Accession Number:

AD0686345

Title:

DEVELOPMENT OF A LOW FREQUENCY ULTRASONIC INSPECTION SYSTEM FOR THE M-149 WATER TANK,

Descriptive Note:

Corporate Author:

GENERAL AMERICAN TRANSPORTATION CORP NILES ILL GENERAL AMERICAN RESEARCH DIV

Personal Author(s):

Report Date:

1967-12-01

Pagination or Media Count:

61.0

Abstract:

The purpose of the program was to determine the feasibility of low frequency ultrasonic techniques for detecting voids and debonds in the M-149 water tank. The major objectives of the program were to 1 determine the capability of existing equipment, 2 investigate all low frequency techniques, through-transmission, pulse-echo, and pitch-catch to determine the best method, and 4 demonstrate it on a test tank. An evaluation of commercially available equipment showed that it was necessary to design and build a high power low frequency ultrasonic generator to investigate one sided methods, namely pulse-echo and pitch-catch. Extensive testing with pulse-echo and pitch-catch showed both methods to be unfeasible for this application. One technique for eliminating the inside operator was considered theoretically, but couldnt be tried experimentally because of a shortage of funds. This technique would make use of an omnidirectional transducer on the inside of a water filled M-149 tank. Investigation of this technique is recommended as a future course of action when the necessary funds are available or action warrants. Author

Subject Categories:

  • Containers and Packaging
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE