Control and integration of sensory data
View Patent ↗A sensory data integration system for integrating sensory data generated by a first sensory substitution device and sensory data generated by a second sensory substitution device. The system includes a processor configured to generate an orientation signal indicative of a difference between a subject's orientation and an acceptable orientation. The orientation signal is based on the sensory data generated by the first sensory substitution device and the sensory data generated by the second sensory substitution device.
1. A method of determining and providing orientation cues for a balance-impaired subject, the method comprising:
obtaining first data related to a first state of the subject from a first sensory substitution device, wherein the first sensory substitution device is selected from a group consisting of a vibratometer configured to detect a vibration in the subject, a magnetometer configured to measure an ambient magnetic field, an altimeter, and an electromyography device configured to detect activity in a muscle of the subject;
obtaining second data related to a second state of the subject from a second sensory substitution device on the subject's torso, the second state including a motion and an orientation of the subject;
determining, by a processor, at least in part on the basis of a weighted combination of the first data and the second data, an updated context of the subject;
dynamically updating, by a processor, a definition of an acceptable region within a state space defined by at least the first and second states, based on the updated context of the subject;
determining, by a processor, a deviation of a position of the subject from the updated acceptable region within the state space;
determining, by a processor, an orientation cue for the subject wherein the cue indicates in which particular manner and direction the subject should change the subject's orientation to reduce the deviation, wherein the orientation cue is selected from a group consisting of a tactile cue provided through vibrating elements on the subject's body, an audio cue provided through a speaker, a visual cue provided through a display, and an electrical cue provided through an electrical stimulation; and
providing the orientation cue to the subject.
2. The method of claim 1 , further comprising deactivating the first sensory substitution device based on the context.
3. The method of claim 1 , wherein obtaining the second data comprises obtaining data indicative of a pressure on the subject's foot.
4. The method of claim 1 , wherein obtaining first data comprises obtaining data indicative of when a subject's heel strikes the ground.
5. The method of claim 1 , wherein determining the updated context comprises determining that the subject is rising from a chair, and wherein providing an orientation cue comprises providing the orientation cue following a time sufficient to allow the subject to transition from a sitting position to a standing position.
6. The method of claim 1 , wherein determining a context comprises determining that the subject is standing on a slope.
7. The method of claim 1 , wherein determining a context comprises determining that the subject is walking upstairs.
8. The method of claim 1 , wherein determining a context comprises determining that the subject is walking, and wherein providing a cue comprises providing a cue selected to encourage the subject to maintain a forward pitch.
9. The method of claim 1 , wherein determining a context comprises determining that the subject is carrying a load, and wherein providing a cue comprises providing a cue selected to encourage the subject to lean in an antipodal direction.
10. The method of claim 1 , wherein determining a context comprises determining that wet conditions prevail, and wherein providing an orientation cue comprises providing an orientation cue selected to encourage the subject to maintain a pitch angle within a selected threshold of vertical, the selected threshold being dependent on whether wet or dry conditions prevail.
11. The method of claim 1 , wherein the updated acceptable region within the state space is determined by a processor based on the subject's probable activity.
12. The method of claim 11 , wherein the subject's probable activity is determined by a processor based on the subject's context as derived from the first data and the second data.
13. The method of claim 1 further comprising determining the position of the subject within the state space based on the first data and the second data.
14. The method of claim 1 , wherein the orientation cue is provided upon determining that the deviation of the position of the subject from the updated acceptable region is sufficiently high.
15. The method of claim 14 , wherein the updated acceptable region within the state space is determined based on the subject's probable activity.