A system for illustrating the flight of a sports ball includes a radar, an imager, and a controller. The in is configured to image a moving sports ball. The controller is configured to (i) receive, from the imager, an image including the moving sports ball, (ii) receive, from the radar, radar data associated with the moving sports ball, (iii) determine, from the radar data, a portion of a trajectory of the moving sports ball, (iv) alter the image to illustrate the portion of the trajectory relative to the moving sports ball, and (v) output the altered image.

[Object] To analyze a contact phenomenon between objects can with a simpler configuration.

[Solution] Provided is an analysis apparatus including: an acquisition unit configured to acquire vibration data showing a vibration generated in a first object by having a second object come into contact with a first position on the first object; a first analysis processing unit configured to specify the first position by comparing a vibration characteristic shown by the vibration data, and a vibration characteristic defined for each position where the second object may come into contact with the first object; and a second analysis processing unit configured to estimate a velocity after the contact of the second object based on a velocity of the first object and the first position.

Disclosed is a method for providing sports training videos using a camera and a radar sensor. The present invention is configured so that, when a specific motion of a player is captured by means of radar sensors in a state where a player is being simultaneously captured in real time from various directions by means of one or more cameras during a game or training, only videos of an interval corresponding to the detected specific motion of the player are saved, thus making it possible to: analyze problems that the player has in the game or training through replays of the saved videos; correct problems that the player has during training on the basis of the results of the analysis by distinguishing between the player's incorrect posture and the posture suitable for the player's physical requirements, the player's posture during slumps and during good periods, etc.; correct the player's posture through comparison with the postures of good players and the maximization of the strengths of the player; prevent injuries caused by the player's incorrect posture; and improve skills through the minimization of the player's weaknesses.

A substantially spherical hollow body, having a diameter of from 37 mm to 45 mm, in particular a diameter of 39.7 mm to 40.75 mm, and a weight of from 2.5 g to 3.5 g, in particular a weight of 2.6 g to 2.85 g, comprising a shell and an inner hollow space, wherein the shell has a wall thickness of 0.2 mm to 1.3 mm, in particular 0.3 mm to 0.8 mm, characterized in that the shell is free of celluloid and comprises at least one styrene-containing copolymer.

A table tennis ball faithfully reproduces the playing characteristics of celluloid table tennis balls without using celluloid, and a thermoplastic resin composition for table tennis balls provides a table tennis ball having an excellent balance of elastic modulus, impact resistance, and density. The table tennis ball is composed of a celluloid-free thermoplastic resin or thermoplastic resin composition having a flexural modulus according to ISO 178 of 1650 MPa or more, a Charpy impact strength according to ISO 179 of 20 kJ/m.sup.2 or more, and a density according to ISO 1183 of less than 1.20 g/cm.sup.3, has a diameter of 39.0 mm or more, and weighs 2.0 to 3.5 g.

A ball holder for a table tennis table designed for non-intrusive mounting under a corner of a table tennis table. The ball holder can be manufactured in two parts for ease of sale and construction, with the two halves being easily assembled and secured by the user. The two halves can connect using a set of male and female tabs, and secure using a set of bolts. The full assembly can attach to the table tennis table through the use of four screws. Properly assembled, the ball holder can contain multiple table tennis balls in an easily accessible position, but without obstructing the players' range of motion or creating a hazard.

Provided is a sensor device including a sensor configured to output a vibration datum by detecting a change in a state of a vibration in a first object when a second object touches the first object, a holding section configured to hold, at a portion of the first object which is different from a portion where the second object touches, the sensor in a state where the vibration in the first object is transmitted, and a communication section configured to transmit the single vibration datum detected by the sensor to an analyzing device which identifies a touch position where the second object touches the first object by analyzing the vibration datum.

A robot server assembly for serving table tennis balls comprising a body defining an internal ball path, means for introducing balls into the internal ball path at the lower end of the body; a ball guide at the upper end of the back panel, a serving head assembly at the upper end of the body having a ball discharge tube in communication with the ball guide; a pair of opposed discharge wheel operatively associated with the discharge tube; a plurality of gears associated with the serving head; at least one servo motor associated with at least one of the gears to actuate rotation of the gear; whereby actuation of a least one of said gears affects 180 rotation of the serving head about a longitudinal axis of the serving head, up and down movement of the serving head and side to side movement of the serving head.

An athletic equipment with feedback device includes a main body; and a feedback device installed on the main body. The feedback device has a control unit; an input module for entering a target waving value; a sensing module for sensing the waving status of the athletic equipment and producing a sense signal; a signal processing module converting the sense signal into an actual waving data which is subsequently sent to the control unit, such that the control unit compares the actual waving date with the target waving value and sends a feedback signal; and a feedback module receiving the feedback signal and producing a feedback reaction to inform the user.

Provided herein is a multi-purpose exercise apparatus for improving sports coordination with which a user may sense stimuli from inside and outside one's body and at the same time operate one's body functions so as to adapt to the given circumstances using body muscles when playing a football, volleyball, handball, tennis, table tennis game and the like, thereby improving abilities of adjusting one's body parts such as the user's correct posture, balance, timing, flexibility, agility and the like, especially, significantly improving the ball control technique, body senses, and judgment ability of ball game players or sports participants.