Method and arrangement for determining a magnetic field

Abstract

Abstract 1. A method of determining a magnetic field by means of a magnetic probe (SON) which has a saturable iron core carrying a winding arrangement (LS), wherein at least one winding of the winding arrangement (LS) is connected to a rectangular, alternating excitation voltage which produces in the saturable iron core an internal magnetic field superimposed on an external magnetic field, e.g. the earth's field, and so changes the saturation conditions of the iron core, and wherein a response signal is derived from at least one winding of the winding arrangement (LS) consisting of induced voltage pulses (U'ind ) as a function of the magnitude of the external magnetic field, characterized in that the pulse duration (t'u ) of the individual induced voltage pulses (U'ind ) is measured and compared with a reference value (tu ) that corresponds to the pulses duration of the induced voltage pulses (Uind ) without the influence of an external magnetic field ; that the difference (tvphi ) between the measured pulse duration (t'u+ ; t'u- ) of the positive and negative voltage pulses (U'ind+ ; U'ind- ) is formed and the reference value (tu ) eliminated, and that from the difference (tvphi ) the field strength is determined and displayed.

Inventors

• 👤 Uwe Metzner
• 👤 Peer Dr.-Ing. Thilo

Bibliographic Details