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US 11,633,115 B2Granted
Apparatus and method for estimating bio-information
AssigneeSamsung Electronics Co., Ltd.
InventorsJae Min Kang, Yong Joo Kwon, Youn Ho Kim, Sang Yun Park, Jin Woo Choi
Life of this patent
Estimating the term…
Abstract
An apparatus for estimating bio-information according to an embodiment includes: a sensor that measures a pulse wave signal from an object and contact pressure of the object; and a processor that obtains an oscillometric envelope based on an amplitude of the pulse wave signal and the contact pressure, and estimates bio-information based on a center of mass of a phase of contact pressure of the obtained oscillometric envelope.
Claims20
An apparatus for estimating bio-information, the apparatus comprising:
- a pulse wave sensor configured to measure a pulse wave signal from an object during a measurement period;
- a contact pressure sensor configured to measure contact pressure of the object during the measurement period;
- and
- a processor configured to:
- extract a peak-to-peak amplitude of the pulse wave signal of each measurement time during the measurement period by subtracting an amplitude value of a negative (−) point from an amplitude value of a positive (+) point of a waveform envelope of the pulse wave signal corresponding to the each measurement time;
- obtain an oscillometric envelop by plotting the extracted peak-to-peak amplitude of the pulse wave signal with respect to the contact pressure at the each measurement time;
- determine a first contact pressure value and a second contact pressure value on the oscillometric envelope, each of the first contact pressure value and the second contact pressure value corresponding to a predetermined percentage of a maximum amplitude value of the oscillometric envelope;
- obtain a third contact pressure value corresponding to a center of mass of a region between the first contact pressure value and the second contact pressure value on the oscillometric envelope based on a weighted mean of the region;
- estimate the bio-information based on the third contact pressure value, and
- output a notification in real-time based on the estimated bio-information.
7 more elements
A method of estimating bio-information, the method comprising:
- obtaining, by a pulse wave sensor, a pulse wave signal from an object during a measurement period;
- obtaining, by a contact pressure sensor, contact pressure of the object during the measurement period;
- extracting a peak-to-peak amplitude of the pulse wave signal of each measurement time during the measurement period, by subtracting an amplitude value of a negative (−) point from an amplitude value of a positive (+) point of a waveform envelope of the pulse wave signal corresponding to the each measurement time;
- obtaining an oscillometric envelope by plotting the extracted peak-to-peak amplitude of the pulse wave signal with respect to the contact pressure at the each measurement time;
- determining a first contact pressure value and a second contact pressure value on the oscillometric envelope, each of the first contact pressure value and the second contact pressure value corresponding to a predetermined percentage of a maximum amplitude value of the oscillometric envelope;
- obtaining a third contact pressure value corresponding to a center of mass of a region between the first contact pressure value and the second contact pressure value on the oscillometric envelope based on a weighted mean of the region;
- estimating bio-information based on the third contact pressure value;
- and
- outputting a notification in real-time based on the estimated bio-information.
6 more elements
Dependencies are inferred from the claim text.