Apparatus and method for measuring bioelectrical impedance and apparatus and method for measuring biometric information

    公开(公告)号:US10959641B2

    公开(公告)日:2021-03-30

    申请号:US15878881

    申请日:2018-01-24

    Abstract: An apparatus for measuring bioelectrical impedance includes a current source configured to apply a constant current to an object through a first electrode and a second electrode; a measurement mode switcher configured to switch a measurement mode from a first measurement mode to a second measurement mode in response to a measurement mode switch signal; a voltmeter configured to obtain a voltage applied to a third electrode and a fourth electrode due to the constant current applied to the object; and a processor configured to obtain first impedance based on a first voltage obtained by the voltmeter immediately before start of a measurement mode switch, obtain second impedance based on a second voltage obtained by the voltmeter immediately after completion of the measurement mode switch, and obtain bioelectrical impedance of the object based on the first impedance and the second impedance.

    Wrist-wearable body composition measuring device and body composition measuring method using the same

    公开(公告)号:US10292614B2

    公开(公告)日:2019-05-21

    申请号:US14660335

    申请日:2015-03-17

    Abstract: A wrist-wearable body composition measuring device includes a main body; a strap connected to the main body; a first input electrode and a first output electrode which are provided on an inner surface of the strap and configured to contact a wrist of a subject; a second input electrode and a second output electrode which are provided on an outer surface of the strap; a measuring unit configured to measure a body impedance of the subject by applying current to the first input electrode and the second input electrode and detecting a voltage generated between the first output electrode and the second output electrode in response to the applied current; and a processor configured to analyze a body composition of the subject based on the body impedance measured by the measuring unit.

    Apparatus for obtaining biological information

    公开(公告)号:US11612333B2

    公开(公告)日:2023-03-28

    申请号:US17832188

    申请日:2022-06-03

    Abstract: An apparatus for obtaining bio information includes: a first electrode portion including a current electrode and a voltage electrode arranged to contact a first body portion of a subject; a second electrode portion including a current electrode and a voltage electrode arranged to contact a second body portion of the subject; and a measuring unit configured to measure a bio impedance of the subject by applying a current to the current electrodes of the first and second electrode portions and detecting a voltage at the voltage electrodes of the first and second electrode portions. In order to decrease errors of a measured bio impedance, contact resistances of the first and second body portions of the subject contacting the current electrode and the first and second body portions of the subject contacting the voltage electrode are different from each other, for at least one of the first and second electrode portions.

    Apparatus for obtaining biological information

    公开(公告)号:US11375917B2

    公开(公告)日:2022-07-05

    申请号:US14966053

    申请日:2015-12-11

    Abstract: An apparatus for obtaining bio information includes: a first electrode portion including a current electrode and a voltage electrode arranged to contact a first body portion of a subject; a second electrode portion including a current electrode and a voltage electrode arranged to contact a second body portion of the subject; and a measuring unit configured to measure a bio impedance of the subject by applying a current to the current electrodes of the first and second electrode portions and detecting a voltage at the voltage electrodes of the first and second electrode portions. In order to decrease errors of a measured bio impedance, contact resistances of the first and second body portions of the subject contacting the current electrode and the first and second body portions of the subject contacting the voltage electrode are different from each other, for at least one of the first and second electrode portions.

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