Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2007-02-13
2007-02-13
Hannaher, Constantine (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
C250SDIG001
Reexamination Certificate
active
10893040
ABSTRACT:
Apparatus for passive infrared sensing of an intruder that discriminates between signals corresponding to a human target and much larger signals may include first and second IR sensors, at least a first amplifier having a first voltage operating range. The first amplifier may be connected to the first IR sensor and the apparatus may further include at least a second amplifier having a second voltage operating range. The second amplifier may also be connected to the first IR sensor and the apparatus may further include a comparator for comparing the respective outputs of the first and second amplifiers to predetermined values. The invention also includes the method for differentiating between a signal caused by human target and a signal caused by other much larger by IR sources which includes providing at least a first IR sensor, providing at least a first amplifier connected to the first IR sensor, providing a second amplifier connected to the first IR sensor having a second operating range, comparing the outputs of said first and second amplifiers to predetermined values to differentiate between the output from a sensor corresponding to the maximum signal for human target and a signal that is larger than the maximum signal from a human target.
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patent: 5703368 (1997-12-01), Tomooka et al.
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Beninati John F.
Hannaher Constantine
Honeywell International , Inc.
Smith Robert S.
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