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LW65 wheel force transducer

LW65 wheel force transducer LW series

Six-axis wheel force transducer for passenger cars, SUVs and light-duty trucks, 65 kN radial, 35 kN lateral and 10.5 kN·m, IP67, with slip ring or telemetry.

65 kN
Fx, Fz capacity
35 kN
Fy capacity
10.5 kN·m
Moment capacity
≤ 0.2 % FS (forces, My)
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 cars and SUVs, 65 kN

The LW65 measures all the wheel forces and moments on passenger cars, SUVs and light-duty trucks, with X and Z accelerations up to ±100 g. It is rated 65 kN (14,500 lb) on Fx and Fz, 35 kN (7,850 lb) on Fy and 10.5 kN·m (7,700 lbf·ft) on all three moments, for a static weight of 1,320 kg. Non-linearity is 0.2 % of full scale or less on the forces and My, cross-axis sensitivity after correction 0.4 % or less. The IP67 transducer operates from −40 to 177 °C and adapts to 12 in and larger wheels; angular resolution is 0.17°.

Twenty-four M10 × 1.5 screws pass through the transducer into the rim adapter and twenty-four more fasten the hub adapter, torqued crosswise to 81 N·m; design guides give both adapters. With the slip ring, the amplifier carries a 20-circuit slip ring with a 512-pulse encoder, its stator held by a restraint rod or a stator angle corrector. With telemetry, a factory-mated telemetry and encoder ring feeds an inboard stator set with an alignment tool, and the CT2-TEL box supplies the induction power.

Its IP67 design suits the harshest track and off-road measurements, and non-spinning applications that monitor and control laboratory test rigs. A Michigan Scientific video shows its telemetry set fitted to the front hub of a car.

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

Specifications

LW65
Measured quantitiesFx · Fy · Fz · Mx · My · Mz
Force capacityFx 65 · Fy 35 · Fz 65 kN
Moment capacityMx 10 500 · My 10 500 · Mz 10 500 N·m
Max static load1 320 kg
Non-linearityFx ≤ 0.2 · Fy ≤ 0.2 · Fz ≤ 0.2 · Mx ≤ 0.4 · My ≤ 0.2 · Mz ≤ 0.4 % FS
HysteresisFx ≤ 0.25 · Fy ≤ 0.45 · Fz ≤ 0.25 · Mx ≤ 0.45 · My ≤ 0.25 · Mz ≤ 0.45 % FS
Crosstalk≤ 0.4 % FS (after correction)
Angle resolution0.17°
Axes6
Accelerometer range100 g (X and Z)
OutputAnalog voltage · CAN · Ethernet · EtherCAT (EtherCAT available)
Signal transmissionSlip ring · Telemetry (slip ring outboard; telemetry inboard)
Operating temperature−40 to 177 °C
ProtectionIP67
Interface boxCT2
VehiclesPassenger cars · SUVs · Light trucks
Rim size12 in (and larger)
Shown: LW65. 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.

Resources

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