Accession Number : ADA297362

Title :   Large Area Smart Piezoelectric and Pyroelectric Sensors.

Descriptive Note : Interim rept. no. 9,

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

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

PDF Url : ADA297362

Report Date : JUL 1995

Pagination or Media Count : 21

Abstract : In the eighth interim report investigation into the viability of transducers made from composite materials for use as acoustic emission detectors was made. The report showed that the transducers were capable of detecting acoustic emission from a pencil lead break and an attempt was made to characterise the frequency response of the various transducers over the range 0 - 1MHz by use of the face-to- face method. This report details a further investigation into the characteristic frequency response of the transducers over the frequency range of 0 - 50 MHz. Examination is conducted into the transmission of ultrasonic acoustic pulses into water and the detection of these pulses upon reflection from a solid object in what is termed the pulse-echo mode. (MM)

Descriptors :   *COMPOSITE MATERIALS, *PIEZOELECTRIC MATERIALS, *SOUND TRANSMISSION, *ACOUSTIC SIGNALS, *PYROELECTRICITY, *ACOUSTIC EMISSIONS, DETECTION, DETECTORS, WATER, REPORTS, SOLIDS, DEFECTS(MATERIALS), ECHOES, PULSES, ULTRASONICS, VIABILITY, TRANSDUCERS, HYDROPHONES, FREQUENCY RESPONSE, ACOUSTIC DETECTORS, PENCIL BEAMS.

Subject Categories : Laminates and Composite Materials
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE