CN113750489A

CN113750489A - Basketball player's pass training system of throwing based on holographic technique

Info

Publication number: CN113750489A
Application number: CN202111175754.7A
Authority: CN
Inventors: 陈熙; 许绍哲; 黄可可; 王志朋; 朱荣
Original assignee: Wenzhou Medical University
Current assignee: Wenzhou Medical University
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2021-12-07
Anticipated expiration: 2041-10-09
Also published as: CN113750489B

Abstract

The invention discloses a basketball player pass training system based on holographic technology, which has the technical scheme that the system comprises a holographic display unit, a holographic projection unit, a holographic control unit and a holographic induction unit, wherein the holographic control unit is respectively and electrically connected with the holographic display unit, the holographic projection unit and the holographic induction unit; the holographic projection unit is used for projecting a holographic image to the holographic display unit; the holographic display unit is used for receiving the holographic image projected by the holographic projection unit; the holographic sensing unit is used for detecting the action posture of the training personnel and sending a control signal to the holographic control unit according to the action posture; the holographic control unit is used for receiving the control signal to control the holographic projection unit to project the corresponding holographic image according to the control signal, and the pass throwing training system can be used for training personnel to carry out pass throwing training in multiple modes, so that the manpower requirement is reduced, and the training interest is increased.

Description

Basketball player's pass training system of throwing based on holographic technique

Technical Field

The invention relates to the technical field of holography, in particular to a basketball player pass shooting training system based on the holography technology.

Background

The holographic projection technology (front-projected holographic display) belongs to a 3D technology, which originally refers to a technology for recording and reproducing a real three-dimensional image of an object by using the principle of interference. Then, with the guidance of science fiction movies and commercial propaganda, the concept of holographic projection is gradually extended to commercial activities such as stage performance, exhibition and exhibition. However, the holography which we know at ordinary times is not the holography projection in the strict sense, but a holography projection technology which uses the Pepper's ghost, edge blanking and other methods to realize the 3D effect.

Currently, in the basketball game, shooting and scoring are important skills, and passing is an important step for the success of the communication between teammates, so that the training of shooting and passing is particularly important in the basketball training. The existing training mode is mostly people to people cooperation training, the training mode is boring and tasteless, and not only needs multiple people to cooperate, but also needs a coach to observe and guide beside, so that the waste of human resources is excessive, and the training is inconvenient.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a basketball player pass-shooting training system based on holographic technology, which can be used for training personnel to carry out multi-mode pass-shooting training, so that the manpower requirement is reduced, and the training interest is increased.

In order to achieve the purpose, the invention provides the following technical scheme: a basketball player ball-throwing and passing training system based on holographic technology comprises a holographic display unit, a holographic projection unit, a holographic control unit and a holographic induction unit, wherein the holographic control unit is electrically connected with the holographic display unit, the holographic projection unit and the holographic induction unit respectively;

the holographic projection unit is used for projecting a holographic image to the holographic display unit;

the holographic display unit is used for receiving the holographic image projected by the holographic projection unit;

the holographic sensing unit is used for detecting the action posture of the training personnel and sending a control signal to the holographic control unit according to the action posture;

the holographic control unit is used for receiving the control signal and controlling the holographic projection unit to project the corresponding holographic image according to the control signal.

The invention is further configured to: the holographic sensing unit comprises a limb monitoring module, an identity input module and a central control module, wherein the limb monitoring module and the identity input module are respectively and electrically connected with the central control module, and the central control module is electrically connected with the holographic control unit;

the limb monitoring module is used for monitoring hand movements, foot movements and gravity center positions of the trainers;

the identity input module is used for inputting height information, leg length information and hand length information of a trainer;

the central control module is used for receiving hand movements, foot movements and gravity center positions of the trainees and judging the movement states of the trainees based on height information, leg length information and hand length information of the trainees.

The invention is further configured to: the limb monitoring module comprises a hand monitoring part, a foot monitoring part and a waist monitoring part, wherein the hand monitoring part comprises a left hand ring device and a right hand ring device which are sleeved at the wrist position;

the foot monitoring part comprises a left foot ring device and a right foot ring device which are sleeved at the ankle position;

the waist monitoring part comprises a waist bending device which is arranged on the body of a trainee.

The invention is further configured to: the left hand ring device and the right hand ring device respectively comprise a hand ring part, a finger ring part and a connecting part for connecting the finger ring part and the hand ring part, the hand ring parts are sleeved on the wrists of the trainers, and the hand ring parts are used for detecting the position heights of the hand rings;

the finger ring part is sleeved on the finger head part of the training personnel, and the connecting part is made of elastic materials and used for detecting the bending state of the palm.

The invention is further configured to: the waist monitoring part comprises a first monitoring component and a second monitoring component, the first monitoring component is arranged at the position of the lower hem of the garment, and the second monitoring component is arranged at the position of the neckline.

The invention is further configured to: waist monitoring portion still including crooked monitoring band, crooked monitoring band is connected with first monitoring component and second monitoring component respectively, crooked monitoring band is used for laminating with the vertebra.

The invention is further configured to: the left hand ring device and the right hand ring device respectively comprise a frequency monitor, the central control module comprises a counting module, a mode selection module and a data recording module, and the counting module is electrically connected with the frequency monitors and used for recording the dribbling times of training personnel;

the data recording module is respectively electrically connected with the left hand ring device, the right hand ring device, the left foot ring device, the right foot ring device and the waist bending device and is used for recording the arm position, the leg position and the gravity center condition of the training personnel;

the mode selection module is respectively and electrically connected with the counting module and the data recording module and is used for carrying out mode adjustment according to the standing posture state and the dribbling frequency of the training personnel.

The invention is further configured to: the mode selection module comprises a pitching selection submodule, a passing selection submodule and a difficulty selection submodule;

a plurality of pitching gestures are stored in the pitching selection submodule, and when the pitching selection submodule detects the posture and the action of a training person through the data recording module, the pitching gestures are determined;

a plurality of pass gestures are stored in the pass selection submodule, and when the pass selection submodule detects the posture action of a training person through the data recording module, the pass gesture is determined;

the difficulty selection submodule is used for adjusting pass difficulty and pitching difficulty, the training difficulty is increased when the difficulty selection submodule detects that a trainer bends to carry out low dribbling, and the training difficulty is reduced when the difficulty selection submodule detects that a vertical high dribbling is carried out.

The invention is further configured to: the system also comprises a scoring unit, wherein the scoring unit is used for acquiring frequency data of the frequency monitor, arm positions of the data recording module and projection data of the holographic projection unit, and scoring is carried out according to acceleration data, height data and accurate hitting data of the thrown ball.

The invention is further configured to: the device comprises a holographic display unit, a central control module and a holographic projection unit, wherein a ball collecting part is arranged on the holographic display unit, a ball collecting action is arranged in the central control module, when a trainer performs the ball collecting action, the central control module controls the holographic projection unit to project an image to the ball collecting part, the ball collecting part comprises a ball collecting cavity, a ball collecting plate used for sealing the ball collecting cavity and a driving device used for controlling the ball collecting plate to move, and the driving device is connected with the central control module.

In conclusion, the invention has the following beneficial effects: through holographic projection unit to holographic display element projection holographic image, training personnel throw ball, pass training according to the holographic image that appears to need not other people and just can carry out effective training, can train basketball player's the field of vision and pass according to holographic projection's characteristics, still its accuracy nature.

Then according to the motion gesture of holographic induction element monitoring training personnel, carry out mode selection and the degree of difficulty selection according to training personnel's motion gesture to need not to operate from extra port, make training personnel can be uninterrupted carry out basketball training in succession, not only can practice thrift unnecessary operating time, can maintain training personnel's dribbling feel moreover all the time.

Drawings

FIG. 1 is a schematic diagram of a basketball player pass training system using holographic technology;

FIG. 2 is a schematic diagram of a holographic sensing unit;

fig. 3 is a schematic diagram of the central control module.

Reference numerals: 1. a holographic display unit; 2. a holographic projection unit; 3. a holographic control unit; 4. a holographic sensing unit; 41. a limb monitoring module; 42. an identity input module; 43. a central control module; 44. a counting module; 45. a mode selection module; 451. a pitching selection submodule; 452. pass selection submodule; 453. a difficulty selection submodule; 46. a data recording module; 5. a hand monitoring section; 51. a hand ring portion; 52. a finger ring part; 53. a connecting portion; 54. a frequency monitor; 6. a foot monitoring section; 7. a waist monitoring section; 71. a first monitoring section; 72. a second monitoring section; 73. bending the monitoring band; 8. a scoring unit; 9. a ball collecting part.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1 to 3, in order to achieve the above object, the present invention provides the following technical solutions: a basketball player throwing pass training system based on holographic technology comprises a holographic display unit 1, a holographic projection unit 2, a holographic control unit 3 and a holographic sensing unit 4, wherein the holographic control unit 3 is electrically connected with the holographic display unit 1, the holographic projection unit 2 and the holographic sensing unit 4 respectively;

the holographic projection unit 2 is used for projecting a holographic image to the holographic display unit 1;

the holographic display unit 1 is used for receiving the holographic image projected by the holographic projection unit 2;

the holographic sensing unit 4 is used for detecting the action posture of the training person and sending a control signal to the holographic control unit 3 according to the action posture;

the holographic control unit 3 is used for receiving the control signal and controlling the holographic projection unit 2 to project the corresponding holographic image according to the control signal.

According to the design of the invention, the holographic projection unit 2 projects the holographic image to the holographic display unit 1, and training personnel can carry out shooting and passing training according to the generated holographic image, so that effective training can be carried out without other people, the vision and passing of basketball players can be trained according to the characteristics of holographic projection, and the accuracy is also achieved.

Then, the action posture of the training personnel is monitored according to the holographic sensing unit 4, and mode selection and difficulty selection are carried out according to the action posture of the training personnel, so that operation from an additional port is not needed, the training personnel can continuously and uninterruptedly carry out basketball training, unnecessary operation time can be saved, and the dribbling hand feeling of the training personnel can be maintained all the time.

The holographic sensing unit 4 comprises a limb monitoring module 41, an identity input module 42 and a central control module 43, wherein the limb monitoring module 41 and the identity input module 42 are respectively and electrically connected with the central control module 43, and the central control module 43 is electrically connected with the holographic control unit 3;

the limb monitoring module 41 is used for monitoring the hand action, the foot action and the gravity center position of the trainee;

the identity input module 42 is used for inputting height information, leg length information and hand length information of the trainee;

the central control module 43 is used for receiving the hand movements, the foot movements and the gravity center position of the trainee and judging the movement state of the trainee based on the height information, the leg length information and the hand length information of the trainee.

In the design, firstly, the trainer inputs own identity information and various numerical information, especially height information, leg length information and hand length information through the identity input module 42, and the hand action, the foot action and the gravity center position of the trainer can be accurately monitored by matching the data information with the upper limb monitoring module 41. Furthermore, training data storage is also enabled via identity input module 42.

The limb monitoring module 41 comprises a hand monitoring part 5, a foot monitoring part 6 and a waist monitoring part 7, wherein the hand monitoring part 5 comprises a left hand ring device and a right hand ring device which are sleeved at the wrist position;

the left hand ring device and the right hand ring device respectively comprise a hand ring part 51, a finger ring part 52 and a connecting part 53 for connecting the finger ring part 52 and the hand ring part 51, the hand ring part 51 is sleeved at the wrist of the trainer, and the hand ring part 51 is used for detecting the height of the hand ring position;

the ring part 52 is sleeved on the head of the finger of the trainee, and the connecting part 53 is made of elastic material and used for detecting the bending state of the palm.

The hand monitoring part 5 is designed to cover the wrist part 51 of the training person, and the finger ring part 52 of the training person on the head of the finger (which can be covered on the middle finger or the index finger according to the comfort of the training person), preferably on the finger part;

and this connecting portion 53 can be elastic rope, and the middle part of elastic rope is provided with the pulling force index ware that is used for detecting the pulling force index, and the finger is crooked when training personnel dribble, bowling and pass, can drag the elastic rope this moment for the pulling force index ware changes, detects the atress condition at that time, thereby judges training personnel's the crooked state of finger.

The connecting portion 53 may further include a device for connecting the rope and winding the rope (the device is an existing device and is not described herein), and a length detecting device disposed in the rope winding device for detecting the length of the rope, so as to determine the finger bending state of the trainee by detecting the length of the rope.

In conclusion, through the input hand length information and the hand position information and the palm bending information monitored by the hand monitoring part 5, the hand actions of the training personnel can be accurately judged, and the hand actions can be effectively identified as pass gestures or throw gestures.

The foot monitoring part 6 comprises a left foot ring device and a right foot ring device which are sleeved at the ankle position; the design of the step monitoring part is used for monitoring the step action of the training personnel and whether the training personnel jump.

The lumbar monitoring portion 7 includes a lumbar bending device mounted to the body of the trainee.

The waist portion monitoring unit 7 includes a first monitoring member 71 and a second monitoring member 72, the first monitoring member 71 being attached to a lower hem position of the garment, and the second monitoring member 72 being attached to a neckline position.

The waist monitoring part 7 further comprises a bending monitoring belt 73, the bending monitoring belt 73 is respectively connected with the first monitoring part 71 and the second monitoring part 72, and the bending monitoring belt 73 is used for being attached to the spine.

The waist monitoring part 7 is arranged at the back position of the trainee, is clamped at the lower hem position of the clothes of the trainee through the first monitoring part 71, is clamped at the neckline position of the clothes of the trainee through the second monitoring part 72, and is used for attaching the bending monitoring belt 73 to the spine (the clothes of the trainee are preferably tight training clothes), the bending monitoring belt 73 adopts the elastic rope structure and is used for monitoring the bending degree of the upper body of the trainee, and the first monitoring part 71 and the second monitoring part 72 both have a positioning function, for example, when the trainee stands, the positioning value x is 0, y is 0, z is 10, and the stress of the bending monitoring belt 73 is 0;

when the trainee bends forward, the positioning value is x is 5, y is 0, z is 7, and the bending monitoring belt 73 is stressed by 6;

when the trainee bends forward and leans, the positioning value is x is 3, y is 2, z is 7, and the bending monitoring belt 73 is stressed by 4;

when the trainee leans back, the positioning value x is-2, y is 0, z is 8, and the force applied to the bending monitoring belt 73 is 2;

in summary, the waist monitoring unit 7 can monitor the action state of the trainee in real time.

The left hand ring device and the right hand ring device both comprise a frequency monitor 54, the central control module 43 comprises a counting module 44, a mode selection module 45 and a data recording module 46, and the counting module 44 is electrically connected with the frequency monitor 54 and used for recording the dribbling times of the trainers;

the data recording module 46 is electrically connected with the left hand ring device, the right hand ring device, the left foot ring device, the right foot ring device and the waist bending device respectively and is used for recording the arm position, the leg position and the gravity center condition of the trainee;

the mode selection module 45 is electrically connected with the counting module 44 and the data recording module 46 respectively, and is used for carrying out mode adjustment according to the standing posture state and the dribbling frequency of the training personnel.

The mode selection module 45 comprises a pitching selection sub-module 451, a pass selection sub-module 452 and a difficulty selection sub-module 453;

a plurality of pitching gestures are stored in the pitching selection submodule 451, and when the pitching selection submodule 451 detects the posture and the action of the training personnel through the data recording module 46, the pitching gestures are determined;

a plurality of pass gestures are stored in the pass selection submodule 452, and when the pass selection submodule 452 detects the posture action of the training person through the data recording module 46, the pass gesture is determined; difficulty selection submodule 453 is used to adjust the pass difficulty and the pitch difficulty.

This frequency monitor 54's design can be used for monitoring training personnel's speed of clapping, and it can accurately catch training personnel's health posture and dribbling state to cooperate upper limbs body monitoring module 41 again to select submodule 453 to carry out the mode switch through the dribbling mode that has characteristics of difference according to the degree of difficulty, for example training degree of difficulty increase when degree of difficulty selection submodule 453 detects the crooked low dribbling of training personnel, training degree of difficulty reduces when degree of difficulty selection submodule 453 detects the high dribbling of standing.

When the high dribbling is dribbling, the two legs are upright, the upper body is slightly forward inclined, and the eyes are level. The elbow joint is used as the axis, the forearm is bent and stretched naturally, the wrist and the fingers press the back and upper part of the racket gently and powerfully, the ball is touched by the finger root and the finger abdomen, and the index finger moves forward.

When the low dribbling ball is dribbling, the two legs are bent deeply, the gravity center is lowered, the upper body is inclined forward, the bent wrists press the rear upper part of the ball with fingers and finger roots for a short time, the falling point of the ball is positioned on the side surface of the body, and the rebound height is kept below the knee joint, so that the ball can be controlled better and the ball can be better released from defense.

In conclusion, the design can be used for difficulty switching through in-situ dribbling, mode selection is carried out through a pitching gesture or a passing gesture, selection of a dribbling mode can be carried out through footsteps, unnecessary control ports are reduced, training personnel can enter a training state in a whole body and mind mode, basketball handfeel is held for a long time, and selection of the mode is carried out without interruption.

The scoring unit 8 is further included, and the scoring unit 8 is used for acquiring frequency data of the frequency monitor 54, arm positions of the data recording module 46 and projection data of the holographic projection unit 2, and performing scoring operation according to acceleration data, height data and accurate hitting data of the tossing ball.

All need to be told fast and accurate when passing and throwing the ball, can know the acceleration when throwing the ball (be for play hand speed) through this frequency monitor 54, through the play ball height when hand monitoring portion 5 acquires the ball of throwing, whether judge the ball according to the fixed point hitting area that holographic projection unit 2 throws again, whether strike the accuracy, the unit 8 of scoring is according to various data, operation of scoring to the training process.

The holographic display unit 1 is provided with a ball receiving part 9, the central control module 43 is internally provided with a ball receiving action, when a trainer performs the ball receiving action, the central control module 43 controls the holographic projection unit 2 to project an image to the ball receiving part 9, the ball receiving part 9 comprises a ball receiving cavity, a ball receiving plate used for blocking the ball receiving cavity and a driving device used for controlling the movement of the ball receiving plate, and the driving device is connected with the central control module 43.

When the training person takes the ball collecting action, the next or next holographic projections are projected to the ball collecting part 9, and the driving device of the ball collecting part 9 collects the ball collecting plate down, so that the basketball is thrown into the ball collecting part 9.

In addition, the training item generation method based on the technology is obtained by firstly carrying out various single training, judging the completion degree and the qualification degree in each single training through the hand monitoring part, the foot monitoring part, the waist monitoring part and the scoring unit, determining a first training action by the central control module when carrying out comprehensive training, and then carrying out difficulty adjustment, wherein the central control module carries out combined training according to the difficulty condition selected by a training person and the switching difficulty between the action and the action to generate the training item.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A basketball player's pass training system based on holographic technique, characterized by: the holographic control system comprises a holographic display unit (1), a holographic projection unit (2), a holographic control unit (3) and a holographic sensing unit (4), wherein the holographic control unit (3) is electrically connected with the holographic display unit (1), the holographic projection unit (2) and the holographic sensing unit (4) respectively;

the holographic projection unit (2) is used for projecting a holographic image to the holographic display unit (1);

the holographic display unit (1) is used for receiving the holographic image projected by the holographic projection unit (2);

the holographic sensing unit (4) is used for detecting the action posture of the training personnel and sending a control signal to the holographic control unit (3) according to the action posture;

the holographic control unit (3) is used for receiving the control signal and controlling the holographic projection unit (2) to project the corresponding holographic image according to the control signal.

2. The holographic-based basketball player pass training system as claimed in claim 1, wherein said holographic-based basketball player comprises: the holographic sensing unit (4) comprises a limb monitoring module (41), an identity input module (42) and a central control module (43), wherein the limb monitoring module (41) and the identity input module (42) are respectively and electrically connected with the central control module (43), and the central control module (43) is electrically connected with the holographic control unit (3);

the limb monitoring module (41) is used for monitoring hand movements, foot movements and the gravity center position of a trainer;

the identity input module (42) is used for inputting height information, leg length information and hand length information of a trainer;

the central control module (43) is used for receiving the hand movements, the foot movements and the gravity center position of the trainee and judging the movement state of the trainee based on the height information, the leg length information and the hand length information of the trainee.

3. The holographic-based basketball player pass training system as claimed in claim 2, wherein said holographic-based basketball player comprises: the limb monitoring module (41) comprises a hand monitoring part (5), a foot monitoring part (6) and a waist monitoring part (7), and the hand monitoring part (5) comprises a left hand ring device and a right hand ring device which are sleeved at the wrist position;

the foot monitoring part (6) comprises a left foot ring device and a right foot ring device which are sleeved at the ankle position;

the waist monitoring part (7) comprises a waist bending device which is arranged on the body of the trainee.

4. The holographic-based basketball player pass training system as claimed in claim 3, wherein said holographic-based basketball player comprises: the left hand ring device and the right hand ring device respectively comprise a hand ring part (51), a finger ring part (52) and a connecting part (53) for connecting the finger ring part (52) and the hand ring part (51), the hand ring part (51) is sleeved on the wrist of the trainer, and the hand ring part (51) is used for detecting the position height of the hand ring;

the finger ring part (52) is sleeved on the finger head part of a trainer, and the connecting part (53) is made of elastic materials and used for detecting the bending state of a palm.

5. The holographic-based basketball player pass training system as claimed in claim 3, wherein said holographic-based basketball player comprises: the waist monitoring part (7) comprises a first monitoring component (71) and a second monitoring component (72), the first monitoring component (71) is arranged at the position of the lower hem of the garment, and the second monitoring component (72) is arranged at the position of the neckline.

6. The holographic-based basketball player pass training system as claimed in claim 5, wherein said holographic-based basketball player comprises: waist monitoring portion (7) still including crooked monitoring band (73), crooked monitoring band (73) are connected with first monitoring component (71) and second monitoring component (72) respectively, crooked monitoring band (73) are used for laminating with the vertebra.

7. The holographic-based basketball player pass training system as claimed in claim 3, wherein said holographic-based basketball player comprises: the left hand ring device and the right hand ring device both comprise a frequency monitor (54), the central control module (43) comprises a counting module (44), a mode selection module (45) and a data recording module (46), and the counting module (44) is electrically connected with the frequency monitor (54) and used for recording the dribbling times of training personnel;

the data recording module (46) is respectively and electrically connected with the left hand ring device, the right hand ring device, the left foot ring device, the right foot ring device and the waist bending device and is used for recording the arm position, the leg position and the gravity center condition of the training personnel;

the mode selection module (45) is respectively and electrically connected with the counting module (44) and the data recording module (46) and is used for carrying out mode adjustment according to the standing posture state and the dribbling frequency of the training personnel.

8. The holographic-based basketball player pass training system as claimed in claim 7, wherein said holographic-based basketball player comprises: the mode selection module (45) comprises a pitching selection sub-module (451), a pass selection sub-module (452) and a difficulty selection sub-module (453);

a plurality of pitching gestures are stored in the pitching selection submodule (451), and when the pitching selection submodule (451) detects the posture and the action of a training person through the data recording module (46), the pitching gestures are determined;

a plurality of pass gestures are stored in the pass selection submodule (452), and when the pass selection submodule (452) detects the posture action of a training person through the data recording module (46), the pass gesture is determined;

the difficulty selection submodule (453) is used for adjusting pass difficulty and pitching difficulty, the training difficulty is increased when the difficulty selection submodule (453) detects that a trainer bends to carry a low dribble, and the training difficulty is reduced when the difficulty selection submodule (453) detects that a trainer stands to carry a high dribble.

9. The holographic-based basketball player pass training system as claimed in claim 7, wherein said holographic-based basketball player comprises: the device is characterized by further comprising a scoring unit (8), wherein the scoring unit (8) is used for acquiring frequency data of the frequency monitor (54), arm positions of the data recording module (46) and projection data of the holographic projection unit (2), and scoring is carried out according to acceleration data, height data and accurate hitting data of a ball.

10. The holographic-based basketball player pass training system as claimed in claim 2, wherein said holographic-based basketball player comprises: the device is characterized in that a ball receiving part (9) is arranged on the holographic display unit (1), a ball receiving action is arranged in the central control module (43), when a trainer makes the ball receiving action, the central control module (43) controls the holographic projection unit (2) to project an image to the ball receiving part (9), the ball receiving part (9) comprises a ball receiving cavity, a ball receiving plate used for sealing the ball receiving cavity and a driving device used for controlling the ball receiving plate to move, and the driving device is connected with the central control module (43).