Passive infrared detection system with three-element, single-cha

Details Passive infrared detection system with three-element, single-cha Passive infrared detection system with three-element, single-cha

1988-05-02

1989-09-05

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250342, 250349, G01J 520

Patent

active

048641367

ABSTRACT:
A passive infrared detection system embodies a new three-element, single-channel, pyroelectric detector. For a given amount of motion by a target in a region under surveillance, the detector provides more complex signature information than conventional two-element detectors, thereby allowing the target to be more readily distinguished from spurious environmental or background sources. Owing to the geometry of the detector electrodes, the false-alarming effects produced by spurious stimuli common to all detector elements are reduced. The detector is particularly adapted for use in infrared detection systems of the type which use pulse-counting techniques to distinguish targets of interest from non-targets.

REFERENCES:
patent: 3453432 (1969-07-01), McHenry
patent: 3703718 (1972-11-01), Berman
patent: 4225786 (1980-09-01), Perlman
patent: 4284888 (1981-08-01), Appleby
patent: 4612442 (1986-09-01), Toshimichi
patent: 4614938 (1986-09-01), Weitman
patent: 4764755 (1988-08-01), Pedtke et al.

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