Athletic performance monitoring systems and methods in a team sports environment
Systems and methods for sensing and monitoring various athletic performance metrics, e.g., during the course of a game, a practice, a training session, training drills, and the like, are described. These systems and methods can provide useful metrics for players and coaches relating to athletic performances in various sports, including various team sports.
1. A game ball, comprising:
a force sensor for detecting changes in internal forces within the game ball during a time period;
an inertial sensor for detecting changes in motion of the game ball during the time period; and
a propulsion determination module for processing data generated by the force sensor and data generated by the inertial sensor for determining which one of a throwing action and a kicking action was used to propel the game ball away from a user during the time period, the propulsion determination module for determining that the ball was propelled away from the user by a kicking action when: (a) the force sensor indicates an internal force amount above a first predetermined threshold, caused by impact propelling the game ball, lasting less than a first predetermined time period before falling below the first predetermined threshold, and (b) the inertial sensor indicates a change in a ball movement characteristic above a second predetermined threshold.
2. A game ball according to claim 1 , wherein the inertial sensor includes an accelerometer.
3. A game ball according to claim 2 , wherein the force sensor includes an internal ball gas pressure sensor.
4. A game ball according to claim 3 , wherein the propulsion determination module processes pressure data generated by the pressure sensor and acceleration data generated by the accelerometer.
5. A game ball according to claim 1 , the propulsion determination module for determining that the ball was propelled away from the user by a kicking action based on at least one of a duration of a pressure change within the ball and a rate of speed reduction by the ball.
6. A game ball according to claim 1 , wherein the force sensor includes an internal ball gas pressure sensor.
7. A game ball according to claim 6 , further comprising:
an output system for outputting data generated by the propulsion determination module.
8. A game ball according to claim 7 , wherein the output system includes a memory for storing the data generated by the propulsion determination module for post game ball use download.
9. A game ball according to claim 7 , wherein the output system includes a wireless transmission system.
10. A game ball according to claim 6 , wherein the propulsion determination module compares the data generated by the pressure sensor and the data generated by the inertial sensor.
11. A game ball according to claim 3 , wherein the first predetermined threshold is a pressure threshold and the second predetermined threshold is an acceleration threshold.
12. A game ball according to claim 1 , further comprising:
an output system for outputting data generated by the propulsion determination module.
13. A game ball according to claim 12 , wherein the output system includes a wireless transmission system.
14. A game ball according to claim 12 , wherein the output system includes a memory for storing at least one of: (a) the data generated by the force sensor and the inertial sensor or (b) data derived from data generated by the force sensor and the inertial sensor, for post game ball use download.
15. A game ball according to claim 1 , wherein the propulsion determination module compares the data generated by the force sensor and the data generated by the inertial sensor.
16. A system for monitoring motion of a game ball, comprising:
a game ball;
a force sensor for detecting changes in internal forces within the game ball during a time period;
an inertial sensor for detecting changes in ball motion during the time period; and
a ball motion monitoring system for processing at least one data set selected from the group consisting of: (a) data generated by the force sensor and data generated by the inertial sensor or (b) data derived from the data generated by the force sensor and data derived from the data generated by the inertial sensor, said ball motion monitoring system further for determining which one of a throwing action and a kicking action was used to propel the game ball away from a user during the time period, wherein the ball motion monitoring system determines that the ball was propelled away from the user by a kicking action when: (a) the force sensor indicates a force above a first predetermined threshold, caused by impact propelling the game ball, lasting less than a first predetermined time period before falling below the first predetermined threshold, and (b) the inertial sensor indicates a change in a ball movement characteristic above a second predetermined threshold.
17. A system according to claim 16 , wherein the inertial sensor includes an accelerometer.
18. A system according to claim 17 , wherein the force sensor includes an internal ball gas pressure sensor.
19. A system according to claim 18 , wherein the ball motion monitoring system determines which one of a throwing action and a kicking action was used to propel the game ball by processing pressure data generated by the pressure sensor and acceleration data generated by the accelerometer.
20. A system according to claim 18 , wherein the first predetermined threshold is a pressure threshold and the second predetermined threshold is an acceleration threshold.
21. A system according to claim 17 , wherein the ball motion monitoring system determines that the ball was propelled away from the user by a kicking action based on a duration of a pressure change within the ball.
22. A system according to claim 16 , wherein the force sensor includes an internal ball gas pressure sensor.
23. A system according to claim 22 , wherein the ball motion monitoring system compares the data generated by the pressure sensor and the data generated by the inertial sensor.
24. A system according to claim 16 , wherein the ball motion monitoring system determines that the ball was propelled away from the user by a kicking action based on a duration of a pressure change within the ball.
25. A system according to claim 16 , wherein at least some portion of the inertial sensor is engaged with the game ball.
26. A system according to claim 16 , wherein at least some portion of the force sensor is engaged with the game ball.