Motion detector having asymmetric zones for determining direction of movement and method therefore

A system for sensing motion within a detection region, the system comprising:

• a detector having:
• a detection element;
• a focusing element aiming received energy corresponding to a presence within the detection region toward the detection element, the focusing element having a plurality of sections in which each of the plurality of sections establishes a corresponding detection zone within the detection region, the plurality of sections being arranged to allow a motion vector to be determined for an object passing through the detection region, the plurality of sections further arranged to establish at least two asymmetric detection zones;
• the detector generating an electrical pulse each time presence in a detection zone is detected;
• and
• a central alarm panel in electrical communication with the detector, the central alarm panel receiving the electrical pulse generated each time presence in a detection zone is detected, the central alarm panel including a processor, the processor evaluating the timing between electrical pulses to determine the motion vector.