Point-Contact Transducers for Ultrasonic Testing.
Abstract
The feasibility of employing point-shaped ultrasonic transducers which directly amplify the detected ultrasonic signal was investigated. Two approaches were considered, one used a semiconductor point with a depletion layer at the very tip produced by a bias voltage, the other employed the variation of contact resistance with contact pressure. The latter method was explored experimentally and found suitable for the detection of ultrasonic energy. In addition, experiments are described in which high-frequency sparks were produced at the specimen surface to generate ultrasonic vibrations. (Author-PL).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1962
- Accession Number
- ADA950535
Entities
People
- Otto R. Gericke