APPARATUS AND METHOD FOR NONDESTRUCTIVE INSPECTION OF PARTS

• US 20090107244A1
• Filed: 10/26/2007
• Published: 04/30/2009
• Est. Priority Date: 10/26/2007
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Fetzer, Barry A., Bui, Hien T., Walters, William O.
• Granted Patent: US 7,644,618 B2
• Time in Patent Office: Days
• US Class Current: 73/635
• CPC Class Codes: G01N 2291/02854 Length, thickness
• CPC Class Codes: G01N 2291/044 Internal reflections (echoes), e.g. on walls or defects
• CPC Class Codes: G01N 2291/102 one emitter, one receiver
• CPC Class Codes: G01N 2291/269 Various geometry objects
• CPC Class Codes: G01N 29/225 Supports, positioning or alignment in moving situation
• CPC Class Codes: G01N 29/28 providing acoustic coupling , e.g. water impedance matching G10K11/02

Abstract

A method of inspecting a radius area of composite parts with an ultrasonic inspection system, the system includes at least one ultrasonic probe, an upper sliding surface, a lower sliding surface, an adjustable guide rail, and an adjustable encoder wheel rotatably coupled to a rotary encoder, is provided. The method includes generating a high frequency sound wave using the probe including a radius of curvature extending from a center point, the sound wave travels partially through the part, adjusting the guide rail to align the center point of the probe with a center axis of a part corner portion, sliding the part through the inspection system to inspect the corner portion using the sound wave by rotating the wheel and rotary encoder such that the arcuate distance of the part is recorded, adjusting the wheel to avoid any apertures defined within the part, and processing the sound wave information.

Claims

1. A method of inspecting a radius area of composite parts with an ultrasonic inspection system, where the inspection system includes an inspection device that includes at least one ultrasonic probe, an upper sliding surface, a lower sliding surface, an adjustable guide rail, and an adjustable encoder wheel rotatably coupled to a rotary encoder, said method comprising:

generating a high frequency sound wave using the at least one ultrasonic probe, the probe including a radius of curvature extending from a center point, wherein the high frequency sound wave travels at least partially through the part;

adjusting the guide rail to align the center point of the at least one probe with a center axis of a corner portion of the part;

sliding the part through the inspection device to inspect the corner portion of the part using the high frequency sound wave by rotating the encoder wheel and rotary encoder such that the arcuate distance of the part is recorded;

adjusting the encoder wheel to avoid any apertures defined within the part; and

processing the high frequency sound wave information.

2. A method in accordance with claim 1 further comprising:

positioning the part between an upper and a lower sliding surface of the inspection device; and

channeling a fluid between the at least one ultrasonic probe and the part to couple the ultrasonic sound wave to the part.

3. A method in accordance with claim 2 wherein channeling a fluid between the at least one ultrasonic probe and the part further comprises partially submerging the inspection device within a tank filled with an immersion fluid.

4. A method in accordance with claim 1 further comprising generating and receiving the high frequency sound wave using the at least one ultrasonic probe.

5. A method in accordance with claim 1 further comprising generating the high frequency sound wave using the at least one ultrasonic probe and receiving the high frequency sound waves using at least one other ultrasonic probe.

6. A method in accordance with claim 1 further comprising:

identifying a location of at least one discontinuity within the part using the high frequency sound wave information and the recorded arcuate distance of the part; and

outputting the location of the at least one discontinuity within the part.

7. A method in accordance with claim 1 wherein adjusting the guide rail further comprises adjusting the guide rail between about 79°

to about 110°

with respect to the lower sliding surface.

8. A method in accordance with claim 1 wherein adjusting the encoder wheel further comprises moving the encoder wheel between about 1 inch to about 6 inches away from the flange to maintain the wheel in contact with the part.

9. An inspection device for ultrasonic inspection of a variety of differently shaped parts, said inspection device comprising:

a frame;

a support assembly coupled to said frame, said support assembly comprising at least one upper sliding surface and at least one lower sliding surface;

an adjustable guide rail rotatably coupled to said frame and positioned adjacent said lower sliding surface such that an angle is defined between said guide rail and said lower sliding surface; and

an adjustable encoder assembly slidably coupled to said frame, said adjustable encoder assembly comprising;

a wheel configured to contact at least one of the inner surface and the outer surface of the part; and

a rotary encoder rotatably coupled to said wheel.

10. An inspection device in accordance wit claim 9 wherein said adjustable guide rail is oriented between about 79°

to about 110°

with respect to said lower sliding surface.

11. An inspection device in accordance with claim 9 wherein said adjustable guide rail is rotatable about an axis of rotation tat is substantially coaxial with a center axis defined by an inner and outer radii of curvature of the part.

12. An inspection device in accordance with claim 9 wherein said adjustable encoder assembly is moveable between about 1 inch to about 6 inches away from a flange of the part.

13. An ultrasonic inspection device in accordance with claim 9 further comprising at least one ultrasonic probe that is configured to generate and receive a high frequency sound wave.

14. An ultrasonic inspection device in accordance with claim 9 further comprising a first ultrasonic probe positioned opposite a second ultrasonic probe, wherein said first ultrasonic probe is configured to generate a high frequency sound wave and said second ultrasonic probe is configured to receive the high frequency sound wave after passing through the part.

15. An ultrasonic inspection system for the inspection of a variety of differently shaped parts, said ultrasonic inspection system comprising:

a tank at least partially filled with an immersion fluid;

an inspection device at least partially submerged within said tank, said inspection device comprising;

a frame;

a support assembly coupled to said frame, said support assembly comprising at least one upper sliding surface and at least one lower sliding surface;

an adjustable guide rail rotatably coupled to said frame and positioned adjacent said lower sliding surface such that an angle is defined between said guide rail and said lower sliding surface; and

an adjustable encoder assembly slidably coupled to said frame, said adjustable encoder assembly comprising;

a wheel configured to contact at least one of an inner surface and an outer surface of the part; and

a rotary encoder rotatably coupled to said wheel;

at least one ultrasonic probe coupled within said inspection device, wherein said at least one ultrasonic probe generates a high frequency sound wave that passes through the immersion fluid and at least partially through a corner portion of the part; and

a computer coupled in communication with said rotary encoder and said at least one ultrasonic probe, said inspection system operable to identify and locate discontinuities within the part.

16. An ultrasonic inspection system in accordance with claim 15 wherein said adjustable guide rail is oriented between about 79°

to about 110°

with respect to said lower sliding surface.

17. An ultrasonic inspection system in accordance with claim 15 Wherein said adjustable guide rail is rotatable about an axis of rotation that is substantially Coaxial with a center axis defined by an inner and outer radii of curvature of the part.

18. An ultrasonic inspection system in accordance with claim 15 wherein said adjustable encoder assembly is moveable between about 1 inch to about 6 inches away from a flange of the part.

19. An ultrasonic inspection system in accordance with claim 15 wherein said at least one ultrasonic probe is configured to generate and receive the high frequency sound wave.

20. An ultrasonic inspection system in accordance with claim 15 further comprising a first ultrasonic probe positioned opposite a second ultrasonic probe, wherein said first ultrasonic probe is configured to generate the high frequency sound wave and said second ultrasonic probe is configured to receive the high frequency sound wave after passing through the part.