Cargo and Untethered Trailer Tracking
Untethered trailer tracking is one solution that addresses the efficiency
and security problems previously cited. This solution is comprised
of a set of communications and computer technologies for tracking
a trailer independent of a truck tractor. UTT systems require a
power source and power management strategy for long periods of
inactivity, since trailers are stored in terminals for periods
of weeks or months. Typically, a UTT system uses satellite-tracking
Global Positioning System (GPS) technology, supplemented by either
satellite or cellular communications technologies. As shown in
Figure 1, a variety of in-transit events can be monitored by the
UTT system, thus providing a means to integrate the trailer assets
into a trucking company's overall logistics management system.
There are an estimated 2.5 to 3 million dry van trailers in the
United States today; however, only about 2 percent have UTT systems.
The
deployment of UTT technologies is expected to increase significantly
in the near future, since several UTT systems are currently in
the marketplace. Some of these UTT systems include:
- QUALCOMM's
TrailerTRACS
- General Electric's VeriWise
- Geogolic Solution's TrailerMax
- Terion's FleetView 3 Trailer Management
System
- SkyBitz's Global Location System
- TransCore's GlobalWave
- Teletouch Communication's VisionTrax
- AirlQ's Refrigerated Trailer
Tracking Solution
A UTT system generates trailer position information
with every message and status report, which is provided
to a dispatcher's computer. The untethered
trailer
positioning information is collected through various
sensor devices that monitor the trailer to which they are attached.
Position information can
be user-configured
to be generated and sent at predetermined time intervals,
and it can also be generated and sent upon demand from
the
dispatcher's
computer. The position
reporting
frequency is configurable, and the UTT terminal has a
store and
forward capability.
| Automatic vehicle location (AVL) - Using GPS, vehicle location is determined for tracking, monitoring and exchanging information with vehicles in the field.
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GPS - Global Positioning System; a "constellation" of 24 well-spaced satellites that orbit the Earth and make it possible for people with ground receivers to pinpoint their geographic location
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