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Detecting system and mobile electronic apparatus, and method for detecting physiological characteristic thereof method thereof

  • US 10,178,975 B2
  • Filed: 03/19/2015
  • Issued: 01/15/2019
  • Est. Priority Date: 03/19/2015
  • Status: Active Grant
First Claim
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1. A mobile electronic apparatus, comprising:

  • a sensor unit, having a first, second, and third sensing electrodes, the first, second and third sensing electrodes respectively receive a first, second and third sensed signal, each of the first sensed signal, the second sensed signal and the third sensed signal has a plurality of characteristic points;

    a photoplethysmography (PPG) sensor, sensing a PPG signal; and

    a processing unit, coupled to the sensor unit and the PPG sensor, and configured to compare voltage levels of one of the plurality of characteristic points on the first sensed signal and a corresponding characteristic points on the second sensed signal to obtain a motion signal,wherein when a voltage difference between a signal sensed by the first sensing electrode and a signal sensed by the second sensing electrodes is above a threshold, the PPG sensor is triggered to detect blood volume changes, when the processing unit triggers the third sensing electrode to detect electrical activity between the first and third sensing electrodes, the PPG sensor is disabled by the processing unit,wherein when the PPG sensor is not disabled by the processing unit, the processing unit decomposes the PPG signal into intrinsic mode function (IMF) modes and removes a mode signal that is most alike to the motion signal, when the PPG sensor is disabled by the processing unit, the processing unit decomposes the third sensed signal into IMF modes and removes the mode signal most alike to the motion signal.

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