Convergent technologies for

Advance Structural Health care

Monitoring

Mascernas et al.(2009) Development of an Impendence –based

Wireless Sensor Node for structural Health monitoring.

Presented by

Anup Poudel

M. Sc. in Innovative Technology Engineering

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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

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Background and introduction of convergent

technology

• Unification of science based on

unity in nature.

• Major technologies that play

roles in technological

convergence are

oBiotechnology

oNanotechnology

o Information technology and

oCognitive science Figure 1 combination and integration of different technologies

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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.

oTargeted drugs,

obiocompatible prosthesis,

ogenetic engineering etc.

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Background and Introduction

• Information technology enables technology to oAcquire

o Process

o Store and

oDisseminate data into information.

• Cognitive technology deals with decision making

process by analysing both deterministic and

stochastic system.

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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

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Structural Health Monitoring contd....

• It mainly consists of

▫ Sensors (Nanotechnology or biotechnology )

▫ Data acquisition system (Information technology)

▫ Data storage and transfer (Information technology)

▫ Data management (Information technology)

▫ Interpretation and Diagnosis (cognitive system)

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General applications

• Monitoring health condition of different aerospace,

civil and mechanical systems

• Examples

▫ Satellites and space vehicles structure monitoring

▫ Bridges structure monitoring

▫ Dams structure monitoring

▫ Buildings structure monitoring

▫ Movement of rocks and landslides formation etc.

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General applications 28/02/2012

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Figure 2 Jindo Bridge in South Korea with 113 WSS

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.

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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.

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Paper overview 28/02/2012

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Figure 3 Proposed node sensor

Paper overview contd Components Functions Normal power

(mW)

Features

AD5933 • Measures the electrical

impedance of the sensor.

33 • 1 MSPS sampling rate

• Works on sine swipe

mode.

XBee • Wireless communication 148.5

ATmega128L,

8 MHZ CLK

• Controlling and detection of

structure parameter.

31.35 • 128 KB of flash memory

• 4KB RAM

• Dual UART

• Two wire interface

• 8MHZ internal oscillator.

X band horn

antenna

• Wirelessly receives energy. - -

Piezoelectric

sensor

• Produces ultrasonic sound.

• Receives reflected sound.

- -

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Advantage of Mascarenas design

• Size

• Cost

• Speed

• Safety

• Reduction in wiring system etc.

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Critique of the paper

• New product development concept

▫ Just gives an idea.

• Handling of data

▫ In context of security purpose.

• RF microwaves

▫ High intensity exposure causes hyperthermia of the

tissue in human body.

▫ Long term exposure may cause cancer.

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Future of convergent technology

• Mixed function of optical, RF, and digital in a signal

chip.

• Causes dramatic change in medical and electronic

products.

▫ Drug delivery will move from iterative to targeted.

▫ Time consuming to integrated

▫ variable to informed

▫ Uncertain to accurate

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Future of convergent technology contd...

Figure 3 Future of convergent technology

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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.

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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.

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