Trajectory detection and feedback system for tennis

摘要

A system for capturing and analyzing a trajectory of a tennis ball or other object associated with a play of a game of tennis and providing feedback is described. The system may be designed to capture and analyze a trajectory of a tennis ball during various activities related to the play of a game of tennis. The system may be configured to provide immediate feedback that may be utilized by a player to improve their performance as well as provide entertainment value above and beyond what is normally associated with the play of a game of tennis. Further, the system may be operable for use in an area where tennis is normally played during normal playing activities, such as player playing a game or practicing on an outdoor tennis court. The system may be operable to account for factors associated with its ambient environment, such as wind, temperature and humidity.

主权项

1. A non-transitory computer readable medium configured to store a computer program used by a computer, the computer readable medium comprising:
computer code configured to control generation of images of a virtual tennis ball as a function of time which are output to a display worn on a user's head which delivers images into at least one of a user's eyes to mimic a position of a real tennis ball as the function of time approaching a user; computer code configured to determine (1) speed, position, and orientation of a hand-held device as the function of time based upon sensor data from one or more sensors, (2) when the virtual tennis ball is hit by the user based upon the position and the orientation of the hand-held device as the function of time and a virtual position of the tennis ball as the function of time, and (3) an orientation of the hand-held device relative to the virtual tennis ball when the virtual tennis ball is determined to be hit by the user; computer code configured to determine a spin of the virtual tennis ball based upon the speed of the hand-held device as the function of time and the orientation of the hand-held device relative to the virtual tennis ball when the virtual tennis ball is determined to be hit by the user; computer code configured to calculate a trajectory for the virtual tennis ball based upon the speed of the hand-held device, the spin of the virtual tennis ball, and the orientation of the hand-held device relative to the virtual tennis ball when the virtual tennis ball is determined to be hit by the user; when the virtual tennis ball is determined to be hit by the user, computer code configured to trigger a haptic sensation generator in the hand-held device wherein the haptic sensation generator transmits one or more haptic sensations to the user which mimic a feel of the real tennis ball being hit; and computer code configured to control, based upon the calculated trajectory, generation of second images of the virtual tennis ball which are output to the display worn on the user's head and which show the virtual position of the virtual tennis ball as the function of time after the virtual tennis ball is determined to be hit moving away from the user according to the calculated trajectory.