EP4118480A1 - Appareil d'inspection au moyen d'endoscopes de dispositifs techniques - Google Patents

Appareil d'inspection au moyen d'endoscopes de dispositifs techniques

Info

Publication number
EP4118480A1
EP4118480A1 EP21710910.7A EP21710910A EP4118480A1 EP 4118480 A1 EP4118480 A1 EP 4118480A1 EP 21710910 A EP21710910 A EP 21710910A EP 4118480 A1 EP4118480 A1 EP 4118480A1
Authority
EP
European Patent Office
Prior art keywords
carrier element
borescope
guide tube
deformation
guided
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21710910.7A
Other languages
German (de)
English (en)
Inventor
Thorsten SCHÜPPSTUHL
Lukas BATH
Maik Dammann
Mattes Schumann
Tarek Mostafa
Oliver Neumann
Werner Neddermeyer
Sven Rasche
Tomas Domaschke
Sönke Bahr
Jan Oke Peters
Michael Thies
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lufthansa Technik AG
Original Assignee
Lufthansa Technik AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lufthansa Technik AG filed Critical Lufthansa Technik AG
Publication of EP4118480A1 publication Critical patent/EP4118480A1/fr
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/954—Inspecting the inner surface of hollow bodies, e.g. bores
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2476—Non-optical details, e.g. housings, mountings, supports
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00147—Holding or positioning arrangements
    • A61B1/00154—Holding or positioning arrangements using guiding arrangements for insertion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005—Flexible endoscopes
    • A61B1/0051—Flexible endoscopes with controlled bending of insertion part
    • A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/954—Inspecting the inner surface of hollow bodies, e.g. bores
    • G01N2021/9542—Inspecting the inner surface of hollow bodies, e.g. bores using a probe

Definitions

  • the invention relates to a device for borescope examination of technical devices, in particular aircraft engines and their components such as their combustion chambers, and an arrangement comprising such a device.
  • Boroscopy is used, for example, for the inspection of aircraft engines, in order to gain an insight into the interior of the engine without having to take it apart in a laborious manner. At least for individual areas of the aircraft engine, such as the combustion chamber, for example, it is necessary or at least desirable to find and document the area in full.
  • a video borescope with a flexible shaft is used for boroscopy of the interior of the combustion chamber, which is manually guided through the combustion chamber.
  • the flexible borescope is guided along the entire inner circumference of the combustion chamber and then slowly pulled out.
  • the images captured by the borescope are recorded while it is being pulled out. An attempt is made to ensure that the complete circumference of the usually ring-shaped Combustion chamber is detected. If a possible problem point is identified in the combustion chamber, a manual 3-D recording of the corresponding point can then be carried out with specially designed 3-D borescopes.
  • the object of the present invention is to create a device for boroscope examination with which the inspection of technical devices, such as aircraft engines, can be simplified and improved.
  • the invention relates to a device for boroscopic examination of a technical device comprising a guide tube that can be inserted through a boroscopy opening on a technical device to be boroscoped and a repeatedly plas table deformable support element for guiding a borescope head arranged at one end of the support element, the guide tube for deforming the Support element is formed when performing the support element through the guide tube.
  • the invention relates to an arrangement comprising a device according to the invention and a flexible borescope, wherein the carrier element of the device is tubular and the borescope is inserted into the carrier element.
  • the "borescope head” is that part of a borescope that ultimately determines the recording area of the borescope. In a purely optical borescope, this corresponds, for example, to the borescope lens or the entry surface of a light guide which defines the final recording cone In a video borescope, this is the recording area of the image recording sensors provided for this purpose
  • the Boroksop head can be arranged on a rigid or flexible shaft, but it is also possible to arrange the Boroksop head without its own structural shaft on another element, such as, for example, the carrier element.
  • the device according to the invention enables a borescope head to be guided inside a technical device without component contact along a reproducible path, for example a circular path.
  • the invention has recognized that due to the geometry of some technical devices, such as aircraft engines, and the paths required for the borescope inspection, a completely pre-formed guide device that can be inserted into the technical device is not possible.
  • the invention therefore proposes to use a plastically deformable support element, the final shape of which is determined when inserted into a technical device by a guide tube arranged on the technical device.
  • the guide tube is therefore used for plastic deformation of the carrier gerelements formed when guiding the carrier element through the guide tube.
  • the guide tube also specifies from where the carrier element actually protrudes freely into the technical device.
  • a predetermined path of the carrier element inside the technical device can be reproducibly achieved through a suitable design and arrangement of the guide tube and, if necessary, suitable pre-deformation of the carrier element (e.g. bending or torsional deformation).
  • a borescope head guided through the carrier element can then also be guided along this path without direct contact with the technical device.
  • the path can be selected in such a way that the boroscope is guided past the surfaces to be examined inside the technical device at a suitable distance.
  • the device according to the invention thus not only enables reproducible boroscopy, but can often also improve the quality of the data obtained by the boroscopy.
  • These data can be image data or, for example, 3-D surface data obtained by triangulation.
  • the carrier element is repeatedly plastically deformable, this deformability having to be such that an actual deformation is possible or actually takes place when the carrier element is passed through the guide tube.
  • "Repeatedly plastically deformable” denotes the property that the carrier element shows little or no signs of fatigue during deformation and the carrier element essentially retains the shape achieved by deformation, in particular any elastic part of the deformation is less than that Percentage of the plastic deformation of the carrier element Deformations to be expected can be deformed without noticeable signs of fatigue.
  • the designation as a carrier element also makes it clear that the shape of the carrier element achieved after deformation is essentially retained, even with the borescope head arranged thereon, so that the carrier element is thus self-supporting.
  • some types of tubes are known which are basically suitable as a support element of the device according to the invention. It is particularly advantageous and therefore preferred if the carrier element is a composite tube.
  • the carrier element can comprise a core made of wound metal strip, the metal strip preferably being an aluminum strip and / or wound lengthways.
  • the core is preferably sheathed from plastic, preferably polyethylene.
  • a protective coating preferably a protective film
  • a protective film can be provided on the side of the core opposite the cladding, so that in this case the core is completely surrounded by the cladding and protective covering.
  • a smooth surface of the carrier element on its outer and inner side can be achieved regularly.
  • Suitable pipes are available at the priority date, for example, under the trade name "Dekabon” or under the brand “Synflex” from Eaton Corporation, USA, and are described in more detail, for example, in US Pat. No. 4,216,802.
  • the borescope head can be arranged directly on the carrier element, the leads to the borescope head - be it cables or light guides - can be passed through or along the carrier element. But it is also possible that the boroscopic head is arranged on a flexible boroscope shaft which is guided through the carrier element, which is then for example tubular in shape.
  • the guide tube of the device can be designed for direct attachment to the technical device in a clear and thus reproducibly restorable position, for example by attaching the guide tube to the borescope opening itself or to the surrounding fastening points on the technical device.
  • a guide tube fastening is provided, which can also be fastened in a definite position on the technical device, but which allows the position of the guide tube relative to the guide tube fastening to be changed in a planned and preferably controllable manner. It is then possible after the attachment of the guide tube attachment to the technical device by changing the position of the guide tube appropriately to guide the carrier element one after the other along different paths inside the technical technical device. The different tracks are still completely reproducible.
  • Boroscope openings can be openings provided for this purpose, but - for example in the case of an aircraft engine - also spark plug, fuel nozzle or maintenance openings.
  • the device can preferably comprise a pre-deformation unit for pre-deforming the carrier element before the carrier element is guided through the guide tube.
  • a pre-deformation unit for pre-deforming the carrier element before the carrier element is guided through the guide tube.
  • the device has a drive unit for the carrier element and / or a flexible borescope guided through the carrier element.
  • the drive unit can be designed for the propulsion of the carrier element and / or a boroscope guided therein. It is preferred if the drive unit is designed in addition to the rotation of the carrier element and / or a boroscope guided therein.
  • the guide tube can be adaptively adaptable, d. H. its shape is fundamentally changeable.
  • the adaptive adaptation can take place mechanically, thermomechanically and / or electromechanically.
  • a probe unit for determining the position and / or the orientation of the insertion end of the carrier element can be provided.
  • a corresponding probe unit can be used to check whether the carrier element is following a given path.
  • the probe unit can be designed to determine the position using any known measuring principle, for example time-of-flight analysis from radio or light signals sent and / or received by the probe unit. It is also possible to determine the position on the basis of image evaluation, for which purpose the probe unit comprises suitable image acquisition sensors.
  • the probe unit can also be integrated into the borescope head.
  • the device preferably comprises a control device for controlling the guide tube fastening, the pre-deformation unit, the adaptive adjustment of the guide tube and / or that of the drive unit.
  • control takes place taking into account the position and / or orientation information of the borescope head obtained via a probe unit or through the carrier element.
  • the corresponding position and / or orientation information which can be determined either by a probe unit or - depending on the design of the boroscope guided by the device - also via the guided boroscope, can be used to compare the actual position and / or orientation take place along the specified path and, if a deviation is determined, a suitable countermeasure is initiated.
  • the arrangement according to the invention also includes a borescope which is inserted into the carrier element of the device. Reference is made to the above explanations for an explanation of the arrangement.
  • the borescope head can be a video borescope head in which an electronic image acquisition unit is provided for generating image and / or video data. It can also be designed to acquire 3-D surface data, for example by means of triangulation on the basis of image data from two image acquisition units arranged adjacent to one another.
  • FIG. 1 a schematic representation of a device according to the invention when used on a combustion chamber of an aircraft engine
  • FIG. 2 a schematic sectional view of FIG. 1.
  • FIGs 1 and 2 the use of a device 1 according to the invention for inspecting the combustion chamber 21 of an aircraft engine as a technical device 20 is outlined. For the sake of clarity, only the combustion chamber 21 of the aircraft engine 20 is shown. The device according to the invention can, however, be used in particular when the combustion chamber 21 is installed in an aircraft engine 20.
  • the device comprises a guide tube 2, which is fastened to the aircraft engine 20 via a guide tube fastening 4 and protrudes through a borescope opening 22 into the combustion chamber 21.
  • the guide tube fastening 4 can be controlled by the control device 8 in such a way that the position of the guide tube 2 with respect to the borescope opening 22 can be systematically changed.
  • the carrier element 3 is a composite material tube comprising a core made of longitudinally wound aluminum tape, an outer sheath made of polyethylene, and a protective film as a protective coating on the inside.
  • the carrier element 3 is self-supporting or also supports the borescope or borescope head, so that it follows the path 10 inside the combustion chamber 21 after being passed through the guide tube 2, in which a deformation takes place.
  • a flexible borescope (not shown) for the actual borescope to be guided through the tubular carrier element 3.
  • a borescope head 7 is arranged at the end 3 'of the carrier element 3 inserted into the combustion chamber 21, the images generated by image sensors being transmitted to a control device 8 via data lines passed through the carrier element 3 and distributed from there can.
  • a pre-deformation unit 5 is provided with which the carrier element 3 is deformed before being passed through the guide tube 2, in particular with regard to torsion is in order to compensate for any twisting deformations that may occur due to the design of the carrier element 3 during the deformation in the guide tube 2.
  • a drive unit 6 is designed integrally with the pre-deformation unit 5, with which the propulsion, that is to say the ultimate passage of the carrier element 3 through the guide tube 2, is achieved.
  • the pre-deformation unit 5 and the drive unit 6 are also controlled by the control unit 8.
  • a probe unit with which the position and orientation of the insertion end 3 'of the carrier element 3 or the borescope head 7 can be determined.
  • This information is made available to the control unit 8, which checks compliance with the web 10 and, if necessary, by appropriate control of the guide tube fastening 4, the pre-deformation unit 5 and / or the drive unit 6 can act on the carrier element 2 in such a way that the position and orientation determined by the probe unit correspond to the desired position along the path 10.
  • the probe unit can use any known method to determine its position and orientation. However, it is also possible for the probe unit to use the image acquisition sensors of the borescope head. By suitable analysis of the image and / or 3-D data obtained from the borescope head 7, the position and orientation of the borescope head 7 or the insertion end 3 'of the carrier element 3 can be determined and taken into account by the control device 8, as described will.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Radiology & Medical Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Biophysics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Astronomy & Astrophysics (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Abstract

L'invention concerne un appareil (1) permettant l'inspection au moyen d'endoscopes d'un dispositif technique (20), en particulier de moteurs d'aéronef et de composants de ceux-ci tels que des chambres de combustion (21) ; l'invention concerne également un agencement comprenant un tel appareil. L'appareil (1) comprend un tube de guidage (2), qui peut être introduit à travers une ouverture d'endoscopie (22) dans un dispositif technique (20) devant être endoscopé, et un élément porteur à déformation plastique répétée (3) pour guider une tête d'endoscope (7) disposée à une extrémité de l'élément porteur (3), le tube de guidage (2) étant conçu pour déformer l'élément porteur (3) lorsque l'élément porteur (3) est guidé à travers le tube de guidage (2). L'agencement comprend un tel appareil (1) et un endoscope flexible, l'élément porteur (3) de l'appareil (1) étant tubulaire et l'endoscope étant introduit dans l'élément porteur (3) de l'appareil (1).
EP21710910.7A 2020-03-10 2021-03-05 Appareil d'inspection au moyen d'endoscopes de dispositifs techniques Pending EP4118480A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020106508.6A DE102020106508A1 (de) 2020-03-10 2020-03-10 Vorrichtung für die Boroskopinspektion von technischen Geräten
PCT/EP2021/055564 WO2021180582A1 (fr) 2020-03-10 2021-03-05 Appareil d'inspection au moyen d'endoscopes de dispositifs techniques

Publications (1)

Publication Number Publication Date
EP4118480A1 true EP4118480A1 (fr) 2023-01-18

Family

ID=74867516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21710910.7A Pending EP4118480A1 (fr) 2020-03-10 2021-03-05 Appareil d'inspection au moyen d'endoscopes de dispositifs techniques

Country Status (5)

Country Link
US (1) US20230120378A1 (fr)
EP (1) EP4118480A1 (fr)
CN (1) CN115516363A (fr)
DE (1) DE102020106508A1 (fr)
WO (1) WO2021180582A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11707819B2 (en) 2018-10-15 2023-07-25 General Electric Company Selectively flexible extension tool
US11702955B2 (en) 2019-01-14 2023-07-18 General Electric Company Component repair system and method
US11692650B2 (en) 2020-01-23 2023-07-04 General Electric Company Selectively flexible extension tool
US11752622B2 (en) 2020-01-23 2023-09-12 General Electric Company Extension tool having a plurality of links
US11371437B2 (en) 2020-03-10 2022-06-28 Oliver Crispin Robotics Limited Insertion tool
US12091981B2 (en) 2020-06-11 2024-09-17 General Electric Company Insertion tool and method
US11654547B2 (en) 2021-03-31 2023-05-23 General Electric Company Extension tool

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3690775A (en) 1971-09-01 1972-09-12 Avco Corp Borescope fixture
US3778170A (en) 1972-11-02 1973-12-11 Gen Electric Borescope guide tube
US4216802A (en) 1978-10-18 1980-08-12 Eaton Corporation Composite tubing product
US4790624A (en) * 1986-10-31 1988-12-13 Identechs Corporation Method and apparatus for spatially orienting movable members using shape memory effect alloy actuator
US5417546A (en) 1993-08-06 1995-05-23 Schott Fiber Optics Elbow guide tube assembly
JP4096325B2 (ja) * 1998-12-14 2008-06-04 正喜 江刺 能動細管及びその製造方法
US20050162643A1 (en) 2004-01-22 2005-07-28 Thomas Karpen Automotive fuel tank inspection device
US20100069716A1 (en) * 2008-09-12 2010-03-18 Yem Chin Flexible guide conduit
WO2014150055A1 (fr) * 2013-03-15 2014-09-25 Jalilian Mohammad Appareil à endoscope et procédés d'utilisation de celui-ci
KR20170024051A (ko) * 2014-07-02 2017-03-06 제노코르, 인코포레이티드 보어스코프들 및 관련 방법들 및 시스템들
US20180228557A1 (en) 2015-04-20 2018-08-16 Medrobotics Corporation Articulating robotic probes, systems and methods incorporating the same, and methods for performing surgical procedures
DE102016110536A1 (de) 2015-07-20 2017-01-26 Siemens Energy, Inc. Optisches Inspektionsendoskop mit verformbarer, selbsttragender Bereitstellungsanbindung
EP3182103B1 (fr) * 2015-12-17 2020-11-04 Ansaldo Energia Switzerland AG Gaine de boroscope
DE102017218426B3 (de) * 2017-10-16 2019-01-17 Lufthansa Technik Ag Vorrichtung und Verfahren zur Boroskopinspektion von Strahltriebwerken
DE202019102209U1 (de) * 2019-04-17 2019-04-25 Schölly Fiberoptic GmbH Endoskopiesystem umfassend ein Endoskop mit einem flexiblen Schaft
DE102020106509B3 (de) * 2020-03-10 2021-06-24 Lufthansa Technik Aktiengesellschaft Vorrichtung und Verfahren für die Boroskopinspektion von technischen Geräten

Also Published As

Publication number Publication date
WO2021180582A1 (fr) 2021-09-16
CN115516363A (zh) 2022-12-23
DE102020106508A1 (de) 2021-09-16
US20230120378A1 (en) 2023-04-20

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