VEHICLE WHEEL INSTRUMENTATION

 


Rotating Wheel Dynamometer RWD

Measure Wheel Forces on a Passenger Car in the Morning
and on a Light Truck in the Afternoon with a single RWD.

The lightweight Rotating Wheel Dynamometer (RWD) features
quick installation, extremely wide frequency response and
robust design. This allows the RWD to measure accurately
on all road surfaces, test stands and vehicle types through
light truck. Both automobile and tyre designers appreciate this
powerful tool for collecting reliable road data/profiling in an
efficient and time-saving manner.

The sensor system installs in place of a standard rim to measure
forces acting between the road and the vehicle. It is an essential
high-performance tool to optimise tyres, suspensions and vehicle
dynamic control systems under actual rood conditions.

The use of piezoelectric quartz force sensors and integrated
built-in electronics make the system rugged, easy to use and
gives the highest possible measuring performance. Adapters
for different hubs and rims make the unit very flexible for a wide
variety of applicafions and measurement needs.

Additional measurement data can be gathered with the opfional
Corrsys slip angle sensor. This combinafion allows the
measurement of tyre slip angle combined with tyre forces
(Fx, Fy, Fz) and torques (Mx, My, Mz).

Key Features
 
(The Rotating Wheel Dynamometer combined with the Corrsys slip
angle sensor provides additional information about the wheel-road
interaction.)



 
Rotating Wheel Torquemeter (RWT).

The RWT was specified and designed in close cooperation
with end-users. From their suggestions and using the full
advantages of quartz measurement techniques, KISTLER
introduces a cutting edge product - the Rotating Wheel
Torquemeter.

It is a universal sensor system, easy to use, with less than
15 minutes setup time. Obtaining reliable data within 15 minutes
was one of Kistler's major goals.

All sensor specific data is downloaded and the system automatically
resets for continued testing without any additional user interaction.
Signal output is available through analog channels, CAN-bus or
RS-232C interface. Users can connect one of these interfaces to
any standard data acquisition system.

Even at the lowest torque loads KISTLER guarantees highest
resolution without compromising test driver safety. The driver
can fully concentrate on his lob and drive the test vehicle as a
customer would without the fear of overloaded torque sensors
and broken wheels.




In addition to the torque signal, the sensor offers (on the rotating
side) four inputs for K-type thermocouples (isolated or non-isolated).
Signal conditioning and amplifiers are integrated in the RWT.
Temperature data is also transmitted wireless to the control unit.
Again this feature saves setup time, additional weight (unsprung
mass) and costs. It also produces excellent signal quality.

Key features
It is possible to mount a slip-ring transmission module and fixation
arm, instead of the transceiver head. This solution includes a
digital angle encoder for applications where angular information
is required.

Technical Data

Torque Channel ...... One
Measuring Range l ...... ±3000 Nm
Measuring Range II ...... ±300 Nm
Resolufion Range I-Il	...... 1.5 Nm
Add. unsprung mass ...... 2.5 kg
Sampling rate ...... 1000 samples/s
Temperature channels ...... 4 x K-type (isolated or non-isolated)
Output interfaces ...... CAN, RS-232C 
Optional output ...... ±5 V analogue
Environmental seal ...... IP65
Operating temperature - Electronics ...... -25 to +80 °C  Elements ...... -35 to +125 °C
Supply voltage CU ...... 9 to 16 VDC





 The modular system consists of three
 main components:
 The torque sensor, the transceiver head
 for telemetric signal transmission and the
 control unit located in the vehicle.






The Rotating Wheel Torquemeter is used for
Vehicle Development Testing in the areas of...
These applications and more con be covered by the Kistler RWT sensor
system with its unique ability to cover all ranges of torque in one unit.


(This extract is taken from the Kistler 'Vehicle Engineering News' - Oct 2000)

For more information, contact...

Kistler Instrumente AG Winterthur, Switzerland (Parent Company)
Email: sales@kistler.ch  Website: www.kistler.com

Kistler Instruments Ltd. - UK
Email: sales@kistler.co.uk  Website: www.kistler.com

For details of Sensors Suppliers, click here...
 


        
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