A wave energy power generation buoy and its working method

Abstract

The present invention discloses a wave energy power generation buoy, characterized by comprising: a buoy shell, a counterweight, a generator mechanism, a floating plate, a rope, a connecting rod, and a sealing strip assembly. The floating plate floats up and down with the waves, and the connecting rod drives a rope wrapped around the input shaft of the generator mechanism, causing the input shaft to rotate counterclockwise or clockwise. The internal structure of the generator mechanism converts the different-direction inputs into the same-direction outputs, driving the internal generator to rotate in the same direction to generate electricity. The present invention can generate electricity during both the rising and falling wave phases, achieving bidirectional power generation. Furthermore, the invention has two sets of rotating generator sets, which can maximize the utilization of wave energy and achieve a high energy utilization rate.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation buoys, and in particular to a wave energy power generation buoy and a working method thereof. Background Art

[0002] A marine buoy is a navigational aid anchored at a designated location at sea, floating on the water's surface. Buoys equipped with lights are called light buoys, while others are also equipped with oceanographic survey instruments, radar transponders, radio beacons, and other equipment. Currently, most of these buoys are powered by batteries. However, since many buoys are located far from land, battery replacement is inconvenient. Some buoys utilize solar energy, wave power, and wind power to reduce the need for battery replacement, making them simpler and more economical. However, using solar panels for power generation can reduce the efficiency of photovoltaic conversion in inclement weather, potentially leading to insufficient power and malfunctioning of the buoy, causing inconvenience when using the buoy. Wind power, like solar power, is also highly dependent on weather conditions. Wave energy is a high-quality, clean, and all-weather renewable energy source. Using wave power to achieve energy self-sufficiency for marine buoys is convenient, feasible, and practical. Wave energy generation primarily converts wave energy into mechanical energy through turbines, gear speed-increasing mechanisms, and other mechanisms. Turbines, such as air turbines (oscillating water column types), are commonly used in wave energy buoys. However, these devices generally suffer from low energy conversion efficiency, while other power generation mechanisms also suffer from shortcomings such as low energy utilization, unstable performance, and severe corrosion. Patent number ZL200810083910.5, entitled "Floating Body and Pulley Wave Energy Generation System," utilizes a floating body to receive wave thrust. A rope tied to the floating body at one end and wound around a rotor at the other end pulls the rotor, converting the resulting irregular wave thrust into rotational power for electricity generation. During the receding wave phase, a worm spring drives the rotor in reverse, retracting the rope. The buoy's rotor can be directly connected to an engine for rectification and storage. This invention utilizes unidirectional power generation, generating electricity during the rising wave phase but not during the receding wave phase. This phase fails to fully utilize wave energy, resulting in low energy utilization. The unstable position of the floating body hinders the rope's movement, which in turn results in some energy loss. In addition, its power generation performance is limited by an additional device - the worm spring, and the overall integration is not high and is easily affected. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a wave energy power generation buoy and a working method thereof to solve the problems of low wave energy utilization, low integration and unstable power supply in the prior art.

[0004] The present invention provides a wave energy power generation buoy, comprising: a buoy shell, a counterweight, a power generation mechanism, a floating plate, a rope, a connecting rod, and a sealing strip assembly; the buoy shell is a closed shell, the lower part of the buoy shell is immersed below the sea surface, and the upper part is above the sea surface, and the buoy shell is fixed by an anchor chain; the power generation mechanism has two groups, which are symmetrically arranged at the upper top and lower bottom of the buoy shell; the power generation mechanism includes: a generator, a transmission assembly, and an energy storage module, the output shaft of the transmission assembly is connected to the input shaft of the generator, and the output end of the generator is connected to the input end of the energy storage module; the counterweight is arranged at the lower bottom of the buoy shell; the rope is wrapped around the two On the input shaft of each transmission assembly, two pull ropes are formed between the input shafts of the two transmission assemblies; the float is sleeved on the outer wall of the buoy shell and floats on the sea surface, and can slide up and down on the buoy shell; a strip groove is vertically opened in the middle of the buoy shell, and a sealing strip assembly is arranged at the strip groove to seal the strip groove; one end of the connecting rod is fixedly connected to a pull rope, and the other end passes through the strip groove and is fixedly connected to the float; the float slides up and down within the range of the strip groove with the waves, and the pull rope is pulled by the connecting rod to rotate the input shaft of the transmission assembly. The transmission assembly converts the bidirectional rotation of the input shaft into a unidirectional output through gear cooperation, driving the generator to continuously generate electricity.

[0005] Furthermore, the transmission assembly includes: an inner transmission shaft, an input transmission shaft, an outer transmission shaft, an output transmission shaft, a support shaft, a first transmission gear, a second transmission gear, and a steering gear;

[0006] The support shaft is horizontally mounted on the inner wall of the buoy shell; the inner transmission shaft, input transmission shaft and outer transmission shaft are sequentially sleeved on the support shaft from the inside to the outside to form a three-layer sleeve structure; one end of the input transmission shaft is wrapped with a rope as the input shaft of the transmission assembly, and the other end of the input transmission shaft is respectively connected to the end of the inner transmission shaft and the outer transmission shaft on the same side through a ratchet mechanism. When the input transmission shaft rotates in one direction, the outer transmission shaft is driven to rotate through the ratchet mechanism, and when the input transmission shaft rotates in the other direction, the inner transmission shaft is driven to rotate through the ratchet mechanism; one end of the output transmission shaft is connected to the input shaft of the generator, and the other end of the output transmission shaft is sleeved with a first transmission gear and a second transmission gear; the first transmission gear and the second transmission gear are both connected to the output transmission shaft through a ratchet mechanism, and the first transmission gear and the second transmission gear are both driven by the ratchet mechanism to drive the output transmission shaft to rotate in one direction; the other end of the outer transmission shaft is a gear, which is meshed with the second transmission gear; the other end of the inner transmission shaft is a gear, which is meshed with the steering gear; the steering gear is meshed with the first transmission gear.

[0007] Furthermore, the sealing strip assembly includes: an elastic frame and a sealing strip; the elastic frame is arranged around the edge of the strip groove to generate an inward extrusion force; a center seam is opened in the middle of the sealing strip along the extension direction of the sealing strip, and the sealing strip is connected to the inner frame wall of the elastic frame, completely covering the strip groove to seal the strip groove; the connecting rod passes through the center seam, one end is fixedly connected to a pull rope, and the other end is fixedly connected to the floating plate.

[0008] Furthermore, the longitudinal section of the connecting rod is spindle-shaped or elliptical.

[0009] Furthermore, the floating plate is a thin plate.

[0010] Furthermore, when the float is on a still water surface, the position of the float on the float shell ranges from the bottom to the middle of the buoy shell.

[0011] Furthermore, the floating plate is circular, and the diameter of the floating plate is greater than 1.5 times the width of the buoy shell.

[0012] The present invention also provides a method for operating a wave energy power generation buoy, comprising: placing the buoy in the open sea, and when there are waves, the float plate floats up and down with the waves, and the float plate pulls a rope fixedly connected to the connecting rod through a connecting rod to move up and down, and the pulling rope drives the input shaft of the transmission component wound with the rope to rotate forward or reverse, and the transmission component outputs the forward or reverse rotation of the input shaft to the output shaft in the same direction through gear cooperation, driving the input shaft of the generator to rotate in the same direction to continuously generate electricity.

[0013] Furthermore, the draft of the buoy is adjusted by a counterweight according to the height of the waves in the sea area where the buoy is located, thereby adjusting the movement distance of the floating plate.

[0014] Beneficial effects of the present invention:

[0015] The present invention can generate electricity in both the wave rising stage and the wave falling stage, which is bidirectional power generation, and has two sets of rotating power generation groups, which can utilize wave energy to a large extent and have a high energy utilization rate; the present invention can drive the same generator to generate electricity in both the wave rising stage and the wave falling stage, and the generator can continuously rotate in the same direction to generate electricity, with good power generation sustainability and high feasibility; the structure is relatively simple, with fewer exposed parts, reducing seawater erosion and being durable; the overall structural integration is good, without the influence of additional devices, and the stability during use is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings:

[0017] Figure 1 This is a front view of the interior of the buoy housing according to a specific embodiment of the present invention;

[0018] Figure 2 is a three-dimensional schematic diagram of a power generation mechanism according to a specific embodiment of the present invention;

[0019] Figure 3 is a schematic cross-sectional view of a power generation mechanism according to a specific embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of a ratchet mechanism between the inner, outer, and input drive shafts according to a specific embodiment of the present invention;

[0021] Figure 5 This is a three-dimensional schematic diagram of the output transmission shaft, the first transmission gear, and the second transmission gear after being socketed in a specific embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the ratchet mechanism between the first transmission gear and the output transmission shaft in a specific embodiment of the present invention;

[0023] Figure 7 Schematic diagram of the ratchet mechanism between the second transmission gear and the output transmission shaft in a specific embodiment of the present invention;

[0024] Figure 8 is a schematic cross-sectional view of a floating plate according to a specific embodiment of the present invention;

[0025] Figure 9 Schematic diagram of a sealing strip assembly according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] The present invention will be further described below with reference to specific examples. Those skilled in the art will appreciate that these examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention, and that modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims.

[0028] like Figure 1-9 As shown, an embodiment of the present invention provides a wave energy power generation buoy, comprising: a buoy shell 1, a counterweight block 2, a power generation mechanism 6, a floating plate 3, a rope 4, a connecting rod 5, and a sealing strip assembly;

[0029] The buoy shell 1 is a closed shell in the shape of a dumbbell, which is divided into an upper part 11 of the buoy shell, a middle part 12 of the buoy shell, and a lower part 13 of the buoy shell. The upper part 11 of the buoy shell and the lower part 13 of the buoy shell are symmetrical structures. The longitudinal sections of the upper part 11 of the buoy shell and the lower part 13 of the buoy shell are rectangular, trapezoidal, etc. The lower part 13 of the buoy shell is immersed below the sea surface, the upper part 11 of the buoy shell is above the sea surface, and the lower part 13 of the buoy shell is fixed by an anchor chain 7; the power generation mechanism 6 has two groups, which are symmetrically arranged in the upper part 11 of the buoy shell and the lower part 13 of the buoy shell respectively; the counterweight block 2 is arranged at the bottom end of the lower part 13 of the buoy shell; the power generation mechanism 6 includes: a generator 61, a transmission assembly, and an energy storage module 63.

[0030] like Figure 3-5 As shown, the transmission assembly includes: an inner transmission shaft 621, an input transmission shaft 622, an outer transmission shaft 623, an output transmission shaft 624, a support shaft 625, a first transmission gear 626, a second transmission gear 627, and a steering gear 628;

[0031] The support shaft 625 is horizontally mounted on the inner wall of the buoy shell 1 through the support rods 629 at both ends; the inner transmission shaft 621, the input transmission shaft 622, and the outer transmission shaft 623 are sequentially sleeved on the support shaft 625 from the inside to the outside to form a three-layer sleeve structure. The shafts can be supported by bearings and other means to avoid linkage between the shafts; one end of the input transmission shaft 622 serves as the input shaft of the transmission assembly, and the other end of the input transmission shaft 622 is respectively connected to the inner transmission shaft 621 and the outer transmission shaft 623 on the same side through a ratchet mechanism. As shown in the figure, the inner transmission shaft 62 1 is provided with a circumferential one-way ratchet on the outer wall to form a ratchet, and the inner wall of the outer transmission shaft 623 is also provided with a circumferential one-way ratchet to form an inner ratchet. A plurality of pawls are provided on the inner and outer walls of the input transmission shaft 622. The pawls and the ratchets on the inner and outer transmission shafts 623 form two ratchet mechanisms. When the input transmission shaft 622 rotates in one direction, the ratchet mechanism drives the outer transmission shaft 623 to rotate simultaneously. When the input transmission shaft 622 rotates in the other direction, the ratchet mechanism drives the inner transmission shaft 621 to rotate simultaneously. The inner transmission shaft 621 rotates in opposite directions to the outer transmission shaft 623.

[0032] like Figure 6 、 7As shown, the first transmission gear 626 and the second transmission gear are sleeved at one end of the output transmission shaft 624. The sleeve arrangement can be achieved by sleeve connection through bearings or other means, so that the two transmission teeth can rotate with the output transmission shaft 624 as the axis; the first transmission gear 626 and the second transmission gear 627 are both connected to the output transmission shaft 624 through a ratchet mechanism, and a one-way ratchet is provided on the outer wall of the position where the output transmission shaft 624 sleeves the first transmission gear 626 to form a ratchet, and a plurality of pawls are provided on the inner wall of the first transmission gear 626, and the pawls and the ratchet constitute a ratchet mechanism; a plurality of pawls are provided on the outer wall of the position where the output transmission shaft 624 sleeves the second transmission gear, and the second transmission gear 627 is connected to the output transmission shaft 624 through a ratchet mechanism. The inner wall of the movable gear 627 is provided with ratchet teeth to form an inner ratchet, and the pawl and ratchet form a ratchet mechanism. The first transmission gear 626 and the second transmission gear 627 both drive the output transmission shaft 624 to rotate in one direction through the ratchet mechanism. The other end of the outer transmission shaft 623 is a gear that meshes with the second transmission gear 627. The other end of the inner transmission shaft 621 is a gear that meshes with the steering gear 628, which also meshes with the first transmission gear 626. The other end of the output transmission shaft 624 is connected to the input shaft of the generator 61. The output end of the generator 61 is connected to the input end of the energy storage module 63, which supplies power to various electrical devices on the buoy.

[0033] The rope 4 is annular and can be wound around the input shafts of the two transmission components in the form of a winding drum, forming two pull ropes 41 between the input shafts of the two transmission components. The input shafts are rotated by pulling the pull ropes 41.

[0034] The float 3 is circular and can be made of a thin plate to increase its sensitivity to wave action. The diameter of the float 3 is greater than 1.5 times the width of the buoy shell 1, which can provide good buoyancy for the buoy, allowing the buoy to always float on the water surface and maintain overall stability. The float 3 is mounted on the middle part 12 of the buoy shell, floats on the sea surface, and can slide up and down on the middle part 12 of the buoy shell; the starting position of the float 3 can be adjusted by the counterweight block 2, specifically according to the maximum wave height of the sea area where the buoy is located, ensuring that the movable range of the float 3 meets the wave height. Generally, the starting position of the float 3 is set between the bottom end of the middle part 12 of the buoy shell and 1 / 2 of the middle part 12 of the buoy shell.

[0035] like Figure 8 、 9As shown, a strip slot is opened axially in the middle part 12 of the buoy shell, and the length of the strip slot can be the same as or close to the length of the middle part 12 of the buoy shell, and a sealing strip assembly is arranged at the strip slot to seal the strip slot; the sealing strip assembly includes: an elastic frame 81 and a sealing strip 82; the elastic frame 81 is arranged around the edge of the strip slot, generating an extrusion force inward, and also sealing the edge of the strip slot; a center seam is opened in the middle of the sealing strip 82 along the extension direction of the strip slot, and the sealing strip 82 is connected to the inner frame wall of the elastic frame 81, completely covering the strip slot to seal the strip slot, and due to the inward extrusion force of the elastic frame 81, the center seam of the sealing strip 82 forms an extrusion-type seal; the connecting rod 5 passes through the center seam and is fixedly connected to a pull rope 41 at one end, and is fixedly connected to the floating plate 3 at the other end. The longitudinal section of the connecting rod 5 is shuttle-shaped or elliptical, which is more suitable for the sealing strip 82 at the center seam to fit with the connecting rod 5 to ensure airtightness. The floating plate 3 slides up and down within the range of the strip groove with the waves, and pulls the pull rope 41 through the connecting rod 5 to rotate the input shaft of the transmission assembly. The transmission assembly converts the bidirectional rotation of the input shaft into a unidirectional output through gear matching, driving the generator 61 to continuously generate electricity.

[0036] The following describes the working method of the wave energy power generation buoy provided by a specific embodiment of the present invention:

[0037] After the buoy is anchored by the anchor chain 7 and floated on the sea surface, the counterweight block 2 is adjusted according to the maximum wave height in the sea area to adjust the starting position of the float plate 3. As shown in the figure, when the buoy floats up with the waves, the float plate 3 will move upward relative to the buoy housing 1, driving the pull rope 41 upward through the connecting rod 5. Since the rope 4 is wound around the input end of the input transmission shaft 622 by means of a winding drum, the rope 4 will drive the upper and lower input transmission shafts 622 to rotate counterclockwise, as shown in the figure. Figure 5 As shown, the input transmission shaft 622 will only drive the outer transmission shaft 623 to rotate counterclockwise through the pawl on the outer wall, and the gear at the other end of the outer transmission shaft 623 will also rotate counterclockwise, driving the second transmission gear 627 meshing with it to rotate clockwise, as shown in FIG. Figure 7 As shown, the ratchet on the inner wall of the second transmission gear 627 drives the pawl on the output transmission shaft 624, thereby driving the output transmission shaft 624 to rotate clockwise to generate electricity. The generated electricity is stored in the energy storage module 63 for use by various devices in the buoy. When the buoy sinks with the waves, the floating plate 3 moves downward relative to the buoy shell 1, driving the pull rope 41 downward through the connecting rod 5, and the rope 4 drives the upper and lower input transmission shafts 622 to rotate clockwise, as shown in FIG. Figure 5 As shown, the input transmission shaft 622 will only drive the inner transmission shaft 621 to rotate clockwise through the pawl on the inner wall, and the gear at the other end of the inner transmission shaft 621 will also rotate clockwise, and the steering gear 628 meshing with it will rotate counterclockwise, and the first transmission gear 626 meshing with the steering gear 628 will rotate clockwise, as shown in FIG. Figure 6 As shown, the pawl on the inner wall of the first transmission gear 626 drives the ratchet on the outer wall of the output transmission shaft 624, thereby causing the output transmission shaft 624 to rotate clockwise, generating electricity. The generated electricity is stored in the energy storage module 63 for use by various components within the buoy. It will be appreciated that the orientation of the ratchet teeth in the ratchet mechanism can be adjusted according to actual needs. The primary purpose of the ratchet mechanism is to convert rotational inputs in different directions into rotational outputs in the same direction. Furthermore, the use of this ratchet mechanism prevents the output transmission shaft 624 from rotating simultaneously with one transmission gear, thereby preventing the output transmission shaft 624 from rotating simultaneously with another transmission gear, leading to rotational backpropagation.

[0038] Through the description of the working method, it can be seen that the wave energy power generation buoy provided by the specific embodiment of the present invention is always rotating in the same direction regardless of whether the floating plate 3 is floating up or down. The output transmission shaft 624 that drives the input shaft of the generator 61 is always rotating in the same direction. Firstly, it is achieved that power generation can be carried out regardless of floating up or down, and secondly, it is achieved that power generation can be continuously carried out in the same direction regardless of floating up or down.

[0039] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A wave energy power generation buoy, characterized in that: include: The buoy shell, counterweight, power generation mechanism, floating plate, rope, connecting rod, and sealing strip assembly; the buoy shell is a closed shell, with the lower part of the buoy shell immersed below the sea surface and the upper part above the sea surface. The buoy shell is fixed by an anchor chain; there are two groups of power generation mechanisms, which are symmetrically arranged at the upper top and lower bottom of the buoy shell; the power generation mechanism includes: a generator, a transmission assembly, and an energy storage module. The output shaft of the transmission assembly is connected to the input shaft of the generator, and the output end of the generator is connected to the input end of the energy storage module; the counterweight is arranged at the lower bottom of the buoy shell; the rope is wrapped around the input shafts of the two transmission assemblies Two pull ropes are formed between the input shafts of the two transmission assemblies; the floating plate is sleeved on the outer wall of the buoy shell and floats on the sea surface, and can slide up and down on the buoy shell; a strip groove is vertically opened in the middle of the buoy shell, and a sealing strip assembly is arranged at the strip groove to seal the strip groove; one end of the connecting rod is fixedly connected to a pull rope, and the other end passes through the strip groove and is fixedly connected to the floating plate; the floating plate slides up and down within the strip groove range with the waves, and the pull rope is pulled by the connecting rod to rotate the input shaft of the transmission assembly. The transmission assembly converts the bidirectional rotation of the input shaft into a unidirectional output through gear matching, driving the generator to continuously generate electricity; The transmission assembly includes: an inner transmission shaft, an input transmission shaft, an outer transmission shaft, an output transmission shaft, a support shaft, a first transmission gear, a second transmission gear, and a steering gear; The support shaft is horizontally mounted on the inner wall of the buoy shell; the inner transmission shaft, input transmission shaft and outer transmission shaft are sequentially sleeved on the support shaft from the inside to the outside to form a three-layer sleeve structure; one end of the input transmission shaft is wrapped with a rope as the input shaft of the transmission assembly, and the other end of the input transmission shaft is respectively connected to the end of the inner transmission shaft and the outer transmission shaft on the same side through a ratchet mechanism. When the input transmission shaft rotates in one direction, the outer transmission shaft is driven to rotate through the ratchet mechanism, and when the input transmission shaft rotates in the other direction, the inner transmission shaft is driven to rotate through the ratchet mechanism; one end of the output transmission shaft is connected to the input shaft of the generator as the output shaft of the transmission assembly, and the other end of the output transmission shaft is sleeved with a first transmission gear and a second transmission gear; the first transmission gear and the second transmission gear are both connected to the output transmission shaft through a ratchet mechanism, and the first transmission gear and the second transmission gear are both driven by the ratchet mechanism to drive the output transmission shaft to rotate in one direction; the other end of the outer transmission shaft is a gear, which is meshed with the second transmission gear; the other end of the inner transmission shaft is a gear, which is meshed with the steering gear; the steering gear is meshed with the first transmission gear.

2. The wave energy power generation buoy according to claim 1, characterized in that: The sealing strip assembly includes: an elastic frame and a sealing strip; the elastic frame is arranged around the edge of the strip groove to generate an inward extrusion force; a center seam is opened in the middle of the sealing strip along the extension direction of the sealing strip, and the sealing strip is connected to the inner frame wall of the elastic frame, completely covering the strip groove to seal the strip groove; a connecting rod passes through the center seam, one end of which is fixedly connected to a pull rope, and the other end is fixedly connected to the floating plate.

3. The wave energy power generation buoy according to claim 1, characterized in that: The longitudinal section of the connecting rod is shuttle-shaped or elliptical.

4. The wave energy power generation buoy according to claim 1, characterized in that: The floating plate is a light and thin plate.

5. The wave energy power generation buoy according to claim 1, characterized in that: When the floating plate is on a still water surface, the position range of the floating plate on the floating plate shell is between the bottom and the middle of the buoy shell.

6. The wave energy power generation buoy according to claim 1, characterized in that: The floating plate is circular, and its diameter is greater than 1.5 times the width of the buoy shell.

7. A method for operating a wave energy power generation buoy, applicable to the wave energy power generation buoy according to any one of claims 1 to 6, characterized in that: The working method of the wave energy power generation buoy includes: placing the buoy in the open sea, and when there are waves, the float plate floats up and down with the waves, and the float plate pulls a pull rope fixedly connected to the connecting rod through a connecting rod to move up and down, and the pull rope drives the input transmission shaft of the transmission component wrapped with the rope to rotate forward or reverse. The transmission component outputs the forward or reverse rotation of the input transmission shaft to the output transmission shaft in the same direction through gear cooperation, driving the generator input shaft to rotate in the same direction to continuously generate electricity.

8. The operating method of the wave energy power generation buoy according to claim 7, characterized in that: The draft of the buoy is adjusted by the counterweight according to the wave height in the sea area where the buoy is located, thereby adjusting the movement distance of the float.

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