CN107670258A - A kind of table tennis based on positioning is played a game service identifying system and method - Google Patents
A kind of table tennis based on positioning is played a game service identifying system and method Download PDFInfo
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- CN107670258A CN107670258A CN201711071919.XA CN201711071919A CN107670258A CN 107670258 A CN107670258 A CN 107670258A CN 201711071919 A CN201711071919 A CN 201711071919A CN 107670258 A CN107670258 A CN 107670258A
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- table tennis
- racket
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- game
- positioning
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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
- A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
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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
- A63B67/00—Sporting games or accessories therefor, not provided for in groups A63B1/00 - A63B65/00
- A63B67/04—Table games physically beneficial for the human body, modelled on outdoor sports, e.g. table 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
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/16—Table tennis
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- User Interface Of Digital Computer (AREA)
Abstract
Played a game service identifying system and method the invention discloses a kind of table tennis based on positioning.Its system includes obtaining pressure sensing data and judges whether racket impacts table tennis module, read table tennis position coordinate value module, judge whether racket impact table tennis is service module.Disposed in table-tennis system and obtain table tennis position data for the Internet of Things screen component (such as signal intensity positioning component) of table tennis positioning, the pressure sensor of racket face administration obtains pressure sensing data.Racket impact table tennis be divided into service and return of serve, do not consider table tennis play a game outside other batting situations.Toss is needed before wherein serving a ball, the movement velocity of table tennis is low, and table tennis speed is fast before returning serve, and server judges whether racket impact table tennis is service accordingly.The present invention solves the problems, such as that the table tennis system based on Internet of Things can not simply and effectively identify that table tennis is played a game service.
Description
Technical field
The invention belongs to smart table tennis Motion Technology field, played a game hair more particularly to a kind of table tennis based on positioning
Ball identifying system and method.
Background technology
The existing table tennis system based on Internet of Things mainly utilizes table tennis video or graphical analysis identification pair
Office's service, its shortcoming are computation complexity height, poor in timeliness.It is proposed that a kind of table tennis based on positioning plays a game with serving a ball for this to identify
System and method.
The content of the invention
The technical problems to be solved by the invention are that the table tennis system based on Internet of Things can not simply and effectively be known
Other table tennis play a game service the problem of, propose that a kind of table tennis based on positioning is played a game service identifying system and method.
The present invention applies table tennis location technology and pressure sensor, and wherein table tennis location technology refers to by existing
Internet of things device and localization method calculate the technology of table tennis real time position in motion process；Pressure sensor is by object pressure
Deformed upon after power so as to produce pressure sensing data.As shown in figure 1, the table tennis that is used for disposed in table-tennis system positions
Internet of Things screen component (such as signal intensity positioning component) obtain table tennis position data, racket face administration pressure sensor obtain
Pressure power sensing data, table tennis position data and pressure sensing data are sent to server.Racket impact table tennis in the present invention
Pang ball be divided into service and return of serve, do not consider table tennis play a game outside other batting situations.
The three-dimensional coordinate system of table tennis system is established in advance, and origin is ping-pong table center, x-axis and y-axis
Horizontal plane is formed, z-axis is upward perpendicular to desktop.The induction region for the pressure sensor that racket face is uniformly disposed covers whole racket
Face.Sampling time interval T is set, and its value is less than middle racket of playing a game and impacts the average time interval of table tennis twice (according to history
Data statistics obtains).The threshold X for setting racket to bat；The unit interval displacement threshold value of table tennis when judging racket service is set
L。
Table tennis positioner is disposed, calculate table tennis using existing table tennis localization method adopts each
The position coordinate value at sample moment.
The table tennis based on positioning of the present invention is played a game service identifying system, including is obtained pressure sensing data and judged ball
Whether bat impacts table tennis module, reads table tennis position coordinate value module, judges whether racket impact table tennis is service mould
Block.
Obtain pressure sensing data and judge whether racket impacts table tennis module：It is deployed in the pressure sensor in racket face
Pressure sensing data are obtained according to the sampling time interval T set in advance, are then forwarded to server；Server obtains same adopt
The pressure sensing data at sample moment, when having and only a pressure sensing data u meets u>During X, then this sampling instant ball is judged
Slap is played table tennis, into reading table tennis position coordinate value module；Otherwise acquisition pressure sensing data are returned and judge racket
Whether table tennis module is impacted.
Read table tennis position coordinate value module：Table tennis is read in the position coordinate value of this sampling instant, is designated as (xu,
yu,zu), (xu,yu,zu) it is the position coordinate value that racket impacts table tennis；The table tennis ball position for reading previous sampling instant is sat
Scale value, it is designated as (xv,yv,zv)。
Judge whether racket impact table tennis is service module：Racket impact table tennis is divided into service and return of serve (does not consider
Table tennis play a game outside other batting situations), wherein service before need toss, the movement velocity of table tennis is low, and return serve before
Table tennis speed is fast, judges whether now racket impact table tennis is service accordingly.Batting previous moment is calculated to batting
The displacement of table tennis between momentIf m<L, wherein L are to set in advance
That puts judges the unit interval displacement threshold value of table tennis during racket service, then judges that this sampling instant racket impact table tennis is hair
Ball, otherwise judge that this sampling instant racket impact table tennis is not service；Return and obtain pressure sensing data and judge that racket is
No impact table tennis module.
Table tennis based on positioning play a game service identifying system system block diagram it is as shown in Figure 2.
The table tennis based on positioning of the present invention plays a game service recognition methods according to the following steps：
Step 1, establish three-dimensional coordinate system and arrange parameter.
The three-dimensional coordinate system of table tennis system is established, origin is ping-pong table center, x-axis and y-axis composition
Horizontal plane, z-axis are upward perpendicular to desktop.The induction region for the pressure sensor that racket face is uniformly disposed covers whole racket face.
Sampling time interval T is set, and its value is less than middle racket of playing a game and impacts the average time interval of table tennis twice (according to historical data
Statistics obtains).The threshold X for setting racket to bat；The unit interval displacement threshold value L of table tennis when judging racket service is set.
Step 2, calculate table tennis position coordinate value.
Using existing table tennis location technology and device, position coordinates of the table tennis in each sampling instant is calculated
Value.
Step 3, obtain pressure sensing data and judge whether racket impacts table tennis.
The pressure sensor for being deployed in racket face obtains pressure sensing data according to sampling time interval T, is then forwarded to
Server；Server obtains the pressure sensing data of same sampling instant, when having and only a pressure sensing data u meets u>
During X, then judge that this sampling instant racket impacts table tennis, into step 4；Otherwise return to step 2.
Step 4, judge whether racket impact table tennis is service.
Position coordinate value (the x for table tennis this sampling instant transferredu,yu,zu) and a upper sampling instant
Table tennis position coordinate value (xv,yv,zv), calculate displacement of the batting previous moment to table tennis between the batting momentIf m<L, then judge that this sampling instant racket impact table tennis is
Service, otherwise judge that this sampling instant racket impact table tennis is not service；Return to step 2.
Table tennis based on positioning play a game service recognition methods flow chart, as shown in Figure 3.
The system and method for the present invention this have the advantage that：
(1) table tennis location technology and pressure sensor are applied, in can simply and effectively judging that table tennis is played a game
Table tennis ball position and racket batting node.
(2) played a game the feature of middle service according to table tennis, simply and effectively identify table tennis play a game in service.
Brief description of the drawings
Fig. 1 is the structural representation of the table tennis system based on signal intensity location technology of the present invention；
Fig. 2 be the present invention the table tennis based on positioning play a game service identifying system block diagram；
Fig. 3 be the present invention the table tennis based on positioning play a game service recognition methods flow chart；
Fig. 4 is the three-dimensional coordinate system schematic diagram of the embodiment of the present invention；
Embodiment
The preferred embodiment of the present invention is elaborated below.
The present invention applies table tennis location technology and pressure sensor, and wherein table tennis location technology refers to by existing
Internet of things device and localization method calculate the technology of table tennis real time position in motion process；Pressure sensor is by object pressure
Deformed upon after power so as to produce pressure sensing data.As shown in figure 1, disposed in table-tennis system for table tennis positioning
Internet of Things screen component (such as signal intensity positioning component) obtains table tennis position data, and the pressure sensor of racket face administration obtains
Pressure sensing data.Racket impact table tennis is divided into two kinds of situations of service and return of serve in the present invention, does not consider that table tennis plays a game it
Other outer batting situations.
The three-dimensional coordinate system of table tennis system is established in advance, and origin is ping-pong table center, x-axis and y-axis
Horizontal plane is formed, z-axis is upward perpendicular to desktop.The induction region for the pressure sensor that racket face is uniformly disposed covers whole racket
Face.Sampling time interval T is set, and its value is less than middle racket of playing a game and impacts the average time interval of table tennis twice (according to history
Data statistics obtains).The threshold X for setting racket to bat；The unit interval displacement threshold value of table tennis when judging racket service is set
L.In the present embodiment, the origin for establishing three-dimensional coordinate system is ping-pong table center, and ping-pong table center refers to rattle
The intersection point of net central shaft and ping-pong table, x-axis are hung down parallel to the narrow side of ping-pong table, y-axis parallel to ping-pong table long side, z-axis
It is directly upward in desktop, as shown in Figure 4.12 piezoelectric film sensors are uniformly disposed in racket face so that pressure sensitive region is covered
Cover whole racket face.Sampling time interval T=1 milliseconds are set；Threshold X=5 millivolt (mV) for setting racket to bat；Set and judge
The unit interval displacement threshold value L=0.1 rice of table tennis when racket is served a ball.
Table tennis positioner is disposed, calculate table tennis using existing table tennis localization method adopts each
The position coordinate value at sample moment.In the present embodiment, table tennis is calculated using the table tennis ball positioning method positioned based on signal intensity
Position coordinates, on ping-pong table dispose three signal receiving devices, sender unit, each signal are carried on table tennis
Reception device receives the wireless signal that table tennis is sent, and obtains signal intensity, is then forwarded to server, server is according to signal
The position of intensity and signal receiving device calculates position coordinate value of the table tennis in each sampling instant.
The table tennis based on positioning of the present invention is played a game service identifying system, including is obtained pressure sensing data and judged ball
Whether bat impacts table tennis module, reads table tennis position coordinate value module, judges whether racket impact table tennis is service mould
Block.
Obtain pressure sensing data and judge whether racket impacts table tennis module：It is deployed in the pressure sensor in racket face
Pressure sensing data are obtained according to the sampling time interval T set in advance, are then forwarded to server；Server obtains same adopt
The pressure sensing data at sample moment, when having and only a pressure sensing data u meets u>During X, then this sampling instant ball is judged
Slap is played table tennis, into reading table tennis position coordinate value module；Otherwise acquisition pressure sensing data are returned and judge racket
Whether table tennis module is impacted.In the present embodiment, 12 piezoelectric film sensors of racket face administration are according to sampling time interval T
Voltage data is obtained, is then forwarded to server, 12 voltage data value x=of certain sampling instant that server obtains (1,0,
0,1.2,0.8,1,0,0,7,2,1,1.5), have in matrix x and an only voltage data 7mV>5mV, then when judging this sampling
Racket impact table tennis is carved, into reading table tennis position coordinate value module.
Read table tennis position coordinate value module：Table tennis is read in the position coordinate value of this sampling instant, is designated as (xu,
yu,zu), (xu,yu,zu) it is the position coordinate value that racket impacts table tennis；The table tennis ball position for reading previous sampling instant is sat
Scale value, it is designated as (xv,yv,zv).In the present embodiment, read the position coordinate value of table tennis this sampling instant for (0.5, -1.5,
0.3), as racket impacts the position coordinate value of table tennis；The table tennis position coordinate value for reading previous sampling instant is
(0.48,-1.5,0.32)。
Judge whether racket impact table tennis is service module：Racket impact table tennis is divided into two kinds of situations of service and return of serve
(do not consider table tennis play a game outside other batting situations), wherein service before need toss, the movement velocity of table tennis is low, and
Table tennis speed is fast before return of serve, judges whether now racket impact table tennis is service accordingly.Calculate batting previous moment
To the displacement of table tennis between the batting momentIf m<L, wherein L are
What is set in advance judges the unit interval displacement threshold value of table tennis during racket service, then judges this sampling instant racket impact table tennis
Ball is service, otherwise judges that this sampling instant racket impact table tennis is not service；Return and obtain pressure sensing data and judgement
Whether racket impacts table tennis module.In the present embodiment, the previous sampling instant of batting is calculated to table tennis between the batting moment
Displacementm<L=0.1 rice, judge this sampling instant ball
It is service of playing a game that slap, which is played table tennis,.Return and obtain pressure sensing data and judge whether racket impacts table tennis module.
The table tennis based on positioning of the present invention plays a game service recognition methods according to the following steps：
Step 1, establish three-dimensional coordinate system and arrange parameter.
The three-dimensional coordinate system of table tennis system is established, origin is ping-pong table center, x-axis and y-axis composition
Horizontal plane, z-axis are upward perpendicular to desktop.The induction region for the pressure sensor that racket face is uniformly disposed covers whole racket face.
Sampling time interval T is set, and its value is less than middle racket of playing a game and impacts the average time interval of table tennis twice (according to historical data
Statistics obtains).The threshold X for setting racket to bat；The unit interval displacement threshold value L of table tennis when judging racket service is set.This
In embodiment, the origin for establishing three-dimensional coordinate system is ping-pong table center, and ping-pong table center refers to table tennis net
The intersection point of central shaft and ping-pong table, x-axis parallel to the narrow side of ping-pong table, y-axis parallel to ping-pong table long side, z-axis perpendicular to
Desktop is upward, as shown in Figure 4.12 piezoelectric film sensors are uniformly disposed in racket face so that pressure sensitive region overlay is whole
Individual racket face.Sampling time interval T=1 milliseconds are set；Threshold X=5 millivolt (mV) for setting racket to bat；Setting judges racket
The unit interval displacement threshold value L=0.1 rice of table tennis during service.
Step 2, calculate table tennis position coordinate value.
Using existing table tennis location technology and device, position coordinates of the table tennis in each sampling instant is calculated
Value.In the present embodiment, the position coordinates of table tennis is calculated using the table tennis ball positioning method positioned based on signal intensity, is being rattled
Three signal receiving devices are disposed on ball table, sender unit is carried on table tennis, each signal receiving device receives table tennis
The wireless signal that ball is sent, signal intensity is obtained, be then forwarded to server, server receives according to signal intensity and signal
The position of device calculates position coordinate value of the table tennis in each sampling instant.
Step 3, obtain pressure sensing data and judge whether racket impacts table tennis.
The pressure sensor for being deployed in racket face obtains pressure sensing data according to sampling time interval T, is then forwarded to
Server；Server obtains the pressure sensing data of same sampling instant, when having and only a pressure sensing data u meets u>
During X, then judge that this sampling instant racket impacts table tennis, into step 4；Otherwise return to step 2.In the present embodiment, racket face
12 piezoelectric film sensors of deployment obtain voltage data according to sampling time interval T, are then forwarded to server, server
12 voltage data value x=(1,0,0,1.2,0.8,1,0,0,7,2,1,1.5) of certain sampling instant obtained, have in matrix x
An and only voltage data 7mV>5mV, then judge that this sampling instant racket impacts table tennis, into step 4.
Step 4, judge whether racket impact table tennis is service.
Position coordinate value (the x for table tennis this sampling instant transferredu,yu,zu) and a upper sampling instant
Table tennis position coordinate value (xv,yv,zv), calculate displacement of the batting previous moment to table tennis between the batting momentIf m<L, then judge that this sampling instant racket impacts table tennis
It is service, otherwise judges that this sampling instant racket impact table tennis is not service；Return to step 2.In the present embodiment, this
The table tennis position coordinate value of sampling instant is (0.5, -1.5,0.3), and the table tennis position coordinate value of previous sampling instant is
(0.48, -1.5,0.32), calculate displacement of the previous sampling instant of batting to table tennis between the batting momentm<L=0.1 rice, judge that this sampling instant racket is hit
It is service of playing a game to play table tennis.Return to step 2.
Certainly, those of ordinary skill in the art is it should be appreciated that above example is intended merely to illustrate this hair
Bright, and limitation of the invention is not intended as, as long as within the scope of the invention, change, modification to above example are all
Protection scope of the present invention will be fallen into.
Claims (10)
- The service identifying system 1. a kind of table tennis based on positioning is played a game, it is characterised in that including obtaining pressure sensing data and sentencing Whether interception is clapped impacts table tennis module, reads table tennis position coordinate value module, judges whether racket impact table tennis is hair Ball module.
- The service identifying system 2. the table tennis according to claim 1 based on positioning is played a game, it obtains pressure sensing data And judge whether racket impacts table tennis module and be characterised by：The pressure sensor in racket face is deployed according to setting in advance Sampling time interval T obtains pressure sensing data, is then forwarded to server；The pressure that server obtains same sampling instant passes Data are felt, when having and only a pressure sensing data u meets u>During X, wherein X is the threshold for judging racket and batting set in advance Value, then judge that this sampling instant racket impacts table tennis, into reading table tennis position coordinate value module；Otherwise return and obtain pressure Power sensing data and judge whether racket impacts table tennis module.
- The service identifying system 3. the table tennis according to claim 1 based on positioning is played a game, it reads table tennis ball position and sat Scale value module is characterised by：Table tennis is read in the position coordinate value of this sampling instant, is designated as (xu,yu,zu), (xu,yu,zu) The as position coordinate value of racket impact table tennis；The table tennis position coordinate value of previous sampling instant is read, is designated as (xv,yv, zv)。
- The service identifying system 4. the table tennis according to claim 1 based on positioning is played a game, it judges racket impact table tennis Whether ball is that service module is characterised by：Calculate displacement of the batting previous moment to table tennis between the batting momentIf m<Table tennis when L, wherein L are the judgement racket services set in advance The unit interval displacement threshold value of pang ball, then judge that this sampling instant racket impact table tennis is service, when otherwise judging this sampling It is not service to carve racket impact table tennis；Return and obtain pressure sensing data and judge whether racket impacts table tennis module.
- The service recognition methods 5. a kind of table tennis based on positioning is played a game, it is characterised in that：Step 1, establish three-dimensional coordinate system and arrange parameter；Step 2, calculate table tennis position coordinate value；Step 3, obtain pressure sensing data and judge whether racket impacts table tennis；Step 4, judge whether racket impact table tennis is service.
- 6. the table tennis according to claim 5 based on positioning is played a game, service recognition methods, its step 1 are characterised by： Three-dimensional coordinate system is established, origin is ping-pong table center, and x-axis and y-axis composition horizontal plane, z-axis are upward perpendicular to desktop； The induction region of the pressure sensor of racket face administration covers whole racket face；Sampling time interval T is set；Setting judges racket The threshold X of batting；The unit interval displacement threshold value L of table tennis when judging racket service is set.
- 7. the table tennis according to claim 5 based on positioning is played a game, service recognition methods, its step 2 are characterised by： Using table tennis location technology and device, position coordinate value of the table tennis in each sampling instant is calculated.
- 8. the table tennis according to claim 5 based on positioning is played a game, service recognition methods, its step 3 are characterised by： The pressure sensor for being deployed in racket face obtains pressure sensing data according to sampling time interval T, is then forwarded to server；Clothes Device of being engaged in obtains the pressure sensing data of same sampling instant, when having and only a pressure sensing data u meets u>During X, then sentence Fixed this sampling instant racket impact table tennis, into step 4；Otherwise return to step 2.
- Service recognition methods, the feature of its step 4 9. table tennis according to claim 5 based on positioning is played a game It is：Position coordinate value (the x for table tennis this sampling instant transferredu,yu,zu) and a upper sampling instant table tennis Pang ball position coordinate value (xv,yv,zv), calculate displacement of the batting previous moment to table tennis between the batting momentIf m<L, then judge that this sampling instant racket impact table tennis is Service, otherwise judge that this sampling instant racket impact table tennis is not service；Return to step 2.
- The service recognition methods 10. the table tennis according to claim 6 based on positioning is played a game, it is characterised in that：During sampling Between be spaced T value and be less than middle racket of playing a game and impact the average time interval of table tennis twice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711071919.XA CN107670258B (en) | 2017-11-03 | 2017-11-03 | Table tennis match-up service identification system and method based on positioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711071919.XA CN107670258B (en) | 2017-11-03 | 2017-11-03 | Table tennis match-up service identification system and method based on positioning |
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| CN107670258A true CN107670258A (en) | 2018-02-09 |
| CN107670258B CN107670258B (en) | 2020-09-04 |
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| US5733210A (en) * | 1996-03-25 | 1998-03-31 | Yiu; Chih-Hao | Apparatus for scoring table tennis game |
| USRE43002E1 (en) * | 1999-10-08 | 2011-12-06 | Sportcraft, Ltd. | Net scoring system |
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| CN107670258B (en) | 2020-09-04 |
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