Safer in robotized welding cells with ELOshield
Safe interaction of humans and robots at KIRCHHOFF

The Solution
Pedestrian modules interact with the welding cells

The ELOshield radio-based proximity identification system was identified as the best product from ELOKON’s range for this application. ELOshield automatically detects the presence of people within specifically defined areas - configurable as warning zones or protection zones according to customer requirements. It can also actively influence control systems to deactivate dangerous robot movements, and in case of a standstill, prevent its unwanted reactivation.

In Kirchhoff’s case, the usual signal that a robot can be activated is a closed and locked cell door - an open door automatically prevents operation. But this is not 100% failsafe and neither is human behaviour: one person may enter the cell but another employee, not able to see or realise that an operative is inside, may close it from the outside. Both scenarios can reactivate the robot.    

ELOshield’s combination of pedestrian modules worn or carried by operators and antennas positioned at various points create zones in specifically defined areas. It continuously detects and signals the presence of operators in and around the cell. If anyone is left inside, the antenna module communication prevents the activation of the welding process even if the door has been closed and locked. The presence of a person inside the cell is additionally signalled by warning lights placed outside it.