Accession Number : ADA291487

Title :   Large Area Smart Piezoelectric and Pyroelectric Sensors,

Descriptive Note : Interim rept. no. 7,

Corporate Author : UNIVERSITY COLL OF NORTH WALES BANGOR SCHOOL OF ELECTRONIC ENGINEERING AND CO MPUTER SYSTEMS

Personal Author(s) : Das-Gupta, D. K. ; Wenger, M. P.

PDF Url : ADA291487

Report Date : JAN 1995

Pagination or Media Count : 7

Abstract : The present report provides an account of the embedment of a composite material transducer within an E-glass reinforced epoxy laminate structure for use as an in-situ AE sensor, strain gauge or ultrasonic detector I transmitter for NDT techniques. It is envisaged that by embedding a transducer within a structure it may be used as an 'early warning' device, which would warn against potential failure of the structure. Another way of thinking is that the transducer while being used in a sensing mode can then be used in an actuating mode by use of a feedback circuit thus for example being used to damp out any unwanted vibrations of the structure. (MM)

Descriptors :   *COMPOSITE MATERIALS, *CERAMIC MATERIALS, *EPOXY COMPOSITES, *PIEZOELECTRIC TRANSDUCERS, LAMINATES, CRYSTAL LATTICES, FIBER REINFORCED COMPOSITES, ACOUSTIC DETECTION, GRAIN SIZE, PIEZOELECTRICITY, LEAD TITANATES, STRAIN GAGES, FAILURE(MECHANICS), PYROELECTRICITY.

Subject Categories : Electrical and Electronic Equipment
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE