Use of encoders for zone set switching of a safety laser scanner based on linear measuring detection

Abstract

A safety laser scanner has automatic zone set switching based on its displacement from a reference position. A safety module of the safety laser scanner determines the displacement based on a first signal received from an encoder where the first signal is indicative of movement of the safety laser scanner. The safety module receives a second input when the safety laser scanner is at a reference position and that indicates zero displacement. The safety module selects one of a plurality of zone sets based on the displacement, where each zone set defines a safety zone corresponding to displacement of the safety laser scanner from the reference position. The safety laser scanner generates an output when an object is detected in the safety zone of the selected zone set. The safety laser scanner is positionable on a platform of a machine that moves relative to a stationary portion of the machine.

Dependencies are inferred from the claim text.