Method and system for fall detection

A system for fall detection, comprising:

• 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.

A device for fall detection, comprising:

• 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.