A flow rate measuring device

Abstract

The application relates to the technical field of flow velocity detection, in particular to a flow velocity measuring device which comprises a main body assembly, the main body assembly comprises a floating plate, a waist hole is arranged in the middle position of the floating plate, a measuring assembly is fixedly installed on the lower surface of the floating plate, a control unit with a wireless communication module and a processing module is fixedly installed on one side of the upper surface of the floating plate, a stabilizing assembly is fixedly installed on the lower surface of the floating plate, and a traction assembly is fixedly installed on one end of the lower surface of the floating plate. When in use, the measuring assembly is used for measuring the transverse flow velocity in a river, and the stabilizing assembly is used for measuring the longitudinal flow velocity. When in use, the traction assembly is sunk into the riverbed to be in contact with the riverbed, so that the fixing effect of the device is achieved, the limitation of external conditions is low, and when in use, the turbine generator and the solar energy power generation panel are used to increase the endurance effect, and the control unit is used for wirelessly transmitting the measuring signal, so that the electric cable is not needed, and the use convenience effect is improved.

Description

Technical Field

[0001] This invention relates to a flow velocity measuring device, belonging to the field of flow velocity detection technology. Background Technology

[0002] Flow velocity refers to the displacement of a liquid per unit time. Particle velocity is a vector describing the direction and speed of motion of a liquid particle at a given instant. Its direction is consistent with the tangent to the particle's trajectory. Its magnitude is given by u = lim<Δt→0>Δs / Δt = ds / dt, with units of m / s, where Δs is the distance the liquid particle travels in time Δt. In modern hydraulic engineering, the flow velocity of water within rivers and canals is a crucial measurement requirement, necessitating the use of measuring devices.

[0003] For example, CN107576820A discloses a flow velocity measuring device. This device mainly involves holding a telescopic rod by hand to allow the measuring instrument to hang naturally on the water surface for measurement. However, this device is only suitable for small watersheds and can only measure at the edge of the water area. Since the flow velocity at the edge of the water area differs greatly from that in the center of the water area, the measurement is inaccurate. Furthermore, for larger water areas, the flow velocity needs to be measured in the center of the water, making this device unsuitable.

[0004] For example, CN106093460A discloses a flow velocity measuring device. This device measures three-dimensional flow velocity during use, but it is inconvenient to fix when used in a wide body of water. It is not used in reservoirs or rivers, and its applicability is relatively narrow.

[0005] In some wider rivers, or in key areas such as reservoirs and dams, it is necessary to measure the flow velocity over extended periods. Since the velocity in the water is concentrated in the middle of the river, the measuring equipment needs to be positioned in the middle of the river for a long time. Some current measuring equipment has a short battery life due to its own battery, and it requires a cable connection, which makes it inconvenient to operate. In addition, existing measuring equipment needs to be fixed on the riverbank, which is inconvenient to operate in open areas and affects the accuracy of flow velocity measurement.

[0006] In view of this, the present invention is proposed. When in use, it is convenient for continuous measurement over a long period of time, and it has strong applicability, low operating conditions, and is easy to use. Summary of the Invention

[0007] The purpose of this invention is to provide a flow velocity measuring device to solve the above-mentioned problems. It is easy to operate and can be used for continuous measurement over a long period of time. It has low external condition restrictions, strong applicability, and is convenient for measuring flow velocity.

[0008] This invention achieves the above-mentioned objective through the following technical solution: a flow velocity measuring device includes a main component, the main component including a float, and a waist hole is formed in the middle of the float. A measuring component is fixedly installed on the lower surface of the float below the waist hole, and a control unit is fixedly installed on one side of the upper surface of the float. The measuring component is electrically connected to the control unit. Notches are formed on both sides of the float, and a stabilizing component is fixedly installed on the lower surface of the float at the lower end of the notch. The stabilizing component is electrically connected to the control unit, and a traction component is fixedly installed at one end of the lower surface of the float. In use, the traction component is adjusted according to the required river depth to be measured. After adjustment, the upper end of the traction component is fixedly connected to the float, and the traction component is deployed into the river. The traction component sinks, so that the lower end of the traction component contacts the riverbed, thereby facilitating the traction of the float. Floating on the surface of the river to prevent it from drifting away, the device is secured by the traction component, eliminating the need for external fixed equipment or objects. This facilitates use in open water, reducing limitations during measurement and increasing ease of use. After traction, the lower end of the measuring component is located below the float, causing the water flow to rotate the measuring component, allowing it to measure the water velocity. The measured signal is transmitted to the control unit, where its internal processing module and wireless communication module transmit it to an external terminal for easy signal collection. Furthermore, no cables are required during use, enhancing convenience. The stabilizing component prevents the float from rotating on the river surface, improving measurement accuracy. It also facilitates the measurement of lateral flow in the river, further enhancing its applicability.

[0009] Furthermore, turbine generators are fixedly installed on both sides of the lower surface of the float plate at the opposite end of the traction assembly, and the turbine generators are located on both sides of the measuring assembly. An energy storage unit is fixedly installed on the upper surface of the float plate at the opposite side of the control unit, and the turbine generators supply power to the energy storage unit. A solar panel is fixedly installed on the upper surface of the float plate at one end of the traction assembly, and the solar panel supplies power to the energy storage unit, which in turn supplies power to the measuring assembly, the stabilizing assembly, and the control unit. A cover plate with a semi-circular structure is fixedly installed on the upper surface of the float plate above the waist hole, and the cover plate seals the upper end of the waist hole. The upper end of the measuring assembly passes through the waist hole and extends into the interior of the cover plate. An auxiliary connecting ring is fixedly installed on the upper surface of the float plate at the middle position of the solar panel, and the upper end of the auxiliary connecting ring extends above the solar panel. The lower surface of the float plate is located at the... Traction rings are fixedly installed on both sides of the lower end of the solar panel. One end of the traction component is fixedly installed on the traction ring. During use, the flow of water in the river drives the turbine generator to generate electricity. The solar panel converts sunlight into electricity during the day and stores it inside the energy storage unit. The energy storage unit then powers the electrical components in the device, increasing its range and facilitating use during long-term measurements. This results in a linear distribution of measurement results, making it convenient for later use. During use, the cover plate covers the area above the waist hole, and the upper end of the measuring component is located inside the cover plate to prevent external wind from affecting the measurement results, improving measurement accuracy. When retrieval or placement, the auxiliary connecting ring facilitates placement and retrieval of the device, making connection and use convenient. When fixing, the traction rings on both sides improve stability during traction and fixation, making it convenient to use.

[0010] Furthermore, the measuring component includes mounting ears, which are fixedly mounted on the lower surface of the float plate at the midpoint of both sides of the waist hole. A rotating shaft is rotatably mounted in the middle of the mounting ear, and a rotating wheel is fixedly mounted in the middle of the rotating shaft. Blades are uniformly rotatably mounted on the rotating wheel. Speed ​​detectors are fixedly mounted on both sides of the mounting ear and are fixedly connected to the lower surface of the float plate. The speed detectors are electrically connected to the control unit. Rotating seats are fixedly mounted in a circumferential array on the outer surface of the rotating wheel, and an adjusting shaft is rotatably mounted inside the rotating seats. The blades are fixedly mounted on the adjusting shaft and have an arc-shaped structure. Both ends of the adjusting shaft extend to the outer sides of the rotating seats. The rotating seat has damping rings fixedly installed on both sides, and both ends of the adjusting shaft are located inside the damping rings. In use, by rotating the blades, the adjusting shaft rotates on the rotating seat and inside the damping rings, which facilitates fixing after adjustment. When not in use, the blades can be easily stored outside the rotating wheel for convenient storage. In use, the water flow impacts the blades, causing them to drive the rotating wheel to rotate, which in turn causes the rotating shaft to rotate. The speed detector detects the speed of the rotating shaft, and the processing module inside the control unit calculates the flow velocity of the water flow based on the speed to obtain the river flow rate, which is convenient for measurement and use.

[0011] Furthermore, the stabilizing component includes a fixing base, which is fixedly pressed against the lower surface of the float plate at both ends of the notch. A mounting shaft is rotatably mounted between the fixing bases, and a stabilizing plate is fixedly mounted on the mounting shaft. The lower end of the stabilizing plate has a right-angled trapezoidal structure, and the upper end of the stabilizing plate extends into the interior of the notch. An airbag bulb is fixedly mounted on the upper end of the stabilizing plate, located inside the notch. An inflation / deflation port is fixedly mounted on the upper end of the airbag bulb. An angle detector is fixedly mounted on one side of the fixing base, and the detection end of the angle detector is fixedly connected to the mounting shaft. The upper end of the angle detector is fixedly connected to the lower surface of the float plate. The angle detector is connected to the control unit. Electrically connected, in use, the airbags are inflated through the inflation / deflation ports to increase the buoyancy of the device. The airbags are distributed on both sides of the float plate, further increasing stability during measurement. The stabilizing plate prevents the float plate from spinning on the water surface. When there is lateral flow in the water, the water flow pushes the stabilizing plate, causing the stabilizing plate to rotate the mounting shaft on the fixed base. The angle detector detects the rotation angle of the mounting shaft, facilitating the measurement of the water flow velocity in the lateral direction. The angle detector also helps determine whether the stabilizing plate is in a vertical position, thus determining the state of the float plate on the water surface. This allows for remote assessment of the device's measurement status and convenient use.

[0012] Furthermore, the traction assembly includes a traction rope and counterweights. The two ends of the traction rope are fixedly mounted on the traction rings on both sides. The traction rope has a V-shaped structure. An adjusting rope is fixedly mounted in the middle of the traction rope. The counterweights have a right-angled trapezoidal structure and are distributed circumferentially. A mounting plate is fixedly mounted above the counterweights. Mounting brackets are fixedly mounted on both sides of the upper surface of the mounting plate. A winding wheel is rotatably mounted in the middle of the mounting bracket. The other end of the adjusting rope is wound around the winding wheel. Handwheels are fixedly mounted on both sides of the winding wheel. The handwheels have a frustum-shaped structure. A pin hole is provided at the lower end of the mounting bracket, and a pin is inserted between the pin holes. The pin passes through the handwheel. The other end of the rod is threaded with a limiting nut. One side of the limiting nut is pressed against one side of the mounting bracket. During adjustment, the handwheel is used to rotate the winding wheel, which facilitates winding the adjusting rope onto the winding wheel. This allows for easy adjustment of the distance between the counterweight and the float, making it suitable for use in rivers of different depths. After adjustment, the pin is inserted into the pin hole and fixed with the limiting nut, thus fixing the handwheel and preventing the winding wheel from rotating. This allows for fixing the reserved length of the adjusting rope. After fixing, the counterweight is submerged to the bottom, making it contact the riverbed for easy fixation and use.

[0013] The technical effects and advantages of this invention are as follows: In use, the transverse flow velocity in the river is measured by the measuring component, and the longitudinal flow velocity is measured by the stabilizing component. In use, the traction component is sunk to the bottom of the water and contacts the riverbed to achieve the fixing effect of the device. It has low restrictions on external conditions. In use, the turbine generator and solar power panel increase the endurance. The measurement signal is wirelessly transmitted through the control unit, eliminating the need for connecting cables and improving the ease of use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle;

[0016] Figure 3 This is a schematic diagram of the structure after removing the traction component in this invention;

[0017] Figure 4 This is a schematic diagram of the structure from another angle after the traction component is removed in this invention;

[0018] Figure 5 This is a schematic diagram of the main components in this invention;

[0019] Figure 6 This is a schematic diagram of the measuring component in this invention;

[0020] Figure 7 This is a schematic diagram of the stabilizing component in this invention;

[0021] Figure 8 This is a schematic diagram of the traction component in this invention;

[0022] Figure 9 This is a partial structural schematic diagram of the traction component in this invention;

[0023] Figure 10 This is a topological diagram of the present invention;

[0024] In the diagram: 1. Main component; 101. Float; 102. Waist hole; 103. Control unit; 104. Notch; 105. Turbine generator; 106. Energy storage unit; 107. Solar panel; 108. Cover plate; 109. Auxiliary connecting ring; 1010. Traction ring; 2. Measuring component; 201. Mounting ear; 202. Rotating shaft; 203. Rotating wheel; 204. Blade; 205. Speed ​​detector; 206. Rotating seat; 207. 208. Adjusting shaft; 3. Damping ring; 4. Stabilizing assembly; 5. Fixing base; 6. Mounting shaft; 7. Stabilizing plate; 8. Airbag bulb; 9. Inflation / depression port; 10. Angle detector; 21. Traction assembly; 22. Traction rope; 33. Counterweight; 44. Adjusting rope; 55. Mounting bracket; 6. Winding reel; 7. Handwheel; 8. Pin hole; 9. Pin rod; 10. Limit nut. Detailed Implementation

[0025] The device of the present invention will now be clearly and completely described in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-10As shown in the embodiments of this application, a flow rate measuring device includes a main component 1, which includes a float 101. A waist hole 102 is provided in the middle of the float 101. A measuring component 2 is fixedly installed on the lower surface of the float 101 below the waist hole 102. A control unit 103 with a wireless communication module and a processing module is fixedly installed on one side of the upper surface of the float 101. The measuring component 2 is electrically connected to the control unit 103. Notches 104 are provided on both sides of the float 101. A stabilizing component 3 is fixedly installed on the lower surface of the float 101 at the lower end of the notch 104. The stabilizing component 3 is electrically connected to the control unit 103. A traction component 4 is fixedly installed at one end of the lower surface of the float 101.

[0027] Specifically, during use, the traction component 4 is adjusted according to the required river depth. After adjustment, the upper end of the traction component 4 is fixedly connected to the float 101, and the traction component 4 is dropped into the river. The traction component 4 sinks, so that the lower end of the traction component 4 contacts the riverbed, which facilitates the traction of the float 101, allowing the float 101 to float on the surface of the river and preventing it from drifting away. The device is then fixed by the traction component 4, without the need for external fixed equipment or objects in the river. This makes it easy to use in open water, reduces the limitations of measurement conditions, and increases the convenience of use.

[0028] Furthermore, after traction, since the lower end of the measuring component 2 is located under the float 101, the water flow in the river causes the measuring component 2 to rotate, allowing the measuring component 2 to measure the flow velocity of the water. The measured signal is transmitted to the control unit 103, and through the processing module and wireless communication module inside the control unit 103, the measured signal is transmitted to an external terminal, which facilitates the collection of the measured signal. In use, no cable connection is required, improving the convenience of measurement. In use, the stabilizing component 3 prevents the float 101 from rotating on the surface of the river, improving the accuracy of the measurement. The stabilizing component 3 also facilitates the measurement of lateral flow in the river, improving the applicability of use.

[0029] In one embodiment of this application, turbine generators 105 are fixedly installed on both sides of the lower surface of the float 101, opposite to the traction assembly 4, and the turbine generators 105 are located on both sides of the measuring assembly 2. An energy storage unit 106 with an inverter and a charging protector is fixedly installed on the upper surface of the float 101, opposite to the control unit 103, and the turbine generators 105 supply power to the energy storage unit 106. A solar panel 107 is fixedly installed on the upper surface of the float 101, at one end of the traction assembly 4, and the solar panel 107 supplies power to the energy storage unit 106. The energy storage unit 106 also supplies power to the measuring assembly 2, the stabilizing assembly 3, and the control unit 103. A cover plate 108 is fixedly installed on the upper surface of the float plate 101 above the waist hole 102. The cover plate 108 has a semi-circular structure and seals the upper end of the waist hole 102. The upper end of the measuring component 2 passes through the waist hole 102 and extends into the interior of the cover plate 108. An auxiliary connecting ring 109 is fixedly installed on the upper surface of the float plate 101 at the middle position of the solar power panel 107. The upper end of the auxiliary connecting ring 109 extends above the solar power panel 107. Traction rings 1010 are fixedly installed on both sides of the lower end of the float plate 101 at the lower end of the solar power panel 107. One end of the traction component 4 is fixedly installed on the traction ring 1010.

[0030] Specifically, during use, the flow of water in the river drives the turbine generator 105 to generate electricity. When there is sunlight during the day, the solar panel 107 converts the light energy into electrical energy and stores it inside the energy storage unit 106. The energy storage unit 106 then powers the electrical components in the device, increasing its endurance and facilitating its use during long-term measurements, thus making it convenient for future use.

[0031] In use, the cover plate 108 covers the area above the waist hole 102, and the upper end of the measuring component 2 is located inside the cover plate 108 to avoid the influence of external wind on the measurement results, thereby improving the accuracy of the measurement. When retrieval or placement, the auxiliary connecting ring 109 facilitates the placement and retrieval of the device, making it easy to connect and use. When fixing, the traction rings 1010 on both sides improve the stability during traction and fixation, making it convenient to use.

[0032] In one embodiment of this application, the measuring component 2 includes a mounting ear 201, which is fixedly mounted on the lower surface of the float 101 at the midpoint between the two sides of the waist hole 102. A rotating shaft 202 is rotatably mounted in the middle of the mounting ear 201, and a rotating wheel 203 is fixedly mounted in the middle of the rotating shaft 202. Blades 204 are uniformly rotatably mounted on the rotating wheel 203. Speed ​​detectors 205 are fixedly mounted on both sides of the mounting ear 201, and the speed detectors 205 are fixedly connected to the lower surface of the float 101. The speed detectors 205 are electrically connected to the control unit 103. Rotating seats 206 are fixedly mounted in a circumferential array on the outer surface of the rotating wheel 203. An adjusting shaft 207 is rotatably mounted inside the rotating base 206. A blade 204 is fixedly mounted on the adjusting shaft 207, and the blade 204 has an arc-shaped structure. Both ends of the adjusting shaft 207 extend to the outer sides of the rotating base 206, and damping rings 208 are fixedly mounted on both sides of the rotating base 206. Both ends of the adjusting shaft 207 are located inside the damping rings 208. In use, rotating the blade 204 causes the adjusting shaft 207 to rotate on the rotating base 206, and also causes the adjusting shaft 207 to rotate inside the damping rings 208. This facilitates fixing after adjustment and allows the blade 204 to be easily stored outside the rotating wheel 203 when not in use. ；

[0033] In addition, combined with photos Figure 6 As can be seen, the rotating seat 206 has an L-shaped slot at the position where the adjusting shaft 207 is installed. When in use, the water flow pushes the blades 204, causing the rotating wheel 203 to rotate. The damping ring 208 is set to prevent the blades 204 from unfolding on their own when they are being retracted. When facing the water flow, the damping ring 208 is not under force, so the blades 204 will not retract on their own under the action of turbulence.

[0034] Specifically, during use, the water flow impacts the blade 204, causing the blade 204 to drive the rotating wheel 203 to rotate, which in turn causes the rotating shaft 202 to rotate. The speed detector 205 detects the speed of the rotating shaft 202, and the processing module inside the control unit 103 calculates the flow velocity of the water flow based on the speed to obtain the flow velocity of the river, which is convenient for measurement and use.

[0035] In one embodiment of this application, the stabilizing component 3 includes a fixing seat 301, which is fixedly pressed onto the lower surface of the float 101 at both ends of the notch 104. A mounting shaft 302 is rotatably mounted between the fixing seats 301, and a stabilizing plate 303 is fixedly mounted on the mounting shaft 302. The lower end of the stabilizing plate 303 has a right-angled trapezoidal structure, and the upper end of the stabilizing plate 303 extends into the interior of the notch 104. An airbag ball 304 is fixedly mounted on the upper end of the stabilizing plate 303. The airbag ball 304 is located inside the notch 104, and an inflation / deflation port 305 is fixedly mounted on the upper end of the airbag ball 304. An angle detector 306 is fixedly mounted on one side of the fixing seat 301, and the detection end of the angle detector 306 is fixedly connected to the mounting shaft 302. The upper end of the angle detector 306 is fixedly connected to the lower surface of the float 101, and the angle detector 306 is electrically connected to the control unit 103.

[0036] Specifically, the airbag 304 is inflated through the inflation / deflation port 305 to increase the buoyancy of the device. The airbag 304 is distributed on both sides of the float 101, further increasing stability during measurement. The stabilizing plate 303 prevents the float 101 from spinning on the water surface. Furthermore, the two stabilizing plates 303 prevent the water flow passing through the middle from splitting to the sides, improving the scientific accuracy and stability of the water flow velocity measurement. When there is lateral flow in the water, the water flow pushes the stabilizing plate 303, causing the stabilizing plate 303 to rotate the mounting shaft 302 on the fixed base 301. The angle detector 306 detects the rotation angle of the mounting shaft 302, facilitating the measurement of the water flow velocity in the lateral direction. The angle detector 306 also helps determine whether the stabilizing plate 303 is in a vertical position, thus determining the state of the float 101 on the water surface. This allows for remote assessment of the device's measurement status and facilitates its use.

[0037] In one embodiment of this application, the traction assembly 4 includes a traction rope 401 and a counterweight 402. The two ends of the traction rope 401 are respectively fixedly mounted on traction rings 1010 on both sides. The traction rope 401 has a V-shaped structure. An adjusting rope 403 is fixedly mounted in the middle of the traction rope 401. The counterweight 402 has a right-angled trapezoidal structure and is circumferentially distributed among itself. A mounting plate 404 is fixedly mounted above the counterweights 402, and mounting brackets 40 are fixedly mounted on both sides of the upper surface of the mounting plate 404. 5. A winding wheel 406 is rotatably mounted in the middle of the mounting frame 405. The other end of the adjusting rope 403 is wound around the winding wheel 406. Handwheels 407 are fixedly mounted on both sides of the winding wheel 406, and the handwheels 407 are frustum-shaped. A pin hole 408 is opened at the lower end of the mounting frame 405, and a pin 409 is inserted between the pin holes 408. The pin 409 passes through the handwheel 407, and the other end of the pin 409 is threadedly connected to a limit nut 4010. One side of the limit nut 4010 is pressed against one side of the mounting frame 405.

[0038] Specifically, during adjustment, the handwheel 407 is used to rotate the winding wheel 406, which facilitates the winding of the adjusting rope 403 onto the winding wheel 406. This allows for adjustment of the distance between the counterweight 402 and the float 101, making it suitable for use in rivers of varying depths. After adjustment, the pin 409 is inserted into the pin hole 408 and secured with the limit nut 4010, thus fixing the handwheel 407 and preventing the winding wheel 406 from rotating. This also allows for fixing the reserved length of the adjusting rope 403. After fixing, the counterweight 402 is submerged to the bottom, making it contact with the riverbed. Since the multiple counterweights 402 form a right-angled trapezoidal structure, they sink downwards after contacting the riverbed. No matter which direction the adjusting rope 403 pulls on the counterweights 402, they will not easily detach from the riverbed, facilitating the fixation of the device and making it convenient to use.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flow velocity measuring device, characterized in that, The system includes a main component (1), which includes a float (101). A waist hole (102) is provided in the middle of the float (101). A measuring component (2) is fixedly installed on the lower surface of the float (101) below the waist hole (102). A control unit (103) is fixedly installed on one side of the upper surface of the float (101). The measuring component (2) is electrically connected to the control unit (103). Notches (104) are provided on both sides of the float (101). A stabilizing component (3) is fixedly installed on the lower surface of the float (101) at the lower end of the notch (104). The stabilizing component (3) is electrically connected to the control unit (103). A traction component (4) is fixedly installed on one end of the lower surface of the float (101). The stabilizing component (3) includes a fixing base (301), which is fixedly installed on the lower surface of the float (101) at both ends of the notch (104); the lower end of the stabilizing plate (303) is a right-angled trapezoidal structure, the upper end of the stabilizing plate (303) extends into the interior of the notch (104), and an airbag ball (304) is fixedly installed on the upper end of the stabilizing plate (303), which is located inside the notch (104); A mounting shaft (302) is rotatably mounted between the fixed bases (301), and a stabilizing plate (303) is fixedly mounted on the mounting shaft (302); an inflation / deflation port (305) is fixedly mounted on the upper end of the airbag bulb (304); an angle detector (306) is fixedly mounted on one side of the fixed base (301), the detection end of the angle detector (306) is fixedly connected to the mounting shaft (302), the upper end of the angle detector (306) is fixedly connected to the lower surface of the float plate (101), and the angle detector (306) is electrically connected to the control unit (103); The measuring component (2) includes a mounting ear (201), which is fixedly mounted on the lower surface of the float (101) at the middle position on both sides of the waist hole (102); a rotating shaft (202) is rotatably mounted in the middle of the mounting ear (201), and a rotating wheel (203) is fixedly mounted in the middle position of the rotating shaft (202), with blades (204) evenly rotatably mounted on the rotating wheel (203); a speed detector (205) is fixedly mounted on both sides of the mounting ear (201), and the speed detector (205) is fixedly connected to the lower surface of the float (101), and electrically connected to the control unit (103), and the speed detector (205) is used to detect the speed of the rotating shaft (202); Rotating seats (206) are fixedly mounted in a circular array on the outer surface of the rotating wheel (203). An adjusting shaft (207) is rotatably mounted inside the rotating seat (206). The blade (204) is fixedly mounted on the adjusting shaft (207) and has an arc-shaped structure. Both ends of the adjusting shaft (207) extend to the outside of both sides of the rotating seat (206). Damping rings (208) are fixedly mounted on both sides of the rotating seat (206). Both ends of the adjusting shaft (207) are located inside the damping rings (208).

2. The flow velocity measuring device according to claim 1, characterized in that, Turbine generators (105) are fixedly installed on both sides of the lower surface of the float (101) at the opposite end of the traction assembly (4), and the turbine generators (105) are located on both sides of the measuring assembly (2); an energy storage unit (106) is fixedly installed on the upper surface of the float (101) at the opposite side of the control unit (103), and the turbine generators (105) are electrically connected to the energy storage unit (106); a solar panel (107) is fixedly installed on the upper surface of the float (101) at one end of the traction assembly (4), and the solar panel (107) is electrically connected to the energy storage unit (106); the energy storage unit (106) is electrically connected to the measuring assembly (2), the stabilizing assembly (3), and the control unit (103).

3. The flow velocity measuring device according to claim 2, characterized in that, A cover plate (108) is fixedly installed on the upper surface of the float plate (101) above the waist hole (102). The cover plate (108) has a semi-circular structure and seals the upper end of the waist hole (102). The upper end of the measuring component (2) passes through the waist hole (102) and extends into the interior of the cover plate (108). An auxiliary connecting ring (109) is fixedly installed on the upper surface of the float plate (101) at the middle position of the solar power generation panel (107). The upper end of the auxiliary connecting ring (109) extends to the top of the solar power generation panel (107). Traction rings (1010) are fixedly installed on both sides of the lower end of the float plate (101) on both sides of the lower end of the solar power generation panel (107). One end of the traction component (4) is fixedly installed on the traction ring (1010).

4. The flow velocity measuring device according to claim 3, characterized in that, The traction assembly (4) includes a traction rope (401) and a counterweight (402). The two ends of the traction rope (401) are fixedly installed on the traction rings (1010) on both sides. The traction rope (401) has a V-shaped structure. An adjusting rope (403) is fixedly installed in the middle of the traction rope (401). The counterweight (402) has a right-angled trapezoidal structure. The counterweights (402) are distributed circumferentially. An mounting plate (404) is fixedly installed above the counterweights (402). Mounting brackets (405) are fixedly installed on both sides of the upper surface of the mounting plate (404). A winding wheel (406) is rotatably installed in the middle of the mounting bracket (405). The other end of the adjusting rope (403) is wound around the winding wheel (406).

5. The flow velocity measuring device according to claim 4, characterized in that, Handwheels (407) are fixedly installed on both sides of the winding reel (406), and the handwheels (407) are frustum-shaped. The lower end of the mounting bracket (405) is provided with pin holes (408), and a pin (409) is inserted between the pin holes (408). The pin (409) passes through the handwheel (407), and the other end of the pin (409) is threadedly connected to a limit nut (4010). One side of the limit nut (4010) is pressed against one side of the mounting bracket (405).

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