Equipped with a three-bladed tail fin assembly for slow-flow water and its hydroelectric power generation device and system

Abstract

This invention relates to a three-bladed tail fin assembly with low-speed water flow and its hydroelectric power generation device and system, which solves the problem of the environmental unfriendliness of existing micro-hydroelectric power generation systems. It includes a three-bladed tail fin assembly; a water tank with a space for pivotally connecting the three-bladed tail fin assembly; a top frame mounted on the top of the water tank, with two wing frames on both sides of the top frame; and a generator unit mounted within the top frame and coupled to the front or rear end of the drive shaft of the three-bladed tail fin assembly. In other words, this invention provides an underwater power generation system suitable for low-speed water flow environments, breaking through the limitations of traditional hydroelectric power generation on water flow speed, and possessing advantages such as high efficiency, strong adaptability, low cost, and long-term stable operation.

Description

Technical Field

[0001] This invention relates to the technical field of green energy, and more particularly to the technical field of micro-hydropower generation. Prior Technology

[0002] Currently, traditional micro-hydropower systems primarily rely on high water level differences or high-speed water flow to drive the turbine's water potential energy, or employ off-trough turbine generators (https: / / tech.ardswc.gov.tw / EPaper / Home / EPaper?PaperID=d3896330-5749-41d0-99b5-7ef703709d7d). However, these aforementioned traditional micro-hydropower technologies and systems often have adverse environmental impacts, such as requiring extensive land development, which damages soil and water conservation and harms aquatic ecosystems.

[0003] Therefore, there is a great need for a more environmentally friendly and aquatic ecosystem-friendly micro-hydropower generator set and modular equipment, as well as easy-to-construct trough-type Archimedes three-blade hydropower technology, which can reduce the impact on the natural environment and improve the convenience of installation and maintenance. Summary of the Invention

[0004] Therefore, considering the problems existing in conventional hydroelectric power generation systems, the inventors have devoted themselves to developing this invention. The primary objective of this invention is to provide a hydroelectric power generation device and system with a three-bladed tail fin assembly designed for slow-moving water flow, which is environmentally friendly, promotes aquatic ecology, and improves power generation efficiency. A secondary objective is to provide a hydroelectric power generation device and / or system that is easy to install and maintain. A further objective is to provide a hydroelectric power generation system that allows for adjusting the height of the hydroelectric power generation device located within the channel according to the water level.

[0005] To achieve the above objectives, the present invention employs the following technical means regarding a wave generator unit: a three-bladed tail fin assembly comprising: a drive shaft having two pivots at its front and rear ends and a central axis; three Archimedes blades spirally connected to the periphery between the front and rear ends of the drive shaft; and three tail fins connected to the outer edges of the three Archimedes blades.

[0006] The front ends of the three Archimedes blades extend obliquely toward the central axis to form a tip, and the tip accounts for 1 / 3 of the total length of the three Archimedes blades. That is, the first 1 / 3 section is just a blade, while the latter 2 / 3 section is composed of the three Archimedes blades and three tail fins.

[0007] The present invention relates to a hydroelectric power generation device that uses the aforementioned three-bladed tail fin assembly, comprising: the three-bladed tail fin assembly; a water tank having an accommodating space, with an inlet and an outlet formed at the front and rear of the accommodating space, and two pivots extending from the inlet and the outlet, wherein the two pivots provide pivotal connections to two pivot rods provided at both ends of the three-bladed tail fin assembly; a top frame mounted on the top of the water tank, with two wing frames provided on both sides of the top frame; and a generator unit mounted within the top frame and coupled to the front or rear end of the drive shaft provided by the three-bladed tail fin assembly.

[0008] The inlet of the water tank is provided with two sloping plates in the shape of a trumpet; the water tank is a long cubic frame with a side plate attached to each side of the frame, and the top and bottom of the frame are hollowed out.

[0009] The generator unit and the three-bladed tail fin assembly are sequentially connected to each other by a high-torque low-speed transmission unit and a low-torque high-speed transmission unit.

[0010] The high-torque, low-speed transmission unit is configured as two interconnected gear chain groups, while the low-torque, high-speed transmission unit is configured as two interconnected speed increasers.

[0011] The present invention relates to a hydroelectric power generation system, which uses the aforementioned hydroelectric power generation device, comprising: the hydroelectric power generation device; a support frame, which has at least two legs connected to a number of connecting holes in the top frame and the two wings of the water tank, and then spans across the two sides of the channel; and a lifting device, which is fixed to the support frame and drives the hydroelectric power generation device to move up and down relative to the depth of the channel.

[0012] Several hydroelectric power generation devices are installed in series, in parallel, or in series-parallel configurations, depending on the hydrological conditions of the canal's location.

[0013] The lifting device is mounted on the support and extends outward with a rope connected to the hydroelectric power generation device.

[0014] It also includes an ultrasonic water level gauge to detect the water level in the channel, allowing the lifting device to automatically drive the lifting of the hydroelectric power generation device based on the water level data from the ultrasonic water level gauge.

[0015] By employing the aforementioned technical means, the present invention can achieve the following effects:

[0016] 1. The present invention increases the transmission shaft with a single blade to a three-bladed transmission shaft, and the tail fin on its outer edge can avoid the generation of eddies, so as to fully capture the kinetic energy of micro-fluids in water, thereby improving the energy conversion efficiency of micro-hydraulic power and maximizing the utilization of water kinetic energy.

[0017] 2. The present invention is an innovative technology that connects the funnel mouth, using the two inclined plates to guide the slow water flow in the channel into the water tank, thereby increasing the flow rate and water pressure of the slow water flow, so as to improve the kinetic energy conversion efficiency and further enhance the power generation efficiency.

[0018] 3. This invention utilizes an innovative physical technology that converts low-speed, high-torque energy into the high-speed, low-torque energy required by the generator unit. This innovative design of the Archimedes three-bladed drive shaft, which captures fluid kinetic energy, conforms to the law of conservation of energy, thereby converting kinetic energy from water into kinetic energy for the generator unit and improving power generation efficiency.

[0019] 4. In this invention, the speed increasers are installed above the water tank. Through the design of the large gear disk driving the small gear disk, the rotational speed of the generator unit is increased to achieve the rated power, ensuring stable power output.

[0020] 5. The coupling transmission mechanism between the drive shaft and the generator unit, which is partially submerged in water, is designed in this invention to efficiently convert energy into high-speed output through its low-speed, high-torque transmission mechanism in a slow-flow environment, thereby improving power generation efficiency.

[0021] 6. The generator unit of this invention can be a generator with a permanent magnet stator that does not work, thereby reducing energy loss and improving power generation efficiency, and ensuring long-term stable operation.

[0022] 7. In a trough-type hydroelectric power generation system, the present invention allows for the parallel, series, or series-parallel connection of several generator units to improve power generation efficiency and flexibility of application. In addition, multiple generator units can be configured to operate in series, parallel, or series-parallel connection according to the needs of several different channels, so that the device capacity can form a huge power grid comparable to wind turbine generator sets.

[0023] 8. This invention utilizes its lifting device and flood control equipment to allow the system to be fixed in a channel and the lifting of the drive shaft to be adjusted according to water depth. This allows the water level to be adjusted so that the lower blades remain submerged while the upper blades are not submerged, maintaining optimal driving power. Furthermore, the lifting structure integrates flood control equipment, automatically lifting the system away from the channel during periods of high water levels, preventing blockage of the channel flow and ensuring the system's safe operation. Simple Explanation of the Diagram

[0024] [Figure 1] A perspective view of the three-bladed tail fin assembly of the present invention. [Figure 2] Side view of the invention with respect to its three-bladed tail fin assembly. [Figure 3] End view of the invention with respect to its three-bladed tail fin assembly. [Figure 4] Another embodiment of the present invention with respect to its three-bladed tail fin assembly. [Figure 5] A perspective view of the present invention regarding its hydroelectric power generation device and system. [Figure 6] An exploded perspective view of the present invention relating to its hydroelectric power generation device and system. [Figure 7] A schematic diagram of the use of the hydroelectric power generation device and system of the present invention. [Figure 8] A side sectional view of the present invention relating to its hydroelectric power generation device and system. [Figure 9] A partial enlarged view of the present invention with respect to Figure 8. [Figure 10] Top view of the present invention with respect to its hydroelectric power generation device and system. [Figure 11] Schematic diagram of the operation of the lifting device of the present invention. Implementation

[0025] This invention relates to a three-bladed tail fin assembly with slow water flow and its hydroelectric power generation device and system, as shown in Figures 1 and 7. It can provide a slow water flow environment for micro-hydroelectric power generation, such as: agricultural irrigation channels, hydroelectric tailwater, nuclear power plant cooling discharge channels, wastewater treatment plant discharge channels, riverbanks, waterways in water purification plants, or any other waterways or channels with water flow 8; wherein the three-bladed tail fin assembly A includes: a drive shaft 1 and three Archimedes blades 2; the above components are described in conjunction with the drawings below.

[0026] As shown in Figure 2, the drive shaft 1 has a central axis 10, and its front end 11 and rear end 12 are provided with two pivot rods 13 for pivot connection.

[0027] The three Archimedes blades 2 are spirally connected to the outer periphery between the front end 11 and the rear end 12 of the drive shaft 1. Three tail fins 21 are attached to the outer edge 20 of the three Archimedes blades 2, forming an L-shaped cross-section. These tail fins 21 prevent the generation of eddies that could interfere with the slow water flow driving the rotation of the three Archimedes blades 2. Referring to Figure 3, the front ends of the three Archimedes blades 2 extend obliquely towards the central axis 10 to form a tip 22. This tip 22 occupies 1 / 3 of the overall length of the three Archimedes blades 2; that is, the first 1 / 3 is simply a blade, while the latter 2 / 3 consists of the three Archimedes blades 2 and the three tail fins 21. However, the tip 22 is not a necessary component of this invention. As shown in Figure 4, the tip 22 can be omitted without affecting the invention's ability to improve power generation efficiency.

[0028] Therefore, the three-bladed tail fin assembly A of the present invention provides a preferred solution for a water flow fan blade used in micro-hydropower generation. The main feature is that the three-bladed tail fin assembly A is placed in water, preferably with the part above the central axis 10 exposed on the water surface, while the part below the central axis 10 is submerged in the water. This allows the slow water flow 9 (1.7m / s~2.2m / s) in the channel 8 to rotate by impacting the three Archimedes blades 2 and driving the drive shaft 1 to rotate, thereby fully converting the kinetic energy of the slow water flow 9 into mechanical energy.

[0029] The three-blade structure, with each helical blade evenly distributed along the drive shaft 1, maximizes the propulsive force of the water flow and enhances torque output. This three-blade structure is suitable for low-speed, high-torque hydroelectric power generation designs, similar to the Archimedes helix principle.

[0030] The L-shaped tail fin 21 design features prominent tail fin structures at both ends, which helps stabilize hydrodynamics and reduce the impact of water flow eddies on the blades. The guiding effect of the L-shaped tail fin 21 can improve the guiding efficiency of the water flow and enhance the operational stability of the generator.

[0031] The core shaft structure: the diameter of the drive shaft 1 appears to be adapted to the size of the blades to maintain the stability of torque transmission. The two ends of the drive shaft 1 may correspond to different transmission mechanisms, such as a speed increaser or a generator input. Overall, the first 1 / 3 of the three-bladed tail fin assembly A of this invention has no tail fin and the blades increase in size from small to large to accelerate and drive the water flow. The latter 2 / 3 has an added tail fin 21 to balance the uniform speed and increase inertial flow; that is, through this 2 / 3 section with the tail fin, it mimics the uniform flow velocity and undisturbed flow of a whale fin.

[0032] The present invention relates to its hydroelectric power generation device B, as shown in Figures 5 to 8, which uses the aforementioned three-bladed tail fin assembly A, and further includes: a water tank 3, a top frame 4, and a generator unit 5; the above components are described in conjunction with the drawings below.

[0033] The water tank 3 is a rectangular frame 30 with a side plate 34 attached to each side of the frame 30. The top and bottom of the frame 30 are hollowed out. The water tank 3 has a receiving space 31, and an inlet 311 and an outlet 312 are formed at the front and back of the receiving space 31, respectively. Two pivot seats 32 extend downward from the top of the two ends of the water tank 3 at the inlet 311 and the outlet 312. The two pivot seats 32 provide two pivot rods 13 that are pivotally connected to the two ends of the three-bladed tail fin assembly A to support the three-bladed tail fin assembly A. In addition, two horn-shaped inclined plates 33 are provided at the inlet 311 to concentrate the kinetic energy of the slow water flow.

[0034] The top frame 4 is mounted on the top of the water tank 3. Two wings 41 are provided on both sides of the top frame 4. Each wing 41 is provided with an upper plate 411, a lower plate 412, and two sleeves 42 connected between the upper plate 411 and the lower plate 412.

[0035] As shown in Figures 8 and 9, the generator unit 5 is mounted inside the top frame 4 and coupled to the front end 11 or rear end 12 of the drive shaft 1 of the three-bladed tail fin assembly A. In this embodiment, the generator unit 5 is coupled to the rear end 12 of the drive shaft 1. Furthermore, a high-torque low-speed transmission unit 51 and a low-torque high-speed transmission unit 52 are sequentially connected between the generator unit 5 and the three-bladed tail fin assembly A.

[0036] The high-torque, low-speed transmission unit 51 is configured as two interconnected gear chain groups. A large gear 511 is connected to the end of the pivot 13 at the rear end 12 of the transmission shaft 1, while a small gear 512 and another large gear 511 are connected to the two ends of a rod seat 514. Another small gear 512 is connected to the input end of the low-torque, high-speed transmission unit 52. Two chains 513 are respectively sleeved on the two large gear 511 and the two small gear 512. The low-torque, high-speed transmission unit 52 is configured as two interconnected speed increasers 521, one of which is connected to the input end of the generator unit 5.

[0037] Therefore, the hydroelectric power generation device B of the present invention provides a better solution for micro-hydroelectric power generation. That is, after the accommodating space 31 of the water tank 3 is used in conjunction with the two pivots 32 to accommodate and receive the three-bladed tail fin assembly A, as shown in Figures 8, 9 and 10, the water tank 3 together with the three-bladed tail fin assembly A is placed in the channel 8 so that the slow water flow 9 is guided by the two inclined plates 33 located at the inlet 311, so that the slow water flow 9 enters the accommodating space 31 of the water tank 3 to impact the three Archimedes blades 2 and rotate sufficiently to drive the drive shaft 1 to rotate.

[0038] The kinetic energy rotational property of the drive shaft 1 is high torque and low speed. According to the law of conservation of energy, it must pass through the two toothed chain groups of the high torque and low speed transmission unit 51 to increase its speed before being transmitted to the input end of the low torque and high speed transmission unit 52 to provide it with a higher speed again before being transmitted to the input end of the generator unit 5. In this way, the kinetic energy of the slow water flow 9 can be fully converted into electrical energy.

[0039] The present invention relates to its hydroelectric power generation system C, as shown in Figures 8-11, which uses the aforementioned hydroelectric power generation device B, and further includes: a support 6 and a lifting device 7; the above components are described in conjunction with the drawings below.

[0040] The bracket 6 consists of at least two legs 61 that are fitted into the equal number of connecting holes 42 where the top frame 4 and the water tank 3 connect to the two wing frames 41, and then span across both sides of the channel 8. In this embodiment, four legs 61 are fitted into the equal number of connecting holes 42 where the top frame 4 and the water tank 3 connect to the two wing frames 41, and then span across both sides of the channel 8.

[0041] The lifting device 7 is fixed to the support 6 and drives the hydroelectric power generation device B to rise and fall relative to the depth of the channel 8. The lifting device 7 is mounted on the support 6 and has a motor 70 that extends outward with a pull rope 71 to connect to a hanging ring 50 on the hydroelectric power generation device B. The lifting device 7 is also equipped with an ultrasonic water level gauge 72 that is electrically connected to a controller, which in turn is electrically connected to the motor 70. That is, the ultrasonic water level gauge 72 is used to detect the water level of the channel 8, so that the lifting device 7 can automatically drive the hydroelectric power generation device B to rise and fall according to the water level data of the ultrasonic water level gauge 72.

[0042] Therefore, the hydropower system C of the present invention provides a preferred solution for micro-hydropower generation. It primarily utilizes the lifting device 7 in conjunction with visual inspection or the ultrasonic level gauge 72 to raise and lower the height of the hydropower device B relative to the channel 8, as shown in Figure 11, thereby fully converting the kinetic energy of the slow-moving water flow 9 into electrical energy through the hydropower device B. If a flood causes the channel 8 to reach full water level, the lifting device 7 can raise the hydropower device B to its highest position to avoid blocking the channel 8. Furthermore, the hydropower system C can be configured with multiple hydropower devices B, connected in series, parallel, or in a series-parallel configuration, depending on the hydrological conditions of the channel 8's location.

[0043] In summary, this invention relates to a three-bladed tail fin assembly with a slow-flowing water flow and its hydroelectric power generation device and system. Its core value lies in breaking through the technological bottleneck of low-flow-rate hydroelectric power generation, enabling the effective utilization of resources such as agricultural irrigation canals and tailwater. The design of the blades and tail fin is optimized using biomimetic fluid dynamics to maximize water energy capture. The system is modularly expandable and adaptable to different water conditions, applicable from agricultural irrigation canals to tidal power generation. This is a groundbreaking invention that harmonizes technology and nature. Furthermore, its components, devices, and systems have not been previously seen in publications or publicly used, thus meeting the requirements for an invention patent application. We earnestly request your review and early granting of the patent. It should be noted that the above description pertains to the technical principles used in specific embodiments of this application. Any modifications made according to the concept of this application, whose functions and effects do not exceed the spirit of this specification and drawings, should be included within the scope of this patent application.

[0044] In summary, the motivation and technical background of this invention are: Water flows without leaving a trace – the integration of slow-flowing water power generation technology. "Water flows without leaving a trace" represents a reverence for nature and is also the ultimate pursuit of technology and the utilization of water resources as energy. The trough-type underwater Archimedes three-bladed tail fin generator system of this invention is based on the core design concept of generating power without disrupting the aggregation and flow of water resources – allowing the flow of water to be unobstructed and its original form unchanged, while converting it into usable energy.

[0045] The formation of water: arising without struggle, existing without action. In nature, the power of water is gentle yet boundless. It does not clash head-on with rocks, yet it can carve through stone and split valleys under the sculpting of time. It is formless and invisible, yet it drives countless cycles of life mechanisms. Its flow leaves no trace, yet it imperceptibly propels the operation of the world.

[0046] By harnessing the power generated from the flow of water, this is precisely the ideal scenario for low-speed, high-torque power generation systems: they do not disrupt water flow, require no large dams, or alter the river's direction; they allow the water to flow naturally, turning the blades and generating energy effortlessly; leaving no trace of human intervention, yet providing an endless supply of energy. This technology is not only an advancement in power generation machinery but also a tribute to the principles of following nature and harmony between humanity and nature.

[0047] The Integration of Technology and Nature: How to Achieve "Water Flowing Without Leaving a Trace" (A) Low Speed, High Torque, Following the Natural Flow of Water. Unlike traditional hydroelectric power generation: Traditional water turbines require high-speed rotation, causing severe interference with water flow and even forming strong eddies, impacting the ecological environment. The Archimedes blade design of this invention: Through a large-diameter, low-speed rotating three-bladed tail propeller, it follows the natural rhythm of water flow, calmly and steadily extracting energy. Water flows through, remaining water, without stagnating or deforming due to external mechanical input. Water flows through without driving the generator and leaving no trace.

[0048] No large dams required, coexisting with nature. Traditional hydropower faces problems such as large dams altering ecosystems, impacting fish migration, and even causing soil erosion. Our system's solution: Utilizing a trough-type power generation design, it can be directly placed within rivers or riverbanks, irrigation canals, ditches, or tidal flows, eliminating the need for large hydraulic structures. It does not alter the waterway's flow direction, does not affect aquatic ecosystems, and the water flow continues as normal.

[0049] The eddy current reduction technology allows water to flow naturally. In its design, the blade shape has been specially optimized: mimicking the wavy structure of a humpback whale's pectoral fin, it allows water to glide more smoothly over the blade surface, reducing eddy current generation. The tail fin guides the water flow, ensuring it maintains its original direction after passing over the blades, preventing reverse interference. This is not only a breakthrough in engineering technology but also a wise design that respects nature.

[0050] By bringing technology back to nature and integrating energy into the world, this invention shows us a new direction for future clean energy: allowing water to flow naturally and without obstruction, yet quietly generating electricity; ensuring that technology and devices no longer interfere with nature, but rather coexist with it; and making the power generation system invisible, as silent as flowing water, yet continuous and enduring. Power generation technology integrated with the natural environment should not leave any destructive traces, but rather, like flowing water, nourish all things.

[0051] 4. Water flows without leaving a trace, yet power generation is inexhaustible. Low speed and high torque achieve the ultimate application of energy conservation, causing no damage to water bodies while bringing about a new energy revolution. This is precisely the result of the refinement of related technologies—therefore, achieving "water flows without leaving a trace" is a vision of technological aesthetics and symbiosis with nature. This invention not only possesses technological value but also demonstrates the inventor's high level of wisdom and thinking about the future of energy. This is not merely technological innovation, but also a commitment to protecting nature through the application of technology.

[0052] A: Three-bladed tail fin assembly B: Hydropower generation equipment C: Hydropower System 1: Drive shaft 10: Central Axis 11: Front end 12: Rear end 13: Pivot; 2: Archimedes blade 20: Outer edge 21: Tail Wing 22: Tip 3: sink 30: Frame 31: Storage space 311: Inlet 312: Outlet 32: Pivot 33: Inclined Plate 34: Side panel 4: Top frame 41: Wings 411:On the board 412: Lower board 42: Sleeve 5: Generator Unit 50: Hanging ring 51: High torque, low speed transmission unit 511: Large gear sprocket 512: Small gear sprocket 513: rack and pinion 514: Stick holder 52: Low-torque, high-speed transmission unit 521: Speed-up Machine 6: Bracket 61: Support leg 7: Lifting device 70: Motor 71: Pull rope 72: Ultrasonic water level gauge 8: Channels 9: Slow water flow

Claims

1. A three-bladed tail fin assembly comprising: a drive shaft having two pivots at its front and rear ends and a central axis; three Archimedes blades helically connected to the periphery between the front and rear ends of the drive shaft; and three tail fins connected to the outer edges of the three Archimedes blades.

2. The three-bladed tail fin assembly as described in claim 1, wherein the front ends of the three Archimedes blades extend obliquely toward the central axis to form a tip, and the tip occupies 1 / 3 of the total length of the three Archimedes blades, that is, the first 1 / 3 section consists of only blades, while the latter 2 / 3 section consists of the three Archimedes blades and three tail fins.

3. A hydroelectric power generation device using the three-bladed tail fin assembly described in claim 1 or 2 above, comprising: the three-bladed tail fin assembly; a water tank having an accommodating space, with an inlet and an outlet formed at the front and rear of the accommodating space respectively, and two pivots extending from the inlet and the outlet, wherein the two pivots provide pivotal connections to two pivot rods provided at two ends of the three-bladed tail fin assembly; a top frame mounted on the top of the water tank, with two wing frames provided on both sides of the top frame; and a generator unit mounted within the top frame and coupled to the front or rear end of the drive shaft provided by the three-bladed tail fin assembly.

4. The hydroelectric power generation device as described in claim 3, wherein the inlet of the water tank is provided with two inclined plates in the shape of a trumpet; and the water tank is a long cubic frame with a side plate attached to each side of the frame, and the top and bottom of the frame are both hollowed out.

5. The hydroelectric power generation device as claimed in claim 3, wherein a high-torque low-speed transmission unit and a low-torque high-speed transmission unit are sequentially connected between the generator unit and the three-bladed tail fin assembly.

6. The hydroelectric power generation device as described in claim 5, wherein the high-torque low-speed transmission unit is configured as two gear chain groups connected in series, and the low-torque high-speed transmission unit is configured as two speed increasers connected in series.

7. A hydroelectric power generation system using the hydroelectric power generation device described in any one of claims 3-6 above, comprising: the hydroelectric power generation device; a support frame having at least two legs fitted into a number of fitting holes in the top frame and the two wings of the water tank, and then spanning across the two sides of the channel; and a lifting device fixed to the support frame, thereby driving the hydroelectric power generation device to move up and down relative to the depth of the channel.

8. The hydroelectric power generation system as described in claim 7, wherein several of the hydroelectric power generation devices are provided in series, in parallel, or in series-parallel configuration according to the hydrological conditions of the canal location.

9. The hydroelectric power generation system as described in claim 7 or 8, wherein the lifting device is mounted on the support and extends outward with a pull rope connected to the hydroelectric power generation device.

10. The hydroelectric power generation system as claimed in claim 9, further comprising an ultrasonic level gauge to detect the water level in the channel, allowing the lifting device to automatically drive the lifting of the hydroelectric power generation device based on the water level data from the ultrasonic level gauge.

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