&lt;title&gt;NDT on wide-scale aircraft structures with digital speckle shearography&lt;/title&gt;

Kalms, Michael; Jueptner, Werner P. O.; Bisle, Wolfgang; Scherling, Dieter; Tober, Gustav

doi:10.1117/12.364280

Cited by 9 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Of course, the laser can be divided into more than two parts. 17 Recent investigations show the possibility of using broadband light sources such as a mercury lamp for digital speckle shearography. 18 …”

Section: Influence Of Illuminationmentioning

confidence: 99%

“…• the flattening of the intensity profile by beam shaping using, e.g., a gradient index lens system, 15 • the illumination of the whole surface by several mutual incoherent laser sources, 16 • the division of one powerful laser source into several mutual incoherent laser beams. 17 The second and third method are based on the same principle: the self-reference in shearography. Our following explanations refer to Fig.…”

Section: Influence Of Illuminationmentioning

confidence: 99%

See 1 more Smart Citation

Mobile shearography system for the inspection of aircraft and automotive components

Kalms

Osten

2003

Opt. Eng

Self Cite

View full text Add to dashboard Cite

Shearography is an approved and powerful tool for the nondestructive investigation of technical components with respect to material faults and structural imperfections. An application field of high interest is the inspection of aircraft and automotive components. Both material and structural imperfections can be recognized as typical fringe patterns in the shearogram. However, a reliable fault detection requires a detectable fault response to the applied load at the surface and a sufficient quality of the fringe pattern as well. Therefore, the testing of large-scale technical objects having in general noncooperative surfaces needs a careful design of the following system components: the shearography sensor, the illumination unit, the loading system, and the evaluation software. We report a mobile shearography system that was especially designed for the inspection of aircraft and automotive parts under industrial boundary conditions. Several examples illustrate the efficiency of the system.

show abstract

Section: Influence Of Illuminationmentioning

confidence: 99%

Section: Influence Of Illuminationmentioning

confidence: 99%

Mobile shearography system for the inspection of aircraft and automotive components

Kalms

Osten

2003

Opt. Eng

Self Cite

View full text Add to dashboard Cite

show abstract

“…Preparatory terrestrial checks of a DSPI system as a probable candidate for space flight investigations were performed recently. 38 Shearography and its derivation digital speckle shearography [18][19][20][21][22][23][24] permits to perform measurements of displacement gradients. It employs an image shearing optical element which produces a pair of laterally sheared images in the image plane.…”

Section: Digital Speckle Pattern Interferometry and Digital Speckle Smentioning

confidence: 99%

Holgraphic research outside the Earth in the 21st century: trends and prospects

Petrov¹

2002

SPIE Proceedings

View full text Add to dashboard Cite

Review of current and emerging methods of holography and speckle metrology is given. The prospects of advanced holographic research in microgravity conditions in the 21st century are analysed. Novel holographic rapid access system (RAS) is presented. It is very simple, compact, portable and user-friendly. Holographic RAS is elegantly devised and requires minimal hardware. The unique feature of holographic RAS enable the possibility to work in real time in situ. For the first time it is possible to obtain holograms, holographic interferogams and specklegrams outdoors in any brightly lit environment, including sunlit environments. The innovative holographic RAS suits ideally for monitoring of various physical processes, studying of vibrations and static deformations, testing of microelectronics and MEMS in microgravity aboard the International Space Station. The hardware is so simple that it can be operated by an astronaut having practically no skill in optics. Ultra high resolution silver halide media are used in this RAS. The unique features of holographic RAS enable the possibility to avoid any liquid baths for photoprocessing of the medium and to work in real time in situ. One of the early variants of holographic RAS invented by this author was used to obtain the first ever holograms and holographic interferograms of different physical phenomena aboard navigating spacecraft.Key words: holographic research in space missions; research aboard the International Space Station; innovative spacecraft-based research technologies; holographic rapid access system (RAS); real time holography and holographic interferometry in microgravity; in situ bathless holography; advanced holography in brightly lit environments.

show abstract

“…The following examples should visualize some results of our work by testing airplanes or airplane components. The shearographic investigations were made in cooperation with Airbus Germany (NDT-Group Bremen) and EADS Military Aircrafts (Germany, Manching) [4][5][6]. The inspected material was in all here represented results CFRP.…”

Section: Testing Of Technical Objectsmentioning

confidence: 99%

A Mobile Shearography System for Non-Destructive Testing of Industrial and Artwork Components

Kalms¹,

Jueptner²

2005

KEM

View full text Add to dashboard Cite

By reason of their sensitivity, accuracy and non-contact as well as non-destructive characteristics, modern optical methods such as digital speckle shearography have found an increasing interest for NDT applications on factory floors. With new carbon fiber technologies and other lightweight constructions in aircraft and automotive manufacturing, adapted examination designs and especially developed testing methods are necessary. Shearography as a coherent optical method has been widely accepted as a useful NDT tool. It is a robust interferometric method to determine locations with maximum stress on various material structures. However, limitations of this technique can be found in the bulky equipment components, the interpretation of complex shearographic result images and at the work with non-cooperative surfaces such as dark absorber and bright shining reflectors. We report a mobile shearography system that was especially designed for investigations at aircraft and automotive construction sites. It is also useful to find out the current conditions of artworks.

show abstract

<title>NDT on wide-scale aircraft structures with digital speckle shearography</title>

Cited by 9 publications

References 0 publications

Mobile shearography system for the inspection of aircraft and automotive components

Mobile shearography system for the inspection of aircraft and automotive components

Holgraphic research outside the Earth in the 21st century: trends and prospects

A Mobile Shearography System for Non-Destructive Testing of Industrial and Artwork Components

Contact Info

Product

Resources

About