High sensitivity apparatus and method with dynamic adjustment fo

Details High sensitivity apparatus and method with dynamic adjustment fo High sensitivity apparatus and method with dynamic adjustment fo

1995-01-05

1997-03-18

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340501, 340511, 340507, G08B 2300

Patent

active

056126743

ABSTRACT:
A noise immune detection system includes a plurality of detectors that generate respective indicia representative of adjacent ambient conditions. A communications link extends between the detectors. A control element is coupled to the link to receive and process the indicia and to adjust an alarm threshold level in response to noise levels in the system. Respective indicia are filtered twice by the control element. In the presence of noise, as reflected in relative values of the filtered values of the indicia, the threshold value is automatically increased.

REFERENCES:
patent: 4785283 (1988-11-01), Yuchi
patent: 4916432 (1990-04-01), Tice et al.
patent: 5471194 (1995-11-01), Guscott

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