| 摘要 |
<p>This device comprises two superposed pairs of sensor coils (1, 2, 5, 6). Each pair is comprised of two series coupled windings, but with opposite winding directions, each winding of a pair being provided with a layer of rectilinear conductive portion (1a, 2a, 5a, 6a), arranged side by side, parallel and superposed to similar portions of the other winding. These two windings extend respectively on either side of the superposed layers thereof. The superposed layers of one pair of windings are normal to those of the other pair. This arrangement is intended to induce in each pair of coils, under the action of a permanent magnet with a flux substantially perpendicular to these windings, fluxes which add to each other when the inductive flux varies in a plane parallel to the coils and which cancel each other when the inductive flux varies perpendicularly to that plane. </p> |
