World Class Testing Technology
Road Load Data Acquisition
A totally unified approach combines high accuracy measurement, recording, and
data analysis in a user-friendly modular package; full integration of sensor, electronics and software from test setup through test report and generation of rig control
codes with links to popular fatigue design and analysis packages.
p Easy mounting, quick setup, alignment, and calibration saves time and money
p Rugged, durable sensor provides linear and accurate load measurement
p Compact, lightweight, rugged MOPS electronics package linked to laptop PC
p Powerful software for test setup, data acquisition, data output and analysis
p Online calculation allows calibration and alignment while driving
p Road Load MAGIC: easy software-controlled data collection
p Data output all channels analog to existing DAQ or directly to disk
p Time-saving output to fatigue analysis, such as nCode, and test rig control applications,
such as MTS RPCIII and others
A Unified Approach …
A TOTALLY UNIFIED SYSTEM APPROACH: TAKE DATA WITHIN MINUTES NOT HOURS
RS Technologies has combined its 25 years of experience in designing and developing wheel force
sensors with the latest in modern, modular electronic
data acquisition systems from Caesar DataSystems.
The result is the most modern and complete data
acquisition system for road load data collection and
handling tests available. This powerful measuring
system features extremely easy and simple installation and continuous checkout during operation, which
significantly reduces setup, alignment, and adjustment time, and gives instant real-time results during
testing.
The complete system has many outstanding and
unique features:
•
Ease of use of the overall system
•
Full integration of sensor with the data acquisition
for high-speed setup, recording, analyzing and
report generation of the test
•
Well-designed, linear, durable, and waterproof 6component wheel sensors and electronics
•
Extremely short mounting and setup time: less
than 10 minutes per wheel!
Road load data is one of the best sources of fundamental information necessary for analysis of the design, reliability, and structural integrity of vehicle
components. All elements of the measuring system
must have high accuracy and resolution to ensure
reproduction of the test conditions. This demand requires that you combine a durable, highly accurate
wheel sensor with an electronics package that can
record and process the data quickly and accurately.
•
Wireless telemetry data and power transfer, friction free with absolute data security and no servicing required
•
Compact electronics package with capability to
expand to any number and type of signal conditioning channels
•
Rolling zero and shunt cal: alignment, zero, and
gain adjustments while driving
The RS Tech-CAESAR approach fully integrates the
design of the Wheel Force Transducer (WFT) with
the hardware and software that supports Computer
Aided Data Acquisition (CADA). This includes the onboard signal conditioning, shunt calibration, angular
position resolution, and signal transmission to the
data acquisition equipment. The result is a unified
system that features rapid, accurate calibration and
alignment of the wheel sensor with the vehicle data
acquisition system.
•
16-bit resolution w/20 kHz sampling and calculation speed for all channels
•
Precise, uncompensated vector force resolution
for all rotating axes
•
Online calculation of resolved signals with outputs of resolved and unresolved signals in both
analog and digital form
•
Capability of creating files directly for fatigue
analysis and test rig simulation
WFT in Demonstration Rig
Wheel Sensor with TIU (in veh icle)
RS Tech & CAESAR DataSystems …
… To Road Load Data Acquisition!
DURABLE, HIGH ACCURACY SENSOR
The WFT from RS Technologies is a six-component
design that features an advanced, proprietary, durable, one-piece sensor section that is extremely rugged yet provides highly sensitive readings. The highly
refined one-piece sensor design helps to ensure that
calibration and crosstalk characteristics of the sensor
will not change following calibration or during a test.
Based upon many years of development and actual
application engineering, it is designed and manufactured to withstand severe loading and environmental
conditions like off-road handling and short-term submersion, yet supply superior performance, even
when outfitted with telemetry electronics.
WFT System, Exploded View
Because the mechanical design of the transducer
provides full linearity with minimal crosstalk, the WFT
system allows online calculation of the resolved force
and torque signals in the signal conditioning and control electronics. Calibration information is stored in
the transducer and is automatically trans ferred into
the calculation algorithm of the data processing.
Two Basic Types of Sen
Sensors
The WFTs and torque wheel sensors from RS Tec hnologies are designed for comprehensive measurement of road load force, torque, or both on an aut omotive, light truck, or heavy truck wheel. The WFTs
are designed to measure three forces and three moments on an automobile or truck wheel: longitudinal,
lateral, and vertical forces along with turnover moment, wheel torque, and turning moment. Torque
wheels are used primarily for testing of driving power
and braking performance. They are available with
high-resolution angle encoder for position and speed
tracking, and slip ring signal transfer for temperature
as well as high and low sensitivity torque studies.
WFT w/Telemetry
As a system, the WFT incorporates many outstanding features. It offers linearity over the complete
operating range and minimizes the chance of problems due to the loosening of bolts used to assemble
sensors from other manufacturers. The wheel sensors can accept extreme load inputs during the most
demanding road surface tests, yet they also have the
resolution and sensitivity to measure tire tread friction
forces.
The transducer is mounted between the modified rim
and a hub adapter that fits the bolt pattern of the vehicle. The slip ring or telemetry mounts to the WFT
and carries the signals to the data processing and
acquisition system.
MX
Turnover
Moment
FX
Longitudial
Force
FY
Lateral
Force
MY
Torque
Mz
Turning
Moment
FZ
Vertical
Force
Forces
Forces and Moments Illu strated
… Excellence in Testing Technology!
A Unified Approach …
Through use of our unified approach, the mounting,
adjustment, and setup of the WFT using the CADA
system is very straightforward and easily accomplished. When proper cabling and restraints are available, initial start up takes less than 20 minutes per
wheel. From a cold start, 10 minutes are required to
warm up the system. The initial non-running adjustment takes 3-5 minutes per wheel. A full recheck
and readjustment can be done as needed dynamically while driving. Rapid setup techniques allow verification of proper operation of all measuring elements
and the same sequence can be used immediately
following a test run to verify that the equipment has
maintained original setup.
Light Truck FWD Application
Wide Range of Sizes
The road load wheel and torque wheel are available
in a wide range of sizes and capacities to fit test requirements for subcompacts, standard passenger
cars, limousines, light trucks, SUVs, and heavy
trucks. Hub adapters and modified rims can also be
provided to adapt the sensor to the test vehicle.
Slip Ring or Telem etry
The road load or torque wheel sensors provide output
signals in real time to the CADA package via one of
two data transfer options: by slipring with angle resolver or by telemetry with angle encoder. The mechanical alignment, signal zeroing and gain adjustment are automatically performed while driving the
car, by simply rolling without braking or accelerating
in an unforced mode on a level surface for a few
revolutions of the wheels. The automatic alignment
and zeroing can also be done while the vehicle is on
a lift by rotating each wheel a few turns.
Set Up and Take Data In Min
Minutes
Once the wheels are prepared, the initial setup time
is about the same as changing a tire. The lug nuts
are fully accessible at any time for ease of mounting
on the vehicle and permitting relatively rapid changes
of rim and tire assemblies for specialized tests such
as winter handling and tire performance verification.
Cross Sectional View of WFT
A rod and a cable from the center of the wheel are
used to give vertical reference, provide power to the
wheel electronics and data transfer from the rotating
electronics to the onboard electronics.
RS Tech & CAESAR DataSystems …
… To Road Load Data Acquisition!
MOPS SYSTEM
Each channel of the wheel (total 16 per wheel force
transducer) is sampled and calculated with 20 kHz!
This provides a high degree of accuracy for the resolved signals, such that at a speed of 360 km/h with
a 14-inch wheel this results in one calculation of each
signal per one degree of revolution.
This basic MOPS signal conditioning system configuration can be easily extended to a full data acquisition
PC and post processing system. The combination of
the RS -WFT with the signal processing of MOPS and
the software packages µ-Lab and µ-Graph produces
a compact, efficient, and reliable measurement system that delivers accurate measurement values
immediately after the test.
MOPSMOPS- WFT RackRack- mount Unit
The MOPS system is the latest in modern, modular
electronic data acquisition systems. It is expandable
with signal conditioning for all types of strain gage
transducers, pressure sensors, accelerometers,
LVDT’s, RPM or virtually any type and number of
transducers, analog, serial or digital signals, or data
busses such as CAN. An angle position encoder input provides for accurate waveform resolution. The
electronics are extremely stabile and can be rezeroed and calibration gains checked automatically at
any time in a matter of a few sec onds. The MOPS
unit can be used as a signal conditioning and calculation unit with TIU and analog output modules, supplying all signals to an existing data acquisition system
or directly digitally interfaced with on-board PC. The
signal output can be as analog signals proportional to
the applied forces and torques and/or in digital form
transferred directly to a rugged PC notebook together
with online display, data recording and load classification.
For example, the MOPS unit and a rugged Panasonic
notebook PC are typically stored in the front of the
car. The MOPS is set up with the calibration and
shunt calibration values for the six components of
each wheel. The MOPS has two links to the notebook: an RS232 cable is used to set up the MOPS
and to carry out individual tests of all individual channels defined in the MOPS; a second cable is for data
transfer from the MOPS signal conditioning and A/D
converters to the notebook.
The MOPS-notebook combination is able to transfer
an aggregate data rate of 128 k Samples per second.
µ-Lab Software
µ-Lab provides real time display and data recording.
It is very flexible and powerful and can be programmed to do a very wide variety of calculations
and analysis tasks. For example, online processing
with µ-Lab allows the test driver to check that all systems are functioning correctly while measuring is in
progress.
µ-Graph Software
Caesar’s high-speed analysis software, µ-Graph, allows test data representation and offline analysis of
the data recorded on disk. Even data files with many
channels and Gigabytes of data can be seen and
analyzed within a few seconds. Format converters for
RPCIII, Matlab or other simulation or analysis software packages are also available from CAESAR.
The calculation from unresolved into resolved signals
is required because the rotating wheels have a rotating coordinate system, whereas global non-rotating
street coordinates relative to the vehicle body are
required. So, under normal conditions the following
signals are acquired:
1.
fx, unresolved
2.
fy, unresolved
3.
fz, unresolved
4.
mx, unresolved
5.
my, unresolved
6.
mz, unresolved
7.
Angle position, ö, of the wheel rotation
… Excellence in Testing Technology!
A Unified Approach …
8.
Sin ö of the rotational angle
9.
Cos ö of the rotational angle
10. RPM of the wheel (calculated from the sine and
cosine)
11. Number of revolutions of the wheel
The software then uses a series of formulas to resolve and convert signal data for all axes to account
for wheel rotation, wheel offset, and rolling radius.
MOPSMOPS-TIU
Through the use of CADA, the MOPS Transducer
Interface Unit (MOPS-TIU) has become fully int egrated into the data acquisition system, providing for
dynamic force, torque, and position communication
between the wheel sensor and the data acquisition
system.
Using modern microprocessor technology, the MOPS
system employs TIU signal conditioning modules that
are much smaller, lighter, and much faster than previous units. A single half-sized 19-inch rack-mount
unit provides signal conditioning for all four wheels
and is fully integrated with on-board calculation capability. There is virtually no warm-up time required
for the electronics. The TIU module consists of the
power supplies and signal conditioning electronics
that convert the WFT signals into equivalent signals
referenced to the wheel axes. In addition to supporting the WFTs, the TIU can provide up to 96 channels
for additional inputs in standard 8.5-inch or 19-inch
rack mount type package.
The TIU automatically and continuously adjusts the
sin ϕ and cos ϕ signal to be symmetric to the ZERO
line and to be max ±1V. It also compensates signal
offsets and gain of all strain gage-based signals
when the CAL switch is activated by user control or
by software when the data transfer is started beginning a new test record.
Road Load MAGIC
Our systematic approach provides for accurate data
acquisition and efficient post processing to maximize
the practical application of the test data. The MOPS
system can be extended by Road Load MAGIC
(Measurement & Analysis Generation Interface Controller), a software-driven package that controls all
data collection procedures together with vehicle,
component, road condition and handling information
and can run automated analysis routines.
The menu-controlled MAGIC software manages all
information around typical road load recording requirements. It handles all settings of the MOPS, the
definition of the channels to be transferred, monitored
and recorded, the online display, and the file organization.
The test administrator uses MAGIC to define the
components of the car that are under test, which are
instrumented with strain gages or accelerometers.
The test administrator then selects the proving
ground profiles to be used in the test, thus preparing
the test sequences for the driver with profile name
and the vehicle speed for the test run. The administrator can easily compose or modify the test layout.
All this information is combined into a full testing program that is then executed by the driver.
Running The Test With MAGIC
When starting the test run, the driver inputs his name
and additional comments as either predefined menu
entries or a general comment. All entries are captured in a log-file that can be inserted into the test
report. The program displays online screens for the
test driver.
On the left side of this screen, a number of function
keys are available to control the test and data recording. On top, the actual road profile is shown indicating to the driver the part of the test program to be
executed and the speed of the vehicle. The amplitude/time diagrams indicate the loads measured.
The test driver can also see in the lower diagram the
“kissing lines” that indicate whether or not the
calculation of the resolved Fz is done properly.
Whenever the wheel angle is in a position that either
Fx or Fz is vertical, it takes the full load only on this
signal vector. There are also digital displays of the
RPM of the wheel and the calculated vehicle speed.
Another digital display shows the number of wheel
rotations, which could also be drive distance in meters. The bottom indicators give the file names and
paths of the data that is recorded, and the results of
the online analysis. This could also be directly online
rain flow matrices, other bin analysis results or FFT
spectra.
The second screen gives the same function keys and
a series of bar graphs of several channels with so
called trailing pointers that indicate the maximum and
minimum per channel for the actual road segment
under test. The function keys not only allow recording
and standby but also the control of doing a specific
test segment again by pressing the “Segment Step
RS Tech & CAESAR DataSystems …
… To Road Load Data Acquisition!
Forward” or “Segment Step Back”. A “Marker” enables the driver to mark in an extra signal channel
specific events or misbehavior which occurred during
the test.
The monitoring and data recording is accomplished
online. In addition to recording the road load data,
which can also be data recorded for drive handling
tests, misuse test data, or brake testing data, online
analysis can be performed and the results displayed.
Data Acquis ition Software
The data acquisition software provides for on-line
calibration and alignment during driving on a horizontal road under non-force conditions. It also provides
for on-line supervising of the status of the wheel sensors with an on-line display and recording of any potential errors together with the data stream to disk.
Shunt Cal While Vehicle is Rolling
The setup history is kept in a spreadsheet file that
contains serial number and cal factors, which also
are stored in a memory chip in the wheel, from the
wheel electronics. The software sets the gain according to 6 axes information replicating and documenting
the test with date and time of last calibration.
Potential errors can be identified as an angle devi ation larger than a programmable amount, a mismatch
of shunt cal values during calibration, or a large zero
offset.
Online Data Screenshot
Signals Zeroed During Test Drive
All settings are stored in a protocol trace file and can
be printed out later as corner loads, zero offsets, or
shunt cal values.
It provides for on-line calculation and recording of the
resolved signals.
It has the capability of storing all signals or subsets of
the channels like resolved signals only.
Data is available for evaluation and analysis immediately after recording is finished; areas with potential
errors during the test run can be easily identified.
Post Processing and Evaluation
There are two alternatives for post processing. The
first gives the test driver a quick view of all data, just
in case he could not check all signals on the online
displays while driving. A second typical analysis is to
review the max and min values of each individual
segment of the track and to compare them with typical results from previous test runs and see if all loads
have occurred as expected. In the picture it can be
seen, that the list of the minimal and maximal values
are in bold numbers, for the segment with the extreme loads.
Data can be directly transformed into various software formats such as nCode’s DAC-format or MTS’
RPCIII format
… Excellence in Testing Technology!
A Unified Approach …
track. One shows the profile of some “pot holes” as
they were recorded and the second shows the
behavior of the vehicle on a torsional track section.
Max/Min Evaluation
Other methods of analysis can be defined and the
online results displayed in a list similar to this example, such as max hysteresis loops of a rain flow
analysis, or max frequency and amplitude of a vibration spectrum or distance, duration, deceleration and
brake pressure from a brake test.
By clicking on one of the fields in the display, the data
of this channel in the corresponding road segment
will be displayed as a time history display. The analysis program µ-Graph is started and the corresponding
data is displayed. µ-Graph is the fastest and most
user-friendly analysis and report generating software
package for road load data. The list of road segments
is shown and dragging and dropping either other signals or other road segments into the graphics can
arrange the display of the data. µ-Graph also offers
format converters for a wide range of other software
used for road load handling, fatigue analysis, such as
nCode FATIMAS, or rig control, such as MTS RPC
III, IST Rigsys, or Servotest SBF format. A MATLAB
converter is also available.
µ-Graph can be set in automatic mode to let you
compose complex sequences of analysis, and
graphic output routines that can run fully automated
and provide a series of report plots without the time
consuming interactive data handling of the operator.
The plots can be laid out as presentation plots with
graphics, bitmaps, text, tables and logos like the example shown below. New test data will just be activated and all analysis and displays are updated with
the new data. The plot shows the three forces as time
history plot and rain flow matrix plot and power spectrum of the vertical force in vehicle coordinates.
Data Report
Proving Ground Data
This plot labeled “Sample Lap” shows the three
forces in global vehicle coordinates with the proper
scaling for the individual forces represented. The
black line represents the vehicle speed calculated
online from the RPM of the wheel. The time scale
shows that one lap of the test track took about 11
min. Different surfaces of the track and different drive
speeds are easily seen. The pictures that follow on
the next page show a zoom into two areas of the
Offline Signal Display Data: Sample Lap
RS Tech & CAESAR DataSystems …
… To Road Load Data Acquisition!
CALIBRA
ALIBRATION
Calibration information can be stored on a microchip
circuit so that it can be uploaded automatically from
each WFT to the CAESAR MOPS data acquisition
system.
Data Sample: Pot Holes
Data Sample: Torsional Track
Data Quality: the “Kissing” Curves
The most challenging test is to compare the unresolved forces Fx and Fz with the resolved Fz signal.
The unresolved signals have a sinusoidal form due to
the rotation of the 6-component wheel. In a vertical
position of one of the two signals, the other is horizontal and has no contribution to the resolved Fz signal. This behavior is shown very clearly in the plot
below. It can also be shown in the online display to
give the test driver an on-going indication of the system. On the other hand, if the user wants to check
everything afterwards, he is free to record also the
unresolved signals for display and offline calculations
to give a full picture of the data quality.
Wheel Sensor under Test
RS Technologies has a state-of-the-art facility and an
experienced staff to provide complete diagnostic, repair, and calibration services for all makes of road
load and torque wheels. All torque and force calibration services are accredited by A2LA according to
ISO Guide 25 and traceable to NIST standards.
“Kissing” Curve Data
… Excellence in Testing Technology!
A Unified Approach …
GENERAL WFT SPECIFICATIONS
Nonlinearity ........................................ ±0.5% of rated output.
Non-repeatability ............................. ±0.25% of rated output.
Hysteresis ........................................... ±0.5% of rated output.
Crosstalk ............................................................... ±1% typical,
±3% Full Scale, maximum.
Excitation ..................................................................... ±15 VDC
Output (all axes) .......................... 5.00 vdc ± 0.2%, nominal.
Temperature Range............................................-25 to 150° C
Temperature Drift.................................................... 0.005%/ºC
Angle Encoder .........................................Sine/cosine resolver
Coordinates ......................................................SAE Standard.
Resolution ................. Depends on resolution of electronics
and capacity of sensor,
generally > 10 Nt for force axes;
> 1 Nm for moment axes.
Bridge Resistance ................................. Fx & Fz 525 Ohms,
Fy, Mx, My & Mz 1400 Ohms,
nominal.
Isolation Resistance ..................................... 2,000 M Ohms.
Overload Capacity ................ 50% of Full Scale on all axes
applied simultaneously, provided that
the combined load on each axis does not
exceed the overload rating for that axis.
Natural Frequency .................................................... <300 Hz.
Acceleration Tolerance ................................. Shock 50 G’s.
Environmental .......................... Dust-proof, water resistant,
short-term submersible,
corrosion resistant
SLIP RING SPECIFICATIONS
Description ...................... Anodized aluminum housing with
military specification circular
connectors with solder contacts.
Current Capacity .......................................................... 1 Amp.
RPM Rating ............................................................. 2,000 rpm.
Temperature Range ...................................... -40 to +120 °C.
Resolver Accuracy ..................................... ±15 Arcminutes.
Output Connector ........................... Bendix PT02H-14-18P.
Dimensions ...... 3.70 in. (94 mm) L x 3.50 in. (89 mm) OD.
Weight ................................................................ 2.3 Kg (5 lbs.)
TELEMETRY SPECIFICATIONS
Amplifier...................................... 6 instrumentation amplifiers
for full-bridge strain gages
Sensitivity...............................Adjusted according to sensors
Sensor Power Supply ..................................................... ±10 V
Shunt Calibration ..............50% full scale, remote controlled
High Pass Filter .. x- and z-components, 0.5 Hz, switchable
Aliasing Filter............................... 7-pol. Butterworth, 1.2 kHz
Sample and Hold ................................................Simultaneous
Sampling Rate per Channel........................................... 6 kHz
A/D Converter.................................................16 bit resolution,
separate converter per channel
Crosstalk Rotor Electronics.....................................>100 dB
Linearity Rotor Electronics....................................... < 0.01%
Analog Output ...............................................On wheel, ±10 V,
driven, 7pol. binder connector water-protected
Temperature Channel.................... 8 bit resolution, ±127 °C,
for control of the temperature
in the wheel electronics
Angle of Rotation ....................................Incremental sensor,
2048 pulses per rev,
sin- and cos -values are transferred
with time correction
Controller....................................... Microprocessor controlled,
settings are saved on EEPROM on
rotor electronics, power on-download
Remote Control Commands ........ Autozero per component
separate shunt calibration,
combined high pass setting
for x- and z-components
Data Transfer .........Infrared, axial, serial format, 1.28 Mbps
Remote Control Signal Transfer ........................... Inductive,
RS232-format, 9600 Baud
Processor Unit .......................................x- and z-components
by means of processor controlled
calculation unit, direction of
rotation is programmable
Power Supply ..................................Separate power supplies
12 V/0.5 A per wheel
Weight Rotor Electronics............................................1.15 kg
Temperature Range ............................................-20 ... +80 °C
Water Protection..........................................According to IP67
Max. Driving Speed.............................260 km/h (161.5 mph)
Synchronizer & Interface.....Per wheel 19“-plug-in module,
bus coupling via dual ported RAM
Interface to MOPS
MOPS U NIT SPECIFICATIONS
Signal Conditioning .....................................4 x 6 Component
Wheels; expandable for additional
strain gage transducers,
pressure sensors, accelerom eters,
LVDT’s, RPM or other digital
signals or data busses such as CAN
Sampling Rate per Channel...............................6 kHz typical
Resolution .......................................................................... 16 bit
Linearity......................................................................... < 0.01%
Crosstalk ......................................................................< 100 dB
Autozero, Shunt Cal, Gain .......Remote Control per RS232
ACCESSORY LIST
A complete set of accessories for mounting and setting up the system is available.
RS Tech & CAESAR DataSystems …
…To Road Load Data Acquisition!
WFT CAPACITIES
The capacities of the various WFTs are as follows.
LIGHT
P ASSENGER
CAR (LP-AL)
AXIS
FX
FZ
FY
MX
MZ
MY
D IMENSIONS
D IA.
MEDIUM TRUCK
(MT-TI)
HEAVY
TRUCK
(HT-XHA)
EXTRA
HEAVY
TRUCK
(HT-EXA)
40 K N
40 K N
60 K N
140 K N
220 K N
140 K N
(6.7 K LBF)
(9 K LBF)
(9 K LBF)
(13.5 K LBF)
(31.5 K LBF)
(49 K LBF)
(31.5 K LBF)
20 K N
30 K N
40 K N
40 K N
60 K N
140 K N
220 K N
140 K N
(4.5 K LBF)
(6.7 K LBF)
(9 K LBF)
(9 K LBF)
(13.5 K LBF)
(31.5 K LBF)
(49 K LBF)
(31.5 K LBF)
10 K N
15 K N
20 K N
20 K N
30 K N
70 K N
100 K N
70 K N
(2.25 K LBF)
(3.4 K LBF)
(4.5 K LBF)
(4.5 K LBF)
(6.7 K LBF)
(15.7 K LBF)
(22 K LBF)
(15.7 K LBF)
3 KN M
4 KN M
5 KN M
5 KN M
7.5 K N M
30 K N M
50 K N M
30 K N M
(27 K LB -I N)
(36 K LB -I N)
(45 K LB -I N)
(45 K LB -I N)
(66 K LB -I N)
(265 K LB -I N)
(442 K LB -I N)
(265 K LB -I N)
3 KN M
4 KN M
5 KN M
5 KN M
7.5 K N M
30 K N M
50 K N M
30 K N M
(27 K LB -I N)
(36 K LB -I N)
(45 K LB -I N)
(45 K LB -I N)
(66 K LB -I N)
(265 K LB -I N)
(442 K LB -I N)
(265 K LB -I N)
4.2 K N M
5.6 K N M
6.5 K N M
6.5 K N M
10 K N M
30 K N M
50 K N M
30 K N M
(37.5 K LB -I N)
(50 K LB -I N)
(60 K LB -I N)
(60 K LB -I N)
(88 K LB -I N)
(265 K LB -I N)
(442 K LB -I N)
(265 K LB -I N)
317
357
508 X 218 X
508 X 218 X
559 X 279 X
127
(20 X
127
(20 X
127
IN.)
8.6 X 5
IN.)
11 X 5
279
X
150
(11
X
5.9
X
51
MM
IN.)
4.2
279
KG.
LBS .)
MM
(11
305
X
152
MM (12 X
X
IN.)
6
71
X
X
X
241
MM (14 X
3.3
3.3
IN.)
8
6.8
KG.
5.36
(15
LBS .)
(11.7
279
MM
IN.)
X
MM (12.5 X
2.8
(11
203
X
84
X
330
IN.)
KG.
X
84
357
X
241
9.5
X
(14
X
9.5
3.3
IN.)
IN.)
KG.
12.6
LBS .)
(18
LBS .)
(27.7
(13
356
MM
MM
8.16
(14
IN.)
356
X
84
X
KG.
LBS .)
MM
(14
IN.)
IN.)
122
MM
(4.8
IN.)
W / ADAPTER DISK
122
MM
(4.8
IN.)
W / ADPATER DISK
152
ALUMINUM
TITANIUM
MM
MM
8.6 X 5
MM
(6
IN.)
W / HUB
178
MM
(7
IN.)
W / HUB ADAPTER
178
MM
(7
ALUMINUM
ALUMINUM
IN.)
W / HUB ADAPTER
TITANIUM
E x c e l l e n c e
i n
T e s t i n g
MM
(22 X
IN.)
42.6 KG.
34 KG.
(60 LBS.)
(94 LBS.)
(75 LBS.)
495
495
571
MM
IN.)
F ITS 11.25
10
MM
(19.5
X
BOLT PAT-
IN.)
F ITS 11.25
10
MM
(22.5
X
BOLT PAT-
IN.)
F ITS 13.19 X
10
BOLT PAT-
TERN
TERN
TERN
ALUMINUM
TITANIUM
ALUMINUM
*All specifications current as of March 2005.
…
MM
27.2 KG.
(19.5
ADAPTER
MATERIAL
HEAVY
TRUCK
(HT-TI)
30 K N
SIZE
MAX . H UB
MEDIUM
TRUCK
(MT-XMA)
(4.5 K LBF)
(9.25
MIN. R IM
LIGHT
TRUCK
(LT-AL)
20 K N
2
W EIGHT
P ASSENGER
CAR /LIGHT
SUV (PC-TI)
T e c h n o l o g y !
Fully Integrated Road Load Data Acquisition
RS Technologies World Headquarters
Farmington Hills, Michigan USA
More information on wheel force transducers is available from:
RS Technologies, Ltd.
24350 Indoplex Circle
Farmington Hills, Michigan 48335 USA
Telephone: 248-888-8260
FAX: 248-888-8266
Email: info@rstechltd.com
www.rstechltd.com
CAESAR DatenSysteme GmbH
Keltenring 16
82041 Oberhaching, Germany
Telephone: +49-89-613049-0
Fax: +49-89-613049-97
Email: info@caesar-datensysteme.de
www.caesar-datensysteme.de
CAESAR DataSystems, Inc.
24350 Indoplex Circle
Farmington Hills, Michigan 48335 USA
Telephone: 248-888-8268
Fax: 248-888-8269
Email: info@caesar-datasystems.com
www.caesar-datasystems.com
050412
061525-600