Vehicle-wheel bearing device with sensor

摘要

A vehicle-wheel bearing device with a sensor of the present invention includes a plurality of sensors, mounted to a vehicle-wheel bearing, for detecting load thereon, and signal processor for processing an output signal therefrom to generate a signal vector, and load calculator for calculating load acting on a wheel based on the signal vector. The load calculator includes: a coefficient conversion processing unit for calculating an actual-state load estimation coefficient MC that is a load estimation coefficient for a state where the bearing is mounted to an actual vehicle, based on a standard load estimation coefficient MB that is a determined standard load estimation coefficient for the bearing; and a load calculation unit for calculating load on the wheel based on the signal vector and the actual-state load estimation coefficient MC calculated by the coefficient conversion processing unit.

主权项

1. A vehicle-wheel bearing device with a sensor comprising:
a vehicle-wheel bearing for rotatably supporting a wheel relative to a vehicle body including: an outer member having an inner periphery formed with a plurality of raceways; an inner member having an outer periphery formed with raceways held in face to face relation to the raceways of the outer member; and a plurality of rows of rolling elements interposed between the raceways of the outer member and the inner member that are held in face to face relation to each other; a plurality of sensors, mounted to the vehicle-wheel bearing, to detect load acting on the bearing; a signal processor to process an output signal from each sensor to generate a signal vector; and a load calculator to calculate a load acting on the wheel based on the signal vector, wherein the load calculator includes:
a coefficient conversion processing unit to calculate an actual-state load estimation coefficient MC that is a load estimation coefficient for a state where the bearing is mounted to an actual vehicle, based on a standard load estimation coefficient MB that is a determined standard load estimation coefficient for the bearing; anda load calculation unit for calculating a load acting on the wheel based on the signal vector and the actual-state load estimation coefficient MC calculated by the coefficient conversion processing unit,wherein the coefficient conversion processing unit of the load calculator includes
a conversion coefficient storage section to store a conversion coefficient T(k) used for conversion from the standard load estimation coefficient MB to the actual-state load estimation coefficient MC; anda parameter storage section to store a parameter k used for designation a state under which the bearing is mounted to the vehicle.