METHOD AND APPARATUS FOR DETERMINING SPORTSMAN JUMPS USING FUZZY LOGIC

• US 20130346013A1
• Filed: 09/12/2012
• Published: 12/26/2013
• Est. Priority Date: 06/22/2012
• Status: Active Grant

• Current Assignee: AlpineReplay, Inc.
• Original Assignee: AlpineReplay, Inc.
• Inventors: Lokshin, Anatole M., Kuzkin, Vitaly
• Granted Patent: US 9,326,704 B2
• Time in Patent Office: Days
• US Class Current: 702/141
• CPC Class Codes: A43B 3/34 with electrical or electronic arrangements
• CPC Class Codes: A61B 2503/10 Athletes
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/1112 Global tracking of patients, e.g. by using GPS
• CPC Class Codes: A61B 5/112 Gait analysis
• CPC Class Codes: A61B 5/1123 Discriminating type of movement, e.g. walking or running A61B5/1116, A61B5/112 take precedence
• CPC Class Codes: A61B 5/7264 Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems neural networks per se G06N3/00; expert systems per se G06N5/00
• CPC Class Codes: A63B 2220/40 Acceleration
• CPC Class Codes: A63B 24/0062 Monitoring athletic performances, e.g. for determining the work of a user on an exercise apparatus, the completed jogging or cycling distance
• CPC Class Codes: G16H 20/30 relating to physical therapies or activities, e.g. physiotherapy, acupressure or exercising

Abstract

A method and apparatus for detecting a jump of a moving sportsman and separating the jump from other sportsman motion is described. Accelerometer data generated by a sportsman'"'"'s motion is received in a computing device. The computing device is used to apply fuzzy logic membership functions to a plurality of parameters associated with the accelerometer data to detect a pattern associated with jumps. A subset of the data is identified as representing a jump based upon the detection of the pattern. The determination is used in the computing device to transform data, whereby jumps are separated from other sportsman motion.

Claims

1. A method for detecting a jump of a moving sportsman and separating the jump from other sportsman motion, comprising:

receiving, in a computing device, accelerometer data generated by a sportsman'"'"'s motion;

using said computing device to apply fuzzy logic membership functions to a plurality of parameters associated with said accelerometer data to detect a pattern associated with jumps;

identifying a subset of said data as representing a jump based upon said detection of said pattern; and

,

using said determination in said computing device to transform data in said computing device, whereby jumps are separated from other sportsman motion.

2. The method for detecting a jump of a moving sportsman according to claim 1, wherein said determination is based in part upon GPS sensor measurements in addition to said accelerometer data.

3. The method for detecting a jump of a moving sportsman according to claim 2, wherein fuzzy logic membership functions are applied to said GPS sensor measurements to assist in said jump detection.

4. The method for detecting a jump of a moving sportsman according to claim 1, wherein a time duration of the jump of the moving sportsman is further determined.

5. The method for detecting a jump of a moving sportsman according to claim 1, wherein said detection of said pattern comprises the steps of:

determining an initial jump probability membership function;

determining a jump start probability membership function;

determining landing shock probability membership functions;

determining a false jump probability membership function; and

,

combining the jump start, landing shock, membership functions together using fuzzy logic rules.

6. The method for detecting a jump of a moving sportsman according to claim 3, wherein acceptance and rejection are mapped as 2D regions on a membership function vs. a jumptime plane.

7. The method for detecting a jump of a moving sportsman according to claim 4, wherein a total norm of a 3x axis accelerometer is used.

8. The method for detecting a jump of a moving sportsman according to claim 4, wherein a projection of an accelerometer vector to the magnetic vector is used.

9. The method for detecting a jump of a moving sportsman according to claim 4, wherein accelerometer data are collected only when device has velocity above some predetermined threshold.

10. The method for detecting a jump of a moving sportsman according to claim 7, wherein accelerometer readings are corrected by an approximate rotational acceleration computed from the gyro sensors.

11. The method for detecting a jump of a moving sportsman according to claim 1, wherein the steps are performed by a remote computing device that receives at least time tagged accelerometer data from a portable data collection device associated with the sportsman.

12. The method for detecting a jump of a moving sportsman according to claim 1, wherein the steps are performed by a portable data collection device associated with the sportsman.

13. The method for detecting a jump of a moving sportsman according to claim 12, wherein the portable data collection device associated with the sportsman comprises a smartphone with an accelerometer therein.

14. A method for detecting a jump of a moving sportsman and separating the jump from other sportsman motion, comprising:

receiving, in a computing device, accelerometer data generated by a sportsman'"'"'s motion;

using said computing device to filter out data that is known not to contain a jump;

computing a first fuzzy membership function for a launch set;

computing a second fuzzy membership function for an in-air set;

computing a third fuzzy membership function for a landing shock set;

using said first, second and third fuzzy membership functions to compute a fourth fuzzy membership function for a jump set;

merging closed adjacent sets using fuzzy logic rules; and

,

selecting a set of measurements where said jump membership function is inside an acceptance region.

15. A computer program product comprising a non-transitory computer readable storage medium having computer readable program code embodied in the medium for implementing a method of detecting a jump of a moving sportsman and separating the jump from other sportsman motion, the computer program product comprising:

program code for receiving, in a computing device, accelerometer data generated by a sportsman'"'"'s motion;

program code for using said computing device to apply fuzzy logic membership functions to a plurality of parameters associated with said accelerometer data to detect a pattern associated with jumps;

program code for identifying a subset of said data as representing a jump based upon said detection of said pattern; and

,

program code for using said determination in said computing device to transform data in said computing device, whereby jumps are separated from other sportsman motion.

16. A method, comprising:

receiving, in a computing device, accelerometer data generated by a sportsman'"'"'s motion;

performing a launch analysis of a launch portion of said accelerometer data;

performing an in-air analysis of an in-air portion of said accelerometer data;

performing a landing shock analysis of a landing shock portion of said accelerometer data;

performing a false jump analysis of at least a portion of said accelerometer data;

combining results of said launch analysis, said in-air analysis, said landing shock analysis and said false jump analysis to detect a jump of said sportsman.