IMU-based glove
This disclosure relates to a VR glove capable of measuring the movement of individual finger and thumb bones. The VR glove can include a plurality of inertial measurement units (IMUs) to track the movement of one or more finger and/or hand sections. The IMUs can include one or more motion sensors, such as a gyroscope and an accelerometer, for measuring the orientation, position, and velocity of objects (e.g., finger bones) that the IMU can be attached. An IMU can be located proximate to a finger (or thumb) bone and can measure the inertial motion of the corresponding bone. In some examples, the VR glove may include magnetometers to determine the direction of the geo-magnetic field. The VR glove can also include one or more other electronic components, such as a plurality of electrodes for sensing the heading, enabling capacitive touch, and/or contact sensing between finger tips.
1. A glove configured to be worn over a hand of a user, the glove comprising:
a plurality of electronic components including:
a plurality of inertial motion units (IMUs), each IMU located proximate to a hand section or a finger section of the glove and configured to generate one or more first signals indicative of a motion of the hand or a finger of the user, and
a plurality of reset sensors located proximate to a plurality of finger sections of the glove;
wherein the plurality of IMUs are configured to measure an acceleration and a rotational rate of one or more of the hand and fingers of the user;
wherein the plurality of reset sensors are configured to generate one or more second signals indicative of electrical contact between at least two of the plurality of reset sensors; and
logic configured to:
determine one or more movements of a joint of the hand of the user using the first signals,
determine one or more movements and headings of one or more fingers of the user using the first signals from at least two of the plurality of IMUs associated with the one or more fingers,
determine which of the one or more fingers are touching based on the one or more second signals; and
correct the headings of the touching fingers based on the one or more second signals.
2. The glove of claim 1 , wherein the glove excludes a magnetometer.
3. The glove of claim 1 , further comprising:
plurality of buses comprising:
a first bus including the first signals from at least two IMUs located in a first finger of the glove, and
a second bus including the first signals from at least two IMUs associated with a second finger of the glove,
wherein the determination of the one or more movements and headings of the one or more fingers of the user includes using differences in information between the first signals of the first bus and the first signals of the second bus.
4. The glove of claim 1 , further comprising:
a thumb section;
wherein each of the plurality of reset electrodes are located on a side of a finger section or a thumb section.
5. The glove of claim 4 , wherein one finger section includes only one electrode, and the thumb section includes only one electrode.
6. The glove of claim 1 , further comprising:
a thumb section;
wherein at least one force sensor is proximate to the thumb section and configured to determine whether a force is being applied to the thumb section of the glove.
7. The glove of claim 1 , further comprising:
a plurality of actuators configured to vibrate tips of at least one of the plurality of finger sections.
8. The glove of claim 1 , further comprising:
knitted material including one or more of the plurality of electronic components.
9. The glove of claim 8 , wherein the knitted material includes:
one or more first knitted material sections including a plurality of layers surrounding the one or more electronic components, and
one or more second knitted material sections including a single layer.
10. The glove of claim 8 , further comprising:
one or more conductive threads configured as knitted threads within the knitted material.
11. The glove of claim 1 , further comprising:
a plurality of microcontroller units (MCUs), wherein each IMU is coupled to a unique MCU.
12. The glove of claim 1 , wherein a number of the plurality of IMUs is greater than or equal to 16.
13. The glove of claim 1 , wherein the logic is included in an on-board controller.
14. The glove of claim 13 , the controller configured to:
compute an average of the headings of the touching fingers; and
set the headings of the touching fingers to the computed average.
15. The glove of claim 13 , the controller configured to:
determine an orientation of each of the touching fingers; and
determine whether to correct the headings of the touching fingers based on the orientations of each of the touching fingers.