Smoke detection method and system
First Claim
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1. A smoke detection method, comprising:
- detecting plural successive smoke level samples;
increasing a smoke detection ramp count for each successive smoke level sample that does not decrease from a previous one;
resetting the smoke detection ramp count whenever a smoke level sample decreases relative to a previous one; and
triggering a smoke detection alarm whenever the smoke detection ramp count exceeds a predetermined threshold.
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Abstract
A smoke detection method includes ramp-counting of non-decreasing smoke level samples for detecting smoldering fire conditions and counting of obscuring smoke level samples for detecting other-than-smoldering fire conditions. The ramp-counting of non-decreasing smoke level samples includes increasing a smoke detection ramp count for each successive smoke level sample that does not decrease from a previous one and resetting the smoke detection ramp count whenever a smoke level sample decreases relative to a previous one.
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Citations
11 Claims
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1. A smoke detection method, comprising:
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detecting plural successive smoke level samples; increasing a smoke detection ramp count for each successive smoke level sample that does not decrease from a previous one; resetting the smoke detection ramp count whenever a smoke level sample decreases relative to a previous one; and triggering a smoke detection alarm whenever the smoke detection ramp count exceeds a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A smoke detection method, comprising:
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ramp-counting non-decreasing smoke level samples for detecting smoldering fire conditions; and counting obscuring smoke level samples for detecting other-than-smoldering fire conditions. - View Dependent Claims (8, 9, 10, 11)
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Specification