Swift sensor setup for data collection, Swift sensor setup for data collection 56 – MTS WIFT Mini Transducer Interface User Manual
Page 56
SWIFT
®
Mini TI
56
SWIFT Sensor Setup for Data Collection
Installation
SWIFT Sensor Setup for Data Collection
To ensure accurate data collection, complete this setup procedure daily before
you begin testing.
The accuracy of the data that you collect depends on the ability of the SWIFT
electronics to “zero out” the forces and angles present in an initial, unloaded
state. During the Zero process, the TI box reads the transducer bridge values and
compensates for any offsets so that the bridge output is 0 at 0.0 V. It also reads
the current angle and compensates for any offset from the Z axis facing up.
You can ensure the success of the Zero procedure by taking these simple
precautions:
Do not touch or bump the wheel while the transducer is zeroing (after you
have pressed the Zero button).
Touching or bumping the wheel will add loads to the transducer, resulting in
an erroneous zero reading.
After pressing the Zero button, avoid all contact with the wheel until the
transducer zeroing at the current angle is complete. If you suspect that the zero
process is incorrect, begin again.
This zero method samples all eight input bridges at four 90° intervals (that is at
0°, 90°, 180°, and 270°). After the data is taken, all eight input channels are
analyzed for signal offsets, and the X and Z input channels are analyzed to
determine the angular zero point.
The following procedure assumes:
•
The transducers have been properly installed on the vehicle and the TI boxes
have been connected to the transducers and a power source. See
“Transducer Interface Electronics Installation”
•
Ensure that the connector that attaches the signal cable to the top of the
slip ring is secured with high quality duct or electrical tape.
This will prevent dust, dirt, and water from entering the connector and
causing wear on the pins and sockets
•
The calibration file for each transducer has been edited, as required, for the
angle mode and polarity, and the calibration files have been downloaded to
the TI boxes. See
Zero the TI
When you zero the TI, you want the vehicle to be fairly level and the transducer
to be as close to plumb as practical.
CAUTION