Physical Monitoring Principles
Passive and Active Measurements with Data Analysis Approaches for Load and Damage Identification
Published Online: 15 SEP 2009
Copyright © 2009 John Wiley & Sons, Ltd. All rights reserved.
Encyclopedia of Structural Health Monitoring
How to Cite
Hillger, W. 2009. Ultrasonic Methods. Encyclopedia of Structural Health Monitoring. .
- Published Online: 15 SEP 2009
Ultrasonic testing (UT) is a well-established nondestructive technique. It is based on ultrasonic waves in a frequency range usually from 0.5 to 20 MHz. UT provides a quality control, determination of material properties, and a flaw detection with location in all three dimensions. Using echo technique, only a one-sided access of the test component is necessary. A flaw detector provides instantaneous results. Automated systems deliver images like C-scans (top view) and B-scans (view in cross-section direction) of hidden defects. In this article, the physical principles of UT are explained and the parts of an imaging system are described.
- nondestructive testing;
- ultrasonic testing (UT);
- acoustic waves;
- reflection scattering;
- defect detection;
- ultrasonic imaging;
- visualization of wave propagation;
- air-coupled ultrasonic testing