Spot Navigation

Technology

Magnets or transponders are embedded in the floor and used by the AGV as reference spots
The distance between the reference points is fixed and known to the AGV
The AGV is continuously updating its position using Dead-Reckoning technique that depends on measuring wheels rotation and steering angles
Every time the AGV crosses a reference spot, it compares the measured distance since the last reference spot with the known distance between two spots
The difference between the two distances is used to correct the AGV position

Components

Safety scanners used for obstacle detection and for positioning accuracy
Magnetic reader or RFID receiver
Wheel encoders to measure travel
Steering encoders to measure steering angles
On-board computer to control the AGV and interface with supervisory system and/or PLC system

Accuracy

Advantages