Patent ID: 6293140
Filing Date: 2001-09-25
Classification: B60C,B60G,B60T,G01M,G01P

Abstract:
A device for detecting rotational behavior of a vehicle wheel on a road surface, comprising:a tire made of a rubber substance;an encoder rotating with the vehicle wheel and having permanent magnet areas with alternating polarity that are evenly distributed in a circumferential direction of the vehicle wheel;a stationary measurement transducer sensitive to magnetic fields for providing an output signal representative of the rotation movement of the wheel, the measurement transducer including a plurality of measuring elements that are offset from each other by a predetermined distance in both a radial and angular direction with respect to an axis of rotation of the vehicle wheel to define a first phase shift in the output signal; andan electric circuit for evaluating the output signal of the measurement transducer,wherein a deformation in the vehicle tire causes a second phase shift different than the first phase shift indicative of a torque transmitted from the vehicle wheel to the road surface.