Fall detection system using a combination of accelerometer, audio input and magnetometer
First Claim
1. An apparatus wearable by a user for detecting a user state, comprising:
- an accelerometer for measuring an acceleration of the user;
a magnetometer for measuring a magnetic field associated with the user and calculation of an orientation of the user based on a measured magnetic field;
a microphone for receiving audio;
a memory for storing the audio; and
at least one processor communicatively connected to the accelerometer, the magnetometer, the microphone, and the memory, and configured to;
identify a measured acceleration and a change of orientation of the user as a suspected user state;
extract at least one feature from the stored audio and at least one of the measured acceleration and the change of orientation, where the at least one feature is an inter-signal dynamic property that is based on relationships between audio energy and physical movement, and the inter-signal dynamic property is one of elapsed time between acceleration and audio peaks and acceleration and rotation rate peaks;
categorize the suspected user state based on the at least one feature as one of an activity of daily life (ADL), a confirmed user state indicating that a fall has occurred, and an inconclusive event;
transmit the stored audio and at least one of the measured acceleration and the change of orientation to the cloud computing system; and
receive a re-confirmation or change of classification from the cloud computing system based on the stored audio and at least one of the measured acceleration and the change of orientation.
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Accused Products
Abstract
A wearable device for detecting a user state is disclosed. The wearable device includes an accelerometer for measuring an acceleration of a user, a magnetometer for measuring a magnetic field associated with the user'"'"'s change of orientation, a microphone for receiving audio, a memory for storing the audio, and at least one processor communicatively connected to the accelerometer, the magnetometer, the microphone, and the memory. The processor is identified to declare a measured acceleration as a suspected user state, and to categorize the suspected user state based on the stored audio as one of an activity of daily life (ADL), a confirmed user state, or an inconclusive event.
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Citations
18 Claims
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1. An apparatus wearable by a user for detecting a user state, comprising:
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an accelerometer for measuring an acceleration of the user; a magnetometer for measuring a magnetic field associated with the user and calculation of an orientation of the user based on a measured magnetic field; a microphone for receiving audio; a memory for storing the audio; and at least one processor communicatively connected to the accelerometer, the magnetometer, the microphone, and the memory, and configured to; identify a measured acceleration and a change of orientation of the user as a suspected user state; extract at least one feature from the stored audio and at least one of the measured acceleration and the change of orientation, where the at least one feature is an inter-signal dynamic property that is based on relationships between audio energy and physical movement, and the inter-signal dynamic property is one of elapsed time between acceleration and audio peaks and acceleration and rotation rate peaks; categorize the suspected user state based on the at least one feature as one of an activity of daily life (ADL), a confirmed user state indicating that a fall has occurred, and an inconclusive event; transmit the stored audio and at least one of the measured acceleration and the change of orientation to the cloud computing system; and receive a re-confirmation or change of classification from the cloud computing system based on the stored audio and at least one of the measured acceleration and the change of orientation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer implemented method performed by an apparatus wearable by a user for detecting a fall of a user, comprising:
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measuring an acceleration of the user; measuring a magnetic field associated with the user and calculating of an orientation of the user based on a measured magnetic field; receiving and storing audio; identifying, by a processor, a measurement of acceleration and a change of orientation of the user as a suspected fall; extracting at least one feature from the stored audio and at least one of the measured acceleration and the change of orientation, where the at least one feature is an inter-signal dynamic property that is based on relationships between audio energy and physical movement, and the inter-signal dynamic property is one of elapsed time between acceleration and audio peaks and acceleration and rotation rate peaks; categorizing, by the processor, the suspected fall based on the at least one feature as one of an activity of daily life (ADL), a confirmed fall, and an inconclusive event; transmitting the stored audio and at least one of the measured acceleration and the change of orientation to a cloud computing system; and receiving a re-confirmation or change of classification from the cloud computing system based on the stored audio and at least one of the measured acceleration and the change of orientation. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A non-transitory computer readable storage medium including instructions that, when executed by a processor included in an apparatus wearable by a user, cause the processor to perform operations comprising:
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measuring an acceleration of the user; measuring a magnetic field associated with the user and calculating of an orientation of the user based on a measured magnetic field; receiving and storing audio; identifying, by the processor, a measurement of acceleration and a change of orientation of the user as a suspected fall; extracting at least one feature from the stored audio and at least one of the measured acceleration and the change of orientation, where the at least one feature is an inter-signal dynamic property that is based on relationships between audio energy and physical movement, and the inter-signal dynamic property is one of elapsed time between acceleration and audio peaks and acceleration and rotation rate peaks; categorizing, by the processor, the suspected fall based on the at least one feature as one of an activity of daily life (ADL), a confirmed fall, and an inconclusive event; transmitting the stored audio and at least one of the measured acceleration and the change of orientation to a cloud computing system; and receiving a re-confirmation or change of classification from the cloud computing system based on the stored audio and at least one of the measured acceleration and the change of orientation. - View Dependent Claims (18)
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Specification