Title:
METHOD AND DEVICE FOR DETERMINING A SPEED BY MEANS OF AN INDUCTIVE SPEED SENSOR
Document Type and Number:
WIPO Patent Application WO/2019/154653
Kind Code:
A9
Abstract:
The invention relates to a method for determining a speed between a sensing element comprising at least one coil (3) and a ferromagnetic transmitter element (2) which modifies the inductance (L) of the at least one coil (3), in a vehicle, by means of an inductive speed sensor (1) comprising at least the coil (3) and the ferromagnetic transmitter element (2), according to which a modification of the inductance (L) of the at least one coil (3) is detected and the speed is determined based on the modified inductance (L) of the at least one coil (3), and where an inductive speed sensor (1) is respectively provided, as a wheel speed sensor, for at least two wheels (A, B) of the vehicle. According to the invention, a reversal of the direction of movement of the ferromagnetic transmitter element (2) in relation to the at least one coil (3) or a reversal of the direction of travel of the vehicle from forward travel to rearward travel or from rearward travel to forward travel is identified on the basis of at least one temporal phase shift (∆t1, ∆t2) of the time histories of the inductances (L) detected by means of the wheel speed sensors (1) of the at least two wheels (A, B).
Inventors:
KLUFTINGER ANDRE (DE)
HERGES MICHAEL (DE)
HUBER CHRISTOPH (DE)
EISSNER MARKUS (DE)
HERGES MICHAEL (DE)
HUBER CHRISTOPH (DE)
EISSNER MARKUS (DE)
Application Number:
PCT/EP2019/051967
Publication Date:
January 23, 2020
Filing Date:
January 28, 2019
Export Citation:
Assignee:
KNORR BREMSE SYSTEME FUER NUTZFAHRZEUGE GMBH (DE)
International Classes:
G01P13/04; G01P3/488; G01P3/49; G01P13/00
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