WTT – Wheel Torque Transducer

Wheel Torque Transducer WTT-Dx
Acquire drive and output torques directly at the wheel

In automotive development, it is important to know the exact torques acting on the vehicle – especially under acceleration and braking maneuvers. With the WTT-Dx wheel torque transducer, a high-precision tool is available for making such measurements. The WTT detects the mechanical load directly where it is produced: the wheels that form the interface between the vehicle and the road.

At a glance:

  • Precise measuring of drive and braking torque directly at the wheel
  • Cable-free data transmission via Dx telemetry to Dx receiver unit in the vehicle
  • Synchronous data acquisition from up to four WTTs with a single receiver unit
  • Replaceable battery with up to 80 h running time
  • Operating temperature -10 °C to +60 °C, with optional special battery -30 °C to +60 °C
  • Waterproof according to IP67 protection rating
  • Comfortable software-controlled zero calibration and measurement start
  • Analog and CAN interface

Technical data

WTT-DX wheel torque transducer

Parameter Value
MEasurement value torque in axial direction M y
Signal transmission digital-telemetric
Measurement range My= 8,75 ±6000 Nm, optional, My = ±3000 Nm
Bandwidth max. 1 kHz
Linearity <0.5%
Hysteresis <0.5%
Crosstalk <0.5%
Sensor weight ca. 4.75 kg (incl. telemetry unit)
ca. 6.3 kg (with battery)
Sensor housing material Aluminium
Mechanical load stress analysis according to AK-LH-08 4.34
Rim diameter min. 13″
Hub diameter with adapter max. 6″
Operating temperature -10° C up to +60° C (standard battery)
-30° C up to +60° C (special battery)
Max. driving speed 250 km/h
Max. rpm 2300 rpm
Shock proof 100 g
Protection rating IP67(waterproof)
Mounting and balancing yes (wheel bolts accessible)
Power Supply standard battery: up to 80 h
special battery: up to 40 h

Telemetry receiver RCI

Telemetry properties Value
Power Supply 9 to 36 V DC
Power Consumption <5 W
Frequency freely-configurable in the 868 MHz band (optional 2.4 GHz)
Synchronization synchronized sampling of up to 4 WTTs
CAN output (connection according to ISO 11898, galvanically isolated) CAN 2.0b, standard & extended-identifier freely-programmable up to max. 1 MBaud
Analog Output 6 x BNC sockets, (freely-assignable, output signal max. ±10 V)
Ethernet 10/100 Mbit
Auto-zero remote-controllable
Temperature range -20 °C up to +65 °C
Dimension ca. 170 mm x 130 mm x 53 mm
Weight 0.8 kg