Motion monitoring method based on intelligent basketball

Abstract

The invention provides a motion monitoring method based on an intelligent basketball. A motion data acquisition system is arranged in the intelligent basketball; the exercise data acquisition system comprises a data acquisition assembly, a wireless communication module, a processor, a rechargeable battery for supplying power, and a wireless charging module for wirelessly charging the rechargeable battery; the data acquisition assembly acquires motion data of the intelligent basketball and sends the motion data to the processor; the processor receives and processes the motion data, and then sends the motion data to the outside through the wireless communication module; and the external upper computer receives data sent by the wireless communication module to obtain a motion monitoring result of the intelligent basketball. The method comprises the following steps: acquiring multi-dimensional motion data of an athlete in training and competition in real time through a high-precision sensor arranged in the intelligent basketball; and data are synchronized to an upper computer in real time through a wireless transmission technology, so that the scientificity and effectiveness of training and the growth speed of the athlete competitive level can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sports training monitoring, and more particularly to a sports monitoring method based on intelligent basketball. BACKGROUND

[0002] Basketball teaching still follows traditional decomposed training, lacks dynamic scene simulation, and causes technical movements to be disconnected with actual games. Real-time data monitoring is lacking in training, which causes repeated reinforcement of wrong movements. 70% of training plans are not combined with game load data, which causes training intensity to be disconnected with actual combat needs. Current basketball training technology applications mainly include 3D motion capture systems, intelligent wearable devices, biomechanics monitoring, AI tactical simulation, and other technologies.

[0003] The 3D motion capture system on the basketball court is affected by environmental light and shielding, and has poor outdoor site applicability. The intelligent wearable devices, such as wristbands and arm bands, interfere with the movements of athletes, and cannot directly capture basketball movement data.

[0004] The existing technology monitoring subject is an athlete, lacks monitoring of basketball sports from the perspective of a basketball, and the comprehensiveness of monitoring needs to be further expanded. SUMMARY

[0005] To overcome the shortcomings and deficiencies in the prior art, the purpose of the present application is to provide a sports monitoring method based on intelligent basketball. The method collects multi-dimensional movement data of athletes in training and games in real time through high-precision sensors built in the intelligent basketball. The data is transmitted to the upper computer in real time through wireless transmission technology, which is conducive to improving the scientificity and effectiveness of training and the growth speed of athletes' competitive level.

[0006] To achieve the above purpose, the present application is implemented by the following technical solutions: a sports monitoring method based on intelligent basketball, which sets a movement data acquisition system in the intelligent basketball; the movement data acquisition system includes a data acquisition component, a wireless communication module, a processor, a rechargeable battery for power supply, and a wireless charging module for wireless charging of the rechargeable battery;

[0007] The data acquisition component acquires movement data of the intelligent basketball and sends it to the processor. The processor receives the movement data and processes it, and then sends it externally through the wireless communication module. The external upper computer receives the data sent by the wireless communication module to obtain the movement monitoring result of the intelligent basketball.

[0008] Preferably, the data acquisition component includes:

[0009] an inertial sensor for acquiring three-axis angular velocity, three-axis angular velocity acceleration, and three-axis gravity acceleration of the intelligent basketball;

[0010] A thin film pressure sensor for acquiring pressure data;

[0011] A camera module for acquiring video image data;

[0012] The processor encodes the three-axis acceleration, three-axis angular velocity, three-axis gravity acceleration, pressure data and video image data, forms an array, and sends it to the outside;

[0013] After the host computer receives the array, it records the time of receipt, decodes the array to obtain the three-axis acceleration, three-axis angular velocity, three-axis gravity acceleration, pressure data and video image data, and calculates the motion monitoring result of the intelligent basketball.

[0014] Preferably, the motion monitoring result of the intelligent basketball includes the real-time position, real-time speed, attitude description data and heading of the intelligent basketball; wherein the calculation method of the real-time position, real-time speed and attitude description data of the intelligent basketball is:

[0015] Obtain the three-axis angular velocity [ω(t)], three-axis angular velocity acceleration a(t) = [a x (t) a y (t) a z (t)] and three-axis gravity acceleration g = [0 0 g0] output by the inertial sensor at the current time;

[0016] Calculate the rotation matrix R wb (t+Δt) of the basketball coordinate system to the world coordinate system at the t+Δt moment of the intelligent basketball as the attitude description data:

[0017] R wb (t+Δt) = R wb (t) + ΔtR wb (t)[ω(t)]

[0018] Wherein, R wb (t) is the rotation matrix of the basketball coordinate system to the world coordinate system at t moment; Δt is the sampling time of the inertial sensor;

[0019] Calculate the real-time speed v(t+Δt) of the intelligent basketball:

[0020] v(t+Δt) = v(t) + ΔtR wb (t)a(t) - Δtg

[0021] Wherein, v(t) is the speed v(t) of the intelligent basketball at t moment;

[0022] Calculate the real-time position s(t+Δt) of the intelligent basketball in the basketball court:

[0023] s(t+Δt) = s(t) + v(t)Δt

[0024] wherein s(t) is the real-time position of the smart basketball at the t moment in the basketball hall.

[0025] Preferably, the real-time positions of the smart basketball are connected in sequence according to the receiving time to obtain the motion trajectory of the smart basketball, and the motion trajectory of the smart basketball is displayed on the human-computer interaction interface of the upper computer; at each position point of the motion trajectory of the smart basketball, the real-time speed, the attitude description data, the pressure data and the video image data corresponding to the receiving time are associated.

[0026] Preferably, a vibration sensor is further arranged in the smart basketball; when the vibration sensor detects that the smart basketball vibrates, the motion data acquisition system is started; when the vibration sensor detects that the smart basketball does not vibrate, and the non-vibration state lasts for a set time, the motion data acquisition system is hibernated.

[0027] Preferably, the vibration sensor, the inertial sensor, the processor, the wireless communication module, the rechargeable battery and the wireless charging module are integrated together through a circuit board to form an integrated module; the integrated module is arranged in the inner cavity of the smart basketball through a shock-absorbing air bag;

[0028] The shock-absorbing air bag is provided with a through hole; the thin film pressure sensor is arranged in the composite skin of the smart basketball; the connecting line of the thin film pressure sensor passes through the through hole of the shock-absorbing air bag and is connected with the integrated module;

[0029] The composite skin of the smart basketball is provided with a mounting hole corresponding to the position of the through hole of the shock-absorbing air bag; the camera module is embedded in the mounting hole and the through hole to realize fixation; the connecting line of the camera module is connected with the integrated module.

[0030] Preferably, the composite skin of the smart basketball comprises, from inside to outside, an inner container layer, a winding yarn layer, a middle tire layer and an outer skin layer; the thin film pressure sensor is arranged between the inner container layer and the winding yarn layer.

[0031] Preferably, the holes of the through hole and the mounting hole are bonded to realize sealing at the connection between the through hole and the mounting hole; the hole diameter of the mounting hole becomes smaller when extending from inside to outside; the gas in the inner cavity of the smart basketball can be prevented from leaking outward from the connection between the through hole and the mounting hole, the air tightness of the structure inside the basketball is improved; and the positioning and fixation of the lens and the camera module can be reinforced and protected to prevent falling off.

[0032] Preferably, the shock-absorbing air bag comprises an upper air bag and a lower air bag; the edges of the upper air bag and the lower air bag are fixed; the integrated module is wrapped between the upper air bag and the lower air bag.

[0033] Preferably, the upper air bag and the lower air bag form a containing space matched with the size of the integrated module; the integrated module is clamped in the containing space; the edges of the upper air bag and the lower air bag form bonding surfaces respectively; the upper air bag and the lower air bag are fixed by bonding through the bonding surfaces; and the upper air bag and the inner cavity wall of the intelligent basketball are fixed by bonding. The structure can ensure that the integrated module is stably arranged in the shockproof air bag, facilitate processing and manufacturing, and firmly fix the shockproof air bag.

[0034] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0035] The motion monitoring method of the present application can realize real-time collection of multi-dimensional motion data of athletes in training and competition through the high-precision sensor built in the intelligent basketball; the data can be transmitted to the upper computer in real time through wireless transmission technology; the data can be processed and analyzed, which is beneficial to accurately identifying the technical action details of athletes; the technical state of each athlete can be intuitively and clearly mastered by the coach, and a highly personalized training plan can be made, so that the scientificity and effectiveness of training and the growth speed of athletes' competitive level can be significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is the running flowchart of the motion monitoring method based on the intelligent basketball of the present application;

[0037] Figure 2 is the running flowchart of the upper computer of the motion monitoring method based on the intelligent basketball of the present application;

[0038] Figure 3 is the starting flowchart of the motion monitoring method based on the intelligent basketball of the present application;

[0039] Figure 4 is the signal connection relationship diagram of the intelligent basketball of the present application;

[0040] Figure 5 is the structural schematic diagram of the intelligent basketball of the present application;

[0041] Figure 6 is the exploded view of the shockproof air bag of the intelligent basketball of the present application;

[0042] Figure 7 is the structural schematic diagram of the integrated module of the intelligent basketball of the present application;

[0043] Wherein, 1 is an outer skin layer, 2 is a middle tire layer, 3 is a wrapped yarn layer, 4 is an inner liner layer, 5 is a thin film pressure sensor, 6 is a shockproof air bag, 6.1 is an upper air bag, 6.2 is a lower air bag, 6.3 is a bonding surface, 6.4 is a through hole, 7 is a circuit board, 8 is a camera module, 9 is a protective lens, 10 is a connection line of the camera module, 11 is a vibration sensor, 12 is an inertial sensor, 13 is a wireless communication module, 14 is a wireless charging module, and 15 is a rechargeable battery. DETAILED DESCRIPTION

[0044] The application will be described in further detail below with reference to the drawings and specific embodiments.

[0045] Embodiments

[0046] The embodiment is a sports monitoring method based on an intelligent basketball. A sports data acquisition system is arranged in the intelligent basketball. The sports data acquisition system comprises a data acquisition assembly, a wireless communication module 13, a processor, a rechargeable battery 15 for power supply, and a wireless charging module 14 for wireless charging of the rechargeable battery 15.

[0047] The data acquisition assembly comprises:

[0048] an inertial sensor 12 for acquiring three-axis angular velocity, three-axis angular velocity acceleration and three-axis gravity acceleration of the intelligent basketball;

[0049] a thin film pressure sensor 5 for acquiring pressure data;

[0050] a camera module 8 for acquiring video image data;

[0051] and a vibration sensor 11 for detecting vibration signals.

[0052] When the vibration sensor 11 detects vibration of the intelligent basketball, the sports data acquisition system is started, as shown in FIG. 2. Figure 3 After being started, the sports data acquisition system first monitors whether the rechargeable battery is low in voltage. If the rechargeable battery is low in voltage, a buzzer sounds to prompt charging. If the voltage is normal, the sports data acquisition system starts to acquire data. When the vibration sensor 11 detects that the intelligent basketball does not vibrate, and the state of not vibrating lasts for a set time, the sports data acquisition system is hibernated, which can save power consumption of the intelligent basketball and prolong the use time of single charging.

[0053] The data acquisition assembly acquires sports data of the intelligent basketball and sends the sports data to the processor. The processor encodes three-axis acceleration, three-axis angular velocity, three-axis gravity acceleration, pressure data and video image data to form an array and sends the array to the outside through the wireless communication module 13, as shown in FIG. 3. Figure 1

[0054] After receiving the array, the upper computer records the time of receiving the array, decodes the array to acquire three-axis acceleration, three-axis angular velocity, three-axis gravity acceleration, pressure data and video image data, and calculates the sports monitoring result of the intelligent basketball, as shown in FIG. 4. Figure 2

[0055] ​​The accelerometer of the inertial sensor is used to measure the three-axis acceleration of the basketball in the three-dimensional space, and the speed and displacement change can be calculated by integration. The gyroscope of the inertial sensor is used to detect the three-axis angular velocity of the basketball, and is used to determine the attitude angle change. Combining the data of the accelerometer and the gyroscope, the position, speed, attitude and heading of the basketball can be calculated in real time, and real movement data of the basketball player is provided. The thin film pressure sensor provides real-time pressure information of the player's shot and the basketball rebound, and provides effective shot strength information and basketball rebound strength information for the player. The hidden camera sends the real-time basketball movement image to the upper computer, so that the upper computer receives the basketball movement picture in time.

[0056] The obtained accelerometer data is used to measure the linear acceleration data of the basketball in the three-axis direction (X / Y / Z) in the basketball coordinate system (including gravity acceleration and motion acceleration). The obtained gyroscope data is used to measure the angular velocity data of the basketball around the three-axis direction, and is used to calculate the attitude angle change (pitch, roll, yaw). Using the angular velocity data output by the gyroscope, the attitude angle (pitch angle θ, roll angle φ, yaw angle ψ) is calculated by integration, a rotation matrix (such as a direction cosine matrix or a quaternion) is constructed, and the acceleration data is converted from the basketball coordinate system to the basketball court coordinate system. The attitude of the basketball is calculated by integrating the angular velocity to calculate the attitude angle, especially when the basketball is static or uniformly moving, the gravity direction is measured by the accelerometer, the pitch angle and the roll angle are deduced, and the gyroscope and accelerometer data are fused by complementary filtering or Kalman filtering to suppress the cumulative error of the gyroscope. The speed is obtained by integrating the acceleration in the basketball coordinate system once, and the position is obtained by integrating the acceleration in the basketball coordinate system twice, so as to obtain the position and speed of the basketball. The heading of the basketball is obtained by integrating the Z-axis component of the angular velocity.

[0057] The motion monitoring result of the smart basketball includes real-time position, real-time speed, attitude description data and heading of the smart basketball, and the method is: the obtained accelerometer data is used to measure linear acceleration data (including gravity acceleration and motion acceleration) of the basketball in three axial directions (X / Y / Z) in the basketball coordinate system. The obtained gyroscope data is used to measure angular velocity data of the basketball around three axial directions, and is used to calculate attitude angle changes (pitch, roll and yaw). By using the angular velocity data output by the gyroscope, the attitude angle (pitch angle θ, roll angle φ and yaw angle ψ) is calculated by integration, a rotation matrix (such as a direction cosine matrix or a quaternion) is constructed, and the acceleration data is converted from the basketball coordinate system to the basketball court coordinate system. The basketball attitude is calculated by integrating the angular velocity to obtain the attitude angle, especially when the basketball is static or moving at a constant speed, the gravity direction is measured by the accelerometer, the pitch angle and the roll angle are back calculated, the gyroscope data and the accelerometer data are fused by complementary filtering or Kalman filtering, and the cumulative error of the gyroscope is suppressed. The speed is obtained by integrating the acceleration in the basketball coordinate system once, and the position is obtained by integrating the acceleration in the basketball coordinate system twice, so as to obtain the position and speed of the basketball. The heading of the basketball is obtained by integrating the Z-axis component of the angular velocity.

[0058] Specifically, how to calculate the speed and position of the basketball according to the three-axis angular velocity and three-axis acceleration output by the inertial sensor in the smart basketball:

[0059] The desired position, speed and attitude are obtained by the original angular velocity and acceleration, and the specific points are “angular velocity -> attitude”, “acceleration -> speed” and “speed -> position”, and these three cases are obviously an integration problem.

[0060] The rotation matrix is a common attitude description and calculation method, because it can be used to conveniently calculate the vector in the coordinate system. The world coordinate system is w system, which does not rotate with the carrier, and can be used as the basketball court coordinate system in the patent. The carrier coordinate system is b system, which is the basketball coordinate system. The unit orthogonal basis of the carrier coordinate system before rotation in the world coordinate system is (e1, e2, e3), and the unit orthogonal basis of the carrier coordinate system after rotation in the world coordinate system is (e'1, e'2, e'3); there is a vector c in the world coordinate system (which does not rotate with the smart basketball), the coordinates of the vector c in the basketball coordinate system before rotation are [c1, c2, c3] T , and the coordinates of the vector c in the basketball coordinate system after rotation are [c'1, c'2, c'3] T , then there is:

[0061] [e1, e2, e3] [c1, c2, c3] T = [e'1, e'2, e'3] [c'1, c'2, c'3] T ;

[0062] Thus, we can get

[0063]

[0064] wherein R wb represents the rotation matrix of the basketball coordinate system to the world coordinate system;

[0065] The differential equation form of the rotation matrix is

[0066] The difference equation form can be obtained as R wb (t+Δt)=R wb (t)+ΔtR wb (t)[ω(t)];

[0067] wherein Δt is the sampling time of the inertial sensor, which is a constant; R wb (t) is the rotation matrix at time t, [ω(t)] is the three-axis angular velocity output by the inertial sensor in the smart basketball at time t, R wb (t+Δt) is the rotation matrix at time t+Δt, that is, the current attitude description data of the smart basketball.

[0068] The differential equation of the smart basketball speed is

[0069] The difference equation form can be obtained as v(t+Δt)=v(t)+ΔtR wb (t)a(t)-Δtg;

[0070] wherein a(t)=[a x (t) a y (t) a z (t)] is the three-axis angular velocity acceleration output by the inertial sensor in the smart basketball at time t, g=[0 0 g0] is the gravitational acceleration, which is a constant; according to the basketball speed v(t) at time t, the attitude data R wb (t) of the basketball, and the basketball acceleration data a(t), the real-time speed v(t+Δt) of the smart basketball can be obtained.

[0071] The differential equation of the smart basketball position is

[0072] The difference equation form can be obtained as s(t+Δt)=s(t)+v(t)Δt;

[0073] s(t) is the position data of the smart basketball in the basketball court at time t, v(t) is the speed of the basketball at time t, and according to the formula, the real-time position s(t+Δt) of the basketball in the basketball court can be obtained.

[0074] Application of camera: The technical innovation of integrating camera in the basketball body essentially reconstructs the dimension and accuracy of sports data collection, and its core value is reflected in the following three applications:

[0075] First, the technical innovation of game determination. In the out-of-bounds determination scenario, the ball perspective can clearly show the distance between the last touch point and the sideline, eliminating the parallax error of multi-angle external camera. The ball-borne image can capture the continuity of the defense hand intrusion into the ball trajectory, helping the referee to distinguish the critical state of "clean defense" and "hand violation".

[0076] Second, the paradigm upgrade of training effectiveness. Through the ball perspective playback function, athletes can review the attack and defense confrontation in first-person perspective. This embodied cognitive approach greatly improves the tactical understanding efficiency compared to traditional video analysis.

[0077] Third, the dimension breakthrough of watching experience. The image output by the ball camera can generate a 360° freely rotating picture. Combined with the ball-borne sensor data, the live picture can superimpose the real-time motion parameters (such as current speed / velocity / acceleration), allowing the audience to intuitively understand the physical nature of technical movements.

[0078] In order of receiving time, the real-time positions of the smart basketball are connected to obtain the smart basketball motion trajectory, and the motion trajectory is displayed on the human-computer interaction interface of the upper computer. At each position point of the smart basketball motion trajectory, the real-time speed, attitude description data, pressure data, and video image data corresponding to the receiving time are associated.

[0079] The signal connection relationship of the smart basketball is shown in Figure 4 , and the structure is shown in Figures 5 to 7 . The composite skin of the smart basketball includes an inner layer 4, a winding layer 3, a middle layer 2, and an outer skin layer 1 from inside to outside. The thin film pressure sensor 5 is arranged between the inner layer 4 and the winding layer 3. The vibration sensor 11, the inertial sensor 12, the processor, the wireless communication module 13, the rechargeable battery 15, and the wireless charging module 14 are integrated together through the circuit board 7 to form an integrated module. The integrated module is arranged in the inner cavity of the smart basketball through the shock-absorbing air bag 6.

[0080] The shock-absorbing air bag 6 comprises an upper air bag 6.1 and a lower air bag 6.2; the edges of the upper air bag 6.1 and the lower air bag 6.2 are fixed; the integrated module is wrapped between the upper air bag 6.1 and the lower air bag 6.2. A containing space matching the size of the integrated module is formed between the upper air bag 6.1 and the lower air bag 6.2; the integrated module is clamped in the containing space; the edges of the upper air bag 6.1 and the lower air bag 6.2 form bonding surfaces 6.3, respectively; the upper air bag 6.1 and the lower air bag 6.2 are fixed by bonding through the bonding surfaces 6.3; and the upper air bag 6.1 is fixed to the inner cavity wall of the smart basketball by bonding. The structure can ensure that the integrated module is stably arranged in the shock-absorbing air bag 6, facilitate processing and manufacturing, and firmly fix the shock-absorbing air bag 6.

[0081] The shock-absorbing air bag 6 is provided with a through hole 6.4; the thin film pressure sensor 5 is arranged in the composite skin of the smart basketball; the connecting line of the thin film pressure sensor 5 passes through the through hole 6.4 of the shock-absorbing air bag 6 and is connected with the integrated module; the composite skin of the smart basketball is provided with a mounting hole corresponding to the position of the through hole 6.4 of the shock-absorbing air bag 6; the camera module 8 is embedded in the mounting hole and the through hole 6.4 to be fixed; and the connecting line 10 of the camera module 8 is connected with the integrated module.

[0082] The hole edges of the through hole 6.4 and the mounting hole are bonded to seal the connection between the through hole 6.4 and the mounting hole; the hole diameter of the mounting hole decreases from inside to outside; the gas in the inner cavity of the smart basketball can be prevented from leaking outward from the connection between the through hole 6.4 and the mounting hole, the air tightness of the structure inside the basketball is improved; and the positioning and fixing of the lens 9 and the camera module 8 can be reinforced and protected to prevent falling off.

[0083] The smart basketball can collect sports data and send it outward; the electronic devices are all arranged inside the smart basketball, without changing the surface texture of the basketball and damaging the feel of the basketball, and without the risk of falling off; the shock-absorbing air bag is used to wrap the devices, which can protect the internal devices, reduce the vibration impact on the devices during sports, improve the reliability and safety of the operation of the devices, and prolong the service life of the devices; on the other hand, the vibration of the devices can also prevent the reverse impact on the ball body, avoiding interference with the basketball movement.

[0084] The above embodiments are the preferred embodiments of the present application, but the embodiments of the present application are not limited to the above embodiments, and any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present application shall be equivalent replacement modes and shall be included in the protection scope of the present application.

Claims

1. A motion monitoring method based on intelligent basketball, characterized in that: By setting up a motion data acquisition system in a smart basketball; the motion data acquisition system includes a data acquisition component, a wireless communication module, a processor, a rechargeable battery for power supply, and a wireless charging module for wirelessly charging the rechargeable battery; The data acquisition component collects motion data from the smart basketball and sends it to the processor; the processor receives the motion data, processes it, and then sends it to the outside via the wireless communication module; the external host computer receives the data sent by the wireless communication module and obtains the motion monitoring results of the smart basketball.

2. The motion monitoring method based on intelligent basketball according to claim 1, characterized in that: The data acquisition component includes: Inertial sensors are used to acquire the three-axis angular velocity, three-axis angular velocity acceleration, and three-axis gravitational acceleration of the smart basketball. Thin-film pressure sensors are used to acquire pressure data; And a camera module, used to acquire video image data; The processor encodes triaxial acceleration, triaxial angular velocity, triaxial gravitational acceleration, pressure data, and video image data into an array, which is then sent to the outside. After receiving the array, the host computer records the receiving time, decodes the array to obtain triaxial acceleration, triaxial angular velocity, triaxial gravitational acceleration, pressure data and video image data, and calculates the motion monitoring results of the smart basketball.

3. The motion monitoring method based on intelligent basketball according to claim 2, characterized in that: The motion monitoring results of the intelligent basketball include its real-time position, real-time speed, attitude description data, and heading; wherein, the calculation method for the intelligent basketball's real-time position, real-time speed, and attitude description data is as follows: Obtain the current output of the inertial sensor: triaxial angular velocity [ω(t)], triaxial angular velocity acceleration a(t) = [a x (t) a y (t) a z (t)], and triaxial gravitational acceleration g=[0 0 g0]; Calculate the rotation matrix R from the basketball coordinate system to the world coordinate system at time t+Δt in the smart basketball. wb (t+△t) is used as attitude description data: R wb (t+△t)=R wb (t)+△tR wb (t)[ω(t)] Among them, R wb (t) is the rotation matrix from the basketball coordinate system to the world coordinate system at time t; △t is the sampling time of the inertial sensor; Calculate the real-time velocity v(t+Δt) of the intelligent basketball: v(t+△t)=v(t)+△tR wb (t)a(t)-△tg Where v(t) is the speed of the smart basketball at time t; Calculate the real-time position s(t+Δt) of the smart basketball in the basketball court: s(t+Δt)=s(t)+v(t)Δt Where s(t) is the real-time location of the smart basketball in the basketball court at time t.

4. The motion monitoring method based on intelligent basketball according to claim 3, characterized in that: The real-time positions of the smart basketball are connected in the order of reception time to obtain the trajectory of the smart basketball, which is then displayed on the human-computer interaction interface of the host computer. At each position point of the smart basketball's trajectory, the real-time speed, posture description data, pressure data, and video image data corresponding to the reception time are associated.

5. The motion monitoring method based on intelligent basketball according to claim 2, characterized in that: The smart basketball is also equipped with a vibration sensor; when the vibration sensor detects that the smart basketball is vibrating, the motion data acquisition system is activated; when the vibration sensor detects that the smart basketball is not vibrating, and the non-vibration state continues for a set time, the motion data acquisition system goes into sleep mode.

6. The motion monitoring method based on intelligent basketball according to claim 5, characterized in that: The vibration sensor, inertial sensor, processor, wireless communication module, rechargeable battery, and wireless charging module are integrated together via a circuit board to form an integrated module; the integrated module is housed within the cavity of the smart basketball via shock-absorbing airbags. The shock-absorbing airbag is provided with a through hole; the thin-film pressure sensor is installed in the composite skin of the smart basketball; the connecting wire of the thin-film pressure sensor passes through the through hole of the shock-absorbing airbag and connects to the integrated module. The composite outer skin of the smart basketball has mounting holes corresponding to the positions of the shock-absorbing airbag penetration holes; the camera module is embedded in the mounting holes and penetration holes for fixation; the connecting wire of the camera module is connected to the integrated module.

7. The motion monitoring method based on intelligent basketball according to claim 6, characterized in that: The composite outer skin of the smart basketball includes, from the inside out, an inner bladder layer, a yarn layer, a middle tire layer, and an outer skin layer; the thin-film pressure sensor is disposed between the inner bladder layer and the yarn layer.

8. The motion monitoring method based on intelligent basketball according to claim 6, characterized in that: The edges of the through hole and the mounting hole are glued together to achieve a seal at the connection between the through hole and the mounting hole; the diameter of the mounting hole decreases as it extends from the inside to the outside.

9. The motion monitoring method based on intelligent basketball according to claim 6, characterized in that: The shock-absorbing airbag includes an upper airbag and a lower airbag; the edges of the upper airbag and the lower airbag are fixed; the integrated module is wrapped between the upper airbag and the lower airbag.

10. The motion monitoring method based on intelligent basketball according to claim 9, characterized in that: The upper and lower airbags form a receiving space that matches the size of the integrated module; the integrated module is clamped in the receiving space; the edges of the upper and lower airbags respectively form adhesive surfaces; the upper and lower airbags are fixed by adhesive bonding; the upper airbag is fixed to the inner wall of the smart basketball by adhesive bonding.

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