CN107941190A - A kind of system and method for the angle for identifying table tennis impact bead table - Google Patents
A kind of system and method for the angle for identifying table tennis impact bead table Download PDFInfo
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- CN107941190A CN107941190A CN201711071510.8A CN201711071510A CN107941190A CN 107941190 A CN107941190 A CN 107941190A CN 201711071510 A CN201711071510 A CN 201711071510A CN 107941190 A CN107941190 A CN 107941190A
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- table tennis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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Abstract
The invention discloses a kind of system and method for the angle for identifying table tennis impact bead table.Its system include obtain pressure sensing data and judge table tennis whether impact bead table module, calculate table tennis impact bead table position module, calculating table tennis impact bead table angle module.In advance establish coordinate system and division desktop area, and continue carry out table tennis positioning, obtain pressure sensing data, judge table tennis whether impact bead table module according to the pressure data that table tennis impact bead table produces judge table tennis whether impact bead table；The position module for calculating table tennis impact bead table divides the position for calculating table tennis impact bead table by desktop area；The angle module for calculating table tennis impact bead table calculates the angle hit according to impingement position and previous moment table tennis locus.The present invention solves the problems, such as that the Internet of Things scheme of ping-pong table cannot identify table tennis impact bead table angle.
Description
Technical field
The invention belongs to smart table tennis Motion Technology field, more particularly to a kind of angle for identifying table tennis impact bead table
The system and method for degree.
Background technology
The Internet of Things modification scheme of ping-pong table mainly has two kinds at present, and one kind is the high precision instruments such as installation camera,
Obtain the video or view data of table tennis；Another kind is the installation piezoelectricity sensing unit on ball table desktop, obtains table tennis
The data of ball impact ball table.Two schemes cannot identify the angle of table tennis impact bead table.A kind of identification table tennis is proposed for this
The system and method for the angle of ball impact ball table.
The content of the invention
The technical problems to be solved by the invention are that the Internet of Things scheme of ping-pong table cannot identify table tennis impact bead table
The problem of angle, propose a kind of system and method for the angle for identifying table tennis impact bead table.
The present invention is based on pressure sensor and table tennis location technology, and pressure sensor can be according to object pressure
Certain deformation is presented and obtains pressure sensing data, table tennis location technology refer to according to existing Internet of things device and
Method calculates the technology of table tennis position during the motion.As shown in Figure 1, on ping-pong table dispose pressure sensor and
For the Internet of Things screen component (such as signal strength location technology) of table tennis positioning, pressure sensing data and table tennis are obtained
Position data, is then forwarded to server, and server calculates table tennis according to pressure sensing data and table tennis position data
The angle of impact bead table.
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.Table tennis desktop uniformly disposes N number of pressure sensor, and N is positive integer, according to N
Ball desktop is divided into N number of region and numbered by the position of a pressure sensor, and pressure sensor is located at the center in each region, pressure
Sensor number is consistent with ball desktop area numbering.Sampling time interval T is set, its value is less than middle table tennis impact bead table of playing a game
Average time interval (according to historical data count obtain).The pressure sensing data that table tennis impact bead table produces are set most
Small threshold value L and max-thresholds H.
Using existing table tennis location technology and device, position coordinates of the table tennis in each sampling instant is calculated
Value.
A kind of system for the angle for identifying table tennis impact bead table, including obtain pressure sensing data and judge that table tennis is
No impact bead table module, the position module for calculating table tennis impact bead table, the angle module for calculating table tennis impact bead table.
Obtain pressure sensing data and judge table tennis whether impact bead table module：The pressure for being deployed in table tennis desktop passes
Feel equipment and obtain pressure sensing data according to sampling time interval T, then by pressure sensing data sending to server；Server
In the pressure sensing data of the same sampling instant obtained, when having and only a pressure sensing data u meets L≤u≤H
When, then this sampling instant table tennis ball impact ping-pong table is judged, into the position module for calculating table tennis impact bead table；Otherwise return
Return obtain pressure sensing data and judge table tennis whether impact bead table module.
Calculate the position module of table tennis impact bead table：The corresponding pressure sensor numberings of pressure sensing data u are read, with
The corresponding ball desktop area center of the numbering is the position of table tennis impact bead table；Sat according to ping-pong table in three dimensions
Position in mark system, calculates the position coordinate value of table tennis impact bead table, is denoted as (xu,yu,0)；Into calculating table tennis impact bead
The angle module of table.
Calculate the angle module of table tennis impact bead table：Transfer the table tennis position coordinate value (x of previous sampling instantv,yv,zv)；
Angle [alpha]=arcsin (h/f) of table tennis impact bead table is calculated, wherein
H=zv；Return obtain pressure sensing data and judge table tennis whether impact bead table module.
The system block diagram of the angle of the identification table tennis impact bead table of the present invention is as shown in Figure 2.
A kind of method for the angle for identifying table tennis impact bead table is according to the following steps：
Step 1, division ping-pong table region and arrange parameter.
Ball desktop is divided into according to the N number of pressure sensor uniformly disposed on table tennis desktop by N number of region and is numbered, N
It is positive integer, pressure sensor is located at the center in each region, and pressure sensor numbering is consistent with ball desktop area numbering；Establish three
Dimension space coordinate system, origin are ping-pong table center, and x-axis and y-axis composition horizontal plane, z-axis are upward perpendicular to desktop；Setting is adopted
Sample time interval T；The minimum threshold L and max-thresholds H of the pressure sensing data of table tennis ball impact desktop generation are set.
Step 2, the position coordinate value for calculating table tennis.
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 table tennis whether impact bead table.
The N number of pressure sensing device for being deployed in table tennis desktop obtains pressure sensing data according to sampling time interval T, so
Afterwards by pressure sensing data sending to server；In the pressure sensing data for the same sampling instant that server obtains, when having
And when only a pressure sensing data u meets L≤u≤H, then judge this sampling instant table tennis ball impact ping-pong table, enter
Step 4；Otherwise return to step 2.
Step 4, the position for calculating table tennis impact bead table.
The corresponding pressure sensor numberings of pressure sensing data u are read, with the corresponding ball desktop area centre bit of the numbering
It is set to the position of table tennis impact bead table；According to position of the ping-pong table in three-dimensional coordinate system, table tennis ball impact is calculated
The position coordinate value of ball table, is denoted as (xu,yu,0)。
Step 5, the angle for calculating table tennis impact bead table.
Transfer the table tennis position coordinate value (x of previous sampling instantv,yv,zv)；Calculate the angle [alpha] of table tennis impact bead table
=arcsin (h/f), whereinH=zv；Return to step 2.
The flow chart of the method for the angle of the identification table tennis impact bead table of the present invention is as shown in Figure 3.
The system and method for the present invention this have the advantage that：Pass through combination pressure sensor tactile feedback technology and table tennis
Motion positions technology, calculates the angle of table tennis impact bead table exactly.
Brief description of the drawings
Fig. 1 is the ping-pong sport system structure diagram of the identification table tennis impact bead table angle of the present invention；
Fig. 2 is the system block diagram of the angle of present invention identification table tennis impact bead table；
Fig. 3 is the method flow diagram of the angle of present invention identification table tennis impact bead table；
Fig. 4 is the three-dimensional coordinate system schematic diagram of the embodiment of the present invention；
Fig. 5 is the ping-pong table region division and numbering schematic diagram of the embodiment of the present invention.
Embodiment
Elaborate below to the preferred embodiment of the present invention.
The present invention is based on pressure sensor and table tennis location technology, and pressure sensor can be according to object pressure
Certain deformation is presented and obtains pressure sensing data, table tennis location technology refer to according to existing Internet of things device and
Method calculates the technology of table tennis position during the motion.As shown in Figure 1, on ping-pong table dispose pressure sensor and
For the Internet of Things screen component (such as signal strength location technology) of table tennis positioning, pressure sensing data and table tennis are obtained
Position data, is then forwarded to server, and server calculates table tennis according to pressure sensing data and table tennis position data
The angle of impact bead table.
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.Table tennis desktop uniformly disposes N number of pressure sensor, and N is positive integer, according to N
Ball desktop is divided into N number of region and numbered by the position of a pressure sensor, and pressure sensor is located at the center in each region, pressure
Sensor number is consistent with ball desktop area numbering.Sampling time interval T is set, its value is less than middle table tennis impact bead table of playing a game
Average time interval (according to historical data count obtain).The pressure sensing data that table tennis impact bead table produces are set most
Small threshold value L and max-thresholds H.In the present embodiment, the origin of establishing three-dimensional coordinate system is ping-pong table center, table tennis
Table center refers to the intersection point of table tennis net central shaft and ping-pong table, and x-axis is parallel to ping-pong table narrow side, and y-axis is parallel to table tennis
Pang ball table long side, z-axis is upward perpendicular to desktop, as shown in Figure 4.Table tennis desktop uniformly disposes 24 piezoelectric film sensors,
That is N=24, so that ping-pong table is divided into 24 regions, piezoelectric film sensor is located at the center in each region, and each region is pressed
Numbered according to certain order (from left to right, from top to bottom) with Arabic numerals, as shown in Figure 5.Sampling time interval T=is set
0.5 millisecond.Voltage minimum threshold L=0.1 millivolts (mV) for setting table tennis ball impact desktop to produce, H=10 millivolts of max-thresholds.
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 coordinate value of table tennis is calculated using the table tennis ball positioning method positioned based on signal strength, in table tennis
Pang ball table is distributed three signal receiving devices, and sender unit is carried on table tennis, and each signal receiving device receives table tennis
The wireless signal that ball is sent, obtains signal strength, is then forwarded to server, and server is received according to signal strength and signal
The position of device calculates the position coordinate value of each sampling instant of table tennis.
A kind of system for the angle for identifying table tennis impact bead table, including obtain pressure sensing data and judge that table tennis is
No impact bead table module, the position module for calculating table tennis impact bead table, the angle module for calculating table tennis impact bead table.
Obtain pressure sensing data and judge table tennis whether impact bead table module：The pressure for being deployed in table tennis desktop passes
Feel equipment and obtain pressure sensing data according to sampling time interval T set in advance, then by pressure sensing data sending to clothes
Business device；In the pressure sensing data for the same sampling instant that server obtains, when having and only a pressure sensing data u expires
During sufficient L≤u≤H, then this sampling instant table tennis ball impact ping-pong table is judged, into the position mould for calculating table tennis impact bead table
Block；Otherwise return obtain pressure sensing data and judge table tennis whether impact bead table module.In the present embodiment, 24 piezoelectricity are thin
Film sensors obtain voltage data according to sampling interval T, are then forwarded to server, and the 24 of certain sampling instant that server obtains
A voltage data according to numbering size order composition row matrix x=(0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0), unit is millivolt.Wherein have and only 3 millivolts of a voltage data meets L≤3≤H, then judge that this is adopted
Sample moment table tennis ball impact ping-pong table, into the position module for calculating table tennis impact bead table.
Calculate the position module of table tennis impact bead table：The corresponding pressure sensor numberings of pressure sensing data u are read, with
The corresponding ball desktop area center of the numbering is the position of table tennis impact bead table；Sat according to ping-pong table in three dimensions
Position in mark system, calculates the position coordinate value of table tennis impact bead table, is denoted as (xu,yu,0)；Into calculating table tennis impact bead
The angle module of table.In the present embodiment, 3 millivolts of corresponding sensor numbers of voltage data are 8, the i.e. position of table tennis impact bead table
It is 8 to put zone number, according to position of each regional center point of ping-pong table in three-dimensional coordinate system, calculates table tennis ball impact
The position coordinate value of ball table is (0.5, -0.7,0).
Calculate the angle module of table tennis impact bead table：Transfer the table tennis position coordinate value (x of previous sampling instantv,yv,
zv)；Angle [alpha]=arcsin (h/f) of table tennis impact bead table is calculated, wherein
H=zv；Return obtain pressure sensing data and judge table tennis whether impact bead table module.In the present embodiment, when transferring previous sampling
The table tennis position coordinate value at quarter is (0.35, -0.8,0.2), is calculated
H=zvAngle [alpha]=arcsin (h/f)=47.7 degree of=0.2, h/f=0.74, then table tennis impact bead table.Return and obtain pressure
Power sensing data and judge table tennis whether impact bead table module.
A kind of method for the angle for identifying table tennis impact bead table is according to the following steps：
Step 1, division ping-pong table region and arrange parameter.
Ball desktop is divided into according to the N number of pressure sensor uniformly disposed on table tennis desktop by N number of region and is numbered, N
It is positive integer, pressure sensor is located at the center in each region, and pressure sensor numbering is consistent with ball desktop area numbering；Establish three
Dimension space coordinate system, origin are ping-pong table center, and x-axis and y-axis composition horizontal plane, z-axis are upward perpendicular to desktop；Setting is adopted
Sample time interval T；The minimum threshold L and max-thresholds H of the pressure sensing data of table tennis ball impact desktop generation are set.This implementation
In example, table tennis desktop uniformly disposes 24 piezoelectric film sensors, i.e. N=24, so that ping-pong table is divided into 24 areas
Domain, piezoelectric film sensor are located at the center in each region, (from left to right, from top to bottom) me is used in each region according to certain order
Primary digital number, as shown in Figure 5.The origin for establishing three-dimensional coordinate system is ping-pong table center, ping-pong table center
Refer to the intersection point of table tennis net central shaft and ping-pong table, x-axis is grown parallel to ping-pong table narrow side, y-axis parallel to ping-pong table
Side, z-axis is upward perpendicular to desktop, as shown in Figure 4.T=0.5 milliseconds of sampling time interval is set.Table tennis ball impact desktop is set
Voltage minimum threshold L=0.1 millivolts (mV) of generation, H=10 millivolts of max-thresholds.
Step 2, the position coordinate value for calculating table tennis.
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 coordinate value of table tennis is calculated using the table tennis ball positioning method positioned based on signal strength, in table tennis
Pang ball table is distributed three signal receiving devices, and sender unit is carried on table tennis, and each signal receiving device receives table tennis
The wireless signal that ball is sent, obtains signal strength, is then forwarded to server, and server is received according to signal strength and signal
The position of device calculates the position coordinate value of each sampling instant of table tennis.
Step 3, obtain pressure sensing data and judge table tennis whether impact bead table.
The N number of pressure sensing device for being deployed in table tennis desktop obtains pressure sensing data according to sampling time interval T, so
Afterwards by pressure sensing data sending to server；Server obtains N number of pressure sensing data, the same sampling that server obtains
In the pressure sensing data at moment, when having and only a pressure sensing data u meets L≤u≤H, then when judging this sampling
Table tennis ball impact ping-pong table is carved, enters step 4；Otherwise return to step 2.In the present embodiment, 24 piezoelectric film sensors are pressed
Voltage data is obtained according to sampling interval T, is then forwarded to server, 24 voltage datas of certain sampling instant that server obtains
According to numbering size order composition row matrix x=(0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0), unit is millivolt.Wherein have and only 3 millivolts of a voltage data meets L≤3≤H, then judge that this sampling instant is rattled
Ball impact ping-pong table, enters step 4.
Step 4, the position for calculating table tennis impact bead table.
The corresponding pressure sensor numberings of pressure sensing data u are read, with the corresponding ball desktop area centre bit of the numbering
It is set to the position of table tennis impact bead table；According to position of the ping-pong table in three-dimensional coordinate system, table tennis ball impact is calculated
The position coordinate value of ball table, is denoted as (xu,yu,0).In the present embodiment, 3 millivolts of corresponding sensor numbers of voltage data are 8, i.e.,
The band of position numbering of table tennis impact bead table is 8, according to each regional center point of ping-pong table in three-dimensional coordinate system
Position, the position coordinate value for calculating table tennis impact bead table is (0.5, -0.7,0).
Step 5, the angle for calculating table tennis impact bead table.
Transfer the table tennis position coordinate value (x of previous sampling instantv,yv,zv)；Calculate table tennis impact bead table
Angle [alpha]=arcsin (h/f), whereinH=zv；Return
Step 2.In the present embodiment, the table tennis position coordinate value for transferring previous moment is (0.35, -0.8,0.2), is calculatedH=zv=0.2, h/f=0.74, then ball impact of rattling
Angle [alpha]=arcsin (h/f)=47.7 degree of ball table.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)
1. a kind of system for the angle for identifying table tennis impact bead table, it is characterised in that including obtaining pressure sensing data and judgement
Table tennis whether impact bead table module, calculate table tennis impact bead table position module, calculate table tennis impact bead table angle
Module.
2. it is according to claim 1 identification table tennis impact bead table angle system, its obtain pressure sensing data and
Judge whether impact bead table module is characterized in that table tennis：The pressure sensing device of table tennis desktop is deployed according to setting in advance
The sampling time interval T put obtains pressure sensing data, then by pressure sensing data sending to server；What server obtained
In the pressure sensing data of same sampling instant, when having and only a pressure sensing data u meets L≤u≤H, wherein L
It is the minimum threshold and max-thresholds of the pressure sensing data that table tennis ball impact desktop set in advance produces with H, then judges this
Sampling instant table tennis ball impact ping-pong table, into the position module for calculating table tennis impact bead table；Otherwise return and obtain pressure
Sensing data and judge table tennis whether impact bead table module.
3. the system of the angle of identification table tennis impact bead table according to claim 1, it calculates table tennis impact bead table
Position module be characterized in that：The corresponding pressure sensor numberings of pressure sensing data u are read, with the corresponding ball table of the numbering
Face regional center position is the position of table tennis impact bead table；According to position of the ping-pong table in three-dimensional coordinate system, meter
The position coordinate value of table tennis impact bead table is calculated, is denoted as (xu,yu,0)；Into the angle module for calculating table tennis impact bead table.
4. the system of the angle of identification table tennis impact bead table according to claim 1, it calculates table tennis impact bead table
Angle module be characterized in that：Transfer the table tennis position coordinate value (x of previous sampling instantv,yv,zv)；Table tennis is calculated to hit
Angle [alpha]=arcsin (h/f) of batting table, whereinH=zv；Return
Return obtain pressure sensing data and judge table tennis whether impact bead table module.
A kind of 5. method for the angle for identifying table tennis impact bead table, it is characterised in that including：
Step 1, division ping-pong table region and arrange parameter；
Step 2, the position coordinate value for calculating table tennis；
Step 3, obtain pressure sensing data and judge table tennis whether impact bead table；
Step 4, the position for calculating table tennis impact bead table；
Step 5, the angle for calculating table tennis impact bead table.
6. the method for the angle of identification table tennis impact bead table according to claim 5, its step 1 are characterized in that：Root
Ball desktop is divided into N number of region according to the N number of pressure sensor uniformly disposed on table tennis desktop and is numbered, N is positive integer, pressure
Force snesor is located at the center in each region, and pressure sensor numbering is consistent with ball desktop area numbering；Establish three dimensional space coordinate
System, origin are ping-pong table center, and x-axis and y-axis composition horizontal plane, z-axis are upward perpendicular to desktop；Sampling time interval is set
T；The minimum threshold L and max-thresholds H of the pressure sensing data of table tennis ball impact desktop generation are set.
7. the method for the angle of identification table tennis impact bead table according to claim 5, its step 2 are characterized in that：Profit
With table tennis location technology and device, position coordinate value of the table tennis in each sampling instant is calculated.
8. the method for the angle of identification table tennis impact bead table according to claim 5, its step 3 are characterized in that：Portion
The N number of pressure sensing device affixed one's name in table tennis desktop obtains pressure sensing data according to sampling time interval T, then passes pressure
Data sending is felt to server；In the pressure sensing data for the same sampling instant that server obtains, when having and only one
When pressure sensing data u meets L≤u≤H, then judge this sampling instant table tennis ball impact ping-pong table, enter step 4；Otherwise
Return to step 2.
9. the method for the angle of identification table tennis impact bead table according to claim 5, its step 4 are characterized in that：Read
The corresponding pressure sensor numberings of pressure power sensing data u, using the corresponding ball desktop area center of the numbering as table tennis
The position of impact bead table；According to position of the ping-pong table in three-dimensional coordinate system, the position of calculating table tennis impact bead table
Coordinate value, is denoted as (xu,yu,0)。
10. the method for the angle of identification table tennis impact bead table according to claim 5, its step 5 are characterized in that：Adjust
Take the table tennis position coordinate value (x of previous sampling instantv,yv,zv)；Calculate angle [alpha]=arcsin of table tennis impact bead table
(h/f), whereinH=zv；Return to step 2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711071510.8A CN107941190A (en) | 2017-11-03 | 2017-11-03 | A kind of system and method for the angle for identifying table tennis impact bead table |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711071510.8A CN107941190A (en) | 2017-11-03 | 2017-11-03 | A kind of system and method for the angle for identifying table tennis impact bead table |
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| CN107941190A true CN107941190A (en) | 2018-04-20 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040142772A1 (en) * | 2003-01-21 | 2004-07-22 | Takeshi Asakura | Ball trajectory measuring apparatus |
| CN201978436U (en) * | 2011-03-17 | 2011-09-21 | 脱景春 | Table tennis drop point training table |
| CN103389738A (en) * | 2013-06-25 | 2013-11-13 | 北京理工大学 | Method and device for table tennis robot to predict table tennis ball trajectory |
| CN103785164A (en) * | 2013-12-11 | 2014-05-14 | 北京晨鑫意科技有限公司 | Electronic chessboard |
| CN206063708U (en) * | 2016-06-30 | 2017-04-05 | 江苏经贸职业技术学院 | A kind of tennis drop point trainer |
| JP2017086850A (en) * | 2015-11-04 | 2017-05-25 | セイコーエプソン株式会社 | Electronic apparatus, system, method, program, and recording medium |
-
2017
- 2017-11-03 CN CN201711071510.8A patent/CN107941190A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040142772A1 (en) * | 2003-01-21 | 2004-07-22 | Takeshi Asakura | Ball trajectory measuring apparatus |
| CN201978436U (en) * | 2011-03-17 | 2011-09-21 | 脱景春 | Table tennis drop point training table |
| CN103389738A (en) * | 2013-06-25 | 2013-11-13 | 北京理工大学 | Method and device for table tennis robot to predict table tennis ball trajectory |
| CN103785164A (en) * | 2013-12-11 | 2014-05-14 | 北京晨鑫意科技有限公司 | Electronic chessboard |
| JP2017086850A (en) * | 2015-11-04 | 2017-05-25 | セイコーエプソン株式会社 | Electronic apparatus, system, method, program, and recording medium |
| CN206063708U (en) * | 2016-06-30 | 2017-04-05 | 江苏经贸职业技术学院 | A kind of tennis drop point trainer |
Non-Patent Citations (1)
| Title |
|---|
| 李小亭等: "《长度计量 新编计量技术初级教材第2版》", 31 October 2006 * |
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Application publication date: 20180420 |
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