Abstract: A sensor arrangement comprises an arrangement of light curtains, and a trigger generator which cyclically generates trigger signals. Each trigger signal is transmitted to the light curtains, wherein a measuring operation is started following a delay time in each light curtain as a result of the trigger signal that is received.

Abstract: The invention relates to a light curtain for detecting objects within a monitored region. The light curtain comprises an arrangement of transmitters that emit light rays, an arrangement of receivers for receiving the light rays, and an evaluation unit. Object detection signals are generated in the evaluation unit in dependence on the receiving signals present at the outputs of the receivers. The light curtain is divided into sub-regions containing a specified number of transmitters and receivers. The individual sub-regions can be adjusted individually through separate parameter settings. A separate evaluation is realized in the evaluation unit for the individual sub-regions.

Abstract: A light curtain to detect objects within a monitored region comprises an arrangement of transmitters that emit light rays, an arrangement of receivers for receiving the light rays, and an evaluation unit in which an object detection signal is generated in dependence on signals present at an output of the receivers. The transmitters and the receivers are activated via output lines of an arrangement of computing units, wherein the computing units make it possible to freely select points in time for activating individual transmitters and receivers.

Abstract: A method for optically monitoring an object within a monitoring area includes transmitting light rays with a light transmitting unit that form a line of light on the object. The line of light reflected from the object is imaged on an array of receiving elements that detects the reflected line of light and produces receiving element signals that correspond to measuring points on the object. The receiving element signals are evaluated to structure a distance profile of the object using a triangulation principle. The evaluating includes generating at least one evaluation window which covers in a first direction a local region extending along the line of light and in a second direction a distance range, and using the measuring points located farthest outside within the evaluation window for a left limit point and a right limit point for determining object data.