Crimped tool marks measurement using structured laser analysis: II

Dennis P. Sarr; Joey H. Mullen

doi:10.1117/12.294466

10 December 1997 Crimped tool marks measurement using structured laser analysis: II

Dennis P. Sarr, Joey H. Mullen

Proceedings Volume 3204, Three-Dimensional Imaging and Laser-based Systems for Metrology and Inspection III; (1997) https://doi.org/10.1117/12.294466
Event: Intelligent Systems and Advanced Manufacturing, 1997, Pittsburgh, PA, United States

Abstract

Heating and cooling air for an aircraft interior is transported using metal ducts. These ducts vary in size from a few centimeters to 20 centimeters in diameter. In the assembly of aircraft components, a coupling is swaged onto the ducts. In assuring the mechanical dies are operating properly, the crimp mark is checked. The current method of visual inspection and checking with calipers does not allow implementation of statistical process control methods. In an effort to improve this process check, a new measurement method is being developed. A feasibility study indicated that a structured light laser system would be a good approach. A few requirements were: it must be portable to be used at different locations within the fabrication area, it must be fast, it should be easy to use by the mechanic/inspector, the readings must be accurate, and the system is non destructive. Due to the mechanical configuration of the tube and coupling, a camera with magnification optics is used. The measurement of the bump has a maximum of 50.8 microns (0.0020 inch). The system uses computer vision, and custom software written in C++. A low cost frame grabber is used. This paper shows the final production prototype system and its configuration for factory testing. This paper discusses the design and testing of the system.

Citation Download Citation

Dennis P. Sarr and Joey H. Mullen "Crimped tool marks measurement using structured laser analysis: II", Proc. SPIE 3204, Three-Dimensional Imaging and Laser-based Systems for Metrology and Inspection III, (10 December 1997); https://doi.org/10.1117/12.294466

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available