Method and system for classifying state of a wearable device
AssigneeInvenSense, Inc.
InventorJoe Youssef
Life of this patent
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Abstract
Methods and systems are disclosed for employing an ultrasonic sensor to classify the state of a wearable device. Ultrasonic pulses are emitted from a pair of ultrasonic transducers. The pair of ultrasonic transducers are in a line of sight relationship when the user is in a first state with respect to the wearable device and are not in a line of sight relationship when the user is in a second state with respect to the wearable device. The returned signals are evaluated and the state of the wearable device is classified as being one of the first state and the second state based at least in part on the evaluation.
Claims22
A wearable device configured to be fitted to a user, comprising:
- a pair of ultrasonic transducers, each transducer configured to emit ultrasonic pulses and receive returned signals corresponding to the emitted ultrasonic pulses;
- wherein the pair of ultrasonic transducers have predetermined positions with respect to the wearable device;
- wherein the pair of ultrasonic transducers are in a line of sight relationship when the user is in a first state with respect to the wearable device,
- wherein the pair of ultrasonic transducers are not in a line of sight relationship when the user is in a second state with respect to the wearable device, and
- wherein the pair of ultrasonic transducers are configured to alternately emit ultrasonic pulses;
- and
- at least one processor coupled with the pair of ultrasonic transducers and configured to:
- evaluate the returned signals;
- and
- based at least in part on the evaluation, classify the state of the wearable device as being one of the first state and the second state.
At least one sensor processing unit comprising:
- a pair of ultrasonic transducers, each transducer configured to emit ultrasonic pulses and receive returned signals corresponding to the emitted ultrasonic pulses;
- wherein the pair of ultrasonic transducers have predetermined positions with respect to a wearable device configured to be fitted to a user;
- wherein the pair of ultrasonic transducers are in a line of sight relationship when the user is in a first state with respect to the wearable device,
- wherein the pair of ultrasonic transducers are not in a line of sight relationship when the user is in a second state with respect to the wearable device, and
- wherein the pair of ultrasonic transducers are configured to alternately emit ultrasonic pulses;
- and
- at least one sensor processor coupled with the pair of ultrasonic transducers and configured to:
- evaluate the returned signals;
- and
- based at least in part on the evaluation, classify the state of the wearable device as being one of the first state and the second state.
A method for classifying state of a wearable device, wherein the wearable device is configured to be fitted to a user, comprising:
- alternately emitting ultrasonic pulses from a pair of ultrasonic transducers, each transducer configured to emit ultrasonic pulses and receive returned signals corresponding to the emitted ultrasonic pulses;
- wherein the pair of ultrasonic transducers have predetermined positions with respect to the wearable device;
- wherein the pair of ultrasonic transducers are in a line of sight relationship when the user is in a first state with respect to the wearable device,
- wherein the pair of ultrasonic transducers are not in a line of sight relationship when the user is in a second state with respect to the wearable device;
- evaluating retuned signals received by the pair of ultrasonic transducers;
- and
- classifying the state of the wearable device as being one of the first state and the second state based at least in part on the evaluation.
Dependencies are inferred from the claim text.