|
|
Type of Document Dissertation Author Ruiz Sandoval, Manuel Euripides Author's Email Address mrh@correo.azc.uam.mx URN etd-05212004-175346 Title “Smart” Sensors for Civil Infrastructure Systems Degree Doctor of Philosophy Department Civil Engineering and Geological Sciences Advisory Committee
Advisor Name Title Dr. A. Kareem Committee Member Dr. B.F. Spencer Committee Member Dr. D.J. Kirkner Committee Member Dr. L Salvati Committee Member Dr. Y. Kurama Committee Member Keywords
- agents
- smart sensors
- structural health monitoring
Date of Defense 2004-05-07 Availability unrestricted Abstract "Smart" sensors with embedded microprocessors and wireless communication linkshave the potential to change fundamentally the way civil infrastructure systems are monitored,
controlled, and maintained. A 2002 National Research Council report noted that the
use of networked systems of embedded computers and sensors throughout society could
well dwarf all previous milestones in the information revolution. Structural health monitoring
and control systems (SHM/C) represent one of the primary applications for new
sensor technologies. This dissertation explores the use of the smart sensor technology for
the SHM/C of civil infrastructure.
Following a brief introduction to smart sensor technology, a literature review of the
devices developed to date is presented. The research herein concentrates on the Mote platform
developed at the University of California at Berkeley. This platform offers for the
first time an open software/hardware environment for a broad range of smart sensing
research.
The suitability of the accelerometer on the existing Berkeley-platform for civil engineering
applications is then investigated. A new sensor board (called Tadeo) is developed
that has a high sensitivity accelerometer, a microphone, a thermistor, and photo resistor.
The accelerometer employed overcomes many of the deficiencies of the sensor on the
available boards. However, a number of the challenges still remaining are identified.
An agent-based paradigm is proposed that supports implementation of SHM/C algorithms
on networks of smart sensors. Because traditional algorithms for SHM/C assume
that data is centrally processed, they cannot be implemented directly in the distributed
computing environment employed by smart sensors. To demonstrate the efficacy of this
approach, a reference implementation of the agent-based framework is provided for a
SHM system employing the AR-ARX algorithm. Numerical examples indicate that the
framework is effective.
This initial research demonstrates the feasibility of using smart sensors for SHM of
civil infrastructure. A new sensor board is developed and shown to meet the needs of the
application. An agent-based framework for smart sensing is proposed and shown to perform
well. This research begins to lay the foundation from which the many opportunities
offered by smart sensing technology can be pursued.
Files
Filename Size Approximate Download Time (Hours:Minutes:Seconds)
28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access RuizSandovalME052004.pdf 2.70 Mb 00:12:28 00:06:25 00:05:37 00:02:48 00:00:14