Location

Seattle, WA

Start Date

1-1-1996 12:00 AM

Description

Ultrasonic methods of nondestructive testing become more and more quantitative. They aim not only to detect but also to identify and characterize defects. This results in contradictory requirements for transducer design. One sought improvements in axial resolution for a given frequency range in reducing the pulse duration, leading to low sensitivity and failing in the case of small defects close to the transducer. Good transverse resolution with a planar transducer is obtained by using it in itspseudo-focal zone in which the ultrasonic beam is narrow, that is, at a range corresponding to the limit of the near-field, even if this range is ill-defined in the case of a broad band transducer.

Volume

15A

Chapter

Chapter 4: NDE Sensors

Section

Ultrasonic Transducers (Liquid Coupled)

Pages

979-986

DOI

10.1007/978-1-4613-0383-1_128

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

A New Ultrasonic Transducer Combining Three Modes: High Axial Resolution, High Transverse Resolution and Standard Modes

Seattle, WA

Ultrasonic methods of nondestructive testing become more and more quantitative. They aim not only to detect but also to identify and characterize defects. This results in contradictory requirements for transducer design. One sought improvements in axial resolution for a given frequency range in reducing the pulse duration, leading to low sensitivity and failing in the case of small defects close to the transducer. Good transverse resolution with a planar transducer is obtained by using it in itspseudo-focal zone in which the ultrasonic beam is narrow, that is, at a range corresponding to the limit of the near-field, even if this range is ill-defined in the case of a broad band transducer.