Design and Characterization of a Modular On-Board Vehicle Aerosol Particle Sizer Andrew Vize, University of Vermont, Master’s Candidate Electrical Engineering.

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Presentation transcript:

Design and Characterization of a Modular On-Board Vehicle Aerosol Particle Sizer Andrew Vize, University of Vermont, Master’s Candidate Electrical Engineering Matt Casari, University of Vermont, Master’s Candidate Electrical Engineering Advisors: Jeff Frolik Ph.D, Britt Holm é n Ph. D

Outline Introduction  Research Objective  Purpose Theory of Operation  Components of the Preliminary Sensor Design Current State of Research Questions

Introduction So, what’s the problem?  We need a submicron particle sizing sensor that is: Very Portable ( On-Board Vehicle or Personal Monitoring) Low Power (Powered by Batteries) Low Cost (Widespread Monitoring) Why should we care about submicron particles?  The human lungs are susceptible to particles of this size range [1] Alveolar Region of the Lungs Performs Gas Exchange Particle Deposition Without Re-Entrainment 1. Dr. Chang-Yu Wu. Allen, Anne. "Aerosol Science & Engineering". University of Florida. February 12, 2009.

Theory of Operation System Overview  Charge Particles with a Corona Ionizer  Inject Sheath Air  Deflect Particles in a Static Electric Field  Measure Charge Transfer with a Flexible Printed Circuit Board  Modular Design Promotes Ease of Cleaning & Repair

Theory of Operation Charging Particles with a Corona Ionizer Corona surrounded by a cloud of drifting free electrons Charged Particles Uncharged Particles Polydisperse Particulate Flow

Theory of Operation Injecting Sheath Gas  Sheath Module Envelopes Corona Module

Theory of Operation

Deflect Charged Particles in an Electric Field  Large Negative Potential on Center Electrode  Negatively Charged Particles Forced Away From Electrode Through Sheath Gas

Theory of Operation Use of the Flexible Printed Circuit Board  Constitutes a “Disposable Sensor Element”  Added Benefit of Striated Monodisperse Particle Deposits for Later Chemical Analysis pbc-togo.com

Current State of Research Literary Research Nearly Completed Particle Trajectory Modeling Corona Ionization Optimization Experiment Geometric Design and Modeling Electronic Amplification and Digital Storage Scheme Noise Reduction Scheme Looking Forward  Characterization  End User Documentation

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