Sponsor
Portland State University. Department of Civil and Environmental Engineering
First Advisor
Thomas Schumacher
Date of Award
Summer 2020
Document Type
Project
Degree Name
Master of Science (M.S.) in Civil & Environmental Engineering
Department
Civil and Environmental Engineering
Language
English
Subjects
Ultrasonic testing, Manufactures -- Nondestructive testing, Quality control
DOI
10.15760/CCEMP.50
Abstract
Manufactured parts are a staple of modern urban life, visible in homes (e.g., kitchen appliances), offices (e.g., printers), the automobile and aerospace industries (e.g., body parts), and more. This M.S. project intended to determine whether ultrasonic testing could be used in a simple and rapid manner to perform quality control of manufactured parts. Ultrasonic testing is employed for this purpose using two surface-coupled transducers, one being a transmitter and the other one a receiver. An ultrasonic pulse, which is generated by the transmitting transducer, propagates through the part, collecting information about material and geometry, as well as potential unwanted features. The resulting response is recorded at the receiving transducer for a long duration, i.e. until the wave amplitude has dampened out. Coda wave analysis, which studies the later portions of a recorded signal, is then used to compute a similarity index between a signal from a part and a signal from a reference part that has been examined and approved. Coda wave fields have been found significantly more sensitive to minute differences in two signals compared to the first wave arrival. This MS project report introduces the setup and instrumentation, testing methodology, coda wave analysis and similarity indices, and discusses the feasibility of the proposed approach on a set of manufactured parts made of different materials with different alterations.
Rights
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
Persistent Identifier
https://archives.pdx.edu/ds/psu/33500
Recommended Citation
Marin-Cortes, Alexei, "Ultrasonic Coda Wave Comparison for Quality Control of Manufactured Parts: Proof of Feasibility" (2020). Civil and Environmental Engineering Master's Project Reports. 51.
https://doi.org/10.15760/CCEMP.50
Comments
A research project report submitted in partial fulfillment of the requirement for the degree of Master of Science in Civil and Environmental Engineering.