CN107694073A - Racket judges whether that fair catch and ball move towards system and method after hitting table tennis - Google Patents
Racket judges whether that fair catch and ball move towards system and method after hitting table tennis Download PDFInfo
- Publication number
- CN107694073A CN107694073A CN201711072472.8A CN201711072472A CN107694073A CN 107694073 A CN107694073 A CN 107694073A CN 201711072472 A CN201711072472 A CN 201711072472A CN 107694073 A CN107694073 A CN 107694073A
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- table tennis
- racket
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Classifications
-
- 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
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
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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
- A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
- A63B59/40—Rackets or the like with flat striking surfaces for hitting a ball in the air, e.g. for table tennis
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/46—Measurement devices associated with golf clubs, bats, rackets or the like for measuring physical parameters relating to sporting activity, e.g. baseball bats with impact indicators or bracelets for measuring the golf swing
-
- 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
-
- 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
-
- 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
- A63B2220/50—Force related parameters
- A63B2220/56—Pressure
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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
- A63B2220/83—Special sensors, transducers or devices therefor characterised by the position of the sensor
- A63B2220/833—Sensors arranged on the exercise apparatus or sports implement
Abstract
Judge whether that fair catch and ball move towards system and method after hitting table tennis the invention discloses racket.Its system include read historical data and determine whether fair catch module, obtain ball table pressure sensing data and judge table tennis whether impact bead table module, obtain net pressure sensing data and judge table tennis whether hit net module, acquisition racket pressure sensing data and judge table tennis whether by racket shock module, judge whether table tennis lands module.Both sides come and go and received in table tennis is played a game, after table tennis is hit by racket, server determines whether fair catch according to the historical data before shock, and the trend of table tennis is identified according to the pressure sensing data that pressure sensor is sent on table tennis desktop, racket face and net face after shock.The present invention solve the problems, such as the existing table tennis system based on Internet of Things without judge play a game when racket hit table tennis whether fair catch and ball trend function.
Description
Technical field
The invention belongs to smart table tennis Motion Technology field, judges whether to close after hitting table tennis more particularly to racket
Method is received and ball moves towards system and method.
Background technology
Whether legal racket hits table tennis when the existing table tennis system based on Internet of Things is played a game without judgement
Receive and ball trend function.It is proposed that racket judges whether that fair catch and ball move towards system and side after hitting table tennis for this
Method.
The content of the invention
The technical problems to be solved by the invention are the existing table tennis systems based on Internet of Things without judgement pair
Office when racket hit table tennis whether fair catch and ball trend function, propose racket hit table tennis after judge whether it is legal
Receive and ball moves towards system and method.
Fair catch of the present invention refers to hitting from other side and fly by the way of table tennis rule is met in playing a game
The summary of the table tennis to come over.
Pressure sensor after object pressure by deforming upon so as to producing pressure sensing data.As shown in figure 1, rattling
Ball desktop, racket face and net face dispose pressure sensor and obtain pressure sensing data respectively, are then forwarded to server, service
Device obtains the pressure sensing data of same sampling instant and judges whether table tennis hits table, hits or hit net by racket.Rattling
Ball is played a game, and middle both sides are round to receive, and after table tennis is hit by racket, server determines whether according to the historical data before shock
Fair catch, known according to the pressure sensing data that pressure sensor is sent on table tennis desktop, racket face and net face after shock
The trend of other table tennis.It is the summary that net is hit to table tennis that table tennis of the present invention, which hits net,；It is of the present invention to hit
Bat is the summary hit to table tennis by racket；The table of the present invention that hits is the summary to table tennis impact bead table.The present invention
Described desktop refers to table tennis desktop；Wire side of the present invention refers to table tennis wire side；Face of the present invention refers to
Table tennis.
Table tennis both sides' numbering of playing a game is that A and B, then ball table and racket numbering are the numbering of its corresponding side of playing a game.In ball
Pressure sensor is disposed in desktop, net face and racket face respectively, and pressure sensitive region is covered each by whole desktop, wire side and bat
Face.Sampling time interval T is set, and its value is less than the average time interval that middle table tennis hits twice of playing a game (according to historical data
Statistics obtains)；Positive integer M and N are set；The threshold X for judging table tennis ball impact is set.State that variable i represents table tennis by racket
Hit, when table tennis is hit by racket, then i=1, otherwise i=0；Statement variable j represents that table tennis hits table, when table tennis is hit
Bat table when, then j=1, otherwise j=0；Statement variable m represents that table tennis hits net, and when table tennis hits net, then m=1, no
Then m=0.
The pressure sensor for being deployed in racket face, ball desktop and net face obtains pressure sensing according to sampling time interval T
Data, it is then forwarded to server；Server obtains the pressure sensing data of same sampling instant, according to racket, ball table and ball
The pressure sensing data of net calculate each sampling instant variable i, variable j and variable m value and record.
The racket of the present invention judges whether that fair catch and ball move towards system after hitting table tennis, including reads historical data
And determine whether fair catch module, obtain ball table pressure sensing data and judge table tennis whether impact bead table module,
Obtain the pressure sensing data of net and judge whether table tennis hits net module, the pressure sensing data for obtaining racket and judge table tennis
Pang ball whether by racket hit module, judge whether table tennis lands module.
Read historical data and determine whether fair catch module：It is the racket numbering for hitting table tennis to remember variable x；Read
Take the value that continuous N sampling instant variable i, variable j and variable m before the moment are hit by racket, variable i, variable j and variable m
(the 1st behavior corresponds to the value of variable i to 3 × M of order composition of the value according to sampling instant from back to front matrix H, and the 2nd behavior is corresponding
Variable j value, value of the 3rd behavior to dependent variable m), racket hits frequency n1The element number of variable i=1 as in matrix H,
Record the row number m that the last racket hits in matrix1, note variable x1For the last racket numbering for hitting table tennis；Hit table
Frequency n2Variable j=1 element number as in matrix H, record the last row number m for hitting table in matrix2, note variable x2For
The ball table numbering that the last time hits；Hit net frequency n3Variable m=1 element number as in matrix H.Meet n when simultaneously1=
n2=1, m1>m2、n3≤1、x1≠x、x2During=x, then it is fair catch to judge that this sampling instant racket hits table tennis, sets and becomes
Measure k=1, at the same enter the pressure sensing data for obtaining ball table and judge table tennis whether impact bead table module, acquisition net
Pressure sensing data and judge table tennis whether hit net module, obtain racket pressure sensing data and judge table tennis whether by
Racket hits module；Otherwise it is not fair catch to judge that this sampling instant racket hits table tennis.
Obtain ball table pressure sensing data and judge table tennis whether impact bead table module：It is deployed in the pressure of ball desktop
Sensor obtains the pressure sensing data hit by racket after the moment 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 are more than X, then judges
This sampling instant table tennis impact bead table, note variable y are the ball table numbering hit；If x ≠ y, rattled after judging fair catch
Ball falls on other side's desktop；If x=y, table tennis drops back into one's own side's desktop after judging fair catch.Otherwise judge that this sampling instant does not have
Have and table tennis impact bead table occurs.
Obtain the pressure sensing data of net and judge whether table tennis hits net module：It is deployed in the pressure sensing in net face
Device obtains the pressure sensing data hit by racket after the moment according to sampling time interval T, is then forwarded to server.Service
Device obtains the pressure sensing data of same sampling instant, and when having and only a pressure sensing data are more than X, then it is legal to judge
Table tennis hits net after receiving；Otherwise judge that this sampling instant does not occur table tennis and hits net.
Obtain the pressure sensing data of racket and judge whether table tennis by racket hits module：It is deployed in the pressure in racket face
Force snesor obtains the pressure sensing data hit by racket after the moment according to sampling time interval T, is then forwarded to service
Device.Server obtains the pressure sensing data of same sampling instant, when having and only a pressure sensing data are more than X, then
Judge that this sampling instant table tennis is hit by racket, note variable z is the racket numbering for hitting table tennis；It is legal to judge if x=z
Table tennis is hit by one's own side's racket again after receiving；Table tennis is hit by other side's racket after judging fair catch if x ≠ z.It is no
Then judge that this sampling instant table tennis is not hit by racket.
Judge whether table tennis lands module：When table tennis does not have impact bead table and without shock net and not by racket
During shock, then judge whether k is less than N.If k<N, then k=k+1 is made, while return to the pressure sensing data for obtaining ball table and judgement
Table tennis whether impact bead table module, obtain net pressure sensing data and judge table tennis whether hit net module and acquisition ball
The pressure sensing data of bat and judge whether table tennis by racket hits module；Otherwise table tennis directly falls after judging fair catch
Ground.
Racket judges whether fair catch after hitting table tennis and ball move towards system system block diagram it is as shown in Figure 2.Each mould
The logical order of block as shown in Fig. 2 wherein obtain the pressure sensing data of ball table and judge table tennis whether impact bead table module,
Obtain the pressure sensing data of net and judge whether table tennis hits net module and the pressure sensing data for obtaining racket and judgement
Whether table tennis hits module by racket.
The racket of the present invention judges whether that fair catch and ball move towards method according to the following steps after hitting table tennis：
Step 1, the numbering and correlated variables that racket and ball table are set.
Table tennis both sides' numbering of playing a game is that A and B, then ball table and racket numbering are the numbering of its corresponding side of playing a game.In ball
Pressure sensor is disposed in desktop, net face and racket face respectively, and pressure sensitive region is covered each by whole desktop, wire side and bat
Face.Sampling time interval T is set, and its value is less than the average time interval that middle table tennis hits twice of playing a game (according to historical data
Statistics obtains)；Positive integer M and N are set；The threshold X for judging table tennis ball impact is set.State that variable i represents table tennis by racket
Hit, when table tennis is hit by racket, then i=1, otherwise i=0；Statement variable j represents that table tennis hits table, when table tennis is hit
Bat table when, then j=1, otherwise j=0；Statement variable m represents that table tennis hits net, and when table tennis hits net, then m=1, no
Then m=0.
Step 2, record variable i, variable j and variable m value.
The pressure sensor for being deployed in racket face, ball desktop and net face obtains pressure sensing according to sampling time interval T
Data, it is then forwarded to server；Server obtains the pressure sensing data of same sampling instant, according to racket, ball table and ball
The pressure sensing data of net calculate each sampling instant variable i, variable j and variable m value and record；When variable i=1, then
Into step 3；Otherwise return to step 2.
Step 3, read historical data and determine whether fair catch.
It is the racket numbering for hitting table tennis to remember variable x；Read by continuous N sampling instant variable before the racket shock moment
I, variable j and variable m value, the value of variable i, variable j and variable m form 3 × M's according to the order of sampling instant from back to front
Matrix H (the 1st behavior corresponds to the value of variable i, and the 2nd behavior is to dependent variable j value, value of the 3rd behavior to dependent variable m), racket is hit
Hit frequency n1The element number of variable i=1 as in matrix H, record the row number m that the last racket hits in matrix1, note change
Measure x1For the last racket numbering for hitting table tennis；Hit table frequency n2Variable j=1 element number as in matrix H, note
The last row number m for hitting table in record matrix2, note variable x2The ball table numbering hit for the last time；Hit net frequency n3As square
Variable m=1 element number in battle array H.Meet n when simultaneously1=n2=1, m1>m2、n3≤1、x1≠x、x2During=x, then this is judged
It is fair catch that sampling instant racket, which hits table tennis, variable k=1 is set, into step 4；Otherwise this sampling instant ball is judged
It is not fair catch to clap shock table tennis, is terminated.
Step 4 at the same obtain the pressure sensing data of ball table, net and racket and judge table tennis whether impact bead table,
Net or racket.Perform step 4.1, step 4.2 and step 4.3 simultaneously.
Step 4.1, obtain ball table pressure sensing data and judge table tennis whether impact bead table.
The pressure sensor for being deployed in ball desktop obtains the pressure hit by racket after the moment according to sampling time interval T
Sensing data, it is then forwarded to server.Server obtains the pressure sensing data of same sampling instant, when having and only one
When pressure sensing data are more than X, then this sampling instant table tennis impact bead table is judged, note variable y is the ball table numbering hit；If
X ≠ y, then table tennis falls on other side's desktop after judging fair catch；If x=y, table tennis drops back into one's own side after judging fair catch
Desktop.Otherwise judge that table tennis impact bead table does not occur for this sampling instant.
Step 4.2, obtain net pressure sensing data and judge whether table tennis hits net.
The pressure sensor for being deployed in net face obtains the pressure hit by racket after the moment according to sampling time interval T
Sensing data, it is then forwarded to server.Server obtains the pressure sensing data of same sampling instant, when having and only one
When pressure sensing data are more than X, then table tennis hits net after judging fair catch；Otherwise judge that this sampling instant is not rattled
Ball impact net.
Step 4.3, obtain racket pressure sensing data and judge whether table tennis is hit by racket.
The pressure sensor for being deployed in racket face obtains the pressure hit by racket after the moment according to sampling time interval T
Sensing data, it is then forwarded to server.Server obtains the pressure sensing data of same sampling instant, when having and only one
When pressure sensing data are more than X, then judge that this sampling instant table tennis is hit by racket, note variable z is the ball for hitting table tennis
Clap numbering；Table tennis is hit by one's own side's racket again after judging fair catch if the x=z；After judging fair catch if x ≠ z
Table tennis is hit by other side's racket.Otherwise judge that this sampling instant table tennis is not hit by racket.
Step 5, judge whether table tennis lands
Judge whether k is less than N, if k<N, then make k=k+1, return to step 4；Otherwise ping-pong after judgement fair catch
Landing is connect, is terminated.
Racket judges whether that fair catch and ball move towards method flow diagram after hitting table tennis, as shown in Figure 3.For convenience of table
Show, the related content of step 4.1, step 4.2 and step 4.3 is shown in order in figure 3, is actually to perform simultaneously.
The system and method for the present invention this have the advantage that：
(1) applying pressure sensor can simply and effectively judge table tennis impact bead table, the racket when table tennis is played a game
Time and position with net.
(2) using Internet of Things network method realize when table tennis is played a game racket hit determine whether after table tennis fair catch and
The trend of ball after receiving, it can simply and effectively identify state of the table tennis when playing a game.
Brief description of the drawings
Fig. 1 is the structural representation of the table tennis system based on pressure sensor of the present invention；
Fig. 2 is to judge whether that fair catch and ball move towards system block diagram after the racket of the present invention hits table tennis；
Fig. 3 is to judge whether that fair catch and ball move towards method flow diagram after the racket of the present invention hits table tennis；
Fig. 4 is the ping-pong table numbering and racket numbering schematic diagram of the embodiment of the present invention.
Embodiment
The preferred embodiment of the present invention is elaborated below.
Fair catch of the present invention refers to hitting from other side and fly by the way of table tennis rule is met in playing a game
The summary of the table tennis to come over.
Pressure sensor after object pressure by deforming upon so as to producing pressure sensing data.As shown in figure 1, rattling
Ball desktop, racket face and net face dispose pressure sensor and obtain pressure sensing data respectively, are then forwarded to server, service
Device obtains the pressure sensing data of same sampling instant and judges whether table tennis hits table, hits or hit net by racket.Rattling
Ball is played a game, and middle both sides are round to receive, and after table tennis is hit by racket, server determines whether according to the historical data before shock
Fair catch, known according to the pressure sensing data that pressure sensor is sent on table tennis desktop, racket face and net face after shock
The trend of other table tennis.It is the summary that net is hit to table tennis that table tennis of the present invention, which hits net,；It is of the present invention to hit
Bat is the summary hit to table tennis by racket；The table of the present invention that hits is the summary to table tennis impact bead table.The present invention
Described desktop refers to table tennis desktop；Wire side of the present invention refers to table tennis wire side；Face of the present invention refers to
Table tennis.
Table tennis both sides' numbering of playing a game is that A and B, then ball table and racket numbering are the numbering of its corresponding side of playing a game.In ball
Pressure sensor is disposed in desktop, net face and racket face respectively, and pressure sensitive region is covered each by whole desktop, wire side and bat
Face.Sampling time interval T is set, and its value is less than the average time interval that middle table tennis hits twice of playing a game (according to historical data
Statistics obtains)；Positive integer M and N are set；The threshold X for judging table tennis ball impact is set.State that variable i represents table tennis by racket
Hit, when table tennis is hit by racket, then i=1, otherwise i=0；Statement variable j represents that table tennis hits table, when table tennis is hit
Bat table when, then j=1, otherwise j=0；Statement variable m represents that table tennis hits net, and when table tennis hits net, then m=1, no
Then m=0.In the present embodiment, the both sides that play a game numbering is A and B, and it is A that ping-pong table both sides are numbered respectively according to its corresponding side of playing a game
And B, corresponding racket numbering are A and B, as shown in Figure 4；36 piezoelectric film sensors are affixed one's name on table tennis desktop top, in ball
Face disposes 12 piezoelectric film sensors, in 8 piezoelectric film sensors of net face administration.Set interval T=10 millis
Second；Positive integer M=150, N=50 are set；Threshold X=5 millivolt (mV) for judging table tennis ball impact are set；State that variable i represents
Table tennis is hit by racket, when table tennis is hit by racket, then i=1, otherwise i=0；Statement variable j represents that table tennis is hit
Table, when table tennis impact bead table, then j=1, otherwise j=0；Statement variable m represents that table tennis hits net, when table tennis impact bead
During net, then m=1, otherwise m=0.
The pressure sensor for being deployed in racket face, ball desktop and net face obtains pressure sensing according to sampling time interval T
Data, it is then forwarded to server；Server obtains the pressure sensing data of same sampling instant, according to racket, ball table and ball
The pressure sensing data of net calculate each sampling instant variable i, variable j and variable m value and record.In the present embodiment, net
The piezoelectric film sensor of face and the deployment of ball desktop obtains voltage data according to sampling time interval T respectively, is then forwarded to clothes
Business device, server judge to obtain variable i, variable m and variable according to the voltage data of racket, ball table and the same sampling instant of net
J value；A voltage data 7mV be present in the voltage data in the racket face that server sampling instant obtains>5mV, then record
Variable i=1, record racket numbering is B.
The racket of the present invention judges whether that fair catch and ball move towards system after hitting table tennis, including reads historical data
And determine whether fair catch module, obtain ball table pressure sensing data and judge table tennis whether impact bead table module,
Obtain the pressure sensing data of net and judge whether table tennis hits net module, the pressure sensing data for obtaining racket and judge table tennis
Pang ball whether by racket hit module, judge whether table tennis lands module.
Read historical data and determine whether fair catch module：It is the racket numbering for hitting table tennis to remember variable x；Read
Take the value that continuous N sampling instant variable i, variable j and variable m before the moment are hit by racket, variable i, variable j and variable m
(the 1st behavior corresponds to the value of variable i to 3 × M of order composition of the value according to sampling instant from back to front matrix H, and the 2nd behavior is corresponding
Variable j value, value of the 3rd behavior to dependent variable m), racket hits frequency n1The element number of variable i=1 as in matrix H,
Record the row number m that the last racket hits in matrix1, note variable x1For the last racket numbering for hitting table tennis；Hit table
Frequency n2Variable j=1 element number as in matrix H, record the last row number m for hitting table in matrix2, note variable x2For
The ball table numbering that the last time hits；Hit net frequency n3Variable m=1 element number as in matrix H.Meet n when simultaneously1=
n2=1, m1>m2、n3≤1、x1≠x、x2During=x, then it is fair catch to judge that this sampling instant racket hits table tennis, sets and becomes
Measure k=1, at the same enter the pressure sensing data for obtaining ball table and judge table tennis whether impact bead table module, acquisition net
Pressure sensing data and judge table tennis whether hit net module, obtain racket pressure sensing data and judge table tennis whether by
Racket hits module；Otherwise it is not fair catch to judge that this sampling instant racket hits table tennis.In the present embodiment, table tennis is hit
The racket numbering of ball is B, i.e. x=B；Continuous 150 sampling instant variable is, j, m value before this sampling instant is carved are read, according to
The order of sampling instant from back to front forms 3 × 150 matrix H, and the element of wherein variable i=1 only has one, for the 75th row
Element (m1=75), i.e. n1=1, the racket numbering that the last time hits table tennis is A, i.e. x1=A；Variable j=1 element is only
There is one, for the element (m of the 35th row2=35), i.e. n2=1, the numbering of the last impact bead table is B, i.e. x2=B；Variable m
Value be 0, i.e. n3=0.Meet n simultaneously1=n2=1, m1>m2、n3≤1、x1≠x、x2=x, then judge this sampling instant racket
It is fair catch to hit table tennis, sets variable k=1, while enters the pressure sensing data for obtaining ball table and judge table tennis
Whether impact bead table module, obtain net pressure sensing data and judge table tennis whether hit net module, acquisition racket pressure
Power sensing data and judge whether table tennis by racket hits module.
Obtain ball table pressure sensing data and judge table tennis whether impact bead table module：It is deployed in the pressure of ball desktop
Sensor obtains the pressure sensing data hit by racket after the moment 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 are more than X, then judges
This sampling instant table tennis impact bead table, note variable y are the ball table numbering hit；If x ≠ y, rattled after judging fair catch
Ball falls on other side's desktop；If x=y, table tennis drops back into one's own side's desktop after judging fair catch.Otherwise judge that this sampling instant does not have
Have and table tennis impact bead table occurs.In the present embodiment, 36 pressure sensors of ball desktop are deployed according to sampling time interval T
The voltage data after the table moment is hit in acquisition, is then forwarded to server.Server is sentenced according to the voltage data of the sampling instant
Disconnected table tennis whether impact bead table.During k=1, table tennis impact bead table does not occur.
Obtain the pressure sensing data of net and judge whether table tennis hits net module：It is deployed in the pressure sensing in net face
Device obtains the pressure sensing data hit by racket after the moment according to sampling time interval T, is then forwarded to server.Service
Device obtains the pressure sensing data of same sampling instant, and when having and only a pressure sensing data are more than X, then it is legal to judge
Table tennis hits net after receiving；Otherwise judge that this sampling instant does not occur table tennis and hits net.In the present embodiment, ball is deployed in
8 pressure sensors of wire side obtain the voltage data hit after the table moment according to sampling time interval T, are then forwarded to service
Device.Server judges whether table tennis hits net according to the voltage data of the sampling instant.During k=1, table tennis does not occur and hits
Net.
Obtain the pressure sensing data of racket and judge whether table tennis by racket hits module：It is deployed in the pressure in racket face
Force snesor obtains the pressure sensing data hit by racket after the moment according to sampling time interval T, is then forwarded to service
Device.Server obtains the pressure sensing data of same sampling instant, when having and only a pressure sensing data are more than X, then
Judge that this sampling instant table tennis is hit by racket, note variable z is the racket numbering for hitting table tennis；It is legal to judge if x=z
Table tennis is hit by one's own side's racket again after receiving；Table tennis is hit by other side's racket after judging fair catch if x ≠ z.It is no
Then judge that this sampling instant table tennis is not hit by racket.In the present embodiment, 12 pressure sensors in racket face are deployed in
The voltage data after the table moment is hit according to sampling time interval T acquisitions, is then forwarded to server.Server is according to the sampling
The voltage data at moment judges whether table tennis is hit by racket.During k=1, table tennis does not occur and is hit by racket.
Judge whether table tennis lands module：When table tennis does not have impact bead table and without shock net and not by racket
During shock, then judge whether k is less than N.If k<N, then k=k+1 is made, while return to the pressure sensing data for obtaining ball table and judgement
Table tennis whether impact bead table module, obtain net pressure sensing data and judge table tennis whether hit net module and acquisition ball
The pressure sensing data of bat and judge whether table tennis by racket hits module；Otherwise table tennis directly falls after judging fair catch
Ground.In the present embodiment, during k=1, k<N=50, make k=k+1=2.The pressure sensing data for obtaining ball table and judgement are returned simultaneously
Table tennis whether impact bead table module, obtain net pressure sensing data and judge table tennis whether hit net module and acquisition ball
The pressure sensing data of bat and judge whether table tennis by racket hits module.
During k=2, judge that table tennis does not have impact bead table, without impact bead by the pressure sensing data of the sampling instant
Net, do not hit by racket.k<N=50, make k=k+1=3.The pressure sensing data for obtaining ball table are returned simultaneously and judge table tennis
Pang ball whether impact bead table module, obtain net pressure sensing data and judge table tennis whether hit net module and acquisition racket
Pressure sensing data and judge whether table tennis by racket hits module.
During k=3, judge that table tennis hits net by the pressure sensing data of the net sampling instant, then it is legal to judge
Table tennis hits net after receiving.This sampling instant system operation terminates.
The racket of the present invention judges whether that fair catch and ball move towards method according to the following steps after hitting table tennis：
Step 1, the numbering and correlated variables that racket and ball table are set.
Table tennis both sides' numbering of playing a game is that A and B, then ball table and racket numbering are the numbering of its corresponding side of playing a game.In ball
Pressure sensor is disposed in desktop, net face and racket face respectively, and pressure sensitive region is covered each by whole desktop, wire side and bat
Face.Sampling time interval T is set, and its value is less than the average time interval that middle table tennis hits twice of playing a game (according to historical data
Statistics obtains)；Positive integer M and N are set；The threshold X for judging table tennis ball impact is set.State that variable i represents table tennis by racket
Hit, when table tennis is hit by racket, then i=1, otherwise i=0；Statement variable j represents that table tennis hits table, when table tennis is hit
Bat table when, then j=1, otherwise j=0；Statement variable m represents that table tennis hits net, and when table tennis hits net, then m=1, no
Then m=0.In the present embodiment, the both sides that play a game numbering is A and B, and it is A that ping-pong table both sides are numbered respectively according to its corresponding side of playing a game
And B, corresponding racket numbering are A and B, as shown in Figure 4；36 piezoelectric film sensors are affixed one's name on table tennis desktop top, in ball
Face disposes 12 piezoelectric film sensors, in 8 piezoelectric film sensors of net face administration.Set interval T=10 millis
Second；Positive integer M=150, N=50 are set；Threshold X=5 millivolt (mV) for judging table tennis ball impact are set；State that variable i represents
Table tennis is hit by racket, when table tennis is hit by racket, then i=1, otherwise i=0；Statement variable j represents that table tennis is hit
Table, when table tennis impact bead table, then j=1, otherwise j=0；Statement variable m represents that table tennis hits net, when table tennis impact bead
During net, then m=1, otherwise m=0.
Step 2, record variable i, variable j and variable m value.
The pressure sensor for being deployed in racket face, ball desktop and net face obtains pressure sensing according to sampling time interval T
Data, it is then forwarded to server；Server obtains the pressure sensing data of same sampling instant, according to racket, ball table and ball
The pressure sensing data of net calculate each sampling instant variable i, variable j and variable m value and record；When variable i=1, then
Into step 3；Otherwise return to step 2.In the present embodiment, net face and ball desktop deployment piezoelectric film sensor respectively according to
Sampling time interval T obtains voltage data, is then forwarded to server, and server is according to the voltage number of racket, ball table and net
It is judged that obtain the value of variable i, variable m and variable j；Exist in the voltage data in the racket face that server sampling instant obtains
One voltage data 7mV>5mV, then simultaneously record variable i=1 is calculated, record racket numbering is B, into step 3.
Step 3, read historical data and determine whether fair catch.
It is the racket numbering for hitting table tennis to remember variable x；Read by continuous N sampling instant variable before the racket shock moment
I, variable j and variable m value, the value of variable i, variable j and variable m form 3 × M's according to the order of sampling instant from back to front
Matrix H (the 1st behavior corresponds to the value of variable i, and the 2nd behavior is to dependent variable j value, value of the 3rd behavior to dependent variable m), racket is hit
Hit frequency n1The element number of variable i=1 as in matrix H, record the row number m that the last racket hits in matrix1, note change
Measure x1For the last racket numbering for hitting table tennis；Hit table frequency n2Variable j=1 element number as in matrix H, note
The last row number m for hitting table in record matrix2, note variable x2The ball table numbering hit for the last time；Hit net frequency n3As square
Variable m=1 element number in battle array H.Meet n when simultaneously1=n2=1, m1>m2、n3≤1、x1≠x、x2During=x, then this is judged
It is fair catch that sampling instant racket, which hits table tennis, variable k=1 is set, into step 4；Otherwise this sampling instant ball is judged
It is not fair catch to clap shock table tennis, is terminated.In the present embodiment, the racket numbering for hitting table tennis is B, i.e. x=B；Read
Continuous 150 sampling instant variable is, j, m value before this sampling instant is carved, 3 are formed according to the order of sampling instant from back to front
The element of × 150 matrix H, wherein variable i=1 only has one, for the element (m of the 75th row1=75), i.e. n1=1, nearest one
The secondary racket numbering for hitting table tennis is A, i.e. x1=A；Variable j=1 element only has one, for the element (m of the 35th row2=
35), i.e. n2=1, the numbering of the last impact bead table is B, i.e. x2=B；Variable m value is 0, i.e. n3=0.Meet simultaneously
n1=n2=1, m1>m2、n3≤1、x1≠x、x2=x, then it is fair catch to judge that this sampling instant racket hits table tennis, is set
Variable k=1, into step 4.
Step 4 at the same obtain the pressure sensing data of ball table, net and racket and judge table tennis whether impact bead table,
Net or racket.Perform step 4.1, step 4.2 and step 4.3 simultaneously.
Step 4.1, obtain ball table pressure sensing data and judge table tennis whether impact bead table.
The pressure sensor for being deployed in ball desktop obtains the pressure hit by racket after the moment according to sampling time interval T
Sensing data, it is then forwarded to server.Server obtains the pressure sensing data of same sampling instant, when having and only one
When pressure sensing data are more than X, then this sampling instant table tennis impact bead table is judged, note variable y is the ball table numbering hit；If
X ≠ y, then table tennis falls on other side's desktop after judging fair catch；If x=y, table tennis drops back into one's own side after judging fair catch
Desktop.Otherwise judge that table tennis impact bead table does not occur for this sampling instant.In the present embodiment, 36 pressures of ball desktop are deployed in
Force snesor obtains the voltage data hit after the table moment according to sampling time interval T, is then forwarded to server.Server root
According to the voltage data of the sampling instant judge table tennis whether impact bead table.During k=1, table tennis impact bead table does not occur.
Step 4.2, obtain net pressure sensing data and judge whether table tennis hits net.
The pressure sensor for being deployed in net face obtains the pressure hit by racket after the moment according to sampling time interval T
Sensing data, it is then forwarded to server.Server obtains the pressure sensing data of same sampling instant, when having and only one
When pressure sensing data are more than X, then table tennis hits net after judging fair catch；Otherwise judge that this sampling instant is not rattled
Ball impact net.In the present embodiment, it is deployed in 8 pressure sensors in net face and is obtained according to sampling time interval T when hitting table
Voltage data after quarter, is then forwarded to server.Server judges that table tennis is according to the voltage data of the sampling instant
It is no to hit net.During k=1, table tennis does not occur and hits net.
Step 4.3, obtain racket pressure sensing data and judge whether table tennis is hit by racket.
The pressure sensor for being deployed in racket face obtains the pressure hit by racket after the moment according to sampling time interval T
Sensing data, it is then forwarded to server.Server obtains the pressure sensing data of same sampling instant, when having and only one
When pressure sensing data are more than X, then judge that this sampling instant table tennis is hit by racket, note variable z is the ball for hitting table tennis
Clap numbering；Table tennis is hit by one's own side's racket again after judging fair catch if the x=z；After judging fair catch if x ≠ z
Table tennis is hit by other side's racket.Otherwise judge that this sampling instant table tennis is not hit by racket.In the present embodiment, it is deployed in
12 pressure sensors in racket face obtain the voltage data hit after the table moment according to sampling time interval T, are then forwarded to
Server.Server judges whether table tennis is hit by racket according to the voltage data of the sampling instant.During k=1, do not occur
Table tennis is hit by racket.
Step 5, judge whether table tennis lands
Judge whether k is less than N, if k<N, then make k=k+1, return to step 4；Otherwise ping-pong after judgement fair catch
Landing is connect, is terminated.In the present embodiment, during k=1, k<N=50, make k=k+1=2.Return to step 4.
During k=2, judge that table tennis does not have impact bead table, without impact bead by the pressure sensing data of the sampling instant
Net, do not hit by racket.k<N=50, make k=k+1=3.Return to step 4.
During k=3, judge that table tennis hits net by the pressure sensing data of the net sampling instant, then it is legal to judge
Table tennis hits net after receiving.Terminate.
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)
1. racket judges whether that fair catch and ball move towards system after hitting table tennis, it is characterised in that including reading historical data
And determine whether fair catch module, obtain ball table pressure sensing data and judge table tennis whether impact bead table module,
Obtain the pressure sensing data of net and judge whether table tennis hits net module, the pressure sensing data for obtaining racket and judge table tennis
Pang ball whether by racket hit module, judge whether table tennis lands module.
2. racket according to claim 1 judges whether that fair catch and ball move towards system after hitting table tennis, it reads
Historical data and determine whether that fair catch module is characterised by：It is the racket numbering for hitting table tennis to remember variable x；Read
The value of continuous N sampling instant variable i, variable j and variable m before the moment is hit by racket, wherein M is positive integer, and variable i represents
Table tennis is hit by racket, when table tennis is hit by racket, then i=1, otherwise i=0；Variable j represents that table tennis hits table, when
During table tennis impact bead table, then j=1, otherwise j=0；Variable m represents that table tennis hits net, when table tennis hits net, then m=
1, otherwise m=0；The value of variable i, variable j and variable m forms 3 × M matrix H, ball according to the order of sampling instant from back to front
Clap and hit frequency n1The element number of variable i=1 as in matrix H, record the row number m that the last racket hits in matrix1,
Remember variable x1For the last racket numbering for hitting table tennis；Hit table frequency n2Variable j=1 element as in matrix H
Number, record the last row number m for hitting table in matrix2, note variable x2The ball table numbering hit for the last time；Hit net frequency n3
Variable m=1 element number as in matrix H；Meet n when simultaneously1=n2=1, m1>m2、n3≤1、x1≠x、x2During=x, then
It is fair catch to judge that now racket hits table tennis, sets variable k=1, while enter the pressure sensing data for obtaining ball table
And judge table tennis whether impact bead table module, obtain net pressure sensing data and judge table tennis whether hit net module,
Obtain the pressure sensing data of racket and judge whether table tennis by racket hits module, otherwise judge that now racket hits and rattle
Ball is not fair catch.
3. racket according to claim 1 judges whether that fair catch and ball move towards system after hitting table tennis, it is obtained
The pressure sensing data of ball table and judge whether impact bead table module is characterised by table tennis：The pressure for being deployed in ball desktop passes
Sensor obtains the pressure sensing data hit by racket after the moment according to the sampling time interval T set in advance, then sends
To server；Server obtains the pressure sensing data of same sampling instant, when having and only a pressure sensing data are more than X
When, wherein X is the threshold value of the judgement table tennis ball impact set in advance, then judges now table tennis impact bead table, and note variable y is to hit
The ball table numbering hit；If x ≠ y, table tennis falls on other side's desktop after judging fair catch, if x=y, judges fair catch
Table tennis drops back into one's own side's desktop afterwards；Otherwise judge now without generation table tennis impact bead table.
4. racket according to claim 1 judges whether that fair catch and ball move towards system after hitting table tennis, it is obtained
The pressure sensing data of net and judge whether table tennis hits net module and be characterised by：It is deployed in the pressure sensor in net face
Obtained according to sampling time interval T by the pressure sensing data after the racket shock moment, be then forwarded to server；Server
The pressure sensing data of same sampling instant are obtained, when having and only a pressure sensing data are more than X, then judge legal connect
Table tennis hits net after ball, otherwise judges now to hit net without generation table tennis.
5. racket according to claim 1 judges whether that fair catch and ball move towards system after hitting table tennis, it is obtained
The pressure sensing data of racket and judge table tennis whether by racket hit module be characterised by：It is deployed in the pressure in racket face
Sensor obtains the pressure sensing data hit by racket after the moment 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 are more than X, then judges
Now table tennis is hit by racket, and note variable z is the racket numbering for hitting table tennis；Rattled after judging fair catch if the x=z
Ball is hit by one's own side's racket again, and table tennis is hit by other side's racket after judging fair catch if x ≠ z；Otherwise judge now
Table tennis is not hit by racket.
6. racket according to claim 1 judges whether that fair catch and ball move towards system after hitting table tennis, it judges
Whether table tennis, which lands module, is characterised by：When table tennis does not have impact bead table and not shock net and is not hit by racket
When hitting, then judge whether k is less than N, wherein N is positive integer；If k<N, then k=k+1 is made, while return to the pressure biography for obtaining ball table
Sense data and judge table tennis whether impact bead table module, acquisition net pressure sensing data and judge whether table tennis hits net
Module and obtain the pressure sensing data of racket and judge whether table tennis by racket hits module, otherwise after judgement fair catch
Table tennis directly lands.
7. racket judges whether that fair catch and ball move towards method after hitting table tennis, it is characterised in that：
Step 1, the numbering and correlated variables that racket and ball table are set；
Step 2, record variable i, variable j and variable m value；
Step 3, read historical data and determine whether fair catch；
Step 4 at the same obtain the pressure sensing data of ball table, net and racket and judge table tennis whether impact bead table, net
Or racket；
Step 5, judge whether table tennis lands.
8. racket according to claim 7 judges whether that fair catch and ball move towards method after hitting table tennis, its step
1st, step 2 and step 3 are characterised by：
Step 1：Table tennis both sides' numbering of playing a game is that A and B, then ball table and racket numbering are the numbering of its corresponding side of playing a game；
Pressure sensor is disposed in ball desktop, net face and racket face respectively, and pressure sensitive region is covered each by whole desktop, wire side and bat
Face；Sampling time interval T is set；Positive integer M and N are set；The threshold X for judging table tennis ball impact is set；State that variable i represents table tennis
Pang ball is hit by racket, when table tennis is hit by racket, then i=1, otherwise i=0；Statement variable j represents that table tennis hits table,
When table tennis impact bead table, then j=1, otherwise j=0；Statement variable m represents that table tennis hits net, when table tennis hits net
When, then m=1, otherwise m=0；
Step 2：The pressure sensor for being deployed in racket face, ball desktop and net face obtains pressure biography according to sampling time interval T
Feel data, be then forwarded to server；Server obtains the pressure sensing data of same sampling instant, according to racket, ball table and
The pressure sensing data of net calculate each sampling instant variable i, variable j and variable m value and record；When variable i=1,
Then enter step 3, otherwise return to step 2；
Step 3：It is the racket numbering for hitting table tennis to remember variable x；Continuous N sampling instant before hitting the moment by racket is read to become
I, variable j and variable m value are measured, the value of variable i, variable j and variable m forms 3 × M according to the order of sampling instant from back to front
Matrix H, racket hit frequency n1The element number of variable i=1 as in matrix H, record the last racket in matrix and hit
The row number m hit1, note variable x1For the last racket numbering for hitting table tennis；Hit table frequency n2Variable j=as in matrix H
1 element number, record the last row number m for hitting table in matrix2, note variable x2The ball table numbering hit for the last time；Hit
Net frequency n3Variable m=1 element number as in matrix H；Meet n when simultaneously1=n2=1, m1>m2、n3≤1、x1≠x、x2=
During x, then it is fair catch to judge that now racket hits table tennis, sets variable k=1, into step 4, otherwise judges now ball
It is not fair catch to clap shock table tennis, is terminated.
9. racket according to claim 7 judges whether that fair catch and ball move towards method after hitting table tennis, its step 4
It is characterised by：Perform step 4.1, step 4.2 and step 4.3 simultaneously；
Step 4.1, obtain ball table pressure sensing data and judge table tennis whether impact bead table：It is deployed in the pressure of ball desktop
Sensor obtains the pressure sensing data hit by racket after the moment 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 are more than X, then judges
Now table tennis impact bead table, note variable y are the ball table numbering hit；If x ≠ y, table tennis is fallen on after judging fair catch
Other side's desktop, if x=y, table tennis drops back into one's own side's desktop after judging fair catch；Otherwise judge now without generation table tennis
Impact bead table；
Step 4.2, obtain net pressure sensing data and judge whether table tennis hits net：It is deployed in the pressure sensing in net face
Device obtains the pressure sensing data hit by racket after the moment according to sampling time interval T, is then forwarded to server；Service
Device obtains the pressure sensing data of same sampling instant, and when having and only a pressure sensing data are more than X, then it is legal to judge
Table tennis hits net after receiving, and otherwise judges now to hit net without generation table tennis；
Step 4.3, obtain racket pressure sensing data and judge whether table tennis is hit by racket：It is deployed in the pressure in racket face
Force snesor obtains the pressure sensing data hit by racket after the moment according to sampling time interval T, is then forwarded to service
Device；Server obtains the pressure sensing data of same sampling instant, when having and only a pressure sensing data are more than X, then
Judge that now table tennis is hit by racket, note variable z is the racket numbering for hitting table tennis；After judging fair catch if the x=z
Table tennis is hit by one's own side's racket again, and table tennis is hit by other side's racket after judging fair catch if x ≠ z；Otherwise judge
Now table tennis is not hit by racket.
10. racket according to claim 7 judges whether that fair catch and ball move towards method after hitting table tennis, its step
5 are characterised by：Judge whether k is less than N, if k<N, then make k=k+1, return to step 4；Otherwise rattled after judging fair catch
Ball directly lands, and terminates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711072472.8A CN107694073A (en) | 2017-11-03 | 2017-11-03 | Racket judges whether that fair catch and ball move towards system and method after hitting table tennis |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711072472.8A CN107694073A (en) | 2017-11-03 | 2017-11-03 | Racket judges whether that fair catch and ball move towards system and method after hitting table tennis |
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| US20150360114A1 (en) * | 2014-06-12 | 2015-12-17 | Indian Industries, Inc. | Automated scoring system for table tennis |
| CN106669114A (en) * | 2017-01-10 | 2017-05-17 | 悦物电子科技(上海)有限公司 | Method and device for obtaining impact point spatio-temporal information |
| CN106730715A (en) * | 2017-01-20 | 2017-05-31 | 南京晓庄学院 | Table tennis intelligent training equipment |
| CN106999752A (en) * | 2014-11-20 | 2017-08-01 | 友电子有限公司 | Ping-pong contest execution system including multiples impacts sensor and the ping-pong contest fraction display methods using the system |
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2017
- 2017-11-03 CN CN201711072472.8A patent/CN107694073A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150360114A1 (en) * | 2014-06-12 | 2015-12-17 | Indian Industries, Inc. | Automated scoring system for table tennis |
| CN106999752A (en) * | 2014-11-20 | 2017-08-01 | 友电子有限公司 | Ping-pong contest execution system including multiples impacts sensor and the ping-pong contest fraction display methods using the system |
| CN106669114A (en) * | 2017-01-10 | 2017-05-17 | 悦物电子科技(上海)有限公司 | Method and device for obtaining impact point spatio-temporal information |
| CN106730715A (en) * | 2017-01-20 | 2017-05-31 | 南京晓庄学院 | Table tennis intelligent training equipment |
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Application publication date: 20180216 |