An Acoustic Transponder for Calibrating Ultrasonic Equipment.
Abstract
Effective inspection of structural materials by ultrasonic techniques requires that the acoustically detected anomalies be properly displayed with respect to time (depth location) and amplitude. This requirement is particularly important when interpolating the flaw signal from a reference standard or when making periodic reinspections of known flaws. In order to verify such accuracy in the ultrasonic equipment, an electronically controlled acoustic transponder has been developed and built to Navy specifications. This device is used to verify the time and amplitude linearity, resolution capability and dB attenuator accuracy of conventional ultrasonic equipment, either in the field or in the laboratory. If required, the accuracy of this device may be made traceable to the Bureau of Standards. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1977
- Accession Number
- ADA049178
Entities
People
- Henry H. Chaskelis
Organizations
- United States Naval Research Laboratory