Device and method for measuring the composition of the body
AssigneeSeb S.A.
InventorsMichel Sarrazin, Alain Duborper
Life of this patent
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Abstract
A device for measuring the composition of the body of a person includes a first electronic module which measures a bioelectrical impedance and including at least one current source which delivers a variable electrical signal that passes through the body of the person when the person is connected to the measuring device. The electrical signal is a squarewave the duration of which is variable to determine the global impedance, the intracellular impedance and the extracellular impedance of the body of the person directly.
Claims9
A method for measuring a bioelectrical impedance of a person's body, said method comprising the steps of:
- applying at least a first and a second pair of electrodes on a person's body;
- applying a periodic electrical signal having a square wave shape between said first pair of electrodes connected to said body;
- measuring voltage values between said at least second pair of electrodes also connected to said body, at times when a capacitive component of said voltage value is cancelled due to the square shape of said electrical signal;
- determining from said measured voltage values a bioelectrical impedance value;
- and
- displaying said bioelectrical impedance value.
A device for measuring the composition of the body of a person, said device comprising:
- a first electronic module adapted to measure a bioelectrical impedance and including at least one current source adapted to deliver a periodic electrical having a square wave shape, said current source being connected to two excitation electrodes adapted to be connected to a person's body;
- and a measuring unit for measuring a voltage value between two measuring electrodes adapted to be connected to said body;
- a computing module comprising means for determining a bioelectrical impedance of said body as a function of voltage values provided by said measuring unit;
- and
- a display unit for displaying said bioelectrical impedance.
Scales for weighing a person comprising:
- an upper horizontal pan;
- a first electronic module for measuring a weight of a person standing on said pan;
- a second electronic module for measuring a bioelectrical impedance of said person, said second electronic module including at least one current source adapted to deliver a periodic electrical signal of square wave shape which is applied to the body of said person through a first pair of electrodes and a measuring unit for measuring a voltage value between a second pair of electrodes, said first and second pair of electrodes being disposed to be in contact with said body when said person is standing on said pan;
- a computing module for determining a bioelectrical impedance of said body as a function of said voltage value and a fat body mass, a lean body mass and an amount o water contained in said body as function of said bioelectrical impedance and said measured weight;
- and
- display means for displaying said bioelectrical impedance, said fat body mass, said lean body mass and said amount of water contained in said body.
Dependencies are inferred from the claim text.