Wearable sensor system for providing a personal magnetic field and techniques for horizontal localization utilizing the same

Patent metadata

Field	Value
Publication number	US-9996162-B2
Application number	US-201514976750-A
Country	US
Kind code	B2
Filing date	Dec 21, 2015
Priority date	Dec 21, 2015
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A wearable sensor system is disclosed that provides a measurable magnetic field that changes horizontally within the range of motion of human limbs. The wearable sensor system includes a magnetic sensing device, and one or more magnet devices that provide the measurable magnetic field with a strength exceeding the Earth's magnetic field. To this end, the magnetic sensing system provides a “personal” magnetic field about a user, with that magnetic field traveling with the user and overpowering adjacent interfering fields. The wearable sensor system may include a sensor arrangement that measures a strength of the personal magnetic field and field direction to perform horizontal localization, and may send a representation of a same to a remote computing device to cause an action to occur. Some such actions include output of pre-recorded or synthesized musical notes, for example.

First claim

What is claimed is:

1. A wearable sensor system, comprising:
an article of clothing;
a first magnet device secured to the article of clothing about a first region thereof, the first magnet device configured to provide a first magnetic field having a first field strength and a first field direction;
a second magnet device configured to provide a second magnetic field having a second field strength and a second field direction, the second magnet device secured to the article of clothing about a second region generally opposite to the first region such that an orientation of the second magnetic field is generally opposite to an orientation of the first magnetic field when the article of clothing is worn by a user;
wherein the first and second magnet devices have a magnetic field strength greater than that of the Earth's magnetic field;
a sensor arrangement including a magnetic sensing device; and
circuitry configured to:
receive a signal representing a measured magnetic field strength M and a field direction D from the magnetic sensing device, the measured magnetic field strength M and field direction D being of the first magnetic field or a third magnetic field introduced by a magnetic attraction between the first magnet device and the second magnet device; and
identify a horizontal region of the magnetic sensing device based at least in part on the measured magnetic field strength M.

2. The wearable sensor system of claim 1 , wherein the article of clothing comprises a waist-worn article of clothing, and wherein the first and second magnet devices are secured about 180 degrees apart from each other on the waist-worn article of clothing.

3. The wearable sensor system of claim 1 , wherein the first and second magnet devices are disposed in a front-back orientation, the front-back orientation generally aligning poles of each of the first and second magnet devices along a horizontal axis.

4. The wearable sensor system of claim 1 , wherein the first and second magnet devices have a magnetic field strength at least twice that of the Earth's magnetic field.

5. The wearable sensor system of claim 1 , wherein the magnetic sensing device is at least one of a dual-axis or tri-axis magnetometer device.

6. The wearable sensor system of claim 1 , wherein the circuitry is further configured to calculate an absolute intensity |M| based on the measured magnetic field strength M using on the following equation:
| M |=√{square root over ( MX 2 +MY 2 +MZ 2 )}

wherein X, Y, and Z correspond to directional components in a Cartesian coordinate system.

7. The wearable sensor system of claim 6 , wherein the circuitry identifies the horizontal region in part by comparing the calculated absolute intensity |M| to a plurality of predefined absolute intensity values stored in a memory.

8. The wearable sensor system of claim 7 , wherein the plurality of predefined absolute intensity values are stored within the memory as a lookup table, the lookup table including a plurality of horizontal region identifiers and a range of absolute intensity values corresponding to each respective horizontal region identifier.

9. The wearable sensor system of claim 8 , wherein identifying a horizontal region of a wearable sensor device includes determining if the calculated absolute intensity value |M| is within a range of absolute intensity values corresponding to a particular horizontal region identifier.

10. The wearable sensor system of claim 8 , wherein the lookup table further includes a predefined field direction for at least one horizontal region identifier, and wherein identifying a horizontal region of a wearable sensor device includes determining if the calculated absolute intensity value |M| is within a range of absolute intensity values corresponding to a particular horizontal region identifier, and determining the predefined field direction of the particular horizontal region identifier matches the field direction D received from the magnetic sensing device.

11. The wearable sensor system of claim 1 , further comprising a wireless transceiver circuit, and wherein the circuitry is further configured to send an action event message to a remote computing device via the wireless transceiver circuit, the action event message including a representation of the identified horizontal region.

12. The wearable sensor system of claim 11 , wherein the action event message is configured to cause the remote computing device to perform a predefined action, wherein the predefined action includes at least one of outputting a synthesized musical note or a prerecorded sound.

13. A computer-implemented method for determining a horizontal region of a wearable sensor system, the method comprising:
receiving a value representing a measured magnetic field strength M;
calculating an absolute intensity |M| based on the measured magnetic field strength M;
identifying a first horizontal region of a wearable sensor device in response to the calculated absolute intensity |M| corresponding with a first magnetic field;
identifying a second horizontal region of a wearable sensor device in response to the calculated absolute intensity |M| corresponding with a second magnetic field; and
sending, in response to identifying the horizontal region, an action event message including the first or second identified horizontal region to a remote computing device
wherein the first and second magnetic fields have a field strength greater than that of the Earth's magnetic field.

14. The method of claim 13 , wherein the absolute intensity |M| is calculated using the following equation:
| M |=√{square root over ( MX 2 +MY 2 +MZ 2 )}

wherein X, Y, and Z correspond to directional components in a Cartesian coordinate system.

15. The method of claim 13 , wherein identifying the first and second horizontal regions further comprises comparing the calculated absolute intensity |M| to a plurality of predefined absolute intensity values stored in a memory.

16. The method of claim 15 , wherein the plurality of predefined absolute intensity values are stored within the memory as a lookup table, the lookup table including a plurality of horizontal region identifiers and a range of absolute intensity values corresponding to each respective horizontal region identifier, and wherein identifying a horizontal region of a wearable sensor device includes determining if the calculated absolute intensity value |M| is within a range of absolute intensity values corresponding to a particular horizontal region identifier.

17. The method of claim 13 , wherein the action event message is configured to cause the remote computing device to output at least one of a synthesized musical note or a preordered sound via a speaker device.

18. A system, comprising:
a first magnet for generating a first magnetic field;
a second magnet for generating a second magnetic field, wherein the first and second magnetic fields are greater than that of the Earth's magnetic field;
wherein the first and second magnets introduce a third magnetic field based on an attraction between poles of the first and second magnets;
a wearable sensor arrangement including a magnetic sensing device; and
circuitry disposed in a wearable device to:
receive a signal representing a measured magnetic field strength M and a field direction D from the magnetic sensing device;
identify a first horizontal region of the magnetic sensing device in response to the measured magnetic field strength M corresponding with the first magnetic field; and
identify a second

Assignees

• Intel Corp

Inventors

• Kar Swarnendu
• Parra Jeremy
• Shah Saurin
• Vogel Brian K

Classifications

• G10H2220/405

  Beam sensing or control, i.e. input interfaces involving substantially immaterial beams, radiation, or fields of any nature, used, e.g. as a switch as in a light barrier, or as a control device, e.g. using the theremin electric field sensing principle · CPC title

• G10H2220/395

  Acceleration sensing or accelerometer use, e.g. 3D movement computation by integration of accelerometer data, angle sensing with respect to the vertical, i.e. gravity sensing · CPC title

• G10H2220/391

  Angle sensing for musical purposes, using data from a gyroscope, gyrometer or other angular velocity or angular movement sensing device · CPC title

• G10H2220/201

  for movement interpretation, i.e. capturing and recognizing a gesture or a specific kind of movement, e.g. to control a musical instrument · CPC title

• G10H1/0555

  using magnetic or electromagnetic means · CPC title