RFID tracking system speeds shipping business

摘要

A wireless tracking system now lets a big container shipping firm move containers faster through its 300-acre West Coast terminal, boosting the yard's capacity and pleasing truckers, who now spend less time searching for their loads. Think of it as RFID for gigantic metal boxes. The system consists of RFID tags with 2.4GHz radios that periodically emit a signal; another device that can trigger the tags to transmit on demand, such as at an exit gate; a network of wireless access points to triangulate the location of each tag; and server software, which handles the calculations and interfaces to back-end applications.