Associated system and method for detecting the final loads on a vehicle wheel by means of a sensorized wheel hub unit
AssigneeAktiebolaget Skf
InventorsSimone Baliva, Marco Cambiano
Life of this patent
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Abstract
A method and system for detecting forces and moments acting on a vehicle wheel, wherein an outer ring of a wheel hub unit has a plurality of strain sensors configured to generate first signals (Ds1) proportional to mechanical stresses on the outer ring and a temperature sensor generating a second signal (Ds2). Further, the detection system comprises a second processing unit configured to process third signals (Dv1,n) corresponding to selected vehicle state parameters; and a third processing unit that receives the third signals and the pseudo-sinusoidal signal and calculates said forces and moments on the vehicle wheel.
Claims13
A system for accurate real-time detection of forces and moments acting on a wheel of a vehicle, comprising:
- an outer ring of a wheel hub unit;
- a plurality of strain sensors carried integral by the outer ring, the plurality of strain sensors configured to generate first electrical signals (Ds1) as a function of respective mechanical stresses(S) acting on the outer ring;
- a first processing unit configured to,
- receive, upon deformation of the plurality of sensors, a plurality of said first electrical signals and a second electrical signal (Ds2) proportional to an internal temperature of the wheel hub unit, and
- generate a pseudo-sinusoidal signal comprising frequency and instantaneous amplitude proportional to the mechanical stresses;
- a second processing unit configured to receive and process a plurality of third electrical signals (Dv1,n) corresponding to selected parameters of the vehicle;
- and
- a third processing unit configured to,
- receive the plurality of third electrical signals and the pseudo-sinusoidal signal,
- calculate, in real time, on the basis of the received plurality of third electrical signals and the pseudo-sinusoidal signal, forces and moments applied to the vehicle wheel,
- extrapolating the forces and moments on the basis of a series of data previously fed to said third processing unit and corresponding to forces and moments previously experimentally detected on the vehicle wheel following the execution with the vehicle of a series of predetermined maneuvers.
A method for accurately detecting, in real time, forces and moments acting on a wheel of a vehicle carried by a wheel hub unit, comprising:
- a first step in which a plurality of first electrical signals and second electrical signals are processed to generate a pseudo-sinusoidal signal comprising an instantaneous frequency and amplitude proportional to mechanical stresses;
- a second step of detecting and processing a plurality of third electrical signals (Dv1,n) proportional to selected vehicle state parameters;
- and
- a third step in which each of the plurality of third electrical signals and the pseudo-sinusoidal signal are processed to provide in real time the forces and moments (Fx,y;Mx) applied to the vehicle wheel, the third step being performed on the basis of a series of data comprising values of forces and moments experimentally detected on the vehicle wheel following execution of a series of predetermined maneuvers by the vehicle,
- wherein the wheel hub unit comprises an outer ring provided with a plurality of strain sensors integral therewith, each of the plurality of strain sensors being configured to generate first electrical signals (Ds1) as a function of respective mechanical stresses(S) acting locally on the outer ring, and a temperature sensor configured to generate a second electrical signal (Ds2) proportional to an internal temperature of the wheel hub unit.
Dependencies are inferred from the claim text.