MACHINE LEARNING OF KNOWN OR UNKNOWN MOTION STATES WITH SENSOR FUSION

• US 20120265716A1
• Filed: 10/07/2011
• Published: 10/18/2012
• Est. Priority Date: 01/19/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Hunzinger, Jason Frank, Sarah, Anthony, Baheti, Pawan K.
• Granted Patent: US 8,756,173 B2
• Time in Patent Office: Days
• US Class Current: 706/12
• CPC Class Codes: G01P 15/00 Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
• CPC Class Codes: G06F 18/217 Validation; Performance evaluation; Active pattern learning techniques
• CPC Class Codes: G06F 18/2411 based on the proximity to a decision surface, e.g. support vector machines
• CPC Class Codes: G06F 18/24137 Distances to cluster centroïds
• CPC Class Codes: G06F 18/2453 non-linear, e.g. polynomial classifier
• CPC Class Codes: G06F 18/251 of input or preprocessed data
• CPC Class Codes: G06F 2218/12 Classification; Matching
• CPC Class Codes: G06N 20/00 Machine learning
• CPC Class Codes: G06N 20/10 using kernel methods, e.g. support vector machines [SVM]
• CPC Class Codes: G06N 3/126 Evolutionary algorithms, e.g. genetic algorithms or genetic programming
• CPC Class Codes: G06N 5/02 Knowledge representation; Symbolic representation
• CPC Class Codes: G06N 5/022 Knowledge engineering; Knowledge acquisition
• CPC Class Codes: G06N 5/048 Fuzzy inferencing
• CPC Class Codes: G06N 7/01 Probabilistic graphical models, e.g. probabilistic networks
• CPC Class Codes: G06V 40/25 Recognition of walking or running movements, e.g. gait recognition

Abstract

Example methods, apparatuses, or articles of manufacture are disclosed herein that may be utilized, in whole or in part, to facilitate or support one or more operations or techniques for machine learning of known or unknown motion states with sensor fusion.

Claims

1. A method comprising:

extracting, at a mobile device, at least one feature from at least one sensor signal;

recognizing at least one primitive based, at least in part, on said at least one extracted feature, said at least one primitive being indicative of a pattern of movement of said mobile device; and

identifying a previously unknown motion state based, at least in part, on said at least one recognized primitive.

2. The method of claim 1, wherein said previously unknown motion state is distinguishable from a previously known motion state based, at least in part, on a measure of confidence or consistency.

3. The method of claim 2, wherein said measure of confidence or consistency comprises a cumulative statistical probability of a sample distribution within a cluster.

4. The method of claim 2, wherein said measure of confidence or consistency comprises an individual iteration-based statistical probability.

5. The method of claim 1, and further comprising initiating discovery of at least one additional primitive in response to said previously unknown motion state not being distinguishable from at least one of the following:

a previously known motion state, said previously unknown motion state, a previously unknown distinguishable motion state, or any combination thereof.

6. The method of claim 5, wherein said discovery of said at least one additional primitive is initiated based, at least in part, on a measure of confidence or consistency.

7. The method of claim 5, wherein said discovery of said at least one additional primitive is performed in connection with an application of a genetic algorithm-type process.

8. The method of claim 5, and further comprising storing at least one digital signal representing said previously unknown motion state as a known motion state defined, at least in part, by said at least one additional primitive.

9. The method of claim 1, and further comprising identifying a previously known motion state based, at least in part, on said at least one recognized primitive.

10. The method of claim 1, wherein said recognizing said at least one primitive is based, at least in part, on a probabilistic logical determination.

11. The method of claim 1, wherein said at least one feature comprises at least one pre-defined feature.

12. The method of claim 1, wherein said identifying said previously unknown motion state comprises identifying said state while said mobile device is in a power-saving mode.

13. The method of claim 12, wherein said power-saving mode comprises an operating mode sufficient to identify said previously unknown motion state based, at least in part, on a minimum number of primitives.

14. The method of claim 13, wherein while operating in said power-saving mode said mobile device uses, at least in part, sensor configuration with variable sensor activation parameters.

15. The method of claim 1, wherein said previously unknown motion state comprises at least one of the following:

an unknown distinguishable motion state, an unknown indistinguishable motion state, or any combination thereof.

16. The method of claim 15, wherein said unknown indistinguishable motion state is identified based, at least in part, on a primitive discovery.

17. The method of claim 15, wherein said unknown distinguishable motion state is identified based, at least in part, on at least one new logical inference.

18. The method of claim 1, wherein said previously unknown motion state is identified in response to a user interaction with said mobile device.

19. The method of claim 1, wherein said at least one sensor signal comprises at least one of the following:

an inertial sensor signal, an ambient environment sensor signal, or any combination thereof.

20. The method of claim 1, wherein said at least one sensor signal is generated, at least in part, by at least one of the following disposed in said mobile device:

an accelerometer, a gyroscope, a magnetometer, a temperature sensor, an ambient light detector, a proximity sensor, a barometric pressure sensor, or any combination thereof.

21. An apparatus comprising:

a mobile device comprising at least one processor configured to;

extract at least one feature from at least one sensor signal;

recognize at least one primitive based, at least in part, on said at least one extracted feature, said at least one primitive being indicative of a pattern of movement of said mobile device; and

identify a previously unknown motion state based, at least in part, on said at least one recognized primitive.

22. The apparatus of claim 21, wherein said previously unknown motion state is distinguishable from a previously known motion state based, at least in part, on a measure of confidence or consistency.

23. The apparatus of claim 22, wherein said measure of confidence or consistency comprises a cumulative statistical probability of a sample distribution within a cluster.

24. The apparatus of claim 21, wherein said at least one processor is further configured to:

initiate discovery of at least one additional primitive in response to said previously unknown motion state not being distinguishable from at least one of the following;

a previously known motion state, said previously unknown motion state, a previously unknown distinguishable motion state, or any combination thereof.

25. The apparatus of claim 24, wherein said discovery of said at least one additional primitive is performed in connection with an application of a genetic algorithm-type process.

26. The apparatus of claim 24, wherein said at least one processor is further configured to:

store at least one digital signal representing said previously unknown motion state as a known motion state defined, at least in part, by said at least one additional primitive.

27. The apparatus of claim 21, wherein said at least one processor is further configured to:

recognize said previously unknown motion state responsive to a user interaction with said mobile device.

28. The apparatus of claim 21, wherein said at least one processor is further configured to:

identify a previously known motion state based, at least in part, on said at least one recognized primitive.

29. The apparatus of claim 21, wherein said at least one processor is configured to recognize said at least one primitive based, at least in part, on a probabilistic logical determination.

30. The apparatus of claim 21, wherein said at least one processor is configured to identify said previously unknown motion state by identifying said state while said mobile device is in a power-saving mode sufficient to identify said previously unknown motion state based, at least in part, on a minimum number of primitives.

31. The apparatus of claim 21, wherein said previously unknown motion state comprises at least one of the following:

an unknown distinguishable motion state, an unknown indistinguishable motion state, or any combination thereof.

32. The apparatus of claim 31, wherein said at least one processor is configured to identify said unknown indistinguishable motion state based, at least in part, on a primitive discovery.

33. The apparatus of claim 31, wherein said at least one processor is configured to identify said unknown distinguishable motion state based, at least in part, on at least one new logical inference.

34. The apparatus of claim 21, wherein said at least one processor is configured to identify said previously unknown motion state in response to a user interaction with said mobile device.

35. The apparatus of claim 21, wherein said at least one sensor signal comprises at least one of the following:

an inertial sensor signal, an ambient environment sensor signal, or any combination thereof.

36. An apparatus comprising:

means for extracting, at a mobile device, at least one feature from at least one sensor signal;

means for recognizing at least one primitive based, at least in part, on said at least one extracted feature, said at least one primitive being indicative of a pattern of movement of said mobile device; and

means for identifying a previously unknown motion state based, at least in part, on said at least one recognized primitive.

37. The apparatus of claim 36, said previously unknown motion state is distinguishable from a previously known motion state based, at least in part, on a measure of confidence or consistency.

38. The apparatus of claim 37, wherein said measure of confidence or consistency comprises a cumulative statistical probability of a sample distribution within a cluster.

39. The apparatus of claim 36, and further comprising means for initiating discovery of at least one additional primitive in response to said previously unknown motion state not being distinguishable from at least one of the following:

a previously known motion state, said previously unknown motion state, a previously unknown distinguishable motion state, or any combination thereof.

40. The apparatus of claim 39, wherein initiating discovery of said at least one additional primitive is initiated based, at least in part, on a measure of confidence or consistency.

41. The apparatus of claim 39, wherein said discovery of said at least one additional primitive is performed in connection with an application of a genetic algorithm-type process.

42. The apparatus of claim 39, and further comprising means for storing at least one digital signal representing said previously unknown motion state as a known motion state defined, at least in part, by said at least one additional primitive.

43. The apparatus of claim 36, and further comprising means for identifying a previously known motion state based, at least in part, on said at least one recognized primitive.

44. The apparatus of claim 36, wherein said means recognize said at least one primitive based, at least in part, on a probabilistic logical determination.

45. The apparatus of claim 36, wherein said means identify said previously unknown motion state while said mobile device is in a power-saving mode.

46. The apparatus of claim 45, wherein said power-saving mode comprises an operating mode sufficient to identify said previously unknown motion state based, at least in part, on a minimum number of primitives.

47. The apparatus of claim 46, wherein, while operating in said power-saving mode, said mobile device uses, at least in part, sensor configuration with variable sensor activation parameters.

48. The apparatus of claim 36, wherein said previously unknown motion state comprises at least one of the following:

an unknown distinguishable motion state, an unknown indistinguishable motion state, or any combination thereof.

49. The apparatus of claim 48, wherein said unknown indistinguishable motion state is identified based, at least in part, on a primitive discovery.

50. The apparatus of claim 48, wherein said unknown distinguishable motion state is identified based, at least in part, on at least one new logical inference.

51. The apparatus of claim 36, wherein said previously unknown motion state is identified in response to a user interaction with said mobile device.

52. The apparatus of claim 36, wherein said at least one sensor signal comprises at least one of the following:

an inertial sensor signal;

an ambient environment sensor signal;

or any combination thereof.

53. An article comprising:

a non-transitory storage medium having instructions stored thereon executable by a special purpose computing platform at a mobile device to;

extract at least one feature from at least one sensor signal;

recognize at least one primitive based, at least in part, on said at least one extracted feature, said at least one primitive being indicative of a pattern of movement of said mobile device; and

identify a previously unknown motion state based, at least in part, on said at least one recognized primitive.

54. The article of claim 53, wherein said previously unknown motion state is distinguishable from a previously known motion state based, at least in part, on a measure of confidence or consistency.

55. The article of claim 54, wherein said measure of confidence or consistency comprises a cumulative statistical probability of a sample distribution within a cluster.

56. The article of claim 53, wherein said storage medium further includes instructions to:

initiate discovery of at least one additional primitive in response to said previously unknown motion state not being distinguishable from at least one of the following;

a previously known motion state, said previously unknown motion state, a previously unknown distinguishable motion state, or any combination thereof.

57. The article of claim 53, wherein said storage medium further includes instructions to:

identify a previously known motion state based, at least in part, on said at least one recognized primitive.

58. The article of claim 53, wherein said instructions to said recognize said at least one primitive is based, at least in part, on a probabilistic logical determination.

59. The article of claim 53, wherein said instructions to identify said previously unknown motion state comprise instructions to identify said state while said mobile device is in a power-saving mode sufficient to said identify said previously unknown motion state based, at least in part, on a minimum number of primitives.

60. The article of claim 53, wherein said previously unknown motion state comprises at least one of the following:

an unknown distinguishable motion state identified based, at least in part, on a primitive discovery;

an unknown indistinguishable motion state identified based, at least in part, on at least one new logical inference;

or any combination thereof.