Electric field sensor

Details Electric field sensor Electric field sensor

G - Physics

01

R

G01R 29/08 (2006.01) A61B 5/04 (2006.01) A61B 5/0428 (2006.01) G01R 29/12 (2006.01) A61B 5/0408 (2006.01)

Patent

CA 2280996

An electric field sensor employs a capacitive pick-up electrode in a voltage divider network connected to a body emanating an electric field. The pick-up electrode is positioned at a "stand off" location, spaced from intimate contact with the surface of the body. This is equivalent to providing low level capacitive values for the capacitive coupling between the pick-up electrode and the body whose electric field is to be monitored. By avoiding intimate contact, the system is relatively insensitive to variations in the separation gap, reducing sensor motion artifacts in the output signal. Human body-generated electrical signals may be acquired without use of conductive gels and suction-based electrodes, without direct electrical contact to the body, and even through thin layers of clothing.

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