Water sampling device

Abstract

The invention relates to the technical field of water sampling equipment, in particular to a water sampling device.The water sampling device comprises a fixing frame, a lifting mechanism, a water sampler, a depth sensor and a controller, the lifting mechanism is arranged on the fixing frame, and the lifting mechanism is provided with a liftable traction end; the water sampler is mounted at the traction end and comprises a barrel and a sealing assembly, the barrel is provided with a cavity and a water sampling port communicated with the cavity, and the sealing assembly is arranged at the water sampling port and used for controlling opening and closing of the water sampling port; the depth sensor is arranged on the water sampler and is used for collecting the water depth of the water sampler; according to the water sampling device provided by the invention, the water sampling depth can be accurately controlled, water sample pollution is effectively prevented, and the water sampling efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of water sampling equipment technology, and more particularly to a water sampling device. Background Technology

[0002] With increasing environmental awareness and growing demand for water quality monitoring, water sampling, as a crucial preliminary step in water quality analysis, directly impacts the accuracy and reliability of monitoring results through its precision and efficiency. In monitoring different water bodies such as lakes, reservoirs, and rivers, it is often necessary to collect water samples at specific depths for analysis to obtain information on the water quality at different water layers.

[0003] Current water sampling equipment generally suffers from the following technical problems: First, insufficient depth control accuracy. Existing water samplers mainly estimate sampling depth based on rope length. However, the rope can bend and deform in the water, and the sampler itself may also tilt, causing the actual depth of the sampler to be less than the rope length. This results in the true sampling depth deviating from the target depth, severely affecting sampling accuracy. This error is further amplified in deep water environments, failing to meet the needs of accurate water quality monitoring. Second, significant water sample contamination. During the raising and lowering process of traditional water samplers, the sampling port is either open or not properly sealed, easily allowing water samples from different depths to mix into the sampler, causing cross-contamination. This contamination not only affects the representativeness of the water samples but also leads to distorted monitoring data, failing to accurately reflect the true water quality at the target depth. Third, low operational efficiency. Most existing water samplers rely on manual operation, requiring operators to judge the lowering depth based on experience, manually control the opening timing, and manually operate the raising and lowering device. This not only consumes a lot of manpower but also results in low operational efficiency, making it difficult to meet the needs of large-scale water quality monitoring. Summary of the Invention

[0004] This invention provides a water sampling device that can precisely control the water sampling depth, effectively prevent water sample contamination, and improve water sampling efficiency.

[0005] This invention provides a water sampling device, comprising: a fixed frame; a lifting mechanism disposed on the fixed frame, the lifting mechanism having a liftable traction end; a water sampler installed on the traction end, the water sampler including a cylinder and a sealing assembly, the cylinder having a cavity and a water sampling port communicating with the cavity, the sealing assembly disposed at the water sampling port for controlling the opening and closing of the water sampling port; a depth sensor disposed on the water sampler for collecting the water depth at the location of the water sampler; and a controller electrically connected to the lifting mechanism, the sealing assembly, and the depth sensor.

[0006] In one possible implementation, the sealing assembly includes: a movable cover plate rotatably mounted on the cylinder, the movable cover plate having a first state of sealing the water inlet and a second state of opening the water inlet; and an electromagnetic latch disposed between the movable cover plate and the cylinder for locking the movable cover plate in the first state; wherein the electromagnetic latch can release the locking of the movable cover plate according to the control signal of the controller.

[0007] In one possible implementation, the cylinder is provided with a slot, and the bottom of the movable cover is provided with a groove. The electromagnetic buckle includes: a slider, which is slidably disposed in the groove, and the end of the slider is provided with a plug-in part for inserting into the slot; a first elastic member, which is disposed in the groove and abuts against the end of the slider to keep the plug-in part in the slot in an inserted state; and an electromagnet, which is disposed in the groove and is used to magnetically attract the slider to disengage the plug-in part from the slot.

[0008] In one possible implementation, the insertion part has a wedge-shaped structure that can compress the first elastic element when it abuts against the cylinder.

[0009] In one possible implementation, the water inlet is located at the top of the cylinder, and the water sampler also includes a connecting pipe that communicates with the cylinder. A switch valve is installed on the connecting pipe, and the switch valve is electrically connected to a controller.

[0010] In one possible implementation, a second elastic element is provided between the movable cover and the cylinder, the second elastic element being used to push the movable cover to a second state when the insertion part disengages from the slot.

[0011] In one possible implementation, a limit block is provided on the cylinder to limit the opening angle of the movable cover, so that the movable cover switches to the first state by the resistance of the water when it rises.

[0012] In one possible implementation, the lifting mechanism includes: a motor; a cable reel disposed at the output end of the motor; and a traction rope wound around the cable reel, with the end of the traction rope away from the cable reel forming a traction end.

[0013] In one possible implementation, the controller includes a touch screen for displaying depth information of the water sampler and setting water sampling parameters.

[0014] In one possible implementation, the controller has a built-in processor that controls the lifting mechanism and sealing components based on signals from the depth sensor.

[0015] In one possible implementation, a power supply system is also included, which powers the lifting mechanism, controller, and depth sensor.

[0016] In one possible implementation, the controller controls the water sampling process as follows: it drives the lifting mechanism to lower the water sampler according to the set depth; it receives the depth signal fed back by the depth sensor; when the water sampler reaches the set depth, it controls the lifting mechanism to stop lowering the water sampler and simultaneously controls the sealing component to open to start water sampling; after water sampling is completed, it controls the lifting mechanism to retrieve the water sampler.

[0017] The water sampling device provided by this invention uses a lifting mechanism to lower the water sampler. A depth sensor installed on the water sampler can measure the water depth in real time and send the water depth information to the controller. When the target water depth is reached, the controller controls the lifting mechanism to stop lowering the water sampler, precisely stopping it at the target depth. The controller then controls the sealing component, which opens the water inlet, allowing the water sample to enter the cavity under water pressure. After the water sample is collected, the sealing component closes the water inlet, and the lifting mechanism raises the water sampler above the water surface, completing the water sample collection. This device can accurately obtain water samples at the target depth. Moreover, the sealing component prevents water samples at different depths from entering the cylinder during the lifting process, effectively preventing water sample contamination and ensuring the authenticity and reliability of the collected water samples. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of a water sampling device provided by the present invention.

[0020] Figure 2 This is a schematic diagram of the planar structure of a water sampling device provided by the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of a water sampler provided by the present invention.

[0022] Figure 4 This is a cross-sectional schematic diagram of a water sampler provided by the present invention.

[0023] Figure 5 This invention provides a kind of Figure 4 A magnified schematic diagram of the structure at point A.

[0024] Figure label: 1. Fixture; 2. Lifting mechanism; 21. Motor; 22. Cable reel; 23. Traction rope; 3. Water sampler; 31. Cylinder; 311. Water inlet; 312. Slot; 313. Limiting block; 32. Sealing assembly; 321. Movable cover; 3211. Slide groove; 322. Electromagnetic buckle; 3221. Slider; 3222. Insertion part; 3223. First elastic element; 3224. Electromagnet; 33. Connecting pipe; 34. Switch valve; 4. Depth sensor; 5. Controller; 6. Second elastic element. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0026] The following is combined Figure 1-5 A water sampling device provided in an embodiment of the present invention includes: a fixed frame 1, a lifting mechanism 2, a water sampler 3, a depth sensor 4, and a controller 5, wherein: The mounting bracket 1 is fixed to the hull, thereby securing the entire water sampling device to the hull.

[0027] The lifting mechanism 2 is mounted on the fixed frame 1, and the lifting mechanism 2 has a lifting traction end.

[0028] The water sampler 3 is installed at the traction end. The water sampler 3 includes a cylinder 31 and a sealing assembly 32. The cylinder 31 has a cavity and a water inlet 311 communicating with the cavity. The sealing assembly 32 is located at the water inlet 311 and is used to control the opening and closing of the water inlet 311.

[0029] The depth sensor 4 is installed on the water sampler 3 to collect the water depth at the location of the water sampler 3.

[0030] The controller 5 is electrically connected to the lifting mechanism 2, the sealing assembly 32 and the depth sensor 4.

[0031] In this invention, the water sampler 3 is lowered by the lifting mechanism 2. The depth sensor 4 is installed on the water sampler 3 to measure the water depth of the water sampler 3 in real time and send the water depth information to the controller 5. When the target water depth is reached, the controller 5 controls the lifting mechanism 2 to stop lowering the water sampler 3, and stops the water sampler 3 precisely at the target depth. The controller 5 controls the sealing component 32, which opens the water inlet 311, so that the water sample enters the cavity through the water inlet 311 under the action of water pressure. After the water sample is collected, the sealing component 32 closes the water inlet 311, and the lifting mechanism 2 drives the water sampler 3 to rise above the water surface to complete the water sample collection. It can accurately obtain water samples at the target depth. Moreover, under the action of the sealing component 32, it can prevent water samples of different depths from entering the cylinder 31 during the lifting process of the water sampler 3, effectively preventing water sample contamination and ensuring the authenticity and reliability of the collected water samples.

[0032] Specifically, the depth sensor 4 uses a waterproof water pressure sensor to accurately monitor the water sampling depth in real time and quickly transmit the data to the controller 5. The cylinder 31 is made of stainless steel, which is corrosion-resistant. Its volume is set according to actual sampling needs, generally 1-5 liters. It can also sink under its own weight to ensure stability during water sampling. When the water sampler 3 descends, the traction end pulls the top of the cylinder 31 to ensure that the cylinder 31 remains vertical. When the water sampler 3 rises, the traction end lifts the water sampler 3.

[0033] In related technologies, most current water samplers 3 are manually operated. Although simple to operate, they are labor-intensive. The depth of the water sampler 3 is estimated by the length of the rope. However, the rope can bend in the water, and the water sampler 3 may also deviate, resulting in the actual water sampler 3 being at a depth less than the rope length. This means the actual water sample depth is less than the target water depth, affecting the accuracy of the water sample. Furthermore, during the raising and lowering process, water samples of different depths can easily enter the water sampler 3, causing contamination and affecting the reliability of the water sample. In this embodiment of the invention, the water sampler 3 is lowered and raised using a lifting mechanism 2, saving manpower. Moreover, by installing a depth sensor 4 on the water sampler 3, the water depth detected by the depth sensor 4 is the target water depth, ensuring the accuracy of the water sample. The water inlet 311 is sealed by a sealing component 32 during the raising and lowering process, thus preventing water sample contamination and ensuring the reliability of the water sample.

[0034] In one specific embodiment, Miyun Reservoir is located in the northeastern part of Beijing, in the central part of Miyun District, situated in the lower reaches of the Chao and Bai Rivers. The reservoir spans both rivers, with a maximum water surface area of ​​188 square kilometers at its highest water level, a maximum storage capacity of 4.375 billion cubic meters, and a water depth of 60 meters. It is the most important surface drinking water source for Beijing, providing vital water resource security for the city's development and residents' lives. It also serves functions such as flood control, irrigation, power generation, wildlife habitat, and tourism. Therefore, monitoring the water quality and biological resources of Miyun is crucial. The water sampling device of this invention can improve the accuracy and efficiency of water sampling, providing strong support for reservoir sampling operations.

[0035] In some embodiments, the sealing assembly 32 includes: a movable cover plate 321, which is rotatably disposed on the cylinder 31, and has a first state of sealing the water inlet 311 and a second state of opening the water inlet 311; and an electromagnetic latch 322, which is disposed between the movable cover plate 321 and the cylinder 31 for locking the movable cover plate 321 in the first state; wherein the electromagnetic latch 322 can release the locking of the movable cover plate 321 according to the control signal of the controller 5.

[0036] In this invention, the movable cover plate 321 switches between sealing and opening the water intake port 311 by rotation. Compared with linear sliding, this has the advantages of smaller space occupation and shorter stroke, and is more adaptable to compact underwater environments. An electromagnetic latch 322 is located between the movable cover plate 321 and the cylinder 31, using electromagnetic force to achieve locking and releasing functions. When the controller 5 sends a control signal, the electromagnetic latch 322 instantly releases the constraint on the movable cover plate 321, allowing the movable cover plate 321 to quickly switch from a closed state to an open state, completing the opening action of the water intake port 311.

[0037] Specifically, the rotating design of the movable cover 321 allows the water inlet 311 to be fully opened within a small angle range. In the first state, the movable cover 321 completely seals the water inlet 311, maintaining the internal seal of the cylinder 31. In the second state, the movable cover 321 opens the water inlet 311, allowing water at the target depth to enter the cavity of the cylinder 31. The electromagnetic latch 322 remains locked before receiving a control signal and immediately releases the constraint force after receiving the signal. The cylinder 31 is made of stainless steel, ensuring the flatness and sealing of the mounting surface. The contact surface between the movable cover 321 and the cylinder 31 forms a reliable sealing interface.

[0038] In related technologies, traditional water samplers 3 are typically opened using threaded rotation or push-pull sliding methods. Threaded rotation requires multiple turns and is prone to jamming in water pressure environments, while push-pull sliding requires a long travel space, is difficult to seal, has a slow opening response speed, and is difficult to achieve precise timing control. In this embodiment of the invention, the rotating opening of the movable cover 321 only requires a small angle rotation to fully open the water intake 311. The electromagnetic latch 322's electrical control characteristics make the opening timing precise and controllable, with a fast response speed, avoiding the complexity and reliability problems of mechanical transmission.

[0039] In some embodiments, the cylinder 31 is provided with a slot 312, the bottom of the movable cover plate 321 is provided with a slide groove 3211, and the electromagnetic buckle 322 includes: a slider 3221, which is slidably disposed in the slide groove 3211, and the end of the slider 3221 is provided with a plug portion 3222 for inserting into the slot 312; a first elastic member 3223, which is disposed in the slide groove 3211 and abuts against the end of the slider 3221 to keep the plug portion 3222 in the slot 312 in an inserted state; and an electromagnet 3224, which is disposed in the slide groove 3211 and is used to magnetically attract the slider 3221 to disengage the plug portion 3222 from the slot 312.

[0040] In this invention, the linear motion of the slider 3221 within the groove 3211, combined with the engagement of the end insertion part 3222 and the slot 312 of the cylinder 31, constitutes a mechanical locking and restraining mechanism. The first elastic element 3223 abuts against the end of the slider 3221 and generates a continuous thrust under compression, pushing the insertion part 3222 into the slot 312 to form a firm connection. When the electromagnet 3224 is energized, the magnetic attraction force overcomes the thrust of the first elastic element 3223, pulling the slider 3221 in the opposite direction to disengage the insertion part 3222 from the slot 312, thus realizing the electronically controlled unlocking function.

[0041] Specifically, the sliding of slider 3221 within groove 3211 allows the insertion part 3222 to switch between inserted and disengaged states. The first elastic element 3223, after compression, stores elastic potential energy and continuously pushes slider 3221 to maintain the inserted state. When electromagnet 3224 is energized, the magnetic force instantaneously attracts slider 3221, causing insertion part 3222 to completely disengage from slot 312. After electromagnet 3224 is de-energized, the pushing force of the first elastic element 3223 regains dominance, pushing slider 3221 back to its original position. The constraint of groove 3211 on the movement trajectory of slider 3221 ensures accurate positioning of insertion part 3222 and avoids jamming.

[0042] In some embodiments, the insertion portion 3222 has a wedge-shaped structure that can compress the first elastic member 3223 when it abuts against the cylinder 31.

[0043] In this invention, the wedge-shaped structure of the insertion part 3222 provides guidance when its inclined surface contacts the surface of the cylinder 31. The angle of the inclined surface decomposes the contact force into a component force along the direction of the slide groove 3211, pushing the slider 3221 to move and compressing the first elastic element 3223. The wedge-shaped guiding function enables the insertion part 3222 to automatically find the position of the slot 312. When the movable cover plate 321 rotates to align the insertion part 3222 with the axis of the slot 312, the compressed first elastic element 3223 releases its elastic force and quickly pushes the insertion part 3222 into the slot 312, achieving an automatic locking function.

[0044] Specifically, the conical angle design of the wedge structure enables the insertion part 3222 to generate a self-guiding effect when it contacts the surface of the cylinder 31. The frictional force and normal force between the inclined surface and the contact surface work together to push the slider 3221 backward. At the same time, the first elastic element 3223 is further compressed to store more elastic potential energy. When the insertion part 3222 finds the slot 312 and aligns with the axis, the first elastic element 3223 instantly pushes the slider 3221 forward, driving the insertion part 3222 to quickly insert and complete the locking. The optimized design of the wedge angle balances the guiding effect and the insertion resistance.

[0045] In some embodiments, the water inlet 311 is located at the top of the cylinder 31, and the water sampler 3 further includes a connecting pipe 33 communicating with the cylinder 31. A switching valve 34 is provided on the connecting pipe 33, and the switching valve 34 is electrically connected to the controller 5.

[0046] In this invention, the connecting pipe 33, after connecting to the cylinder 31, establishes a pressure balance channel between the inside and outside, eliminating the pressure difference between the inside and outside in the deep water environment. The switching valve 34 is located on the connecting pipe 33 and electrically connected to the controller 5, enabling precise control over the timing of pressure balance establishment. The water inlet 311 is located at the top of the cylinder 31, forming the main water inlet path. When the switching valve 34 is opened, external water quickly enters the cylinder 31 through the connecting pipe 33, balancing the pressure and creating conditions for the smooth opening of the sealing assembly 32, significantly reducing the driving force required for opening. By setting the water inlet 311 at the top of the cylinder 31, after water collection is completed, the lifting mechanism 2 drives the water collector 3 to rise. The movable cover plate 321 can be re-covered on the top of the cylinder 31 under the action of water resistance. The wedge-shaped structure of the insertion part 3222 abuts against the top edge of the cylinder 31 and compresses the first elastic member 3223 until the insertion part 3222 is aligned with the slot 312. Under the action of the first elastic member 3223, the insertion part 3222 is inserted into the slot 312 again, realizing automatic locking.

[0047] Specifically, the inner diameter design of the connecting pipe 33 ensures rapid pressure equalization; the electronic control characteristics of the switching valve 34 allow its operation to precisely coordinate with the electromagnetic latch 322; the water inlet 311 is located at the top to avoid eddies and sediment interference that may occur from lateral water intake; and the placement of the connecting pipe 33 is optimized to minimize its impact on water flow. The switching valve 34 employs a solenoid valve structure, offering fast response and reliable sealing.

[0048] In related technologies, traditional water samplers 3 typically have only a single sampling opening. In deep-water, high-pressure environments, the large pressure difference between the inside and outside makes it difficult to open the sealing cover, requiring a high-power drive device to overcome the pressure difference, increasing system complexity and energy consumption, and resulting in a high failure rate. In this embodiment of the invention, the connecting pipe 33 establishes pressure balance in advance, significantly reducing the driving force required to open the sealing component 32. The precise control of the switching valve 34 makes the timing of pressure balance controllable, forming an orderly coordination with subsequent opening actions, thereby improving the success rate of deep-water sampling.

[0049] In some embodiments, a second elastic member 6 is provided between the movable cover plate 321 and the cylinder 31. The second elastic member 6 is used to push the movable cover plate 321 to a second state when the insertion part 3222 disengages from the slot 312.

[0050] In this invention, the second elastic element 6 is disposed between the movable cover plate 321 and the cylinder 31. When the movable cover plate 321 is in the first state, it remains compressed and stores elastic potential energy. When the insertion part 3222 disengages from the slot 312, the movable cover plate 321 loses its locking constraint, and the elastic potential energy stored in the second elastic element 6 is immediately released, pushing the movable cover plate 321 from the first state to the second state to open the water intake port 311. The elastic drive method ensures rapid response and reliable execution of the opening action, avoiding the uncertainty of external force sources.

[0051] Specifically, the elastic force and compression of the second elastic element 6 determine the opening speed and final angle. The elastic element is made of corrosion-resistant material to ensure long-term stability, and the compression design balances opening force and service life. The installation position of the elastic element is optimized to achieve the best lever arm effect. The second elastic element 6 releases all its stored energy the moment the electromagnetic latch 322 unlocks, pushing the movable cover 321 to rotate rapidly.

[0052] In some embodiments, a limiting block 313 is provided on the cylinder 31. The limiting block 313 is used to limit the opening angle of the movable cover 321 so that the movable cover 321 switches to the first state by the resistance of water when it rises.

[0053] In this invention, the limiting block 313 restricts the opening angle of the movable cover 321, causing the movable cover 321 to form a specific force angle with the water flow when it rises. When the water sampler 3 rises, the relative impact of the water flow on the movable cover 321 constrained by the limiting block 313 generates fluid resistance. This resistance creates an uneven pressure distribution on the movable cover 321, generating a net torque around the rotation axis. When the fluid resistance torque exceeds the resistance torque of the second elastic element 6, the movable cover 321 begins to rotate towards the first state until the water intake 311 is closed, realizing the automatic closing function using the upward motion.

[0054] Specifically, the angle of the limiting block 313 is optimized through fluid dynamics calculations to ensure sufficient closing torque at the preset rising speed. The force analysis of the movable cover 321 under the action of water flow takes into account the density changes at different water depths, and the change in the force-bearing area during rotation makes the closing process smooth and controllable. The limiting block 313 is made of impact-resistant material, which can withstand long-term water flow impact without deformation.

[0055] In this embodiment of the invention, the cooperation between the limiting block 313 and the water flow resistance enables automatic closing. The closing timing is naturally synchronized with the upward movement, eliminating the need for an additional power source and control circuit. This ensures sufficient sampling and prevents water sample contamination during the upward process, simplifying the control system.

[0056] In some embodiments, the lifting mechanism 2 includes: a motor 21; a cable reel 22 disposed at the output end of the motor 21; and a traction rope 23 wound around the cable reel 22, with the end of the traction rope 23 away from the cable reel 22 forming a traction end.

[0057] In this invention, the rotational power generated by the motor 21 is converted into the linear motion of the traction rope 23 via the cable reel 22, achieving a highly efficient conversion from electric drive to mechanical transmission. The traction rope 23, wound around the cable reel 22, establishes a force transmission path. The product of the motor 21's rotational speed and the cable reel 22's radius determines the lifting speed of the traction end, which can be precisely adjusted by controlling the motor 21's rotational speed. The entire transmission system is simple in structure and highly efficient, providing reliable power for the precise positioning of the water sampler 3.

[0058] Specifically, the motor 21 is a waterproof servo motor with good speed regulation performance and position control accuracy. The cable reel 22 is made of high-strength aluminum alloy with anodized surface to improve corrosion resistance. The traction rope 23 is made of high-strength, low-elongation material to ensure accurate force transmission. A rigid connection is used between the motor 21 and the cable reel 22 to avoid transmission gaps. The frequency converter 5 can continuously adjust the speed of the motor 21. The traction rope 23 is a composite functional cable, including steel wire rope and cable, where the steel wire rope ensures structural strength and the cable is used for electrical connection. The connection between the traction end and the cylinder 31 uses a hook and a release buckle, which can achieve a reliable and convenient connection with the cylinder 31.

[0059] In some embodiments, the controller 5 includes a touch screen for displaying depth information of the water sampler 3 and setting water sampling parameters.

[0060] In this invention, a touchscreen is integrated into the controller 5 to provide a graphical human-machine interface, displaying key parameters such as the depth information of the water sampler 3 and the system status in a clear and intuitive manner in real time. Operators can directly set water sampling parameters by touching the screen. The graphical interface simplifies complex equipment control into intuitive touch operation, lowers the technical threshold for operation, reduces the possibility of operational errors, and improves the convenience and reliability of field operations.

[0061] Specifically, the touchscreen uses resistive touch technology, making it suitable for operation while wearing gloves in the field. The display interface design takes into account readability in both strong and low light environments. The parameter setting interface uses a combination of icons and numbers, and the operation logic conforms to the operating habits of commonly used devices. The screen size is moderate, ensuring both the clarity of the displayed content and the portability of the device.

[0062] Optionally, the controller 5 can also operate buttons including a power switch, a depth setting button, a lowering button, a retraction button, a sampling button, etc., to facilitate operators in performing various operations.

[0063] In some embodiments, the controller 5 has a built-in processor that controls the lifting mechanism 2 and the sealing assembly 32 based on the signal from the depth sensor 4.

[0064] In this invention, the processor, as the core processing unit of the controller 5, receives the electrical signal output from the depth sensor 4 and performs real-time data processing. Accurate depth information is obtained through signal filtering and numerical calculation. The processor compares the depth data with a preset target depth to determine whether the water sampler 3 has reached the designated position. It then generates corresponding control commands to drive the lifting mechanism 2 and the sealing assembly 32 to perform corresponding actions, thus realizing an automatic control function based on depth feedback.

[0065] Specifically, the processor adopts a 32-bit ARM architecture, which has powerful data processing capabilities and rich interface resources. The built-in ADC module directly processes the sensor analog signals, the digital filtering algorithm removes signal noise caused by water flow disturbance, the control algorithm considers the influence of different water densities on depth measurement, and the multi-task processing capability enables it to process multiple control loops simultaneously.

[0066] In some embodiments, a power system is also included, which powers the lifting mechanism 2, the controller 5, and the depth sensor 4.

[0067] In summary, the power system of this invention provides independent power to the lifting mechanism 2, controller 5, and depth sensor 4. Through integrated power management, each component can obtain stable voltage and current under different operating conditions. The power system eliminates dependence on external power sources, enabling the entire device to operate autonomously for extended periods in field environments far from mains power, solving the power supply problem for field water quality monitoring operations and significantly expanding the application range of the equipment.

[0068] Specifically, the power system uses a rechargeable lithium battery pack with a voltage of 12-24 volts and a capacity precisely configured according to the equipment's power consumption, typically 10-20 amps. Installed in a waterproof box, it provides stable power to the motor 21, controller 5, and depth sensor 4 via wiring, and is equipped with a charger for convenient field charging. The lithium battery pack design features high energy density and low self-discharge rate. An integrated BMS battery management system monitors battery status in real time, and a DC-DC converter provides the required operating voltage to different components. An overload protection circuit automatically cuts off power in abnormal situations to prevent equipment damage. The battery capacity is designed based on typical operational intensity to meet all-weather operation requirements.

[0069] In some embodiments, the controller 5 controls the water sampling process in the following manner: it drives the lifting mechanism 2 to lower the water sampler 3 according to the set depth; it receives the depth signal fed back by the depth sensor 4; when the water sampler 3 reaches the set depth, it controls the lifting mechanism 2 to stop lowering the water sampler 3, and at the same time controls the sealing component 32 to open to collect water; after the water sampling is completed, it controls the lifting mechanism 2 to retrieve the water sampler 3.

[0070] In this invention, the controller 5 executes the complete water sampling operation according to a preset programmed process, establishing a standardized control flow from lowering the water sampler 3 to retrieving it. A depth signal feedback judgment mechanism ensures that each control action is executed at precise timing, and the synchronous control of stopping the lowering and opening the sealing assembly 32 guarantees the accuracy of the water sampling timing. Programmed control eliminates the subjectivity and arbitrariness of manual operation, improves the consistency and reproducibility of water sampling operations, and makes the sampling results from different batches more comparable.

[0071] Specifically, the control program employs a state machine design, with clearly defined transition conditions between states, a robust exception handling mechanism, real-time recording and playback of program execution, and the ability to preset and save operating parameters for different work modes. It supports batch operations and remote control. The standardization of the control process ensures excellent consistency and repeatability of the equipment.

[0072] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; 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; and these 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 water sampling device, characterized in that, include: Fixture (1); A lifting mechanism (2) is mounted on the fixed frame (1), and the lifting mechanism (2) has a lifting traction end; A water sampler (3) is installed at the traction end. The water sampler (3) includes a cylinder (31) and a sealing assembly (32). The cylinder (31) has a cavity and a water inlet (311) communicating with the cavity. The sealing assembly (32) is located at the water inlet (311) and is used to control the opening and closing of the water inlet (311). A depth sensor (4) is installed on the water sampler (3) to collect the water depth at the location of the water sampler (3); The controller (5) is electrically connected to the lifting mechanism (2), the sealing assembly (32) and the depth sensor (4).

2. The water sampling device according to claim 1, characterized in that, The sealing assembly (32) includes: A movable cover plate (321) is rotatably mounted on the cylinder (31). The movable cover plate (321) has a first state of sealing the water inlet (311) and a second state of opening the water inlet (311). An electromagnetic buckle (322) is disposed between the movable cover plate (321) and the cylinder (31) for locking the movable cover plate (321) in the first state. The electromagnetic buckle (322) can release the locking of the movable cover plate (321) according to the control signal of the controller (5).

3. The water sampling device according to claim 2, characterized in that, The cylinder (31) is provided with a slot (312), the bottom of the movable cover plate (321) is provided with a sliding groove (3211), and the electromagnetic buckle (322) includes: The slider (3221) is slidably disposed in the groove (3211), and the end of the slider (3221) is provided with a plug-in part (3222) for insertion into the slot (312). A first elastic element (3223) is disposed in the slide groove (3211). The first elastic element (3223) abuts against the end of the slider (3221) so that the insertion part (3222) and the slot (312) remain in the insertion state. An electromagnet (3224) is disposed in the slide groove (3211). The electromagnet (3224) is used to magnetically attract the slider (3221) so that the insertion part (3222) disengages from the slot (312).

4. The water sampling device according to claim 3, characterized in that, The insertion part (3222) has a wedge-shaped structure that can compress the first elastic member (3223) when it abuts against the cylinder (31).

5. The water sampling device according to claim 3, characterized in that, The water inlet (311) is located at the top of the cylinder (31). The water sampler (3) also includes a connecting pipe (33) connected to the cylinder (31). A switch valve (34) is provided on the connecting pipe (33), and the switch valve (34) is electrically connected to the controller (5).

6. The water sampling device according to claim 5, characterized in that, A second elastic member (6) is provided between the movable cover plate (321) and the cylinder (31). The second elastic member (6) is used to push the movable cover plate (321) to the second state when the insertion part (3222) is disengaged from the slot (312).

7. The water sampling device according to claim 5, characterized in that, A limiting block (313) is provided on the cylinder (31). The limiting block (313) is used to limit the opening angle of the movable cover (321) so that the movable cover (321) switches to the first state by the resistance of water when it rises.

8. The water sampling device according to any one of claims 1-7, characterized in that, The lifting mechanism (2) includes: Motor (21); A cable reel (22) is disposed at the output end of the motor (21); A traction rope (23) is wound around the cable reel (22), and the end of the traction rope (23) away from the cable reel (22) forms the traction end.

9. The water sampling device according to any one of claims 1-7, characterized in that, The controller (5) includes a touch screen, which is used to display the depth information of the water sampler (3) and set the water sampling parameters.

10. The water sampling device according to any one of claims 1-7, characterized in that, The controller (5) has a built-in processor that controls the lifting mechanism (2) and the sealing assembly (32) based on the signal from the depth sensor (4).

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