Detection of a dielectric object

A method for detecting a dielectric object comprising:

• determining an electrical potential in an electric field by means of a potential probe;
• supplying a first capacitance device and a second capacitance device with alternating voltages which are amplified in opposite directions in such a way that the magnitude of an alternating voltage component, which is clock-synchronous with the alternating voltages, of the determined electrical potential is minimized;
• and
• detecting the dielectric object when a ratio of the alternating voltages does not correspond to a ratio of (i) a first distance of the potential probe from the first capacitance device to (ii) a second distance of the potential probe from the second capacitance device.

A non-transitory computer-readable storage medium comprising:

• programmed instructions configured to be executed by a processing device and to cause the processing device to perform a method of
• detecting a dielectric object,
• wherein the method includes
• (i) determining an electrical potential in an electric field by means of a potential probe,
• (ii) supplying a first capacitance device and a second capacitance device with alternating voltages which are amplified in opposite directions in such a way that the magnitude of an alternating voltage component, which is clock-synchronous with the alternating voltages, of the determined electrical potential is minimized, and
• (iii) detecting the dielectric object when a ratio of the alternating voltages does not correspond to a ratio of a first distance of the potential probe from the first capacitance device to a second distance of the potential probe from the second capacitance device.