Location

La Jolla, CA

Start Date

1-1-1993 12:00 PM

Description

In ultrasonic NDE, spherically focussed transducers are often used because they possess higher sensitivity and spatial resolution than conventional planar transducers [1]. A common reference standard setup that can be used to obtain the effective radius, focal length, and transduction efficiency of a spherically focussed probe is the immersion configuration shown in Figure 1 where a scatterer of simple shape (such as a sphere or cylinder) is placed on the axis of the transducer and the pulse-echo response measured. A model is developed here that allows the use of this measured response to obtain the important transducer parameters. The model is computationally efficient and the methods of characterization are directly analogous to those that have been successfully used for planar probes [2].

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

12A

Chapter

Chapter 4: Sensors and New Techniques

Section

Ultrasonic and Acoustic Sensors

Pages

925-931

DOI

10.1007/978-1-4615-2848-7_118

Language

en

File Format

application/pdf

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Jan 1st, 12:00 PM

A focussed transducer/scatterer model for ultrasonic reference standards

La Jolla, CA

In ultrasonic NDE, spherically focussed transducers are often used because they possess higher sensitivity and spatial resolution than conventional planar transducers [1]. A common reference standard setup that can be used to obtain the effective radius, focal length, and transduction efficiency of a spherically focussed probe is the immersion configuration shown in Figure 1 where a scatterer of simple shape (such as a sphere or cylinder) is placed on the axis of the transducer and the pulse-echo response measured. A model is developed here that allows the use of this measured response to obtain the important transducer parameters. The model is computationally efficient and the methods of characterization are directly analogous to those that have been successfully used for planar probes [2].