Method for the contactless determination of an electrical potential of an object using two different values for the electric flux, and device

摘要

A method for the contactless determination of an electrical potential of an object, involves providing an electrode which is spatially at a distance from the object, connecting the electrode to a reference potential, determining a first temporal change in an electrical state of charge of the electrode at a first value for the electric flux between the electrode and the object, determining a second temporal change in the electrical state of charge of the electrode at a second value for the electric flux between the electrode and the object, and determining the electrical potential of the object at least from the first temporal change in the electrical state of charge and the second temporal change in the electrical state of charge and from a difference between the first value and the second value for the electric flux.

主权项

1. A method for contactless determination of an electrical potential of an object, comprising:
providing a space between both a first electrode and a second electrode and the object; comparing the first electrode to a first reference potential and the second electrode to a second reference potential; setting a first value for electric flux between the first electrode and the object by positioning the first electrode at a first distance from the object and setting the first reference potential to a first potential value; determining a first temporal change in an electrical state of charge of the first electrode at the first value for the electric flux between the first electrode and the object; setting a second value for the electric flux between the second electrode and the object by positioning the second electrode at a second distance from the object and setting the second reference potential to a second potential value; determining a second temporal change in the electrical state of charge of the second electrode at the second value for the electric flux between the second electrode and the object; and determining the electrical potential of the object at least from the first temporal change in the electrical state of charge of the first electrode, from the second temporal change in the electrical state of charge of the second electrode and from a difference between the first value and the second value for the electric flux.