LW55 wheel force transducer
Six-axis wheel force transducer for forklift trucks, other heavy vehicles with small wheels and scooters, 55 kN radial and 25 kN lateral, sealed to IP67, with a swappable slip ring or telemetry package.
- 55 kN
- Fx, Fz capacity
- 25 kN
- Fy capacity
- 5.9 kN·m
- Moment capacity
- ≤ 0.25 % FS (Fx, Fz)
- Non-linearity
- OutputsFx Fy Fz · Mx My Mz
- Also measuredX and Z acceleration (X, Y, Z on the LW50 and LW55) · wheel speed and angle
- Signal outputanalog · CAN · Ethernet · CAN FD and EtherCAT on the CT3
Forklift wheel force transducer for small wheels, 55 kN
The LW55 measures all the wheel forces and moments on forklift trucks, other heavy vehicles with small wheels and scooters: vertical, lateral and longitudinal forces, and camber, steer and torque moments, with X, Y and Z accelerations up to ± 100 g. It is rated 55 kN (12,364 lbf) on Fx and Fz, 25 kN (5,620 lbf) on Fy and 5.9 kN·m (4,348 lbf·ft) on all three moments, for a maximum recommended static weight of 1,120 kg. Non-linearity and hysteresis are 0.25 % of full scale or less on Fx and Fz, 0.5 % on My, 0.75 % on Mx and Mz and 1.0 % on Fy; cross-axis sensitivity after correction is 0.4 % or less. The IP67 transducer weighs 2.57 kg, operates from −40 to 177 °C and adapts to 8 in and larger wheels. Dual wheel configurations are available.
The signals leave the wheel through an outboard slip ring or an in-board telemetry package, swappable on the same transducer. With the slip ring, the amplifier package mounts onto the transducer: it amplifies and digitizes the strain gage signals before the slip ring, carries the X, Y and Z accelerometers and a high-resolution optical encoder for position and speed, and keeps the calibration, zero and shunt values on a removable smart chip. The telemetry package transmits without contact and reads position and speed with a magnetic encoder; its stator, mounted close to the rotating telemetry ring, holds the receiver, the encoder pick-ups and the induction primary coil. Angular resolution is 0.17°.
The CT3 box performs coordinate transformation and crosstalk correction in real time, with zero, shunt calibration check and zero angle set-up. It outputs CAN FD, CAN 2.0 and Ethernet, with EtherCAT and analog outputs as optional modules, and is configured from an embedded web page over USB. Spinning, the IP67 transducer suits the harshest track and off-road measurements; non-spinning, it monitors and controls laboratory test rigs. For heavier forklifts on 10 in and larger wheels, the LW9.5-HS is rated 93 kN.
Specifications
| Measured quantities | Fx · Fy · Fz · Mx · My · Mz |
|---|---|
| Force capacity | Fx 55 · Fy 25 · Fz 55 kN |
| Moment capacity | Mx 5 900 · My 5 900 · Mz 5 900 N·m |
| Max static load | 1 120 kg |
| Non-linearity | Fx ≤ 0.25 · Fy ≤ 1 · Fz ≤ 0.25 · Mx ≤ 0.75 · My ≤ 0.5 · Mz ≤ 0.75 % FS |
| Hysteresis | Fx ≤ 0.25 · Fy ≤ 1 · Fz ≤ 0.25 · Mx ≤ 0.75 · My ≤ 0.5 · Mz ≤ 0.75 % FS |
| Crosstalk | ≤ 0.4 % FS (after correction) |
| Angle resolution | 0.17° |
| Axes | 6 |
| Sensing principle | Strain gage |
| Accelerometer range | 100 g (X, Y and Z) |
| Output | CAN FD · CAN · Ethernet · EtherCAT · Analog voltage (CAN 2.0; EtherCAT and analog with optional modules) |
| Signal transmission | Slip ring · Telemetry (slip ring outboard; telemetry in-board) |
| Weight | 2.57 kg |
| Operating temperature | −40 to 177 °C |
| Protection | IP67 |
| Interface box | CT3 |
| Vehicles | Forklift trucks · Heavy vehicles with small wheels · Scooters |
| Rim size | 8 in (and larger) |
Request a quote
Unusual bolt pattern, motorsport hub, agricultural wheel: we build it around your wheel.
Resources
Datasheets and manuals
Drawings
None for LW55.
CAD models
None for LW55.
Related applications
-
Durability Wheel loads on the road Three forces and three moments at each wheel, recorded while the vehicle is driven. -
Dynamics Vehicle dynamics The forces and moments at each wheel while the vehicle brakes, turns and changes lane. -
Dynamics Side slip angle Side slip angle read without contact by an optical sensor, on a wheel or on the vehicle body. -
Test rig Road simulators The loads measured at the wheel on the road, and the proof that the simulator reproduces them.
If a six-axis wheel is not what you need
- Torque only TW series wheel torque transducers
Drive and brake torque My at the wheel, 237 N·m to 81 kN·m.
- Signals from the series wheel Wheel instrumentation system
Strain gages, thermocouples and wheel speed, on the wheel the vehicle already has.
- Force on a part, not a wheel TR3D-B three-axis load cells
Three orthogonal forces from 1.1 to 71 kN per axis.
A question on this product?
Vehicle, wheel size, expected loads. An application engineer answers.
More details to give? Use the full contact form.