SPLIT FIELD-OF-VIEW UNCOOLED INFRARED SENSOR

摘要

An occupancy sensor (50) having a primary infrared radiation sensor (12) and a secondary infrared radiation sensor (14) in an integrated vacuum package having a window (52) that provides separate fields of view to the sensors, respectively. The primary sensor is fox monitoring occupancy of a selected space. The secondary sensor is for monitoring the background radiation of the space. Signals from the primary and secondary sensors are electronically processed and compared, and the occupancy level of the selected space is determined. Temperature and visible light sensors may also be incorporated. Sensor information is used to control temperature, ventilation, lighting and other parameters of the selected space.