SMART LOOKDOWN FUNCTION SWITCH DESIGN FOR INTRUSION DETECTORS

摘要

A system including a security system that protects a secure geographic area and a passive infrared (PIR) detector of the security system that detects intruders within the secured area, a pyroelectric element carried by the PIR detector, the pyroelectric element being tilted downwards towards a floor within the secured area to receive and detect a predominant portion of energy from an area extending outwards PIR detector and directly in front of the PIR detector and a relatively small portion of energy from a floor area directly below the PIR detector and a pivoting door having a first and second positions mounted below and directly adjacent the pyroelectric element, the door pivoting upwards to a first position where the relatively small portion of energy is blocked and pivoting downwards where the relatively small amount of energy is transmitted onto the pyroelectric element.

主权项

1. An apparatus comprising:
a base plate for a passive infrared (PIR) detector adapted for attachment via a rear surface to a wall; a pyroelectric element mounted to a front surface of the base plate, the pyroelectric element being tilted downwards to receive and detect a predominant portion of energy from an area extending outwards and directly in front of the PIR detector and a relatively small portion of energy from an area directly below the PIR detector; a Fresnel lens mounted in front of the pyroelectric element that transmits the predominant portion of energy from the area directly in front of the PIR element onto the pyroelectric element; a lookdown window mounted below the pyroelectric element that transmits the relatively small portion of energy from the area directly below the PIR detector onto the pyroelectric detector; and a pivoting door having a first and second positions mounted below the pyroelectric element between the lookdown window and pyroelectric element, the door pivoting upwards to a first position where the relatively small portion of energy is blocked and pivoting downwards where the relatively small amount of energy is transmitted onto the pyroelectric element.