| 摘要 |
A system is disclosed for using passive infrared technology to analyze the thermal energy in a given space, to determine whether a person is present, and if so, whether he or she is experiencing an emergency or a normal physical state. A detector mounted on the wall or ceiling collects the thermal data. A microprocessor in a desk top control module or a personal computer determines occupant status from the data and instructs a wall-mounted indicator to activate occupant status signals. The preferred signals are: an intermittent red light and tone for emergencies, a green light for normal states, and an amber light for absences. Occupant status signals and silent alerts may be transmitted to and from other locations via a communications network. The invention also warns of possible fire danger. Additionally, it may be used to control lights and office machines and integrated with building security systems.
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