LW12.8-50-TEL wheel force transducer
Six-axis telemetry wheel force transducer for passenger cars and light-duty trucks, 50 kN radial and 25 kN lateral, with induction-powered electronics built into the transducer.
- 50 kN
- Fx, Fz capacity
- 25 kN
- Fy capacity
- 6.5 kN·m
- Moment capacity
- ≤ 0.2 % FS (Fx, Fz, 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
Telemetry wheel force transducer for cars, 50 kN
The LW12.8-50-TEL measures all the wheel forces and moments on passenger cars and light-duty trucks. Its 4-arm strain gage bridges are rated 50 kN (11,200 lb) on Fx and Fz, 25 kN (5,600 lb) on Fy and 6.5 kN·m on all three moments, with non-linearity of 0.2 % of full scale or less on Fx, Fz and My. The telemetry and induction power electronics are packaged into the weatherproof transducer, 6.0 kg with them. Data is sent at 2,200 Hz with 16-bit resolution, the wheel angle resolved to 0.25°. It operates from −40 to 125 °C and adapts to 14 in and larger wheels.
The stainless steel or titanium hub adapter and the rim adapter bolt to the transducer with M10 screws torqued to 81 N·m; narrow-head screws from Michigan Scientific fit the rim side. The telemetry stator, which holds the receiver, induction coil and encoder pick-ups, mounts inboard on an adjustable bracket, set with an alignment tool. The CT2-TEL box, powered at 10 to 36 V DC, supplies the induction power, zeroes the transducer and transforms the loads; the wheel comes off without removing the electronics.
With no cable through the hub, it is used to test vehicles on snow and ice, where the transducer stays at the wheel in the cold and the wet.
Specifications
| Measured quantities | Fx · Fy · Fz · Mx · My · Mz |
|---|---|
| Force capacity | Fx 50 · Fy 25 · Fz 50 kN |
| Moment capacity | Mx 6 500 · My 6 500 · Mz 6 500 N·m |
| Non-linearity | Fx ≤ 0.2 · Fy ≤ 0.5 · Fz ≤ 0.2 · Mx ≤ 1 · My ≤ 0.2 · Mz ≤ 1 % FS |
| Hysteresis | ≤ 1 % FS |
| Crosstalk | ≤ 1 % FS (before compensation) |
| Angle resolution | 0.25° |
| Axes | 6 |
| Sensing principle | Strain gage (4-arm bridges) |
| Sensitivity variation over a revolution | ≤ 1 % FS |
| Rated output | 0.8 mV/V |
| Output | Analog voltage · CAN · Ethernet |
| Bandwidth | 0.2 kHz (< −0.1 dB; 500 Hz at < −1.0 dB) |
| Sample rate | 2.2 kHz |
| Resolution | 16 bit (1.8 N · 0.27 N·m) |
| Signal transmission | Telemetry |
| Supply voltage | 10 to 36 V (about 2.0 A at 13.5 V DC) |
| Power source | Induction |
| Shaft diameter | 198.02 mm (center bore) |
| Mounting fasteners | 18 × Ø 9.91 mm |
| Rim fasteners | 12 × Ø 9.91 mm |
| Bolt circle | 213.26 mm |
| Rim bolt circle | 324.97 mm |
| Fatigue tested to | SAE J328 |
| Dimensions | Ø 340.18 × 25.64 mm |
| Weight | 6 kg (with telemetry electronics) |
| Operating temperature | −40 to 125 °C |
| Operating temperature, stationary electronics | −20 to 60 °C (CT2-TEL) |
| Interface box | CT2-TEL |
| Vehicles | Passenger cars · Light trucks |
| Rim size | 14 in (and larger) |
Request a quote
Unusual bolt pattern, motorsport hub, agricultural wheel: we build it around your wheel.
Resources
Datasheets and manuals
Drawings
CAD models
None for LW12.8-50-TEL.
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.
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