Detecting system and mobile electronic apparatus, and method for detecting physiological characteristic thereof method thereof
First Claim
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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Abstract
A detecting system, a mobile electronic apparatus and a method for detecting a physiological characteristic thereof are provided. The mobile electronic apparatus includes a sensor unit, a PPG photoplethysmography (PPG) sensor, and a processing unit. The sensor unit has a first, second, and third sensing electrodes. The PPG sensor senses a PPG signal. The processing unit is coupled to the sensor unit and the PPG sensor. When the first and second sensing electrodes detect a voltage difference above a threshold, the PPG sensor is triggered to detect blood volume changes, and when the third sensing electrode is triggered to detect electrical activity of a heart between the first and third sensing electrodes, the PPG sensor is disabled by the processing unit.
15 Citations
16 Claims
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1. A mobile electronic apparatus, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A detecting system, comprising:
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a mobile electronic apparatus, comprises; 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 electrode 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 of a heart 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; and a wireless host, coupled to the mobile electronic apparatus wirelessly to receive an information related to physiological characteristic from the mobile electronic apparatus. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for detecting a physiological characteristic, comprising:
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detecting a voltage difference over a first and second sensing electrodes of a sensor unit, the first and second sensing electrodes respectively receive a first and second sensed signal, each of the first sensed signal and the second sensed signal has a plurality of characteristic points; comparing 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; triggering a photoplethysmography (PPG) sensor to detect blood volume changes when the voltage difference is above a threshold; and disabling the PPG sensor when a third sensing electrode of the sensor unit is triggered to detect electrical activity between the first and third sensing electrodes, wherein the electrical activity between the first and third sensing electrodes is a third sensed signal, wherein when the PPG sensor is not disabled, decompose the PPG signal into intrinsic mode function (IMF) modes and remove a mode signal that is most alike to the motion signal, when the PPG sensor is disabled, decompose the third sensed signal into IMF modes and remove the mode signal most alike to the motion signal. - View Dependent Claims (16)
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Specification