Swimming sink fluid mechanics measuring system and method

Abstract

The invention discloses a swimming tank fluid mechanics measuring system and method, the swimming tank fluid mechanics measuring system comprises a swimming tank, the swimming tank is provided with a water flow speed adjusting device, and the water flow speed adjusting device is connected with a control center; a first cross beam and a second cross beam are respectively arranged at two ends of the swimming tank, the first cross beam is provided with a first traction assembly, and the first traction assembly is provided with a first force sensor; the second cross beam is provided with a second traction assembly, and the second traction assembly is provided with a second force sensor. According to the invention, the swimming speed of an athlete is controlled by utilizing the water flow speed, so that the athlete is kept unchanged in position relative to the swimming trough under specific exercise intensity, and the traction force and resistance of swimming of the athlete can be synchronously measured and comprehensively evaluated, so that the body and technical conditions of the swimming athlete in the swimming process can be reflected more truly and more comprehensively; the method plays an important role in optimizing training plans and competition strategies of swimming athletes.

Description

Technical Field

[0001] This invention belongs to the field of swimming training and testing technology, specifically relating to a swimming tank fluid dynamics measurement system and method. Background Technology

[0002] Swimming is a skill-based activity in which the human body propels itself forward in water using limb movements and the interaction between the water and the body. In terms of public fitness, it is a widely practiced mass sport suitable for all ages and genders. In competitive sports, it is a key area of ​​competition for countries due to the large number of gold medals won. In today's increasingly competitive swimming, achieving victory by "reducing resistance or increasing propulsion" has always been a goal pursued by coaches, athletes, and researchers. Therefore, analyzing the magnitude of resistance and other influencing factors in water, and developing more effective swimming techniques to improve athletes' energy utilization, has become a focus of attention.

[0003] In existing technology, a rope connected to a resistance band is usually tied around the waist of the swimmer in the pool to test their propulsive force. However, this method has the following drawbacks: 1. It can only be tested in still water, and all the measured forces are calculated as propulsive force, but the water resistance cannot be calculated; 2. When tested in still water, it is impossible to measure the propulsion and resistance at different swimming speeds; 3. During the test, only the forward momentum was measured; the resistance was not measured. 4. The test data can only measure the maximum value and cannot measure the full force curve; 5. Net propulsion cannot be obtained; 6. The efficiency index cannot be obtained. Summary of the Invention

[0004] The purpose of this invention is to provide a hydrodynamic measurement system and method for swimming tanks, which solves the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, the present invention employs the following technical solution: a swimming tank hydrodynamic measurement system, comprising a swimming tank equipped with a water flow velocity regulating device connected to a control center; a first crossbeam and a second crossbeam are respectively provided at both ends of the swimming tank; the first crossbeam is equipped with a first traction component connected to the athlete, and the first traction component is equipped with a first force sensor for detecting the athlete's swimming traction force; the second crossbeam is equipped with a second traction component connected to the athlete, and the second traction component is equipped with a second force sensor for detecting the athlete's swimming resistance; both the second force sensor and the first force sensor are connected to the control center, which is used to obtain the athlete's net propulsion force and propulsion efficiency based on the athlete's traction force and resistance data, wherein the net propulsion force is the difference between the traction force and the resistance, and the propulsion efficiency is the ratio of the traction force to the net propulsion force.

[0006] As an optional implementation of the above technical solution, the swimming pool is equipped with a video acquisition device, which is connected to the control center. The video acquisition device is used to collect video data of the swimmer's swimming movements, and the control center is used to develop an optimized training plan for the swimmer based on the data of the swimmer's swimming movements, swimming resistance, and traction.

[0007] As an optional implementation of the above technical solution, the swimming tank is provided with fixed protrusions on both sides, the first crossbeam is provided with a first clamping mechanism connected to the fixed protrusions at both ends, and the second crossbeam is provided with a second clamping mechanism connected to the fixed protrusions at both ends.

[0008] As an optional implementation of the above technical solution, the first clamping mechanism includes a first outer fixing component and a first inner fixing component, and the fixing protrusion is clamped between the first outer fixing component and the first inner fixing component.

[0009] As an optional embodiment of the above technical solution, the first outer fixing component includes a first outer fixing plate, a first outer fixing bolt, and a first outer support pad. The first outer fixing plate is fixed on the first crossbeam, and the first outer fixing bolt is threadedly connected to the first outer fixing plate. One end of the first outer fixing bolt passes through the first outer fixing plate and presses the first outer support pad against the outside of the fixing protrusion. A first outer anti-slip pad is provided on the side of the first outer support pad that contacts the fixing protrusion.

[0010] As an optional embodiment of the above technical solution, the first inner fixing assembly includes a first inner fixing plate, a first inner fixing bolt, and a first inner support pad. The first inner fixing plate is fixed on the first crossbeam, and the first inner fixing bolt is threadedly connected to the first inner fixing plate. One end of the first inner fixing bolt passes through the first inner fixing plate and presses the first inner support pad against the inner side of the fixing protrusion. A first inner anti-slip pad is provided on the side of the first inner support pad that contacts the fixing protrusion.

[0011] As an optional embodiment of the above technical solution, the second clamping mechanism includes a second outer fixing component and a second inner fixing component, and the fixing protrusion is clamped between the second outer fixing component and the second inner fixing component.

[0012] As an optional embodiment of the above technical solution, the second outer fixing component includes a second outer fixing plate, a second outer fixing bolt, and a second outer support pad. The second outer fixing plate is fixed on the second crossbeam, and the second outer fixing bolt is threadedly connected to the second outer fixing plate. One end of the second outer fixing bolt passes through the second outer fixing plate and presses the second outer support pad against the outside of the fixing protrusion. A second outer anti-slip pad is provided on the side of the second outer support pad that contacts the fixing protrusion.

[0013] As an optional embodiment of the above technical solution, the second inner fixing assembly includes a second inner fixing plate, a second inner fixing bolt, and a second inner support pad. The second inner fixing plate is fixed on the second crossbeam, and the second inner fixing bolt is threadedly connected to the second inner fixing plate. One end of the second inner fixing bolt passes through the second inner fixing plate and presses the second inner support pad against the inner side of the fixing protrusion. A second inner anti-slip pad is provided on the side of the second inner support pad that contacts the fixing protrusion.

[0014] As an optional implementation of the above technical solution, the first traction component includes a first traction rope, and both ends of the first traction rope are provided with first hooks. One of the first hooks is connected to the waist belt on the athlete's body, and the other first hook is connected to a first lug. The first lug is connected to a first force sensor, and the first force sensor is mounted on a first crossbeam through a first fixing plate.

[0015] As an optional implementation of the above technical solution, the first traction rope includes a first front steel wire rope, a first tension spring and a first rear steel wire rope, with the two ends of the first tension spring connected to the first front steel wire rope and the first rear steel wire rope respectively.

[0016] As an optional embodiment of the above technical solution, the second traction component includes a second traction rope, and both ends of the second traction rope are provided with second hooks. One of the second hooks is connected to the waist belt on the athlete's body, and the other second hook is connected to a second lug. The second lug is connected to a second force sensor, and the second force sensor is installed on the second crossbeam through a second fixing plate.

[0017] As an optional embodiment of the above technical solution, the second traction rope includes a second front wire rope, a second tension spring, and a second rear wire rope, with the two ends of the second tension spring connected to the second front wire rope and the second rear wire rope, respectively.

[0018] As an optional implementation of the above technical solution, the side wall of the swimming tank is provided with an observation window.

[0019] On the other hand, the present invention adopts the following technical solution: a method for measuring the hydrodynamics of a swimming tank, using the above-mentioned swimming tank hydrodynamics measurement system, the method comprising: Step A: Control the water flow rate in the swimming tank; Step B: Use the first force sensor to obtain the athlete's traction force and the second force sensor to obtain the athlete's resistance force. Step C: Based on the athlete's traction and drag data, obtain the athlete's net propulsion and propulsion efficiency.

[0020] As an optional implementation of the above technical solution, it also includes: step D, collecting video data of the athlete's swimming movements, and developing an optimized training plan for the athlete based on the data of the athlete's swimming movements, swimming resistance and traction.

[0021] The beneficial effects of this invention are as follows: This invention utilizes water flow velocity to control the swimming speed of athletes, allowing them to maintain a constant position relative to the swimming pool under specific exercise intensity. It can simultaneously measure the traction and resistance of the athletes while swimming and conduct a comprehensive evaluation, thereby providing a more realistic and comprehensive reflection of the swimmer's physical and technical condition during the swimming process. This plays an important role in optimizing swimmers' training plans and competition strategies. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a swimming tank fluid dynamics measurement system according to one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the first crossbeam and the second crossbeam in one embodiment of the present invention; Figure 3 yes Figure 2 Enlarged view of section A in the middle; Figure 4This is a schematic diagram of the structure of the first outer fixing component in one embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the first inner fixing component in one embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the first traction component in one embodiment of the present invention.

[0023] In the diagram: 1-swimming tank; 2-first crossbeam; 3-second crossbeam; 4-first traction assembly; 5-first force sensor; 6-second traction assembly; 7-second force sensor; 8-fixing protrusion; 9-first clamping mechanism; 10-second clamping mechanism; 11-first outer fixing plate; 12-first outer fixing bolt; 13-first outer support pad; 14-first outer anti-slip pad; 15-first inner fixing plate; 16-first inner fixing bolt; 17-first inner support pad; 18-first inner anti-slip pad; 19-first hook; 20-first lifting lug; 21-first fixing plate; 22-first front steel wire rope; 23-first tension spring; 24-first rear steel wire rope; 25-observation window. Detailed Implementation

[0024] like Figures 1-6 As shown, this embodiment provides a swimming tank hydrodynamic measurement system, including a swimming tank 1. The swimming tank 1 is equipped with a water flow velocity regulating device, which is connected to a control center. The water flow velocity regulating device adopts existing technology and is used to adjust the water flow velocity to simulate the swimming situation of an athlete. To facilitate observation of the athlete's swimming condition, an observation window 25 is provided on the side wall of the swimming tank 1. A first crossbeam 2 and a second crossbeam 3 are respectively provided at both ends of the swimming tank 1. The first crossbeam 2 is equipped with a first traction component 4 connected to the athlete, and the first traction component 4 is equipped with a first force sensor 5 for detecting the traction force of the athlete's swimming. Figure 3 As shown, the second crossbeam 3 is provided with a second traction component 6 connected to the athlete, and the second traction component 6 is provided with a second force sensor 7 for detecting the swimming resistance of the athlete.

[0025] Both the second force sensor 7 and the first force sensor 5 are connected to the control center, which uses the athlete's traction and resistance data to obtain the athlete's net propulsion and propulsion efficiency. Traction refers to the force that propels the athlete forward through the stroke, while resistance is the force of the water flow that hinders the athlete's movement. The athlete is positioned between the first crossbeam 2 and the second crossbeam 3, and both the first traction assembly 4 and the second traction assembly 6 are connected to the athlete's waist belt. The first force sensor 5 detects the athlete's traction during swimming, and the second force sensor 7 detects the athlete's resistance. Based on the athlete's swimming resistance and traction data, the athlete's net propulsion and propulsion efficiency can be obtained. The net propulsion is the difference between traction and resistance, and the propulsion efficiency is the ratio of net propulsion to traction.

[0026] In this invention, the direction of water flow is opposite to the direction of the swimmer's swimming. The speed of the water flow is used to control the swimmer's swimming speed, so that the swimmer's position relative to the swimming pool 1 remains unchanged under a specific exercise intensity. The traction force and resistance of the swimmer can be measured simultaneously and comprehensively evaluated, thereby reflecting the swimmer's physical and technical condition during the swimming process more realistically and comprehensively. This is of great importance for optimizing the swimmer's training plan and competition strategy.

[0027] This technology overcomes the limitations of previous methods that only allowed for strength measurements by strapping athletes to the poolside. In such cases, athletes couldn't simulate the full-body movements of actual swimming, resulting in incomplete data. With the water tank simulation, athletes can be tested under conditions closer to real swimming, making the measurements more realistic and valuable.

[0028] The swimming pool 1 is equipped with a video acquisition device connected to a control center. The video acquisition device collects video data of the swimmers' swimming movements, and the control center uses this data, along with data on the swimmers' movements, resistance, and traction, to develop optimized training plans for them. The video acquisition device includes two video feeds to capture the swimmers' movements from multiple angles.

[0029] In this embodiment, as Figure 1 and Figure 2 As shown, both sides of the swimming tank 1 are provided with fixed protrusions 8, both ends of the first crossbeam 2 are provided with first clamping mechanisms 9 connected to the fixed protrusions 8, and both ends of the second crossbeam 3 are provided with second clamping mechanisms 10 connected to the fixed protrusions 8. The clamping positions of the first clamping mechanisms 9 and the second clamping mechanisms 10 on the fixed protrusions 8 can be adjusted as needed, thereby adjusting the positions of the first crossbeam 2 and the second crossbeam 3.

[0030] Specifically, the first clamping mechanism 9 includes a first outer fixing component and a first inner fixing component, and the fixing protrusion 8 is clamped between the first outer fixing component and the first inner fixing component. For example... Figure 4 As shown, the first outer fixing assembly includes a first outer fixing plate 11, a first outer fixing bolt 12, and a first outer support pad 13. The first outer fixing plate 11 is fixed to the first crossbeam 2. The first outer fixing bolt 12 is threadedly connected to the first outer fixing plate 11. One end of the first outer fixing bolt 12 passes through the first outer fixing plate 11 and presses the first outer support pad 13 against the outside of the fixing protrusion 8. A first outer anti-slip pad 14 is provided on the side of the first outer support pad 13 that contacts the fixing protrusion 8. Figure 5 As shown, the first inner fixing assembly includes a first inner fixing plate 15, a first inner fixing bolt 16, and a first inner support pad 17. The first inner fixing plate 15 is fixed on the first crossbeam 2. The first inner fixing bolt 16 is threadedly connected to the first inner fixing plate 15. One end of the first inner fixing bolt 16 passes through the first inner fixing plate 15 and presses the first inner support pad 17 against the inner side of the fixing protrusion 8. A first inner anti-slip pad 18 is provided on the side of the first inner support pad 17 that contacts the fixing protrusion 8.

[0031] The second clamping mechanism 10 adopts the same structure as the first clamping mechanism 9. Specifically, the second clamping mechanism 10 includes a second outer fixing component and a second inner fixing component, with the fixing protrusion 8 clamped between the second outer fixing component and the second inner fixing component. The second outer fixing component includes a second outer fixing plate, a second outer fixing bolt, and a second outer support pad. The second outer fixing plate is fixed to the second crossbeam 3, and the second outer fixing bolt is threaded to the second outer fixing plate. One end of the second outer fixing bolt passes through the second outer fixing plate and presses the second outer support pad against the outside of the fixing protrusion 8. A second outer anti-slip pad is provided on the side of the second outer support pad that contacts the fixing protrusion 8. The second inner fixing assembly includes a second inner fixing plate, a second inner fixing bolt, and a second inner support pad. The second inner fixing plate is fixed on the second crossbeam 3. The second inner fixing bolt is threadedly connected to the second inner fixing plate. One end of the second inner fixing bolt passes through the second inner fixing plate and presses the second inner support pad against the inner side of the fixing protrusion 8. A second inner anti-slip pad is provided on the side of the second inner support pad that contacts the fixing protrusion 8.

[0032] In one specific implementation, such as Figure 6As shown, the first traction assembly 4 includes a first traction rope, with first hooks 19 at both ends. One first hook 19 is connected to the athlete's waist belt, and the other first hook 19 is connected to a first lug 20. The first lug 20 is connected to a first force sensor 5, which is mounted on the first crossbeam 2 via a first fixing plate 21. The first traction rope includes a first front steel wire rope 22, a first tension spring 23, and a first rear steel wire rope 24. The two ends of the first tension spring 23 are connected to the first front steel wire rope 22 and the first rear steel wire rope 24, respectively.

[0033] The second traction assembly 6 includes a second traction rope, with second hooks at both ends. One second hook is connected to the athlete's waist belt, and the other second hook is connected to a second lifting lug. The second lifting lug is connected to a second force sensor 7, which is mounted on the second crossbeam 3 via a second fixing plate. The second traction rope includes a second front steel wire rope, a second tension spring, and a second rear steel wire rope. The two ends of the second tension spring are connected to the second front steel wire rope and the second rear steel wire rope, respectively.

[0034] The technical solution of the present invention has the following functions: I. Swimming Simulation Environment: To simulate a real swimming environment, the swimming tank 1 is designed to adjust the water flow speed to simulate athletes swimming at different speeds. This simulation environment allows athletes to be tested under relatively controlled conditions, thereby obtaining more accurate data.

[0035] II. Measurement of Traction and Resistance: The system's high-precision force sensors can measure the traction and resistance forces exerted by swimmers in real time. Traction measurement typically involves analyzing the swimmer's arm and leg movements and how these movements affect water flow. Resistance measurement involves considering the swimmer's body shape, posture, and degree of streamline.

[0036] III. Video Recording: During testing, high-definition cameras will be used to record the athletes' swimming movements. These videos can be used not only to analyze the athletes' techniques but also combined with force measurement data to provide a more comprehensive understanding of the athletes' performance in the water. Video analysis can help coaches and athletes identify shortcomings in their techniques, such as stroke efficiency, body rotation, and kicking movements.

[0037] IV. Calculating Net Propulsion and Propulsion Efficiency: Net propulsion is the result of traction minus drag, and it directly relates to an athlete's swimming speed. Propulsion efficiency is the ratio of net propulsion to traction, and it is an important indicator for measuring an athlete's energy utilization efficiency. By analyzing traction and drag data, net propulsion and propulsion efficiency can be calculated, and this data is crucial for optimizing athletes' training plans and competition strategies.

[0038] This embodiment also provides a method for measuring the hydrodynamics of a swimming tank, using the aforementioned swimming tank hydrodynamics measurement system. The method includes: Step A: Control the water flow rate of swimming tank 1 using a water flow rate regulating device; Step B: Use the first force sensor 5 to obtain the traction force of the athlete swimming, and use the second force sensor 7 to obtain the resistance force of the athlete swimming. Step C: Based on the athlete's traction and drag data, the control center obtains the athlete's net propulsion and propulsion efficiency. Step D involves using video capture equipment to collect video data of the athlete's swimming movements. Based on the data on the athlete's swimming movements, swimming resistance, and traction, the control center develops an optimized training plan for the athlete.

[0039] Compared with the prior art, the present invention has the following advantages: I. This invention can simulate the situation when an athlete is swimming, and its measurement results are more realistic; existing technology can only measure in still water.

[0040] Second, this invention can simulate the swimming speed of an athlete; existing technologies cannot simulate this.

[0041] Third, the present invention can measure the traction force and resistance force of an athlete during swimming; the prior art can only measure the traction force and cannot measure the resistance force.

[0042] Fourth, the present invention can obtain the net propulsion force of an athlete; the prior art cannot obtain the net propulsion force of an athlete.

[0043] Fifth, this invention can determine the propulsion efficiency of athletes; existing technologies cannot determine the propulsion efficiency of athletes.

[0044] VI. This invention can simultaneously record two video streams; this is something that existing technologies cannot do.

[0045] 7. This invention can perform segmented analysis of an athlete's swimming movements based on video data; this is something that existing technologies cannot do.

[0046] In the description of this invention, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. They can refer to fixed connections, detachable connections, or integral connections; they can be mechanical or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this invention. Furthermore, the specific features and structures described in the embodiments are included in at least one implementation method. Those skilled in the art can combine features from different implementation methods without contradiction. The scope of protection of this invention is not limited to the specific implementation methods described above. Based on the basic technical concept of this invention, implementation methods that can be conceived by those skilled in the art without creative effort are all within the scope of protection of this invention.

Claims

1. A hydrodynamic measurement system for a swimming tank, comprising a swimming tank (1), wherein the swimming tank (1) is equipped with a water flow velocity regulating device, characterized in that, The water flow speed regulating device is connected to a control center; the swimming pool (1) is provided with a first crossbeam (2) and a second crossbeam (3) at both ends respectively. The first crossbeam (2) is provided with a first traction component (4) connected to the athlete. The first traction component (4) is provided with a first force sensor (5) for detecting the swimming traction force of the athlete. The second crossbeam (3) is provided with a second traction component (6) connected to the athlete. The second traction component (6) is provided with a second force sensor (7) for detecting the swimming resistance of the athlete. The second force sensor (7) and the first force sensor (5) are both connected to the control center. The control center is used to obtain the athlete's net propulsion force and propulsion efficiency based on the athlete's traction force and resistance data. The net propulsion force is the difference between the traction force and the resistance. The propulsion efficiency is the ratio of the traction force to the net propulsion force.

2. The swimming tank hydrodynamic measurement system according to claim 1, characterized in that, The swimming pool (1) is equipped with a video acquisition device, which is connected to the control center. The video acquisition device is used to collect video data of the swimmer's swimming movements, and the control center is used to develop an optimized training plan for the swimmer based on the data of the swimmer's swimming movements, swimming resistance and traction.

3. The swimming tank hydrodynamic measurement system according to claim 1, characterized in that, The swimming pool (1) is provided with fixed protrusions (8) on both sides, and the first crossbeam (2) is provided with a first clamping mechanism (9) connected to the fixed protrusions (8) at both ends, and the second crossbeam (3) is provided with a second clamping mechanism (10) connected to the fixed protrusions (8) at both ends.

4. The swimming tank hydrodynamic measurement system according to claim 3, characterized in that, The first clamping mechanism (9) includes a first outer fixing component and a first inner fixing component, and the fixing protrusion (8) is clamped between the first outer fixing component and the first inner fixing component; The first outer fixing assembly includes a first outer fixing plate (11), a first outer fixing bolt (12), and a first outer support pad (13). The first outer fixing plate (11) is fixed on the first crossbeam (2). The first outer fixing bolt (12) is threadedly connected to the first outer fixing plate (11). One end of the first outer fixing bolt (12) passes through the first outer fixing plate (11) and presses the first outer support pad (13) against the outside of the fixing protrusion (8). A first outer anti-slip pad (14) is provided on the side of the first outer support pad (13) that contacts the fixing protrusion (8). The first inner fixing assembly includes a first inner fixing plate (15), a first inner fixing bolt (16), and a first inner support pad (17). The first inner fixing plate (15) is fixed on the first crossbeam (2). The first inner fixing bolt (16) is threadedly connected to the first inner fixing plate (15). One end of the first inner fixing bolt (16) passes through the first inner fixing plate (15) and presses the first inner support pad (17) against the inner side of the fixing protrusion (8). The side of the first inner support pad (17) that contacts the fixing protrusion (8) is provided with a first inner anti-slip pad (18).

5. The swimming tank hydrodynamic measurement system according to claim 3, characterized in that, The second clamping mechanism (10) includes a second outer fixing component and a second inner fixing component, wherein the fixing protrusion (8) is clamped between the second outer fixing component and the second inner fixing component; The second outer fixing assembly includes a second outer fixing plate, a second outer fixing bolt, and a second outer support pad. The second outer fixing plate is fixed on the second crossbeam (3). The second outer fixing bolt is threaded to the second outer fixing plate. One end of the second outer fixing bolt passes through the second outer fixing plate and presses the second outer support pad against the outside of the fixing protrusion (8). The side of the second outer support pad that contacts the fixing protrusion (8) is provided with a second outer anti-slip pad. The second inner fixing assembly includes a second inner fixing plate, a second inner fixing bolt, and a second inner support pad. The second inner fixing plate is fixed on the second crossbeam (3). The second inner fixing bolt is threadedly connected to the second inner fixing plate. One end of the second inner fixing bolt passes through the second inner fixing plate and presses the second inner support pad against the inner side of the fixing protrusion (8). The side of the second inner support pad that contacts the fixing protrusion (8) is provided with a second inner anti-slip pad.

6. The swimming tank hydrodynamic measurement system according to claim 1, characterized in that, The first traction assembly (4) includes a first traction rope, and both ends of the first traction rope are provided with first hooks (19). One of the first hooks (19) is connected to the waist belt of the athlete, and the other first hook (19) is connected to a first lug (20). The first lug (20) is connected to a first force sensor (5). The first force sensor (5) is installed on the first crossbeam (2) through a first fixing plate (21). The first traction rope includes a first front wire rope (22), a first tension spring (23) and a first rear wire rope (24). The two ends of the first tension spring (23) are connected to the first front wire rope (22) and the first rear wire rope (24) respectively.

7. The swimming tank hydrodynamic measurement system according to claim 1, characterized in that, The second traction component (6) includes a second traction rope, both ends of which are provided with second hooks. One of the second hooks is connected to the waist belt on the athlete's body, and the other second hook is connected to a second lug. The second lug is connected to a second force sensor (7). The second force sensor (7) is installed on the second crossbeam (3) through a second fixing plate. The second traction rope includes a second front steel wire rope, a second tension spring, and a second rear steel wire rope. The two ends of the second tension spring are respectively connected to the second front steel wire rope and the second rear steel wire rope.

8. The swimming tank hydrodynamic measurement system according to claim 1, characterized in that, The side wall of the swimming tank (1) is provided with an observation window (25).

9. A method for measuring the fluid dynamics of a swimming tank, characterized in that, The swimming tank hydrodynamic measurement system according to any one of claims 1-8, wherein the swimming tank hydrodynamic measurement method comprises: Step A: Control the water flow rate in the swimming tank (1); Step B: Use the first force sensor (5) to obtain the athlete's traction force and use the second force sensor (7) to obtain the athlete's resistance force. Step C: Based on the athlete's traction and drag data, obtain the athlete's net propulsion and propulsion efficiency.

10. The method for measuring the hydrodynamics of a swimming tank according to claim 9, characterized in that, It also includes: Step D, collecting video data of the athlete's swimming movements, and developing an optimized training plan for the athlete based on the data of the athlete's swimming movements, swimming resistance and traction.

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