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Non-contact ultrasonic techniques.

Robert E Green¹

¹Materials Science and Engineering Department, Johns Hopkins University, 102 Maryland Hall, 3400 N. Charles Street, Baltimore, MD 21218-2689, USA.

|March 30, 2004

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Non-contact acoustic and ultrasound methods enable measurements in harsh conditions and remote locations. These techniques, including laser generation and EMATs, are vital for unique materials characterization.

Area of Science:

Materials Science
Acoustics
Ultrasonics

Background:

Non-contact acoustic and ultrasound waveform generation and detection are crucial for measurements in challenging environments.
Current non-contact techniques include laser generation, optical interferometric detection, electromagnetic acoustic transducers (EMATs), and air/gas-coupled systems.

Purpose of the Study:

To describe the application of non-contact acoustic and ultrasonic systems in unique materials characterization.
To highlight the advantages of non-contact methods for measurements in extreme conditions.

Main Methods:

Review of existing non-contact acoustical and ultrasonic techniques.
Case studies demonstrating the use of these systems in materials characterization.

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Main Results:

Demonstration of the feasibility and utility of non-contact methods for materials characterization.
Successful application of techniques like laser generation and EMATs in specialized scenarios.

Conclusions:

Non-contact acoustic and ultrasonic techniques offer versatile solutions for materials characterization.
These methods are essential for measurements in high temperatures, corrosive environments, and difficult-to-access locations.