NDLI: Processing and probability analysis of pulsed terahertz nde of corrosion under shuttle tile data

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Processing and probability analysis of pulsed terahertz nde of corrosion under shuttle tile data

Content Provider	NASA Technical Reports Server (NTRS)
Author	Seebo, Jeffrey P. Anastasi, Robert F. Madaras, Eric I. Ely, Thomas M.
Copyright Year	2009
Description	This paper examines data processing and probability analysis of pulsed terahertz NDE scans of corrosion defects under a Shuttle tile. Pulsed terahertz data collected from an aluminum plate with fabricated corrosion defects and covered with a Shuttle tile is presented. The corrosion defects imaged were fabricated by electrochemically etching areas of various diameter and depth in the plate. In this work, the aluminum plate echo signal is located in the terahertz time-of-flight data and a threshold is applied to produce a binary image of sample features. Feature location and area are examined and identified as corrosion through comparison with the known defect layout. The results are tabulated with hit, miss, or false call information for a probability of detection analysis that is used to identify an optimal processing threshold.
File Size	382559
Page Count	9
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20090012431
Archival Resource Key	ark:/13960/t6p03548h
Language	English
Publisher Date	2009-03-08
Access Restriction	Open
Subject Keyword	Nondestructive Tests Image Processing Space Shuttles Probability Theory Inspection Structural Reliability Data Processing Structural Health Monitoring Defects Degradation Fault Detection Tiles Corrosion Pulsed Radiation Plates Structural Members Spacecraft Reliability Quality Control Spacecraft Structures Aerospace Safety Damage Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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