Environmental abnormality detecting apparatus
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United States of America Patent
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-
Jan 20, 1987
Grant Date -
N/A
app pub date -
Dec 12, 1984
filing date -
Dec 13, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An environmental abnormality detecting apparatus for detecting abnormality in atmosphere such as heat, smoke, and a gas. A sampling circuit is provided for periodically sampling analog signals from a detector for detecting these phenomena. A quantizer quantizes sampled signals with step levels. An accumulator having a plurality of counters provides different accumulation times corresponding to the step levels. Reliability in accumulation effect is not degraded, and an abnormality signal can be detected in a short period of time when a degree of abnormality is high.
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