Patent ID: 9594182
Date: 2017-03-14
CPC Classifications: G01B,G01V

Claim:
1. A locating appliance for the capacitive detection of an object enclosed in a medium, comprising: a measurement electrode arranged in a plane with a reception electrode, the measurement electrode and the reception electrode configured to form a measurement capacitance that is influenced by the object; a reference electrode, the reference electrode and the reception electrode configured to form a reference capacitance that is not influenced by the object; an evaluation circuit configured to provide an output signal on the basis the measurement capacitance and the reference capacitance; and a spacer configured to hold the measurement electrode and the reception electrode at a predetermined minimum distance, other than zero, from the surface of the medium, the predetermined minimum distance being a distance at which the output signal is at one of a minimum and a maximum, independent of whether the object is present, wherein the measurement electrode, the reception electrode, and the reference electrode are arranged in common plane.