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US Rt 23 Wayne Bridge Test. US Rt 23 Wayne Bridge Test. S. Paul Sumitro, Ph.D, PE Chris Roney www.smart-structures.com. Leading the technology in Structural Health Monitoring. Presentation outline. Presentation outline. What Smart Structures is Innovative sensory technology

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us rt 23 wayne bridge test
US Rt 23 Wayne Bridge Test

US Rt 23 Wayne Bridge Test

S. Paul Sumitro, Ph.D, PE

Chris Roney

www.smart-structures.com

Leading the technology in Structural Health Monitoring

presentation outline
Presentation outline

Presentation outline

  • What Smart Structures is
  • Innovative sensory technology
    • Smart Scanner
    • Stick Scanner
    • Telecentric (deflection)
    • Telecentric (strain)
slide6

KRC Japan – Smart Structures USA

Wayne Bridge Rt. 23 NJ

June 10 -11, 2011

slide8

Full-field Optical Monitoring Techniques

- Smart Scanner: strain, stress

- Stick Scanner:

investigate internal concrete structures

- Telecentric:

- Strain

- deflection

8

overview
OVERVIEW
  • As the first step to evaluate bridge’s condition, field load test is needed to assure bridge’s safety level
  • Troublesome in load test:
  • - Sensor installation;
  • - cabling

9

smart scanner
Smart Scanner
  • Non-destructive and non-contact:
      • No scaffolding, no attachment , no cabling;
  • Speedy and appropriate information:
      • not only point-wise data, but also planar information;
  • No image-warp: constant focus and constant distance;
  • High resolution:
      • surface strain measurement,
      • user-friendly software based on digital image correlation method.

10

slide11

Wide range

Simple and low cost

Line Sensing Scanner

Resolution: 4800dpi

Constant brightness

(fix attachment,

no external effect)

Flat head Image Scanner

11

slide12

Flat Head Image Scanner

CIS (Contact Image Sensor)

No lens (no aberration)

Light, compact, low cost

Primary Scanning direction

Secondary Scanning Direction

The resolution in secondary direction is lower than primary direction

×

glass

Line sensor

Light Source

Driving shaft (motor, guiderail, timing belt)

12

slide13

Sub set(N×N)

Sub set (N×N)

Pixel

Digitalized

Pre-deformed

Pre-deformed

Pre-deformed

Scanner

Deformed

Range

Deformed

Deformed

Digitalized Image Correlation Analyses

13

slide14

Concrete

Wood

Steel

14

slide15

Full field scanner sensor

高さ調節ネジ

Line sensor

turnable

Rotary table

ラインセンサ

shield

Fixer

Full-field Scanner

15

slide16

Smart Scanner

Primary dir

Rear

Front

Leg

Focal digital meter

Window

Thermometer(surface)

Secondary

Micrometer adjuster

Thermometer(sensor)

Battery

Line sensor

Linear encoder

Scanning bar

Stepping motor

slide19

Studs and mounts

Measured data

Studs

Mounts

19

stick scanner

Stick Scanner development

Handy scanner

Stick Scanner

Development background

Core

○Material analyses

×structural destructive

Combine pros

×crack broken core

Endoscope

Full field investigation, small drilled hole

○low cost, constructability

○Micro destructive

×Narrow field

stick scanner specifications
Stick Scanner specifications

Compact model

Ver.3

Adjuster

Spec

Sensor

①Range:350mm

②Resolution:600dpi

Tablet PC

③Weight:+/- 1kg

④Interface:USB

Ver.4:SD card

Ver.4

⑤Scan length:

Ver.3=105mm

Adjuster

Sensor

Ver.4=210mm

guide

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