Intelligent water level detection device and water level detection method

Abstract

The invention relates to an intelligent water level detection device and a water level detection method, and relates to the technical field of water level detection.The intelligent water level detection device comprises a base, a supporting column is fixedly connected to one side of the top of the base, a side frame is fixedly connected to one side of the top end of the supporting column, and a detection base is connected to one side of the side frame through an adjusting assembly; the bottom end of the detection seat is fixedly connected with an ultrasonic detector, one side of the ultrasonic detector is provided with a gradienter, one side of the bottom of the detection seat is fixedly connected with a linkage detection mechanism, and one side of the base station is provided with a controller. The linkage detection mechanism serves as a contact type measurement unit capable of being lowered, the controller serves as a central brain to coordinate all parts to work, non-contact measurement, contact measurement, posture monitoring and intelligent control are integrated, and an intelligent monitoring structure which is compact in structure and composite in function is achieved.

Description

Technical Field

[0001] This application relates to the field of water level detection technology, and in particular to a smart water level detection device and water level detection method. Background Technology

[0002] Water level monitoring is a core foundational task in the fields of hydrology, water conservancy, disaster prevention and mitigation, and water resources management.

[0003] Traditional contact-type water level measurement devices, such as float-type water level gauges and pressure-type water level gauges, are technically mature, but their sensing parts need to be submerged in water for a long time. They are susceptible to the effects of water siltation, biological attachment, freezing corrosion and water flow impact, which leads to decreased measurement accuracy and frequent equipment damage. Moreover, installation and maintenance usually require the construction of dedicated stilling wells or underwater fixed structures, which are costly and lack flexibility.

[0004] Non-contact measurement technologies, such as ultrasonic and radar level gauges, calculate the water level by measuring the distance from the sensor to the water surface, avoiding direct contact between the sensing components and the water body, which significantly improves reliability. However, the performance of ultrasonic level gauges is easily affected by environmental temperature and humidity, wind and rain, and water surface vapor. Although radar level gauges are more stable, they are more expensive. Summary of the Invention

[0005] The purpose of this application is to provide an intelligent water level detection device and a water level detection method.

[0006] Firstly, the intelligent water level detection device provided in this application adopts the following technical solution:

[0007] A smart water level detection device includes a base, a support column fixedly connected to one side of the top of the base, a side frame fixedly connected to one side of the top of the support column, a detector seat connected to one side of the side frame via an adjustment component, an ultrasonic detector fixedly connected to the bottom of the detector seat, a level mounted on one side of the ultrasonic detector, a linkage detection mechanism fixedly connected to one side of the bottom of the detector seat, and a controller provided on one side of the base.

[0008] By adopting the above technical solution, the base and support column provide a stable installation foundation, the side frame extends the installation space, the adjustment component supports and adjusts the attitude of the detector seat, the detector seat serves as the core support platform, the ultrasonic detector at its bottom performs the main non-contact ranging, the level provides the attitude reference, the linkage detection mechanism serves as a descendable contact measurement unit, and the controller serves as the central brain, coordinating the work of all components, integrating non-contact measurement, contact measurement, attitude monitoring and intelligent control into one, realizing a compact and functionally complex intelligent monitoring structure.

[0009] The adjustment assembly includes a fixed frame, an electric push rod, a rotating shaft, a slide groove, and a guide slider. The fixed frame is fixedly connected to the end of the side frame. One side of the fixed frame is hinged to the probe seat via the rotating shaft. The electric push rod is fixedly connected to the top side of the fixed frame. A slide groove is provided on the outer wall of one side of the probe seat. A guide slider is slidably connected inside the slide groove. The end of the electric push rod is hinged to the guide slider via a movable shaft.

[0010] By adopting the above technical solution, when the level detects that the ultrasonic detector's emitting surface is not level, the controller drives the electric push rod to extend or retract. The electric push rod pushes or pulls the guide slider to slide in the groove of the detector seat. Since the detector seat is hinged to the fixed frame through a rotating shaft, the linear motion of the guide slider is converted into the pitch rotation of the detector seat around the rotating shaft, thereby precisely adjusting the angle of the ultrasonic detector until the level feedback indicates that it has reached a level state. This achieves automatic and high-precision dynamic calibration of the ultrasonic detector's emitting angle. The groove and the guide slider form a stable kinematic pair, ensuring the smoothness and accuracy of the adjustment process. It avoids systematic ranging errors caused by the probe's emitting surface tilting due to the base being in a sloping position, thus ensuring the long-term benchmark reliability of non-contact measurement data.

[0011] The linkage detection mechanism includes a fixed base, a drive rod, a storage cylinder, a pull wire, a counterweight, a displacement sensor, a first capacitive sensor, an auxiliary cylinder, a float, and a second capacitive sensor. The fixed base is fixedly connected to one side of the bottom of the detection base. The drive rod is connected to the inner wall of the fixed base via a bearing. The storage cylinder is fixedly connected to the outer wall of the middle part of the drive rod. The pull wire is connected around the outer wall of the storage cylinder. The bottom end of the pull wire is fixedly connected to a counterweight. The displacement sensor is fixedly connected inside the counterweight. A first capacitive sensor is provided on one side of the displacement sensor.

[0012] By adopting the above technical solution, the servo motor drives the drive rod and the storage cylinder to rotate, releasing the wound pull line. Under the action of gravity, the counterweight moves the entire measuring chain down. The displacement sensor measures the release length of the pull line in real time to preliminarily determine the descent depth. During the descent, the float slides along the auxiliary cylinder to the water surface position by buoyancy. The first and second capacitor sensors form a sensing pair. When the float moves to a specific relative position with the first capacitor sensor on the counterweight, the capacitance signal changes, which is used to accurately position the float and obtain water level data. When not measuring, it can be retracted to protect the sensor from long-term water flow impact, greatly improving its survivability and reliability in harsh hydrological environments.

[0013] The outer wall of the pull cord is fitted with an auxiliary cylinder. Multiple sets of auxiliary cylinders are provided and are also wound around the outer wall of the storage cylinder. Adjacent auxiliary cylinders are hinged together. A float is fitted on the outer wall of the auxiliary cylinder. A second capacitive sensor is fixedly connected to one side of the float. The second capacitive sensor is matched with the first capacitive sensor.

[0014] By adopting the above technical solution, the auxiliary cylinders are mounted on the pull line and are hinged to each other, so that they can bend flexibly like a chain during release and descent, adapting to complex water paths. The float can slide freely. When precise measurement is required, tightening the pull line can make the hinged auxiliary cylinder array tend to be aligned in a straight line, providing the float with a relatively rigid sliding guide rail, reducing its lateral sway on the undulating water surface, and improving the accuracy of capacitor positioning.

[0015] A servo motor is fixedly connected to one side of the outer wall of the fixed base. The output end of the servo motor is fixedly connected to the drive rod. A positioning ring is fixedly connected to one side of the bottom of the fixed base. The positioning ring is sleeved on the outside of the auxiliary cylinder, and an electric clamp is provided in the middle of the positioning ring.

[0016] By adopting the above technical solution, the servo motor provides the core power for the winding and unwinding of the storage tube, and the positioning ring serves as the guide and locking base point for the extension mechanism of the measuring chain. When the wire is unwound, the electric clamp closes and tightly holds the top auxiliary tube, fixing its position in three-dimensional space, thus forming a stable mechanical fulcrum at the top. Together with the bottom counterweight anchor point, it enables the tension measuring chain in the middle to obtain the best stability.

[0017] A tensioning box is fixedly connected to one side of the outer wall of the storage tube. The end of the pull line away from the counterweight extends through the storage tube into the tensioning box. A tensioning roller is connected to the middle inner wall of the tensioning box through a bearing. The pull line is fixedly connected to the tensioning roller and is wound around the outer wall of the tensioning roller. A tensioning motor is fixedly connected to the top of the tensioning box, and the output end of the tensioning motor is connected to the tensioning roller.

[0018] By adopting the above technical solution, during the measurement stage, the tensioning motor drives the tensioning roller to rotate, and the inner end of the winding cable is opposite to the other end connected to the counterweight. This action does not change the total length of the cable released, but rather applies an additional tension force to the entire cable after the counterweight has touched the bottom or is suspended. This force is transmitted through the cable, eliminating the hinge gap between the series-connected auxiliary cylinders and pressing them together, thereby straightening and tightening the flexible chain.

[0019] A data fusion module is provided on one side of the controller, and a communication module is provided on the other side of the data fusion module. The data fusion module is electrically connected to the ultrasonic detector, displacement sensor, first capacitive sensor and second capacitive sensor.

[0020] By adopting the above technical solution, the data fusion module receives in real time non-contact distance signals from the ultrasonic detector, wire length signals from the displacement sensor, and precise float positioning signals from the No. 1 and No. 2 capacitive sensors. It performs time alignment, confidence assessment, error compensation, and optimal estimation calculation on each data source, and finally outputs a fused water level value with a reliability far higher than that of any single sensor data. The result is uploaded through the communication module.

[0021] A drive box is fixedly connected to the outer wall of the fixed base away from the servo motor. One end of the drive rod extends through the fixed base into the drive box. A drive gear is fixedly connected to the end of the drive rod. A linkage rod is connected to one side of the inner wall of the drive box via a bearing. A driven gear is fixedly connected to the middle of the linkage rod. The driven gear meshes with the drive gear, and the diameter of the driven gear is smaller than that of the drive gear. One end of the linkage rod extends through the drive box to the outside, and a spiral blade fan is fixedly connected to the end of the linkage rod. The spiral blade fan is located on one side of the ultrasonic detector's emitting surface.

[0022] By adopting the above technical solution, during the retraction of the measuring mechanism, the servo motor reverses, and the drive rod drives the active gear to rotate. Through the meshing of the driven gear and the active gear, the linkage rod and the spiral fan installed at its end are driven to rotate at high speed. The small-diameter driven gear plays a role in speeding up the rotation. The rotation of the spiral fan generates directional airflow, which sweeps the ultrasonic detector emitting surface directly below. This achieves power diversion and coordinated drive, eliminating the need for a separate motor and drive circuit for the cleaning function. This greatly simplifies the structure, reduces cost and power consumption, and maintains the stability and accuracy of non-contact measurement during long-term operation.

[0023] The detection method includes the following steps:

[0024] Step 1: Benchmark Calibration. The controller initiates a system self-test to confirm the status of each sensor and actuator. Subsequently, it controls the servo motor to drive the drive rod to rotate, releasing the pull line wound on the storage cylinder. The counterweight sinks under gravity, driving the chain composed of multiple hinged auxiliary cylinders and the float to be lowered vertically into the water. At the same time, the controller reads the level instrument data and drives the electric push rod in the adjustment component to extend and retract, causing the detector seat to rotate around the rotation axis. Utilizing the guiding action of the slide and guide slider, the emitting surface of the ultrasonic detector is automatically adjusted to a horizontal state, completing the automatic calibration of the measurement benchmark.

[0025] Step 2: Water level detection. After the linkage detection mechanism is lowered into place, the electric clamp is activated to close and lock the auxiliary cylinder at the positioning ring. The controller starts the tensioning motor to wind up the tensioning roller, thereby tensioning the pull line. Under the action of the pull line tension, each hinged auxiliary cylinder is straightened and aligned, thus forming a stable collimation measurement reference axis to resist water flow impact and reduce bending error. In this stable state, ultrasonic waves are emitted by the ultrasonic detector for non-contact distance measurement, and the length of the pull line is measured by the displacement sensor. The first capacitive sensor and the second capacitive sensor on the float accurately locate the position of the float through capacitive coupling signal, and together obtain contact water level data.

[0026] Step 3: Data fusion. The data fusion module receives and processes the collected multi-source data in real time. It performs data consistency verification and filtering on the measurement values ​​of the No. 1 and No. 2 capacitive sensors and the ultrasonic detector. Then, it uses an adaptive weighted fusion algorithm to fuse the non-contact and contact measurement results, calculates the final water level value with high reliability, and sends it through the communication module.

[0027] Step 4: Cleaning after testing. After testing, the tension motor is tightened to loosen the pull wire. The servo motor is started in reverse to wind up the pull wire. At the same time, the drive rod rotates, driving the active gear, driven gear and linkage rod to rotate, causing the spiral fan to rotate and clean the airflow on the transmitting surface of the ultrasonic detector, ensuring the cleanliness of the signal transmitting surface during measurement.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. The detector base is used as the core support platform. The ultrasonic detector at the bottom performs the main non-contact ranging, the level provides the attitude reference, the linkage detection mechanism is used as a demountable contact measurement unit, and the controller is used as the central brain to coordinate the work of all components. It integrates non-contact measurement, contact measurement, attitude monitoring and intelligent control into one, realizing a compact and functional intelligent monitoring structure.

[0030] 2. During the retraction of the measuring mechanism, the servo motor reverses, and the drive rod drives the active gear to rotate. Through the meshing of the driven gear and the active gear, the linkage rod and the spiral fan installed at its end are driven to rotate at high speed. The small-diameter driven gear plays a role in speeding up the rotation. The rotation of the spiral fan generates directional airflow, which sweeps the ultrasonic detector emitting surface directly below. This achieves power diversion and coordinated drive, eliminating the need for a separate motor and drive circuit for the cleaning function. This greatly simplifies the structure, reduces cost and power consumption, and maintains the stability and accuracy of non-contact measurement during long-term operation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 2 This is a three-dimensional structural diagram of the linkage detection mechanism according to an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the connection structure between the detector base and the ultrasonic detector according to an embodiment of this application;

[0034] Figure 4 This is a front view structural diagram of the linkage detection mechanism according to an embodiment of this application;

[0035] Figure 5 This is a schematic diagram of the connection structure between the pull wire and the tension roller according to an embodiment of this application;

[0036] Figure 6 This is a diagram showing the connection structure between the pull wire and the counterweight block according to an embodiment of this application;

[0037] Figure 7 This is a schematic diagram of the adjustment component structure according to an embodiment of this application;

[0038] Figure 8 This is a schematic flowchart of the measurement method according to an embodiment of this application;

[0039] Explanation of reference numerals in the attached drawings: 1. Base; 101. Controller; 2. Support column; 3. Side frame; 4. Adjustment assembly; 401. Fixed frame; 402. Electric push rod; 403. Rotating shaft; 404. Slide groove; 405. Guide slider; 5. Detector seat; 6. Ultrasonic detector; 7. Level; 8. Linkage detection mechanism; 81. Fixed seat; 9. Drive rod; 10. Storage cylinder; 11. Pull line; 12. Counterweight; 13. Displacement sensor; 14. No. 1 capacitive sensor; 15. Auxiliary cylinder; 16. Float; 17. No. 2 capacitive sensor; 18. Servo motor; 19. Positioning ring; 20. Electric clamp; 21. Tensioning box; 22. Tensioning roller; 23. Tensioning motor; 24. Data fusion module; 241. Communication module; 25. Drive box; 26. Drive gear; 27. Linkage rod; 28. Driven gear; 29. ​​Spiral blade fan. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1 - Appendix Figure 8 This application will be described in further detail below.

[0041] Example 1: A smart water level detection device includes a base 1, a support column 2 fixedly connected to one side of the top of the base 1, a side frame 3 fixedly connected to one side of the top of the support column 2, a detector seat 5 connected to one side of the side frame 3 via an adjustment component 4, an ultrasonic detector 6 fixedly connected to the bottom of the detector seat 5, a level 7 mounted on one side of the ultrasonic detector 6, and a linkage detection mechanism 8 fixedly connected to the bottom of the detector seat 5. A controller 101 is provided on one side of the base 1. The base 1 and the support column 2 provide a stable installation foundation, the side frame 3 extends into the installation space, the adjustment component 4 supports and adjusts the posture of the detector seat 5, the detector seat 5 serves as the core support platform, the ultrasonic detector 6 at its bottom performs primary non-contact ranging, the level 7 provides a posture reference, the linkage detection mechanism 8 serves as a retractable contact measurement unit, and the controller 101 serves as the central brain, coordinating the work of all components and integrating non-contact measurement, contact measurement, posture monitoring, and intelligent control into one, realizing a compact and functionally complex smart monitoring structure.

[0042] The adjustment assembly 4 includes a fixed frame 401, an electric push rod 402, a rotating shaft 403, a slide groove 404, and a guide slider 405. The fixed frame 401 is fixedly connected to the end of the side frame 3. One side of the fixed frame 401 is hinged to the detector seat 5 via the rotating shaft 403. The electric push rod 402 is fixedly connected to the top side of the fixed frame 401. A slide groove 404 is provided on the outer wall of one side of the detector seat 5. The guide slider 405 is slidably connected inside the slide groove 404. The end of the electric push rod 402 is hinged to the guide slider 405 via a movable shaft. When the level 7 detects that the emitting surface of the ultrasonic detector 6 is not level, the controller 101 drives the electric push rod 402 to extend or retract. 2. Pushing or pulling the guide slider 405 makes it slide within the groove 404 of the probe seat 5. Since the probe seat 5 is hinged to the fixed frame 401 via the rotating shaft 403, the linear motion of the guide slider 405 is converted into the pitch rotation of the probe seat 5 around the rotating shaft 403, thereby precisely adjusting the angle of the ultrasonic detector 6 until the level 7 feedbacks that it has reached a horizontal state. This achieves automatic and high-precision dynamic calibration of the emission angle of the ultrasonic detector 6. The groove 404 and the guide slider 405 form a stable kinematic pair, ensuring the smoothness and accuracy of the adjustment process. This avoids systematic ranging errors caused by the tilt of the probe emission surface due to the base 1 being in a slope position, and ensures the long-term benchmark reliability of the non-contact measurement data.

[0043] The linkage detection mechanism 8 includes a fixed base 81, a drive rod 9, a storage cylinder 10, a pull wire 11, a counterweight 12, a displacement sensor 13, a first-order capacitive sensor 14, an auxiliary cylinder 15, a float 16, and a second-order capacitive sensor 17. The fixed base 81 is fixedly connected to one side of the bottom of the detection base 5. The drive rod 9 is connected to the inner wall of the fixed base 81 via a bearing. The storage cylinder 10 is fixedly connected to the outer wall of the middle part of the drive rod 9. The pull wire 11 is connected around the outer wall of the storage cylinder 10. The counterweight 12 is fixedly connected to the bottom end of the pull wire 11. The displacement sensor 13 is fixedly connected inside the counterweight 12. A first-order capacitive sensor 14 is installed on one side of the displacement sensor 13. A servo motor 18 drives the drive rod 9. As the storage cylinder 10 rotates, the wound pull line 11 is released. Under the action of gravity, the counterweight 12 drives the entire measuring chain to descend. The displacement sensor 13 measures the release length of the pull line 11 in real time to preliminarily determine the descent depth. During the descent, the float 16 slides along the auxiliary cylinder 15 to the water surface position by means of buoyancy. The first capacitor sensor 14 and the second capacitor sensor 17 form a sensing pair. When the float 16 moves to a specific relative position with the first capacitor sensor 14 on the counterweight 12, the capacitance signal changes, which is used to accurately position the float 16 and obtain water level data. When not measuring, it can be retracted to protect the sensor from long-term water flow impact, which greatly improves its survivability and reliability in harsh hydrological environments.

[0044] The outer wall of the pull line 11 is fitted with an auxiliary cylinder 15. Multiple sets of auxiliary cylinders 15 are also wound around the outer wall of the receiving cylinder 10, and adjacent auxiliary cylinders 15 are hinged together. A float 16 is fitted on the outer wall of the auxiliary cylinder 15. A second capacitance sensor 17 is fixedly connected to one side of the float 16. The second capacitance sensor 17 matches the first capacitance sensor 14. The auxiliary cylinders 15 are fitted on the pull line 11 and are hinged together so that they can bend flexibly like a chain during release and descent to adapt to complex water paths. The float 16 can slide freely. When precise measurement is required, tightening the pull line 11 can make the array of hinged auxiliary cylinders 15 tend to be aligned in a straight line, providing a relatively rigid sliding guide for the float 16, reducing its lateral swing on the undulating water surface, and improving the accuracy of capacitance positioning.

[0045] A servo motor 18 is fixedly connected to one side of the outer wall of the fixed base 81. The output end of the servo motor 18 is fixedly connected to the drive rod 9. A positioning ring 19 is fixedly connected to one side of the bottom of the fixed base 81. The positioning ring 19 is sleeved on the outside of the auxiliary cylinder 15, and an electric clamp 20 is set in the middle of the positioning ring 19. The servo motor 18 provides the core power for the winding and unwinding of the storage cylinder 10. The positioning ring 19 serves as the guide and locking base point for the extension mechanism of the measuring chain. When the wire 11 is unwound, the electric clamp 20 closes and tightly holds the top auxiliary cylinder 15, fixing its position in three-dimensional space. This forms a stable mechanical fulcrum at the top, which works together with the anchor point of the counterweight block 12 at the bottom to make the tensioned measuring chain in the middle achieve optimal stability.

[0046] A tensioning box 21 is fixedly connected to one side of the outer wall of the storage cylinder 10. The end of the pull line 11 away from the counterweight 12 extends through the storage cylinder 10 into the tensioning box 21. A tensioning roller 22 is connected to the middle inner wall of the tensioning box 21 through a bearing. The pull line 11 is fixedly connected to the tensioning roller 22 and is wound around the outer wall of the tensioning roller 22. A tensioning motor 23 is fixedly connected to the top of the tensioning box 21. The output end of the tensioning motor 23 is connected to the tensioning roller 22. During the measurement stage, the tensioning motor 23 drives the tensioning roller 22 to rotate and wind up the inner end of the pull line 11 to the other end opposite to the connection end of the counterweight 12. This action does not change the total length of the pull line 11. Instead, it applies an additional tension force to the entire pull line 11 after the counterweight 12 has touched the bottom or is suspended. This force is transmitted through the pull line 11, eliminating the hinge gap between the series auxiliary cylinders 15 and pressing them together, thereby straightening and tightening the flexible chain.

[0047] A data fusion module 24 is provided on one side of the controller 101, and a communication module 241 is provided on the other side of the data fusion module 24. The data fusion module 24 is electrically connected to the ultrasonic detector 6, the displacement sensor 13, the first capacitive sensor 14, and the second capacitive sensor 17. The data fusion module 24 receives in real time the non-contact distance signal from the ultrasonic detector 6, the length signal of the pull wire 11 from the displacement sensor 13, and the precise positioning signal of the float 16 from the first capacitive sensor 14 and the second capacitive sensor 17. It performs time alignment, confidence assessment, error compensation, and optimal estimation calculation on each data source, and finally outputs a fused water level value with a reliability far higher than that of any single sensor data. The result is uploaded through the communication module 241.

[0048] A drive box 25 is fixedly connected to the outer wall of the fixed base 81 on the side away from the servo motor 18. One end of the drive rod 9 extends through the fixed base 81 into the drive box 25. A drive gear 26 is fixedly connected to the end of the drive rod 9. A linkage rod 27 is connected to one side of the inner wall of the drive box 25 via a bearing. A driven gear 28 is fixedly connected to the middle of the linkage rod 27. The driven gear 28 meshes with the drive gear 26, and the diameter of the driven gear 28 is smaller than that of the drive gear 26. One end of the linkage rod 27 extends through the drive box 25 to the outside, and a spiral fan 29 is fixedly connected to the end of the linkage rod 27. The spiral fan 29 is located at the ultrasonic detector 6. On one side of the emission surface, during the retraction of the measuring mechanism, the servo motor 18 reverses, and the drive rod 9 drives the active gear 26 to rotate. Through the meshing of the driven gear 28 and the active gear 26, the linkage rod 27 and the spiral fan 29 installed at its end are driven to rotate at high speed. The small-diameter driven gear 28 plays a role in speeding up the rotation. The rotation of the spiral fan 29 generates directional airflow, which sweeps the emission surface of the ultrasonic detector 6 directly below. This realizes the splitting and coordinated driving of power. There is no need to configure a separate motor and drive circuit for the cleaning function, which greatly simplifies the structure, reduces cost and power consumption, and maintains the stability and accuracy of non-contact measurement for long-term operation.

[0049] The detection method includes the following steps:

[0050] Step 1: Benchmark calibration. The controller 101 starts the system self-test to confirm the status of each sensor and actuator. Then, it controls the servo motor 18 to drive the drive rod 9 to rotate, releasing the pull wire 11 wound on the storage cylinder 10. The counterweight 12 sinks under the action of gravity, driving the chain composed of multi-section hinged auxiliary cylinders 15 and the float 16 to be lowered vertically into the water. At the same time, the controller 101 reads the data of the level instrument 7 and drives the electric push rod 402 in the drive adjustment component 4 to extend and retract, driving the detector seat 5 to rotate around the rotation axis 403. Using the guiding action of the slide 404 and the guide slider 405, the emitting surface of the ultrasonic detector 6 is finally automatically adjusted to a horizontal state, completing the automatic calibration of the measurement benchmark.

[0051] Step 2: Water level detection. After the linkage detection mechanism 8 is lowered into place, the electric clamp 20 is activated to close and lock the auxiliary cylinder 15 at the positioning ring 19. The tension motor 23 is activated by the controller 101 to wind up the tension roller 22, thereby tensioning the pull line 11. Under the tension of the pull line 11, each hinged auxiliary cylinder 15 is straightened and aligned, thus forming a stable collimation measurement reference axis to resist water flow impact and reduce bending error. In this stable state, the ultrasonic detector 6 emits ultrasonic waves for non-contact ranging. The displacement sensor 13 measures the length of the pull line 11. The first capacitive sensor 14 and the second capacitive sensor 17 on the float 16 accurately locate the position of the float 16 through capacitive coupling signals, and jointly obtain contact water level data.

[0052] Step 3: Data fusion. The data fusion module 24 receives and processes the collected multi-source data in real time. It performs data consistency verification and filtering on the measured values ​​of the first capacitive sensor 14 and the second capacitive sensor 17 and the data detected by the ultrasonic detector 6. Then, it uses an adaptive weighted fusion algorithm to fuse the non-contact and contact measurement results, calculates the final water level value with high reliability, and sends it through the communication module 241.

[0053] Step 4: Cleaning after testing. After testing, the tension motor 23 loosens the pull wire 11, and the reverse start servo motor 18 winds up the pull wire 11. At the same time, the drive rod 9 rotates, driving the active gear 26, driven gear 28 and linkage rod 27 to rotate, causing the spiral fan 29 to rotate, and cleaning the emitting surface of the ultrasonic detector 6 with airflow to ensure the cleanliness of the signal emitting surface during measurement.

[0054] The implementation principle of this application embodiment is as follows: First, the controller 101 starts a system self-test to confirm the status of each sensor and actuator. Then, the controller controls the servo motor 18 to drive the drive rod 9 to rotate, releasing the pull line 11 wound on the storage cylinder 10. The counterweight 12 sinks under the action of gravity, driving the chain composed of multiple hinged auxiliary cylinders 15 and the float 16 to be vertically lowered into the water. At the same time, the controller 101 reads the data of the level instrument 7 and extends and retracts the electric push rod 402 in the drive adjustment assembly 4, driving the detection seat 5 to rotate around the rotation axis 403. Rotation, utilizing the guiding action of the slide groove 404 and the guide slider 405, ultimately automatically adjusts the emitting surface of the ultrasonic detector 6 to a horizontal state, completing the automatic calibration of the measurement reference. After the linkage detection mechanism 8 is lowered into place, the electric clamp 20 is activated to close and lock the auxiliary cylinder 15 at the positioning ring 19. The controller 101 starts the tensioning motor 23 to wind up the tensioning roller 22, thereby tensioning the tension cable 11. Under the tension of the tension cable 11, the hinged auxiliary cylinders 15 are straightened and aligned, thus forming a stable collimated measurement reference axis to resist water flow. Impact is reduced to minimize bending errors. Under this stable state, ultrasonic detector 6 emits ultrasonic waves for non-contact ranging. Displacement sensor 13 measures the length of the pull line 11. Capacitive sensor 14 and capacitive sensor 17 on float 16 accurately locate the position of float 16 through capacitive coupling signals, jointly obtaining contact water level data. Data fusion module 24 receives and processes the collected multi-source data in real time, performs data consistency verification and filtering on the measured values ​​of capacitive sensor 14 and capacitive sensor 17 and the data detected by ultrasonic detector 6. Subsequently, an adaptive weighted fusion algorithm is used to fuse the non-contact and contact measurement results, calculate a highly reliable final water level value, and send it through communication module 241. After detection, tension motor 23 loosens the pull line 11, and reverse start servo motor 18 winds up the pull line 11. The drive rod 9 rotates while driving the active gear 26, driven gear 28, and linkage rod 27 to rotate, causing the spiral fan 29 to rotate and clean the airflow on the emitting surface of ultrasonic detector 6, ensuring the cleanliness of the signal emitting surface during measurement.

[0055] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A smart water level detection device, comprising a base (1), characterized in that: A support column (2) is fixedly connected to the top side of the base (1), a side frame (3) is fixedly connected to the top side of the support column (2), a probe seat (5) is connected to one side of the side frame (3) through an adjustment component (4), an ultrasonic detector (6) is fixedly connected to the bottom end of the probe seat (5), a level (7) is installed on one side of the ultrasonic detector (6), a linkage detection mechanism (8) is fixedly connected to the bottom side of the probe seat (5), and a controller (101) is provided on one side of the base (1).

2. The intelligent water level detection device according to claim 1, characterized in that: The adjustment assembly (4) includes a fixed frame (401), an electric push rod (402), a rotating shaft (403), a slide groove (404), and a guide slider (405). The fixed frame (401) is fixedly connected to the end of the side frame (3). One side of the fixed frame (401) is hinged to the probe seat (5) through the rotating shaft (403). The electric push rod (402) is fixedly connected to the top side of the fixed frame (401). A slide groove (404) is provided on the outer wall of one side of the probe seat (5). The guide slider (405) is slidably connected inside the slide groove (404). The end of the electric push rod (402) is hinged to the guide slider (405) through a movable shaft.

3. The intelligent water level detection device according to claim 2, characterized in that: The linkage detection mechanism (8) includes a fixed base (81), a drive rod (9), a storage cylinder (10), a pull wire (11), a counterweight (12), a displacement sensor (13), a first capacitance sensor (14), an auxiliary cylinder (15), a float (16), and a second capacitance sensor (17). The fixed base (81) is fixedly connected to one side of the bottom of the detection base (5). The drive rod (9) is connected to the inner wall of the fixed base (81) through a bearing. The storage cylinder (10) is fixedly connected to the outer wall of the middle part of the drive rod (9). The pull wire (11) is connected around the outer wall of the storage cylinder (10). The counterweight (12) is fixedly connected to the bottom end of the pull wire (11). The displacement sensor (13) is fixedly connected inside the counterweight (12). The first capacitance sensor (14) is provided on one side of the displacement sensor (13).

4. The intelligent water level detection device according to claim 3, characterized in that: The outer wall of the pull wire (11) is fitted with an auxiliary tube (15). Multiple sets of auxiliary tubes (15) are provided and are also wound around the outer wall of the storage tube (10). Adjacent auxiliary tubes (15) are hinged together. The outer wall of the auxiliary tube (15) is fitted with a float (16). A second capacitive sensor (17) is fixedly connected to one side of the float (16). The second capacitive sensor (17) is matched with the first capacitive sensor (14).

5. The intelligent water level detection device according to claim 3, characterized in that: A servo motor (18) is fixedly connected to one side of the outer wall of the fixed base (81). The output end of the servo motor (18) is fixedly connected to the drive rod (9). A positioning ring (19) is fixedly connected to one side of the bottom of the fixed base (81). The positioning ring (19) is sleeved on the outside of the auxiliary cylinder (15), and an electric clamp (20) is provided in the middle of the positioning ring (19).

6. The intelligent water level detection device according to claim 4, characterized in that: A tensioning box (21) is fixedly connected to one side of the outer wall of the storage tube (10). The end of the pull line (11) away from the counterweight (12) passes through the storage tube (10) and extends into the tensioning box (21). A tensioning roller (22) is connected to the middle inner wall of the tensioning box (21) through a bearing. The pull line (11) is fixedly connected to the tensioning roller (22), and the pull line (11) is wound around the outer wall of the tensioning roller (22). A tensioning motor (23) is fixedly connected to the top of the tensioning box (21), and the output end of the tensioning motor (23) is connected to the tensioning roller (22).

7. The intelligent water level detection device according to claim 4, characterized in that: A data fusion module (24) is provided on one side of the controller (101), and a communication module (241) is provided on one side of the data fusion module (24). The data fusion module (24) is electrically connected to the ultrasonic detector (6), the displacement sensor (13), the first capacitive sensor (14), and the second capacitive sensor (17).

8. The intelligent water level detection device according to claim 5, characterized in that: A drive box (25) is fixedly connected to the outer wall of the fixed base (81) away from the servo motor (18). One end of the drive rod (9) extends through the fixed base (81) into the drive box (25). A drive gear (26) is fixedly connected to the end of the drive rod (9). A linkage rod (27) is connected to the inner wall of the drive box (25) through a bearing. A driven gear (28) is fixedly connected to the middle of the linkage rod (27).

9. The intelligent water level detection device according to claim 8, characterized in that: The driven gear (28) meshes with the driving gear (26), and the diameter of the driven gear (28) is smaller than that of the driving gear (26). One end of the linkage rod (27) extends through the drive box (25) to the outside, and a spiral fan (29) is fixedly connected to the end of the linkage rod (27). The spiral fan (29) is located on one side of the emitting surface of the ultrasonic detector (6).

10. A detection method for a smart water level detection device, employing the smart water level detection device according to any one of claims 1-9, characterized in that: The detection method includes the following steps: Step 1: Benchmark calibration. The controller (101) starts the system self-test to confirm the status of each sensor and actuator. Then, the controller controls the servo motor (18) to drive the drive rod (9) to rotate, releasing the pull line (11) wrapped on the storage cylinder (10). The counterweight (12) sinks under the action of gravity, driving the chain composed of multiple hinged auxiliary cylinders (15) and the float (16) to be lowered vertically into the water. At the same time, the controller (101) reads the data of the level (7) and drives the electric push rod (402) in the drive adjustment component (4) to extend and retract, driving the detector seat (5) to rotate around the rotation axis (403). Using the guiding effect of the slide groove (404) and the guide slider (405), the transmitting surface of the ultrasonic detector (6) is finally automatically adjusted to a horizontal state, completing the automatic calibration of the measurement benchmark. Step 2: Water level detection. After the linkage detection mechanism (8) is lowered into place, the electric clamp (20) is activated to close and lock the auxiliary cylinder (15) at the positioning ring (19). The tension motor (23) is activated by the controller (101) to wind up the tension roller (22), thereby tensioning the pull line (11). Under the tension of the pull line (11), each hinged auxiliary cylinder (15) is straightened and aligned, thus forming a stable collimation measurement reference axis to resist the impact of water flow and reduce bending error. In this stable state, the ultrasonic detector (6) emits ultrasonic waves for non-contact distance measurement. The length of the pull line (11) is measured by the displacement sensor (13). The first capacitor sensor (14) and the second capacitor sensor (17) on the float (16) accurately locate the position of the float (16) through the capacitive coupling signal, and jointly obtain contact water level data. Step 3: Data fusion. The data fusion module (24) receives and processes the collected multi-source data in real time. It performs data consistency verification and filtering on the measured values ​​of the first capacitive sensor (14) and the second capacitive sensor (17) and the ultrasonic detector (6). Then, it uses an adaptive weighted fusion algorithm to fuse the non-contact and contact measurement results, calculates the final water level value with high reliability, and sends it through the communication module (241). Step 4: Cleaning after inspection. After inspection, the tension motor (23) loosens the pull wire (11), and the servo motor (18) is reverse-started to wind up the pull wire (11). The drive rod (9) rotates while driving the active gear (26), driven gear (28) and linkage rod (27) to rotate, so that the spiral fan (29) rotates and the airflow cleans the emitting surface of the ultrasonic detector (6) to ensure the cleanliness of the signal emitting surface during measurement.

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