Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
737716 | Sensors and Actuators A: Physical | 2010 | 7 Pages |
Abstract
This paper focuses on the design and experimental test of a null-offset differential electromagnetic sensor characterized by simplicity, flexibility and low cost. This sensor consists of two planar excitation coils, which generate magnetic field and a planar acquisition coil, which senses the sample material. The differential configuration of the sensor improves signal conditioning and reduces the common-mode noise. We present analytical and numerical (simulation) studies of the working principle. Experiments were performed to test the ability of the sensor to detect non-invasively: (i) the presence of metallic samples and (ii) the variations of glucose in human blood.
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Authors
R.R. Robaina, Héctor Trujillo Alvarado, J.A. Plaza,