INVERSION OF ULTRASONIC TRACES

Authors
  1. Zala, C.
  2. Churchill, L.
Corporate Authors
Defence Research Establishment Pacific, Victoria BC (CAN);Barrodale Computing Services Ltd, Victoria BC (CAN)
Abstract
The development of reliable techniques for inspecting materials and detecting and characterizing defects is of increasing importance in non-destructive evaluation. Pulse-echo ultrasonic techniques are particularly useful in this application; here a pressure wavelet generated by a transducer is directed at the material and the reflection response (trace) is measured by the transducer. This trace contains information about the underlying structure of the material. However, due to the nature of the measurement process, the structural information is not directly available and must be derived by suitable processing of the measured data. The overall process of forming a structural model on the basis of acoustic measurements is called inversion. We consider here the problem of inversion in the case of normal incidence, where only compressional (acoustic) and not shear (elastic) waves are to be considered.
Report Number
DREP-CRS-89-41 — Contractors Report Series (Interim)
Date of publication
15 Dec 1989
Number of Pages
40
DSTKIM No
90-02775
CANDIS No
65033
Format(s):
Hardcopy;Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: