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Stick Scanner

Stick Scanner. Procedures. Insert stick scanner to a drilled hole and turn adjuster to scan image. Image example. Stick Scanner. Wayne. Stick Scanner. Image Processing. Image synthesis. If the depth of hole is deeper than the length of sensor:. Surface. ①. ②. Binarization.

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Stick Scanner

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

  2. Stick Scanner Wayne

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

  4. Guide tip Stick Scanner Diagnostic Procedures φ24.5mm φ14.5mm ① check bar location ② preliminary drilling ④ Ultra sonic cleaner ③ Diamond bit ⑥ Scanning ⑤ drying ⑦ Repair Diamond core bit Drilling

  5. Application (1) RC HW bridges diagnostic Retrofitted mortar depth verification Web’s additional thickness Web’s lower additional thickness Existing concrete Polymer cement Mortar layer① Polymer cement Mortar layer② Surface 4.3mm ・Verify the thickness of each mortar layer ・Verify laminated layer condition ・Verify carbonation depth ・Evaluate crack distribution, crack width

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

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

  8. Application（4） Drainage pumping station ASR diagnostic

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

  11. Telecentric (deflection) ◎ Beam web 11

  12. Telecentric (strain) ◎ ◎ 12

  13. Telecentric (strain) Stencil guide base ◎ box ◎ 13

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

  15. Telecentric (deflection) ◎ ◎ Compared to laser measurement: +/- 3mm mm 15

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

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

  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 ◎ They are practicable for bridge monitoring applications ◎ 18

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

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

  21. Procedure ① ② ④ ③ 21

  22. Scanned image examples Horizontal Vertical 45°diagonal To have a better sharpness effect, Grey spray was used Resolution: 1200dpi 22

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