RV-4 Sensors Wheel Vector Sensors0 pages

Movement

RV-4 Sensors

Type CRV4A...

Wheel Vector Sensors
For simultaneous measurement of all wheel positions and
orientations in 5 axes.
•t Complete acquisition of the wheel movements
•t Robust design
•t Easy and quick mounting
•t Easy to extend with option for slip angle measurement
•t Resistant to splash water, engine oil, and anti-freeze
Description
RV-4 sensors are mechanical systems which are designed for
measuring space and direction coordinates of the vehicle
wheel. The sensors carry out all movements with the wheel,
except for the rotation about the wheel axis. Provided an
adequate sampling rate of the articulation positions, it is possible to simulate wheel movements of a complete test drive.

CRV4A_000-816e-04.13

RV-4 sensors consist of five absolutely measuring high precision angle transducers. Together, these measure the space coordinates in a vehicle-related coordinate system: Wheel deflection, camber, x-movement, y-movement, and z-movement
(spring travel).
By using the RV-4 sensors with a wheel force transducer the
forces and torques of a vehicle wheel can additionally be measured. An optional wheel pulse transducer can be used to determine wheel speed.
Application
RV-4 sensors are designed for various vehicle tests like e.g.:
•t Weight shift and spring travel when braking
•t Changes in camber angle when cornering
•t Dynamic self-steering properties
•t Tire strain
•t Changes in wheel position, when braking or accele­ ating
r
•t Rear-wheel tracking
•t Recording of test and race tracks for simulators
Measurement results of the above tests provide the basis for
tasks such as:
•t Wheel-well clearance measurement and design
•t Chassis development and refinement
•t Spring and shock absorber development
•t Wheel toe and camber angle adjustment
•t Tire development
•t Testing of driver assistance systems

Technical Data
Performance Specifications
Measuring range
tX-axisttt
tY-axisttt
tZ-axis1)ttt
tCamberttt
t Steerttt
Measurement accuracy
tX-axisttt
tY-axisttt
tZ-axisttt
tCamberttt
t Steerttt
Reproducibility
tX-axisttt
tY-axisttt
tZ-axisttt
tCamberttt
t Steerttt
1)

mmtt
mmtt
mmtt
°tt
°tt

±150
±150
±200
±10
±45

mmtt
mmtt
mmtt
°tt
°tt

±1
±0,7
±1
±0,2
±0,1

mmtt
mmtt
mmtt
°tt
°tt

±0,5
±0,5
±0,5
±0,1
±0,05

If the entire measuring range of the z-axis (±200 mm) is utilized, the
maximum measuring ranges of the y- and x-axis will be restricted.

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This information corresponds to the current state of knowledge. Kistler reserves
the right to make technical changes. Liability for consequential damage resulting
from the use of Kistler products is excluded.

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