Sensor system for measurement of one or more vector components of an electric field
First Claim
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1. A compact sensor system for measuring at least one component of a small electric field generated by an object comprising:
- a first, capacitive-type electrical sensor adapted to generate first electric potential signals related to the electric field at a first position spaced from the object;
a second electrical sensor located at a second position which is spaced a predetermined, fixed distance from said first position and does not depend on the object generating the small electric field, said second electrical sensor being adapted to generate second electric potential signals related to the electric field; and
a controller for processing the first and second electric potential signals to determine a first vector component, having both a magnitude and a direction, of the electric field.
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Abstract
A sensor system accurately measures, with a high level of sensitivity, one or more vector components of a small electric field, through the use of multiple, relatively fixed sensors, at least one of which constitutes a weakly coupled capacitive sensor. The sensor system enables the electric field to be determined in a direction normal to a surface or along multiple orthogonal axes. Measurement of the electric field vector can provide improved resolution and characterization of electrical signals produced, for example, by organs within the human body.
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Citations
24 Claims
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1. A compact sensor system for measuring at least one component of a small electric field generated by an object comprising:
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a first, capacitive-type electrical sensor adapted to generate first electric potential signals related to the electric field at a first position spaced from the object; a second electrical sensor located at a second position which is spaced a predetermined, fixed distance from said first position and does not depend on the object generating the small electric field, said second electrical sensor being adapted to generate second electric potential signals related to the electric field; and a controller for processing the first and second electric potential signals to determine a first vector component, having both a magnitude and a direction, of the electric field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for measuring at least one component of a small electric field generated by an object comprising:
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positioning a first, capacitive-type electrical sensor at a first position spaced from the object; positioning a second electrical sensor at a second position which is spaced a predetermined, fixed distance from the first position and does not depend on the object generating the small electric field; generating first electric potential signals from the first electrical sensor related to the electric field; generating second electric potential signals from the second electrical sensor related to the electric field; and processing the first and second electric potential signals to determine a first vector component, having both a magnitude and a direction, of the electric field. - View Dependent Claims (23, 24)
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Specification