US Patent 10198706 Operator identification and performance tracking

A system for identifying and tracking performance of operators in a warehouse. The system comprises at least one robot configured to interact with the operators in the warehouse. The at least one robot includes a first transceiver, a proximity detector, and a memory. The first transceiver defines a zone surrounding the robot and the proximity detector is coupled to the first transceiver. The proximity detector is configured to detect entry, into the zone, of an operator and to detect exit of the operator from the zone. The memory contains information identifying said operators who have entered and exited the zone.