MTS SWIFT 10 ATV Sensor - Manual (Page 21)

Construction
SWIFT 10 ATV Sensors Hardware Overview 21
Inner hub adapter
The inner hub adapter attaches to the inner diameter of the transducer and the
spindle face of the vehicle. The inner hub adapter enables you to maintain the
original position of the tire on the vehicle (the tire will not protrude from the
vehicle) while the transducer is attached to the vehicle.
Components Set Up for Test Track
Slip-ring bracket The slip-ring bracket attaches the slip ring to the transducer. It has internal wiring
that provides excitation power to the strain gage bridges and brings signals out
from the transducer to the slip ring.
Encoder
An encoder measures the angular position of the transducer. The SWIFT sensor
encoder is integrated into the slip ring assembly, and counts off “ticks” to
measure the angular position as the wheel rotates. It measures 2048 (512 pulse
quadrature) points per revolution (ppr) with a resolution of 0.18 degrees.
Slip ring
The slip ring allows you to output the transducer bridge signals and angular
position to the TI. A transducer data cable attaches from the slip ring to the back
panel of the TI.
Anti-rotate device The anti-rotate device is attached to the slip ring and the vehicle’s suspension (or
other non-rotating point). It is able to move up and down with the vehicle. Its
primary function is to provide a fixed reference point for the angle sensor. Its
secondary function is to prevent the cable from rotating with the wheel and
becoming tangled or breaking.
The slip ring and anti-rotate device are used mainly for road data collection.
Although it can also be used for short periods of time on a road simulator. MTS
does not recommend this use. Due to the extreme fatigue loading characteristics
of durability testing on road simulators, we suggest that you either remove the
slip ring assembly before installing the vehicle on a road simulator, or use it only
for iteration passes, then promptly remove it.
Anti-Rotate
Assembly
Slip Ring
and Encoder
Slip Ring
Bracket
Alternate
Spindle Hub
Interface
(for hub piloted
spindle)
Coupling Teeth
Interface
Transducer
Interface
Cable
Washer
Plate
Transducer
Vehicle
Spindle Hub
Inner
Hub Adapter
Anti-Rotate
Mounting Bracket
(customer supplied)
S10-04