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US 6,687,640 B1Granted
Airborne agent concentration analysis
AssigneeSandia Corporation
InventorFred Gelbard
Life of this patent
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AssigneeSandia Corporation
InventorFred Gelbard
Estimating the term…
A method and system for inferring airborne contaminant concentrations in rooms without contaminant sensors, based on data collected by contaminant sensors in other rooms of a building, using known airflow interconnectivity data. The method solves a least squares problem that minimizes the difference between measured and predicted contaminant sensor concentrations with respect to an unknown contaminant release time. Solutions are constrained to providing non-negative initial contaminant concentrations in all rooms. The method can be used to identify a near-optimal distribution of sensors within the building, when then number of available sensors is less than the total number of rooms. This is achieved by having a system-sensor matrix that is non-singular, and by selecting that distribution which yields the lowest condition number of all the distributions considered. The method can predict one or more contaminant initial release points from the collected data.
A method of inferring airborne contaminant concentrations in interconnected rooms without sensors from data collected by sensors located in other interconnected rooms of a building, the method comprising:
A method of determining a near-optimal distribution of contaminant sensors in rooms of a building, wherein the number of contaminant sensors is less than the number of rooms in the building, comprising determining a sensor placement distribution having a system-sensor matrix, M, that is non-singular.
A method of determining a near-optimal distribution of contaminant sensors in rooms of a building wherein the number of contaminant sensors is less than the number of rooms in the building, comprising determining a sensor placement distribution having a system-sensor matrix, M, that is non-singular, wherein determining the sensor placement distribution comprises determining a sensor placement distribution having the lowest condition number of all sensor placement distributions considered.
A system for inferring airborne contaminant concentrations in interconnected rooms without sensors from data collected by sensors located in other interconnected rooms of a building, the system comprising:
A system for determining a near-optimal distribution of contaminant sensors in rooms of a building, wherein the number of contaminant sensors is less than the number of rooms in the building, wherein the system comprises:
Dependencies are inferred from the claim text.