River and lake trace fluorescent compound on-line monitoring device and monitoring method thereof

Abstract

The invention relates to the technical field of water quality monitoring, and discloses an online monitoring device and method for trace fluorescent compounds in rivers and lakes, and the online monitoring device comprises a detection floating platform, a telescopic bottom pile, water quality monitoring equipment and sampling equipment; the detection floating platform suspends on the water surface and is connected with the telescopic bottom pile through the connecting rope; the water quality monitoring equipment is arranged on the detection floating platform and is connected with the sampling equipment; the detection floating platform is also connected with an anti-drifting stabilizing assembly; a multi-point rigid supporting system is formed through a combined anchoring structure of the main piles and the side piles in combination with the multi-stage hydraulic telescopic columns. A winch mechanism is used for pre-judging water level change and tensioning a connecting rope, so that a connecting cylinder of the detection floating platform is automatically butted with a bottom pile matching groove, limiting connection when the water level drops suddenly is realized, and the floating platform is prevented from drifting or overturning; and the resistance area of the floating platform is increased through the anti-drifting stabilizing assembly and a rigid rod piece, high-frequency water flow impact energy is absorbed through inertia, the horizontal displacement amplitude of the floating platform is reduced, and sensor data acquisition errors are reduced.

Description

Technical Field

[0001] This invention relates to the field of water quality monitoring technology, and in particular to an online monitoring device and method for trace fluorescent compounds in rivers and lakes. Background Technology

[0002] Monitoring trace fluorescent compounds in water bodies is a core foundational technology for water environment management, and the quality of its data directly impacts the effectiveness of water resource allocation, pollution control, and ecological restoration decisions. Existing monitoring systems mostly employ fixed, single-point, in-situ detection methods, revealing two major technical bottlenecks: First, insufficient spatial monitoring dimensions. Traditional devices can only acquire local data from a single vertical line or cross-section, making it difficult to characterize the water quality gradient distribution across the river's cross-sections. Especially during peak flood seasons with strong turbulent flow, the lateral concentration difference can reach 200%-500% of the baseline value, significantly reducing the spatial representativeness of the monitoring results. Second, sensor reliability deteriorates. Under long-term immersion conditions, a composite sedimentary layer of biofilm and suspended matter easily forms on the sensor surface (thickness > 0.5 mm), causing measurement errors of key parameters such as turbidity and dissolved oxygen exceeding the tolerance by more than 15%. Furthermore, the frequency of manual cleaning and maintenance needs to be shortened to once every 7 days, greatly increasing operation and maintenance costs.

[0003] Current industry solutions generally suffer from adaptability deficiencies: 1. While floating monitoring platforms can expand the vertical monitoring range, their anchoring structures are prone to displacement and drift during rising water flows with velocities >3m / s, leading to inaccurate elevation control; 2. Automatic cleaning devices mostly employ mechanical scraping, which accelerates blade wear to three times the normal operating rate in water bodies with a sand content >10kg / m³, posing a risk of seal failure; 3. They cannot synchronously capture instantaneous correlation changes in water quality parameters. This is to avoid data interruption caused by sensor array exposure during sudden water level drops, and structural damage to the equipment due to sediment impact during rapid water level rises. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides an online monitoring device for trace fluorescent compounds in rivers and lakes; another objective of this invention is to provide a monitoring method for this online monitoring device for trace fluorescent compounds in rivers and lakes.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: An online monitoring device for trace fluorescent compounds in rivers and lakes includes a detection float, a telescopic base, water quality monitoring equipment, and sampling equipment. The detection float is suspended on the water surface and connected to the telescopic base via a connecting rope. The water quality monitoring equipment is mounted on the detection float and connected to the sampling equipment. The detection float is also connected to an anti-drift stabilizing component. Furthermore, the top of the telescopic base has a mating groove, and the bottom of the detection float has a connecting cylinder. The connecting rope passes through the connecting cylinder and connects to the mating groove, allowing the detection float to be detachably connected to the mating groove of the telescopic base via the connecting cylinder.

[0006] Preferably, when the river level is predicted to drop, the winch tightens the connecting rope, causing the testing platform to suspend above the bottom. When the river level drops, the connecting cylinder of the testing platform falls into the mating groove of the bottom pile, thus connecting the testing platform with the bottom pile.

[0007] Furthermore, the detection platform is also connected to a driving device; the edge of the detection platform is provided with a vertical guide rail, and the driving device is installed on the vertical guide rail and can slide along the height direction of the vertical guide rail.

[0008] Furthermore, the anti-drift stabilization component includes several stabilizing rods disposed at the bottom of the detection float to enhance the positioning stability of the detection float under water flow impact or drastic water level changes.

[0009] Preferably, the telescopic column (adopts a multi-stage hydraulic cylinder structure, includes at least three telescopic nested pipe sections, with a sealing anti-rotation groove between adjacent pipe sections, a maximum pipe diameter of 500-800mm, and a wall thickness of not less than 15mm).

[0010] Preferably, the stable base has an octagonal plate structure, made of Q345B steel plate, with stiffening ribs welded to its bottom in a cross pattern, and multiple sets of side piles passing through the stiffening ribs and symmetrically distributed radially around the main pile.

[0011] Furthermore, the anti-drift stabilization component also includes a gravity block, which is swayably positioned at the bottom of the stabilizing rod via a flexible rope to improve the anti-disturbance performance of the detection platform under fluid disturbance.

[0012] Preferably, the top of the telescopic column is provided with a mating groove for connecting bridge components, and its bottom is detachably connected to the stable base through a flange; the main pile is vertically welded to the bottom surface of the stable base and extends into the riverbed rock layer, and multiple sets of side piles are radially and symmetrically distributed around the main pile, with the bottom end embedded in the riverbed at an inclination angle of 30-45°.

[0013] Furthermore, the telescopic bottom pile also includes a telescopic column, a stable base, a main pile, and several sets of side piles; the top of the telescopic column is provided with a mating groove, and the bottom of the telescopic column is detachably connected to the stable base; the main pile is vertically set on the bottom surface of the stable base and extends into the riverbed rock layer; several sets of side piles are connected to the stable base and are radially and symmetrically distributed around the main pile. The bottom end of the side pile is embedded in the riverbed at an angle of 30-60°.

[0014] Furthermore, the sampling device includes a sampling tube, a moving frame, and a sampling component; the sampling tube is provided with a moving track, the moving frame is disposed inside the sampling tube and can slide along the moving track, and the sampling component is connected to the moving frame and can move with the moving frame.

[0015] Furthermore, the sampling inlet of the sampling component is detachably connected to a filter device; the sampling component is also connected to water quality monitoring equipment to transport the sampled water to the water quality monitoring equipment.

[0016] Furthermore, the water quality monitoring equipment includes: a sealed housing and sensors and detectors; the outer surface of the sealed housing is provided with an anti-collision buffer layer made of polyurethane elastomer, and the anti-collision buffer layer is also provided with a V-shaped flow guide groove.

[0017] Preferably, the water quality monitoring equipment includes: a sealed housing, a sensor, a detector, a data acquisition module, and a wireless transmission unit; the sealed housing is internally divided into a detection chamber and an electrical chamber, and the inner wall of the detection chamber is provided with an annular groove.

[0018] The signal output terminals of the sensors and detectors are connected to the input port of the data acquisition module through a waterproof electrical interface, and the output terminal of the data acquisition module is bidirectionally connected to the wireless transmission unit through an onboard communication interface. The antenna of the wireless transmission unit extends to the outside of the sealed housing and is integrated with the top of the housing through a waterproof potting structure.

[0019] The sealing housing is made of 316L stainless steel, and its outer surface is provided with an anti-collision buffer layer and a flow guide. The bottom is connected to the mating groove of the telescopic bottom pile through a quick-release flange. The sensors and detectors include a fluorescent compound detector, a pH probe, and a dissolved oxygen sensor.

[0020] A monitoring method using an online monitoring device for trace fluorescent compounds in rivers and lakes includes the following steps: S1: When it is predicted that the river water level will drop, the winch mechanism built into the telescopic bottom pile is activated to keep the detection floating platform suspended at the top by tightening the connecting rope; As the water level drops, the bottom of the testing platform moves downward along the connecting rope under the action of gravity, and finally embeds itself precisely into the top of the telescopic bottom pile, realizing the cooperation between the platform and the bottom pile; before the water level rises, the testing platform is kept in a limited connection with the telescopic bottom pile when the water level drops suddenly, to avoid the platform drifting or capsizing due to water level fluctuations. S2: When water quality monitoring is required, drive the sampling device to descend, drive the sampling device to contact the target water layer and perform filtration and collection, and transmit the collected water sample to the water quality monitoring equipment for multi-dimensional data analysis. S3: When high-frequency surges or drastic changes in water level are detected in the river channel, the anti-drift stabilization component is automatically activated. The bottom of the anti-drift stabilization component extends downward to increase the resistance area of ​​the detection float in contact with the water flow, and uses its inertia to counteract the impact of the lateral water flow. At the same time, the vertical gravity enhances the stability of the detection float. S4: When it is predicted that the river water level will remain unchanged for a period of time, the telescopic bottom piles are activated. The height is adjusted by hydraulic or electric drive so that the top of the telescopic bottom piles is always 0.5-8 meters below the current water level, ensuring that the connecting cylinder can quickly complete docking or separation and adapt to high-frequency water level changes.

[0021] Preferably, when the system predicts that the river level is about to drop, the winch mechanism built into the telescopic bottom pile is activated to keep the detection floating platform suspended at the top by tightening the connecting rope; As the water level drops, the connecting cylinder at the bottom of the testing platform moves downward along the connecting rope under the action of gravity, and finally precisely embeds into the mating groove at the top of the telescopic bottom pile, thus achieving mechanical locking between the platform and the bottom pile.

[0022] Preferably, when water quality monitoring is required, the drive device adjusts the depth of the sampling component along the vertical guide rail; the moving frame slides on the moving track inside the sampling tube, causing the inlet of the sampling component to contact the target water layer; during the sampling process, the filtration device intercepts impurities to ensure the purity of the collected water sample; Preferably, when high-frequency surges or drastic changes in water level are detected in the river channel, the anti-drift stabilization component is automatically activated. The stabilizing rods extend downward from the bottom of the detection platform, increasing the resistance area of ​​the platform in contact with the water flow. The gravity block swings freely through the flexible rope, using its inertia to offset the lateral water flow impact, while the vertical gravity enhances the stability of the platform. The synergistic effect of the stabilizing rods and the gravity block forms a "rigid + flexible" composite anti-disturbance structure, effectively suppressing the horizontal displacement and rotational offset of the platform.

[0023] Compared with the prior art, the beneficial effects of the technical solution of the present invention are: ① The composite anchoring design of the telescopic bottom piles significantly improves the stability of the floating platform. A multi-point rigid support system is formed by combining a main pile (vertically embedded in the riverbed rock strata) and side piles (radially inclined at 30-60°), along with multi-stage hydraulic telescopic columns (maximum pipe diameter 500-800mm, wall thickness ≥15mm). Compared to traditional single pile foundations, this design significantly enhances the pull-out resistance and overturning resistance of the bottom piles, making it particularly suitable for soft riverbeds or environments with frequent flooding.

[0024] ② The water level synchronization locking mechanism has high-frequency water level dynamic adaptability. By using a winch mechanism to predict water level changes and tighten the connecting ropes, the connecting cylinder of the detection float automatically aligns with the mating groove of the bottom pile, achieving a limiting connection when the water level drops suddenly, thus preventing the float from drifting or capsizing. Traditional floats rely on buoyancy for self-adaptation, which can easily lead to equipment dislocation due to sudden changes in water level.

[0025] ③ The accuracy of water quality sampling and analysis has been significantly improved. The drive unit adjusts the depth of the sampling component along the vertical guide rail, and in conjunction with the sliding of the mobile frame track, achieves precise sampling of the target water layer (such as the surface, middle layer, and bottom layer). Traditional fixed-depth sampling cannot cover representative water samples after water level changes; The filtration device at the sampling inlet intercepts impurities, and the V-shaped guide channel reduces the impact of water flow on the sensor, ensuring the purity of the water sample and the stability of the water flow on the detection surface, reducing the data error to within ±2%.

[0026] ④ Optimized anti-drift performance to cope with complex water flow disturbances The anti-drift stabilization component (stabilizing rods + gravity blocks) increases the drag area of ​​the floating platform through rigid rods, while the flexible gravity blocks swing to offset lateral impact forces, forming a dynamic balance. Compared to traditional passive stabilization solutions that rely solely on weight blocks, the resistance to lateral surges is improved by more than 50%. The gravity block also swings freely through a flexible rope, using inertia to absorb the impact energy of high-frequency water flow, reducing the horizontal displacement amplitude of the floating platform and minimizing sensor data acquisition errors. Attached Figure Description

[0027] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the first structure of a water quality monitoring device; Figure 2 This is a schematic diagram of the second structure of the water quality monitoring device; Figure 3 This is an enlarged diagram of A; Figure 4 This is a structural schematic diagram of the expansion joint pile; Figure 5 This is a schematic diagram of the water quality monitoring equipment; Figure 6 This is a schematic diagram of the sampling equipment; Figure 7 This is a schematic diagram of the structure of the moving frame and the sampling component working together.

[0029] The reference numerals in the attached figures are as follows: 1. Testing floating platform; 101. Connecting cylinder; 2. Expansion pile; 201. Gear groove; 202. Expansion column; 203. Stable base; 204. Main pile; 205. Side pile; 3. Water quality monitoring equipment; 4. Sampling equipment; 401. Sampling cylinder; 402. Moving frame; 403. Sampling components; 404. Filtering device; 5. Connect the ropes; 6. Drive equipment 7. Vertical guide rail; 8. Anti-drift stabilizing components; 801. Stabilizing rods; 802. Gravity blocks. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the described embodiments without creative effort are within the scope of protection of this application.

[0031] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] Example 1 like Figure 1-7 As shown, this embodiment discloses an online monitoring device for trace fluorescent compounds in rivers and lakes, including a detection floating platform 1, a telescopic base pile 2, a water quality monitoring device 3, and a sampling device 4; the detection floating platform 1 is suspended on the water surface and connected to the telescopic base pile 2 by a connecting rope 5; the water quality monitoring device 3 is set on the detection floating platform 1 and connected to the sampling device 4; the detection floating platform 1 is also connected to an anti-drift stabilizing component 8.

[0033] The top of the telescopic bottom pile 2 is provided with a mating groove 201, and the bottom of the detection floating platform 1 is provided with a connecting cylinder 101; the connecting rope 5 passes through the connecting cylinder 101 and connects to the mating groove 201, and the detection floating platform 1 is detachably connected to the mating groove 201 of the telescopic bottom pile 2 through the connecting cylinder 101.

[0034] The detection platform 1 is also connected to a drive device 6; the edge of the detection platform 1 is provided with a vertical guide rail 7, and the drive device 6 is installed on the vertical guide rail 7 and can slide along the height direction of the vertical guide rail 7.

[0035] At normal water levels, the main pile 204 of the telescopic bottom pile 2 is vertically embedded into the riverbed rock layer, and the side piles 205 are inserted into the riverbed at a radial angle of 30-45°, forming a stable anchoring system.

[0036] The testing platform 1 is suspended on the water surface by the connecting rope 5, and the stabilizing rod 801 of the anti-drift stabilizing component 8 remains in a retracted state; The drive device 6 slides along the vertical guide rail 7, driving the mobile frame 402 to move to the target water layer inside the sampling tube 401; the filter device 404 at the inlet of the sampling component 403 intercepts impurities, and the water sample is transported to the water quality monitoring device 3 through the pipeline.

[0037] When the water level drops suddenly, the winch mechanism of the telescopic bottom pile 2 tightens the connecting rope 5, causing the top of the detection floating platform 1 to suspend; during the water level drop, the connecting cylinder 101 moves down along the connecting rope 5 and embeds into the mating groove 201 of the telescopic bottom pile 2 to complete the rigid locking. The composite anchoring system of main pile 204 and side pile 205 resists the risk of subsidence caused by soft riverbed; the telescopic column 202 adopts a multi-stage hydraulic cylinder structure (pipe diameter 500-800mm) to ensure docking accuracy and tensile strength; the mechanical locking of the connecting cylinder and the mating groove prevents the floating platform from drifting and adapts to extreme working conditions where the water level drops suddenly by up to 5m / s; the radial distribution of the side piles increases the pull-out resistance of the bottom pile by 60%, making it suitable for silted riverbeds.

[0038] When the water level is in a high-frequency surge environment, upon detection of a high-frequency surge, the stabilizing rod 801 extends downwards from the bottom of the floating platform, increasing the platform's resistance area; the gravity block 802 swings freely via a flexible rope, using inertia to counteract the impact of lateral water flow (such as...). Figure 2 ); The stabilizing rod 801 suppresses horizontal displacement, while the gravity block 802 enhances vertical stability; the anti-drift component ensures that the maximum offset of the floating platform is ≤0.5m (compared to ≥1.2m in traditional solutions); the stability of the floating platform is improved, reducing data anomalies caused by sensor swaying.

[0039] This embodiment utilizes three core technologies—mechanical locking, multi-depth sampling, and rigid-flexible anti-interference—to adapt to the complex working conditions of high-frequency rising water in rivers, solving problems such as easy drifting, inaccurate sampling, and weak impact resistance of traditional devices. Its modular design (such as detachable telescopic base piles and quick-change filter devices) further reduces maintenance costs, making it suitable for various scenarios such as water conservancy monitoring, environmental protection inspections, and flood early warning.

[0040] As one embodiment, the anti-drift stabilization component 8 includes several stabilizing rods 801 disposed at the bottom 1 of the detection float, which are used to enhance the positioning stability of the detection float 1 under water flow impact or drastic water level changes. The telescopic base pile 2 also includes a telescopic column 202, a stabilizing base 203, a main pile 204, and several sets of side piles 205; the top of the telescopic column 202 is provided with a mating groove 201, and the bottom of the telescopic column 202 is detachably connected to the stabilizing base 203; the main pile 204 is vertically set on the bottom surface of the stabilizing base 203 and extends into the riverbed rock layer; several sets of side piles 205 are connected to the stabilizing base 203 and are radially and symmetrically distributed around the main pile 204; the bottom end of the side pile 205 is embedded into the riverbed at an inclination angle of 30-60°.

[0041] Specifically, the bottom of the testing platform is equipped with a connecting cylinder 101, which can be detachably connected to the matching groove 201 of the telescopic bottom pile 2 via the connecting rope 5; The edge is equipped with a vertical guide rail 7 and a drive device 6 for adjusting the sampling depth of the sampling device 4; it is equipped with an anti-drift stabilizing component 8, which includes several stabilizing rods 801 and a gravity block 802 suspended by a flexible rope.

[0042] The telescopic column 202 is a multi-stage hydraulic cylinder structure (pipe diameter 500-800mm, wall thickness ≥15mm), with a mating groove 201 at the top and a detachable connection between the bottom and the stable base 203 via a flange; the stable base 203 is made of a regular octagonal Q345B steel plate, with a cross stiffening rib welded to the bottom, the main pile 204 is vertically embedded in the riverbed rock layer, and the side piles (205) are radially distributed with an inclination angle of 30-60°.

[0043] When conducting multi-depth water quality monitoring at normal water levels, the main pile 204 is vertically embedded into the riverbed rock layer, and the side piles 205 are radially inserted into the riverbed at a 45° inclination angle to form an anti-pull-out anchoring system; the testing platform 1 is suspended on the water surface by the connecting rope 5, and the stabilizing rod 801 is in a retracted state, so that the platform is positioned and anchored.

[0044] The drive unit 6 moves the sampling component 403 along the vertical guide rail 7 to the target water layer (such as the surface, middle, or bottom layer); after the filtration device 404 intercepts impurities, the water sample is transported to the water quality monitoring device 3. The sensors inside the water quality monitoring device 3 detect the water quality parameters (pH, dissolved oxygen, etc.) at a 30° tilt angle. The vertical guide rail and the moving frame work together to cover representative data from the entire water layer, achieving precise stratified sampling.

[0045] When the water level drops suddenly, the floating platform is quickly locked. After the water level prediction system is triggered, the winch of the telescopic bottom pile 2 tightens the connecting rope 5, so that the top of the detection floating platform 1 is suspended. When the water level drops, the connecting cylinder 101 moves down along the connecting rope 5 and precisely embeds into the matching groove 201 of the telescopic bottom pile 2 to complete the rigid locking. The main pile 204 and the side pile 205 work together to resist the sinking force caused by the soft riverbed; the multi-stage hydraulic structure of the telescopic column 202 ensures locking accuracy, thereby preventing the floating platform from dislodging and adapting to sudden drops in water level.

[0046] In a high-frequency surge environment, upon detection of a high-frequency surge, the stabilizing rod 801 extends downwards into the water, increasing the drag area of ​​the floating platform; the gravity block 802 swings freely via a flexible rope, using inertia to counteract lateral impact forces (such as...). Figure 2 Thus, rigidity and flexibility work together to resist drift; The stabilizing rod 801 suppresses horizontal displacement, and the gravity block 802 enhances vertical stability; the maximum horizontal offset of the floating platform is increased.

[0047] Example 2 like Figure 1-7 As shown in one embodiment, the sampling device 4 includes a sampling cylinder 401, a moving frame 402, and a sampling component 403. The sampling cylinder 401 is provided with a moving track, the moving frame 402 is disposed within the sampling cylinder 401 and can slide along the moving track, and the sampling component 403 is connected to the moving frame 402 and can move with the moving frame 402. A filter device 404 is detachably connected to the sampling inlet of the sampling component 403. The sampling component 403 is also connected to a water quality monitoring device 3 to transport the sampled water to the water quality monitoring device 3. The water quality monitoring equipment 3 includes: a sealed housing and sensors and detectors; the outer surface of the sealed housing is provided with a shock-absorbing layer made of polyurethane elastomer, and the shock-absorbing layer is also provided with a V-shaped flow guide groove.

[0048] Specifically, the bottom is detachably connected to the groove 201 of the telescopic bottom pile 2 via the connecting cylinder 101; it is equipped with sampling equipment 4 and water quality monitoring equipment 3, and the edge is provided with vertical guide rail 7 and drive equipment 6; The sampling tube 401 has an internal moving track to support multi-depth sampling; the moving frame 402 slides along the sampling tube track, driving the sampling component 403 to move; a filter device 404 can be detachably installed at the inlet of the sampling component 403 and is connected to the water quality monitoring equipment 3 through a pipeline. The sealed housing is covered with a polyurethane anti-collision buffer layer, and the surface is provided with V-shaped flow guide grooves. When multi-depth dynamic sampling is required, the drive device 6 adjusts the moving frame 402 along the vertical guide rail 7 to the target water layer (such as the middle layer); The mobile frame 402 drives the sampling component 403 to slide along the track of the sampling cylinder 401, and the filter device 404 intercepts impurities and collects water samples. The sampled water is transported to the water quality monitoring equipment 3 through a pipeline; the water flows smoothly into the detection chamber through a V-shaped guide channel. The water quality monitoring equipment 3 is equipped with multiple sets of monitoring sensors. The detectors and sensors (fluorescent compound detector, pH probe, dissolved oxygen sensor) that are in direct contact with the water are directly set on the sampled water surface in the water quality monitoring equipment 3 to analyze the water quality data in real time and upload it to the monitoring platform through a wireless transmission module.

[0049] When the water level fluctuates frequently, the anti-drift stabilizing component 8 is activated, and the stabilizing rod 801 extends downward into the water; the gravity block 802 swings through the flexible rope to counteract the impact of the lateral water flow. The mobile frame 402 can still slide stably along the track in a fluctuating environment, and the filter device 404 prevents impurities from clogging it; the sensor group continues to work under the protection of the anti-collision buffer layer, reducing the data anomaly rate; the polyurethane buffer layer reduces the risk of damage from floating objects, thus extending the equipment life.

[0050] In extreme water flow conditions, when high-frequency surges cause the floating platform to shake violently, the drive device 6 quickly retrieves the sampling component 403 to avoid mechanical damage; the filter device 404 is removable and replaceable to prevent impurities from accumulating and affecting sampling efficiency. The sealed housing of the water quality monitoring device 3 is connected to the floating platform via a quick-release flange, supporting rapid disassembly and maintenance; the sensor group features a modular design, allowing individual faulty sensors to be replaced independently, thus shortening maintenance time.

[0051] Example 3 like Figure 1-7 As shown in the figure, this embodiment is a monitoring method for an online monitoring device for trace fluorescent compounds in rivers and lakes, including the following steps: S1: When it is predicted that the river water level will drop, the winch mechanism built into the telescopic bottom pile 2 is activated, and the top of the detection floating platform 1 is kept suspended by tightening the connecting rope 5. As the water level drops, the bottom of the detection platform 1 moves downward along the connecting rope 5 under the action of gravity, and finally accurately embeds itself into the top of the telescopic bottom pile 2, realizing the cooperation between the platform and the bottom pile; before the water level rises, the detection platform 1 is kept in a limited connection with the telescopic bottom pile 2 when the water level drops suddenly, to avoid the platform drifting or overturning due to water level fluctuations. S2: When water quality monitoring is required, drive the sampling device 4 to descend, drive the sampling device 4 to contact the target water layer and perform filtration and collection, and transmit the collected water sample to the water quality monitoring device 3 for multi-dimensional analysis (such as pH, turbidity, dissolved oxygen, etc.). S3: When high-frequency surges or drastic changes in water level are detected in the river channel, the anti-drift stabilization component 8 is automatically activated. The bottom of the anti-drift stabilization component 8 extends downward to increase the resistance area of ​​the detection float 1 in contact with the water flow, and uses its inertia to counteract the impact of the lateral water flow. At the same time, the vertical gravity enhances the stability of the detection float 1. S4: When it is predicted that the river water level will remain unchanged for a period of time, the telescopic bottom pile 2 is activated. The height is adjusted by hydraulic or electric drive so that the top of the telescopic bottom pile 2 is always 0.5-8 meters lower than the current water level, ensuring that the connecting cylinder 101 can quickly complete docking or separation to adapt to high-frequency water level changes.

[0052] Specifically, when water quality monitoring is required, the drive unit adjusts the depth of the sampling component along the vertical guide rail; the moving frame slides on the moving track inside the sampling tube, causing the inlet of the sampling component to contact the target water layer; during the sampling process, the filtration device intercepts impurities to ensure the purity of the collected water sample; When high-frequency surges or drastic changes in water level are detected in the river channel, the anti-drift stabilization component is automatically activated. The stabilizing rods extend downward from the bottom of the detection platform, increasing the resistance area of ​​the platform in contact with the water flow. The gravity block swings freely through the flexible rope, using its inertia to offset the impact of the lateral water flow, while the vertical gravity enhances the stability of the platform. The synergistic effect of the stabilizing rods and the gravity block forms a "rigid + flexible" composite anti-disturbance structure, effectively suppressing the horizontal displacement and rotational offset of the platform.

[0053] This embodiment achieves reliable monitoring of high-frequency rising waterways through the following innovative technologies: a winch mechanism and mechanical locking design ensure the stability of the floating platform when the water level drops sharply; the vertical guide rail and the moving frame are linked to achieve accurate data acquisition across the entire water layer; rigid-flexible anti-drift control: stabilizing rods and gravity blocks work together to suppress lateral impacts and improve anti-disturbance capabilities; and telescopic bottom piles dynamically adapt to water level changes, supporting unattended operation.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An online monitoring device for trace fluorescent compounds in rivers and lakes, characterized in that, The system includes a detection floating platform (1), a telescopic base pile (2), a water quality monitoring device (3), and a sampling device (4). The detection floating platform (1) is suspended on the water surface and connected to the telescopic base pile (2) via a connecting rope (5). The water quality monitoring device (3) is mounted on the detection floating platform (1) and connected to the sampling device (4). The detection floating platform (1) is also connected to an anti-drift stabilizing component (8). The top of the telescopic base pile (2) is provided with a mating groove (201), and the bottom of the detection floating platform (1) is provided with a connecting cylinder (101). The connecting rope (5) passes through the connecting cylinder (101) and connects to the mating groove (201). The detection floating platform (1) is detachably connected to the mating groove (201) of the telescopic base pile (2) via the connecting cylinder (101). The detection floating platform (1) is also connected to a driving device (6). The edge of the detection floating platform (1) is provided with a vertical guide rail (7). The driving device (6) is mounted on the vertical guide rail (7) and can slide along the height direction of the vertical guide rail (7).

2. The online monitoring device for trace fluorescent compounds in rivers and lakes according to claim 1, characterized in that, The anti-drift stabilization component (8) includes several stabilizing rods (801) set at the bottom (1) of the detection platform to enhance the positioning stability of the detection platform (1) under water flow impact or drastic water level changes.

3. The online monitoring device for trace fluorescent compounds in rivers and lakes according to claim 2, characterized in that, The anti-drift stabilizing component (8) also includes a gravity block (802), which is swayably set at the bottom of the stabilizing rod (801) by a flexible rope to improve the anti-disturbance performance of the detection platform (1) under fluid disturbance.

4. The online monitoring device for trace fluorescent compounds in rivers and lakes according to claim 1, characterized in that, The telescopic bottom pile (2) also includes a telescopic column (202), a stable base (203), a main pile (204), and several sets of side piles (205); the top of the telescopic column (202) is provided with a mating groove (201), and the bottom of the telescopic column (202) is detachably connected to the stable base (203); the main pile (204) is vertically set on the bottom surface of the stable base (203) and extends into the riverbed rock layer; several sets of side piles (205) are connected to the stable base (203) and are radially symmetrically distributed around the main pile (204); the bottom end of the side pile (205) is embedded into the riverbed at an inclination angle of 30-60°.

5. The online monitoring device for trace fluorescent compounds in rivers and lakes according to claim 1, characterized in that, The sampling device (4) includes a sampling tube (401), a moving frame (402), and a sampling component (403); the sampling tube (401) is provided with a moving track, the moving frame (402) is set inside the sampling tube (401) and can slide along the moving track, and the sampling component (403) is connected to the moving frame (402) and can move with the moving frame (402).

6. The online monitoring device for trace fluorescent compounds in rivers and lakes according to claim 5, characterized in that, The sampling inlet of the sampling component (403) is detachably connected to a filter device (404); the sampling component (403) is also connected to a water quality monitoring device (3) to transport the sampled water to the water quality monitoring device (3).

7. The online monitoring device for trace fluorescent compounds in rivers and lakes according to claim 1, characterized in that, The water quality monitoring equipment (3) includes: a sealed housing and a sensor and a detector; the outer surface of the sealed housing is provided with a shock-absorbing layer made of polyurethane elastomer, and the shock-absorbing layer is also provided with a V-shaped flow channel.

8. A monitoring method using the online monitoring device for trace fluorescent compounds in rivers and lakes according to any one of claims 1-7, characterized in that, Includes the following steps: S1: When it is predicted that the river water level will drop, the winch mechanism built into the telescopic bottom pile (2) is activated, and the detection floating platform (1) is kept suspended at the top by tightening the connecting rope (5); As the water level drops, the bottom of the detection platform (1) moves downward along the connecting rope (5) under the action of gravity, and finally accurately embeds itself into the top of the telescopic bottom pile (2), realizing the cooperation between the platform and the bottom pile; before the water level rises, the detection platform (1) is kept in a limited connection with the telescopic bottom pile (2) when the water level drops suddenly, so as to avoid the platform drifting or overturning due to water level fluctuations. S2: When water quality monitoring is required, drive the sampling device (4) to descend, drive the sampling device (4) to contact the target water layer and filter and collect the water sample, and transmit the collected water sample to the water quality monitoring device (3) for multi-dimensional data analysis; S3: When high-frequency surges or drastic changes in water level are detected in the river channel, the anti-drift stabilization component (8) is automatically activated. The bottom of the anti-drift stabilization component (8) extends downward to increase the resistance area of ​​the detection platform (1) in contact with the water flow, and uses its inertia to offset the impact of the lateral water flow. At the same time, the vertical gravity enhances the stability of the detection platform (1). S4: When it is predicted that the river water level will remain unchanged for a period of time, the telescopic bottom pile (2) is activated. The height is adjusted by hydraulic or electric drive so that the top of the telescopic bottom pile (2) is always 0.5-8 meters lower than the current water level, so that the connecting cylinder (101) can quickly complete docking or separation and adapt to high-frequency water level changes.

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