Patent ID: 6505513
Filing Date: 2003-01-14
Classification: G01D,G01P

Abstract:
An arrangement for measuring the rotary velocity of a rotatable wheel mounted to or in a vehicle, comprising:a sensor manufactured by the thin-film technology, including magnetoresistive sensor elements, the sensor measuring a magnetic field which is modulated by a structure of the wheel depending on the rotary velocity of the wheel; and an electrically conducting layer manufactured by thin-film technology at the outside of the sensor, which layer reduces a capacitive coupling between the wheel and the sensor elements which would occur without the layer, and which layer is capacitively coupled to the wheel; and in which: the electrically conducting layer, is made of a metal material, is manufactured by a thin-film technique at least at one side of the sensor by layer deposition on an insulating layer, and has a layer thickness of approximately 0.2 to 3 &mgr;m; the electrically conducting layer is electrically connected outside a substrate on which the sensor elements are built up; an electrical connection is provided subsequent to forming the thin-film technology; and the electrically conducting layer is connected to a reference potential by the electrical connection.