Dual-band infrared imaging for concrete bridge deck inspection
Dual-band infrared (DBIR) imaging methods and unique image-correction algorithms used successfully for underground and obscured object imaging and detection (of buried mines, archaeological structures, geothermal aquifers and airframe defects) are adapted for inspection of concrete highways and bridge decks to provide early warnings of subsurface defects. To this end, we prepared small concrete test slabs with defects (embedded plastic layers). We used selective DBIR (3--5 {mu}m and 8--12 {mu}m) image ratios to depict the defect sites and remove the effects of surface clutter. We distinguish true temperature-difference signals (at surrogate delamination sites) from emissivity noise (at sites with oil stains, sand, gravel, metal parts and roughness differences) towards improved concrete bridge deck inspections.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10126142
- Report Number(s):
- UCRL-JC-115704; CONF-940241-2; ON: DE94007126
- Resource Relation:
- Conference: Structural materials technology - non-destructive technology conference,Atlantic City, NJ (United States),23-25 Feb 1994; Other Information: PBD: Feb 1994
- Country of Publication:
- United States
- Language:
- English
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