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US 7,141,026 B2Granted
Body movement monitoring system and method
AssigneeEcole Polytechnique Federale de Lausanne/ Service des Relations Industrielles (SRI)
InventorsKamiar Aminian, Bijian Najjafi
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Abstract
The present invention relates to a system and a method for monitoring body movement, in particular but not exclusively for evaluating the falling risk and/or for monitoring sitting, standing, lying, walking and running periods. The system is characterized by the fact that it comprises means for determining the time of postural transition.
Claims10
A body movement monitoring system comprising:
- a sensor to be attached to a trunk of a subject,
- processing means for deriving information from said sensor,
- display means for displaying said information to an operator,
- wherein said system includes means for determining the time of postural transition by calculating a trunk tilt θ by integrating an angular rate signal measured by said sensor, calculating sin θ, and obtaining the postural transition corresponding to the minimum peak of sin θ.
1 more element
A method for measuring the time of postural transition comprising:
- attaching a sensor to a trunk of a subject,
- processing information from said sensor,
- displaying said information to an operator,
- determining the time when a postural transition occurs, wherein a trunk tilt θ is first calculated by integrating an angular rate signal measured by said sensor, sin θ is then calculated, and the postural transition corresponds to the minimum peak of sin θ.
1 more element
Dependencies are inferred from the claim text.