Ref: LW150

6 Axis Wheel Force Transducer - 150 kN - Class 8 Trucks

3 moment and 3 force measurements in real driving conditions
Force capacities: Fx, Fz: 150 kN, Fy (lateral): 750 kN
Moment capacity: 40 kNm
Measures X & Z accelerations
Signal output : Analog, CAN, CANFD, optional EtherCAT
Adapts to 19.5 inch and larger wheels
Environmentally protected
Temperature compensated
Rugged stainless steel construction
Tested to SAE J328 fatigue strength standard
Swappable slip ring or telemetry system for signal transmission
ISO-17025 calibration certificate included
rental option available

Presentation

The LW150 Wheel Force Transducers (WFT) is used to measure forces and moments on class 8 trucks and large off-road vehicles. It provides independent output signals for vertical, lateral, and longitudinal forces as well as camber, steer and torque moments. Being completely weatherproof, it's are ideal for on-road and off-road measurements in all conditions.

Specification

Maximum Force Capacity, [Fx, Fz] (radial)	150 kN
[Fy] (lateral) at Tire Patch	75 kN
Maximum Torque Capacity [Mx, My, Mz]	40 KNm
Accelerometer range	55g
Sensor	4 arm strain gage bridges
Nonlinearity	≤ 0,5% of full scale output
Hysteresis	< 0,5 % of full scale output
Cross Axis Sensitivity after correction	< 1% of full scale output
Temperature Range, Operating	-40°C to 177°C
Angular Resolution	0.17°
Weight	20.9 kg

Installation, Signal processing and data transmission

The transducer LW150 outputs :

3 forces
3 moments
2 accelerations X and Z
wheel speed and position

Analog, CAN and CANFD output are offered. The raw signals are amplified in the amplifier mounted on the transducer, then sent to the conditionning module CT3 through the slip ring assembly.

Transducer + amplifier and slip ring	Conditionning module CT2

CT3 Transducer Interface Box:

Performs real-time coordinate transformation and crosstalk compensation
Easy to use Zero, Shunt Calibration, and Bridge Power Off functions
Simultaneous Analog, CAN, & Ethernet signal outputs
Embedded web page enables user to change set-up options, move WFT measurement origin, view transducer static values, create .dbc file

Amplifier and Slip Ring Package:

Internal X & Z accelerometers
High resolution encoder for position & speed measurement
Internal smart chip contains all calibration, zero, & shunt values
Provides signal conditioning & amplification to the transducer strain gage signals
Digitizes Transducer, Encoder, & Accelerometer signals
Supports slip ring

Installation on Vehicle / Spinning application

The matching Amplifier / Slip Ring package easily mounts onto the transducer. It amplifies and digitizes the transducer signals before they pass through the slip ring. The installation on the wheel is completed through a dedicated wheel rim (single or twin) and hub.

Single rim wheel	Twin rim wheel double

Installation on Test Rig / non-spinning application

The wheel force transducer supports installation through flanges or hubs on test rig as well, spinning or not spinning.

Setup

The system configuration and setup is completely done within a simple webbrowser on a PC or laptop connected to the CT3 over LAN. no additional Software is needed. Web interface