Method and system for human presence correlation using carbon dioxide
US9470670B2 · kind B2 · utility
5Cited by
3References
9Claims
0Family size
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Key dates
| Filing date | Mar 14, 2013 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | Feb 19, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and system for detecting and/or quantifying recent human presence in an environment using a calculated rate of decay of carbon dioxide concentration levels within that environment. A sensor measures the change in carbon dioxide levels over time to calculate the rate of decay to equilibrium and extrapolate recent human presence. Also provided is a method and system for quantifying recent human activity in an environment using the calculated rate of decay to equilibrium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.