Feasibility study on phased array of interdigital mesoscale transducers for health monitoring of smart structures

Shiv P. Joshi

doi:10.1117/12.208262

8 May 1995 Feasibility study on phased array of interdigital mesoscale transducers for health monitoring of smart structures

Shiv P. Joshi

Author Affiliations +

Proceedings Volume 2443, Smart Structures and Materials 1995: Smart Structures and Integrated Systems; (1995) https://doi.org/10.1117/12.208262
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

Abstract

A novel method of monitoring damage in structures is presented. The concept utilizes an electronically steered acoustic beam produced by an array of interdigital transducers placed in the structure. The acoustic beam is scattered by the damage, and therefore the scattered signal received by the array contains detailed information about the damage. A brief discussion of resolution and accuracy of the damage detection by acoustic waves is presented followed by the basic aspects of beam formation, array aperture and electronic beam steering. The description of cross-field interdigital piezoelectric transducers to produce bulk waves of sufficient strength is also included. The aspects that make the proposed concept different and desirable with respect to the prevalent nondestructive testing by external ultrasonic transducer are presented as the concluding remarks.

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Shiv P. Joshi "Feasibility study on phased array of interdigital mesoscale transducers for health monitoring of smart structures", Proc. SPIE 2443, Smart Structures and Materials 1995: Smart Structures and Integrated Systems, (8 May 1995); https://doi.org/10.1117/12.208262

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