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Robot Employs RFID to Manage Warehouse Inventory
Fetch Robotics has built Sick RFID technology into its TagSurveyor robot, with which logistics providers and retailers can gain data about tagged inventory without requiring handheld or fixed readers.
May 09, 2018—
Several logistics companies and retailers are either piloting or deploying an RFID-enabled version of a robot that counts inventory—in some cases 24 hours a day, seven days a week—in and among personnel and moving equipment. The TagSurveyor robot, from California automation technology company Fetch Robotics, leverages UHF RFID reader technology, as well as the Freight100 robot base from sensor company Sick. The two firms demonstrated their technology at RFID Journal LIVE! 2018, held last month in Orlando, Fla.
Fetch Robotics, founded in 2014, released its first robot a year later. These autonomous machines deliver freight within warehouses and other facilities, and use sensors to navigate their routes and avoid obstacles. The company found, however, that customers could also benefit from RFID tag reading to count inventory or manage assets. Many companies, particularly those in retail and logistics, were managing items already tagged with UHF RFID tags, and didn't necessarily have the labor resources to track the locations of goods via a handheld RFID reader, or with an infrastructure of fixed readers.
The TagSurveyor robot comes with one internal Sick RFU630 RFID interrogator and three mounted RFA630 antennas, which send RF transmissions at three different angles, thereby ensuring that tags on products will be detected, even if they are stored on high shelves. The robot is designed for use in an active setting containing workers and vehicles, due to its multiple sensors that identify the surrounding conditions and enable it to negotiate its movements accordingly. That is unique, Lau says, since most RFID-enabled robots have been challenged when it comes to working around other robots, or in the presence of individuals or forklifts using standard obstacle-avoidance technology.
One key feature of the TagSurveyor system is how easy it is to set up, says Myles Blodnick, Fetch's application engineer. Users can unpack the robot and power it up, then begin walking it through a facility to create a map that is stored in the robot's onboard computer. That data can be forwarded to a cloud-based server via the robot's Wi-Fi functionality. In the cloud-based FetchCore software, users can view the map they have created and designate a path for the robot. They can then use the map to create "keep out" zones and alternative paths in the event that a primary path is obstructed.
Blodnick says he has witnessed users unpack the robot at 8 AM and have the mapping and visualization functionality completely up and running before lunch. However, Fetch typically works with customers for an additional day or two, Lau adds, to provide light training and optimization of workflow paths in order to ensure maximum tag read rates.
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