Water transparency measuring device

Abstract

The utility model relates to a device for measuring the transparency of a water body. The device comprises a saishi disk, an unmanned aerial vehicle for driving the saishi disk to fly, a camera for observing the saishi disk and a controller for controlling the unmanned aerial vehicle and the camera, rotor wings of the unmanned aerial vehicle are arranged on the side upper portions of the periphery of a vehicle body of the unmanned aerial vehicle and connected with the vehicle body through a frame body. A camera and a rotatable wire coil are fixedly connected to the machine body, a measuring rope is wound on the wire coil, the free end of the measuring rope is connected with the saybolt disc through a safety buckle, the saybolt disc is arranged below the machine body, and a lead block connected with the saybolt disc is arranged below the saybolt disc; one side of the wire coil is provided with a rotating disc rotationally connected with the machine body, the free end of the measuring rope bypasses the rotating disc and then is connected with the safety buckle, and the side, away from the machine body, of the rotating disc is fixedly connected with an angle sensor used for obtaining the accumulated rotating angle of the rotating disc.

Description

Technical Field

[0001] This utility model relates to a water transparency measuring device, belonging to the field of water measurement technology. Background Technology

[0002] Water transparency is a measure of the visibility of a water body and is one of the indispensable indicators in lake and reservoir water quality surveys. Currently, the Seiler disk method is mainly used to measure water transparency. This method involves submerging a black and white Seiler disk in the water until the white disk surface is no longer visible. The distance between the black and white Seiler disk surface and the water surface is then measured, which is the water transparency.

[0003] Chinese Patent CN214749770U discloses a mobile transparency monitoring device, including an intelligent mobile device and a water transparency monitoring device fixed below the intelligent mobile device. The water transparency monitoring device includes a protective cover, inside which are fixed a control module, an automatic line-laying device, and a monitoring device. The control module is connected to the automatic line-laying device and the monitoring device, respectively, and is connected to a mobile terminal via a communication module. A graduated pull rope is fixed inside the automatic line-laying device, extending vertically out of the protective cover. A Seymne disk is fixed to the end of the graduated pull rope, and a counterweight is fixed to the bottom of the Seymne disk. The monitoring device includes a first camera and a second camera, with the first camera aligned with the Seymne disk and the second camera aligned with the graduated pull rope. It can use a drone to move the Seymne disk to measurement locations that are inconvenient for manual access to measure water transparency. However, the airflow generated by the high-speed rotation of the drone's rotor will cause the measuring rope to rotate and create ripples on the water surface, affecting the camera's observation. Furthermore, the graduations on the graduated rope cannot be as precise as a measuring tape, which will also affect the accuracy of the transparency measurement. Utility Model Content

[0004] To overcome the above problems, this utility model provides a water transparency measuring device, which can reduce the impact of airflow generated by the high-speed rotation of the UAV rotor on the measuring rope and the water surface, and improve the accuracy of camera observation and transparency measurement.

[0005] The technical solution of this utility model is as follows:

[0006] A water transparency measuring device includes a Seymonic disk, a drone that drives the Seymonic disk, a camera that observes the Seymonic disk, and a controller that controls the drone and the camera. The rotors of the drone are located on the upper sides of its body and are connected to the body via a frame. The camera and a rotatable reel are fixedly connected to the body. A measuring rope is wound on the reel, and the free end of the measuring rope is connected to the Seymonic disk via a safety buckle. The Seymonic disk is located below the body, and a lead block is connected to the bottom of the Seymonic disk. A turntable is located on one side of the reel and is rotatably connected to the body. The free end of the measuring rope passes around the turntable and is connected to the safety buckle. An angle sensor for acquiring the cumulative rotation angle is fixedly connected to the side of the turntable away from the body. The controller controls the switching of the angle sensor and the winding of the measuring rope by the reel. When the controller controls the reel to wind the measuring rope, the measuring rope drives the turntable to rotate. The controller calculates the length of the measured rope pulled out based on the radius of the turntable and the cumulative rotation angle of the turntable.

[0007] Furthermore, the arc-shaped surface of the turntable is a friction concave surface, the shape of which is adapted to the measuring rope; the turntable is rotatably connected to the machine body through a rotating shaft, and the radius of the turntable is the distance from the inner surface of its friction concave surface to its central rotating shaft.

[0008] Furthermore, the reel and turntable are both placed inside the machine body; the free end of the measuring rope passes through the bottom of the machine body and is connected to the safety buckle; the camera is placed on the outside of the bottom of the machine body.

[0009] Furthermore, the lower part of the machine body is provided with baffles connected end to end along its perimeter, and the measuring rope is placed in the area enclosed by the baffles; one side of each baffle is fixedly connected to the bottom of the machine body, and the other side is inclined away from the measuring rope.

[0010] Furthermore, a hydraulic telescopic screw is provided between the machine body and the frame, with both ends of the hydraulic telescopic screw being fixedly connected to the machine body and the frame, respectively.

[0011] Furthermore, a positioning device is fixedly connected to the machine body.

[0012] Furthermore, the controller controls the extension and retraction of the hydraulic telescopic screw and the switching of the positioning device.

[0013] Furthermore, the Seidon disc is fixedly connected to the lead block by a screw.

[0014] Furthermore, the controller is provided with an image display area for displaying the images observed by the camera, a data display area for displaying the longitude and latitude of the detection point recorded by the positioning instrument, a data display area for displaying the cumulative rotation angle of the turntable by the angle sensor, and a data display area for displaying the length of the pulled-out measuring rope calculated by the controller.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model uses a drone to fly the Seidon disk to the required testing point. With the cooperation of the line disk and turntable, the measuring rope is stretched under the gravity of the lead block to place the Seidon disk in the water. The camera and positioning device record the situation at the testing point. At the same time, it can observe whether the boundary of the Seidon disk in the water is clear. Thus, with the cooperation of the angle sensor and controller, the water transparency at the testing point can be measured.

[0017] 2. This utility model controls the winding of the spool through a controller, which can flexibly adjust the position of the Seidon disc in the water. At the same time, it uses correction formulas and measurement formulas to improve the accuracy of water transparency measurement.

[0018] 3. This utility model increases the distance between the UAV body and the frame by using a hydraulic telescopic screw. The enclosed baffle reduces the ripples on the water surface caused by the high-speed airflow generated by the UAV's rotor rotation when hovering, as well as the swaying of the measuring rope. At the same time, it facilitates the camera's observation of the Seidon disk, thereby reducing the factors affecting the measurement of water transparency and improving the reliability of the measurement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the overall structure of the controller.

[0021] The reference numerals in the figure are as follows:

[0022] 1. Sesquirrel disc; 11. Lead block; 12. Screw; 2. UAV; 21. Rotor; 22. Airframe; 23. Frame; 24. Baffle; 3. Camera; 4. Controller; 41. Image display area; 42. Data display area; 5. Cable reel; 6. Measuring rope; 61. Safety buckle; 7. Turntable; 8. Angle sensor; 9. Hydraulic telescopic screw; 10. Positioner. Detailed Implementation

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

[0024] See Figure 1-2 A water transparency measuring device includes a Sesquiter disk 1, a drone 2 that drives the Sesquiter disk 1, and a controller 4 that controls the drone 2. The rotors 21 of the drone 2 are distributed on the upper sides of the body 22. A camera 3 and a rotatable coil 5 are fixedly connected to the body 22. A measuring rope 6 is wound on the coil 5. The free end of the measuring rope 6 is fixedly connected to the Sesquiter disk 1 through a safety buckle 61. A lead block 11 connected to the Sesquiter disk 1 through a screw 12 is provided below the Sesquiter disk 1.

[0025] Before measurement, the testers observed the water conditions at the site, such as whether there were floating objects on the lake surface and whether it was close to the shore. They selected a location near the center of the lake or where the water was clear. The controller 4 drove the drone 2 to fly and send the Seidon disk 1 to the test point. The controller 4 then controlled the reel 5 to wind up and reel in the measuring rope 6, so that the Seidon disk 1 would leave or sink into the water under the gravity of the lead block 11. The image display area 41 on the controller 4 displayed the Seidon disk 1 observed by the camera 3. The water transparency was measured by judging the boundary between the black and white areas on the Seidon disk 1 in the water.

[0026] Furthermore, the coil 5 and the measuring rope 6 are both fixedly connected inside the machine body 22, and the free end of the measuring rope 6 passes through the bottom of the machine body 22 and is connected to the safety buckle 61; the camera 3 is fixedly connected to the outside of the bottom of the machine body 22.

[0027] Furthermore, a positioning device 10 is fixedly connected to the body 22; the positioning device 10 is used to record the longitude and latitude of the detection point and display the results in the data display area 42 of the controller 4.

[0028] Furthermore, a turntable 7 is provided on one side of the coil 5 and is rotatably connected to the body 22. The turntable 7 is placed inside the body 22. The arc surface of the turntable 7 is a friction concave surface, and its shape is adapted to the measuring rope 6. An angle sensor 8 is fixedly connected to the side of the turntable 7 away from the body 22. When the turntable 7 rotates in the forward direction, the angle sensor 8 feeds back a positive value to the controller 4 of the rotation angle. When the turntable 7 rotates in the reverse direction, the angle sensor 8 feeds back a negative value to the controller 4 of the rotation angle. The free end of the measuring rope 6 passes around the turntable 7 and then through the body 22.

[0029] Controller 4 calculates the length of the pulled-out measuring rope 6 according to the measurement formula s = 2 × π × r × (α / 360) and displays the result in a value in the data display area 42 of controller 4.

[0030] s — the length of the measuring rope 6 pulled out, in cm;

[0031] r—the radius of the inner surface of the friction concave surface of turntable 7 from its central rotation axis, in cm;

[0032] α — The rotation angle of turntable 7 measured by angle sensor 8, in °.

[0033] When controller 4 controls the reel 5 to rotate forward, the measuring rope 6 is pulled out under the gravity of the Seidon disk 1 and the lead block 11, and the Seidon disk 1 descends into the water. At the same time, the measuring rope 6 drives the turntable 7 to rotate forward through friction. The angle sensor 8 accumulates the rotation angle of the turntable 7 and adds the positive values. If it is necessary to lift the Seidon disk 1, the measuring rope 6 drives the turntable 7 to rotate in the opposite direction. The angle sensor 8 accumulates the rotation angle of the turntable 7 and adds the positive and negative values. The angle sensor 8 accumulates the rotation angle of the turntable 7 and displays it on the data display area 42 of controller 4. Controller 4 calculates the length of the pulled-out measuring rope 6 based on the data fed back by the angle sensor 8.

[0034] Furthermore, the lower part of the body 22 is provided with baffles 24 connected end to end along its perimeter. The measuring rope 6 is placed in the area enclosed by the baffles 24. One side of each baffle 24 is fixedly connected to the bottom of the body 22, and the other side of the baffle 24 is inclined away from the measuring rope 6.

[0035] Furthermore, a hydraulic telescopic screw 9 is provided between the body 22 and the frame 23, and the two ends of the hydraulic telescopic screw 9 are fixedly connected to the body 22 and the frame 23 respectively.

[0036] When the UAV 2 is flying, the hydraulic telescopic screw 9 is in a retracted state to facilitate the flight of the UAV 2. When the UAV 2 flies to the detection point, the controller 4 drives the hydraulic telescopic screw 9 to extend, thereby increasing the distance between the body 22 and the frame 23, reducing the impact of the high-speed airflow generated by the UAV 2 on the water surface. At the same time, the baffle 24 can reduce the violent shaking of the measuring rope 6 caused by the high-speed airflow, and also facilitate the camera to observe the Seidon disk 1, avoiding direct sunlight on the camera, thereby improving the accuracy of the measurement.

[0037] Furthermore, the controller 4 controls the extension and retraction of the hydraulic telescopic screw 9 and the switching of the positioning device 10; wherein, the controller 4 controls the camera 3, the coil 5, the angle sensor 8, the hydraulic telescopic screw 9, and the positioning device 10 through a wireless signal receiving device.

[0038] The working principle of this utility model:

[0039] See Figure 1-2 Before use, the length of the measuring rope 6 released should be corrected for errors:

[0040] The controller 4 corrects the error of the measured length of the measuring rope 6 according to the correction formula y = kx + b, where y represents the length of the measuring rope 6 measured manually, x represents the length of the measuring rope 6 pulled out by the controller 4 according to the measurement formula, and k and b are correction coefficients with initial values ​​of k = 1 and b = 0.

[0041] The controller 4 drives the drone 2 to a certain altitude. The controller 4 then activates the reel 5 and angle sensor 8. Under the gravity of the lead block 11, the measuring rope 6 is pulled out. The controller 4 records the rotation angle of the turntable 7 at five nodes when the measuring rope 6 is pulled out: 30cm, 50cm, 100cm, 200cm, and 300cm. At the same time, the actual length of the measuring rope 6 pulled out at each node is measured manually using a tape measure. If the deviation between the length of the measuring rope 6 recorded by the controller 4 and the length of the measuring rope 6 measured manually at each node is within ±1cm, no correction is required. If the deviation exceeds this range, the length of the measuring rope 6 recorded by the controller 4 and the length of the measuring rope 6 measured manually at each node are substituted into the formula. By calculating the lengths of the five nodes, the values ​​of k and b are obtained to correct the error.

[0042] Measuring water transparency:

[0043] Once the detection point is determined, controller 4 activates camera 3 and positioning device 10, and controller 4 drives drone 2 to fly on the water surface. At this time, hydraulic telescopic screw 9 is in the retracted state.

[0044] When the UAV 2 flies to the detection point, the controller 4 controls the hydraulic telescopic screw 9 to extend, so that the body 22 descends and gets as close to the water surface as possible, reducing the impact of the airflow generated by the high-speed rotation of the UAV 2 rotor 21 on the water surface and the measuring rope 6; the positioning instrument 10 records the longitude and latitude of the detection point and feeds it back to the controller 4 and displays it in the data display area 42; the controller 4 drives the reel 5 to rotate, and the measuring rope 6 is pulled out under the gravity of the lead block 11. When the Seisch disk 1 is lowered to a position close to the water surface, the controller 4 drives the reel 5 to stop rotating.

[0045] After the camera 3 observes that there are no floating objects on the water surface, the controller 4 starts the reel 5 and angle sensor 8. The measuring rope 6 drives the turntable 7 to rotate in the forward direction through friction, causing the Seidon disc 1 to descend into the water. The camera 3 displays the black and white boundary of the Seidon disc 1 in the water through the image display area 41 of the controller 4. At the same time, the angle sensor 8 accumulates the rotation angle of the turntable 7 and feeds it back to the controller 4 and displays it in the data display area 42. The controller 4 synchronously calculates the length of the pulled-out measuring rope 6 according to the measurement formula and displays it in the data display area 42.

[0046] When the boundary between black and white on the Seidon disk 1 is unclear, the controller 4 drives the reel 5 to stop rotating and shuts off the angle sensor 8 to stop lowering the Seidon disk 1. At this time, the length of the stretched measuring rope 6 measured by the controller 4 according to the measurement formula is the water transparency for this time. Repeat the above steps 2-3 times, and obtain the water transparency based on the average of the lengths of the stretched measuring rope 6 measured multiple times.

[0047] If the position of the Seidon disk 1 needs to be adjusted by lifting it upwards during the measurement process, the controller 4 will drive the coil 5 to rotate in the opposite direction.

[0048] After the measurement is completed, the controller 4 drives the reel 5 to rotate in the opposite direction to retract the measuring rope 6, raises the Seidon disc 1 until it leaves the water, drives the hydraulic telescopic screw 9 to retract, and makes the drone 2 fly back to the shore.

[0049] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A water transparency measuring device, comprising a Seymonic disk (1), a drone (2) that drives the Seymonic disk (1) to fly, a camera (3) for observing the Seymonic disk (1), and a controller (4) for controlling the drone (2) and the camera (3); the rotors (21) of the drone (2) are respectively placed on the upper sides of its body (22) and connected to the body (22) through a frame (23); the camera (3) and a rotatable coil (5) are fixedly connected to the body (22), a measuring rope (6) is wound on the coil (5), the free end of the measuring rope (6) is connected to the Seymonic disk (1) through a safety buckle (61), the Seymonic disk (1) is placed below the body (22), and a lead block (11) connected to the Seymonic disk (1) is provided below the Seymonic disk (1), characterized in that: The coil (5) has a turntable (7) on one side that is rotatably connected to the machine body (22). The free end of the measuring rope (6) passes around the turntable (7) and is connected to the safety buckle (61). An angle sensor (8) for acquiring its cumulative rotation angle is fixedly connected to the side of the turntable (7) away from the machine body (22). The controller (4) controls the switch of the angle sensor (8) and the coil (5) to wind up the measuring rope (6). When the controller (4) controls the coil (5) to wind up the measuring rope (6), the measuring rope (6) drives the turntable (7) to rotate. The controller (4) calculates the length of the measured rope (6) that is pulled out based on the radius of the turntable (7) and the cumulative rotation angle of the turntable (7).

2. The water transparency measuring device according to claim 1, characterized in that: The arc-shaped surface of the turntable (7) is a friction concave surface, and its shape is adapted to the measuring rope (6); the turntable (7) is rotatably connected to the machine body (22) through a rotating shaft, and the radius of the turntable (7) is the distance from the inner surface of its friction concave surface to its central rotating shaft.

3. A water transparency measuring device according to claim 1 or 2, characterized in that: The coil (5) and turntable (7) are both placed inside the machine body (22); the free end of the measuring rope (6) passes through the bottom of the machine body (22) and is connected to the safety buckle (61); the camera (3) is placed on the outside of the bottom of the machine body (22).

4. The water transparency measuring device according to claim 3, characterized in that: The machine body (22) is provided with baffles (24) connected end to end along its periphery below, and the measuring rope (6) is placed in the area enclosed by the baffles (24); one side of each baffle (24) is fixedly connected to the bottom of the machine body (22), and the other side is inclined away from the measuring rope (6).

5. The water transparency measuring device according to claim 4, characterized in that: A hydraulic telescopic screw (9) is provided between the body (22) and the frame (23), and the two ends of the hydraulic telescopic screw (9) are fixedly connected to the body (22) and the frame (23) respectively.

6. The water transparency measuring device according to claim 5, characterized in that: A positioning device (10) is fixedly connected to the body (22).

7. A water transparency measuring device according to claim 6, characterized in that: The controller (4) controls the extension and retraction of the hydraulic telescopic screw (9) and the switching on / off of the positioning device (10).

8. The water transparency measuring device according to claim 7, characterized in that: The Seidon disk (1) is fixedly connected to the lead block (11) by a screw (12).

9. A water transparency measuring device according to claim 8, characterized in that: The controller (4) is provided with an image display area (41) for displaying the image observed by the camera (3), a data display area (42) for displaying the longitude and latitude of the detection point recorded by the positioning instrument (10), the rotation angle of the turntable (7) accumulated by the angle sensor (8), and the length of the pulled-out measuring rope (6) calculated by the controller (4).

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