Stick Scanner

Image example

Procedures

Insert stick scanner to a drilled hole and turn adjuster to scan image

Stick ScannerWayne

Stick Scanner

Image Processing

Overlapping intersection

Su

rfac

e

Su

rfac

e

Su

rfac

e

Image synthesis

Binarization

If the depth of hole is deeper than the length of sensor:

Extract course aggregate to determine the degree of segregation

①②

① check bar location

② preliminary drilling

φ14.5mm

③ Diamond bit

φ24.5mm

④ Ultra sonic cleaner

⑤ drying

⑥ Scanning ⑦ Repair

Diagnostic Procedures

Stick Scanner

Diamond core bit

Guide tip

Drilling

Application (1)RC HW bridges diagnostic

4.3mm

Retrofitted mortar depth verification

Existing concrete

Polymer cementMortar layer①Polymer cementMortar layer②

Web’s additional thickness Web’s lower additional thickness

Surface

・ Verify the thickness of each mortar layer・ Verify laminated layer condition・ Verify carbonation depth・ Evaluate crack distribution, crack width

Bridge Pier Diagnostic

Alkali Silica Reaction

Application （２）

・ Crack depth, crack width・ Carbonation depth (phenolphthalein)・ to predict crack occurrence （ ASR ）

HW bridge’s pier diagnostic

Earthquake resistance retrofitted pier

Application （３）

・ Crack depth, crack width・ Carbonation depth・ Crack occurrence prediction （ transient temp/shrinkage ）

Drainage pumping station

ASR diagnostic

Application （ 4 ）

Recommendation

Increasing number of over-serviceability structures

Demand in structural deterioration diagnoses

Documentation and data base

High precision test and long term monitoring archive provide efficient

maintenance strategy

Telecentric (deflection)

The repeatability and the accuracy of the Line Scanner Sensing were confirmed

It is applicable to several types of constructional material such as wood, steel and concrete

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10

The developed Line Scanner Sensing Device is practical for bridge monitoring application

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Telecentric (deflection)

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11

Beam web

Telecentric (strain)

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12

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Telecentric (strain)

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13

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Stencil guide

base

box

Telecentric

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14

Lower flange strain

microphone

stethoscope

Web deflection

Telecentric (deflection)

Telecentric (deflection)

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15

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mmCompared to laser measurement: +/- 3mm

Telecentric (strain)

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16

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microstrains

Compared to strain gauge : +/- 60 microstrains

Easily cleaned up with no markings

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17

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Magnetic studs

Easily pried off with hand tool

Concluding remarks

The repeatability and the accuracy of the full field optical monitoring devices were verified

They are applicable to several types of constructional material such as wood, steel and concrete

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18

They are practicable for bridge monitoring applications

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19

Application to a bridge at Osaka Japan

Not influenced by external brightnessEasy to set scanning direction

4800dpi 19

Features:

20

Application of Line Scanner Sensor in evaluating concrete actual stress

Stress released method変化分 拡大

X

Y

Z

8.7.

6.5.

4.3.

2.1.

0.-1.

-2.

-3.-4.

-5.-6.

-7.

-8.

-9.-10.

-11.-12.

-13.

-14.-15.

-16.

V1L1C2G2

Output Set: LINEAR COMBINATIONContour: Plate Top Minor Stress

1 : L I N E A R C O M B I N A T IO N , P l a t e T o p Y N o r m a l S t r e s s

- 1 5 .

- 1 4 .

- 1 3 .

- 1 2 .

- 1 1 .

- 1 0 .

- 9 .

- 8 .

- 7 .

- 6 .

- 5 .

- 4 .

- 3 .

- 2 .

- 1 .

0 .

1 .

- 1 0 0 . - 9 0 . - 8 0 . - 7 0 . - 6 0 . - 5 0 . - 4 0 . - 3 0 . - 2 0 . - 1 0 . 0 .

X C o o r d i n a t e S y s t e m 0

縦方向

=10穴の半径

1 : L IN E A R C O M B I N A T IO N , P l a t e T o p M i n o r S t r e s s

- 1 .

0 .

1 .

2 .

3 .

4 .

5 .

6 .

7 .

8 .

- 1 0 0 . - 9 0 . - 8 0 . - 7 0 . - 6 0 . - 5 0 . - 4 0 . - 3 0 . - 2 0 . - 1 0 . 0 .

Y C o o r d in a t e S y s te m 0

=100幅の半分

A

B

A B

8N/ mm2分の分布荷重

X

Y

Z

8.

7.

6.5.

4.3.

2.

1.0.

-1.-2.

-3.-4.

-5.-6.

-7.

-8.-9.

-10.-11.

-12.

-13.

-14.-15.

-16.

V1L1C2G2

Output Set: LINEAR COMBINATIONContour: P late Top Minor Stress

Specimen （ PC T-beam)

21

Procedure

① ②

③ ④

22

Scanned image examples

Resolution: 1200dpiTo have a better sharpness effect, Grey spray was used

Horizontal 45°diagonalVertical