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Gesture control for monitoring vital body signs

  • US 9,898,182 B2
  • Filed: 12/14/2011
  • Issued: 02/20/2018
  • Est. Priority Date: 12/17/2010
  • Status: Active Grant
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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