On the signal processing for an exposure assessment of superimposed magnetic fields

The aim of this paper is the treatment of three-dimensional measurement data when superimposed magnetic fields are measured in space. The introduced methods can simplify the exposure assessment of pulsed or broadband magnetic fields. A practical way to detect a superposition of two or more field sources is introduced. Additionally two ways for a decomposition of superimposed fields are demonstrated. These methods can be integrated in a measurement device for an automatic and source oriented exposure assessment. Thereby, the time consuming processing of measurement data can be simplified. The examples show that under certain conditions the number of field sources can be estimated. The application of decomposition methods or spatial filtering is useful for a source oriented assessment procedure.