Transparent coating removal through laser ablation

Patent metadata

Field	Value
Publication number	US-12194569-B2
Application number	US-202117398459-A
Country	US
Kind code	B2
Filing date	Aug 10, 2021
Priority date	Aug 10, 2021
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A system includes a robotic arm, a rotisserie control linkage, and a computer system. The robotic arm includes a touch probe and laser head. The rotisserie control linkage is configured to couple to a transport cart. The computer system is communicatively coupled to the robotic arm and the rotisserie control linkage and is configured to control the system to probe, using the touch probe of the robotic arm, a transparent outer layer of an aircraft canopy located on the transport cart in order to determine surface measurements of the aircraft canopy. The computer system also controls the system to ablate, using a plurality of predetermined parameters and the laser head of the robotic arm, an interface layer located between the transparent outer layer and the aircraft canopy, wherein movements of the robotic arm during the ablation are based on the surface measurements.

First claim

What is claimed is:

1. A system comprising:
a robotic arm comprising a laser head and a touch probe; and
a computer system communicatively coupled to the robotic arm, the computer system configured to control the system to:
rotate an aircraft canopy;
during rotation of the aircraft canopy, probe, using the touch probe, the aircraft canopy, wherein probing the aircraft canopy with the touch probe determines a plurality of surface measurements of the aircraft canopy relative to the position of the robotic arm;
create a three-dimensional model of the aircraft canopy using the plurality of surface measurements; and
during rotation of the aircraft canopy, ablate, using a plurality of predetermined parameters and the laser head of the robotic arm, an interface layer located between a transparent outer layer and the aircraft canopy, wherein a distance between the laser head and an outer surface of the transparent outer layer is controlled by the computer system using the plurality of surface measurements during the ablation of the interface layer.

2. The system of claim 1 , wherein the predetermined parameters comprise:
a laser fluence;
a speed;
a wavelength; and
a focal distance.

3. The system of claim 2 , wherein the wavelength is selected based on a material of the interface layer.

4. The system of claim 2 , wherein the focal distance is selected so that light from the laser head passes through the transparent outer layer and is focused on the interface layer.

5. The system of claim 1 , wherein the laser head comprises a near infrared (NIR) laser.

6. The system of claim 5 , wherein the laser is a Neodymium laser.

7. The system of claim 1 , further comprising an enclosure that houses the robotic arm, a rotisserie control linkage, and a transport cart, the enclosure comprising one or more laser safety windows.

8. A system comprising:
a robotic arm comprising a laser head and a touch probe;
a rotisserie control linkage configured to couple to a transport cart; and
a computer system communicatively coupled to the robotic arm and the rotisserie control linkage, the computer system configured to control the system to:
rotate an aircraft canopy on the transport cart using the rotisserie control linkage;
during the rotation of the aircraft canopy on the transport cart, probe, using the touch probe of the robotic arm, an aircraft canopy, wherein probing the aircraft canopy with the touch probe determines a plurality of surface measurements of the aircraft canopy relative to the position of the robotic arm;
create a three-dimensional model of the aircraft canopy using the plurality of surface measurements; and
during the rotation of the aircraft canopy on the transport cart, ablate, using a plurality of predetermined parameters and the laser head of the robotic arm, an interface layer located between a transparent outer layer and the aircraft canopy, wherein a distance between the laser head and an outer surface of the transparent outer layer is controlled by the computer system using the plurality of surface measurements during the ablation of the interface layer.

9. The system of claim 8 , wherein the predetermined parameters comprise:
a laser fluence;
a speed;
a wavelength; and
a focal distance.

10. The system of claim 9 , wherein the wavelength is selected based on a material of the interface layer.

11. The system of claim 9 , wherein the focal distance is selected so that light from the laser head passes through the transparent outer layer and is focused on the interface layer.

12. The system of claim 8 , wherein the laser head comprises a near infrared (NIR) laser.

13. The system of claim 12 , wherein the laser is a Neodymium laser.

14. The system of claim 8 , further comprising an enclosure that houses the robotic arm, rotisserie control linkage, and the transport cart, the enclosure comprising one or more laser safety windows.

15. A method comprising:
rotating an aircraft canopy;
during rotation of the aircraft canopy, probing, using a touch probe, the aircraft canopy, wherein probing the aircraft canopy with the touch probe determines a plurality of surface measurements of the aircraft canopy relative to the position of a robotic arm;
creating a three-dimensional model of the aircraft canopy using the plurality of surface measurements; and
during rotation of the aircraft canopy, ablating, using a plurality of predetermined parameters and a laser head of the robotic arm, an interface layer located between a transparent outer layer and the aircraft canopy, wherein a distance between the laser head and an outer surface of the transparent outer layer is controlled using the plurality of surface measurements during the ablation of the interface layer.

16. The method of claim 15 , wherein the predetermined parameters comprise:
a laser fluence;
a speed;
a wavelength; and
a focal distance.

17. The method of claim 16 , wherein the wavelength is selected based on a material of the interface layer.

18. The method of claim 16 , wherein the focal distance is selected so that light from the laser head passes through the transparent outer layer and is focused on the interface layer.

19. The method of claim 15 , wherein the laser head comprises a near infrared (NIR) laser.

20. The system of claim 19 , wherein the laser is a Neodymium laser.

Assignees

• Lockheed Corp

Inventors

• Langevin Jeffrey P
• Drewett Jeffrey T
• Coleman David Haynes
• Flanagan Daniel John
• Twaddle Steven E

Classifications

• G05B19/4207

  in which a model is traced or scanned and corresponding data recorded · CPC title

• B64F5/40

  Maintaining or repairing aircraft · CPC title

• B64F5/50

  Handling or transporting aircraft components · CPC title

• B25J9/1684

  Tracking a line or surface by means of sensors · CPC title

• B64C1/1476

  Canopies; Windscreens or similar transparent elements · CPC title