A Circular Transducer Array for Ultrasonic Inspection of Plates and Sheets.
Abstract
Several years ago, in an effort to increase the reliability of detection of randomly oriented cracks, a rotating transducer head was designed to be mounted on the carriage of an automatic ultrasonic plate inspection system. The weight of the rather sturdy motor needed to rotate this device made it impractical, but the principle was sound. Recent developments in the miniaturization of electronic circuitry have made possible a substitute for rotation, namely, sequential operation of a ring of transducers. An experimental model has been built. This report describes its performance. It was not intended that it give complete coverage, that is, detect flaws of all orientations. The basis for choice of design parameters for complete coverage is discussed. Since the transducers and their attendant circuits are discrete, various modes of operation are possible, such as one transmitting and all receiving, all transmitting and receiving, and one transmitting and receiving alone. With the assistance of computer control, computer evaluation, and computer graphics the circular transducer array could become a powerful tool for characterizing and evaluating flaws. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 20, 1977
- Accession Number
- ADA041422
Entities
People
- K. E. Simmonds
- S. D. Hart
Organizations
- United States Naval Research Laboratory