Apparatus and method for estimating bio-information

An electronic device comprising an apparatus for estimating bio-information, and an output device configured to output a processing result of the apparatus for estimating the bio-information,

• wherein the apparatus for estimating the bio-information comprises:
• a first sensor configured to emit a first wavelength to an object and measure a first pulse wave signal of the first wavelength from the object, and further configured to emit a second wavelength to the object and measure a second pulse wave signal of the second wavelength from the object;
• a second sensor configured to measure at least one of a force or a pressure applied to the object;
• and
• a processor configured to:
• generate an oscillometric waveform envelope based on the first pulse wave signal of the first wavelength and the at least one of the force or the pressure applied to the object;
• obtain a feature value from the oscillometric waveform envelope;
• predict a size of a measured blood vessel based on the second pulse wave signal of the second wavelength, the processor using the second pulse wave signal to compensate for contact position between a target blood vessel and the measured blood vessel irradiated by the first sensor;
• correct the feature value based on the size of the measured blood vessel and relative position of the measured blood vessel and target blood vessel;
• estimate the bio-information based on correcting the feature value;
• and
• providing at least one of an audio output and a visual output of the estimated bio-information comprising blood pressure,
• wherein the first wavelength is an infrared wavelength, and the second wavelength is a green wavelength,
• wherein the processor is further configured to
• detect a characteristic point from the oscillometric waveform envelope;
• and
• obtain the feature value based on the characteristic point,
• wherein the processor is further configured to
• extract a direct current (DC) component of the second pulse wave signal of the second wavelength;
• and
• predict the size of the measured blood vessel based on the extracted DC component value, the extracted DC component of the second pulse wave signal corresponding to the force value or the pressure value of the characteristic point;
• and
• update a bio-information estimation model for estimating the bio-information based on the corrected feature value.

An apparatus for estimating blood pressure of a user, the apparatus comprising:

• a first sensor configured to emit a first wavelength to an object and measure a first pulse wave signal of an infrared wavelength and further configured to emit a second wavelength to the object and measure a second pulse wave signal of a green wavelength from the object of the user, the second pulse wave signal compensating for contact position between a target blood vessel and a measured blood vessel irradiated by the first sensor;
• a second sensor configured to measure at least one of a force or a pressure applied to the object of the user;
• and
• a processor configured to:
• generate an oscillometric waveform envelope based on the first pulse wave signal of the infrared wavelength and the at least one of the force or the pressure applied to the object;
• obtain a feature value from the oscillometric waveform envelope;
• correct the feature value based on the second pulse wave signal of the second wavelength;
• estimate the blood pressure of the user based on correcting the feature value;
• and
• an output device providing at least one of an audio output and a visual output of the estimated bio-information comprising blood pressure;
• and
• an output device providing at least one of an audio output and a visual output of the estimated bio-information comprising one or more of a blood pressure, an aortic pressure waveform, a vascular compliance, and a stress index,
• wherein the first wavelength is an infrared wavelength, and the second wavelength is a green wavelength,
• wherein the processor is further configured to
• detect a characteristic point from the oscillometric waveform envelope;
• and
• obtain the feature value based on the characteristic point,
• wherein the processor is further configured to
• extract a direct current (DC) component of the second pulse wave signal of the second wavelength;
• and
• predict the size of the measured blood vessel based on the extracted DC component of the second pulse wave signal which corresponds to the force value or the pressure value of the characteristic point;
• and
• update a bio-information estimation model for estimating the bio-information based on the corrected feature value.