A system and method for measuring motion properties of a movable object, such as a sporting device, wherein the movable object has an embedded magnetized unit creating a magnetic field. A measurement device, having a first magnetic field sensor positioned a known distance away from a second magnetic field sensor, is positioned in the vicinity of the movable object's trajectory, whereby the first and second magnetic field sensors output signals when the movable object passes within their respective proximities. A control module, that is responsive to the output signals created by the magnetic field sensors, is configured to record the times of output signal events. The control module is further configured to calculate motion properties, such as the speed and rate of spin, of the movable object based upon the recorded times of various sensor output events and the known distance between the first and second magnetic field sensors.

The present invention proposes a court, which is a half- or full-court in which ball sports, such as soccer (penalty kicks), foot volleyball, volleyball, and basketball (33 basketball), can be played. The court allows balls to be automatically and rapidly supplied in the case where it takes time to resume a game, such as a case where a game is replayed or a case where a ball is out according to the characteristics of each type of sport, or in the case where serve-reception practice is required, and also allows balls to be naturally collected and lifted because the court is inclined and allows the balls to be automatically classified according to the types of balls and to be supplied to the court.

Systems and techniques for sensor-derived object flight performance tracking are described herein. A set of magnetometer readings may be obtained from a magnetometer included with an object. A local rotation axis of the object may be determined at a time using the set of magnetometer readings. The local rotation axis may describe rotation of the object around a local magnetic target. A global rotation axis may be calculated based on an initial orientation of the object. The global rotation axis may describe a fixed rotation axis of the object during flight in a global coordinate frame, wherein an angle between the global rotation axis and magnetic north remains constant during the flight. An orientation of the object may be determined for the time using the global rotation axis and the local rotation axis of the object at the time.

A golf ball including at least a layer of ball shell, at least a layer of ball core, and an antenna layer is provided. The ball core is provided in the ball shell. The antenna layer is inserted between the ball shell and the ball core or provided on an outer side of the ball shell. A material of the antenna layer includes a conductive material having fluidity or ductility that auto-recovers the shape and does not break after a hit.

This invention discloses a method for measuring the rate of angular displacement, of a traveling object, using magnetic field sensing, said method comprising: measuring magnetic field intensity and/or changes in said magnetic field intensity, projected onto a magnetic field sensor coupled to said traveling object, each measurement being per orthogonal rotation axis to provide a magnetic field intensity value per axis and/or a change in magnetic field intensity per axis, as said object's orientation changes with time; determining, number of peaks, present in a measurement sample comprising a set of said measurements, of time duration; and computing said rate of angular displacement, for said traveling object, as a function of said determined number of peaks and said time duration.

A golf ball comprising an electrical component is disclosed herein. The electrical component comprises an integrated circuit having a gyroscope, a magnetometer, and a BLUETOOTH low energy (BTLE) radio, and at least one battery. A body is composed of an epoxy material, and the body encompasses the electrical component.

A method for establishing court information is provided. The method includes: establishing connection with an external smart ball; providing a prompt message indicating to move the external smart ball from a first characteristic spot of a court to a second characteristic spot of the court; obtaining sensing information from the external smart ball after providing the prompt message; calculating a movement trajectory of the external smart ball according to the sensing information; and obtaining a direction of a line connecting the first characteristic spot and the second characteristic spot in a geomagnetic coordinate. An electronic device and a non-transitory computer readable storage medium using the method are also provided.

The motion performance of an animal that makes a motion in response to the movement of at least one moving body other than the animal, which is a subject for evaluation, is properly evaluated. The motion data of the animal is acquired by manipulating the difficulty factor of the motion which is made by the animal in response to the movement of the moving body, and the motion performance of the animal is evaluated based on the motion data of the animal. It is to be noted that the motion data contains information indicating the timing of the motion of the animal.

A method and system for assessing heaviness of a swing in sport of tennis is disclosed. The system may display the calculated heaviness of a groundstroke in real-time. As the player hits ground strokes, the system will measure linear and rotational speed of the ball and calculate a heaviness value based on the physics of translational and rotational kinetic energy of the ball.

A training system includes a launching device house a computer electrically connected to a mechanical hopper and a plunger disposed within a casing sized to launch a lacrosse ball. The casing is structured and arranged to be movably connected to the housing such that at least one of a launch angle, speed, direction, distance and spin can all be selectively chosen by a user. At least one sensor is designed to be placed onto at least one of a player, the lacrosse ball, or a lacrosse net such that the sensors are structured and arranged to relay metric data to the computer in connection with a training program software operating on the computer, wherein the sensor(s) are wirelessly connected to the computer. A mobile device software application communicates with the computer for tracking the metric data and selective programming of the lacrosse ball tossing and training system by the player.