Passive infrared movement sensor arrangement with sensor arranged with respect to coverage lobe of other sensor such that central axes of coverage lobes cross each other in Fresnel lens arrangement

摘要

The arrangement has at least two sensor elements (3) which are arranged in an inclination angle smaller than 90 degrees with respect to the main surface of the circuit board (2). At least one of the sensor elements is so arranged with respect to the coverage lobe (14,15,16) of the other sensor element that the central axes (11,12,13) of the coverage lobes of at least two sensor elements crosses each other inside the housing (1) of a Fresnel lens arrangement.