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Real Time X-Ray Microfocus Inspection of Honeycomb

  • E. M. Siwek
  • J. N. Gray
Chapter
Part of the Review of Progress in Quantitative Nondestructive Evaluation book series

Abstract

Honeycomb structures are often used because they are light in weight, yet able to bear large pressure loads. Because weight is such a major consideration in the aerospace industry, honeycomb is used in many non-load bearing structures such as control surfaces, access doors, floors, and speed brakes. As may be expected in a complicated structure, there are many possibilities for defects or damage to be induced into these parts, both during the fabrication process and while the part is in service. The presence of these defects necessitate that honeycomb structures be inspected. Film radiography is often used as the primary inspection technique for honeycomb. Alternatively, real time imaging is a filmless radiographic inspection technique which has speed and arbitrary orientation of the sample as its primary advantage. This technique has not been widely used, primarily because of poor image quality. The first point is poor spatial resolution, and the second is poor contrast sensitivity, as compared to film. When a microfocus x-ray source is used in conjunction with a real time system, the result is a marked improvement of the image resolution. The use of image processing can significantly improve the contrast sensitivity. The result is a real time system with resolution equivalent to the present film inspection techniques thus allowing for quicker and less costly inspections, so long a the sensitivity requirements are not too stringent.

Keywords

Real Time System Contrast Sensitivity Real Time Image Image Intensifier Face Sheet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • E. M. Siwek
    • 1
  • J. N. Gray
    • 1
  1. 1.Center for Nondestructive EvaluationIowa State UniversityAmesUSA

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