Systems Approach to Evaluating Sensor Characteristics for Real-Time Monitoring of High-Risk Indoor Contaminant Releases

Systems Approach to Evaluating Sensor Characteristics for Real-Time Monitoring of High-Risk Indoor Contaminant Releases

TitleSystems Approach to Evaluating Sensor Characteristics for Real-Time Monitoring of High-Risk Indoor Contaminant Releases
Publication TypeJournal Article
Year of Publication2006
AuthorsPriya Sreedharan, Michael D Sohn, Ashok J Gadgil, William W Nazaroff
JournalAtmospheric Environment
Volume40
Issue19
Pagination3490-3502
Date Published06/2006
ISSN13522310
Keywordsbayes monte carlo, buildings, chemical sensor, inverse modeling, sensor system
Abstract

Rapid detection of toxic agents in the indoor environment is essential to protecting building occupants from accidental or intentional releases. While there is much research dedicated to designing sensors to detect airborne toxic contaminants, little research has addressed how to incorporate such sensors into a monitoring system designed to protect building occupants. To design sensor systems, sensor designers must quantify design tradeoffs, such as response time and accuracy, to optimize the performance of an overall system. We illustrate the importance of a systems approach for properly evaluating such tradeoffs, using data from tracer gas experiments conducted in a three-floor unit at the Dugway Proving Grounds, Utah. We apply Bayesian statistics to assess the effects of various sensor characteristics, such as response time, threshold level and accuracy, on overall system performance. We evaluated the system performance by the time (and thus amount of data) needed to characterize the release (location, amount released, and duration). We demonstrate that a systems perspective is necessary to understand the potential benefits of selecting values of specific sensor characteristics to optimize sensor system performance.

DOI10.1016/j.atmosenv.2006.01.052
Short TitleAtmospheric Environment
Refereed DesignationRefereed