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System and method for detecting pin-holes in fiberglass and composite parts

A technology for photodetectors, workpieces, applied in the field of pinholes and other surface deformation systems, can solve the problem of multi-chemical waste, expensive, time-consuming, etc.

Active Publication Date: 2016-02-10
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The additional step of covering and sanding each part is costly, time consuming and generates a lot of chemical waste, whether or not pinholes are present in the part

Method used

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  • System and method for detecting pin-holes in fiberglass and composite parts
  • System and method for detecting pin-holes in fiberglass and composite parts
  • System and method for detecting pin-holes in fiberglass and composite parts

Examples

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Embodiment Construction

[0022] Throughout the present disclosure, like reference numerals refer to like elements throughout the drawings, which illustrate various example embodiments of the present disclosure.

[0023] now refer to figure 1 , the component under test 100 may include a housing portion 102 and a core portion 101 . For example, component 100 may be an exterior panel. The inner core portion 101 may provide structural support and the shell portion 102 (which is the outer layer) may provide protection of the inner core portion from external environmental influences such as moisture. Housing portion 102 may be constructed of fiberglass or composite materials, which, as noted above, may develop pinholes or other surface defects during high temperature curing. exist figure 1 In , three pinholes 103 are shown within housing portion 102 (but not to scale). It is evident that pinholes 103a, 103b, 103c can compromise structural integrity (at least relative to air holes), even though such pinh...

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PUM

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Abstract

The invention relates to a system and method for detecting pin-holes in fiberglass and composite parts. A system (200, 300) and method (400) is disclosed for detecting defects in the surface of a workpiece such as a fiberglass or composite part (100). A light source (201, 305) is positioned to direct light at the workpiece (100) at an oblique angle (401) with respect to the surface of the workpiece (100). At least one camera (205, 303, 304) is positioned to detect light (203) reflected from the workpiece (100) and to generate a light signal corresponding to the reflected light (203). A polarizing lens (204) is positioned between each of the at least one cameras (205, 303, 304) and the workpiece (100). A processor (206) is coupled to each of the at least one cameras (205, 303, 304) to receive the corresponding light signals. The processor (206) is programmed to process the light signals to detect any defects in the surface of the workpiece (100) based on relative magnitudes of the received light signal. A video display (207) and a printer (209, 306) are preferably coupled to the processor (206) to show any detected defects.

Description

technical field [0001] The present invention generally relates to systems and methods for detecting pinholes and other surface deformations in fiberglass and composite components. Background technique [0002] Fiberglass and composite parts can develop pinhole surface defects during manufacturing. Such pinhole defects typically occur after the part has been cured at high temperature, eg, in an autoclave. Pinhole defects can be as small as 0.001 inches in diameter and are therefore extremely difficult to detect with the naked eye. There are currently no known non-destructive testing techniques available for detecting pinholes on bare (unclad) fiberglass and composite parts. After a part whose surface has pinholes has been painted, pinhole defects become easier to detect, and clad parts with pinhole defects are likely to be rejected by customers. However, repairing pinhole defects on parts after painting can be expensive and time-consuming. Many fiberglass and composite pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88
CPCG01N21/894G01N21/8422G01N21/8806G01N2021/845G01N2021/888G01N2021/8848G01N2021/8861G01N21/8851G01N21/21
Inventor M·萨法伊R·G·特纳
Owner THE BOEING CO