The LW150 measures the three forces and three moments at the wheel: vertical, lateral and longitudinal forces, camber, steer and torque moments. It is designed for the front axle of class 8 trucks. Internal X and Z accelerometers complete the measurement.
Within the vehicle width
The LW150 has a thin design. With inboard telemetry, the assembly stays within the vehicle width, which suits on-road testing. The IP67 construction also covers track and off-road measurements.
Slip ring or telemetry
Signal transmission is swappable:
- Outboard slip ring: the amplifier package mounts onto the transducer and amplifies and digitizes the signals before they pass through the slip ring. Wheels of 19.5 in and larger.
- Inboard telemetry: non-contact transmission, induction power. Wheels of 22.5 in and larger.
Specifications
- Force capacity: 150 kN radial (Fx, Fz), 75 kN lateral (Fy).
- Moment capacity: 40 kN·m on Mx, My and Mz.
- Maximum recommended static load (Fz): 4 400 kg.
- Nonlinearity and hysteresis ≤ 0.5 % of full scale; crosstalk after correction ≤ 1.0 % of full scale.
- Accelerometers ±100 g; angular resolution 0.17°.
- Operating temperature −40 to 177 °C; transducer mass 20.9 kg.
The CT3 interface box
The CT3 performs the coordinate transformation and crosstalk compensation in real time. It outputs CAN FD, CAN 2.0 and Ethernet; analog and EtherCAT outputs are available with optional modules. An embedded webpage, reached over USB, sets up the system, moves the measurement origin and creates the .dbc file.