Deep-freeze tracking issues

One aim of the control system for automatic cardboard box conveyor systems is to be able to perfectly identify boxes at every point in the system. In deep-freeze warehouses, however, the normal identification methods such as barcodes or RFID chips have major disadvantages, says Swisslog.

The use of barcodes and labels is problematic while directly spraying the code onto the box using an inkjet printer is also made more difficult by the low temperature, as the oil and alcohol-based inks lose their fluidity at extreme minus temperatures and the printer nozzles become blocked. RFID is technically feasible but often considered to be too expensive. For more information go to http://tinyurl.com/9qa5cz9