MTS SWIFT 50 GLP Sensor Heavy Trucks - Manual (Page 19)

Construction
SWIFT 50 GLP Sensors Hardware Overview 19
Spindle adapter spacer
The spindle adapter spacer attaches to the inner diameter of the transducer,
allowing you to place it at the original position of the spindle face of the vehicle.
The spindle adapter spacer 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. In addition, the spindle adapter spacer helps
minimize brake heat from being transferred to the transducer.
Components Set Up for Test Track
Slip-ring bracket
The slip-ring bracket is used to attach 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
uses an optical encoder, integrated into the slip ring assembly, that counts off
“ticks” to measure the angular position as the wheel rotates. It measures 2048
(512 plus quadrature) points per revolution (ppr) with a resolution of 0.18
degrees and an accuracy 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. The slip ring is not used for non-spinning applications.
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 optical encoder. Its
secondary function is to prevent the cable from rotating with the wheel and
becoming tangled or breaking.
Dual Rim Configuration Front Rim Configuration
Slip Ring
Slip Ring
Anti-Rotate
Assembly
Anti-Rotate
Assembly
SWIFT 50
Transducer
SWIFT 50
Transducer
Tire Tire
Tire
Spindle
Adapter
Spacer
Spindle
Adapter
Spacer
Anti-Rotate
Mounting Bracket
(customer supplied)
Anti-Rotate
Mounting Bracket
(customer supplied)
Slip-Ring
Bracket Slip Ring
Bracket
Transducer
Interface
Cable
Transducer
Interface
Cable
S50-004a
Slip-Ring
Extension
Bracket
(Component configuration is typical. Your specific
configuration might vary slightly.)