Gesture control for monitoring vital body signs
First Claim
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1. An apparatus for controlling a sensor device which uses a movement sensor, said apparatus comprising:
- a gesture detector for evaluating an acceleration output of said movement sensor to detect at least one predetermined gesture, wherein the acceleration output is indicative of a movement sensed by the movement sensor; and
a device controller for controlling a functional operation of said sensor device in response to a detection output of said gesture detector,wherein said gesture detector is adapted to perform;
obtaining two one-dimensional signal components from said acceleration output, including a first one-dimensional signal component and a second one-dimensional signal component, wherein the second one-dimensional signal component is obtained after the first one-dimensional signal component, and the first one-dimensional signal component and the second one-dimensional signal component include a peak indicative of the sensed movement;
estimating a first background level from the first one-dimensional signal component, wherein the first background level is indicative of a sensed non-tap movement background activity in the first one-dimensional signal component, wherein the sensed non-tap movement background activity is due to a user movement;
estimating a second background level from the second one-dimensional signal component, wherein the second background level is indicative of the sensed non-tap movement background activity in the second one-dimensional signal component;
comparing the first one-dimensional signal component with a first threshold, the second one-dimensional signal component with the first threshold, the first background level with a second threshold, and the second background level with the second threshold; and
detecting a candidate double tap if, based on the comparisons, the first one-dimensional signal component surpasses the first threshold, the second one-dimensional signal component surpasses the first threshold, the first background level is below the second threshold, and the second background level is below the second threshold.
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Abstract
The present invention reuses an accelerometer, or, more precise, sensed accelerations of a body sensor for user control of the body sensor. This is achieved by detecting predefined patterns in the acceleration signals that are unrelated to other movements of the patient. These include tapping on/with the sensor, shaking, and turning the sensor. New procedures are described that make it possible to re-use the acceleration sensing for reliable gesture detection without introducing many false positives due to non-gesture movements like respiration, heart beat, walking, etc.
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Citations
19 Claims
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1. An apparatus for controlling a sensor device which uses a movement sensor, said apparatus comprising:
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a gesture detector for evaluating an acceleration output of said movement sensor to detect at least one predetermined gesture, wherein the acceleration output is indicative of a movement sensed by the movement sensor; and a device controller for controlling a functional operation of said sensor device in response to a detection output of said gesture detector, wherein said gesture detector is adapted to perform; obtaining two one-dimensional signal components from said acceleration output, including a first one-dimensional signal component and a second one-dimensional signal component, wherein the second one-dimensional signal component is obtained after the first one-dimensional signal component, and the first one-dimensional signal component and the second one-dimensional signal component include a peak indicative of the sensed movement; estimating a first background level from the first one-dimensional signal component, wherein the first background level is indicative of a sensed non-tap movement background activity in the first one-dimensional signal component, wherein the sensed non-tap movement background activity is due to a user movement; estimating a second background level from the second one-dimensional signal component, wherein the second background level is indicative of the sensed non-tap movement background activity in the second one-dimensional signal component; comparing the first one-dimensional signal component with a first threshold, the second one-dimensional signal component with the first threshold, the first background level with a second threshold, and the second background level with the second threshold; and detecting a candidate double tap if, based on the comparisons, the first one-dimensional signal component surpasses the first threshold, the second one-dimensional signal component surpasses the first threshold, the first background level is below the second threshold, and the second background level is below the second threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification