Apparatus for measuring body fat and method thereof
First Claim
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1. A method of measuring body fat of a user, the method comprising:
- measuring a first impedance of the user by using a 4-point measuring method, wherein the measuring of the first impedance comprises applying, by a current source, a constant current through two first electrodes among four electrodes while measuring, by a voltage meter, a voltage across two second electrodes among the four electrodes;
measuring a second impedance of the user by using a 2-point measuring method, wherein the measuring of the second impedance comprises respectively connecting the two first electrodes to the two second electrodes via measuring method changing switches, to form two electrodes and measuring the second impedance by using the two formed electrodes;
determining a bio-impedance of the user based on the first impedance and the second impedance, and by closing a first switch and opening a second switch to transmit a value of the first impedance to a look-up table via the first switch while the 4-point, measuring method is performed, and opening the first switch and closing the second switch to transmit a value of the second impedance to the look-up table via the second switch while the 2-point measuring method is performed; and
determining a body fat percentage of the user by using the bio-impedance and body information of the user, wherein the first switch is disposed between the look-up table and an impedance measuring circuit that includes the current source, the voltage meter, and the measuring method changing switches, andwherein the second switch is disposed between the look-up table and the impedance measuring circuit, and connected in parallel with the first switch.
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Abstract
Provided is a method of measuring body fat of a user, the method including: measuring a first impedance by using a 4-point measuring method; measuring a second impedance by using a 2-point measuring method; determining a bio impedance by using the first impedance and the second impedance; and determining a body fat percentage by using the bio impedance and body information of the user.
15 Citations
19 Claims
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1. A method of measuring body fat of a user, the method comprising:
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measuring a first impedance of the user by using a 4-point measuring method, wherein the measuring of the first impedance comprises applying, by a current source, a constant current through two first electrodes among four electrodes while measuring, by a voltage meter, a voltage across two second electrodes among the four electrodes; measuring a second impedance of the user by using a 2-point measuring method, wherein the measuring of the second impedance comprises respectively connecting the two first electrodes to the two second electrodes via measuring method changing switches, to form two electrodes and measuring the second impedance by using the two formed electrodes; determining a bio-impedance of the user based on the first impedance and the second impedance, and by closing a first switch and opening a second switch to transmit a value of the first impedance to a look-up table via the first switch while the 4-point, measuring method is performed, and opening the first switch and closing the second switch to transmit a value of the second impedance to the look-up table via the second switch while the 2-point measuring method is performed; and determining a body fat percentage of the user by using the bio-impedance and body information of the user, wherein the first switch is disposed between the look-up table and an impedance measuring circuit that includes the current source, the voltage meter, and the measuring method changing switches, and wherein the second switch is disposed between the look-up table and the impedance measuring circuit, and connected in parallel with the first switch. - View Dependent Claims (2, 3, 4)
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5. A body fat analyzer comprising:
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a plurality of electrodes configured to contact a user, the plurality of electrodes comprising two first electrodes and two second electrodes; an impedance measurer configured to measure a first impedance by applying a constant current through the two first electrodes while measuring a voltage across the two second electrodes and measure a second impedance by respectively connecting the two first electrodes to the two second electrodes to form two electrodes and measuring the second impedance by using the two formed electrodes; a bio-impedance determiner configured to determine a bio-impedance based on the first impedance and the second impedance, and by closing a first switch and opening a second switch to transmit a value of the first impedance to a look-up table via the first switch while the first impedance is measured, and opening the first switch and closing the second switch to transmit a value of the second impedance to the look-up table via the second switch while the second impedance is measured; and a body fat determiner configured to determine a body fat percentage by using the bioimpedance and body information of the user, wherein the first switch is disposed between the impedance measurer and the look-up table, and wherein the second switch is disposed between the impedance measurer and the look-up table and connected in parallel with the first switch. - View Dependent Claims (6, 7, 8, 9)
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10. A body fat analyzer comprising:
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a plurality of electrodes that come in contact with a user when the user wears the body fat analyzer, the plurality of electrodes comprising four first electrodes and two second electrodes; an impedance measurer configured to measure a first impedance by applying a constant current through two electrodes among the four first electrodes while measuring a voltage across the other two electrodes among the four first electrodes and measure a second impedance by using the two second electrodes; a bio-impedance determiner configured to determine a bio-impedance based on the first impedance and the second impedance, and by closing a first switch and opening a second switch to transmit a value of the first impedance to a look-up table via the first switch while the first impedance is measured, and opening the switch and closing the second switch to transmit a value of the second impedance to the look-op table via the second switch while the second impedance is measured; and a body fat determiner configured to determine a body fat percentage by using the bioimpedance and body information, wherein the first switch is disposed between the impedance measurer and the look-up table, and wherein the second switch is disposed between the impedance measurer and the look-up table and connected in parallel with the first switch.
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11. A device for measuring body fat, the device comprising:
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an impedance measurer configured to measure a first body impedance by applying a constant current through two electrodes among a plurality of first electrodes while measuring a voltage across another two electrodes among the plurality of first electrodes and measure a second body impedance using a plurality of second electrodes; a bio-impedance determiner configured to determine a bio-impedance of a user based on the first body impedance and the second body impedance, and by closing a first switch and opening a second switch to transmit a value of the first impedance to a look-up table via the first switch while the first impedance is measured, and opening the first switch and closing the second switch to transmit a value of the second impedance to the look-up table via the second switch while the second impedance is measured; and a body fat determiner configured to determine a body fat percentage of the user based on the determined bio-impedance and body information of the user; wherein the first switch is disposed between the impedance measurer and the look-up table, and wherein the second switch is disposed between the impedance measurer and the look-up table and connected in parallel with the first switch. - View Dependent Claims (12)
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13. A method of measuring body fat of a user comprising:
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measuring a first impedance of the user by applying a constant current from a current source to two electrodes among a first number of first electrodes while measuring, by a voltage meter, a voltage across another two electrodes among the first number of first electrodes; measuring a second impedance of the user using a second number of electrodes; determining a bio-impedance of the user based on the first and second impedances, and by closing a first switch and opening a second switch to transmit a value of the first impedance to a look-up table via the first switch while the first impedance is measured, and opening the first switch and closing the second switch to transmit a value of the second impedance to the look-up table via the second switch while the second impedance is measured; and determining the body fat of the user using the bio-impedance and body information of the user, wherein the first switch is disposed between the look-up table and an impedance measuring circuit that includes the current source and the voltage meter, and wherein the second switch is disposed between the look-up table and the impedance measuring circuit, and connected in parallel with the first switch. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification