Enhanced pickup-electrode
First Claim
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1. A bio-electrode for sensing body electrical fields present at a location on the surface of such body, said bio-electrode being fitted with an enhancement layer on the body-side of the electrode wherein the enhancement layer comprises a superabsorbent material which:
- a) has electrical conductivity when moistened with water to provide electrical conduction between the body and the electrode;
b) has the capacity to contain water; and
c) emanates water through its outer body-facing surface when water is contained therein to thereby quiet tribo-electric effects at the interface between the enhancement layer and a body that is a source of an electrical field.
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Abstract
A bio-electrode (54) for obtaining ECG'"'"'s and EEG'"'"'s is enhanced by a cushioning layer (51) placed intermediate the body (3) and electrode (54). This enhancement layer (51) can carry and release water or moisture into the electrode-to-body interface. Moisture provided to this interface is ionically conductive, reducing tribo-electric noise. A bio-electrode so enhanced can obtain signals through clothing.
147 Citations
20 Claims
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1. A bio-electrode for sensing body electrical fields present at a location on the surface of such body, said bio-electrode being fitted with an enhancement layer on the body-side of the electrode wherein the enhancement layer comprises a superabsorbent material which:
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a) has electrical conductivity when moistened with water to provide electrical conduction between the body and the electrode;
b) has the capacity to contain water; and
c) emanates water through its outer body-facing surface when water is contained therein to thereby quiet tribo-electric effects at the interface between the enhancement layer and a body that is a source of an electrical field. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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2. A bio-electrode for sensing body electrical fields present at a location on the surface of such body, said bio-electrode comprising:
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a) a capacitive electrode plate;
b) an insulative dielectric layer positioned against the electrode plate on the body-side of the electrode plate, and being fitted with an enhancement layer on the body-side of the electrode wherein the enhancement layer;
c) has electrical conductivity when moistened with water to provide electrical conduction between the body and the electrode;
d) has the capacity to contain water; and
e) emanates water through its outer body-facing surface when water is contained therein to thereby quiet tribo-electric effects at the interface between the enhancement layer and a body that is a source of an electrical field; and
wherein the enhancement layer is positioned against the dielectric layer on the body-side.
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Specification