Patent attributes
A sensor system is disclosed for sensing the position of an object. The system can include a power source and a nullification circuit electrically connected to the power source, the nullification circuit including an output voltage. An electrical medium can be integrated into the nullification circuit, the electrical medium producing a standing wave electric field about the electrical medium when power is supplied from the power source to the electrical medium. The nullification circuit is configured such that the output voltage of the nullification circuit is substantially zero when power is supplied to the electrical medium and the object is not within a predetermined minimum distance from the electrical medium, the output voltage of the nullification circuit having a non-zero value when the object is within the predetermined minimum distance from the electrical medium.
