(WIM) System Integrated with Nondestructive Evaluation (NDE) - - PowerPoint PPT Presentation

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(WIM) System Integrated with Nondestructive Evaluation (NDE) - - PowerPoint PPT Presentation

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Next-Generation Wireless Bridge Weigh-in-Motion (WIM) System Integrated with Nondestructive Evaluation (NDE) Capability for Transportation Infrastructure Safety Yang Wang Georgia Institute of Technology Nasim Uddin University of Alabama

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Next-Generation Wireless Bridge Weigh-in-Motion (WIM) System Integrated with Nondestructive Evaluation (NDE) Capability for Transportation Infrastructure Safety

Yang Wang Georgia Institute of Technology Nasim Uddin University of Alabama Birmingham Laurence J. Jacobs Georgia Institute of Technology Jin-Yeon Kim Georgia Institute of Technology University Transportation Centers Conference for the Southeastern Region April 4, 2013

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  • Participants
  • Motivation and preliminary research
  • Objective and progress
  • Next-phase for the future

Outline

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Participants

  • Georgia Tech team: wireless sensing and ultrasonic

nondestructive evaluation (NDE)

  • Dr. Yang Wang (PI)
  • Dr. Laurence J. Jacobs (Co-PI)
  • Dr. Jin-Yeon Kim (Co-PI)
  • Dapeng Zhu (Graduate Student)
  • Canny Fang (Graduate Student)
  • Kevin Arne (Graduate Student)
  • UAB team: bridge weigh-in-motion (WIM)
  • Dr. Nasim Uddin (Co-PI)
  • Dr. Hua Zhao (Post-Doctor)
  • Dr. Zhisong Zhao (Previous Graduate Student)
  • Li Dong (Graduate Student)
  • Rahul R Kalyankar (Graduate Student)
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ASCE 2009 Ratings on America’s Infrastructure

Subject GPA Comments Roads D -

  • Poor road conditions cost each US motorist

$333 per year in repairs and operating costs Bridges C

  • 26% the nation's 600,000 bridges rated

structurally deficient or functionally obsolete Dams D

  • 4,000 deficient dams, including 1,819 high

hazard potential dams

I-35W Bridge Collapse Minnesota, August 2007 13 Casualties Teton Dam Collapse Idaho, June 1976 Damage: $2 billion

Highway and bridges (per Year)

  • Current spending: $70.3B
  • $78.8B needed to

maintain current conditions

  • $186B needed to improve

to good conditions

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Current Practice for Bridge Inspection

Basket Lift Extensive Climbing Rigging

  • Inspection to a bridge is conducted once every two years, as required

by Federal Highway Administration (FHWA)

  • Current practice is visual inspection using hammers and chisels
  • Need for structural systems that can autonomously monitor their conditions
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Wireless Sensor Units Embedded Sensors Central Data Server (CDS) Coaxial Cables

Communication Network: from Wired to Wireless

 Installation of wired system can take about 75% of total testing time for large

  • structures. (Straser and Kiremidjian, 1998)

 $5,000 per sensor channel, half of the cost on cabling and labor. (Celebi, 2002)  Over 1,000 sensors on Tsing Ma Bridge, Kap Shui Mun Bridge, and Ting Kau

  • Bridge. 36 km of copper cable and 14 km of fiber optic cable. Over one year of
  • installation. (Solomon et al., 2000)
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Wireless Ultrasonic NDE for Crack Detection (GT-1)

Microprocessor evaluation board Excitation output amplification board Receiving signal conditioning board Wireless transceiver

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Testing with Steel and Concrete (GT-2)

Diffuse ultrasonic NDE for concrete specimen Steel specimen with various notches mimicking damage Wedge ultrasonic transducer

Concrete bridge component Transmitter Receiver Wireless device Surface crack

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Project Background (UAB-1)

BWIM shema

SiWIM Bridge Weigh-in-motion system

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Project Background (UAB-2) Spider FAD (free-of-axle- detector) sensors

  • n slab

Weighing sensors on girder

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Project Objective

Sensor Signal Digitization Analog-to-Digital Conversion Computational Core Wireless Communication 900MHz or 2.4GHz Wireless Transceiver Weigh-in-motion (WIM) sensors External Memory Micro- Processor Sensor Signal Conditioning Amplification, filtering, and voltage-offsetting Output Signal Amplification Amplification and voltage-offsetting Transmitting ultrasonic transducer Receiving ultrasonic transducer

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Hardware Development (GT)

Hardware design and prototyping finished Hardware design finished; prototyping underway

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Identified Strain Transducer (GT+UAB)

Specification ST350 Gage length 3 in Strain resolution ~1με Strain range ±2000με Circuit Full Wheatstone bridge with 4 active 350Ω foil gages Supply voltage 1~10V Full-range linearity error 1% Sensitivity 2 (μV/V) / με

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Ultrasonic NDE (GT)

  • 0.5

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4

Amplitude(V) Depth of the notches(mm) 5MHz 50MHz

Amplitude #1 #2 #3 #4

Undamaged

0.5mm 1.2mm 3.2mm 2.3mm undamaged

Steel specimen with different notch depth

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Bridge WIM (UAB)

A2+A3 GVW A1 A2 A3 A4 A5 Single A4+A5

  • 50
  • 40
  • 30
  • 20
  • 10

10 20 30 40 50 Percentage error (%) SiWIM algorithm Proposed algorithm item

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Future: Wireless Drive-By Inspection

Drive-by bridge inspection system Portable bridge weigh-in-motion Bridge safety management

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