Fall detection system
First Claim
1. A fall detection system, comprising:
- a sensor module to be worn by a user in an arbitrary orientation, for collecting motion data based on the user'"'"'s motion;
first evaluation logic for identifying a potential fall incident on a basis of an impact observed in said motion data;
second evaluation logic for verifying that the sensor module is actually worn by the user, at least around the time of said impact, the second evaluation logic comprising;
free fall detection logic for evaluating the motion data on characteristics which are typical for a free falling object and arranged to derive whether the potential fall incident corresponds to a fall of the user or a fall of the sensor module independent of the user.
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Abstract
The invention relates to a fall detection system, for detecting human fall incidents. The detection system comprises a sensor module to be worn by a user, for collecting motion data of his body, for instance acceleration data; first evaluation logic for identifying a potential fall incident on the basis of an impact observed in the acceleration data; and second evaluation logic for verifying that the sensor module is actually worn by the user, at least around the time of said impact, to prevent the system from raising an alarm if only the sensor module has fallen. The second evaluation logic may comprise free fall detection means for evaluating the acceleration data on characteristics which are typical for a free falling object, such as one or more full rotation and/or a free falling phase, during which the magnitude of the acceleration data is relatively stable and small. Additionally or alternatively the second evaluation logic may comprise body proximity detection means for detecting whether the sensor module is in close proximity to the human body.
35 Citations
21 Claims
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1. A fall detection system, comprising:
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a sensor module to be worn by a user in an arbitrary orientation, for collecting motion data based on the user'"'"'s motion; first evaluation logic for identifying a potential fall incident on a basis of an impact observed in said motion data; second evaluation logic for verifying that the sensor module is actually worn by the user, at least around the time of said impact, the second evaluation logic comprising; free fall detection logic for evaluating the motion data on characteristics which are typical for a free falling object and arranged to derive whether the potential fall incident corresponds to a fall of the user or a fall of the sensor module independent of the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A fall detection system, comprising:
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a sensor module configured to be worn by a user for collecting motion data based on motion of the user; and an evaluation unit, including logic to; identify the sensor module falling on a basis of said motion data, differentiate between the user falling while wearing the sensor module and the sensor module falling independent of the user in a free fall based on the motion data, and generate an alarm in response to the sensor module falling while being worn by the user and generate no alarm in response to the sensor module free falling. - View Dependent Claims (18)
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19. A fall detection system, comprising:
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a sensor module to be worn by a user for collecting motion data based on the user'"'"'s motion; evaluation logic identifying a potential fall incident on a basis of an impact observed in said motion data, verifying that the sensor module is currently worn by the user, at least around the time of said impact, and deriving whether the potential fall incident corresponds to a fall of the user or a fall of the sensor module independent of the user, the evaluation logic further including; an averaging circuit which averages acceleration data obtained from the sensor module over a time interval, the time interval being decreased in response to at least one of detecting a potential fall incident and a change in an orientation of the sensor module. - View Dependent Claims (20, 21)
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Specification