Position-electrical signal transducer
AssigneeRobert Bosch GmbH
InventorsKarl-Otto Linn, Walter Jansche, Dietrich Adolph, Artur Dannemann
Life of this patent
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Abstract
To provide a rugged vibration and shock-insensitive position transducer, a coil is wound on a lamella-like carrier which has a body element of electrically insulating material on which, at least on one surface, a foil of magnetically highly permeable material is positioned; these lamella-foil combinations can be stacked, or a unitary body which foils on both sides can be provided. A short-circuit ring, movable along the core, changes the inductance of the coil wound thereon, the value of which can be determined by energizing the coil with alternating current.
Claims12
Position-electrical signal transducer to provide an electrical output signal representative of displacement (A) of an element comprising
- a core including magnetically conductive material;
- a coil (6) wound on the core and adapted for connection to a source of alternating current;
- a movable short-circuit ring coupled to said element placed on the core and coupled, at least in part, to the magnetic field generated by the coil upon being energized, the short-circuit ring being movable in a direction transverse to the plane defined by the ring;
- and wherein, in accordance with the invention, the core comprises
- the combination of a carrier body (8) of electrically insulating material, and a foil or layer (9) of a material of high magnetic permeability located and supported on at least one surface of said carrier body.
Dependencies are inferred from the claim text.