Abstract: A radar system controls accesses to an environment where a machinery can be present. Radar devices are placed along an access path to the environment. The radar devices check the presence of targets in passage regions, arranged to be sequentially met along the access path. A control unit has stored predetermined ordered entry and exit sequences of events, given by changes of the passage regions between occupied and clear. If the registered sequence matches the entry sequence, that is the passage regions are occupied in the correct order, the environment is classified as occupied, and the machinery stops working. The machinery restarts when the environment is classified again as clear, based on the registered sequence matching the exit sequence, that is the passage regions being cleared in order.

Abstract: A set of one or more radar sensors controls accesses of targets to an environment with a hazardous device. The radar sensors start the detection in a first region of interest in an access path to the environment. Upon the detection of a target, the hazardous device is commanded a first safety measure, the detection in the first region of interest is interrupted, and the detection is started at a second region of interest arranged more internally than the first region of interest. Upon the detection of a target in the second region of interest, a second safety measure is activated. Instead, in the absence of targets in the second region of interest for a predetermined time, the detection in the second region of interest is interrupted, and the detection in the first region of interest is restarted.

Abstract: A radar system controls accesses to an environment where a machinery can be present. Radar devices are placed along an access path to the environment. The radar devices check the presence of targets in passage regions, arranged to be sequentially met along the access path. A control unit has stored predetermined ordered entry and exit sequences of events, given by changes of the passage regions between occupied and clear. If the registered sequence matches the entry sequence, that is the passage regions are occupied in the correct order, the environment is classified as occupied, and the machinery stops working. The machinery restarts when the environment is classified again as clear, based on the registered sequence matching the exit sequence, that is the passage regions being cleared in order.