Monitoring of vital body signals during movement
First Claim
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1. A method of monitoring respiration signals on a body of a human or animal, the method comprising:
- placing at least two tri-axial acceleration sensors on a sternum of said body with the at least two acceleration sensors separated by the point that separates the main body of the sternum and a manubrium in such a way that an angle change induced by said respiration signals differs between said at least two acceleration sensors,using said at least two acceleration sensors to measure respective acceleration vectors; and
retrieving said respiration signals by applying differential angle measurement to the acceleration vectors measured by said at least two acceleration sensors to extract said respiration signals.
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Abstract
In a multi-sensor system and method of monitoring vital body signals during movement of a body of a human or an animal, acceleration sensors are placed at body locations in such a way that an acceleration angle change induced by the vital body signals differs between the at least two acceleration sensors. The retrieval of the vital body signals is achieved by extracting a wanted vital body signal based on measurement results from multiple sensors that may be motion contaminated. Three retrieval schemes are proposed, each with preferred sensor locations that provide optimal performance of retrieving the vital body signal(s).
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Citations
12 Claims
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1. A method of monitoring respiration signals on a body of a human or animal, the method comprising:
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placing at least two tri-axial acceleration sensors on a sternum of said body with the at least two acceleration sensors separated by the point that separates the main body of the sternum and a manubrium in such a way that an angle change induced by said respiration signals differs between said at least two acceleration sensors, using said at least two acceleration sensors to measure respective acceleration vectors; and retrieving said respiration signals by applying differential angle measurement to the acceleration vectors measured by said at least two acceleration sensors to extract said respiration signals. - View Dependent Claims (2, 3, 4, 5)
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6. A method of monitoring respiration signals on a body of a human, the method comprising:
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placing two tri-axial acceleration sensors on top of a sternum of said body with the two acceleration sensors separated by the point that separates the main body of the sternum and a manubrium; using said two acceleration sensors to measure respective acceleration vectors; and retrieving said respiration signals by applying differential angle measurement to the acceleration vectors measured by said two acceleration sensors to extract said respiration signals. - View Dependent Claims (7, 8)
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9. A multi-sensor device for monitoring vital body respiration signals on a body of a human or animal, the device comprising:
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at least two acceleration sensors each adapted to measure an acceleration vector and adapted to be placed at predetermined locations on a sternum of said body with the at least two acceleration sensors separated by the point that separates the main body of the sternum and a manubrium in such a way that an angle change induced by said vital body respiration signals differs between said at least two acceleration sensors; and a signal extractor comprising a computer programmed to extract said vital body respiration signals by applying differential angle measurement to measurement results of said at least two acceleration sensors placed at the predetermined locations. - View Dependent Claims (10, 11, 12)
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Specification