Measuring sensor
AssigneeWABCO Westinghouse GmbH
InventorGunther Singbartl
Life of this patent
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Abstract
A speed measuring sensing device for producing a signal corresponding to the relative angular rotation between two structural members including a rotor arranged on the rotating member and a stator mounted on the stationary member. The stator is separated from the rotor by an air gap. The rotor includes a plurality of magnetizable sectors which vary the magnetic field while passing a pole shoe of the stator. The surface area of each of the magnetizable sectors of the rotor and the surface area of the pole shoe of the stator exhibit a maximum ratio of 1 to 1.
Claims6
A speed measuring sensor for producing an output signal corresponding to the angular rotation between two relatively movable components and including a rotor driven by the rotating component and a stator carried by the stationary component, the stator includes only a single dependent cylindrical pole shoe, the pole shoe of the stator is separated from the rotor by an air gap, the rotor includes a ring-like magnetic member having a plurality of magnetizable projecting sectors of equal dimensions which change the magnetic field while passing the pole shoe of the stationary mounted stator, characterized in that the surface area of each of the plurality of the magnetizable sectors of the rotor and the surface area of the pole shoe of the stator exhibit a maximum ratio of 1 to 1 and in that the maximum cross sectional dimension of each of the magnetizable sectors of the rotor is equal to the maximum distance between two adjacent magnetizable sectors of the rotor so that spurious noise signals are minimized.
Dependencies are inferred from the claim text.