Method and system for fall detection
First Claim
1. A method for fall detection, comprising:
- receiving measurement signals from a plurality of sensors to monitor user activities, the plurality of sensors including a motion sensor for collecting motion information and a biomedical sensor for collecting physiological information;
according to a signal processing sequence, determining whether the measurement signals meet multiple qualifying conditions for a fall incident;
when the measurement signals do not meet the multiple qualifying conditions, continuing to monitor the user activities; and
when the measurement signals meet the multiple qualifying conditions, determining that a fall incident has occurred, and sending an alert message to a designated contact;
wherein the multiple qualifying conditions include;
a condition evaluating at least the motion information, and a condition evaluating at least the physiological information,wherein the condition evaluating acceleration amplitude information of the device includes an amplitude threshold and a quantity threshold N, and the method further comprises;
obtaining M absolute values of amplitude readings in a gravity direction from the sensor by polling;
counting a number of absolute values that are below the amplitude threshold among the M amplitude readings, wherein M and N are preset positive integers and N is less than M;
determining whether the counted number is above the quantity threshold N; and
when the counted number is above the quantity threshold, determining that the condition evaluating the acceleration amplitude information of the device is satisfied.
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Accused Products
Abstract
The present disclosure provides a method and a system for fall detection. Measurement signals are received from a plurality of sensors to monitor user activities, the plurality of sensors including a motion sensor for collecting motion information and a biomedical sensor for collecting physiological information. According to a signal processing sequence, whether the measurement signals meet multiple qualifying conditions for a fall incident is determined. The multiple qualifying conditions include: a condition evaluating at least the motion information, and a condition evaluating at least the physiological information. The method further includes: when the measurement signals do not meet the multiple qualifying conditions, continuing to monitor the user activities; and when the measurement signals meet the multiple conditions, determining that a fall incident has occurred, and sending an alert message to a designated contact.
12 Citations
19 Claims
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1. A method for fall detection, comprising:
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receiving measurement signals from a plurality of sensors to monitor user activities, the plurality of sensors including a motion sensor for collecting motion information and a biomedical sensor for collecting physiological information; according to a signal processing sequence, determining whether the measurement signals meet multiple qualifying conditions for a fall incident; when the measurement signals do not meet the multiple qualifying conditions, continuing to monitor the user activities; and when the measurement signals meet the multiple qualifying conditions, determining that a fall incident has occurred, and sending an alert message to a designated contact; wherein the multiple qualifying conditions include;
a condition evaluating at least the motion information, and a condition evaluating at least the physiological information,wherein the condition evaluating acceleration amplitude information of the device includes an amplitude threshold and a quantity threshold N, and the method further comprises; obtaining M absolute values of amplitude readings in a gravity direction from the sensor by polling; counting a number of absolute values that are below the amplitude threshold among the M amplitude readings, wherein M and N are preset positive integers and N is less than M; determining whether the counted number is above the quantity threshold N; and when the counted number is above the quantity threshold, determining that the condition evaluating the acceleration amplitude information of the device is satisfied. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for fall detection, comprising:
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a plurality of sensors configured to collect measurement signals to monitor user activities, the plurality of sensors including a motion sensor for collecting motion information and a biomedical sensor for collecting physiological information; one or more processor configured to; receive the measurement signals from the plurality of sensors, according to a signal processing sequence, determine whether the measurement signals meet multiple qualifying conditions for a fall incident; when the measurement signals do not meet the multiple qualifying conditions, continue to monitor the user activities; and when the measurement signals meet the multiple qualifying conditions, determine that a fall incident has occurred, and a communication module configured to send an alert message to a designated contact when the fall incident has occurred; wherein the multiple qualifying conditions include;
a condition evaluating at least the motion information, and a condition evaluating at least the physiological information,wherein the condition evaluating acceleration amplitude information of the device includes an amplitude threshold and a quantity threshold N, and the one or more processor is configured to; obtain M absolute values of amplitude readings in a gravity direction from the sensor by boning; count a number of absolute values that are below the amplitude threshold among the M amplitude readings, wherein M and N are preset positive integers and N is less than M; determine whether the counted number is above the quantity threshold N; and when the counted number is above the quantity threshold, determine that the condition evaluating the acceleration amplitude information of the device is satisfied. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A device for fall detection, comprising:
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a sensor configured to collect measurement signals to monitor user activities, the sensor being a motion sensor for collecting motion information; a processor configured to; receive the measurement signals from the sensor, according to a signal processing sequence, determine whether the measurement signals meet multiple qualifying conditions for a fall incident; when the measurement signals do not meet the multiple qualifying conditions, continue to monitor the user activities; and when the measurement signals meet the multiple qualifying conditions, determine that a fall incident has occurred, and a communication module configured to send an alert message to a designated contact when the fall incident has occurred; wherein the multiple qualifying conditions include;
a condition evaluating acceleration amplitude information of the device, and a condition evaluating a reverse impact of the device;wherein; the sensor is further configured to determine a measurement signal reaches an amplitude threshold, and generate an interrupt to wake the processor from a sleep mode to an active mode; and the processor is further configured to; in the active mode, receive the measurement signals from the sensor, according to the signal processing sequence, determine whether the measurement signals meet a first condition in the multiple qualifying conditions in a first time duration corresponding to the first condition; when the first time duration is not passed and the first condition is met, determine whether the measurement signals meet a second condition in the multiple qualifying conditions in a second time duration corresponding to the second condition according to the signal processing sequence; when the first time duration is not passed and the first condition is not met, continue to determine whether the measurement signals meet the first condition; and when the first time duration is passed and the first condition is not met, enter the sleep mode. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification