A method and device for the determination of geometric, magnetic and / or electrical properties of magnetic, a dielectric and / or electrically conductive particles in a sample

摘要

A method for the determination of geometric, magnetic and / or electrical properties of magnetic, a dielectric and / or electrically conductive particles in a sample (3) comprising the steps of:a) performing a first measurement witha1) having an electrical and / or magnetic alternating field (20) with a first frequency into the sample (3),a2) of the received from the sample (3) radiated electrical and / or magnetic alternating field (22) as the first received signal,b) performing a second measurement according to the first measurement withb1) coupling of an electrical and / or magnetic alternating field (20) with a second frequency in the sample (3), wherein the second frequency is not equal to the first frequency is, after completion of the introduction of the alternating field is effected with the first frequency,b2) of the received from the sample (3) radiated electrical and / or magnetic alternating field (22) as a second received signal,c) determining a first frequency spectrum (24) from the first received signal and a second frequency spectrum from the second received signal,d) determining geometric, magnetic and / or electrical properties of the magnetic, dielectric and / or electrically conductive particles in the sample (3) from the first and the second frequency spectrum (24) by comparing the evaluation of this frequency spectra (24).