CN111317982A - Intelligent man-machine interaction system for tennis stadium for blind people - Google Patents
Intelligent man-machine interaction system for tennis stadium for blind people Download PDFInfo
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- CN111317982A CN111317982A CN202010114645.3A CN202010114645A CN111317982A CN 111317982 A CN111317982 A CN 111317982A CN 202010114645 A CN202010114645 A CN 202010114645A CN 111317982 A CN111317982 A CN 111317982A
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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
- A63B61/00—Tennis nets or accessories for tennis or like games, e.g. volley-ball
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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
- A63B71/0009—Games or sports accessories not covered in groups A63B1/00 - A63B69/00 for handicapped persons
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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
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/0009—Games or sports accessories not covered in groups A63B1/00 - A63B69/00 for handicapped persons
- A63B2071/0027—Games or sports accessories not covered in groups A63B1/00 - A63B69/00 for handicapped persons visually handicapped
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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
- A63B2220/80—Special sensors, transducers or devices therefor
- A63B2220/806—Video cameras
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Abstract
The invention discloses an intelligent man-machine interaction system for a tennis stadium for the blind, which comprises 2 pairs of wireless earplug type sport earphones, 4 wide-angle cameras, an STM32 type single chip microcomputer adopting an RT-Thread system, a tennis cap with an arrow of a special color, and a tennis with a special color and a sound source, wherein the intelligent man-machine interaction system for the tennis stadium for the blind is provided with 2 pairs of wireless earplug type sport earphones, 4 wide-angle cameras, the STM32 type single chip microcomputer adopting the RT-Thread system, the tennis cap with the arrow of the special color, and the tennis with the special color and the sound source.
Description
Technical Field
The invention relates to the technical field of intelligent man-machine interaction systems for tennis stadiums for blind people, in particular to an intelligent man-machine interaction system for tennis stadiums for blind people.
Background
Due to the visual impairment, most of ball games for the blind are planar games, such as croquet, table tennis and the like. However, in recent years, tennis for the blind has been developed in japan and korea, and the limitation of visual disturbance has been broken. The three-dimensional sports are beneficial to the blind to exercise all parts of the body, develop the coordination ability of sports, and strive for strong self-confidence and the like.
At present, the existing tennis stadium for the blind in China is mostly positioned and tracked in a mode of wearing a sensor on the body of the blind. However, the existence of the sensor inevitably causes inconvenience to the blind when the blind moves, most of the sensors are bound in order to prevent the sensors from falling off during the movement, the blind is inevitably uncomfortable after long-term use, and the blind can be injured by the sensors mounted on the body when the blind falls down easily during the movement. Therefore, the project of tennis for the blind is still unknown.
Disclosure of Invention
The invention aims to provide an intelligent man-machine interaction system for a tennis stadium for the blind, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the intelligent man-machine interaction system for the tennis stadium for the blind is provided with 2 pairs of wireless earplug type sports earphones, 4 wide-angle cameras, an STM32 type single chip microcomputer adopting an RT-Thread system, a tennis cap with an arrow of a special color and a tennis ball with a sound source.
Preferably, the tennis court of the intelligent man-machine interaction system for the blind person tennis stadium is virtually divided into 9 numbered areas, the other area is divided into 9 numbered areas in the same mirror image mode, two cameras are arranged on two half fields respectively, one camera is hung above the center of the half field through a cantilever, the other camera is fixed at the center of the side face of the half field, and the intelligent man-machine interaction system for the blind person tennis stadium adopts an STM32 single chip microcomputer of an RT-Thread system and is internally provided with a wireless module.
Preferably, a power supply, a pressure type switch and a buzzer are arranged in the tennis ball.
Preferably, the tennis cap is white overall, an arrow which is consistent with the color of the sportswear worn by the blind athletes is arranged on the brim of the tennis cap, and the arrow faces to the right front.
Preferably, the intelligent tennis man-machine interaction system with the sound source for the tennis stadium for the blind comprises the following steps:
A. two tennis players for the blind wear sports coats with different colors respectively, wear tennis caps with arrows with special colors, and wear wireless earplug type sports earphones to be positioned on a tennis court; tennis with special color and sound source is used for sports;
B. after the movement starts, cameras at different positions start to acquire image information and are processed by an STM32 single chip microcomputer to obtain the position information of the current blind person player and the movement information of the tennis ball, the movement track of the tennis ball is predicted, the blind person player is prompted to arrive at a touchdown area through a wireless earphone according to the position information of the blind person player at the moment, and after the blind person player arrives, the movement track of the tennis ball can be judged by listening the sound of a sound source built in the tennis ball, so that the player can swing to play the ball, and in addition, the system can judge whether violation occurs according to the movement information of the tennis ball and carry out voice;
C. when the tennis is hit by the racket or touches the ground, the pressure switch is pressed to be turned on, the buzzer sounds, and the blind athletes can judge the specific motion track of the tennis according to the buzzing sound and hit the racket.
Preferably, the intelligent man-machine interaction system for the tennis stadium for the blind is provided with 2 pairs of wireless earplug type sport earphones, 4 wide-angle cameras, an STM32 type single chip microcomputer adopting an RT-Thread system, a tennis cap with an arrow of a special color and a tennis ball of the special color.
Preferably, the system regulation and control method of the intelligent man-machine interaction system for the tennis stadium for the blind comprises the following steps:
A. two tennis players for the blind wear sports coats with different colors respectively, wear tennis caps with arrows with special colors, wear wireless earplug type sports earphones and locate on a tennis court, and use tennis with special color to carry out sports;
B. after the movement starts, cameras at different positions start to acquire image information and are processed by an STM32 single chip microcomputer to obtain the position information of the current blind athletes and the movement information of the tennis ball, and the movement track of the tennis ball is predicted;
C. then according to the position information of the blind athletes, the blind athletes are prompted to arrive at a touchdown area through a wireless earphone, and after the blind athletes arrive, according to the motion track of the current tennis ball, a prerecorded monophonic 'drip-drip' prompt sound file is extracted by an STM32 single chip microcomputer, and fast Fourier transform is carried out on the prerecorded monophonic 'drip-drip' prompt sound file;
D. then, according to the predicted motion track of the tennis ball and the current position of the blind person athlete, the azimuth angle, the elevation angle and the distance of the virtual sound source relative to the blind person athlete are solved, and the data are substituted into a head transfer function to carry out fast Fourier transform on the head transfer function;
E. multiplying the two signals, performing fast Fourier inverse transformation, and converting the single-channel prompt sound into a virtual stereo sound;
F. and generating virtual stereo sound to be sent to the wireless earphone to prompt the motion state of the tennis ball of the blind athletes.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention provides tennis information for blind athletes by adopting a machine vision method and combining a built-in sound source or a virtual stereo mode, so that the prompted position information is more accurate;
(2) the invention only needs to wear the earphone, so that the blind athletes are more comfortable;
(3) the equipment adopted by the system is common equipment on the market or is modified by adding some common modules, so that the production cost of the equipment is reduced;
(4) the camera is adopted to obtain the required information, so that the blind person athlete is not in direct contact with the camera, and the stability is higher;
(5) the positions and the states of the blind athletes and the tennis balls can be automatically acquired, the blind athletes can be intelligently prompted to move according to the positions and the states, whether the rules are violated or not can be judged, and the intelligent degree is high;
(6) the intelligent man-machine interaction system for the tennis stadium for the blind adopts multi-camera multi-angle detection and positioning, and the wireless earphone prompts relevant information of blind athletes in voice, so that the prompt is accurate, the sport is comfortable, the cost is low, the intelligent degree is high, and the tennis sport for the blind is convenient.
Drawings
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a block diagram of the general working principle of the present invention;
FIG. 3 is a schematic view of a tennis cap of the present invention;
FIG. 4 is a schematic view of a tennis ball according to the present invention;
fig. 5 is a schematic block diagram of the present invention for generating virtual stereo sound.
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 only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
The invention provides a technical scheme that: an intelligent man-machine interaction system for a tennis stadium for the blind is provided with 2 pairs of wireless earplug type sports earphones, 4 wide-angle cameras, an STM32 type single chip microcomputer adopting an RT-Thread system, a tennis cap with an arrow of a special color and a tennis with a sound source.
A tennis court of a blind person tennis court intelligent man-machine interaction system is virtually divided into 9 regions with numbers, the other region is divided into 9 regions with numbers in the same mirror image mode, two cameras are arranged on two half fields respectively, one camera is hung above the center of the half field through a cantilever, the other camera is fixed at the center of the side face of the half field, the blind person tennis court intelligent man-machine interaction system adopts an STM32 single chip microcomputer of an RT-Thread system and is internally provided with a wireless module, a power supply, a pressure type switch and a buzzer are arranged in a tennis ball, the whole tennis cap is white, an arrow which is consistent with the color of sportswear worn by blind persons is arranged on the brim of the tennis ball, and the arrow faces to the front.
A tennis intelligent man-machine interaction system with a sound source for a tennis stadium for the blind comprises the following steps:
A. two tennis players for the blind wear sports coats with different colors respectively, wear tennis caps with arrows with special colors, and wear wireless earplug type sports earphones to be positioned on a tennis court; tennis with special color and sound source is used for sports;
B. after the movement starts, cameras at different positions start to acquire image information and are processed by an STM32 single chip microcomputer to obtain the position information of the current blind person player and the movement information of the tennis ball, the movement track of the tennis ball is predicted, the blind person player is prompted to arrive at a touchdown area through a wireless earphone according to the position information of the blind person player at the moment, and after the blind person player arrives, the movement track of the tennis ball can be judged by listening the sound of a sound source built in the tennis ball, so that the player can swing to play the ball, and in addition, the system can judge whether violation occurs according to the movement information of the tennis ball and carry out voice;
C. when the tennis is hit by the racket or touches the ground, the pressure switch is pressed to be turned on, the buzzer sounds, and the blind athletes can judge the specific motion track of the tennis according to the buzzing sound and hit the racket.
The intelligent man-machine interaction system for the tennis stadium for the blind is provided with 2 pairs of wireless earplug type sport earphones, 4 wide-angle cameras, an STM32 type single chip microcomputer adopting an RT-Thread system, a tennis cap with an arrow of a special color and a tennis ball of the special color.
An intelligent man-machine interaction system for a tennis stadium for the blind comprises the following steps:
A. two tennis players for the blind wear sports coats with different colors respectively, wear tennis caps with arrows with special colors, wear wireless earplug type sports earphones and locate on a tennis court, and use tennis with special color to carry out sports;
B. after the movement starts, cameras at different positions start to acquire image information and are processed by an STM32 single chip microcomputer to obtain the position information of the current blind athletes and the movement information of the tennis ball, and the movement track of the tennis ball is predicted;
C. then according to the position information of the blind athletes, the blind athletes are prompted to arrive at a touchdown area through a wireless earphone, and after the blind athletes arrive, according to the motion track of the current tennis ball, a prerecorded monophonic 'drip-drip' prompt sound file is extracted by an STM32 single chip microcomputer, and fast Fourier transform is carried out on the prerecorded monophonic 'drip-drip' prompt sound file;
D. then, according to the predicted motion track of the tennis ball and the current position of the blind person athlete, the azimuth angle, the elevation angle and the distance of the virtual sound source relative to the blind person athlete are solved, and the data are substituted into a head transfer function to carry out fast Fourier transform on the head transfer function;
E. multiplying the two signals, performing fast Fourier inverse transformation, and converting the single-channel prompt sound into a virtual stereo sound;
F. and generating virtual stereo sound to be sent to the wireless earphone to prompt the motion state of the tennis ball of the blind athletes.
In the case of the example 1, the following examples are given,
an intelligent man-machine interaction system for a tennis stadium for the blind comprises 2 pairs of wireless earplug type sport earphones, 4 wide-angle cameras, an STM32 type single chip microcomputer adopting an RT-Thread system, a tennis cap with an arrow of a specific color and a tennis ball with a special color and a sound source.
As shown in figures 1-4, two blind tennis players wear sportswear of different colors respectively, wear the tennis cap with special color arrow, wear wireless earplug type sport earphones and locate on the tennis court, use the tennis of special color to carry on the sports, one of them tennis court is divided into 9 areas with numbers virtually, another party is the same mirror image and is divided into 9 areas with numbers, two half fields of both sides have two cameras respectively, one of them uses the cantilever to hang above the center of half field, another is fixed in the center of the side of half field, the STM32 singlechip that adopts RT-Thread system has built-in wireless module.
The system is initialized at the beginning, then the camera is started to acquire image information, and the motion information of the blind athletes and the tennis balls on the tennis court is analyzed in an image processing mode. For the position information of the blind players, the position of the blind players is obtained by the camera positioned above the half field center, the front orientation of the blind players is judged by an arrow with a special color on the tennis cap and is summarized to the STM32 single chip microcomputer, for the motion information of the tennis, the camera positioned above the half field center obtains the motion information of the tennis on the horizontal plane, the camera on the side surface of the tennis court obtains the motion information of the tennis in the vertical direction, the three-dimensional motion information of the tennis is obtained by the STM32 single chip microcomputer, and the STM32 type single chip microcomputer of the RT-Thread system can be used for multi-Thread operation, so that in the operation process of the system, the camera continuously obtains image information, the STM32 single chip microcomputer also continuously performs image processing, and the position information of the current blind players and the motion information of the tennis are obtained in real time. When the system is initialized, firstly, the blind players are waited for service, after the service, the motion track of the tennis from service to first touchdown is predicted according to the motion information of the tennis, whether the rules are met is judged firstly, if the unlawful conditions such as that the tennis is not sent out, the tennis does not cross the net, the tennis is touched, the tennis is out of the border and the like occur, the blind players are prompted through a wireless earplug type motion earphone in a voice mode, the score is scored and the service is sent again, if the unlawful conditions do not occur, the distance between the first touchdown position of the tennis and the border and the distance between the tennis and the current blind players are calculated, if any one of the two distances is close, the blind players are prompted to go to the first touchdown position to catch the tennis, if the two distances are far, the motion track from the first touchdown to the second touchdown is predicted again, the blind players are prompted to go to the second, and prompting the blind players to stop moving, scoring and serve again through wireless earplug type motion earphones, judging the specific motion track of the tennis and swinging the tennis through hearing the prompting sound of a sound source built in the tennis if the blind players successfully reach the designated area, finally judging whether a finishing condition is met, if so, finishing the operation, and otherwise, returning to wait for serving.
When the blind athlete is prompted to go to a designated area, the relative position information of the blind athlete is obtained according to the position of the designated area and the position information of the current blind athlete, the number of the current position area of the blind athlete, the number of the designated area, the moving direction and angle and the number of the current position area of an opponent are prompted through a plug type motion earphone in a voice mode, so that the blind athlete can be accelerated and decelerated properly when moving, the direction is corrected, the swing direction when receiving a ball is considered, and the like, such as voice prompt 8, 6, right front, left 45 and 5, the blind athlete is currently in the No. 8 area and needs to move to the No. 6 area, the moving direction is right front, the front face is moved to the direction facing the net and needs to be turned left by 45 degrees, and the oppo.
The tennis cap with the arrow of the specific color is white overall, the brim of the tennis cap is provided with the arrow which has the same color with the sportswear worn by the blind athletes, and the arrow faces to the right front. When the blind person sportsman is in sports, the STM32 single chip microcomputer can acquire images through the camera positioned above the center of the half court when needing to wear the tennis cap, the positions of different blind person sportsman can be obtained through different colors, and the front orientation of the blind person sportsman can be obtained through the orientation of the arrow.
The structure diagram of the tennis ball with the special color and the sound source is characterized in that the outer surface of the tennis ball is coated with the special color, so that an STM32 single chip microcomputer can conveniently acquire motion information of the tennis ball through a camera, the inner part of the tennis ball consists of a power supply, a pressure type switch and a buzzer, when the tennis ball is swung and struck or touches the ground, the pressure type switch is pressed to be turned on, the buzzer sounds, and a blind player can judge the specific motion track of the tennis ball according to the buzzer and swing and strike the ball.
In the case of the example 2, the following examples are given,
an intelligent man-machine interaction system for a tennis stadium for the blind comprises 2 pairs of wireless earplug type sport earphones, 4 wide-angle cameras, an STM32 type single chip microcomputer adopting an RT-Thread system, a tennis cap with an arrow of a special color and tennis balls of a special color.
Two blind person tennis players wear the sportswear of different colours respectively, wear the tennis cap of special colour arrow point, wear wireless earplug formula motion earphone and be located the tennis court, use the tennis of special colour to carry out the motion, the tennis court of one of them is divided into the region of 9 areas of taking the serial number virtually, the other party is the region of dividing into 9 areas of taking the serial number of same mirror image, half two cameras on both sides respectively, one of them uses the cantilever to hang in the middle of this half, another is then fixed in this half side center, the STM32 singlechip that adopts RT-Thread system has built-in wireless module.
The system is initialized at the beginning, then the camera is started to obtain image information, the motion information of a blind player and a tennis ball on a tennis court is analyzed in an image processing mode, the position information of the blind player is obtained by the camera positioned above the center of the half court, the front orientation of the player is judged by an arrow with a special color on a tennis cap and is collected to an STM32 single chip microcomputer, for the motion information of the tennis ball, the camera positioned above the center of the half court obtains the motion information of the tennis ball on a horizontal plane, the camera positioned on the side surface of the tennis court obtains the motion information of the tennis ball in a vertical direction, the three-dimensional motion information of the tennis ball is obtained by the STM32 single chip microcomputer, and the STM32 type single chip microcomputer adopting an RT-Thread system can carry out multi-Thread operation, so that the camera continuously obtains the image information in the running process of the system, and the STM32 single chip microcomputer carries out image processing continuously, obtaining the position information of the current blind player and the motion information of tennis ball in real time, when the system initialization is finished, waiting for the blind player to serve, predicting the motion track of the tennis ball from serving to first touchdown according to the motion information of the tennis ball, firstly judging whether the rules are met, if the tennis ball is not sent, the blind player is not passed through the net, the tennis ball is touched, the tennis ball is out of bounds and other violations occur, prompting the blind player through a wireless earplug type motion earphone for voice prompt, scoring and re-serving, if the violations do not occur, calculating the distance between the first touchdown position of the tennis ball and the boundary and the distance between the tennis ball and the current blind player, if any one of the two distances is close, prompting the blind player to take the ball at the first touchdown position, if the two distances are far, predicting the motion track from first touchdown to second touchdown of the tennis ball, prompting the blind player to take the second touchdown position, if the blind athlete does not reach the designated area before the tennis touches the ground, the wireless earplug type motion earphone prompts the blind athlete to stop moving, scores and serve the tennis again, if the blind athlete successfully reaches the designated area, the blind athlete can judge the specific motion track of the tennis and play the tennis by listening to the prompt sound of the built-in sound source of the tennis, finally, whether the conditions for finishing the tennis are met is judged, if yes, the operation is finished, and if not, the operation returns to wait for serving the tennis.
As shown in figure 5, in reality, sound emitted by a certain sound source is transmitted to human ears, because the human ears are positioned on the left and the right of the body, the two ears receive the loudness and the phase of the same sound source, the brain judges the specific position of the sound source through the difference, therefore, if the left and the right sound channels of the wireless earplug type motion earphone play specific stereo sound, the brain can judge the position of a virtual sound source, firstly, an STM32 single chip microcomputer extracts a prerecorded monophonic 'drop-drop' prompting sound file, carries out fast Fourier transform on the file, then, the azimuth angle, the elevation angle and the distance of the virtual sound source relative to a blind player are obtained according to the predicted motion track of tennis balls and the current position of the blind player, then, the data are substituted into a human head transfer function, the fast Fourier transform is carried out on the data in the same way, and then the data are multiplied and subjected to fast, the single-channel prompt sound can be converted into virtual stereo, and finally the stereo is played through the wireless earplug type motion earphones, so that the tennis ball can prompt the blind athletes to play the specific motion track, and the blind athletes can swing conveniently.
The intelligent man-machine interaction system for the tennis stadium for the blind adopts multi-camera multi-angle detection and positioning, and the wireless earphone prompts relevant information of blind athletes in voice, so that the prompt is accurate, the sport is comfortable, the cost is low, the intelligent degree is high, and the tennis sport for the blind is convenient.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a blind person tennis stadium intelligence man-machine interactive system which characterized in that: the intelligent man-machine interaction system for the tennis stadium for the blind is provided with 2 pairs of wireless earplug type sport earphones, 4 wide-angle cameras, an STM32 type single chip microcomputer adopting an RT-Thread system, a tennis cap with an arrow of a special color and a tennis ball with a sound source.
2. The intelligent man-machine interaction system for the tennis stadium for the blind as claimed in claim 1, wherein: the tennis court of the intelligent man-machine interaction system for the blind person tennis stadium is virtually divided into 9 regions with numbers, the other region is divided into 9 regions with numbers in the same mirror image mode, two cameras are arranged on two half fields respectively, one camera is hung above the center of the half field through a cantilever, the other camera is fixed at the center of the side face of the half field, and the intelligent man-machine interaction system for the blind person tennis stadium adopts an STM32 single chip microcomputer of an RT-Thread system and is internally provided with a wireless module.
3. The intelligent man-machine interaction system for the tennis stadium for the blind as claimed in claim 1, wherein: the tennis ball is internally provided with a power supply, a pressure switch and a buzzer.
4. The intelligent man-machine interaction system for the tennis stadium for the blind as claimed in claim 1, wherein: the tennis cap is white overall, arrows with the same color as the sportswear worn by the blind athletes are arranged on the brim of the tennis cap, and the arrows face to the front.
5. The intelligent man-machine interaction system for tennis with a sound source for a blind person tennis court, which is described in claim 1, is implemented, wherein the system regulation and control method comprises the following steps:
A. two tennis players for the blind wear sports coats with different colors respectively, wear tennis caps with arrows with special colors, and wear wireless earplug type sports earphones to be positioned on a tennis court; tennis with special color and sound source is used for sports;
B. after the movement starts, cameras at different positions start to acquire image information and are processed by an STM32 single chip microcomputer to obtain the position information of the current blind person player and the movement information of the tennis ball, the movement track of the tennis ball is predicted, the blind person player is prompted to arrive at a touchdown area through a wireless earphone according to the position information of the blind person player at the moment, and after the blind person player arrives, the movement track of the tennis ball can be judged by listening the sound of a sound source built in the tennis ball, so that the player can swing to play the ball, and in addition, the system can judge whether violation occurs according to the movement information of the tennis ball and carry out voice;
C. when the tennis is hit by the racket or touches the ground, the pressure switch is pressed to be turned on, the buzzer sounds, and the blind athletes can judge the specific motion track of the tennis according to the buzzing sound and hit the racket.
6. The intelligent man-machine interaction system for the tennis stadium for the blind as claimed in claim 1, wherein: the intelligent man-machine interaction system for the tennis stadium for the blind is provided with 2 pairs of wireless earplug type sport earphones, 4 wide-angle cameras, an STM32 type single chip microcomputer adopting an RT-Thread system, a tennis cap with an arrow of a special color and a tennis ball of the special color.
7. The intelligent man-machine interaction system for the tennis stadium for the blind as claimed in claim 1, wherein the system regulation and control method comprises the following steps:
A. two tennis players for the blind wear sports coats with different colors respectively, wear tennis caps with arrows with special colors, wear wireless earplug type sports earphones and locate on a tennis court, and use tennis with special color to carry out sports;
B. after the movement starts, cameras at different positions start to acquire image information and are processed by an STM32 single chip microcomputer to obtain the position information of the current blind athletes and the movement information of the tennis ball, and the movement track of the tennis ball is predicted;
C. then according to the position information of the blind athletes, the blind athletes are prompted to arrive at a touchdown area through a wireless earphone, and after the blind athletes arrive, according to the motion track of the current tennis ball, a prerecorded monophonic 'drip-drip' prompt sound file is extracted by an STM32 single chip microcomputer, and fast Fourier transform is carried out on the prerecorded monophonic 'drip-drip' prompt sound file;
D. then, according to the predicted motion track of the tennis ball and the current position of the blind athlete, the azimuth angle, the elevation angle and the distance of the virtual sound source relative to the blind athlete are solved, and the data are substituted into a head transfer function (HRTF) and are subjected to fast Fourier transform;
E. multiplying the two signals, performing fast Fourier inverse transformation, and converting the single-channel prompt sound into a virtual stereo sound;
F. and generating virtual stereo sound to be sent to the wireless earphone to prompt the motion state of the tennis ball of the blind athletes.
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| CN113476815A (en) * | 2021-05-17 | 2021-10-08 | 张昌昊 | Intelligent sports auxiliary training method and system based on E-ink |
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