Description:As attached in pdf , Claims:As attached in pdf

We claim:
1. A wheel alignment system, comprising:
‐ a calibration system [100], the calibration system [100] comprising:
o a magnetometer device [102] installed at one of: within at least
5 one wheel [202] of a vehicle [200] or on a vehicle frame of the
vehicle; and
o at least one field generating system installed at other of: within
at least one wheel [202] of the vehicle [200] or on the vehicle
frame of the vehicle, the at least one field generating system
10 being adapted to generate a reference magnetic field,
wherein the said reference magnetic field is rotatable in directions
ranging from 0 to 360 degrees, for calibration of the magnetometer device
[102] in directions ranging from 0 to 360 degrees.
2. The wheel alignment system as claimed in claim 1, wherein the at least
15 one field generating system of the calibration system [100] is selected
from a magnet arrangement [106a] and an electromagnetic coil
arrangement [106b].
3. The wheel alignment system as claimed in claim 1, wherein the
magnetometer device [102] is selected from an active magnetometer
20 device or a passive magnetometer device.
4. The wheel alignment system as claimed in claim 2, wherein the magnet
arrangement [106a] comprises:
‐ a rotary table unit [108] defining a rotary platform [108a]; and
‐ at least one magnetic member [112] adapted to generate the
25 reference magnetic field,
wherein the at least one magnetic member [112] is rotatable relative
to the magnetometer device [102], to enable rotation of the reference
magnetic field generated by the at least one magnetic member [112] in
directions ranging from 0 to 360 degrees, for calibration of the
5 magnetometer device [102] in directions ranging from 0 to 360 degrees.
5. The wheel alignment system as claimed in claim 4, wherein the rotary
platform [108a] is mounted on at least one linear translation stage [108b]
of the rotary table unit [108], to allow axial alignment of the at least one
magnetic member [112] and the magnetometer device [102], while the at
10 least one linear translation stage [108b] is fixedly coupled to the vehicle
frame [204].
6. The wheel alignment system as claimed in claim 5, wherein the rotary
table unit [108] comprises an adjustment arrangement [108c] being
adapted to cause controlled rotation of the rotary platform [108a] relative
15 to the at least one linear translation stage [108b] of the rotary table unit
[108].
7. The wheel alignment system as claimed in claim 6, wherein the rotary
table unit [108] comprises at least a stopper provision [108d] being
adapted to lock the rotary platform [108a] relative to the at least one
20 linear translation stage [108b], in each of a plurality of angular positions of
the rotary platform [108a] ranging from 0 to 360 degrees, relative to the
linear translation stage [108b].
8. The wheel alignment system as claimed in claim 2, wherein the
electromagnetic coil arrangement [106b] comprises a plurality of
25 electromagnetic coils [114] supplied with a polyphase current, such that
the plurality of electromagnetic coils [114] generates the reference
magnetic field being rotatable in directions ranging from 0 to 360 degrees.
9. The wheel alignment system as claimed in claims 1 to 7, wherein
‐ the rotary table unit [108] of the magnet arrangement [106a] is fixed
to the vehicle frame [204] of the vehicle [200], while the
magnetometer device [102] is installed on the rotary table unit [108],
to install the magnetometer device [102] on the vehicle frame [204] of
5 the vehicle [200],
‐ the magnetic member [112] of the magnet arrangement [106a] is
installed at either of: within a rim, on the inner tyre liner, or
embedded within a tyre [202a] of the at least one wheel [202], to
install the magnet arrangement [106a] within the at least one wheel
10 [202].
10. The wheel alignment system as claimed in claims 1 to 7, wherein the
magnet arrangement [106a] is installed on the vehicle frame [204] of the
vehicle [200], while the magnetometer device [102] is installed on either
of: on the wheel rim, on the inner liner, or embedded within the tyre
15 [202a], to install the magnetometer device [102] on the at least one wheel
[202].