Personal system for the detection of a fall or a fall prone situation

A method for preventing and detecting a fall of an individual and implementing a system worn by the individual and comprising a plurality of sensors and an alarm, the plurality of sensors comprising:

• a triaxial accelerometer;
• and
• a barometric sensor;
• wherein each sensor of the plurality of sensors generates a first signal, and is connected to a microprocessor configured to execute a computer program stored in a memory to collect and analyze data issued by the plurality of sensors, and to trigger the alarm in response to an analysis of the data;
• wherein a second signal from the triaxial accelerometer is acquired and processed to derive a walking pace parameter, a sit to stand parameter, and an acceleration magnitude over three axes of the triaxial accelerometer;
• the method comprising:
• computing a first composite index based on the walking pace parameter and the sit to stand parameter;
• and
• generating a first type of the alarm in response to a determination that the first composite index exceeds a first predetermined threshold;
• acquiring a third signal of the barometric sensor;
• computing a second composite index based on:
• the acceleration magnitude combined along the three axes of the triaxial accelerometer;
• a variance of the acceleration magnitude over a predetermined duration;
• an acceleration component over an axis of the three axes of the triaxial accelerometer parallel to gravity;
• the acceleration magnitude combined over the three axes of the triaxial accelerometer in a plane perpendicular to the gravity;
• and
• a variation of a barometric pressure between two moments of the barometric sensor;
• and
• generating a second type of the alarm corresponding to the detection of the fall in response to a determination that the second composite index exceeds a second predetermined threshold.