Dry skin conductance electrode

a conductance electrode and skin technology, applied in the field of dry skin conductance electrodes, can solve the problems of white swelling of the skin and brown skin coloration, and achieve the effect of improving the accuracy of emotional event detection

Inactive Publication Date: 2013-12-19
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]It is an object of the present invention to provide, for long-term measurements, a dry skin conductance electrode, as well as a skin conductance sensor, wristband and emotional event detection system comprising such dry electrodes, which does not cause problems to the user, such as skin irritation or skin coloration, while still providing a good signal level.

Problems solved by technology

However, prolonged wearing of gel electrodes causes undesirable side effects, such as a white swelling of the skin caused by hydration.
However, due to the Ag / AgCl material, prolonged wearing of this device causes brown skin coloration due to the injection of silver ions into the skin, which is an undesirable side effect.

Method used

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Examples

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Embodiment Construction

[0041]FIG. 1 shows an interface between skin 10 of a user and two dry electrodes 12, 13 according to an embodiment of the present invention. For example, when the user wears a skin conductance sensor 20 comprising the two dry electrodes 12, 13, the two dry electrodes 12, 13 are placed on the skin of the user. A voltage 11 is applied between the two dry electrodes 12, 13 such that a positive electrode 12 and a negative electrode 13 is provided. The positive electrode 12 has an outer surface 15 which interfaces with the skin 10 and the negative electrode 13 has an outer surface 19 which interfaces with the skin 10. The skin-electrode interface is an interface between a medium where the current carriers are predominantly electronic (electrodes 12, 13 in FIG. 1), and a medium where the current carriers are predominantly ionic (skin 10 in FIG. 1). Usually such an interface suffers from a poor charge transfer, leading to the formation of a space charge.

[0042]However, as can be seen in FIG...

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Abstract

The present invention relates to a dry skin conductance electrode (12, 13) for contacting the skin (10) of a user. In order to provide a dry skin conductance electrode for long-term measurements which does not cause problems to the user while still providing a good signal level, the electrode (12, 13) comprises a material made of a noble metal doped with at least one dopant selected from the group consisting of hydrogen, lithium, sodium, potassium, rubidium, caesium and beryllium. The present invention also relates to a skin conductance sensor (20), a wristband (30) and an emotional event detection system.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a dry skin conductance electrode for contacting the skin of a user and to a skin conductance sensor comprising at least two dry electrodes, wherein the sensor is adapted to sense a user's skin conductance between the at least two dry electrodes. The present invention also relates to a wristband comprising such a skin conductance sensor and an emotional event detection system comprising such a skin conductance sensor.BACKGROUND OF THE INVENTION[0002]It is known that skin conductance of a user is related with the level of arousal of a user. Everything that emotionally touches the user activates the sweat glands in the skin leading to a better conductor path through the skin. For example, in a known lie detector or polygraph, a skin conductance sensor connected to the palm of the hand or to the fingers is used.[0003]Commonly, gel electrodes are used for skin conductance sensors. These gel electrodes offer a high signal level....

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B5/053
CPCA61B5/053A61B5/0533A61B5/681A61B2562/125
Inventor OUWERKERK, MARTIN
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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