CN112619081A - Intelligent network racket teaching auxiliary system and method and tennis racket - Google Patents
Intelligent network racket teaching auxiliary system and method and tennis racket Download PDFInfo
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- CN112619081A CN112619081A CN202011404956.XA CN202011404956A CN112619081A CN 112619081 A CN112619081 A CN 112619081A CN 202011404956 A CN202011404956 A CN 202011404956A CN 112619081 A CN112619081 A CN 112619081A
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/38—Training appliances or apparatus for special sports for tennis
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/30—Speed
- A63B2220/34—Angular speed
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/40—Acceleration
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Abstract
The invention relates to an intelligent tennis racket teaching auxiliary system, which comprises an acceleration sensor, a gyroscope sensor, a microcontroller module, a server and a trainer, wherein the acceleration sensor measures the real-time acceleration of the swinging direction of a tennis racket when the tennis racket is struck, the gyroscope sensor measures the real-time angular velocity of the swinging direction of the tennis racket, the microcontroller module determines the real-time swinging parameter value of the tennis racket according to the real-time acceleration value and the real-time angular velocity value, the real-time swinging parameter value is sent to the server, the server generates the effective motion track of the tennis racket according to the real-time swinging parameter value in a preset time period, the similarity value of the effective motion track and the standard motion track is calculated, and the trainer can improve the similarity value through continuous exercise so as to achieve the exercise shaping. The invention can improve the tennis practicer to finish the shaping of standard swing action, improve the tennis skill, avoid the occurrence of injury phenomenon and increase the interest of practicing tennis. The invention also relates to an intelligent network racket teaching auxiliary method and a tennis racket.
Description
Technical Field
The invention relates to the technical field of intelligent sports goods, in particular to an intelligent network racket teaching auxiliary system and method and a tennis racket.
Background
The tennis sport is a sports sport which is suitable for people of all ages and full of interest, and is deeply loved by the masses of people. However, tennis has a high requirement on the technical level, which is mainly reflected in the swinging motion of tennis, and if the posture is incorrect, the tennis is easy to fly or cannot be hit to an ideal position, and even the wrist is injured, which is not friendly to the novice.
At present, the learning mode that the tennis was waved is mainly that professional tennis mr records the explanation video, and tennis fan can carry out the imitate of action through the video, seldom has corresponding auxiliary assembly, leads to the action of nonstandard to be hardly found by the practitioner, is unfavorable for the correction of action.
Disclosure of Invention
The invention aims to solve the technical problem of providing an intelligent tennis racket teaching auxiliary system, an intelligent tennis racket teaching auxiliary method and an intelligent tennis racket aiming at the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
an intelligent network racket teaching auxiliary system comprises an intelligent network racket unit and a server, wherein the intelligent network racket unit comprises a microcontroller module, an acceleration sensor, a gyroscope sensor and the server;
the microcontroller module is respectively connected with the acceleration sensor and the gyroscope sensor;
the acceleration sensor is used for measuring the real-time acceleration of the direction of the tennis racket when the tennis racket is slapped and sending the real-time acceleration value to the microcontroller module;
the gyroscope sensor is used for measuring the real-time angular velocity when the tennis racket is swung and slammed, and sending the real-time angular velocity to the microcontroller module;
the microcontroller module is used for determining a real-time swinging parameter value of the tennis racket according to the real-time acceleration value and the real-time angular velocity value, and sending the real-time swinging parameter value to a server, wherein the real-time swinging parameter value comprises a racket handle acceleration, a racket handle speed, a racket head speed and a racket head acceleration;
and the server is used for generating an effective motion track of the tennis racket according to the real-time swing parameter value, calculating a similarity value of the effective motion track and a standard motion track, and determining the grading evaluation grade of the current exercise of the exerciser according to the swing times of the exerciser and the similarity value corresponding to each swing.
The beneficial effects of the system are as follows: an intelligent tennis racket teaching auxiliary system is provided, when a tennis racket strikes a tennis ball, an acceleration sensor measures real-time acceleration of the swinging direction of the tennis racket, a gyroscope sensor measures real-time angular velocity of the swinging of the tennis racket, a microcontroller module determines real-time swinging parameter values of the tennis racket according to the real-time acceleration values and the real-time angular velocity values and sends the real-time swinging parameter values to a server, the server generates effective motion tracks of the tennis racket according to the real-time swinging parameter values in a preset time period, calculates similarity values of the effective motion tracks and standard motion tracks, determines grading evaluation levels of the current practice of a practitioner according to the swinging times of the practitioner and the corresponding similarity values of each swinging time, and enables the practitioner to continuously practice through quantitative evaluation of actions and corresponding times of the current practice of the practitioner, the similarity value is improved, and the exercise shaping effect of the practicer is achieved. The invention can promote the tennis practicer to finish the shaping of the standard swing action, improve the tennis skill, avoid the occurrence of injury phenomenon, increase the interest of practicing tennis, and realize the graded evaluation of the practicer's exercise by quantitatively evaluating the action and times of the practicer.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the microcontroller module is specifically configured to convert the real-time acceleration value into a first acceleration value in a world coordinate system based on the real-time angular velocity value;
and calculating the real-time waving parameter value based on the first acceleration value.
The beneficial effect of adopting the further scheme is that: the real-time acceleration value is converted into a first acceleration value under a world coordinate system through the microcontroller module based on the real-time angular velocity value, and the obtained real-time waving parameter value is calculated based on the first acceleration value, so that the accuracy of the obtained action of the practicer is improved.
Further, the server is specifically configured to convert the real-time swing parameter value into a first coordinate in a world coordinate system, fit the first coordinate to obtain a three-dimensional track, and project the three-dimensional track onto a plane to obtain a two-dimensional track, where the two-dimensional track is a first motion track;
and selecting a first mark point and a second mark point in the first motion track, and intercepting the motion track between the first mark point and the second mark point to obtain an effective motion track.
The beneficial effect of adopting the further scheme is that: and obtaining an effective motion track through the selection of the first mark point and the second mark point, and obtaining the most important motion track in the swinging process.
Further, the server is specifically configured to compare vertical coordinates of all the points in the first motion trajectory, where a point with a maximum value of the vertical coordinates is the first mark point;
from the first marker point, the inflection point that first appears along the first motion track is the second marker point in reverse order of time.
The beneficial effect of adopting the further scheme is that: and effectively acquiring a key motion track of the tennis racket in the swinging process through the acquired second mark point.
Further, the server is specifically configured to calculate a similarity between the coordinates of the effective motion trajectory and the coordinates of the standard motion trajectory by using a distance error formula.
The beneficial effect of adopting the further scheme is that: the similarity between the coordinates of the effective motion track and the coordinates of the standard motion track is calculated by using a distance error formula, so that a tennis practicer can know the error between the action and the standard action, the tennis skill is improved, and the interest of tennis training is also increased.
Further, the system also comprises a power supply module;
the power module adopts a battery power supply module which is used for supplying power.
Further, the system also comprises a radio frequency antenna module;
the radio frequency antenna module is connected with the microcontroller module and used for sending the real-time wave parameter value to the server.
Further, the system also includes a memory;
the memory is used for storing the real-time waving parameter value.
Another technical solution of the present invention for solving the above technical problems is as follows:
an intelligent network racket teaching assistance method, the method comprising:
the acceleration sensor measures the real-time acceleration of the direction of the tennis racket when the tennis racket is swung and slapped when the tennis racket is struck, and sends the real-time acceleration value to the microcontroller module;
the gyroscope sensor measures the real-time angular velocity of the tennis racket when the tennis racket strikes the tennis, and sends the real-time angular velocity to the microcontroller module;
the microcontroller module determines a real-time swinging parameter value of the tennis racket according to the real-time acceleration value and the real-time angular velocity value, and sends the real-time swinging parameter value to a server, wherein the real-time swinging parameter value comprises a racket handle acceleration, a racket handle speed, a racket head speed and a racket head acceleration;
the server generates an effective motion track of the tennis racket according to the real-time swing parameter value in a preset time period, calculates the similarity value of the effective motion track and a standard motion track, and determines the grading evaluation grade of the current exercise of the exerciser according to the swing times of the exerciser and the similarity value corresponding to each swing.
The method has the beneficial effects that: the intelligent tennis racket teaching assisting method includes that when a tennis racket is struck, an acceleration sensor measures real-time acceleration of the swinging direction of the tennis racket, a gyroscope sensor measures real-time angular velocity of the swinging of the tennis racket, a microcontroller module determines real-time swinging parameter values of the tennis racket according to the real-time acceleration values and the real-time angular velocity values and sends the real-time swinging parameter values to a server, the server generates effective motion tracks of the tennis racket according to the real-time swinging parameter values in a preset time period, calculates similarity values of the effective motion tracks and standard motion tracks and determines grading evaluation grades of the current practice of a practitioner according to the swinging times of the practitioner and the similarity values corresponding to the swinging of the practitioner each time. The invention can improve the tennis practicer to finish the shaping of standard swing action, improve the tennis skill, avoid the occurrence of injury phenomenon and increase the interest of practicing tennis.
In addition, the application also provides a tennis racket, which comprises the intelligent network racket unit in the intelligent network racket teaching auxiliary system, wherein the intelligent network racket unit is arranged in the racket or is separately arranged on the racket.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram of an intelligent network racket teaching assistance system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of an intelligent tennis racket teaching assistance method according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
As shown in fig. 1, an intelligent tennis racket teaching assistance system according to an embodiment of the present invention includes an intelligent tennis racket unit and a server, where the intelligent tennis racket unit includes a microcontroller module, an acceleration sensor, a gyroscope sensor, and a server.
And the microcontroller module is respectively connected with the acceleration sensor and the gyroscope sensor.
And the acceleration sensor is used for measuring the real-time acceleration of the direction of the tennis racket when the tennis racket is patted and sending the real-time acceleration value to the microcontroller module.
And the gyroscope sensor is used for measuring the real-time angular velocity when the tennis racket swings and sending the real-time angular velocity to the microcontroller module when the tennis racket strikes the tennis.
And the microcontroller module is used for determining real-time swinging parameter values of the tennis racket according to the real-time acceleration value and the real-time angular velocity value, and sending the real-time swinging parameter values to the server, wherein the real-time swinging parameter values comprise racket handle acceleration, racket handle speed, racket head speed and racket head acceleration.
And the server is used for generating an effective motion track of the tennis racket according to the real-time swing parameter value in a preset time period, calculating the similarity value of the effective motion track and the standard motion track, and determining the grading evaluation grade of the practice of the practitioner this time according to the swing times of the practitioner and the similarity value corresponding to each swing.
It should be understood that the microcontroller module is used for calculating and judging the type of the shot according to the data collected by the acceleration sensor and the gyroscope sensor, such as hitting a ball with great force, killing the ball, catching the ball, drawing the ball, blocking the ball or hanging the ball.
Triaxial acceleration sensor can be chooseed for use to the model of concrete acceleration sensor, and triaxial gyroscope sensor can be chooseed for use to the model of gyroscope sensor, and little control module MCU can choose for use according to actual implementation. This embodiment is not described again in detail for a specific model.
It should be understood that in this exercise, the exerciser may exercise multiple sets of movements, including lifting and short-distance hitting, and the like, and calculate the corresponding similarity value for each movement of the exerciser, and determine the grading evaluation level of this exercise of the exerciser according to the number of movements, such as 100 lifting and 50 short-distance hitting. If the average similarity value of the throwing motion can be calculated according to the similarity value of the throwing motion for 100 times, the average similarity value of the short-distance striking motion is calculated according to the similarity value of the short-distance striking motion for 50 times, quantitative evaluation of all the motions in the exercise is achieved, and the grading evaluation level of the exercise is determined according to the difference value of all the average similarity values and the standard similarity value.
Based on the intelligent tennis racket teaching auxiliary system provided by the embodiment, when a tennis racket strikes a tennis ball, the acceleration sensor measures the real-time acceleration of the swinging direction of the tennis racket, the gyroscope sensor measures the real-time angular velocity of the swinging of the tennis racket, the microcontroller module determines the real-time swinging parameter value of the tennis racket according to the real-time acceleration value and the real-time angular velocity value, and sends the real-time swinging parameter value to the server, the server generates the effective motion track of the tennis racket according to the real-time swinging parameter value in a preset time period, calculates the similarity value of the effective motion track and the standard motion track, determines the grading evaluation grade of the current exercise of the exerciser according to the swinging times of the exerciser and the similarity value corresponding to each swinging time, and quantitatively evaluates the actions and the corresponding times of the current exercise of the exerciser, the trainee can improve the similarity value through continuous exercise, and the exercise shaping effect of the trainee is achieved. The invention can promote the tennis practicer to finish the shaping of the standard swing action, improve the tennis skill, avoid the occurrence of injury phenomenon, increase the interest of practicing tennis, and realize the graded evaluation of the practicer's exercise by quantitatively evaluating the action and times of the practicer.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the microcontroller module is specifically configured to convert the real-time acceleration value into a first acceleration value in a world coordinate system based on the real-time angular velocity value.
And calculating a real-time waving parameter value based on the first acceleration value.
It should be understood that the world coordinate system is an absolute coordinate system of the system, coordinates of all points on the screen before the user coordinate system is not established are determined at the origin of the coordinate system, there are many mathematical methods for converting the real-time angular velocity value into the first acceleration value in the world coordinate system, for example, the first acceleration value in the world coordinate system may be obtained by a rotational-translational matrix, a rotational formula, and a translational formula, the method for calculating the tempo acceleration, the tempo speed, the head speed, and the head acceleration from the first acceleration value may be many, for example, the above-mentioned index values may be calculated according to the following formula, the tempo acceleration may be calculated based on component values of the first acceleration value, the tempo speed may be obtained from the tempo acceleration, the head acceleration may be calculated based on component values of the first acceleration value, and the head acceleration may be calculated according to the tempo acceleration, obtaining the head speed. Wherein, the formula for calculating each component value of the racket handle acceleration according to each component value of the first acceleration value is as follows, wherein B is Sqrt (Ax)2+Ay2+Az2) Ax, Ay, and Az are component values of the first acceleration, respectively, and B is a head acceleration value. And obtaining the speed of the racket handle according to the acceleration of the racket handle and a speed formula. Further, the server is specifically configured to convert the real-time swing parameter value into a first coordinate in a world coordinate system, fit the first coordinate to obtain a three-dimensional track, and project the three-dimensional track onto a plane to obtain a two-dimensional track, where the two-dimensional track is a first motion track.
And selecting a first mark point and a second mark point in the first motion track, and intercepting the motion track between the first mark point and the second mark point to obtain an effective motion track.
Further, the server is specifically configured to compare vertical coordinates of all the points in the first motion trajectory, where a point with a maximum value of the vertical coordinates is the first mark point;
from the first marker point, the inflection point that first appears along the first motion track is the second marker point in reverse order of time.
And further, the server is specifically used for calculating the similarity between the coordinates of the effective motion track and the coordinates of the standard motion track by using a distance error formula.
It should be understood that the real-time swing parameter value is converted into a first coordinate value in a world coordinate system, the obtained multiple coordinate points are fitted, namely the multiple coordinate points are connected through a curve and are subjected to piecewise fitting or spline fitting, a three-dimensional motion track of the swing is obtained, the three-dimensional motion track is projected to a plane to obtain a two-dimensional track, and the two-dimensional track is used as the first motion track.
Obtaining a section of effective motion track by intercepting two mark points in a first motion track, obtaining a first mark point, comparing the vertical coordinates of all the points in the first motion track, selecting a point with the maximum vertical coordinate as the end point of the first motion track, wherein the end point of the first motion track is the first mark point, reversely pushing according to the time sequence from the first mark point, the first inflection point is the initial point of the first motion track and is the second mark point, namely reversely pushing according to the time sequence from the first mark point, comparing the vertical coordinates of two adjacent points, when the coordinate value of the front point is larger than that of the back point, the back point is the inflection point, the value of the back point is the second mark point, intercepting the first motion track to obtain the effective track, and taking the first motion track between the first mark point and the second mark point as the effective track.
It should be understood that, when the distance error formula is used to calculate the similarity between the coordinates of the effective motion track and the coordinates of the standard motion track, the distance error formula is a statistical value of the difference between the Y coordinate values of the effective motion track and the standard motion track when the same X coordinate value is used, or the similarity of the motion tracks of some other methods. The comparison points are uniformly selected on the standard motion track and the effective motion track, and the similarity is calculated by using a distance error formula.
Further, the system also comprises a power supply module;
the power module adopts a battery power supply module which is used for supplying power.
Further, the system also comprises a radio frequency antenna module;
the radio frequency antenna module is connected with the microcontroller module and used for sending the real-time wave parameter values to the server.
Further, the system also includes a memory;
and the memory is used for storing the real-time waving parameter value.
As shown in fig. 2, a flowchart of an intelligent tennis racket teaching assistance method according to another embodiment of the present invention is shown, where the intelligent tennis racket teaching assistance method includes:
110. the acceleration sensor pair measures the real-time acceleration of the tennis racket in the swinging direction when the tennis racket strikes the tennis, and sends the real-time acceleration value to the microcontroller module, and the gyroscope sensor pair measures the real-time angular velocity of the tennis racket in the swinging direction when the tennis racket strikes the tennis, and sends the real-time angular velocity value to the microcontroller module.
120. And the microcontroller module determines a real-time swinging parameter value of the tennis racket according to the real-time acceleration value and the real-time angular velocity value, and sends the real-time swinging parameter value to a server, wherein the real-time swinging parameter value comprises a racket handle acceleration, a racket handle speed, a racket head speed and a racket head acceleration.
130. The server generates an effective motion track of the tennis racket according to the real-time swing parameter value in a preset time period, calculates the similarity value of the effective motion track and a standard motion track, and determines the grading evaluation grade of the current exercise of the exerciser according to the swing times of the exerciser and the similarity value corresponding to each swing.
Based on the intelligent tennis racket teaching auxiliary method provided by the embodiment, when a tennis ball is patted, the acceleration sensor measures the real-time acceleration of the swing direction of the tennis racket, the gyroscope sensor measures the real-time angular velocity of the swing of the tennis racket, the microcontroller module determines the real-time swing parameter value of the tennis racket according to the real-time acceleration value and the real-time angular velocity value, and sends the real-time swing parameter value to the server, and the server generates the effective motion track of the tennis racket according to the real-time swing parameter value in a preset time period, calculates the similarity value of the effective motion track and the standard motion track, and determines the grading measurement grade of the current practice of the practitioner according to the swing times of the practitioner and the similarity value corresponding to each swing. The invention can improve the tennis practicer to finish the shaping of standard swing action, improve the tennis skill, avoid the occurrence of injury phenomenon and increase the interest of practicing tennis.
Further, the microcontroller module converts the real-time acceleration value to a first acceleration value in a world coordinate system based on the real-time angular velocity value;
and calculating the real-time waving parameter value based on the first acceleration value.
Further, the server converts the real-time waving parameter value into a first coordinate in a world coordinate system, fits the first coordinate to obtain a three-dimensional track, and projects the three-dimensional track onto a plane to obtain a two-dimensional track, wherein the two-dimensional track is a first motion track;
and selecting a first mark point and a second mark point in the first motion track, and intercepting the motion track between the first mark point and the second mark point to obtain an effective motion track.
Further, the server is specifically configured to compare vertical coordinates of all the points in the first motion trajectory, where a point with a maximum value of the vertical coordinates is the first mark point;
from the first marker point, the inflection point that first appears along the first motion track is the second marker point in reverse order of time.
Further, the server calculates the similarity between the coordinates of the effective motion trajectory and the coordinates of the standard motion trajectory by using a distance error formula.
In addition, the application also provides a tennis racket, which comprises the intelligent network racket unit in the intelligent network racket teaching auxiliary system, wherein the intelligent network racket unit is arranged in the racket or is separately arranged on the racket.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal system and method can be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal system are merely illustrative, and for example, the division of the modules or units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. An intelligent network racket teaching auxiliary system is characterized by comprising an intelligent network racket unit and a server, wherein the intelligent network racket unit comprises a microcontroller module, an acceleration sensor, a gyroscope sensor and the server;
the microcontroller module is respectively connected with the acceleration sensor and the gyroscope sensor;
the acceleration sensor is used for measuring the real-time acceleration of the direction of the tennis racket when the tennis racket is slapped and sending the real-time acceleration value to the microcontroller module;
the gyroscope sensor is used for measuring the real-time angular velocity when the tennis racket is swung and slammed, and sending the real-time angular velocity to the microcontroller module;
the microcontroller module is used for determining a real-time swinging parameter value of the tennis racket according to the real-time acceleration value and the real-time angular velocity value, and sending the real-time swinging parameter value to a server, wherein the real-time swinging parameter value comprises a racket handle acceleration, a racket handle speed, a racket head speed and a racket head acceleration;
and the server is used for generating an effective motion track of the tennis racket according to the real-time swing parameter value, calculating a similarity value of the effective motion track and a standard motion track, and determining the grading evaluation grade of the current exercise of the exerciser according to the swing times of the exerciser and the similarity value corresponding to each swing.
2. The intelligent tennis racket teaching assistance system of claim 1, wherein:
the microcontroller module is specifically configured to convert the real-time acceleration value into a first acceleration value in a world coordinate system based on the real-time angular velocity value;
and calculating the real-time waving parameter value based on the first acceleration value.
3. The intelligent tennis racket teaching assistance system of claim 1, wherein:
the server is specifically configured to convert the real-time waving parameter value into a first coordinate in a world coordinate system, fit the first coordinate to obtain a three-dimensional track, and project the three-dimensional track onto a plane to obtain a two-dimensional track, where the two-dimensional track is a first motion track;
and selecting a first mark point and a second mark point in the first motion track, and intercepting the motion track between the first mark point and the second mark point to obtain an effective motion track.
4. An intelligent tennis racket teaching assistance system as claimed in claim 3, wherein:
the server is specifically configured to compare vertical coordinates of all the points in the first motion trajectory, where a point with a maximum value of the vertical coordinates is the first mark point;
from the first marker point, the inflection point that first appears along the first motion track is the second marker point in reverse order of time.
5. An intelligent tennis racket teaching assistance system as claimed in claim 4, wherein:
the server is specifically configured to calculate a similarity between the coordinates of the effective motion trajectory and the coordinates of the standard motion trajectory by using a distance error formula.
6. An intelligent network racket teaching assistance system as claimed in any one of claims 1 to 5 wherein said system further comprises a power module;
the power module adopts a battery power supply module which is used for supplying power.
7. The intelligent tennis racket teaching assistance system of claim 6,
the system also includes a radio frequency antenna module;
the radio frequency antenna module is connected with the microcontroller module and used for sending the real-time wave parameter value to the server.
8. The intelligent tennis racket teaching assistance system of claim 6,
the system further includes a memory;
the memory is used for storing the real-time waving parameter value.
9. An intelligent network racket teaching assistance method, based on the intelligent network racket teaching assistance system of any one of claims 1 to 8, the method comprising:
the acceleration sensor measures the real-time acceleration of the direction of the tennis racket when the tennis racket is swung and slapped when the tennis racket is struck, and sends the real-time acceleration value to the microcontroller module;
the gyroscope sensor measures the real-time angular velocity of the tennis racket when the tennis racket strikes the tennis, and sends the real-time angular velocity to the microcontroller module;
the microcontroller module determines a real-time swinging parameter value of the tennis racket according to the real-time acceleration value and the real-time angular velocity value, and sends the real-time swinging parameter value to a server, wherein the real-time swinging parameter value comprises a racket handle acceleration, a racket handle speed, a racket head speed and a racket head acceleration;
the server generates an effective motion track of the tennis racket according to the real-time swing parameter value, calculates the similarity value of the effective motion track and a standard motion track, and determines the grading evaluation grade of the practice of the practitioner this time according to the swing times of the practitioner and the similarity value corresponding to each swing.
10. A tennis racket, comprising: an intelligent tennis racket unit comprising at least one intelligent tennis racket teaching assistance system as claimed in any one of claims 1 to 8, said intelligent tennis racket unit being built into or separately attached to the racket.
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| CN114534225A (en) * | 2022-02-28 | 2022-05-27 | 南京机电职业技术学院 | Tennis auxiliary training system and method |
| IT202100027035A1 (en) | 2021-10-21 | 2023-04-21 | GD8 srls | AUXILIARY DEVICE FOR TENNIS RACKETS, PARTICULARLY FOR LEARNING THE FOREHEND STROKE |
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