1. Stick Scanner Image example Procedures Insert stick scanner to a drilled hole and turn adjuster to scan image

2. Stick Scanner Wayne

3. Stick Scanner Image Processing Overlapping intersection Surface Image synthesis Binarizati on If the depth of hole is deeper than the length of sensor: Extract course aggregate to determine the degree of segregation ① ②

4. ① check bar location ② preliminary drilling φ14.5m m 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

5. Application (1) RC HW bridges diagnostic 4.3mm Retrofitted mortar depth verification Existing concrete Polymer cement Mortar layer ① Polymer cement Mortar layer ② 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

6. Bridge Pier Diagnostic Alkali Silica Reaction Application （２） ・ Crack depth, crack width ・ Carbonation depth ( phenolphthalein) ・ to predict crack occurrence （ ASR ）

7. HW bridge’s pier diagnostic Earthquake resistance retrofitted pier Application （３） ・ Crack depth, crack width ・ Carbonation depth ・ Crack occurrence prediction （ transient temp/shrinkage ）

8. Drainage pumping station ASR diagnostic Application （ 4 ）

9. 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

10. 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 ◎ ◎ 10 The developed Line Scanner Sensing Device is practical for bridge monitoring application ◎

11. Telecentric (deflection) ◎ 11 Beam web

12. Telecentric (strain) ◎ 12 ◎

13. ◎ 13 ◎ Stencil guide base box

14. Telecentric ◎ 14 Lower flange strain microphone stethoscope Web deflection Telecentric (deflection)

15. ◎ 15 ◎ mm Compared to laser measurement: +/- 3mm

16. Telecentric (strain) ◎ 16 ◎ microstrains Compared to strain gauge : +/- 60 microstrains

17. Easily cleaned up with no markings ◎ 17 ◎ Magnetic studs Easily pried off with hand tool

18. 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 ◎ ◎ 18 They are practicable for bridge monitoring applications ◎

19. 19 Application to a bridge at Osaka Japan Not influenced by external brightness Easy to set scanning direction 4800dpi 19 Features :

20. 20 Application of Line Scanner Sensor in evaluating concrete actual stress Stress released method Specimen （ PC T-beam)

21. 21 Procedure ① ② ③ ④

22. 22 Scanned image examples Resolution: 1200dpiTo have a better sharpness effect, Grey spray was used Horizontal45°diagonalVertical