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Non-destructive inspection using laser- ultrasound and infrared thermography

A thermal imaging and inspection technology, which is applied to the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, and optical testing for flaws/defects. question

Inactive Publication Date: 2014-06-18
LOCKHEED MARTIN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another NDE method is transient infrared (IR) thermography, which does not effectively allow for inspection of polymer-matrix composites due to its insensitivity to defects deeper than a few millimeters in polymer-matrix parts

Method used

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  • Non-destructive inspection using laser- ultrasound and infrared thermography
  • Non-destructive inspection using laser- ultrasound and infrared thermography
  • Non-destructive inspection using laser- ultrasound and infrared thermography

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Embodiment Construction

[0019] Preferred embodiments of the present invention are shown in the drawings, and like numerals are used to refer to like and corresponding parts of the various drawings.

[0020] Embodiments of the present invention combine laser ultrasound and thermal imaging techniques to provide a more complete non-destructive inspection of target materials such as, but not limited to, polymeric matrix components (ie, composite materials). One embodiment provides an inspection system operable to inspect the internal structure of a target material. The inspection system includes a laser generator, an ultrasonic inspection system, a thermal imaging system, and a processor / control module. A generating laser generates a pulsed laser beam operable to induce ultrasonic displacement and thermal transients in a target material. Ultrasonic inspection systems detect ultrasonic surface displacements in target materials. Thermal imaging systems detect thermal transients in target materials. A pr...

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Abstract

An inspection system (200) is provided to examine internal structures of a target material (216). This inspection system includes a generation laser (210), an ultrasonic detection system (220, 226, 228, 230), a thermal imaging system (234), and a processor / control module (232). The generation laser (210) produces a pulsed laser beam (212) that is operable to induce ultrasonic displacements and thermal transients at the target material (216). The ultrasonic detection system detects ultrasonic surface displacements at the target material (216). The thermal imaging system (234) detects thermal transients at the target material (216). The processor (232) analyzes both detected ultrasonic displacements and thermal imagery of the target material (216) to yield information about the target material's internal structure. The target material (216) preferably comprises composite material.

Description

technical field [0001] The present invention relates to non-destructive testing, and more particularly to the use of thermal imaging and ultrasonic testing to inspect the internal structure of materials. Background technique [0002] The use of advanced composite structures in aerospace, automotive and many other businesses has grown tremendously in recent years. While composites offer significant improvements in performance, they require stringent quality control processes during the manufacturing process and after the materials are used in finished products. Specifically, non-destructive evaluation (NDE) methods must assess the structural integrity of composite materials. Proper assessment requires the ability to detect inclusions, delamination and porosity in near-surface regions and deep interior regions. [0003] Various methods and devices have been proposed for assessing the structural integrity of composite structures. One solution uses an ultrasonic source to gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/17G01N21/88G01N25/72G01N29/24
CPCG01N21/1702G01N2021/8472G01N21/718G01N2201/0697G01N2021/1706G01N21/8851G01N25/72G01N29/2418G01N21/1717G01N29/228G01N2291/0231G01N21/17G01N21/88G01N29/04
Inventor P·W·洛兰D·R·霍沃H·I·林格马赫M·杜波瓦斯P·W·德拉克
Owner LOCKHEED MARTIN CORP