CN209316978U - The self-service Intelligent scoring system of table tennis - Google Patents
The self-service Intelligent scoring system of table tennis Download PDFInfo
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- CN209316978U CN209316978U CN201821784390.6U CN201821784390U CN209316978U CN 209316978 U CN209316978 U CN 209316978U CN 201821784390 U CN201821784390 U CN 201821784390U CN 209316978 U CN209316978 U CN 209316978U
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Abstract
The utility model relates to a kind of self-service Intelligent scoring system of table tennis, the acquisition of the system and display subsystem include acquisition device and the display device with acquisition device wireless connection；Acquisition device includes the first controller, the first wireless transport module, infrared ray transceiving modules A and infrared ray transceiving module B, and the first wireless transport module, infrared ray transceiving modules A and infrared ray transceiving module B are connect with the first controller respectively；Display device includes second controller, display module and the second wireless transport module, display module and the second wireless transport module are connect with second controller respectively, and second controller is communicated by the second wireless transport module and the first wireless transport module with the first controller.The self-service Intelligent scoring system of the table tennis that the utility model is proposed can be used for the real-time display and statistics to ping-pong contest result, and when scoring, entrant or judge need to only be blocked near acquisition device with hand, can realize automatic score.
Description
Technical field
The utility model relates to body-building apparatus technical fields, more particularly to a kind of self-service Intelligent scoring system of table tennis.
Background technique
Table tennis is internationally recognized sports items, basic laws of the game are as follows: both sides entrant stands on ball table respectively
Two sides determine first run serving side by the modes such as draw lots before match, and then alternation allows other side's tieback.During playing ball,
If there is a side to fail to hit ball into back other side's desktop, it is considered as and fumbles, other side gets a point.It competes and generally uses seven innings of four victory, every innings
11 points of Seeds per siliques first obtain 11 points of a side and win.If both sides' score is 10:10, needs one party to overpower the opponent 2 points and just calculate
It wins victory.
The game-scoring of table tennis is all to be recorded display by judging with visually observing, then by result at present.But the party
Method needs manpower more, and only loses fairness with artificial judgement, especially in the usual sparetime practices, often lacks sanction
Sentence ruling, record of only voluntarily giving a mark with entrant not only diverts attention but also easily causes the unfavorable condition that subjective judgement is disputed on, very not
Just.
Utility model content
Based on this, it is necessary to aiming at the problems existing in the prior art, provide a kind of self-service Intelligent scoring system of table tennis.
To solve the above problems, the utility model takes the following technical solution:
A kind of self-service Intelligent scoring system of table tennis, including two sets of identical acquisitions and display subsystem, it is described acquisition and
Display subsystem includes acquisition device and the display device with acquisition device wireless connection；
The acquisition device includes the first controller and the first wireless transport module, further includes for detecting shelter movement
The infrared ray transceiving modules A and infrared ray transceiving module B in direction, and first wireless transport module, the infrared ray transceiving
Modules A and the infrared ray transceiving module B are connect with first controller respectively；
The display device includes second controller, display module and the second wireless transport module, the display module and
Second wireless transport module is connect with the second controller respectively, and the second controller is wireless by described second
Transmission module and first wireless transport module are communicated with first controller；
When the direction of motion of the shelter is from the infrared ray transceiving modules A to the infrared ray transceiving module B,
The infrared ray transceiving modules A and the infrared ray transceiving module B successively send bonus point signal to first controller, described
The bonus point signal is sent to the second controller by the first controller, and the second controller drives according to the bonus point signal
The display module is moved, so that the display module is done plus one point of display；When the direction of motion of the shelter is from described red
When outside line transceiver module B is to the infrared ray transceiving modules A, the infrared ray transceiving module B and the infrared ray transceiving modules A
Deduction signal successively is sent to first controller, the deduction signal is sent to second control by first controller
Device processed, the second controller drive the display module, show so that the display module does minus fifteen.
The self-service Intelligent scoring system of the table tennis that the utility model is proposed can be used for the real-time of ping-pong contest result
Display and statistics, when scoring, entrant or judge need to only be blocked near acquisition device with hand, can be realized automatic
Score.Compared with prior art, the utility model has the following beneficial effects:
(1) scoring system not only has the function of automatic bonus point, can also be when accidentally missing bonus point number, by reversely grasping
Make timely deduction playback, so that game-scoring is more convenient, accurate；
(2) it between acquisition device and display device by the way of wireless transmission, avoids when being connected with conducting wire, needs sometimes
The too long wiring bring wasting of resources and the risk for being tripped or being hindered by line；
(3) the automatic score function of passing through this scoring system, can make entrant that need not divert attention and count goals, pay attention to
Power is fully immersed in movement, greatly improves fortune sport efficiency, also makes the convenient record scores of staff such as judge, and see
The masses to watch the match can understand situation in real time, facilitate masses.
Detailed description of the invention
Fig. 1 is the usage state diagram of the self-service Intelligent scoring system of the utility model table tennis；
Fig. 2 is the structural schematic diagram of the self-service Intelligent scoring system of the utility model table tennis；
Fig. 3 is the structural schematic diagram of the first controller in the self-service Intelligent scoring system of the utility model table tennis；
Fig. 4 is the structural schematic diagram of second controller in the self-service Intelligent scoring system of the utility model table tennis；
Fig. 5 is the structural schematic diagram of display module in the self-service Intelligent scoring system of the utility model table tennis；
Fig. 6 is infrared ray transceiving modules A and infrared ray transceiving mould in the self-service Intelligent scoring system of the utility model table tennis
The schematic diagram of block B detection shelter；
Fig. 7 is the work flow diagram of the self-service Intelligent scoring system of the utility model table tennis.
Specific embodiment
The self-service Intelligent scoring system of the table tennis that the utility model is proposed include two nested structures it is identical acquisition and
Display subsystem, two sets of acquisitions and display subsystem can be placed in the two sides of table tennis table 5, as shown in Figure 1, to facilitate ginseng
Match person carries out self-service score in training usually or during the games.In regulation game, two sets of acquisitions and display subsystem
System can be transferred to be scored in judge's hand by judge.When the one party of competition is scored, entrant or judge need to only use hand
Or other opaque articles block above the acquisition device in acquisition and display subsystem, can realize correspondence
The automatic bonus point of goal side, and can be playbacked by the timely deduction of reverse operating in accidentally maloperation bonus point, so that match
It is more convenient, accurate to score, meanwhile, which can show this competition result and the whole match situation together, very convenient.
The technical solution of the utility model is described in detail below in conjunction with attached drawing and preferred embodiment.
In one of the embodiments, as shown in Figure 1, a kind of self-service Intelligent scoring system of table tennis, including two sets identical
Acquisition and display subsystem, each acquisition and display subsystem include acquisition device 1 and display device 2, and acquire dress
It sets and is wirelessly connected between 1 and display device 2.Acquisition and display subsystem are mainly by 2 two parts of acquisition device 1 and display device
Composition contains controller in acquisition device 1 and display device 2, includes single-chip microcontroller and its corresponding control circuit in controller,
And switching circuit etc.；It is connected between two single-chip microcontrollers by wireless transport module.Two sets of acquisitions and display subsystem in the present embodiment
The two sides of table tennis table 5 discrete can be arranged in system, and the ipsilateral of table tennis table 5, while the present embodiment can also be arranged in simultaneously
Not in two sets of acquisitions and display subsystem acquisition device 1 and display device 2 limit relative to the position of table tennis table 5
It is fixed, those skilled in the art can according to actual needs appropriate adjustment acquisition device 1 and display device 2 relative to table tennis table 5
Position.
Specifically, in the present embodiment, as shown in Fig. 2, it includes the first controller 1-1 and first wireless that acquisition device 1, which removes,
It further include infrared ray transceiving modules A 1-3 and infrared ray transceiving module B 1-4, infrared ray transceiving module except transmission module 1-2
A 1-3 and infrared ray transceiving module B 1-4 is used to detect the direction of motion of shelter 3, and the first wireless transport module 1-2,
Infrared ray transceiving modules A 1-3 and infrared ray transceiving module B 1-4 are connect with the first controller 1-1 respectively.
Further, in this embodiment the first controller 1-1 include first singlechip 1-1-1, crystal oscillating circuit 1-1-2,
Mode setting circuit 1-1-3, reset circuit 1-1-4, download circuit 1-1-5, the first filter circuit 1-1-6, first switch circuit
1-1-7, the first low dropout voltage regulator A 1-1-8, the first low dropout voltage regulator B 1-1-9 and the first power circuit 1-1-
10, and crystal oscillating circuit 1-1-2, mode setting circuit 1-1-3, reset circuit 1-1-4, download circuit 1-1-5, the first filtered electrical
Road 1-1-6, first switch circuit 1-1-7, the first low dropout voltage regulator A 1-1-8, the first low dropout voltage regulator B 1-1-9
It is connect respectively with first singlechip 1-1-1 with the first power circuit 1-1-10, wherein crystal oscillating circuit 1-1-2 is used for single for first
Piece machine 1-1-1 provides clock；Mode setting circuit 1-1-3 is for being arranged first singlechip 1-1-1 program start-up mode；Reset electricity
Road 1-1-4 is for resetting first singlechip 1-1-1；Download circuit 1-1-5 is used for as first singlechip 1-1-1 downloading control journey
Sequence；Power supply supplies the first low dropout voltage regulator A 1-1- through the first power circuit 1-1-10, first switch circuit 1-1-7
Voltage is dropped to 5V from 12V by 8, the first low dropout voltage regulator A 1-1-8, then will by the first low dropout voltage regulator B 1-1-9
Voltage drops to 3.3V from 5V, then required stable by providing after the first filter circuit 1-1-6 shaping for entire controller system
Power supply.When counting the scoring event at display device 2 after end of match, it can be closed and be acquired by first switch circuit 1-1-7
Device 1 saves electric energy so that avoiding powering on rear acquisition device 1 is constantly in working condition.Preferably, in present embodiment
First singlechip 1-1-1 uses STM32 series monolithic.
As shown in Fig. 2, display device 2 includes second controller 2-1, display module 2-2 and the second wireless transport module 2-
3, display module 2-2 and the second wireless transport module 2-3 are connect with second controller 2-1 respectively, and second controller 2-1 is logical
It crosses the second wireless transport module 2-3 and the first wireless transport module 1-2 is communicated with the first controller 1-1.
Further, in this embodiment second controller 2-1 include second singlechip 2-1-1, the second filter circuit 2-
1-2, second switch circuit 2-1-3, the second low dropout voltage regulator 2-1-4 and second source circuit 2-1-5, and the second filtering
Circuit 2-1-2, second switch circuit 2-1-3, the second low dropout voltage regulator 2-1-4 and second source circuit 2-1-5 respectively with
Second singlechip 2-1-1 connection.Power supply supplies the second low pressure through second source circuit 2-1-5, second switch circuit 2-1-3
Poor voltage regulator circuit 2-1-4, then by providing required stable electricity for entire controller system after the second filter circuit 2-1-2 shaping
Source.Display device 2 can be closed as needed at any time by second switch circuit 2-1-3, to avoid powering on rear indicator 2 one
It is straight in running order, save electric energy.Preferably, second singlechip 2-1-1 is STC series monolithic.
Infrared ray transceiving modules A 1-3 and infrared ray transceiving module B 1-4 have certain distance to each other, when shelter 3
The direction of motion be from infrared ray transceiving modules A 1-3 to infrared ray transceiving module B 1-4 when, infrared ray transceiving modules A 1-3 and
Infrared ray transceiving module B 1-4 sends bonus point signal to the first controller 1-1, and bonus point signal is sent to by the first controller 1-1
Second controller 2-1, second controller 2-1 pass through display driver drives display module 2-2 according to bonus point signal, so that display
Module 2-2 is done plus one point of display；When the direction of motion of shelter 3 is from infrared ray transceiving module B 1-4 to infrared ray transceiving mould
When block A 1-3, infrared ray transceiving module B 1-4 and infrared ray transceiving modules A 1-3 successively send deduction to the first controller 1-1
Deduction signal is sent to second controller 2-1 by signal, the first controller 1-1, and second controller 2-1 is driven by display driver
Dynamic display module 2-2, shows so that display module 2-2 does minus fifteen.
After the self-service Intelligent scoring system of table tennis powers on, turning on the switch, display device 2 is not any change when not in use, when
When acquisition device 1 receives signal because being blocked, display device 2 changes, and starts to score, and can be according to being blocked
When, the sequencing that signal is received in acquisition device 1 comes automatic bonus point or deduction.Display device 2 is in addition to showing each innings of ratio
Player fights each other outside scoring event in match, can also show the RealTime scores situation of the whole match.
The self-service Intelligent scoring system of the table tennis that the present embodiment is proposed has two infrared ray transceiving modules, when two it is red
When outside line transceiver module receives infrared external reflection light because being blocked, display device automatic score can be controlled, it is infrared by two
Line transceiver module receives the sequencing of light for score correspondingly plus or minus one, indicates to score or accidentally by moving back point, and then for
Playing conditions gives real-time monitoring and record, display present score result and whole result of the match.It, can be with by automatic score
Player or judge is set to spare oneself the trouble and record goals or turn over scoreboard, attention is fully immersed in match, improves ginseng
The match efficiency of match personnel.Meanwhile it being avoided by the way of wireless transmission with conducting wire phase between acquisition device and display device
Lian Shi, the risk for needing the too long wiring bring wasting of resources sometimes and being tripped or hindered by line.
For the cost for further decreasing the self-service Intelligent scoring system of table tennis, simplify structure, the display mould in display device 2
Digital tube display module can be used in block 2-2.Further, as shown in figure 5, digital tube display module 2-2 includes first digital
Pipe display sub-module 2-2-1 and the second numeral method submodule 2-2-2, the first numeral method submodule 2-2-1 are located at the
The top of two numeral method submodule 2-2-2, the first numeral method submodule 2-2-1 are made of two charactrons, and second
Numeral method submodule 2-2-2 is made of four charactrons, wherein the first numeral method submodule 2-2-1 is whole for showing
Field match score situation, the second numeral method submodule 2-2-2 are then used to show every innings of match score situation.
As a kind of specific embodiment, as shown in fig. 6, infrared ray transceiving modules A 1-3 includes RF transmitter A
1-3-1 and infrared receiver A 1-3-2, infrared ray transceiving module B 1-4 include RF transmitter B 1-4-1 and infrared ray
Receiver B 1-4-2, wherein RF transmitter A 1-3-1, infrared receiver A 1-3-2, RF transmitter B 1-4-1
It can be located on same substrate 4 with infrared receiver B 1-4-2, RF transmitter A 1-3-1 and RF transmitter B
1-4-1 is conllinear, and infrared receiver A 1-3-2 is conllinear with infrared receiver B 1-4-2.RF transmitter A 1-3-1 and
RF transmitter B 1-4-1 emits upward infrared light, when shelter 3 block it is attached above RF transmitter A 1-3-1
When close, infrared light will be reflected on corresponding infrared receiver A 1-3-2, as shown in the position 1 of shelter 3 in Fig. 6；When
When shelter 3 is blocked above RF transmitter B 1-4-1 nearby, infrared light will be reflected onto corresponding infrared receiver B
On 1-4-2, as shown in the position 2 of shelter 3 in Fig. 6.
Present embodiment is described in detail below with reference to Fig. 7.System electrification, after starting starting, the first controller 1-1
In first singlechip 1-1-1 (such as STM32 series monolithic) give RF transmitter A 1-3-1 and RF transmitter B 1-
4-1 inputs a square-wave signal respectively, and diode current flow is allowed to shine, infrared when 1 top of acquisition device does not nearby have shelter 3
The infrared light that line transmitter A 1-3-1 and RF transmitter B 1-4-1 are issued is projected towards a direction straight, and infrared ray connects
It receives device A 1-3-2 and infrared receiver B 1-4-2 and does not receive infrared light, acquisition device 1 can not acquire data at this time；And work as
When having shelter 3 to appear in above RF transmitter A 1-3-1 nearby, RF transmitter A 1-3-1 emits red
Outer light a part object 3 that is blocked is reflected at infrared receiver A 1-3-2, can be produced at infrared receiver A 1-3-2 at this time
Raw small negative-phase sequence curent is converted to after triode and the amplification of SGM8051 operational amplifier amplifying circuit two-stage, then through A/D
Digital circuit is into first singlechip 1-1-1, the acquisition of complete pair signals, then sends out signal through the first wireless transport module 1-2
Give display device 2；Similarly, when there is shelter 3 to appear in above RF transmitter B 1-4-1 nearby, infrared ray hair
Infrared light a part that emitter B 1-4-1 is emitted object 3 that is blocked is reflected at infrared receiver B 1-4-2, red at this time
Small negative-phase sequence curent can be generated at outer line receiver B 1-4-2, through triode and SGM8051 operational amplifier amplifying circuit two
After grade amplification, then through A/D digital circuit is converted into first singlechip 1-1-1, the acquisition of complete pair signals, then through the first nothing
Line transmission module 1-2 sends a signal to display device 2.
According to the receiving time of infrared receiver A 1-3-2 and infrared receiver B 1-4-2 sequence, when judging to receive
Whether by infrared receiver A 1-3-2 to infrared receiver B 1-4-2, that is, judge shelter 3 the direction of motion whether by
Infrared ray transceiving modules A 1-3 to infrared ray transceiving module B 1-4, if so, by generating negative-phase sequence curent, two-stage amplification, A/D
After conversion, bonus point signal is sent to by second controller 2-1 by wireless transmission method, second controller 2-1 believes according to bonus point
Number driving display device 2 in display module 2-2 do plus one point display；If it is not, then amplify by generation negative-phase sequence curent, two-stage,
After A/D conversion, deduction signal is sent to by second controller 2-1 by wireless transmission method, second controller 2-1 is according to deduction
Display module 2-2 in signal driving display device 2 does minus fifteen and shows.It, can be according to result of the match after bout
It is automatic to calculate victory or defeat situation, then done on the digital tube panel of the whole match and add 1 display.Pass through table tennis autonomous intelligence scoring system
Automatic score function, can make entrant that need not divert attention and count goals, attention is fully immersed in movement, greatly
Fortune sport efficiency is improved, also makes the convenient record scores of staff such as judge, and the masses to come to matches that can understand situation in real time,
Facilitate masses.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of self-service Intelligent scoring system of table tennis, which is characterized in that including two sets of identical acquisitions and display subsystem, institute
It states acquisition and display subsystem includes acquisition device (1) and the display device (2) with the acquisition device (1) wireless connection；
The acquisition device (1) includes the first controller (1-1) and the first wireless transport module (1-2), further includes for detecting
The infrared ray transceiving modules A (1-3) and infrared ray transceiving module B (1-4) of shelter (3) direction of motion, and described first is wireless
Transmission module (1-2), the infrared ray transceiving modules A (1-3) and the infrared ray transceiving module B (1-4) are respectively with described
One controller (1-1) connection；
The display device (2) includes second controller (2-1), display module (2-2) and the second wireless transport module (2-3),
The display module (2-2) and second wireless transport module (2-3) are connect with the second controller (2-1) respectively, and
The second controller (2-1) by second wireless transport module (2-3) and first wireless transport module (1-2) and
First controller (1-1) communication；
When the direction of motion of the shelter (3) is from the infrared ray transceiving modules A (1-3) to the infrared ray transceiving module
When B (1-4), the infrared ray transceiving modules A (1-3) and the infrared ray transceiving module B (1-4) are successively to first control
Device (1-1) sends bonus point signal, and the bonus point signal is sent to the second controller (2- by first controller (1-1)
1), the second controller (2-1) drives the display module (2-2) according to the bonus point signal, so that the display module
(2-2) is done plus one point of display；When the direction of motion of the shelter (3) is extremely described from the infrared ray transceiving module B (1-4)
When infrared ray transceiving modules A (1-3), the infrared ray transceiving module B (1-4) and the infrared ray transceiving modules A (1-3) are successively
Deduction signal is sent to the first controller (1-1), the deduction signal is sent to described second by first controller (1-1)
Controller (2-1), the second controller (2-1) drives the display module (2-2), so that the display module (2-2) is done
Minus fifteen is shown.
2. the self-service Intelligent scoring system of table tennis according to claim 1, which is characterized in that the first controller (1-
1) include first singlechip (1-1-1), crystal oscillating circuit (1-1-2), mode setting circuit (1-1-3), reset circuit (1-1-4),
Download circuit (1-1-5), the first filter circuit (1-1-6), first switch circuit (1-1-7), the first low dropout voltage regulator A
(1-1-8), the first low dropout voltage regulator B (1-1-9) and the first power circuit (1-1-10)；
The crystal oscillating circuit (1-1-2), the mode setting circuit (1-1-3), the reset circuit (1-1-4), the downloading
Circuit (1-1-5), first filter circuit (1-1-6), the first switch circuit (1-1-7), first low voltage difference are steady
Volt circuit A (1-1-8), the first low dropout voltage regulator B (1-1-9) and first power circuit (1-1-10) respectively with it is described
First singlechip (1-1-1) connection.
3. the self-service Intelligent scoring system of table tennis according to claim 2, which is characterized in that
The first singlechip (1-1-1) is STM32 series monolithic.
4. the self-service Intelligent scoring system of table tennis according to claim 1 or 2, which is characterized in that the second controller
(2-1) includes second singlechip (2-1-1), the second filter circuit (2-1-2), second switch circuit (2-1-3), the second low voltage difference
Voltage regulator circuit (2-1-4) and second source circuit (2-1-5)；
Second filter circuit (2-1-2), the second switch circuit (2-1-3), the second low dropout voltage regulator (2-
1-4) it is connect respectively with the second singlechip (2-1-1) with the second source circuit (2-1-5).
5. the self-service Intelligent scoring system of table tennis according to claim 4, which is characterized in that
The second singlechip (2-1-1) is STC series monolithic.
6. the self-service Intelligent scoring system of table tennis according to claim 1 or 2, which is characterized in that
The display module (2-2) is digital tube display module.
7. the self-service Intelligent scoring system of table tennis according to claim 6, which is characterized in that
The digital tube display module includes the first numeral method submodule (2-2- for showing the whole match score situation
1) and for show every innings match score situation the second numeral method submodule (2-2-2).
8. the self-service Intelligent scoring system of table tennis according to claim 1 or 2, which is characterized in that
The infrared ray transceiving modules A (1-3) includes RF transmitter A (1-3-1) and reception shelter (3) reflection institute
State the infrared receiver A (1-3-2) of the infrared light of RF transmitter A (1-3-1) transmitting；
The infrared ray transceiving module B (1-4) includes RF transmitter B (1-4-1) and reception shelter (3) reflection institute
State the infrared receiver B (1-4-2) of the infrared light of RF transmitter B (1-4-1) transmitting.
9. the self-service Intelligent scoring system of table tennis according to claim 8, which is characterized in that
The RF transmitter A (1-3-1), the infrared receiver A (1-3-2), the RF transmitter B (1-4-
1) it is located on same substrate (4) with the infrared receiver B (1-4-2), and the RF transmitter A (1-3-1) and institute
State RF transmitter B (1-4-1) collinearly, the infrared receiver A (1-3-2) and the infrared receiver B (1-4-2)
Collinearly.
10. the self-service Intelligent scoring system of table tennis according to claim 1 or 2, which is characterized in that
Two sets it is described acquisition and display subsystem it is discrete setting table tennis table (5) two sides.
Priority Applications (1)
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|---|---|---|---|
| CN201821784390.6U CN209316978U (en) | 2018-10-31 | 2018-10-31 | The self-service Intelligent scoring system of table tennis |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821784390.6U CN209316978U (en) | 2018-10-31 | 2018-10-31 | The self-service Intelligent scoring system of table tennis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109091849A (en) * | 2018-10-31 | 2018-12-28 | 吉林省动活科技有限公司 | The self-service Intelligent scoring system of table tennis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109091849A (en) * | 2018-10-31 | 2018-12-28 | 吉林省动活科技有限公司 | The self-service Intelligent scoring system of table tennis |
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Granted publication date: 20190830 |