Abstract: A sensor for monitoring a zone with regard to the presence of at least one object includes a transmission device, a reception device and an evaluation device. The transmission device emits transmission signals into the zone to be monitored. The reception device receives detection signals that include those transmission signals that are reflected or remitted in the zone to be monitored. The evaluation device is configured to determine at least one measurement variable based on the detection signals related to at least one dimension of an object in the zone to be monitored, to determine and output an occupied state of the zone to be monitored if the at least one measurement variable is greater than an entry threshold value, and to determine and output a free state of the zone to be monitored if the at least one measurement variable is smaller than an exit threshold value.

Abstract: The method for position calibration serves to fuse images of a camera and a LIDAR sensor. The camera records an image of a calibration board, wherein the pose of the calibration board relative to the camera can be determined based on known patterns. The LIDAR sensor records an image of the calibration board, wherein a pose of the calibration board relative to the LIDAR sensor can be determined based on additional reflection regions on the calibration board. Based on both poses, images that are recorded by the camera and/or the LIDAR sensor can respectively be converted into a common coordinate system or into the coordinate system of the other image in the following. Objects that are detected in one image can thereby be verified in another image.