1. Convergent technologies for 1
Advance Structural Health care
Monitoring
Mascernas et al.(2009) Development of an Impendence –based
Wireless Sensor Node for structural Health monitoring.
28/02/2012
Presented by
Anup Poudel
M. Sc. in Innovative Technology Engineering
2. 2
28/02/2012
Overview
• Background and introduction of convergent technology.
• Structural Health Monitoring
• General applications
• History of wireless sensor
• Paper overview (Mascarenas et al. (2007))
• Critique of the paper
• Future convergent technologies
• Social and economic impacts of future convergent
technology.
• Conclusions
3. 3
28/02/2012
Background and introduction of convergent
technology
• Unification of science based on
unity in nature.
• Major technologies that play
roles in technological
convergence are
o Biotechnology
o Nanotechnology
o Information technology and
Figure 1 combination and
o Cognitive science integration of different technologie
4. 4
28/02/2012
Background and introduction
• Biotechnology gives the understanding the process
of life in in cellular level
• Biotechnology ,sensor technology and biomedicine
are taking place in nanoscale.
o Targeted drugs,
o biocompatible prosthesis,
o genetic engineering etc.
5. 5
28/02/2012
Background and Introduction
• Information technology enables technology to
o Acquire
o Process
o Store and
o Disseminate data into information.
• Cognitive technology deals with decision making
process by analysing both deterministic and
stochastic system.
6. 6
28/02/2012
Structural Health Monitoring
• Process of detecting and
analysing damages in the
structure.
• Needed for safety,
reliability and cost
purpose.
Figure 2 Health care monitoring
system
7. 7
28/02/2012
Structural Health Monitoring contd....
• It mainly consists of
â–« Sensors (Nanotechnology or biotechnology )
â–« Data acquisition system (Information technology)
â–« Data storage and transfer (Information
technology)
â–« Data management (Information technology)
â–« Interpretation and Diagnosis (cognitive system)
8. 8
28/02/2012
General applications
• Monitoring health condition of different aerospace,
civil and mechanical systems
• Examples
â–« Satellites and space vehicles structure monitoring
â–« Bridges structure monitoring
â–« Dams structure monitoring
â–« Buildings structure monitoring
â–« Movement of rocks and landslides formation etc.
9. 9
28/02/2012
General applications
Figure 2 Jindo Bridge in South Korea with 113 WSS
10. 10
28/02/2012
History of wireless sensor
• In 1998, Strater proposed the integration of wireless
radio with sensors to reduce cost of SHM.
• In 2003, Lynch et al. integrated microcontrollers in
wireless sensors with data processing and feature
extraction capability.
• In 2003, Tanner et al. integrated MEMS sensors with
wireless communication and embedded system.
• In 2006, Farrar et al. selected single board computer with
wireless networking .
• Spencer et al.(2004) and Lynch and Lon (2006) provided
the summaries of wireless technology with integrated
sensors with processor in SHM.
11. 11
28/02/2012
Paper overview (Mascarenas et al.(2007)
• Design of the impedance based sensor node.
• Use of high frequency ultrasonic excitations.
• The mechanical impedance is coupled with
electrical impedance of piezoelectric crystals.
12. 12
28/02/2012
Paper overview
Figure 3 Proposed node sensor
13. 13
Paper overview contd 28/02/2012
Components Functions Normal power Features
(mW)
AD5933 • Measures the electrical 33 • 1 MSPS sampling rate
impedance of the sensor. • Works on sine swipe
mode.
XBee • Wireless communication 148.5
ATmega128L, • Controlling and detection of 31.35 • 128 KB of flash memory
8 MHZ CLK structure parameter. • 4KB RAM
• Dual UART
• Two wire interface
• 8MHZ internal oscillator.
X band horn • Wirelessly receives energy. - -
antenna
Piezoelectric • Produces ultrasonic sound. - -
sensor • Receives reflected sound.
14. 14
28/02/2012
Advantage of Mascarenas design
• Size
• Cost
• Speed
• Safety
• Reduction in wiring system etc.
15. 15
28/02/2012
Critique of the paper
• New product development concept
â–« Just gives an idea.
• Handling of data
â–« In context of security purpose.
• RF microwaves
â–« High intensity exposure causes hyperthermia of the
tissue in human body.
â–« Long term exposure may cause cancer.
16. 16
28/02/2012
Future of convergent technology
• Mixed function of optical, RF, and digital in a signal
chip.
• Causes dramatic change in medical and electronic
products.
â–« Drug delivery will move from iterative to targeted.
â–« Time consuming to integrated
â–« variable to informed
â–« Uncertain to accurate
17. 17
28/02/2012
Future of convergent technology contd...
Figure 3 Future of convergent technology
18. 18
28/futer02/2012
Social and economic impacts of future
convergent technology.
• New lifestyles, work styles, and economic business
models.
• Dominant role in economic and social changes.
• Engines of future economy.
• Possibility of radical changes.
• Challenge in managing rapid and complex
technological-markets, business, economics,
and society.
• Need of interdisciplinary strategy to manage it.
19. 19
28/02/2012
Conclusion
• Four technologies are major technologies that lead to
convergent technology.
• Cost effective, energy efficient SHM monitoring
system can be designed by advancement in these
technologies.
• Convergent technology shows wide range of
application of the better human life.
• Challenges for managing it is obvious.
