Accession Number : ADD015321

Title :   Phase Cancellation Enhancement of Ultrasonic Evaluation of Metal-To-Elastic Bonding.

Descriptive Note : Patent, filed 17 May 90, Patented 18 Feb 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Gammell, Paul M

Report Date : 18 Feb 1992

Pagination or Media Count : 8

Abstract : Acoustical radiation is generated and applied to the bonding interface between a radiation transmission material and a radiation attenuating material to determine adhesion quality by extraction of data from a response signal produced by echoes reflected from both the interface and the radiation entry surface on the radiation transmissive material exposed to the generated acoustical radiation. Signal phase cancellation between the echoes from the entry surface and bonding interface produce a signal signature from which the quality of bonding is evaluated. By partial attenuation of the echo from the entry surface, the signature is maximized.

Descriptors :   *ADHESION, *ULTRASONIC RADIATION, ATTENUATION, BONDING, CANCELLATION, ECHOES, EXTRACTION, INTERFACES, MATERIALS, RADIATION, SIGNALS, SIGNATURES, SURFACES, PATENTS, ACOUSTIC DETECTION

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE