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LW-2T-20K wheel force transducer

LW-2T-20K wheel force transducer LW series

Six-axis wheel force transducer for pick-up trucks, vans and SUVs, 90 kN radial and 45 kN lateral, for 16 in and larger single or dual wheels, with slip ring transmission.

90 kN
Fx, Fz capacity
45 kN
Fy capacity
15 / 20 kN·m
Moment capacity
≤ 0.5 % FS
Non-linearity
  • OutputsFx Fy Fz · Mx My Mz
  • Also measuredX and Z acceleration (X, Y, Z on the LW50) · wheel speed and angle
  • Signal outputanalog · CAN · Ethernet · CAN FD and EtherCAT on the CT3

Wheel force transducer for pick-ups and vans, 90 kN

The LW-2T-20K measures all the wheel forces and moments on light and heavy-duty pick-up trucks, vans and SUVs. Four-arm strain gage bridges give independent signals for the vertical, lateral and longitudinal forces, up to 90 kN radial (Fx, Fz) and 45 kN lateral (Fy), and for the camber, steer and torque moments, 15 kN·m (Mx, Mz) and 20 kN·m (My). Non-linearity is 0.5 % of full scale or less, crosstalk after correction below 1 %. The weatherproof, temperature-compensated ring, Ø 374.65 × 38.10 mm, operates from −40 to 125 °C. Its amplifier package adds X and Z accelerations and an encoder resolving 0.17°.

Rim and hub adapters follow the model's design guides and keep the production wheel offset. Sixteen M14 bolts join the rim adapter and twenty-four the hub adapter, tightened crosswise to 136 N·m; the wheel is balanced once assembled. The matched amplifier and slip ring mount after the lug nuts. A restraint rod to a magnetic bracket holds the slip ring stator, or the stator angle correction device on steered wheels. The CT2 or CT3 interface box, powered at 9 to 36 V DC, runs the shunt calibration and the zero, wheel lifted and turned two revolutions.

It is used for on-road and off-road measurements in all conditions, one transducer measuring the combined loads of a dual wheel set or a single tire, and also to monitor and control laboratory tests.

Wheel force transducer with amplifier and slip ring assembly
Transducer, amplifier and slip ring. The slip ring and the telemetry package are swappable.

Specifications

LW-2T-20K
Measured quantitiesFx · Fy · Fz · Mx · My · Mz
Force capacityFx 90 · Fy 45 · Fz 90 kN
Moment capacityMx 15 000 · My 20 000 · Mz 15 000 N·m
Non-linearity≤ 0.5 % FS
Hysteresis≤ 0.5 % FS
Crosstalk≤ 1 % FS (after correction)
Angle resolution0.17°
Axes6
Sensing principleStrain gage (4-arm bridges)
Accelerometer range55 g
Signal transmissionSlip ring
Shaft diameter261.62 mm (center bore)
Mounting fasteners40 × M14 × 2.0 (threaded holes, on the hub and rim bolt circles)
Bolt circle288.29 mm
Rim bolt circle345.44 mm
DimensionsØ 374.65 × 38.1 mm
Operating temperature−40 to 125 °C
Interface boxCT2
VehiclesPick-up trucks · Vans · SUVs
Rim size16 in (and larger, single or dual)
Shown: LW-2T-20K. Download the files

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Signal transmission

By wire: amplifier, slip ring and encoder on the wheel. Not on the LW-MC-3.5K and LW12.8-50-TEL.

Options
Accessories
Your request

Unusual bolt pattern, motorsport hub, agricultural wheel: we build it around your wheel.

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