User's Guide

©WhereNet Corp September 2006D1312r01 WhereTrack Users Guide 28September07.doc Page 9
PTIU in
NEMA
enclosure
Optional
WP
Whip
antenna
Compass, STHO,
Ultra Sonic senso
r
The GPS Master Station is critical to the operation of the GPS solution. It will consist of a pair of GPS units and will
require the customer to provide DC power derived from redundant DC power supplies whose AC input is backed up by
UPS.
WhereNet has completed preliminary testing of the quality of UTR GPS locates in a Marine Terminal environment.
While not conclusive, the tests indicate that the GPS will be the predominant source of locates over a large area of the
sites, with RTLS locates being used primarily to augment GPS as necessary, such as along the Berth.
WNC CHE Installations
This section highlights how the WhereTrack WNC and PTIU are integrated onto the various CHE.
UTR
A UTR is a ‘utility tractor’ or ‘yard truck’ designed to connect or
‘latch’ onto chassis or bomb carts. Container are placed and
removed from these chassis or bomb carts. A sample UTR is
shown in the adjacent photo. Two UTR manufacturers, Capacity
and Ottawa (owned by Kalmar) capture the majority of the US
UTR market. Variations among manufacturers and specific
models exist and their impact on the specific installation of the
WNC, PTIU, and sensors are the responsibility of the customer.
The PTIU is housed inside a NEMA enclosure that is installed on
the back side of the unit. The UTR configuration almost
universally includes the use of so called ‘Top Hat’ that is
installed over the roof of the UTR. The top hat houses an ultra sonic sensor, a compass, an STHO WhereTag with an
external 5’ whip antenna, and an optional WherePort. It is shown in the following photos.
In a new Gen2 installation, a UTR will no longer have a separate STHO WhereTag, as its function will be performed by
the WNC. In addition, PACECO and WhereNet will investigate the use of alternate sensors on the UTR, including the
current ultra sonic sensor and compass. The ultra sonic sensor may be replaced by a different type of sensor, or a different
model of ultra sonic sensor, or it may be kept intact. The compass will be replaced by a similar unit but less expensive
unit.