Air quality monitoring system and enhanced spectrophotometric chemical sensor
AssigneeProject Canary, Pbc
InventorsAnna Ailene Scott, Yan Azdoud, Christopher Daniel Kelley
Life of this patent
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Abstract
In an illustrative configuration, a method for monitoring air quality is disclosed. The method includes accepting analyte gas into a cell and reflecting light rays into the analyte gas repeatedly across the cell into at least one sensor. The light scattered by particulate matter in the analyte gas and amount of spectra-absorption due to presence of a gaseous chemical is then measured. Based on the determined amount of spectra-absorption and the measured scattered light the gaseous chemical is then measured.
Claims20
An air quality monitoring method comprising:
- accepting analyte gas into a cell;
- emitting light rays into the analyte gas;
- reflecting the light rays into the analyte gas repeatedly across the cell;
- directing the light rays across a path within the cell into at least one sensor in response to repeated reflections;
- measuring, by one of the at least one sensor, light scattered by particulate matter in the analyte gas;
- determining, by one of the at least one sensor, amount of spectra-absorption due to presence of a gaseous chemical;
- and
- measuring the gaseous chemical based on the determined amount of spectra-absorption and the measured scattered light.
An air quality monitoring method comprising:
- accepting analyte gas into a cell;
- emitting light rays into the analyte gas;
- reflecting the light rays into the analyte gas repeatedly across the cell;
- directing the light rays across a path within the cell into at least one sensor in response to repeated reflections;
- measuring light scattered by particulate matter in the analyte gas;
- determining amount of spectra-absorption due to presence of a gaseous chemical;
- and
- identifying the particulate matter based on the measured scattered light and the determined amount of spectra-absorption.
A sensor for monitoring air quality comprising:
- means for accepting analyte gas;
- means for emitting light rays into the analyte gas;
- means for reflecting the light rays into the analyte gas repeatedly;
- means for directing the light rays across a path into at least one of a spectrophotometric and a nephelometer detector after repeated reflections;
- means for measuring light scattered by particulate matter in the analyte gas;
- means for determining amount of spectra-absorption due to presence of a gaseous chemical;
- and
- means for measuring the gaseous chemical based on the determined amount of spectra-absorption and the measured scattered light.
A sensor for monitoring air quality comprising:
- means for accepting analyte gas;
- means for emitting light rays into the analyte gas;
- means for reflecting the light rays into the analyte gas repeatedly;
- means for directing the light rays across a path into at least one of a spectrophotometric and a nephelometer detector after repeated reflections;
- means for measuring light scattered by particulate matter in the analyte gas;
- means for determining amount of spectra-absorption due to presence of a gaseous chemical;
- and
- means for identifying the particulate matter based on the measured scattered light and the determined amount of spectra-absorption.
Dependencies are inferred from the claim text.