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.

 

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Teleseminar tips:
Automatic vehicle location (AVL) - Using GPS, vehicle location is determined for tracking, monitoring and exchanging information with vehicles in the field. 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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