Systems and methods for single mobile device launch monitor and motion capture
A system for determining the trajectory of a sport object propelled via an implement using a single mobile device includes a single mobile device and a sensor in the single mobile device. The system further includes a swing radius module, the swing radius module calculating a swing radius of an implement swung by a user. The system further includes a notification module, the notification module providing a notification to the user that the swing radius is outside of a viewing frame of the sensor.
1 . A system for determining a trajectory of a sport object propelled via an implement using a single mobile device, the system comprising:
a smartphone or tablet;
a first sensor disposed within the smartphone or tablet;
a swing radius module running on the smartphone or tablet, the swing radius module calculating a swing radius of an implement swung by a user based on sensor data obtained from the first sensor;
a notification module running on the smartphone or tablet, the notification module providing a notification to the user whether a portion of the swing radius is outside of a viewing frame of the first sensor; and
a second sensor disposed at a known distance from the first sensor, wherein the second sensor is separate from the smartphone or tablet and in wired or wireless communication with the smartphone or tablet.
2 . The system of claim 1 , wherein the sport object is a golf ball and the implement swung by the user is a golf club.
3 . The system of claim 2 , wherein, based on the entire swing radius being inside of the viewing frame of the first sensor, the smartphone or tablet calculates, based on the swing radius and the sensor data obtained from the first sensor, a ball speed after the golf club makes contact with the golf ball.
4 . The system of claim 3 , wherein, based on the entire swing radius being inside of the viewing frame of the first sensor, the smartphone or tablet calculates, based on the ball speed and the sensor data obtained from the first sensor, a ball spin rate and ball spin direction after the golf club makes contact with the golf ball.
5 . The system of claim 4 , wherein the first sensor and second sensor are cameras, and wherein a magnification of the first camera and a magnification of the second camera are known.
6 . The system of claim 5 , further comprising a trajectory module configured to, based on the entire swing radius being inside of the viewing frame of the first sensor, using the ball speed, the ball spin rate, and the ball spin direction, correlate images from the first camera and the second camera using the known distances and magnifications of the first camera and the second camera to compute a trajectory of the sport object.
7 . The system of claim 1 , further comprising a pre-swing detection system running on the smartphone or tablet that calculates a length of a golf club based on the sensor data obtained from the first sensor.
8 . The system of claim 7 , wherein the pre-swing detection system calculates a length of the user's arms based on the sensor data obtained from the first sensor.
9 . The system of claim 8 , wherein the swing radius module calculates the swing radius based at least in part on the length of the golf club and the length of the user's arms.
10 . The system of claim 1 , wherein if the notification module indicates that a portion of the swing radius is outside the viewing frame of the first sensor, the user is notified to reposition the smartphone or tablet.
11 . A system for determining a trajectory of a sport object propelled via an implement using a mobile device, the system comprising:
a smartphone or tablet;
a first sensor disposed within the smartphone or tablet;
a second sensor separate from the smartphone or tablet and in wired or wireless communication with the smartphone or tablet, wherein a first-second inter-sensor distance between the first sensor and the second sensor is known;
swing radius module configured to determine whether the entire swing radius of the implement is within a viewing frame of the first sensor; and
a trajectory module configured to, based on the entire swing radius of the implement being within a viewing frame of the first sensor using the swing radius, correlate images from the first sensor and the second sensor using the first-second inter-sensor distance to compute a trajectory of the sport object.
12 . The system of claim 11 , wherein the first sensor and second sensor are cameras.
13 . The system of claim 11 , wherein a first magnification of the first sensor and a second magnification of the second sensor is known and the first and second magnifications are used by the trajectory module in correlating the images.
14 . The system of claim 11 , further comprising a pre-swing detection system that calculates a length of the implement, wherein the implement is a golf club.
15 . The system of claim 14 , wherein the pre-swing detection system calculates an arm length of a user of the implement.
16 . The system of claim 15 , wherein the swing radius module is further configured to compute the swing radius of the implement based in part on the length of the implement and the arm length of the user.
17 . The system of claim 16 , further comprising a notification module, the notification module providing a notification to a user that a portion of the swing radius of the implement is outside of a viewing frame of the first sensor.
18 . The system of claim 17 , wherein if the notification module indicates that the swing radius is outside the viewing frame of the sensor, the user is notified to reposition the single mobile device.
19 . A system for determining a trajectory of a sport object propelled via an implement using a smartphone or tablet, the system comprising:
software running on the smartphone or tablet and configured to communicate with a first sensor disposed on the smartphone or tablet;
a second sensor separate from the smartphone or tablet, wherein a first-second inter-sensor distance between the first sensor and the second sensor is known;
a swing radius module of the software, the swing radius module calculating, based on the images from the first sensor and the second sensor, a swing radius of an implement swung by a user;
a trajectory module of the software configured to based on the entire swing radius being within a viewing frame of the first sensor, correlate images from the first sensor and the second sensor using the first-second inter-sensor distance to compute a trajectory of the sport object;
and
a notification module of the software, the notification module providing a notification to the user the swing radius is outside of a viewing frame of the sensor.