| 摘要 |
<p>The inductive sensor arrangement for detecting metal objects hidden in a surrounding medium comprises a pair of field coils (1A,1B) for generating an alternating magnetic flux by a sequential excitation with an AC-current and a pair of sense coils (2A,2B) respectively mounted inside each associated field coil in an orientation to the axes of each of said field coils such that essentially no voltage is induced in said sensor coils in an environment free of a metallic object. If a metallic object comes into the vicinity of the inductive sensor four characteristic voltage value sets (a,b,c,d) are produced by the sense coil pair which become subject of an algorithmic processing for defining a position and distinction criterion in respect to said hidden metallic object. <IMAGE></p> |
