Alexandria Digital Research Library

MIP-Coated Microbeam Mass Sensing Utilizing Noise Squeezing Effect in Parametric Resonance

Author:
Li, Lily Lijuan
Degree Grantor:
University of California, Santa Barbara. Mechanical Engineering
Degree Supervisor:
Kimberly L. Turner
Place of Publication:
[Santa Barbara, Calif.]
Publisher:
University of California, Santa Barbara
Creation Date:
2014
Issued Date:
2014
Topics:
Engineering, Mechanical
Keywords:
Mass Sensing
MEMS
Noise Squeezing
Microcantilever
Parametric Resonance
Bifurcation
Genres:
Dissertations, Academic and Online resources
Dissertation:
M.S.--University of California, Santa Barbara, 2014
Description:

A real-time explosive gas sensing (DNT) in atmospheric pressure utilizing the noise squeezing eect that occurs before a bifurcation event is investigated. A noise-squeezing controller based on the statistics of phase noise is implemented using high-speed Lab- VIEW eld programmable gated array. A high frequency TNT-molecularly imprinted xed-xed microbeam sensor utilizes this nontraditional sensing strategy and performs DNT sensing at various concentrations. Experiments are conducted using both noisebased and sweep-based bifurcation tracking for a direct comparison. Results demonstrate noise-based bifurcation tracking is not only capable of performing reliable frequency tracking, but also show the method is superior to the bifurcation sweep-based tracking. Over three orders of magnitude improvement in acquisition rate is achieved, and as a result, condence and precision on bifurcation frequency estimation is signi- cantly improved over the bifurcation sweep tracking method, enabling DNT sensing at concentrations much below sub-ppb (parts-per-billion) level.

Physical Description:
1 online resource (80 pages)
Format:
Text
Collection(s):
UCSB electronic theses and dissertations
ARK:
ark:/48907/f30k26pv
ISBN:
9781321202335
Catalog System Number:
990045116070203776
Rights:
Inc.icon only.dark In Copyright
Copyright Holder:
Lily Li
File Description
Access: Public access
Li_ucsb_0035N_12135.pdf pdf (Portable Document Format)