Apparatus and method for inspecting technical devices using a borescope

Patent metadata

Field	Value
Publication number	US-12247929-B2
Application number	US-202117910356-A
Country	US
Kind code	B2
Filing date	Mar 9, 2021
Priority date	Mar 10, 2020
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

An apparatus is used for inspecting a technical device using a borescope. The apparatus has a repeatedly plastically deformable and elongated carrier which is guidable in a deforming unit. The deforming unit has a stationary guide configured to axially guide the carrier at an outlet end and an actuator which is designed to axially guide the carrier and can be moved in at least one direction perpendicular to the gap between the guide and the actuator in order selectively to apply a bending moment to the carrier guided by the guide and the actuator. A borescope head is arranged at that end of the carrier which protrudes from the outlet end of the deforming unit.

First claim

The invention claimed is:

1. An apparatus for inspecting a technical device using a borescope, the apparatus comprising:
a repeatedly plastically deformable and elongated carrier which is guidable in a deforming unit, wherein the deforming unit comprises:
a stationary guide configured to axially guide the carrier at an outlet end; and
an actuator which is configured to axially guide the carrier, and is configured to move in at least one direction perpendicular to the gap between the guide and the actuator in order selectively to apply a bending moment to the carrier guided by the guide and the actuator, and

wherein a borescope head is arranged at that end of the carrier which protrudes from the outlet end of the deforming unit.

2. The apparatus as claimed in claim 1 , wherein the actuator is designed to selectively apply a twisting moment to the carrier.

3. The apparatus as claimed in claim 1 , wherein the actuator and/or the stationary guide comprises a controllable lock for selectively fixing the position and/or the angular situation of the carrier in the actuator and/or the guide, wherein the lock is configured as a two-finger gripper.

4. The apparatus as claimed in claim 1 , wherein the actuator is moveable in the direction of the gap between the stationary guide and the actuator.

5. The apparatus as claimed in claim 1 , wherein the guide and/or the actuator comprise guide rollers for the carrier.

6. The apparatus as claimed in claim 1 , wherein a guide tube, protruding from the deforming unit, for the passage of the carrier is fastened.

7. The apparatus as claimed in claim 1 , comprising a feed mechanism by which the carrier is configured to be fed in a defined manner to the actuator on a side remote from the guide, wherein the feed mechanism is fixed relative to the guide or moved together with the actuator.

8. The apparatus as claimed in claim 1 , wherein the carrier comprises a probe in a region of the borescope head for determining a position and/or orienting the borescope head.

9. The apparatus as claimed in claim 1 , further comprising a controller configured to control components of the deforming unit, taking into account positional and/or orientation information of the borescope head obtained via a probe or by the borescope head.

10. The apparatus as claimed in claim 1 , wherein the borescope head is rigidly connected to the carrier or is part of a flexible borescope which is guidable through a channel in the carrier.

11. The apparatus as claimed in claim 1 , wherein the actuator comprises a six-axis jointed-arm robot and/or a hexapod robot, wherein the position and/or situation of the axial guidance of the actuator is modifiable by the robot.

12. The apparatus as claimed in claim 1 , wherein the carrier is a material composite tube, comprising a core consisting of an aluminum strip and/or wound lengthwise, with a plastic covering and/or a protective coating on the inside.

13. The apparatus as claimed in claim 1 , wherein the borescope head comprises an image capture unit as part of a video borescope and/or the technical device is a gas turbine or an aircraft engine.

14. The apparatus as claimed in claim 1 , wherein the actuator comprises:
a robot, which is a six-axis jointed-arm robot and/or a hexapod robot, wherein the position and/or situation of the axial guidance of the actuator is modifiable by the robot,
a two-finger gripper configured as a controllable lock that is controllable to selectively fix a position or an angular situation of the carrier in the actuator, the two-finger gripper being at a distal end of the robot,

wherein the robot is configured to move a portion of the carrier relative to the stationary guide such that a bending or twisting moment is applied to the carrier in a region between the stationary guide element and the two-finger gripper.

15. A method for inspecting a technical device using a borescope, the method comprising selectively pre-deforming a repeatedly plastically deformable and elongated carrier with a borescope head, during insertion into the technical device, at its end which is to be inserted into the technical device in the region before entry into the technical device, in order thus to follow a predetermined path of the borescope head inside the technical device.

16. The method as claimed in claim 15 , wherein the pre-deformation comprises bending and twisting deformation.

17. The method of claim 15 , wherein the repeatedly plastically deformable and elongated carrier is guided in a deforming unit, wherein the deforming unit comprises:
a stationary guide configured to axially guide the carrier at an outlet end; and
an actuator, which is configured to axially guide the carrier, and configured to move in at least one direction perpendicular to the gap between the guide and the actuator in order to apply selectively a bending moment to the carrier guided by the guide and the actuator, and
wherein the borescope head is arranged at that end of the carrier which protrudes from the outlet end of the deforming unit.

Assignees

• Lufthansa Technik Ag

Inventors

• Peters Jan Oke
• Thies Michael
• Schueppstuhl Thorsten
• Bath Lukas

Classifications

• G01N2021/9542

  using a probe · CPC title

• G01N35/0099

  comprising robots or similar manipulators (robots per se B25J) · CPC title

• B25J17/0283

  Three-dimensional joints · CPC title

• B25J9/1697

  Vision controlled systems · CPC title

• H04N23/555

  for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes · CPC title