Motion sensor device, method for operating a motion sensor device and lighting system

A method (30) for operating a motion sensor device (10), wherein

• the motion sensor device (10) comprises a PR sensor (11) having a plurality of sensor elements (12) arranged adjacent to one another whose active sensor surfaces form a detection area (13) of the PR sensor (11) and an optical unit (15) configured to image a detection region (16) of the PR sensor (11), which detection region (16) comprises groups of detection zones (17) imaged on the detection area (13) of the PR sensor (11), said optical unit (15) being further configured to scale at least one group of the detection zones (17) in a first dimension which is aligned in a first direction and configured to scale at least one group of the detection zones (17) in a second dimension which is aligned in a second direction (19) in the detection region (16) of the PIR sensor (11), wherein the detection zones (17) have a spatially periodic arrangement with direction-dependent periodicity in accordance with the first and second directions (18, 19) which are orthogonal to one another in the detection region (16) of the motion sensor device (10) and the optical unit is further configured to superimpose the groups of the detection zones (17) in the detection area (13) of the PR sensor (11), wherein the method (30) comprises:
• imaging (31) of a detection region (16) of the PR sensor (11), which detection region (16) comprises said groups of detection zones (17) onto the detection area (13) of the PIR sensor (11);
• wherein the detection zones (17) in the detection region (16) of the PR sensor (11) have a spatially periodic arrangement with direction-dependent periodicity;
• and
• determining (32) the direction-dependent periodicity of the detection zones (17) in the detection region (16) of the PR sensor (11).