CN204121698U

CN204121698U - Mutual table tennis table

Info

Publication number: CN204121698U
Application number: CN201420468593.XU
Authority: CN
Inventors: 刘源
Original assignee: Nanjing You Chu Electronic Science And Technology Co Ltd
Current assignee: Nanjing You Chu Electronic Science And Technology Co Ltd
Priority date: 2014-08-15
Filing date: 2014-08-15
Publication date: 2015-01-28
Anticipated expiration: 2024-08-15

Abstract

The utility model relates to a kind of man-machine interface that can be mutual with paddler, and table tennis especially can be indicated to drop on the mutual table tennis table of the information such as speed, direction, dynamics on table top.This billiard table has a glass table top and a wooden table top, and glass table top is stained with piezoceramic transducer, and the vibration wave produced when can collide according to table tennis and table top is derived point of impingement information.The utility model can help sportsman and coach understand sportsman bat custom thus improve sports achievement.

Description

Mutual table tennis table

Technical field

The utility model relates to a kind of man-machine interface that can be mutual with paddler, and table tennis especially can be indicated to drop on the table tennis table of the information such as speed, direction, dynamics on table top.

Background technology

At present, known table tennis table comprises net, net post, support three parts.Table top can be made by any material, has certain elasticity, and upper surface, playing surface, grows 2.74 meters, wide 1.525 meters, overhead 76 centimetres is dark-coloured or matt with plane-parallel table top, edge of table respectively has 2 centimetres of wide white lines, long title sideline, short title end line.There are the white line of 3 mm wides in table top central authorities, claim center line, Liang Getai district are respectively divided into two parts in left and right.But current table tennis table can only be collided by table tennis by passive supporting bable tops, does not have interactive function, the guide on sportsman or coach's ball placement and table tennis track cannot be supplied to, also cannot provide better interactive experience.

Summary of the invention

Impact information is provided to guide in order to give paddler and coach, thus can the movable information such as batting attitude, dynamics of correction motion person, the utility model provides a kind of mutual table tennis table, this table tennis table well can not only complete the function that billiard table supports, simultaneously can provide the drop point information of table tennis on billiard table, and be delivered on computer by bluetooth and realize information visuallization.

According to the data announced, as WO 9611378 (A1), WO 0038104 (A1), and WO2004055661 (A1), there is a kind of ultrasonic wave produced in a flat board according to click or collision to calculate, the touch technology of derivation (x, y) coordinate value.This type of technology is applied on glass or metal material usually, has four pairs of ultrasonic transducers, and is usually optimized the mechanical mechanism at interface, improves signal to noise ratio, thus collects the signal that the sound wave clicking generation arrives the generation of different transducer.This type of technology often has corresponding algorithm, and the time difference that the vibration wave (ultrasonic wave) that can produce according to touching reaches different transducer group calculates derivation positional information.This type of technology can support the Design and manufacture of the interactive interface of nearly several square metres.

Namely the contact of table tennis table and table tennis is that the click of standard is collided, thus can measure according to the physical property of this collision to the drop point of table tennis, and described physical property comprises the direction of rotation etc. of the position of click, dynamics, direction and even table tennis.

The utility model solves the technical scheme that its technical problem adopts: table tennis table table top is that boundary is divided into two parts with center line, and a part is common solid wood materials elasticity table top, and a part is safety glass table top.Thick 4 centimetres of glass table top, the back side is pasted with the piezoceramic transducer of the mechanical elasticity ripple that Receiving collision produces, and sensor with digital to analog converter and Bluetooth communication modules, and is connected by paired cable.Piezoceramic transducer has four groups, is placed on four summits of table tennis table table top entirety respectively.When sportsman's batting collide with table top, four groups of piezoceramic transducers receive the vibration wave from the point of impingement, produce the signal of telecommunication, according to the time difference of signal of telecommunication generation, extrapolate table tennis drop point position.The average signal amplitude of the signal of telecommunication obtained by four groups of piezoceramic transducers, extrapolates dynamics when table tennis is fallen on table top.Phase difference between the signal of telecommunication obtained by four groups of piezoceramic transducers, is extrapolated table tennis and falls rotary speed when table top collides and direction.

All calculating, is modulated to discrete signal after being completed by custom circuit plate by analog computation, is passed to computer or other external fetch equipment afterwards by bluetooth sensor.

The beneficial effects of the utility model are, while paddler normally trains, can obtain the dynamics of its batting easily, the information such as direction of rotation, thus propose to guide for improving sports achievement, and part of receiving adopts conventional wooden table top, do not affect it normally to train, structure is simple.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is the structural map of mutual table tennis table first embodiment.

Fig. 2 is schematic diagram of the present utility model.

detailed description of the invention

The wooden countertop segment of 1. billiard table in figure, 2. piezoceramic transducer N1,3. piezoceramic transducer B2,4. piezoceramic transducer R3,5. glass table top part.

In figure, 20. is mutual table top, and 21. is signal processing module, and 22. is computer.

In the embodiment shown in fig. 1, billiard table is divided into wooden table top (1) and glass table top (5) two regions by center line, player stands stands on the batting of wooden table top (1) direction glass table top (5), and coach or training mate can be batted by glass table top (5) direction wooden table top (1) side or serve a ball to sportsman.Table tennis and glass table top (5) collision rift, its elastic vibration ripple produced, is received respectively by piezoceramic transducer (2) etc. and is produced the signal of telecommunication, and delivering to processing module process subsequently.

See Fig. 2, a mutual table top and the table top shown in Fig. 1 (1) and table top (5), at its edge by pasting attachment four groups of piezoceramic transducers, be numbered N1, B2, R3 respectively, and J4.The orientation of four groups of sensors forms four summits of interworking area, and forms a rectangular mutual area.In this area, the vibration wave of the click touching that (xr, yr) place occurs, arrive the time t1 of different transducer group, t2, t3, t4 is recorded and delivers to process chip MC (21) place, is calculated can obtain ball placement positional information (xr, yr) by geometry.It should be noted that, the ultrasonic wave that the utility model is mentioned is the mechanical elasticity ripple that touching produces, this vibration wave is in solid interior transmission, what needs further illustrated is, namely this hyperacoustic transmission speed is vibrated wave frequency primarily of the material of flat board and is determined and be certain value, if dull and stereotyped material is glass, detect after filtering for vibration wave be 100kHz time, according to technical manual, ultrasonic wave transmission speed is 3300m/s.Namely between t1, t2, t3, t4, relation is only determined by the distance of touch points to transducer geometric center.Can to derive positional information according to three range informations in theory, the use of the utility model four groups of transducers, except increasing by one group of surplus, also can maintain dull and stereotyped geometrical symmetry, thus maintains the uniformity of accuracy of detection.The overall dimensions non-tablet size of mutual billiard table, but plate center parallel surface, its dimension mark is (X, Y), its center 0 i.e. rectangle center for this reason.

Bluetooth module is labeled as H1, is pasted onto on table top equally, has rectangle or circular dimension, and together with four groups of piezoceramic transducers, is connected with signal processing module MC (21) by paired cable.

MC inside comprises a signal filtering amplifying circuit.Namely the peak value of the ultrasonic signal produced when clicking touching generally carries out filtering at about 100kHz, MC (21) near 100kHz, thus obtains the time difference of ultrasonic wave arrival.Simultaneously, MC processing module (21) provides filtering in low-frequency range, thus the environment voice signal that these four groups of transducers can be made simultaneously to detect gathers on average, calculates collision dynamics size.

Phase difference between the signal of telecommunication obtained by four groups of piezoceramic transducers, is extrapolated table tennis and falls rotary speed when table top collides and direction.

Processing module MC (21) itself is connected to computer by data wire or other have module (22) place of more powerful computing function.22 can be computer, there is software and can calculate (xr according to the derivation of the ultrasonic wave difference time of advent, yr) position, dynamics, it also projects on Virtual Space or computer screen by the information such as rotary speed, the pixel size of the size (X, Y) realizing interactive interface and computer screen is the interactive function such as relation one to one.

Claims

1. a mutual table tennis table, its table top is that boundary is divided into two with center line, wooden table top and glass table top respectively, it is characterized in that: billiard table is pasted with four groups of piezoceramic transducers, the elastic vibration ripple produced when monitoring table tennis and glass table top collide respectively, and calculate the drop point information of collision thus.

2. mutual table tennis table according to claim 1, during its feature: described drop point information comprises the position that table tennis and glass table top collide, the direction of rotation of table tennis when the dynamics of collision and collision.

3. mutual table tennis table according to claim 1, is characterized in that: piezoceramic transducer is connected with data processing module by bluetooth and paired cable; Four groups of piezoceramic transducers receive the vibration wave from the point of impingement, produce the signal of telecommunication, according to the time difference that the signal of telecommunication produces, extrapolate table tennis drop point position; The average signal amplitude of the signal of telecommunication obtained by four groups of piezoceramic transducers, extrapolates dynamics when table tennis is fallen on table top; Phase difference between the signal of telecommunication obtained by four groups of piezoceramic transducers, is extrapolated table tennis and falls rotary speed when table top collides and direction.