Development of a Scanning Laser System for Measuring Seal Coat Quality

Details

• Creators:
  Liu, Richard ; Sun, Wei ; Chen, Yuanhang ; Chopra, Pankaj ; Li, Jing ; Chen, Xuemin
• Corporate Creators:
  University of Houston. Department of Electrical and Computer Engineering
• Corporate Contributors:
  Texas Department of Transportation. Research and Technology Implementation Office ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Detectors
  • Imagery
  • Lasers
  • Measuring instruments
  • Prototypes
  • Scanners
  • Seal coats
• Publication/ Report Number:
  FHWA/TX-08/0-5310-1, Report 0-5310-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Texas. Department of Transportation
• Abstract:
  In this project, a 3-D laser scanning imaging system based on auto-synchronized scanning is developed for evaluation of seal coat quality. Compared to the classical triangulation technique, this approach does not sacrifice the system resolution for the large field of view. To achieve high-speed measurement, a PSD (Position Sensitive Detector) is used in the prototype system instead of a CCD (Charge Couple Device), which is usually used in the common imaging system. By using a galvanometer scanner, the system can scan up to100 lines per second. Compared to the previous mechanical scanning device, which gives two scan lines per second, the new system is more suitable for highway speed measurement. The system is tested both in the lab with different distances. The result shows the great potential of this system to be applied in pavement survey.
• Format:
  PDF
• Funding:
  0-5310
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/88904/dot_88904_DS1.pdf
• File Type:
  [PDF - 2.04 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:a33c6e0444ac7127994ca302bc4f2eb48e8b823ee0e524aac66ea6dca966f4f05e609e7593e116a17c73575fda3ca5e2b9b376e3e6d9bee52240c8b453798724