A golf ball with embedded electronics to allow proximity to be tracked and to monitor golfer performance is disclosed. The golf ball comprises a processor connected to an accelerometer, communications circuitry, a spin detector, and memory, wherein the processor stores accelerometer data from the accelerometer and rotation data regarding rotation of the spin detector in the memory. The processor converts the data regarding the rotation of the spin detector into a rotation speed and a rotation direction, said rotation speed determined by a frequency of the data, and said rotation direction determined by a magnitude of the data. The communications circuitry is configured to communicate the accelerometer data, the rotation direction, and the rotation speed to a central interrogator for analysis of a golfer's performance.

Embodiments provide apparatuses, systems, and methods associated with a location-aware autonomous self-propelled sports ball. The sports ball may detect its location relative to one or more locator tags and control its self-propelled movement based on the detected location. The locator tags may be worn by respective users of the sports ball and/or placed on the ground. The sports ball may operate in different modes that control movement of the sports ball relative to the one or more locator tags, such as tag, chase, auto-return, side-to-side, and race. Other embodiments may be described and/or claimed.

In one aspect, an example system includes an arrow nock configured to couple to an arrow, a transmitter coupled to the arrow nock, and a controller. The controller is configured to (i) determine that the arrow has been shot from a bow and (ii) responsive to determining that the arrow has been shot from the bow, cause the transmitter to transmit a beacon signal at a variable rate that varies based on an amount of time elapsed since determining that the arrow has been shot from the bow.

A method and system for use in the game of football to determine ball placement and position, as well as first down demarcations, is described, with various embodiments configured to track the location of a football to determine its position on the field and to determine and display the first down demarcation on the field. Certain embodiments employ software to assist in performing placement determinations, distance determinations, track movement of the ball, first down markers, as well as light emitting modules along a track that extends parallel to the field.

A sports ball and player position reckoning system, comprising instrumentation in either a sports ball on on a player's person that allows one or more players to be electronically located on a playing field or court each time a goal attempt is made. The instrumentation is configured to either fit through the opening of an inflation port of the ball when the fill valve is removed or attached to a player or a piece of player's clothing. The system works in conjunction with a performance monitor system that detects ball interactions with a goal and is used to trigger the system to analyze the ball flight path just prior to the goal interaction. Player position is ascertained through the localization of the initial position of the player at the start of a ball's flight path.

The present disclosure provides a putting guide system including at least one projector installed in an upper portion of a putting room including a floor surface composed of a putting field and capable of projecting an image onto the putting field, a camera located in the upper portion of the putting room near the at least one projector to capture an image of the putting field, a control module for providing physical property information of a putting environment based on the image provided from the camera to be analyzed and for controlling the projector, a server connected to the control module by wire/wireless to analyze a putting result and statistics and providing the analyzed result to a user terminal, and a user terminal for controlling the control module through a putting interface received from the server to perform a putting training program.

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 and apparatus for determining the precise location of a target on a surface by utilizing a plurality of objects that are fixed in their position proximate to the location, thereby constituting a plurality of fixed reference points, upon which the target(s) resides or is otherwise located. The plurality of fixed references points are used either in conjunction with images of the target or certain distance measurements between the target and the fixed reference points to determine the precise location of the target(s) on the surface.

Provided is an electronic device including: a trajectory calculation unit measuring an initial physical quantity of a hit ball and calculating a trajectory of the ball by using the initial physical quantity; an azimuth sensor measuring a first azimuth corresponding to a direction that the trajectory calculation unit faces; and a control unit calculating a displacement of the ball by using the first azimuth and the trajectory of the ball.

An electronic tracking system for assisting a user in determining distances to landmarks and objects in a sporting environment includes a user tracking system for determining the location of a user, a heads up display for displaying information to the user, and a processor operable to communicate with the user tracking system and the heads up display. The heads up display is designed to be worn on the user's head, and to display an image within the user's field of view. The processor is programmed to determine a distance between the user's determined location and an object or a landmark on. This information is displayed via the heads up display as a numeric representation of the determined distance.