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Advanced Non-contact Profiler Improving the Quality of Pavement Profile Measurement

Advanced Non-contact Profiler Improving the Quality of Pavement Profile Measurement. Research Point. 1. Inertial Profiler is fast , but distorts roughness value. 2. Walking profiler is too slow , but can get undistorted profile. Walking Profiler: Max 4km/h (Normal : 2km/h).

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Advanced Non-contact Profiler Improving the Quality of Pavement Profile Measurement

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  1. AdvancedNon-contact ProfilerImproving the Quality of Pavement Profile Measurement

  2. Research Point 1. Inertial Profiler is fast, but distorts roughness value. 2. Walking profiler is too slow, but can get undistorted profile. Walking Profiler: Max 4km/h (Normal : 2km/h) Dipstick : Max 0.5 km/h Reference : Boeing Runway Roughness Criteria, 2006

  3. Idea : Creating panorama Images A D B Panorama image E C Partial Images

  4. Technology Partial Profile D A B E C A C E Total Profile 1 2 3 4 A B C D E 3 3 1 1 2 2 4 4 L B D

  5. Technology High Resolution Digital Camera Infra Red LaserLine Projector Captured Image Image Processing RUNWAY Profile (numerical data)

  6. Test Device Pseudo pavement Digital Camera Laser Line Projector

  7. Test Device Laser Power Controler Laser Line Projector PC Battery Digital Camera Encoder AC Invertor

  8. Device Specifications Digital Camera Resolution : 2048 by 1088 @ 280 frame/Sec Lens : 6.5 forcal Length Non Distortion Lens (With IR Band-Pass Filter) Laser Projector Didode Power : 10W Wavelength : 808nm Spread angle : 50° Line width : >1mm DMI (Distance Measurement Unit) Pulse : 2048/cycle Distance Resolution : 1mm

  9. Preliminary test Pedestrian Sidewalk About 10cm (4 inch) Profile data

  10. Preliminary test(airport)

  11. Preliminary test Grooving at Runway Captured Image overlap 50cm (20 inch)

  12. Panorama profiler Digital Camera Laser Projector DMI

  13. Panorama profiler Laser Projector 1m Image capture

  14. Test Test Site Walking Profiler Speed bump 294m Test Unit(Test speed : 40km/hr)

  15. Test Result Cross correlation : 83.4% (IRI filter) Panorama Profiler Walking Profiler

  16. Test Result Cross correlation : 60.1% (None filter) Panorama Profiler Walking Profiler Speed bump Speed bump

  17. Plan Revise • Image distortion • Profile extraction algorism(nonfiler) Improve • Repeatability(over 92%) Goal • Speed of operation : Minimum 40 km/h (25 mi/h) • Sampling rate (longitudinal interval) : 2mm (0.08 inch) • Resolution (Vertical) : ± 1mm (0.04 inch) • Correlation : Over 90% (Basis Walking Profiler)

  18. Thank you

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