is elastically connected to the joystick 3. A spotlight 12 is provided above the condenser 1.

[0028] It should be further explained that a focusing lens 13 is installed at the lower part of the interior of the light-collecting cover 1, and the detector 11 faces downward and towards the focusing lens 13. The focusing lens 13 focuses the light upward and concentrates the light onto the detector 11.

[0029] It should be further explained that the cavity 6 is opened on both the front and rear surfaces of the control lever 3 and one end is connected to the slot 5. The cavity 6 is opened from one end of the front side of the control lever 3 to the same end of the rear side of the control lever 3, and the other end of the control lever 3 is connected to the slot 5. It is provided with an arc-shaped surface 14 that smoothly transitions with the slot 5. The miniature electric cylinder 10 is close to the anchor part 9. The detection device is also equipped with a temperature sensor that is electrically connected to the miniature electric cylinder 10. One end of the toothed belt 7 is connected to the miniature electric cylinder 10 along the front side of the cavity 6. The other end of the toothed belt 7 is connected to the control lever 3 along the rear side of the cavity 6 with a spring 15. The toothed belt 7 is provided with a portion of the tooth surface 16. The portion of the tooth surface 16 enters the slot 5 and meshes with the gear 8.

[0030] It should be further explained that the control mechanism also includes a guide rod 17 installed in the cavity 6. The guide rod 17 is located on the front side and on the same side as the miniature electric cylinder 10. The guide rod 17 is close to the slot 5. The guide rod 17 has a forward-bent bending part 18. The bending part 18 protrudes forward from the cavity 6. The inner surface of the toothed belt 7 passes through the bending part 18 and is pulled taut against the bending part 18.

[0031] It should be further explained that a drive shaft 2 is installed at the top of the condenser 1, and a gear 8 is installed on the drive shaft 2. A through hole 19 is opened on the drive shaft 2, and a signal line 20 is provided in the through hole 19. The bottom end of the signal line 20 is connected to the detector 11, and the top end extends outward to connect to an external spectrometer.

[0032] It should be further explained that a hanging ring 21 is installed on the control lever 3, and the focusing cover 1 has four transparent parts 22 arranged in a circular array. The transparent parts 22 are tilted downwards. There are four spotlights 12, which are arranged in a circular array on the hanging ring 21 and provide light to the four transparent parts 22 of the focusing cover 1 from four directions to improve the focusing effect.

[0033] It should be further explained that a float 23 is installed at the bottom of the focusing dome 1. The control mechanism also includes several hinge seats 24 arranged in a ring on the float 23. Each hinge seat 24 is connected to a scooping rod 25. One end of the scooping rod 25 is connected to the hinge seat 24 via a collinearity 26, and the other end of the collinearity 26 is connected upward to the control lever 3. When the toothed belt 7 is actuated, it drags the scooping rod 25 up and down to rotate via the collinearity 26. Figure 4 As shown, the upper end of the collinear line 26 passes through the focusing cover 1 and is connected upward to the control lever 3. The lower end of the collinear line 26 passes through the focusing cover 1 and is connected to each fishing rod 25 through multiple branch lines. When the focusing cover 1 rotates with these hinge seats 24, and these hinge seats 24 rotate with these fishing rods 25, the collinear line 26 will gradually tighten. The tightening effect of the collinear line 26 will drag all the fishing rods 25, causing them to deflect towards the axis (grabbing action). This is equivalent to grabbing the phytoplankton flowing into the focusing cover 1. As the grabbing speed of the fishing rods 25 increases, the phytoplankton that has been grabbed will not be easily washed away by the downstream water flow when it rotates, ensuring that the spotlight 12 can still illuminate the phytoplankton normally, thus ensuring that the light is reflected upward.

[0034] It should be further explained that the surface of the scooping rod 25 is covered with a rubber layer, and the outside of the rubber layer is treated with a matte coating. The scooping rod 25 is slightly bent towards the axis of the light-concentrating cover 1.

[0035] In use, select the downstream side and fix the anchor 9 to the downstream side. Use the control lever 3 to support the other end of the focusing hood 1 on the downstream water surface. The focusing hood 1 is inverted on the water surface and the float 23 is in contact with the water surface as a reference. The float 23 helps to maintain the balance of the focusing hood 1 and all the components on the focusing hood 1. During detection, the spectrometer emits light to the four spotlights 12. The light passes through the four transparent parts 22 and enters the focusing hood 1. After being collected and covered by the focusing hood 1, the light is projected onto the phytoplankton in the water. After being reflected by the phytoplankton, the light passes through the water surface and is reflected onto the focusing lens 13. After being focused by the focusing lens 13, the light is reflected onto the detector 11. The detector 11 receives the signal and transmits it to the spectrometer through the signal line 20 to complete the detection.

[0036] Due to temperature variations, this detection device can automatically complete multiple tests within a day to improve detection efficiency and quality. Specifically, the device is equipped with a temperature sensor, and the controller module within the spectrometer includes at least a temperature control module. The temperature sensor sends a signal to the spectrometer's temperature control module based on the daily temperature changes. The temperature control module then sends a command to the micro-cylinder 10 based on the set temperature. The actuator of the micro-cylinder 10 retracts, pulling the toothed belt 7 forward. The other end of the toothed belt 7 pulls the spring 15, causing the spring 15 to stretch elastically. The toothed belt 7 rotates clockwise by meshing with the gear 8, which in turn drives the transmission shaft 2 to rotate clockwise. The transmission shaft 2 then drives the focusing hood 1 to rotate clockwise, which in turn drives the float 23 to rotate clockwise. All the fishing rods 25 rotate, dragging the phytoplankton around in the water. The centrifugal force generated during rotation causes the phytoplankton to float to the surface over a large area, bringing them closer to the spotlight 12. The light emitted by the spotlight 12 is then blocked by the focusing cover 1, allowing it to get closer and better onto the phytoplankton, thus improving the reflectivity. The controller module in the spectrometer also includes a timer module. After the set time is reached, the controller controls the micro-cylinder 10 to extend its rod outward, the toothed belt 7 loosens, the spring 15 tightens, and the toothed belt 7 is pulled back in the opposite direction. The effective teeth on the toothed belt 7 drive the gear 8 to rotate counterclockwise. According to the above transmission relationship, the fishing rods 25 rotate in the opposite direction. The detection work within this temperature time is completed, and the phytoplankton is washed away by the water flow. When the next set temperature arrives for the day, the temperature control module sends another command to the micro electric cylinder 10 based on this set temperature. The actuator of the micro electric cylinder 10 retracts again, and the next type of phytoplankton enters the detection range of the focusing hood 1. Under the rotation of the scooping rod 25, the spectral detection is completed again.

[0037] In summary, during use, the focusing hood 1 extends towards the water surface while the scooping rod 25 is inserted into the water. Since the operating environment is downstream, the types of phytoplankton entering the range of the focusing hood 1 are not fixed. Furthermore, the micro-electric cylinder 10 operates intermittently when a set temperature is reached, controlled by a temperature sensor. Therefore, the focusing hood 1 rotates intermittently with the scooping rod 25, effectively detecting a specific type of phytoplankton within the detection range. Based on the spectrometer display, the detection data for that phytoplankton is obtained, enabling detection and expanding the detection range. Multiple automatic detections can be completed within a single day. If there are many types of phytoplankton, multiple sets of data can be detected simultaneously when used with a spectrometer, allowing for more accurate water quality testing.

[0038] In addition to the above, when the condenser 1 rotates with the scooping rods 25, it not only performs better and more comprehensive detection of phytoplankton within its range, but also uses the perforations (the condenser 1 has perforations for threading collinear 26) to pull the collinear 26 taut. The tautness effect of the collinear 26 pulls all the scooping rods 25, causing them to scoop up the condenser 1 around the hinge seat 24. The bending structure of these scooping rods 25 temporarily locks the phytoplankton caught within the range of the condenser 1 within the detection range below the condenser 1, ensuring that the phytoplankton is effectively irradiated by the spotlight 12. After being efficiently irradiated, the light reflected upwards by the phytoplankton is focused upwards by the focusing lens 13 and then irradiates the detector 11. The detector 11 transmits the detection signal to the spectrometer through the signal line 20 to complete the detection, thus improving the detection quality. After the spotlight 1 rotates in the opposite direction, in addition to stopping the irradiation detection, it also loosens the collinearity 26. The tension on these fishing rods 25 disappears, and these fishing rods 25 loosen, no longer scooping up phytoplankton. The phytoplankton loses its locking effect and is washed away by the water flow.

[0039] It should be further explained that at least half of the fishing rod should be used at a 25-point angle. Figure 1 The structures shown are connected by a net. The side with the net is downstream of the flowing water, and the side without the net is upstream. If fine or granular phytoplankton (without forming a large-scale algal bloom) enters the detection area (the water area corresponding to the area below the spotlight 1), it will be temporarily intercepted by the net. Even if impacted by the water flow, some will be intercepted on the net. When the scooping rod 25 scoops up the phytoplankton towards the axis of the spotlight 1, it will also move the net towards the axis. The net effectively locks the intercepted phytoplankton within the illumination range of the spotlight 12 and provides a reflective signal to the detector 11, thus slowing down the loss of phytoplankton and improving the detection quality.

[0040] The detection method of the phytoplankton detection device involves fixing the device to the downstream section via the anchoring part 9, for example, fixing or inserting the anchoring part 9 into the downstream bank. The focusing cover 1 is inverted on the water surface by the operating lever 3. When selecting the downstream location, a water area with abundant phytoplankton and slow current is chosen. The spotlight 12 is connected to the spectrometer via wiring and serves as the light source for the spectrometer. The light emitted by the spotlight 12 enters the focusing cover 1 and is concentrated on the water surface under the cover 1, illuminating the phytoplankton in the water. At the same time, the light is reflected upwards and enters the detector 11. The focusing cover 1 rotates, causing the scooping rod 25 to rotate as well. The scooping rod 25 causes the phytoplankton to move circumferentially, increasing the illumination and reflection area, thereby improving the detection rate.

[0041] The above orientation references do not represent the specific orientations of each component in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme and to make relative descriptions based on the orientations referenced. In reality, the specific orientations of each component are based on their actual installation and use, as well as the orientation descriptions that are customary to those skilled in the art. This is hereby stated.

[0042] The specific embodiments described above further illustrate the inventive purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A phytoplankton detection device based on spectral technology, characterized in that, The device includes a condenser (1) and a control lever (3). The condenser (1) contains a detector (11) connected to an external spectrometer. The condenser (1) has perforations. The top of the condenser (1) is mounted on one end of the control lever (3) via a bearing (4). The other end of the control lever (3) extends horizontally to one side of the condenser (1) and has an anchoring part (9). The end of the control lever (3) with the bearing (4) has a slot (5). Both sides of the control lever (3) have cavities (6) communicating with the slots (5). The cavities (6) contain toothed belts (7). The top of the condenser (1) A gear (8) is installed in the slot (5). The control lever (3) has an anchor part (9) at one end and a control mechanism is provided. The control mechanism includes a miniature electric cylinder (10) installed on one side of the control lever (3). One end of the toothed belt (7) enters the slot (5), meshes with the gear (8), reaches the side of the cavity (6), and is connected to the miniature electric cylinder (10). The other end of the toothed belt (7) reaches the other side of the cavity (6) and is elastically connected to the control lever (3). A spotlight (12) is provided above the focusing cover (1), and a scooping rod (25) is provided at the bottom of the focusing cover (1). The bottom of the focusing cover (1) is equipped with a float (23). The control mechanism also includes several hinge seats (24). Several hinge seats (24) are installed on the float (23) in a circular array. Each hinge seat (24) is connected to a scooping rod (25). One end of the scooping rod (25) connected to the hinge seat (24) is connected by a collinearity (26). The other end of the collinearity (26) is connected upward to the control lever (3). When the toothed belt (7) moves, it drags the scooping rod (25) up and down through the collinearity (26).

2. The phytoplankton detection device based on spectral technology according to claim 1, characterized in that, A focusing lens (13) is installed at the lower part of the inside of the light-collecting cover (1). The detector (11) faces downward and towards the focusing lens (13). The focusing lens (13) focuses the light upward and concentrates the light onto the detector (11).

3. The phytoplankton detection device based on spectral technology according to claim 2, characterized in that, The cavity (6) is opened on the front and rear sides of the control lever (3) and one end is connected to the slot (5). The cavity (6) is opened from the front end of the control lever (3) to the rear end of the control lever (3) and is connected to the slot (5) at the other end of the control lever (3). It is provided with an arc-shaped surface (14) that smoothly transitions with the slot (5). The miniature electric cylinder (10) is close to the anchor part (9). The detection device is also equipped with a temperature sensor that is electrically connected to the miniature electric cylinder (10). One end of the toothed belt (7) is connected to the miniature electric cylinder (10) along the front side of the cavity (6). The other end of the toothed belt (7) is connected to the control lever (3) along the rear side of the cavity (6) with a spring (15). The toothed belt (7) is provided with a portion of tooth surface (16). The portion of tooth surface (16) enters the slot (5) and meshes with the gear (8).

4. The phytoplankton detection device based on spectral technology according to claim 3, characterized in that, The control mechanism also includes a guide rod (17) installed in the cavity (6). The guide rod (17) is located on the front side and on the same side as the miniature electric cylinder (10). The guide rod (17) is close to the slot (5). The guide rod (17) has a forward-bent portion (18). The bent portion (18) protrudes forward from the cavity (6). The inner surface of the toothed belt (7) passes through the bent portion (18) and is pulled taut by abutting against the bent portion (18).

5. The phytoplankton detection device based on spectral technology according to claim 4, characterized in that, The top of the focusing cover (1) is equipped with a drive shaft (2), the gear (8) is mounted on the drive shaft (2), the drive shaft (2) has a through hole (19), the through hole (19) is provided with a signal line (20), the bottom end of the signal line (20) is connected to the detector (11), and the top end extends outward to connect to an external spectrometer.

6. The phytoplankton detection device based on spectral technology according to claim 5, characterized in that, The control lever (3) is equipped with a hanging ring (21). The light-concentrating cover (1) has four transparent parts (22) arranged in a circular array. The transparent parts (22) are tilted downward. There are four spotlights (12). The four spotlights (12) are arranged in a circular array on the hanging ring (21) and provide light to the four transparent parts (22) of the light-concentrating cover (1) from four directions to improve the light-concentrating effect.

7. The phytoplankton detection device based on spectral technology according to claim 6, characterized in that, The surface of the scooping rod (25) is covered with a rubber layer, and the outside of the rubber layer is treated with a matte coating. The scooping rod (25) is slightly bent toward the axis of the light-concentrating cover (1).

8. A detection method using the phytoplankton detection device based on spectral technology as described in claim 7, characterized in that, The detection device is fixed to the downstream section by the anchor (9). The control lever (3) inverts the focusing cover (1) on the water surface. The spotlight (12) illuminates the focusing cover (1), so that the light is projected onto the phytoplankton. The micro electric cylinder (10) controls the toothed belt (7), which drives the gear (8) to rotate. The gear (8) drives the focusing cover (1) to rotate. The focusing cover (1) drives the scooping rod (25) to rotate. The scooping rod (25) drives the phytoplankton to move circumferentially, improving the detection rate. When the focusing cover (1) rotates with the scooping rod (25), it will use the perforations to drag the collinear (26), making the collinear (26) collinear. The tensioning effect produced by the collinearity (26) pulls all the fishing rods (25) so that all the fishing rods (25) move around the hinge seat (24) towards the axis of the light-collecting cover (1). By utilizing the bending structure of these fishing rods (25), the phytoplankton caught in the range of the light-collecting cover (1) is temporarily locked in the detection range below the light-collecting cover (1) to ensure that the phytoplankton is effectively irradiated by the spotlight (12). After the phytoplankton is irradiated efficiently, the light reflected upward is focused upward by the focusing lens (13) and then irradiates the detector (11). The detector (11) transmits the detection signal to the spectrometer through the signal line (20) to complete the detection.

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