Location

San Diego, CA

Start Date

1-1-1985 12:00 AM

Description

Holographic imaging has been successfully used to detect bubbles in the face rubber and debonds between the rubber and metal on the face and sides of the head mass and shroud of sonar transducers.1-3 This work was done using holographic inspection equipment and techniques applied in the rubber tire industry. A considerable amount of baseline data exists for tires from which a determination of the seriousness of an observed defect can be made, but this is not yet the case for transducers. The relationship between the appearance of a holographic image and the impact of the indicated defect on the reliability and lifetime of the transducer is unknown. The basic questions are: How do debonds affect transducer lifetime? How should the fringe pattern of the holographic image be interpreted? What does the fringe pattern reveal about the size of the actual defect?

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

4A

Chapter

Chapter 1: Ultrasonics

Section

Imaging and Reconstruction

Pages

279-286

DOI

10.1007/978-1-4615-9421-5_31

Language

en

File Format

Application/pdf

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Jan 1st, 12:00 AM

Holographic Inspection for Debonds in Sonar Transducer Head Mass/Shroud Subassemblies

San Diego, CA

Holographic imaging has been successfully used to detect bubbles in the face rubber and debonds between the rubber and metal on the face and sides of the head mass and shroud of sonar transducers.1-3 This work was done using holographic inspection equipment and techniques applied in the rubber tire industry. A considerable amount of baseline data exists for tires from which a determination of the seriousness of an observed defect can be made, but this is not yet the case for transducers. The relationship between the appearance of a holographic image and the impact of the indicated defect on the reliability and lifetime of the transducer is unknown. The basic questions are: How do debonds affect transducer lifetime? How should the fringe pattern of the holographic image be interpreted? What does the fringe pattern reveal about the size of the actual defect?